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Literatura académica sobre el tema "Clutches (Machinery) Power transmission"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 7 de febrero de 2022

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Artículos de revistas sobre el tema "Clutches (Machinery) Power transmission"

1

Li, Zhi Xiang y Jing Zheng. "A Transmission Control System's Research for a Nursing Bed with Four Transmissions Driven by a Single Motor". Advanced Materials Research 443-444 (enero de 2012): 518–22. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.518.

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This paper introduces a kind of multi-function nursing bed control system which has won Chinese invention patent. This system takes AT89C51 as a core, uses a unique control mode for a single electrical machinery driven four transmissions, and adopts a modular control technology which respectively controls the movements of four lead screws through electrical machinery’s positive or negative rotation, and electromagnetic clutch’s connection or disconnection to decide the power transmission direction, so as to realize the different postures of the nursing bed, and meet the demands of patient care.

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Matyja, Tomasz y Bogusław Łazarz. "Simulation Studies of the Effect of Shaft's Nonlinear Flexural Stiffness Parameters for Critical States of Rotating Power Transmission Systems". Solid State Phenomena 236 (julio de 2015): 62–69. http://dx.doi.org/10.4028/www.scientific.net/ssp.236.62.

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The paper presents simulation studies, performed using Simulink, the impact of nonlinear flexural stiffness of shafts for critical speed range and amplitude of vibration. The tests were performed on the selected model of a rotating machine, consisting of a drive, two torsional vibration dampers, shaft with mounted on it two rigid rotors (discs), supported on a three self-aligning roller bearings and mechanical power receiver (brake). The machine startup and braking with crossing the critical states was simulated using specialized Simulink library, which was developed by authors for analysis of transient states in rotating machines and flexural-torsional couplings. In accordance with the concept of modeling adopted by the authors, rotating system is divided into inertial rigid elements (rotors, bearings, clutches, etc..) and compliance elements (parts of the shaft). The main component of the currently developed library is block modeling rigid rotor with 6 degrees of freedom and with the static and dynamic unbalance. By assumption the library is a modular, expandable and allows modeling the systems of any configuration. The goal of the simulation was to verify how nonlinear flexural stiffness of shaft influences the values of critical speeds and the level of flexural and torsional vibrations.

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3

Duan, Jian Rui, Jin Yao y Hua Li. "The Calculation Method of Lock-Up Clutch Friction Work". Applied Mechanics and Materials 475-476 (diciembre de 2013): 1375–81. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1375.

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In order to calculate the friction work of lock-up clutch, which come from the lock-up process of hydraulic torque converter, this article established a simplified dynamic model of the engine and hydraulic torque converter , according to the route of power transmission and the rule of moment balance. And then the mathematical model of the lock-up process was deduced. This article reached a calculation method of lock-up clutch friction work by the mathematical model , and did some further simplified. Meanwhile, the lock-up process was simulated by Matlab/Simulink. By analyzing the simulatin resultthe computed result of machinery bookthe computed result of the improved method, the correctness of the improved method was verified.

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4

Rafea M. Abd El-Maksoud, Rafea M. Abd El-Maksoud. "Advanced Power Transmission System". journal of King Abdulaziz University Engineering Sciences 23, n.º 2 (22 de febrero de 2012): 191–207. http://dx.doi.org/10.4197/eng.23-2.10.

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Different researches are adopted to modify and enhance automatic transmission by every means. Whereas, torque converter that represents the most important component in such transmission suffers from some problems that are not completely solved. In this paper, power transmission system is herein introduced as a unique power transmission system that is not affected by torque converter problems. This power transmission operates with power splitting concept and is composed of conventional torque converter connected to planetary sets. Three clutches are used to shift the operating modes and unique positive displacement hydraulic couplings are utilized to regulate performance in power paths. Also, a modified model used to predict torque converter performance is utilized with planetary gear kinetics to assess the transmission performance. Moreover, the present system operates with high performance. Unlike the automatic transmission that operates in line, the present system operates with infinity number of operational bands for each engine speed.

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5

Li, Yan Min, Zhi Hua Liu, Dong Wang y Yong Zhang. "Analysis on the Shifting Performance of the Hydraulic System of a Transmission for Construction Machinery". Advanced Materials Research 201-203 (febrero de 2011): 2206–11. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2206.

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The paper discusses the performance of a hydraulic system controlling the shifting action of a construction vehicle transmission. Based on the principle of the hydraulic system of the transmission, a simulation model of the hydraulic system is established using AMEsim software. The simulation results indicate that the double-step hydraulic cylinder structure has an advantage of a fast, smooth and reliable shifting. The shifting connecting and separating overlap time of two clutches can be controlled precisely by an electronic joystick. The fast response speed can be ensured because using screw-in cartridge valves acting as the directional valves. Some techniques of improving the shifting quality are obtained. There is a great reference for the construction vehicles’ transmission in the future.

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6

Sheu, Kuen Bao, Tsung Hua Hsu y Yuan Yong Hsu. "A Novel Parallel Hybrid Motorcycle Transmission". Materials Science Forum 505-507 (enero de 2006): 1021–26. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.1021.

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This paper presents a novel parallel hybrid transmission for motorcycles. This transmission incorporates a mechanical type rubber V-belt continuously variable transmission and chain drives to combine the power of the two power sources, an internal combustion engine and an electric motor. By using the mechanical type clutches used in the proposed transmission, it can provide a parallel hybrid that can be grouped into four modes of operation: electric motor mode, engine mode, engine/charging mode, and power mode. A design example is built and tested.

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7

Chen, De Min, Qing Ge Cai y Hong Zhang. "Simulation and Test Study of Multidisc Magneto-Rheological Fluid Clutch". Applied Mechanics and Materials 599-601 (agosto de 2014): 464–67. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.464.

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A Magneto-rheological Fluid Clutch (MRC for short) which has a novel and simple structure is designed; the research on the magnetic field distribution is based on the finite element simulation software which is named Ansoft; In order to test the work performance, the electronic torsion testing machine is used for the torque transmission capability and controllability test. The experimental results reveal that the MRC could meet the torque transmission demand of high power machine and response quickly and reliably.

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8

Hoodorozhkov, Sergey y Andrey Krasilnikov. "Digital twin of wheel tractor with automatic gearbox". E3S Web of Conferences 164 (2020): 03032. http://dx.doi.org/10.1051/e3sconf/202016403032.

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This article describes the digital twin of power drive unit (engine and transmission) of 8-ton class wheel tractor with automatic gearbox. Detailed mathematical model of considered tractor power drive unit - engine with 16-speed automatic gearbox and friction shift of stages under load without breaking the power flow is given. The theoretical methods of research are based on the use of the MATLab package. With the help of fundamental package units, models of gearbox physical components are created: friction clutches, gears, shafts with the required properties, engine mathematical model, as well as model of the transmission control system. The calculation methods of the gearbox dynamic processes going on in the gear shifts using friction clutches is proposed. A feature of the mathematical model is consideration of the resistive torque, the rate of rise of switched on clutches friction torque, both during switching to the higher and lower gears. Mathematic simulation of tractor power drive unit operation under load was performed. The results of the completed calculations are presented. The possibility of using this digital model to simulate tractor operation during its main work operations is shown.

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9

Liu, Jikai, Biao Ma, Heyan Li, Man Chen y Guoqiang Li. "Control strategy optimization for a dual-clutch transmission downshift with a single slipping clutch during the torque phase". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, n.º 5 (10 de mayo de 2017): 651–66. http://dx.doi.org/10.1177/0954407017704783.

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During the torque phase, appropriate coordination between two clutches is of vital importance to the dual-clutch transmission so that a high-quality shift is achieved without clutch interaction and engine flare, because a poor-quality shift definitely extends the shift time and increases the friction work. Concerning this problem, two different power flow conditions during the torque phase are discussed in detail, after investigation of the dual-clutch transmission downshift process and the design of an H∞ robust controller for the inertia phase. The results obtained indicate that, if two clutches are slipping simultaneously during the torque phase, either power interruption or power circulation occurs. Thus, by optimizing the relationship between the two clutches, a novel control strategy is proposed for the dual-clutch transmission so that the downshift process is accomplished with only one slipping clutch, in order to obtain the highest system efficiency. The system model was established on the MATLAB/Simulink platform and used to study the variations in the torque and the speed output in response to different control strategies. The simulation results show that, with the smooth inertia phase guaranteed by the robust controller, the proposed control strategy not only can avoid power interruption or power circulation during the torque phase but also can shorten the shift time (from 1.1 s to 0.8 s) and reduce the jerk level (from 6.8 m/s3 to 5.7 m/s3) effectively, in comparison with the conventional control strategy. Finally, to validate the effectiveness of the proposed control strategy, bench tests on a dual-clutch transmission were carried out, and the test data obtained show good agreement with the simulation results.

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10

Rogkas, Nikolaos, Despoina Almpani, Georgios Vasileiou, Eustratios Tsolakis, Christos Vakouftsis, P. Zalimidis y Vasilios Spitas. "A comparative study on the effect of disks geometrical features on the drag torque of a wet friction clutch". MATEC Web of Conferences 317 (2020): 04001. http://dx.doi.org/10.1051/matecconf/202031704001.

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In recent years, the need for highly efficient automatic and semiautomatic powertrains has led to the wide use of wet friction clutches as power transmission systems. While wet friction clutches surpass their counterparts dry-friction clutches in the engagement process as they provide higher efficient torque and smoother torque and speed transmission, yet they fall behind in their disengaged state where the clutch acts as a power loss to the system due to the drag torque developed on the disks from fluid’s viscous shear stresses. Shear stresses are developed due to the relative speed difference of coaxial disks distanced at a prescribed axial clearance and rotating independently, yielding to a torsional Couette shear flow. This matter has been investigated thoroughly in the literature with experimental and numerical approaches for the case of flat disks admitting the complex flow pattern, which is augmented even more from the presence of geometrical features (grooves) on the surface of the disks. It becomes clear that the efficient calculation and understanding of drag torque can lead to its minimization and therefore to further establishing the use of wet clutches. In this work the effect of various disks geometrical features on the drag torque of a wet clutch is examined. The results are obtained via FEA (Finite Element Analysis) using the commercial software ANSYS.

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Tesis sobre el tema "Clutches (Machinery) Power transmission"

1

Zhu, Farong. "Nonlinear dynamics of one-way clutches and dry friction tensioners in belt-pulley systems". Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158689667.

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2

Gustafsson, Filip. "Wet clutch load modeling for powershift transmission bench tests". Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-33263.

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In this thesis a model is developed for calculating the loads on the wetclutches in apowershift transmission. This thesis was done at Volvo CE in Eskilstuna and is focusedon their 4-speed countershaft transmissions. The goal of the project is to be able tocalculate the loads automatically during the transmission tests and thus acquire increasedknowledge about what occurs during operation.The model was developed by first generating a number of concepts and then evalu-ating them to decide which one should be developed further. The chosen concept wasthen developed further and implemented into the test equipment as a calculation script.The chosen loads to model were the energy absorbed in each clutch, the coefficient offriction (COF) and the slip distance. The COF was later found to give too unreliableresults to be used in any other way than as a benchmark for how well the model wasconfigured and to see any large changes in COF.The model was validated by calculating the energy absorbed in a HTE-200 seriestransmission and comparing it to a reference calculation model. It was seen that theresults from the new model are very close to the reference result. The energy lostcalculated by the new model will be equal to 94 % of the energy lost calculated by thereference model, but only when measuring the inertia phase. The energy lost is equalto 135 % when the torque phase is included. The increasing difference is believed tobe because of an error in the reference model that means it does not cover the torquephase.

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3

Shellenberger, Michael J. C. "Design considerations for variable power split hydraulic drives for industrial applications". Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=655.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains x, 91 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 68-69).

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4

Al-Hamood, Amjad. "Friction and thermal behaviour in elastohydrodynamic lubrication power transmission contacts". Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/74240/.

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This thesis reports experimental and theoretical analyses to study the heat generation and partition between contacting bodies under rolling/sliding elastohydrodynamic (EHL) point contact. A twin disk test rig was re-commissioned and used for the experimental work. 76 mm diameter crowned, super-finished test disks, fixed on parallel shafts, were used in the experimental EHL tests. In each disk, 6 thermocouples were installed to measure the temperature during sliding/rolling contact under EHL conditions. In addition, ceramic washers were fixed on the plane sides of each disk to minimize heat transfer over those surfaces. A Labview data acquisition system was built for acquiring data from the sensors installed on the rig. The EHL experimental results show the fast disk has significantly higher bulk temperature than the slow disk. A transient two dimensional numerical model was constructed to calculate the average circumferential temperature distribution within the disks using three thermocouples as a boundary condition. The heat partition factor,  , and convection heat transfer coefficient, h, were varied systematically in the model. A linear relationship between  and hf for the fast disk and 1- and hs for the slow disk were obtained. These two linear relations were related together by the variation of h with the rotational speed. Over the approximately steady state condition, the calculated  using this approach was in the range of 0.65 to 0.77 for 32 EHL tests at different loads and sliding speeds. This means that the majority of heat is conducted to the fast disk, which is compatible with the previous findings. In order to carry out transient modelling, the unloading mechanism was developed to ensure rapid disk separation. This improved the temperature trend in the cooling phase. In addition, a microswitch was used to give accurate monitoring of the disks contacting and separation. The thermocouple arrangement within the disks and their installation technique were assessed and developed. An immersion test in a hot oil bath was used to test the thermocouples dynamic response. This test was modelled, and the results showed significant lag in the measurements. It was concluded that a system identification method is required to identify the dynamic characteristics of the temperature measurement system in order to compensate for time lagging Extensive studies were carried out to determine the cause behind some of the experimental uncertainties. It was found that the most likely reason behind these uncertainties is the contact pressure variation along the disk-shaft interference fit, which would result in significant thermal conductance variation. The traction force measurement within the EHL contacts has shown broadly linear increase with increased load at constant sliding speed. This indicates a constant coefficient of friction at constant sliding speed. The results also showed that the coefficient of friction decreases as the sliding speed increases.

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5

Li, Zheng. "Spur gear teeth contact analysis on power-train transmission noise, vibration and harshness". Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/3163/.

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The gear meshing is very complex process as high non-linearity behaviour is involved during the process. Normally most analysis of gear tooth contact is on the basis of a hypothesis that the contacted gear teeth are cantilever beams to obtain the approximate results quickly. However, many important factors have been ignored in simulating gear tooth contact using cantilever beam hypothesis, those factors include tooth profile variations, gear rotation speed and input torque, coefficient of friction and geometry distortion. Many of non-linear responses such as noise, vibration, abrasion and so on make the actual contact process much more complicated than those in the cantilever beam hypothesis although it is a reliable reference for integrated gear performance investigation. The main contribution of this thesis is in the investigation of the typical static and dynamic performances of meshing gears by simulating gears rolling-sliding contact processes using non-linear finite element method. A typical spur gear model has been proposed first for performance analysis and the model with integrated parameters could contribute reliable finite element conditions to simulate actual gear meshing. The bending stress and its resultant stress of contacted teeth with static model and dynamic model have been then simulated and the results can be used to provide information on the contacted teeth stresses distribution. The detailed investigation of transmission error in gear meshing has been carried out to understand harmful noise and vibration of gear set and a micro geometry modification of gear tooth profile has been proposed, i.e. tip relief. The gear contact pressure distributions and transmission errors have been then analyzed with micro geometry modification and the analysis is under static and dynamic boundary conditions. Finally, the most significant contribution of the thesis is the investigation of the frictional effect on dynamic performance, including dynamic stress and transmission errors.

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6

Molokanov, Aleksej. "Design of the high-strength gear steels for use in advanced power transmission for low-emission aero-engines". Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7729/.

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The gear components in the aero-engine transmission system are subjected to very high stresses during service at elevated temperatures. Due to requirements of increasing power take-off and weight reduction further improvements in the high-strength gear steel are needed. The aim of this project was to design a new steel composition to give an increase in the core strength by 10 % compared to the currently used BS S 156 high-strength gear steel and increase the material capability to withstand higher operating temperatures of up to 300 oc. In addition to this, it was required that the new steel should also have similar or higher ductility, fracture and impact toughness, fatigue and wear resistance to the current steel, with minimal changes being allowed to the current heat treatment schedule. A final requirement was that the design process should also consider minimising the cost of the new steel composition through reducing the use of expensive alloying elements.

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Miyasato, Hugo Heidy 1986. "Simulação do fenômeno de gear rattle em modelos de trem de potência automotivos". [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263727.

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Orientador: Milton Dias Junior
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: Fenômenos de ruído, vibração e sua severidade (NVH) são uma grande preocupação da indústria automotiva desde o século 20. A fim de atingir uma vantagem competitiva, as montadoras têm se focado na melhora do desempenho de NVH dos seus produtos para lidar com um cenário de mercado global competitivo. No intuito de verificar o comportamento do sistema durante o processo de desenvolvimento, métodos computacionais são aplicados para encontrar melhores abordagens e na previsão de problemas, economizando tempo e orçamento da empresa gastos na construção de protótipos e testes. Nesse trabalho, gear rattle, um ruído induzido por impacto cuja causa são as engrenagens sem carga da transmissão, será modelado e simulado. É diagnosticado com maior intensidade em veículos com motores diesel em marcha lenta e excitado especificamente quando uma faixa de frequências que causa grande amplitude de vibração nos elementos internos da caixa de câmbio é alcançada. Modelos lineares do trem de potência em ponto morto ou em tração serão estudados, compreendendo as suas características básicas, tais como frequências naturais e modos associados que podem ser representativos do fenômeno. Esse sistema possui elementos com fortes não-linearidades, tais como a rigidez estratificada com histerese da embreagem e a folga entre os dentes dos engrenamentos. Uma caracterização mais realista será incluída no modelo com uma rigidez variante no tempo para o engrenamento helicoidal, utilizado em todas transmissões manuais, com uma componente dissipativa adequada aos impactos. Para verificar condições de operação que podem somente ser avaliadas segundo formulação não-linear, simulações serão realizadas para verificar a eficácia de orientações de solução e propostas de modificação encontradas na literatura
Abstract: Noise, Vibration and Harshness (NVH) phenomena are a great concern of the automotive industry since the twentieth century. In order to achieve a commercial advantage, manufacturers have focused on improving the NVH performance of their products to cope with a competitive global market scenario. To verify the behavior of the system during the design process, computational methods are applied to find a better approach and foresee problems, saving company budget and time spent in prototypes and tests. In this work, gear rattle, a impact-induced noise caused by the unloaded gear teeth inside the gearbox, will be modeled and simulated. It is diagnosed with a higher intensity in diesel vehicle engines at idle speed and in a more specific way excited when a range of frequency that causes large amplitude of vibration in the internal elements of the gearbox is reached. Linear models of the powertrain operating in idle and traction will be studied, in order to understand its basic characteristics, such as natural frequencies and associated vibration modes that could be representative to this phenomena. This system has elements with strong nonlinearities such as the stratified stiffness with hysteresis of the clutch and the backlash between the gear teeth. A more realistic feature will be included in the model with a time variable stiffness for the helical gear mesh, used in all manual transmissions, with a suitable dissipative component for the impacts. To verify operational conditions which can only be evaluated with nonlinear formulation, simulations will be made to verify the effectiveness of solution guidelines and modification procedures found in literature
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica

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Kroger, Detlev G. "Air-cooled heat exchangers and cooling towers : thermal-flow performance evaluation and design". Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49822.

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Thesis (PhD)--Stellenbosch University, 2004.
ENGLISH ABSTRACT: During the last 30 years I have been involved in the theory and practice of thermal engineering and in particular, in the areas of air-cooled heat exchangers and cooling towers for the power, refrigeration, process and petrochemical industries in South Africa and internationally. During this period, I have authored and co-authored more than 120 papers that were published in technical journals or presented at conferences nationally or internationally. Most of these papers are included in a manuscript entitled "Air-cooled Heat Exchangers and Cooling Towers", in which Ipresent a systematic approach to the thermal performance evaluation and design of industrial air-cooled heat exchangers and cooling towers. This original publication also includes the relevant practice applicable to the design of cooling systems, based on my experience as a consultant to industry. Design offices throughout the world presently follow our design methods, or at least employ many of our research results. Our work has furthermore contributed to the development of improved cooling system designs (e.g. new dephlegmator header designs), components (e.g. single-row flattened finned tubes) and product improvement and quality control (e.g. performance testing and measurement of thermal contact resistance between fin and tube during production). Many of our research findings have found application in the modification of existing cooling systems. The manuscript has also been used as reference work during the presentation of short courses to practising engineers and consultants in industry and to engineering graduates at the University of Stellenbosch. A two-volume edition of this manuscript was published by PennWell Corp., Tulsa, Oklahoma, USA in 2004.
AFRIKAANSE OPSOMMING: Gedurende die laaste 30 jaar was ek betrokke by die teorie en praktyk van lugverkoelde warmteoordraers en koeltorings vir die kragopwekkings-, verkoelings-, proses- en petro-chemiesenywerhede in Suid-Afrika sowel as in die buiteland. Gedurende hierdie periode was ek outeur en mede-outeur van meer as 120 publikasies wat in tegniese tydskrifte, of by plaaslike of oorsese konferensies aangebied is. Die meeste van hierdie publikasies vorm deel van 'n manuskrip getiteld "Air-cooled Heat Exchangers and Cooling Towers" waarin ek 'n sistematiese benadering tot die bepaling van die termiese vermoë en ontwerp van industriële lugverkoelde warmteoordraers en koeltorings aanbied. Hierdie oorspronklike publikasie bevat ook die relevante praktyk wat van toepassing is op verkoelingsaanlegte. Ontwerpkantore wêreldwyd volg tans hierdie ontwerpsmetodes, of gebruik ten minste baie van ons navorsingsresultate. Ons werk het verder bygedra tot die ontwikkeling van verbeterde verkoelingsaanlegte (bv. nuwe deflegmatore), komponente (bv. enkelbuisry platvinbuise ) en verbeterde produkte en kwaliteitskontrole (bv. toetsing van verkoelingsvermoë oftermiese kontakweerstand tussen vin en buis gedurende produksie). Baie van ons bevindinge het toepassing gevind in die modifikasie van verkoelingsaanlegte. Die manuskrip is ook as verwysing gebruik gedurende die aanbieding van kort kursusse aan ingenieurs in die praktyk en aan nagraadse studente aan die Universiteit van Stellenbosch. 'n Twee-volume uitgawe van die manuskrip is deur PennWell Corp., Tulsa, Oklahome, VSA in 2004 gepubliseer.

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Roldão, Perestrelo Leandro Tadeu. "Modelagem do trem de potência automotivo para estudo de trepidação (Judder)". [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263756.

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Orientador: Milton Dias Junior
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: O resumo poderá ser visualizado no texto completo da tese digital
Abstract: The abstract is available with the full electronic document
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica

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Maurice, Franck. "Intégration et mise en oeuvre de plans d’expériences numériques en modélisation et simulation système : étude de cas en ingénierie et dimensionnement des composants hydrauliques de puissance". Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2538.

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Cette thèse s'inscrit dans le cadre d'une Convention Industrielle de Formation par la Recherche (CIFRE) issue du partenariat entre le laboratoire Roberval de l'Université de Technologie de Compiègne et l'entreprise HYDRO LEDUC. Cette dernière fabrique et conçoit des composants hydrauliques tels que des pompes et moteurs à pistons, des accumulateurs, des vérins, mais aussi des outils spécifiques destinés à des applications diverses et variées. La discipline de l'hydraulique de puissance est omniprésente dans de nombreuses applications industrielle. Elle constitue une solution incontournable pour toutes les utilisations qui nécessitent des puissances élevées. Elle touche ainsi de nombreux domaines d'activité tels que les transports, l'aéronautique, les machines-outils, le BTP et bien d'autres. Les circuits hydrauliques, que ce soit en termes d'entrainement ou de contrôle, présentent de nombreux avantages. IIS permettent entre autre de transmettre des efforts considérables, garantissent un contrôle précis des récepteurs qu'ils soient linéaires ou rotatifs, et ont une durée de vie élevée. Les pompes hydrauliques sont le véritable cœur de tous les circuits hydrauliques. Dotées d'une puissance massique inégalable, elles sont capables de travailler à des hautes pressions tout en conservant un haut rendement global. Les contraintes environnementales ainsi que l'augmentation du prix de l'énergie font croître la demande en composants toujours plus performants. Afin de rester compétitif, les fabricants sont contraints de répondre à ces exigences tout en contrôlant leurs coûts de développement et production. La méthode conventionnelle d'amélioration des produits basée sur des cycles essais/erreurs est une démarche financièrement coûteuse et chronophage. Les vingt dernières années ont vu la puissance de calcul des ordinateurs croître de manière exponentielle, faisant de la simulation numérique un véritable outil de compréhension des phénomènes physiques et d'amélioration des produits. L'enjeu de notre travail consiste à s'approprier et à analyser les multiples données et savoirs théoriques issues de nombreuses années de travaux de recherche. A partir de ce socle de connaissances, l'objectif est de mettre au point une méthode de conception mettant en oeuvre la démarche des plans d'expériences et reposant sur la modélisation ainsi que sur la simulation dans la conception intégrée de composants hydrauliques. Cette dernière a été appliquée à une pompe à pistons axiaux à cylindrée variable. En effet, associée à des stratégies de conception dûment établies, la simulation numérique permet de réduire considérablement les temps de développement et d'amélioration des produits tout en diminuant de manière drastique le nombre d'essais expérimentaux
This thesis has been achieved as part of the partnership between HYDRO LEDUC company and Roberval laboratory located at the "Université de Technologie de Compiègne". HYDRO LEDUC designs and makes hydraulic components such as piston pumps and motors, accumulators, cylinders and specific tools reserved for varied applications. A large amount of applications uses fluid power transmission. Indeed, because of its high power density, hydraulic solutions are unavoidable. Thus, this latter is present in various fields such as transport, aeronautical, machine tool, building industry and many others. Hydraulic circuits allow delivering considerable efforts. They enable a very accurate control of receptors and ensure a high life time to systems and components. Hydraulic pumps can be considered as the heart of every hydraulic systems. Their matchless high power density makes them to perform at high pressure while keeping a high efficiency level. Environment constraints, energy cost rise and global market have led manufacturers to make products more efficient while decreasing their manufacturing and development costs. Conventional design methodology relies on test/error cycles, which is a development strategy that can be expensive and time consuming. Computing power of computers have been increasing sharply over the last 20 years. In that sense, numerical simulation has become the mainstream in terms of design, research and development and physical analysis. The objective of our work is to gather, and analyse data and theoretical knowledge stem from many years of research investigations. From this point, the second goal of our work is to choose and develop a design strategy, which employs Design of Experiments method, and relying on numerical modelling and simulation applied to hydraulic components. This latter has been applied to a variable displacement axial piston pump. Hence, performing a design strategy that integrates Design of Experiments, numerical simulation and modelling for hydraulic components leads to reduce considerably the time and the cost of the design process

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Libros sobre el tema "Clutches (Machinery) Power transmission"

1

Hester, Edward. Industrial clutches, brakes & related power transmission components. Cleveland, Ohio: Freedonia Group, 2002.

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2

Hayes, Teresa L., Michael A. Deneen y David D. Weiss. Industrial clutches & brakes & related power transmission components. Cleveland, OH: Freedonia Group, 1998.

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3

Electric energy conversion and transmission. New York: Macmillan, 1985.

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Vulʹfson, I. I. Vibroaktivnostʹ privodov mashin razvetvlennoĭ i kolʹt͡s︡evoĭ struktury. Leningrad: "Mashinostroenie," Leningradskoe otd-nie, 1986.

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Vulʹfson, I. I. Vibroactivity of branched and ring structured mechanical drives. Editado por Rivin Eugene I. New York: Hemisphere Pub. Corp., 1989.

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6

International Conference on Machinery, Materials Science and Energy Engineering (3rd 2015 Wuhan, China). Machinery, materials science and energy engineering (ICMMSEE2015): Proceedings of the 3rd international conference. New Jersey: World Scientific, 2015.

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7

Antriebstechnisches Kolloquium '93 (1993 Aachen, Germany). Antriebstechnisches Kolloquium '93: Industrieentwicklungen und Forschungsergebnisse für die Maschinenüberwachung und die Konstruktion in der Antriebstechnik. Köln: Verlag TÜV Rheinland, 1993.

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Paper Machine Drives Short Course (1993 Nashville, Tenn.). 1993 Paper Machine Drives Short Course: Opryland Hotel, Nashville, Tennessee, March 23-26. Atlanta, GA: TAPPI Press, 1993.

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Paper Machine Drives Short Course (1991 Atlanta, Ga.). 1991 Paper Machine Drives Short Course: Hyatt Regency Atlanta, Atlanta, GA, March 18-21. Atlanta, GA: TAPPI Press, 1991.

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10

Alberto, Regattieri, Pham Hoang, Ferrari Emilio y SpringerLink (Online service), eds. Maintenance for Industrial Systems. London: Springer-Verlag London, 2010.

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Capítulos de libros sobre el tema "Clutches (Machinery) Power transmission"

1

"Synchronous Machinery". En Electric Power Generation, Transmission, and Distribution, 55–62. CRC Press, 2007. http://dx.doi.org/10.1201/9781420009255-11.

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Nippes, Paul I. "Synchronous Machinery". En Electric Power Generation, Transmission, and Distribution: The Electric Power Engineering Handbook, 6–1. CRC Press, 2018. http://dx.doi.org/10.1201/9781315222424-6.

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"Chapter 14. Power transmission couplings: select the best configurations". En Fluid Machinery, 129–34. De Gruyter, 2020. http://dx.doi.org/10.1515/9783110674156-014.

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"CHAPTER IX. HYDRAULIC TRANSMISSION OF POWER IN MINES." En THE PRINCIPLES, CONSTRUCTION, AND APPLICATION OF PUMPING MACHINERY (STEAM AND WATER PRESSURE) With Practical Illustrations of Engines and Pumps applied to Mining, Town Water Supply, Drainage of Lands, etc. ; also Economy and Efficiency Trials of Pumping Machinery., 159–78. Thomas Telford Publishing, 2011. http://dx.doi.org/10.1680/tpcaaopmsawp.52505.0009.

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"Power Transmission Gears* *By James R. Partridge, Chief Engineer, Gear Division, Lufkin Industries, Inc., Lufkin, Texas. Reprinted by permission." En Practical Machinery Management for Process Plants, 225–309. Elsevier, 1997. http://dx.doi.org/10.1016/s1874-6942(97)80008-9.

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Parey, Anand y Amandeep Singh Ahuja. "Application of Artificial Intelligence to Gearbox Fault Diagnosis". En Handbook of Research on Generalized and Hybrid Set Structures and Applications for Soft Computing, 536–62. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9798-0.ch024.

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Gearboxes are employed in a wide variety of applications, ranging from small domestic appliances to the rather gigantic power plants and marine propulsion systems. Gearbox failure may not only result in significant financial losses resulting from downtime of machinery but may also place human life at risk. Gearbox failure in transmission systems of warships and single engine aircraft, beside other military applications, is unacceptable. The criticality of the gearbox in rotary machines has resulted in enormous effort on the part of researchers to develop new and efficient methods of diagnosing faults in gearboxes so that timely rectification can be undertaken before catastrophic failure occurs. Artificial intelligence (AI) has been a significant milestone in automated gearbox fault diagnosis (GFD). This chapter reviews over a decade of research efforts on fault diagnosis of gearboxes with AI techniques. Some of areas of AI in GFD which still merit attention have been identified and discussed at the end of the chapter.

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Parey, Anand y Amandeep Singh Ahuja. "Application of Artificial Intelligence to Gearbox Fault Diagnosis". En Intelligent Systems, 2087–113. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-5643-5.ch093.

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Gearboxes are employed in a wide variety of applications, ranging from small domestic appliances to the rather gigantic power plants and marine propulsion systems. Gearbox failure may not only result in significant financial losses resulting from downtime of machinery but may also place human life at risk. Gearbox failure in transmission systems of warships and single engine aircraft, beside other military applications, is unacceptable. The criticality of the gearbox in rotary machines has resulted in enormous effort on the part of researchers to develop new and efficient methods of diagnosing faults in gearboxes so that timely rectification can be undertaken before catastrophic failure occurs. Artificial intelligence (AI) has been a significant milestone in automated gearbox fault diagnosis (GFD). This chapter reviews over a decade of research efforts on fault diagnosis of gearboxes with AI techniques. Some of areas of AI in GFD which still merit attention have been identified and discussed at the end of the chapter.

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8

Gordon, Robert B. y Patrick M. Malone. "Wood and Water". En The Texture of Industry. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195058857.003.0009.

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The early Spanish adventurers came to America primarily to mine precious metals. Some colonists in eastern North America also had hopes of finding gold and silver, but more turned to the abundant timber and water resources of the New World and undertook lumbering and ironmaking to produce goods for export to the mother country. Through the next 200 years, most American industrial entrepreneurs used energy from wood and from flowing water. Water was a renewable resource, while wood was so abundant that new sources were easily found when a local supply was depleted. The years in which wood had a dominant place in American technology have been described by historian Brooke Hindle as “America’s Wooden Age”; on much of the continent, metal was used only where wood would not serve, as in nails, gun barrels, and cooking pots. Iron was the only metal made in significant quantities in North America during the Wooden Age. Settlers along the American coast reached the roadless interior by ascending the numerous rivers and, until well into the nineteenth century, preferred to move heavy or bulky cargoes by boat or raft. They used the flow and drop of water in streams as their principal source of mechanical power for industry, and only after 1870 did Americans generate more power with steam engines than with waterwheels.” Visitors to Old Sturbridge Village, a living-history museum in Massachusetts that re-creates community life in the early years of the nineteenth century, find wooden buildings, tools made of wood and iron, the smell of wood smoke, and machinery powered by waterwheels. Along the east coast, wood, water in lakes and streams, and iron ore were abundant but had to be used near where they were found until entrepreneurs with access to capital and technological expertise built canals, railways, and, later, electrical power-transmission systems. A craftsman who started a shop with human-powered machinery in town and subsequently wanted to use water power often had to move to a rural site. As more people did this, they spread manufacturing over the landscape or the Northeast.

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Actas de conferencias sobre el tema "Clutches (Machinery) Power transmission"

1

Yin, Huabing, Jingling Fan, Lichen Hu y Xiaofneg Ma. "Automatic Gearshift Algorithm and Its Dynamic Performance Simulation of Tracked Vehicle With Integrated Power Train System". En ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15842.

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The automatic gearshift algorithm and its dynamic control is an important research area in tracked vehicle design. In the paper the models of power train system such as engine, transfer gearbox, hydraulic torque converter, planetary gearbox, running gear propulsion system and virtual terrain are built. The program for gearshift algorithm design is developed. The model of designed gearshift algorithm is developed with MATLAB/simulink and finite state machine theory. The hydraulic control system is modeled with MATLAB/simulink and the oil pressures can be applied on the clutches and brakes of power train system. The planetary gearbox and other transmission parts are modeled through EASY5 power train library models and the gear contact stiffness, torsional stiffness of links between planetary gear sets and shafts are taken into consideration. The running gear system model are built with ADAMS, and the terrain loads from the interaction between terrain and tracks are applied on the sprocket extended to the power train, which considers the dynamic contacts among road wheel, track and terrain. Many terrain models including the slope, obstacle and road model with A, B, C, D etc. levels at different vehicle speeds can be built and integrated with the virtual prototyping models These different disciplinary models are integrated with MATLAB, ADAMS and EASY5 development environment and the virtual test can be done in various operation conditions. The integrated method is through the interfaces provided by these simulation software. It realizes the time synchronization between two different models of EASY5 and MATLAB/simulink with the digital electric circuit theory. The virtual test is been made in the integrated MATLAB/simulink development environment. The tracked vehicle's acceleration performance is simulated. The acceleration time from second gear to 32 km/h is about 14.5 seconds. Many other performances such as the virtual dynamic torque loads of rotating parts, the clutch torque capacity and the jerks of any parts in the power train can be obtained from simulation and can be verified with the physical tests later. There are some innovations in modeling method in this paper. Firstly, it builds many subsystem models with the virtual prototyping technology. Secondly, it builds the integration environment and interfaces. Many models of different areas are integrated to simulate transmission gearshift process. Thirdly, it provides a modeling method and environment for power train modeling and simulation. Fourthly, the acceleration performance of a tracked vehicle is simulated and the two results of virtual and physical tests are close.

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2

Dogan, O., F. Karpat, N. Kaya, C. Yuce, M. O. Genc y N. Yavuz. "Optimum Design of Tractor Clutch PTO Finger by Using Topology and Shape Optimization". En ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52008.

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Tractors are one of the most important agricultural machinery in the world. They provide agricultural activities in challenging conditions by using various agricultural machineries which are added on them. Therefore, there has been a rising demand for tractor use for agricultural activities. During the power transmission, tractor clutches are exposed to high static and cyclic loading directly. Thus, most of clutch parts fail before completing their design life which is under 106 cycles. Especially, because of the high stress, there are a number of fractures and breakages are observed around the pin area of the finger mechanisms. Due to these reasons, it is necessary to re-design these fingers by using modern optimization techniques and finite element analysis. This paper presents an approach for analysis and re-designs process of tractor clutch PTO finger. Firstly, the original designs of the PTO fingers are analyzed by using finite element analysis. Static structural analyses are applied on these fingers by using ANSYS static structural module. The boundary conditions are determined according to the data from the axial fatigue test bench. Afterwards, the stress-life based fatigue analyses are performed with respect to Goodman criterion. It is seem that the original design of the PTO finger, failed before the design life. Hence, the PTO finger is completely re-designed by using topology and shape optimization methods. Topology optimization is used to find the optimum material distribution of the PTO fingers. Topology optimization is performed in solidThinking Inspire software. The precise dimensions of the PTO fingers are determined by using shape optimization and response surface methodology. Two different design parameters, which are finger thickness and height, are selected for design of experiment and 15 various cases are analyzed. By using DOE method three different equations are obtained which are maximum stresses, mass, and displacement depending on the selected design parameters. These equations are used in the optimization as objective and constraint equations in MATLAB. The results indicate that the proposed models predict the responses adequately within the limits of the parameters being used. The final dimensions of the fingers are determined after shape optimization. The new designs of the PTO fingers are re-analyzed in terms of static and fatigue analysis. The new design of the PTO finger passed the analysis successfully. As a result of the study, the finger mass is increased 7% but it is quite small. Maximum Equivalent Von-Misses stress reduction of 25.3% is achieved. Fatigue durability of the PTO finger is improved 53.2%. The rigidity is improved up to 27.9% compared to the initial design. The optimal results show that the developed method can be used to design a durable, low manufacturing cost and lightweight clutch parts.

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Ma, Yuncong. "Application of wireless power transmission technology". En ADVANCES IN MATERIALS, MACHINERY, ELECTRONICS III: 3rd International Conference on Advances in Materials, Machinery, Electronics (AMME 2019). Author(s), 2019. http://dx.doi.org/10.1063/1.5090695.

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Vavrek, Edward M. "Computer-Aided Power Requirements". En ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41332.

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The power requirement of machinery is a necessary consideration for the sizing and selection of machine elements in the design process. The decision process of designing gears, belt drives, clutches, brakes, and bearings are designed and sized based on the power requirement of the application. I have written a software program that calculates the power requirements for three different design applications. This software program simplifies and streamlines the design and selection process by allowing the student to calculate the horsepower and torque requirement.

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5

Szabo, Tomas, Michael Buchholz y Klaus Dietmayer. "Optimal Control of a Gearshift With a Dual-Clutch Transmission". En ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6028.

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This paper presents a model for a heavy duty truck powertrain test rig with a dual-clutch transmission. For this powertrain model, an LQR controller is designed to compute the torque profiles for performing powershifts while both clutches are slipping. Since most of the system states are not measurable, a Kalman-Bucy filter is implemented to estimate the states. The controller and estimation performance will be discussed in detail using both simulation and measurement results.

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6

Guo Xinhua, Wen Xuhui, Chen Jingwei, Zhao Feng y Guo Xizheng. "Simulation of an electrical variable transmission based on dual mechanical ports electric machine with clutch". En 2008 IEEE Vehicle Power and Propulsion Conference (VPPC). IEEE, 2008. http://dx.doi.org/10.1109/vppc.2008.4677476.

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Hendry, Morgan L. y Nicholas Bellamy. "Advantages and Experience of Using SSS (Synchro-Self-Shifting) Clutches in Hybrid Propulsion Such As CODELOG or CODELAG Naval Marine Systems". En ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91873.

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Abstract Hybrid marine ship propulsion systems are currently being used, and many more are being considered worldwide, including for commercial ships as well as for navies worldwide. These hybrid propulsion systems offer extended ship range and potentially quiet operation with propulsion on propeller shaft line electric motors. When high power and / or speed may be required, the main engines or turbines can be quickly started, and propeller shaft line clutches provide quick and reliable transition from or back to the electric motors. In the naval marine sector, several ship programs currently use “Combined Diesel Electric or Gas Turbine” (CODELOG) or “Combined Diesel Electric and Gas Turbine” (CODELAG) propulsion. Some utilize Synchronous Self-Shifting Clutches, and some utilize other types of non-automatic friction clutches. Many navies worldwide are considering this type of hybrid propulsion, but variations in machinery arrangements and components can result in significant differences in fuel efficiency, weight, space, first time cost, ship performance, and propulsion machinery lifecycle maintenance with associated cost. Therefore, serious investigation of the alternatives early in the ship design phase is important and accessing the experience of these existing systems with these components is vital, before settling on a machinery arrangement and its components for a future ship program. As the old cliché says, “The Devil is in the Details!” Like any system, the success, the reliability, and the ultimate capability often come down to design details and the components chosen. Naval ships are designed to operate, even when damaged or when control or oil supply systems fail. Simplicity and the ability to improvise is often the key to mission success or failure. Synchronous Self-Shifting Clutches, or SSS Clutches, have proven to be “fit and forget” in these propulsion systems, have performed without fail in battle conditions, and this paper will describe the systems, explore the alternatives for propulsion clutches, provide advantages and disadvantages, and will provide experience of SSS Clutches in hybrid propulsion systems.

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Liu, Dandan, Xiaodong Zhang y Fei Jia. "Characteristic Analysis of Wireless Power Transmission System Based on Mutual Inductance Parameters". En Advances in Materials, Machinery, Electrical Engineering (AMMEE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/ammee-17.2017.160.

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Hendry, Morgan L. "Application and Experience of the SSS (Synchro-Self-Shifting) Clutch for High Speed Gas Turbine Marine Propulsion Systems". En ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75869.

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Synchro-Self-Shifting (SSS) Overrunning Clutches are used in a myriad of propulsion system configurations for naval and commercial vessels powered by gas turbines and/or combined gas turbine and cruise engines worldwide. Of these, much has been written about high power gas turbine propulsion clutches for large naval vessels (frigates, destroyers, cruisers, etc.), whereas less has been published about the application and experience of the propulsion machinery with Synchro-Self-Shifting Clutches for hydrofoils, hovercraft, fast patrol boats, fast ferries, yachts, etc. Space, weight, and high-speed constraints can be different for high speed gas turbine propulsion systems used in these smaller types of vessels, and can therefore provide gearing challenges, including system design challenges for these clutches. A comparison between Synchro-Self-Shifting overrunning clutches and other types of freewheels will be given discussing the advantages and disadvantages of each, particularly as they relate to high speed gas turbine marine propulsion applications. Lastly, this paper will give some history of a number of high speed gas turbine driven marine propulsion applications with clutches from the early 1960’s until the present, describe various gearing arrangements that were used in particular vessels, articulate where these clutches are incorporated, and discuss the application experience of these clutch installations.

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Li, Wenfeng, Hongkun Bai, Wei Liu, Yongmin Liu, Yubin Mao Wang, Jiangbo Wang y Dandan He. "Short-term electric power demand forecasting based on economic-electricity transmission model". En ADVANCES IN MATERIALS, MACHINERY, ELECTRONICS II: Proceedings of the 2nd International Conference on Advances in Materials, Machinery, Electronics (AMME 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5033836.

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