Relevant bibliographies by topics / External Gear Machine

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'External Gear Machine'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 January 2023

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Journal articles on the topic "External Gear Machine"

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Sakaridis, Emmanouil S., Georgios D. Ntourmas, Stavros D. Athanasopoulos, and Angelos P. Markopoulos. "A mathematically assisted methodology for the experimental calculation of the internal gear ratios to extend the lifecycle of a hobbing machine." International Journal of Mechanical Engineering Education 46, no. 1 (2017): 50–63. http://dx.doi.org/10.1177/0306419017715425.

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Manufacturing of gears can be achieved with various methods, including the cutting of gears in a hobbing machine. The function of such a machine tool is based on a combination of timing gears which synchronize all moving components accurately. Variations in the synchronization, which alter the geometric features of the gear being cut, are achieved via external gearboxes with interchangeable gears. Thus, precise knowledge of the change gears that correspond to the desired gear geometry is essential in order to operate the machine tool properly. The hobbing machine examined in this paper had rem
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Li, Ke, Bo Yu, Zhaoyao Shi, Zanhui Shu, and Rui Li. "Development of gear dynamic performance testing machine." International Journal of Metrology and Quality Engineering 12 (2021): 20. http://dx.doi.org/10.1051/ijmqe/2021017.

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With the development of gears towards high temperature, high pressure, high speed and high stress, gear measurement, in which only the static geometric accuracy is considered, is unable to meet the current application requirements. While, the low precision and single function gear tester constrains the measurement of gear dynamic performance. For the resolution of this problem, based on the principle of gear system dynamics and several precision mechanical design techniques, a gear dynamic testing machine has been developed, providing new instruments for gear testing. On the basis of research
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Manring, Noah D., and Suresh B. Kasaragadda. "The Theoretical Flow Ripple of an External Gear Pump." Journal of Dynamic Systems, Measurement, and Control 125, no. 3 (2003): 396–404. http://dx.doi.org/10.1115/1.1592193.

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In this paper, the theoretical flow ripple of an external gear pump is studied for pumps of similar size using different numbers of teeth on the driving and driven gears. In this work, the flow ripple equation is derived based upon the flow of incompressible fluid across the changing boundaries of a control volume. From this method, it is shown that the instantaneous length of action within the gear mesh determines the instantaneous flow ripple. A numerical and a closed-form approximation are presented for the instantaneous length of action and it is shown that the difference between these two
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Kurokawa, Syuhei, Yuuki Utsunomiya, Terutake Hayashi, Tetsuya Taguchi, and Ryota Matsuoka. "Whole outline scanning measurement of internal gear by using CNC gear measuring machine." MATEC Web of Conferences 287 (2019): 08001. http://dx.doi.org/10.1051/matecconf/201928708001.

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A three-dimensional probe is mounted on a specialized gear measuring machine whose measurement target is limited on the working flanks. The newly developed measuring machine has a coordinate measuring mechanism, aiming to be a highly versatile and relatively inexpensive measuring machine. According to our previous research, in addition to the working tooth surface, shape data of the root, bottom and tip profiles can be acquired with a single measurement operation. However, the target object for which this developed method has been applied was only the external cylindrical gear. In this paper,
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Yujing, Zhang, Meng Zhuo, and Sun Yize. "Dynamic Modeling and Chaotic Analysis of Gear Transmission System in a Braiding Machine with or without Random Perturbation." Shock and Vibration 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/8457645.

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This paper is aimed at analyzing the dynamic behavior of the gear transmission system in a braiding machine. In order to observe the nonlinear phenomenon and reveal the time-varying gear meshing mechanism, a mathematical model with five degrees-of-freedom gear system under internal and external random disturbance of gear system is established. With this model, bifurcation diagrams, Poincare maps, phase diagrams, power spectrum, time-process diagrams, and Lyapunov exponents are used to identify the chaotic status. Meanwhile, by these analytical methods, spur gear pair with or without random per
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Liu, Zhitao, Qian Tang, Xianguang Li, Zheng Zou, and Yong Yang. "A method for thermal characteristics modelling of hob assembly on dry hobbing machine." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 7 (2018): 2262–74. http://dx.doi.org/10.1177/0954406218784619.

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Gear hobbing is the use of machinery to manufacture external gears. With the booming motor industry, there are more requirements for gear hobbing accuracy than ever before. Thermal error – as a major source of error in a dry hobbing machine – must be effectively compensated to achieve accuracy. Thus, studies on the thermal error of hob assembly are important both in theory and practice. This paper discusses the development of a valid numerical modelling method for the hob assembly of a dry hobbing machine. The equations used to determine the values of heat sources and heat transfer coefficient
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Wu, Yu Ren, and Van The Tran. "Lead Crowning and Anti-Twist for Tooth Flank of a Heat Treated Helical Gear on Internal CNC Honing Machine." Applied Mechanics and Materials 799-800 (October 2015): 554–59. http://dx.doi.org/10.4028/www.scientific.net/amm.799-800.554.

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The internal gear honing is more popular than the external gear honing by its advantages such as higher contact surface and easier correct profile errors. It is usually applied for modifying the gear surface to compensate for the distortions after heat treatment process. However, the lead crowning and anti-twist tooth flank of a helical gear on internal CNC gear honing has not studied yet. Therefore, a novel method for lead crowning tooth flank of work gear surfaces is proposed by using a linear swivel angle function of the honing wheel and a variable pressure angle (VPA) honing wheel is also
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Ohrimenko, Oleksandr, Oleksandr Oleksandrovych Klochko, Olena Volodimirivna Naboka, Alexandr Sergeevich Strіlec, and Volodymyr Ivanovych Gorbulyk. "EXPANDING THE TECHNOLOGICAL CAPABILITIES OF MACHINES FOR CUTTING BEVERED WHEELS WITH CIRCULAR TOOTH WITH INCREASED OUTER TONE DISTANCE." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 1 (July 28, 2022): 74–79. http://dx.doi.org/10.20998/2079-004x.2022.1(5).10.

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Considered in the article. expansion of technological capabilities of machine tools mod. 528С for cutting bevel gears with a circular tooth with an increased outer taper distance of the gears with a crossing angle of 300. Optimizing programs are analyzed to determine the geometric parameters with obtaining the localization of the contact zone in height, for the tooth shape III, even on a machine tool without tilting the tool, and in the presence of a machine with the inclination of the tool spindle, widely apply the double-double-sided cutting method for a wide range of bevel and hypoid gears,
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Opperwall, Timothy, and Andrea Vacca. "A combined FEM/BEM model and experimental investigation into the effects of fluid-borne noise sources on the air-borne noise generated by hydraulic pumps and motors." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 3 (2013): 457–71. http://dx.doi.org/10.1177/0954406213486591.

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A common assumption about fluid power systems is that the outlet pressure ripple is a primary source for air-borne noise. Fluid pressure fluctuations are caused by flow ripples generated by positive displacement units that are the prime power movers in these systems. The present research aims to leverage previous efforts in the topic of noise generation in hydrostatic units, formulating a method to predict air-borne noise for a particular reference machine. A numerical model has been developed to gain knowledge on the mechanisms of noise generation in external gear machines. The simulated nois
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Luo, Chun-lei, Xin Mo, Jin-yang Li, Zhi-qing Tang, and Song-song Huang. "Coupling Synchronization Criterion of Two Hydraulic Motors in an Eccentric Rotary Vibration Machine." Shock and Vibration 2019 (January 20, 2019): 1–11. http://dx.doi.org/10.1155/2019/6086874.

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In an eccentric rotating system driven by two hydraulic motors without synchronous gears, vibration coupling may help render motion stable. In order to investigate how vibration coupling influences the motion, the coupling characteristics of the vibration system were studied regarding the differences between two motors such as leakage network, coulomb damping network, and pressure loss network, and the sensitivity of the influence factors was also studied. The influence of tiny differences between the two motors, tiny differences in the motion pair structure, in the oil temperature and in the
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Dissertations / Theses on the topic "External Gear Machine"

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Gulati, Sidhant, Andrea Vacca, and Manuel Rigosi. "A General Method to Determine the Optimal Profile of Porting Grooves in Positive Displacement Machines: the Case of External Gear Machines." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199832.

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In all common hydrostatic pumps, compressibility affects the commutation phases of the displacing chambers, as they switch their connection from/to the inlet to/from the outlet port, leading to pressure peaks, localized cavitation, additional port flow fluctuations and volumetric efficiency reduction. In common pumps, these effects are reduced by proper grooves that realizes gradual port area variation in proximity of these transition regions. This paper presents a method to automatically find the optimal designs of these grooves, taking as reference the case of external gear pumps. The propos
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(8776251), Rituraj. "Numerical Methodologies for Modelling the Key Aspects Related to Flow and Geometry in External Gear Machines." Thesis, 2020.

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External gear machines (EGMs) are used in a variety of industries ranging from fluid power machinery to fluid handling systems and fuel injection applications. Energy efficiency requirements and new trends in hydraulic technology necessitate the development of novel EGMs optimized for efficiency and reliability in all of these applications. A crucial piece in the novel EGM development process is a numerical model that can simulate the operation of EGM and predict its volumetric and hydro-mechanical performance.<div><br></div><div>The EGM simulation models developed in the past have focused mos
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(9746363), Thomas Ransegnola. "A Strongly Coupled Simulation Model of Positive Displacement Machines for Design and Optimization." Thesis, 2020.

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<div>Positive displacement machines are used in a wide variety of applications, ranging from fluid power where they act as a transmission of power, to lubrication and fluid transport. As the core of the fluid system responsible for mechanical--hydraulic energy conversion, the efficiencies of these units are a major driver of the total efficiency of the system. Furthermore, the durability of these units is a strong decider in the useful life of the system in which they operate.</div><div><br></div><div>The key challenge in designing these units comes from understanding their working principles
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Book chapters on the topic "External Gear Machine"

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Egorova, Olga V., Victor V. Panyukhin, Marina V. Samoilova, and Gennady A. Timofeev. "Involute Self-braking Inverse Gears. Geometry of External and Internal Engagement." In Advances in Mechanism and Machine Science. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20131-9_101.

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Martínez, Javier. "Mesh handling for the CFD simulation of external gear pumps." In Positive Displacement Machines. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-816998-8.00012-1.

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Conference papers on the topic "External Gear Machine"

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Devendran, Ram Sudarsan, and Andrea Vacca. "Design Potentials of External Gear Machines With Asymmetric Tooth Profile." In ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4473.

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This paper describes the design, optimization and the performance potentials of external gear machines with asymmetric tooth profiles. Conventionally, the design of these machines is entirely based on symmetric involute profile. A design method has been developed to derive the tooth profiles based on a modified rack-cutter profile which is assumed to be used for manufacturing the gears with asymmetric involute surfaces and trochoidal fillet profiles. The study is based on the simulation tool HYGESim (HYdraulic GEar machines Simulator) which is being developed and has been validated by the auth
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Manring, Noah D., and Suresh D. Kasaragadda. "The Theoretical Flow Ripple of an External Gear Pump." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39327.

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In this paper, the theoretical flow ripple of an external gear pump is studied for pumps of similar size using different numbers of teeth on the driving and driven gears. In this work, the flow ripple equation is derived based upon the flow of incompressible fluid across the changing boundaries of a control volume. From this method, it is shown that the instantaneous length of action within the gear mesh determines the instantaneous flow ripple. Using a numerical solution for the instantaneous length of action, different pump designs are compared. In summary, the results of this study show tha
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Mistry, Zubin, Andrea Vacca, Sujan Dhar, and Manuel Rigosi. "Modeling Fluid Inertia Effects in External Gear Machines Through Lumped Parameter Approach." In BATH/ASME 2022 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/fpmc2022-88101.

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Abstract Lumped parameter modeling is a consolidated technique for analyzing the fluid dynamic behavior of positive displacement machines, owing to their computational swiftness and the ease to integrate other physical domains affecting the operation of the machine. With some very limited exceptions, this modeling technique typically neglects fluid inertia and momentum effects. This paper proposes an approach to study the effects of fluid inertia affecting the pressurization and depressurization of the tooth space volumes of an external gear pump. The approach is based on considering the fluid
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Pellegri, Matteo, and Andrea Vacca. "A CFD-Radial Motion Coupled Model for the Evaluation of the Features of Journal Bearings in External Gear Machines." In ASME/BATH 2015 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/fpmc2015-9540.

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This paper presents an approach for the evaluation of the effects related to the behavior of the journal bearings on the operation of external gear machines (EGMs). In EGMs journal bearings usually support shafts of both gears. The prediction of their instantaneous axis of rotation is a key feature of EGMs, affecting the displacing action of the inter-teeth volumes and the leakages at the tip of each tooth. Past approaches presented in the literature for the evaluation of the radial micro-motions of the gears are based on classic simplified models for the hydrodynamic journal bearings based on
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Schenk, Thomas, Ulrich Uebel, and Friedrich Wo¨lfel. "Coroning: High Performance Gear Honing Without Dressing." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/ptg-48095.

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Gear honing with internally toothed tools was first used as a gear finishing process for improving unfavorable surface conditions of external cylindrical gears after grinding. Stock removal was minimal (less than 0.01 mm) and only dressable tools were used. From the beginning, the multi-directional surface structure created by gear honing was considered beneficial for gear noise performance. But limitations of the early machine and tool technology did not allow for more stock removal. For a long time gear honing represented an additional finishing process, performed after pre-finishing by shav
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Borghi, Massimo, and Barbara Zardin. "Axial Balance of External Gear Pumps and Motors: Modelling and Discussing the Influence of Elastohydrodynamic Lubrication in the Axial Gap." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51632.

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This paper focuses on the analysis of hydraulically balanced external gear pumps, in particular on the lubricating gap between the bushes and the gears. This topic is of key importance for the optimization of the machine efficiency because it both influences the mechanical-viscous friction and the volumetric losses. In this paper the intent is to investigate the role of the elastic deformation of the bushes surfaces, to compare the analysis done with rigid and elastic surfaces and finally to correlate the results with the design of the bushes balancing surfaces. A numerical procedure for the d
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Gessner, Andrzej. "Theoretical Basis of Generation of Face Worm Gear Drive With Duplex Worm." In ASME 8th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2006. http://dx.doi.org/10.1115/esda2006-95519.

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New type of face worm gear drive with double-lead worm is proposed. The advantages of that gear in comparison to contemporary known gears are also mentioned. The shaping process of the face worm gear is carrying out by means of a single point tool. The same insert is used for cutting the duplex worm. Using a single point tool instead of hobbing cutter considerably reduces the manufacturing cost, in which the share of tool production plays the main role. The shaping process is performed on a CNC milling machine with or without additional equipment. Two main methods of shaping depended on settin
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Borghi, M., M. Milani, F. Paltrinieri, and B. Zardin. "The Influence of Cavitation and Aeration on Gear Pumps and Motors Meshing Volumes Pressures." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13735.

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The paper describes the influence of the fluid modeling on cavitation and aeration detection in external gear pumps and motors inter-teeth volumes during the gears meshing process, in order to compare the results coming from the use of different physical models of air release/adsorption and cavitation. A simplified cavitation model is firstly involved, and pressure transients are calculated imposing a pressure cut when the fluid vapor pressure (or the dissolved air partial pressure) is reached. After, assuming an equivalent approach able to involve the vapor phase generation, the cavitation ph
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Han, Wang, Xiaoling Zhang, Xiesi Huang, and Haiqing Li. "A Time-Dependent Reliability Estimation Method Based on Gaussian Process Regression." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-86294.

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This paper presents a time-dependent reliability estimation method for engineering system based on machine learning and simulation method. Due to the stochastic nature of the environmental loads and internal incentive, the physics of failure for mechanical system is complex, and it is challenging to include uncertainties for the physical modeling of failure in the engineered system’s life cycle. In this paper, an efficient time-dependent reliability assessment framework for mechanical system is proposed using a machine learning algorithm considering stochastic dynamic loads in the mechanical s
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Piovesan, Davide, Yuvarajan Arumugam, Corey Jackson, Santhosh Kumar Shanmugam, Adam Restifo, and Kristine Legters. "Gannon Exoskeleton for Arm Rehabilitation (G.E.A.R.)." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50926.

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A low cost continuous passive motion (CPM) machine, the Gannon Exoskeleton for Arm Rehabilitation (GEAR), was designed. The focus of the machine is on the rehabilitation of primary functional movements of the arm. The device developed integrates two mechanisms consisting of a four-bar linkage and a sliding rod prismatic joint mechanism that can be mounted to a normal chair. When seated, the patient is connected to the device via a padded cuff strapped on the elbow. A set of springs have been used to maintain the system stability and help the lifting of the arm. In this work a multi-body simula
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