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Dissertations / Theses on the topic 'An eccentric crank mechanism'

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Published: 4 June 2021

Last updated: 17 February 2022

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1

Mlčoch, Pavel. "Čtyřválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232114.

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This Diploma Thesis is aimed at exploring the potential of offset crankshaft mechanism for four cylinder inline petrol engine in terms of reducing the frictional losses of the piston group. Thesis deals with the influence of eccentricity on kinematics, dynamics and balance of the crank train. Furthermore, specific crankshaft balancing is elaborated and applied on 3D CAD model of the crankshaft. Calculation of fatigue safety factor using the advanced LSA method that takes into consideration the effect of forced torsional vibration and utilizes outputs from the FEA software (ANSYS APDL) is performed as well. Thesis also includes design of two options of rubber torsion damper mounted on the engine belt pulley and the follow-up choosing of the more advisable one.

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2

Faiman, Jiří. "Tříválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231763.

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The first part of this thesis deals with the examination of the eccentricity of the crank mechanism for individual variables kinematics and dynamics of crank mechanism, analyticaly computed in Matlab. Then it compares the different possibilities of balancing moments of inertia forces and propose a specific design chosen for the value of eccentricity. In the second part is designed a model of crankshaft mechanism based on the investigated parameters. These parameters were carried out by structural analysis in Ansys.

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3

Freisleben, Pavel. "Dvouválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232115.

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This thesis deals with forces of the crank mechanism. The aim of this work is to find the right value of the eccentricity of the crank mechanism, which will have a positive effect on the size and course of forces that cause friction losses in the crank mechanism. Next solves this balancing eccentric unit. The last part deals with the design and strength check of the crankshaft considering torsional vibration.

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4

Süttő, Daniel. "Pětiválcový řadový vznětový motor s excentrickým klikovým mechanismem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231456.

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The aim of this thesis is to find out the influence of eccentricity of crank mechanism on the duration of the force between the piston and the cylinder liner. At the same time I wanted to find out its influence on the balance of the whole system. It is important to design the balance for the selected value of the eccentricity and subsequently put through the crank shaft to stress analysis with torsional vibrations. I got so interested in this problem that in addition to the whole topic I designed a torsional vibration damper.

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5

Gregerson, David Lee. "An investigation of chaos in a single-degree-of-freedom slider-crank mechanism." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/16805.

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6

Mauntler, Nathan A. "Kinematic and dynamic behavior of a wearing joint in a crank-slider mechanism." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024958.

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7

Novosád, Ivan. "Šestiválcový řadový vznětový motor s vypínáním válců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417519.

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Master 's thesis deals with design of a drivetrain of six cylinder inline engine with cylinder deactivation for heavy agricultural vehicles. In this thesis were devised various possibilities of crankshaft balancing, the best design solution of counterweight was based on optimization in software Catia. Further, the crankshaft was analysed for force and momentum loading and torsional vibration, based on which, the torsional vibration damper was designed. There were considered several options for cylinder deactivation, which were analysed for finest run of engine and the best thermal distribution. Based on these criteria, the best option was to deactivate 2nd and 5th cylinder. The crankshaft was analysed for the fatigue failure by finite element method. The fatigue failure is the most dangerous case for the crankshaft, the resulting safety factor for this limit state is 3,05.

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8

Bazler, Anthony Lee II. "The Redesign of a Recumbent Tricycle Using a Crank Rocker Mechanism To Increase Power Throughput In FES Cycling." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1607681055373292.

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9

Ong, Chin Guan. "Shaking and Balance of a Convertible One- and Two-Cylinder Reciprocating Compressor." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31433.

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This research involves the study of a one- and two-cylinder convertible reciprocating Freon compressor for air conditioning or refrigeration purposes. The main concern is the reduction of the vibration (noise) caused during the operation of the compressor. Vibration is a main concern when the compressor is shifted from the one-cylinder operation to the two-cylinder operation mode and the reverse of this shift. The objectives for this research are (1) to investigate the shaking force due to the reciprocating mass at high frequencies, which are up to 4600 Hz (80w) in this research; (2) to determine the dominant force for compressor vibration among the three possible sources of shaking force due to reciprocating mass, impact forces due to clearance at the connecting rod - piston joint, and the z-axis force from the motor torque due to the rotor's conductor rods being skewed at an angle; (3) to minimize the difference in change of kinetic energies when switching between the one- and two-cylinder operating modes of the compressor. The properties of the vibration in one- and two-cylinder operation have been studied and results have been analyzed in terms of kinetic energies generated in different setting of operation of the compressor. Dynamic simulation for the impact force is computed using SIMULINK. The Z-axis force due to the motor is computed. Results indicated that shaking force due to the reciprocating mass is the dominant force for only the first two harmonics (w, 2w). An optimization routine based on Hooke and Jeeves pattern search method is developed and an optimized setting of angle, force, and torque for balancing of the crankshaft to achieve objective (3) is determined.
Master of Science

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10

Čep, David. "Klikový mechanismus plynového vidlicového šestnáctiválce." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229090.

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Diploma thesis is trying to analyze crank mechanism of a gas V-sixteen engine. Kinematics and balance crank mechanism are analyzed, dynamic model parameters are dermined, natural frequency of the torsional system are calculated, coupling parameters are designed and torsional problem with attached electric generator is analyzed.

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11

Guo, Shixian. "Kinematic Simulation and Structure Analysis of a Morphing Flap." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8437.

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This thesis presents a study on the design and analysis of a morphing flap structure integrated with actuation mechanism for potential application to large aircraft. Unlike the conventional rigid flap mounted on the wing trailing edge, the morphing flap is designed as a unitized structural system integrated with three primary components: the upper and lower ﬂexible skins reinforced by stringers, an eccentric beam actuation mechanism (EBAM) with discs fixed on it, and the connection of the discs with the stringers. Based on the EBAM concept proposed by Dr Guo in previous research [1], the current study has been focused on the EBAM design and optimization, kinematic simulation and structural modelling of the morphing flap. Although a lot of efforts have been made to develop the morphing flap in previous research, it is lack of detailed design of the disc-skin linkage and clear view on the mechanism optimization in relation to the shape requirement. The main objective of this research is to meet the morphing shape requirements and calculate the actuation torque for a specified morphing flap. Firstly effort was made to design and optimize the disc shape and locations in the EBAM for the best matching of the specified morphing shape with minimum actuation torque demand. It is found that minimum three discs are required and their locations have little effect on the actuation torque. Secondly attention was focused on designs of the disc and a C-linkage with the stringers. To ensure that the C- linkage works in practice, a twisted stringer flange design was proposed. Thirdly the actuation mechanism was integrated with the stiffened skin to play the role of an active rib in the flap structure. Based on the design, FE modelling and analysis of the morphing flap structure was carried out. The behaviour of the morphing flap under the internal actuation and external aerodynamic load was applied for stress analysis and detailed design of the structures. Finally the kinematics of the integrated morphing flap was simulated by using CATIA to demonstrate the feasibility and the effectiveness of the improved design.

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12

Stodolák, Martin. "Teoretické řešení pneumobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229939.

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This thesis covers the theoretical solution of the compressed air powered vehicle. The first section describes the competition of the compressed air powered vehicles, that is annually held in Hungary, where the idea for such a car design was created. There are also additional descriptions of the construction of the machines from the hungarian competition. In the second section there is a calculation of the chosen vehicle construction, where the main emphases is based on the calculation of the drive of the vehicle. The description of the manufacturing, tests and vehicle presentation follows.

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13

Šafařík, Petr. "Dvoudobý motor pro paragliding." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377466.

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This diploma thesis deals with the design of a two-stroke engine for paragliding. First of all, the different types and designs of two-stroke engines are discussed. After the design of the crank mechanism, the forces in the engine are tested, followed by the strength control of selected components. In addition, the work includes design of individual engine components, propeller reducer and 3D models of components and motor unit.

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14

Hlaváč, Štěpán. "Dvoudobý motor pro malý motocykl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227891.

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This diploma thesis contains an engineering design of a two-stroke engine for small motorcycle. In the first part, the background research of these motors was made. Main dimensions of the engine and a calculation of the forces acting in crank mechanism were determined. Further check stress analysis of connection rod and calculation using a finite element method were performed. This diploma thesis also includes virtual 3D models of all designed parts and a drawing of cross section of the motor.

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15

Avanço, Rafael Henrique. "Análise da dinâmica não-linear de pêndulos com excitação paramétrica por um mecanismo biela-manivela." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-27052015-113137/.

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O presente trabalho trata da análise da dinâmica de um pêndulo simples excitado em seu suporte por um mecanismo biela-manivela de forma ideal e não-ideal. No caso ideal, verifica-se que o resultado da excitação por este tipo de mecanismo se aproxima do resultado da excitação harmônica de suporte do pêndulo quando o raio da manivela é suficientemente pequeno em comparação com o comprimento da biela. A equação diferencial do sistema é resolvida numericamente e resultados do comportamento pendular são obtidos através de mapas de fase, histórico no tempo e seções de Poincaré. Expoentes de Lyapunov são, também, obtidos para a análise de casos caóticos posteriormente comparados com diagramas de bifurcação. Bacias de atração são desenhadas para os resultados estáveis do pêndulo: oscilatórios ou rotativos. Os resultados obtidos para a excitação por biela-manivela são dos mesmos tipos de movimento observados no caso do pêndulo excitado harmonicamente no suporte, entre eles: ponto fixo, oscilação, rotação pura, oscilação-rotação e o caos. Para a frequência de ressonância principal observam-se resultados caóticos em faixas mais largas de amplitude quando o raio de manivela se aproxima do comprimento da biela. Em frequências ressonantes menores nenhuma relação desse tipo pôde ser estabelecida. Uma análise utilizando o mesmo mecanismo é também feita com excitação por potência limitada de um motor elétrico linear de corrente contínua onde se investigou o efeito de feedback dado pelo pêndulo sobre o motor. Esses resultados são comparados com o caso ideal com a manivela acionada com rotação constante. Observa-se uma supressão do caos no caso não-ideal em casos de menor potência no motor. Entretanto, quando a potência de motor é maior, o modelo ideal coincide com o não-ideal.
In this analysis it was studied the dynamics of a simple pendulum excited by a crank-shaft-slider mechanism in the support ideally and non-ideally. In the ideal case, it was verified the result for an excitation by a crank-shaft-slider approaches to the result of the harmonically excited pendulum when the radius of the crank is sufficiently small in comparison with the length of the shaft. The resultant differential equation is solved numerically and the results of pendulum behavior are obtained by phase portraits, time histories and Poincaré sections. It is also calculated the Lyapunov exponents for the chaotic cases in analysis and a comparison is performed with bifurcation diagrams in the same regions. Basins of attractions are plotted for stable results like oscillatory and rotational solutions. In the results observed for the crank-shaft-slider excitation there are kinds of motion similar to those observed in the harmonic excitation: fixed points, oscillation, pure rotations, oscillation-rotations and chaos. However, in the principal resonance zone, chaotic results were more frequent when the radius of crank approaches the shaft length. A brief analysis is done concerning the same mechanism, but considering the excitation by limited power supply of a linear DC motor. In the sequence it is checked the feedback effect from the pendulum over the motor and comparison with the respective ideal excitation is accomplished where differences are commonly observed. With greater power the ideal model coincides with the nonideal model. In cases of lower power, the two models diverge in the results.

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16

Rexová, Natálie. "Inovativní nástroj pro odstranění špatné výslovnosti hlásky „R“." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316812.

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The purpose of this final thesis is to find out about Speech Therapy and to design a device which would help with oscillation of human tongue when the sound r is pronounced. To better understand this subject first part of this thesis takes interest in evolution and physiology of human speech. Next the most common articulation disorder Dyslalia is named and methods for treating Dyslalia are described. In practical part the device for Speech Therapy is designed and created. It is based on frequency of human tongue oscillations and it helps to correct difficulties with sound r articulation. This prototype uses electric motor which is controlled by Arduino platform. Its rotational motion is converted to linear through mechanical construction simulating crank mechanism.

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17

Böhm, Milan. "Dvoudobý motor pro malou mechanizaci." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-227890.

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This diploma thesis includes progress constructional design of 2 - stroke engine for small mechanization, using modern tools of computer aided design. In the first part is mentioned short summary contemporary types small mechanization with 2 - stroke engines. Follows part devoted conceptual design with calculation of the main dimensions of engine cylinder. After assesment strength load of cranked mechanism, is effected stress analysis of connection rod, whose design and modeling is part of work, how by the help of analytical figures from appropriate literature so by final element method. Last part of those work is estimation results with presentation parameters, which affect power of 2 - stroke engines for small mechanization.

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18

Černohous, Tomáš. "Dvouválcový řadový vznětový motor s excentrickým klikovým mechanismem pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232050.

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The goal of this master’s thesis is to examine the influence of eccentricity on the behaviour of forces between the piston and cylinder liner and on balancing of the crank mechanism for given parameters of the diesel engine. Another aim of this paper is to propose an appropriate balancing of the crank mechanism followed by stress analysis considering torsional vibration for a chosen value of eccentricity.

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19

Vetešník, Pavel. "Výpočtové porovnání ojnic zážehových motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-377364.

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Diploma work is focused on computational comparison of con-rod of spark ignition four-cylinder engine with volume 1289 cubic centimeters and con-rod of spark ignition three-cylinder engine with volume 1198 cubic centimeters. 3-D models of inspected con-rods were based on real shape. Force loads effects were established after kinematic and dynamic analysis. Stress analysis was made for these force loads effects in selected cases with help of Finite element method. Two con-rods were compared by using of these results.

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20

Horváth, Tomáš. "Zážehový sedmiválcový hvězdicový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399358.

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The aim of this diploma thesis is to propose a drive train of a seven-cylinder radial engine, including strength analysis of selected components. The basic parameters of the engine cylinder are based on the Škoda 1.2 HTP 12V 47kW AZQ engine.

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21

Ducheček, Martin. "Čtyřválcový řadový vznětový motor s excentrickým klikovým mechanismem pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232116.

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The purpose of this thesis is to evaluate the influence of eccentricity of crank mechanism to the force between the piston and the cylinder liner for appointed crank mechanism. Furthermore the influence of eccentricity to balancing crankshaft is verified and for selected value of eccentricity is realized balance. For the construction check was realized stress analysis of crank mechanism included torsion vibration.

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22

Petr, David. "Hydrodynamická ložiska vznětového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228924.

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This thesis deals with the hydrodynamic plain bearings tractor diesel engine. The first part is closer acquainted with the hydrodynamic bearing, its principles and materials used. The next part work deals with the multibody system adams-engine. The main part of this work is to model the crank mechanism and its storage in hydrodynamic bearings in the MBS program and the subsequent simulation under different operating conditions.

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23

Donutil, Jan. "Zážehový pětiválcový hvězdicový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399287.

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This thesis deals with configuration of radial five-cylinder engine with attention to crank mechanism. Covered topics are motion of crank mechanism with articulated connecting rod, force analysis and balancing of inertial forces. The second part discusses FEM analysis and calculation of safety factor of selected component.

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24

Steigl, Vladimír. "Čtyřválcový zážehový motor s vypínáním válců." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318839.

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The aim of this diploma thesis is design of configuration and balancing of crankshaft which is determined for four-cylinder gasoline engine. The thesis investigates kinematics, dynamics and possible ways of balancing the inertial forces and moments of the rotating and sliding parts of the central crank mechanism. Subsequently, the 3D CAD model is designed according to the presented drawing. It is transformed into a spare torsion system, from which the calculations of its own and forced torsional vibrations are based. The proposed 3D CAD model is then spatially transmitted in the FEA software Ansys Workbench and modified (boundary conditions, etc.) in the FEA software Ansys Mechanical APDL so that it can be calculated according to the selected LSA method. From the selected results of the LSA method, the crankshaft safety factor against fatigue damage is calculated.

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25

Gerardin, Rodrigo Ceccatto. "Modelo dinamico do sistema pistão-biela-manivela com mancais hidrodinamicos." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263457.

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Orientador: Marco Lucio Bittencourt
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-05T06:50:24Z (GMT). No. of bitstreams: 1 Gerardin_RodrigoCeccatto_M.pdf: 1433853 bytes, checksum: d1832bbbe32aa8b2f8edb3756793f3f5 (MD5) Previous issue date: 2005
Resumo: Atualmente, devido as exigências comerciais e técnicas, os motores de combustão interna operam com pressões de combustão cada vez mais altas. Ao mesmo tempo, deve-se otimizar a operação de todo sistema e a forma dos componentes levando-se em conta a melhor performance e redução de peso. Para um melhor entendimento do comportamento dinâmico de um motor de multi cilindros, é necessário verificar a cinemática e a dinâmica para apenas um cilindro como feito neste trabalho. O foco principal deste trabalho é desenvolver um modelo matemático para determinar as distribuições de pressão e as forças atuantes nos mancais hidrodinâmicos para um cilindro de um motor de combustão interna. Um modelo dinâmico do sistema de pistão-biela-manivela é apresentado e permite calcular as forças dinâmicas e folgas no mancal principal, olhais maior e menor da biela derivados da pressão de combustão. O modelo matemático do mancal hidrodinâmico radial é oriundo da equação de Reynolds e resolvido utilizando o Método de Elementos Finitos. O sistema dinâmico não-linear é resolvido utilizando o método iterativo de Newton-Raphson para cada passo de integração no tempo
Abstract: Due to the current commercial and technical requirements, the internal combustion engines must operate under higher pressures. It is also necessary to optimize the system operation and the shape of the components aiming at increasing the performance and weight reducing. For a better understanding of the dynamical behavior of a multi-cylinder engine, it is necessary to verify the kinematics and dynamics for just one cylinder, as considered in this work. The main focus of this work is the development of a mathematical model to determine the pressure distributions and the hydrodynamic bearing forces for one cylinder internal combustion engine. The dynamical model of the piston-conrod-crank system is presented and allows the calculation of the dynamic forces and clearances obtained from the combustion pressure for the main, big-end and small-end bearings. The mathematical model of the hydrodynamic bearing comes from the Reynolds equation and is solved by the Finite Element Method. The non-linear dynamic system is solved by the iterative Newton-Rhapson method for each time integration step
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica

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26

Biječek, Tomáš. "Deformačně-napjatostní analýza ojnice spalovacího motoru pomocí MKP." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228164.

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In this diploma thesis is completed the FEM analysis of connecting rod in combustion engine Briggs & Stratton of the garden lawnmower. Within the frame of computing in the FEM system ANSYS Workbench is solved static structural strein and stress analysis, buckling analysis a fatigue also. The boundary conditions for FEM computing come out from the kinematic and dynamic analysis of the crank-slider mechanism in combustion engine. The 3-D models of the crank-slider mechanism are created in parametric SolidWorks modeller. Own construction variants of the connecting rod based on results of FEM analysis are also designed.

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27

Špaček, František. "Výpočtová analýza pístu řadového tříválcového zážehového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-377361.

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The diploma thesis deals with a mechanical and thermal analysis of 3-cylinder petrol engine piston with capacity of 1,2 l and maximal output 47 kW. The computation analysis was created with the use of finite element method in the Ansys application. The strain solution was created using several techniques. The 3D model was made according to a real piston in the Pro/Engineer and was partly simplified for computation. Crank mechanism forces and the load stresses were solved using Mathcad. Calculations are done for three positions of power cycle engine, where the maximal loads of the piston are expected. Last part of the thesis is calculation of safety factor highcyclical fatigue made using Femfat application.

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28

Kučera, Ondřej. "Čtyřválcový řadový zážehový letecký motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444959.

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The thesis deals with the structural design of a steel connecting rod for the aircraft engine Walter Mikron III, which is currently still manufactured and developed by company PARMA-TECHNIK, s.r.o. The proposed connecting rod would replace the current duralumin connecting rod. The work also contains a strength analysis of the designed component, in which it was aimed to verify the stress on the connecting rod, based on which the fatigue safety factor was performed. This is crucial for dynamically stressed parts of internal combustion engines. Furthermore, was investigated the effect of the change of the connecting rod on the torsional vibration of the crank mechanism. For this purpose, was built a discrete torsion model. The output of the whole work is the drawing documentation of the new connecting rod, meeting the requirements for application in an aircraft engine.

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29

Ehrenberger, Pavel. "Modální vlastnosti klikového ústrojí čtyřválcového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228988.

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This diploma thesis contains a summary of the general information about the torsion vibration of the crankshaft. The main task is to prepare a flexible model of the crankshaft in the FEM program ANSYS and the subsequent export into the MBS ADAMS / Engine. According to parameters the model of four-cylinder line tractor engine with flexible crankshaft is built. Crank mechanism is analyzed to determine the natural frequencies and natural modes. Finally the results are evaluated and compared with analytical calculations.

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Nikolaychuk, Yaroslav. "Čtyřválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377457.

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The diploma thesis focuses on the design of the crankshaft for a four-cylinder diesel engine for commercial vehicles, the main task of this work are the design configuration of the crankshaft balance inertia forces and torques at the crank mechanism, drawing documentation crankshaft design strength check considering torsional vibration.

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31

Švarc, Marek. "Pětiválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318711.

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The aim of this diploma thesis is the design of the configuration and the method of balancing the crank mechanism with the specified parameters. For a particular configuration, a crankshaft drawing is processed and a strength analysis, considering the crankshaft torsional vibrations is performed in Ansys FEM software. At the end of the thesis, an ideological design of the torsional vibration damper and its effect on the crankshaft stress in the Ansys FEM software is performed.

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32

Doležal, Lukáš. "Inovace skládané klikové hřídele pro minibikové motory." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229398.

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The present diploma thesis deals with innovation of built-up crankshaft of Blata minibikes. Minibike is the type of a small two-stroke motorcycle equipped with an internal combustion engine of the volume 40 or 50 cm3. The machine is designed for racing circuits; not only for young riders but also for seniors. The innovation is in the design and verification of pressed connections in the imposition of major pins in the arms of the crankshaft. Pressed connections are designed on the basis of the analysis of force interaction on the crankshaft at maximum revolutions. The proposed solutions are verified by FEM calculations. Based on the results, the best option is selected. For the selected option, the impact of force interaction at maximum machine performance is studied. Finally, on the basis of these facts, designing, technological and economic analysis of feasibility of new production technology is carried out.

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33

Novák, Vít. "Pohonné ústrojí čtyřválcového řadového zážehového leteckého motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417579.

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The focus of this work is to determine the stress of the crank mechanism of the inverted piston aircraft engine Walter Mikron III C UL from the manufacturer PARMA - TECHNIK, s.r.o. The main method of calculation is the numerical finite elements method using the program ANSYS Workbench, the module Static structural and Transient structural. The approximate indicated cylinder pressure during the duty cycle was determined in the GT-SUITE software. The partial goals are to propose possible modifications in the construction of the crank mechanism and to state the possible power reserves of the engine. The diploma thesis also briefly summarizes the history and development of aircraft piston engines from the company Walter, which developed the engine, and the line of Walter Mikron engines.

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34

Hruška, Miroslav. "Hydrodynamická ložiska šestiválcového vznětového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229930.

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This master’s thesis focuses on hydrodynamic plain bearing drivetrain in-line sixcylinder diesel tractor engine. In the first part is used as reported in contemporary bearing materials and design solutions bearing basins. Furthermore, given the general Reynolds equation of hydrodynamic lubrication. The main part of the thesis is devoted to creating a virtual model of the crank mechanism in MBS system ADAMS/Engine. Rigid crankshaft in this model is replaced by the flexible crankshaft, which is prepared in the FEM software ANSYS and then exported. The final section presents the results of simulations and their evaluation.

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35

Pulava, Oleksandr. "Šestiválcový vznětový motor pro užitková vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378397.

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The aim of this diploma is to design a crankshaft for a six-cylinder commercial vehicle, which is one of the unified motors. The main parts are the design of the crankshaft configuration, the crankshaft balancing method for forces and moments, the crankshaft design documentation, and the crankshaft strength verification. The design of torsional vibration damping characteristics is also made and its effect on torsional vibration and crankshaft strength is determined.

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36

吳祀嬴. "Fact Sheet for Mechanical Design of Double-Crank Mechanism and Crank-Rocker Mechanism." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/51480309840412411630.

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碩士
建國科技大學
機械工程系暨製造科技研究所
99
Mechanical designers often encounter situations which require a solution to the design of double-crank mechanism and crank-rocker mechanism. In accordance with principles of the mechanisms, the study employs Computer Aided Geometric Design(CAGD) to create geometric patterns and set up a motion analysis. Based on the findings, the study makes an at-a-glance tool(fact sheet) to help mechanical designers to get desired answers quickly during the design process for a high speed, efficient, flexible, energy saving and reasonable double-crank mechanism and crank-rocker mechanism.

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37

Hsu, Tzu-Hao, and 徐梓皓. "Design of a Retractable Crank Mechanism for Bike." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/d4advf.

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碩士
國立臺北科技大學
機電整合研究所
98
This dissertation presents a retractable mechanism design of pedal crank for bicycle. It allows the length of the crank to be variable according the crank angular position in order to achieve efficient transmission. We model the bicycle and the rider’s leg as a five-bar linkage with revolute joints only, and derive the related equations for kinematic and force analysis. By taking into account the location of the human lower limb geometry and the ability of applying force of thigh, the optimum crank length for each crank position is obtained. Then, the required cam mechanism is designed according the obtained variable crank lengths. . The 3D model of this design has been constructed via Pro / Engineer Wildfire 3.0 software. The simulation has also been performed to check for interference. Then, the strength analysis is done by using ANSYS Workbench 11.0 software to verify the strength of this design. Finally, a prototype of this design has been fabricated and installed in a bicycle to confirm its feasibility.

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CHEN, YIN-QUAN, and 陳盈全. "Shaking force balancing design of slider-crank mechanism." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/36275757208701209620.

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LEE, HSIN HU, and 李新護. "Application of Slider – Crank Mechanism in Lifting a Weight." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/40370419861161764109.

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碩士
國立雲林科技大學
機械工程系
104
Abstract In this study, the application of slider – crank mechanism in lifting a weight is discussed. During the mechanism design stage, the effects of significant factors on mechanical performance should be studied. By computer aided software and mechanism theory, the mechanical behaviors can be predicted in advance to improve the design accuracy. The position, velocity, and acceleration analysis of each link are performed to predict the mechanism behavior of the slider-crank system. Then the dynamical analysis is carried out to solve the reaction force and torque on each link. The required horse power of motor can be estimated by the driving force. The feasible procedures to design a mechanism system is proposed to solve several practical problems.

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邱勝琳. "Design of Nonlinear Controllers for A Montor-Slider-Crank Mechanism." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/01692059537589140202.

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碩士
中原大學
電機工程學系
85
The object of this thesis is to design nonlinear controllers for the slider-crank mechanism, which is driven by a permanent magnet (PM) synchronous servo motor. First, the dynamic equation of motion of the motor-slider-crank coupled system is derived by Hamilton's principle and Lagrange multiplier method. Then, an adaptive controller and a sliding mode controller are designed to enhance the robustness of the coupled system with regard to external load disturbance and plant parameter variations. Finally, numerical simulation and experimental results are presented to show that the proposed nonlinear controllers are suitable to apply in the motor-slider-crarik coupled system with good tracking performance.

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Pham, Thanh-Thuan, and 范成順. "Optimal Design and Manufacture of a Compliant Crank-Slider Mechanism." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/k62e75.

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碩士
國立高雄應用科技大學
機械與精密工程研究所
102
A compliant mechanism achieves its movement via the expansion of flexible segments or the distortion of one portion of the materials employed. However, repeating the deformation of materials in compliant mechanisms causes a serious problem that has not been considered in previous work. A number of viable configurations were investigated herein, based on the Finite Element Method to carry out the comparison of convergence stress on each model, in order to select one configuration. The comparison technique is then combined with optimization to obtain the configuration with improved performance. From this configuration, a prototype was generated and tested. The testing result showed that the compliant crank-slider mechanism indicated displacement, as well as characteristics similar to the model prediction. This thesis offers directions for further work by incorporating a compliant crank-slider mechanism into electrical contacts called constant-force electrical contacts.

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42

Chu, Wei-Cheng, and 朱偉誠. "A Novel Mechanism Design of Variable-Length Crank for Bicycle." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6y9dsv.

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碩士
國立臺北科技大學
機電整合研究所
102
This thesis presents a novel variable-length crank mechanism design intended for application on a bicycle. Based on an effective and laborsaving foot-peddling path, the intuitively simple design allows for simple installation and energy conservation. The variable lengths of the pedal crank are obtained by considering the pedal force from the human foot at different configurations during peddling. The resulting lengths corresponding to the angular position of each crank are too complicated to design a simple mechanism. Therefore, an approximated elliptical curve is adopted for the design. An elliptic trammel mechanism is then applied to this desired device for efficient pedaling. Solidworks software was used to model and create the dynamic stimulation of this novel design. The preliminary result has confirmed its feasibility.

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WEN, SZU-HAO, and 溫斯皓. "Heat Transfer with Oscillating Foil Actuated with Crank-Rocker Mechanism." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/07582564925059478937.

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碩士
臺北城市科技大學
機電整合研究所
103
This research experimentally studies the heat transfer of heat sink with oscillating foil actuated with linkage. The experiments were conducted in a rectangular duct. The linkage which is driven by motor results in oscillation of foil in the duct. The induced air flow in the duct causes forced convective heat transfer on heat sink. Five angular amplitudes, four oscillating frequencies, and three foil lengths are employed to measure the averaged velocity at the inlet and the junction temperature of the heating surface. The air flow and heat transfer performance are analyzed with the measured data. In addition, the flow structures were recorded and observed with high speed digital camera and smoke.

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44

Feng, Chien-Sen, and 馮建森. "Dynamic Analysis and Control of a Spatial Slider-Crank Mechanism." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/52066847461711889313.

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碩士
國立高雄第一科技大學
機械與自動化工程所
91
The kinematic and dynamic formulations of a spatial slider-crank mechanism shall be redefined by simply geometric constraints in this study. The governing equations, formulated by the Hamilton principle and partitioning method, include effects of mass, external force, reducing gear box and motor electric input. In order to verify the perfection of geometric modeling, the simulated software-MSC. VisualNastran 4D is adopted in contrast with the numerical analysis of kinematics. Furthermore, the integral variable structure control (IVSC) is employed to execute the velocity and position controls. Numerical results show that the accuracy of kinematic analysis, and the good performance of IVSC robust against to the parameter variation and external disturbance.

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45

Chen, Shin-Jen, and 陳信任. "Kinematic and Dynamic Analysis of an Intermittent Slider-Crank Mechanism." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/13513295629946190393.

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碩士
中原大學
機械工程研究所
89
This paper investigates kinematic and dynamic analyses of an intermittent slider-crank mechanism which consists of four parts: crank, pneumatic cylinder, slider and two stops at both ends of the stroke. When the crank rotates continuously, the slider contacts with the stops and the pneumatic cylinder is compressed or extended. Meanwhile, a manipulator attached at the slider can operate upward or downward. The motions of the intermittent slider-crank mechanism could be divided into three stages, and be formulated by Hamilton’s principle. In order to compare the operating performance of the motor-mechanism coupled system, the PM synchronous servomotor with the integral variable structure control (IVSC) and separately excited DC motor taken as actuators are investigated. Finally, by using Runge-Kutta method, the transient amplitudes are obtained and compared with the traditional slider-crank mechanism.

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46

TAN, CHUAN-MING, and 譚傳明. "Muscle mechanism analysis in concentric and eccentric contractions." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/67672748990661547136.

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黃英德. "Force and Vibration Analysis of Crank-Rocker Pick and Place Mechanism." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/96832190528433405904.

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碩士
明新科技大學
精密機電工程研究所
99
High speed is an important issue in the semiconductor processing equipment. As usual, the chip needed to be transferred frequently in the semiconductor back-end processing. In recent years, the Pick & Place Machine (PPM) has been widely applied to automation equipments and press fabrication industries, especially in semiconductor IC packaging process because it could satisfy the requirements. Die bonding is a very important process of IC packaging. The quality of IC packaging depends on the speed, accuracy, and precision of the pick and place process. Therefore, a pick and place device is always necessary to hit the target of accurate transmission at the shortest time. One of the most important and common mechanisms is the crank-rocker. It is found in pumps, compressors, steam engines, feeders, crushers, etc. Specially, It is very useful to perform the function of pick and place used in die-bonding system in semiconductor fabrication. In this research, the author has cooperated with the professional IC package equipment manufacturer, 3S Silicon Tech., Inc. The purpose of this research is to propose a mechanical design, kinematic, dynamic analysis and measure the vibration for a crank-rocker pick and place mechanism (PPM), which is applied to a die-bonding system.

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48

CHEN, GUAN-ZHOU, and 陳冠州. "The dynamic analysis of a slider-crank mechanism with bearing clearance." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/35622564981690539655.

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49

Chen, Hsin-Hung, and 陳信宏. "Vibration Analysis of a Slider-Crank Mechanism by Finite Element Method." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/75291383041246885369.

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碩士
中原大學
機械工程研究所
82
In this thesis, the vibration analysis of slider-crank mecha- nism with a flexible connecting rod is studied. The equations of motion of Timoshenko beam and its corresponding boundary conditi- ons are developed by Hamilton's principle, which are transformed into a set of ordinary differential equations by using of finite element method. The realistic operation condition is that the cr- ank rotates, and the end of connecting rod moves reciprocally wi- th slider along the horizontal guide.The geometric constraint of the end of connecting rod is derived and introduced into the equ- ations of motion and boundary conditons. It is found that the bo- undary condition of the connecting rod moving with slider is the moving boundary supports, but not the simply supported ones assu- med in all references. Finally, the Runge-Kutta numerical method is applied to obtain the transient amplitudes which are compared with those of considering the flexible rod to be Euler beam or assuming the ends of connecting rod to be simply supported. Fur- thermore, the harmonic balance method is used to obtain the steaty-state solutions of the system.

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50

Tsai, Sheng-Hsun, and 蔡昇勳. "Dynamic Analysis and Balancing of Planar Slider-Crank Mechanism with Clearances." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/17905216864631009359.

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