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Relevant bibliographies by topics / Planetary gear

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Academic literature on the topic 'Planetary gear'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

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Journal articles on the topic "Planetary gear"

1

YANASE, Yoshikoto, Yuji ASHIZAWA, Masashi OCHI, and Hiroshi GUMBARA. "GM-12 GEAR GRINDING MACHINE FOR INTERNAL GEARS OF PLANETARY GEAR SYSTEM(MANUFACTURING OF GEARS)." Proceedings of the JSME international conference on motion and power transmissions 2009 (2009): 159–62. http://dx.doi.org/10.1299/jsmeimpt.2009.159.

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Xu, L., and X. Zhu. "Magnetic planetary gear drive." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 9 (June 2, 2009): 2167–81. http://dx.doi.org/10.1243/09544062jmes1441.

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In this study, a magnetic planetary gear drive is proposed and its operating principle is introduced. The equations of the geometrics and kinematics for the drive are given. The equations of the magnetic induction intensity for the magnetic gear teeth are deduced. The equations of the torques between the planetary gears and sun gear or crown gear are developed. The available parameters of the magnetic planetary drive are presented and the magnetic flux density distributions of the magnetic gear teeth are investigated. The torques between the planetary gears and sun gear or crown gear are analysed. When the relative rotating angle between the gears is increased, the magnetic torque grows, gets to a maximum value, and then drops. The maximum torque represents extreme load-carrying ability of the drive system. The pole pair number, the tooth thickness and the tooth width of the magnetic gears, and the speed ratio of the drive have obvious influence on the output torques. To obtain a large magnetic torque, a large tooth width of the gear, a proper pole pair number, a proper radial thickness of the tooth, a large planetary gear number, and a large speed ratio should be chosen.

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Hsieh, Long Chang, Teu Hsia Chen, and Hsiu Chen Tang. "On the Kinematic and Meshing Efficiency Analysis of Planetary Gear Reducer with Two Ring Gears." Applied Mechanics and Materials 575 (June 2014): 395–99. http://dx.doi.org/10.4028/www.scientific.net/amm.575.395.

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Planetary gear trains can be used as the gear reducers with high reduction ratio. This paper focused on the kinematic and meshing efficiency analysis of planetary simple gear reducer with two ring gears. First, the planetary simple gear train with two ring gears is proposed by using different shift coefficients. Then, by referring to the train value equation, the reduction-ratio equation is derived for the design the planetary gear reducer with two ring gears. According to reduction-ratio equation, the planetary gear reducers with two ring gears and having reduction ratios (20, 50, and 100) are synthesized. Then, based on the latent power theorem, the meshing efficiency equation of planetary gear train with two ring gears is derived. According to the meshing efficiency equation, the meshing efficiencies of planetary gear trains with two ring gears are analyzed. In this paper, we conclude: (1) Larger reduction ratio makes less meshing efficiency, and (2) The meshing efficiency of planetary gear reducer with two ring gears is not good.

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Chen, Yuxiang, Mutellip Ahmat, and Zhong-tang Huo. "Dynamic meshing incentive analysis for wind turbine planetary gear system." Industrial Lubrication and Tribology 69, no. 2 (March 13, 2017): 306–11. http://dx.doi.org/10.1108/ilt-12-2015-0203.

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Purpose Irregular windy loads are loaded for a wind turbine. This paper aims to determine the form of gear failure and the working life of the gear system by assessing the dynamic strength of gears and dynamic stress distribution. Design/methodology/approach The helical planetary gear system of the wind turbine growth rate gearbox was investigated, and while a variety of clearance and friction gear meshing processes were considered in the planetary gear system, a finite element model was built based on the contact–impact dynamics theory, solved using the explicit algorithm. The impact stress of the sun gear of the planetary gear system was calculated under different loads. An integrated planetary gear meshing stiffness, and the error of system dynamic transmission error were investigated when the planetary gear meshes with the sun or ring gears. Findings The load has little effect on the sun gear of the impact stress which was known. The varying stiffness is different while the planetary gear meshes with the sun and ring gears. There were differences between the planetary gear system and the planetary gear, and with load, the planetary gear transmission error decreases. Originality/value This study will provide basis knowledge for the planetary gear system.

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Hsieh, Long Chang, Hsiu Chen Tang, Tzu Hsia Chen, and Jhen Hao Gao. "The Kinematic Design of 2K Type Planetary Gear Reducers with High Reduction Ratio." Applied Mechanics and Materials 421 (September 2013): 40–45. http://dx.doi.org/10.4028/www.scientific.net/amm.421.40.

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3K type and 2K-2H type planetary gear trains can be designed to have high reduction ratios. Due to the reason of power circulation, these two kinds of planetary gear trains with high reduction ratios have low meshing efficiencies. The 2K type planetary gear reducer only contain two ring gears and one carrier, hence it will not have the problem of power circulation and will have better meshing efficiency than 3K type and 2K-2H type planetary gear reducers. Also, in general, the gear reducers with high reduction ratio are compound gear system. The purpose of this paper is to propose 2K type planetary simple gear reducers with high reduction ratios. Based on the concept of train value equation, the kinematic design of 2K type planetary gear trains with high reduction ratio are synthesized. Six 2K type planetary gear reducers are designed to illustrate the kinematic design process. Three of the examples are 2K type planetary gear reducers with simple planet gears. For the 2K type planetary simple gear reducer, there is a problem that is the simple planet gear engages to two ring gears with different tooth number. One example is used to illustrate how to design the two ring gears with different shift coefficient to engage the same planet gear. Based on the proposed process, all 2K type planetary simple gear reducers with high reduction ratios can be synthesized.

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Hsieh, Long Chang, and Tzu Hsia Chen. "On the Design of Planetary Gear Reducer with Simple Planet Gears." Applied Mechanics and Materials 284-287 (January 2013): 867–71. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.867.

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Planetary gear trains are commonly used in various transmissions due to the following reasons: compact size, light weight, and multi-degrees of freedom. For example, planetary gear trains can be designed for following functions: gear reducers for power machinery, internal gear hubs for bicycle, gear increasers for wind generator, gear reducers for robot. In general, the reduction of non-coupled planetary gear train is less than 10. The purpose of this paper is to introduce the planetary gear train with high reduction ratio. Coupled planetary gear train can be designed to has high reduction ratio. Hence, this paper focuses on innovative, kinematic, and engineering design of coupled planetary gear train with high reduction ratio. The coupled planetary gear train synthesized in this paper is a planetary gear train with simple planet gears. It can be used as the gear reducer for a robot. Refer to the train value equation, the reduction-ratio equation of coupled planetary gear train is derived for the design purpose. Then, the coupled planetary coupled gear train with simple planet gears is synthesized based on the above reduction-ratio equation. Finally, the corresponding engineering design drawing is accomplished.

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Park, Sung Hoon, Hyun Dai Yang, Jee Ho Kim, and Joong Ho Shin. "Design and Application of a Planetary Gearbox for Small Wind Turbines." Applied Mechanics and Materials 271-272 (December 2012): 818–22. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.818.

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A planetary gear train consists of a sun gear, planet gears, and a ring gear and these gears are arranged as a concentric circle type. The gearbox proposed in this study arranges the planetary gear type as a double planetary gear train in which the output of the primary gear train is used as an input to the secondary planetary gear for accelerating its speed. In this design, a method that directly connects the input and output sections is introduced to obtain a high acceleration ratio and its applicability is verified for applying it to a small wind turbine through designing and fabricating the planetary gearbox.

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Yang, Shyue-Cheng, and Tsang-Lang Liang. "A PLANETARY GEAR TRAIN WITH RING-INVOLUTE TOOTH." Transactions of the Canadian Society for Mechanical Engineering 32, no. 2 (June 2008): 251–66. http://dx.doi.org/10.1139/tcsme-2008-0016.

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This paper proposes a planetary gear train with ring-involute tooth profile. Inherent in a planetary gear train is the conjugate problem among the sun, the planet gears and the ring gear. The sun gear and the planet gear can be obtained by applying the envelope method to a one-parameter family of a conical tooth surface. The conical tooth rack cutter was presented in a previous paper [5]. The obtained planet gear then becomes the generating surface. The double envelope method can be used to obtain the envelope to the family of generating surfaces. Subsequently the profile of a ring gear of the planetary gear trains can be easily obtained, and using the generated planet gear and applying the gear theory, the ring gear is generated. To illustrate, the planetary gear train with a gear ratio of 24:10:7 is presented. Using rapid prototyping and manufacturing technology, a sun gear, four planet gears, and a ring gear are designed. The RP primitives provide an actual full-size physical model that can be analyzed and used for further development. Results from these mathematical models are applicable to the design of a planetary gear train.

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Kahraman, A. "Planetary Gear Train Dynamics." Journal of Mechanical Design 116, no. 3 (September 1, 1994): 713–20. http://dx.doi.org/10.1115/1.2919441.

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A model to simulate the dynamic behavior of a single-stage planetary gear train with helical gears is developed. The three-dimensional dynamic model includes all six rigid body motions of the gears and the carrier. The generic nature of the formulation allows the analysis of a planetary gear set with any number of planets. Planets can be arbitrarily spaced (equally or unequally) around the sun gear. The model is also capable of handling different planet meshing conditions which are functions of number of gear teeth and planet positions. The linear time-invariant equations of motion are solved to obtain the natural modes and the forced vibration response due to static transmission errors. The proposed model is employed to describe the effects of the planet mesh phasing conditions on the dynamic behavior of a four-planet system.

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Xiao, Zhengming, Jinxin Cao, and Yinxin Yu. "Mathematical Modeling and Dynamic Analysis of Planetary Gears System with Time-Varying Parameters." Mathematical Problems in Engineering 2020 (March 16, 2020): 1–9. http://dx.doi.org/10.1155/2020/3185624.

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Planetary gears are widely used in automobiles, helicopters, heavy machinery, etc., due to the high speed reductions in compact spaces; however, the gear fault and early damage induced by the vibration of planetary gears remains a key concern. The time-varying parameters have a vital influence on dynamic performance and reliability of the gearbox. An analytical model is proposed to investigate the effect of gear tooth crack on the gear mesh stiffness, and then the dynamical model of the planetary gears with time-varying parameters is established. The natural characteristics of the transmission system are calculated, and the dynamic responses of transmission components, as well as dynamic meshing force of each pair of gear are investigated based on varying internal excitations induced by time-varying parameters and tooth root crack. The effects of gear tooth root crack size on the planetary gear dynamics are simulated, and the mapping rules between damage degree and gear dynamics are revealed. In order to verify the theoretical model and simulation results, the planetary gear test rig was built by assembling faulty and healthy gear separately. The failure mechanism and dynamic characteristics of the planetary gears with tooth root crack are clarified by comparing the analytical results and experimental data.

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Dissertations / Theses on the topic "Planetary gear"

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Wu, Xionghua. "Vibration of Planetary Gears Having an Elastic Continuum Ring Gear." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276524893.

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Ericson, Tristan Martin. "Experimental Study of Planetary Gear Dynamics." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354212365.

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Wang, Zhongwei. "Dynamic modelling of planetary gear systems for gear tooth fault." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/1284.

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Geared systems have been widely used in mechanical applications for more than a hundred years. A large range of literature has been published especially for spur/helical gear systems and the investigations into technical areas of spur/helical gears have been very well developed, including understanding of condition monitoring systems, diagnostic and prognostic methods. However, there is a lack of understanding on the general dynamic behavior of planetary gear systems with tooth faults. Planetary gears are normally used as effective power transmission elements with high power to weight/volume ratios, large speed reductions in compact volume, and high reliability. They tend to have high efficiency and are used in many applications, such as automotive, heavy truck/tractor, helicopter, wind turbines and bucket wheel reclaimer gearboxes.The purpose of this research is to develop a vibration analysis system that simulates dynamic behavior of large low speed, high torque planetary spur gear systems such as used in bucket wheel reclaimer and wind turbine gearboxes, with and without gear element faults. This thesis investigates lumped mass modelling methods for planetary gearbox dynamic behavior based on previous gearbox modelling research including the use of the coupled torsional-transverse behavior of the gear body. The dynamic model of the planetary spur gear system includes effects such as: variable tooth mesh stiffness, dynamic transmission error effects, and pitch and profile excitation for gear fault detection purposes. Different tooth faults are simulated using the concept of combined torsional mesh stiffness. The dynamics of spur planetary gear systems with and without tooth faults are compared and analyzed to improve the understanding of fault detection in the present gear systems.Dynamic modelling of gear systems, such as outlined in this thesis can assist in understanding the consequence of large transient events, including the fluctuations in tooth loads which can reduce gear fatigue life and lead to further tooth damage. Early detection of faults on gear teeth can be used to initiate maintenance actions in order to reduce repair work and avoid catastrophic breakdown.

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Lin, Jian. "Analytical investigation of planetary gear dynamics /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488203552779634.

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Ligata, Haris. "Impact of system-level factors on planetary gear set behavior." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1172599656.

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Hilty, Devin R. "An Experimental Investigation of Spin Power Losses of Planetary Gear Sets." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276270638.

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Guo, Yichao. "Analytical Study On Compound Planetary Gear Dynamics." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1312289370.

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Eritenel, Tugan. "Three-Dimensional Nonlinear Dynamics and Vibration Reduction of Gear Pairs and Planetary Gears." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298651902.

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Deake, Jeremy J. "Volume optimization of a simple planetary gear set." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1591595.

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This thesis describes a custom algorithm developed to optimize a simple planetary gear set. The optimization minimizes volume for one simple planetary gear set using American Gear Manufacturers Association stress equations, custom design constraints, and material constraints. Through predetermined reactions to adjustments, component features and planetary variables are modified systematically to obtain the target solution. This thesis demonstrates that the defined approach is an effective means of balancing all three components of a simple planetary gear set, thus resulting in a solution that has been optimized for volume.

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Jonsson, Martin. "Planetary Gear Analysis : deformation induced misalignment and optimization." Thesis, KTH, Maskinkonstruktion (Inst.), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276682.

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A handheld heavy-duty nut runner, commonly used to assemble windmills and oil pipe lines, and capable of producing 4100 Nm of torque, experiences low cycle fatigue and usually fails after 20 000 cycles at the specified torque. A full assembly Finite element model of the last stage of the four-stage planetary gearbox is constructed and simulated over one complete load cycle. The results from the simulation is compared with, and used to verify a KISSsoft simulation of the same model. Using the Finite Element model, a parametric optimization is performed using a full factorial design. The results show that misalignment issues are difficult to prevent due to the planetary gearbox design. Comparing the two models shows similar characteristics and stress levels but that local differences are common. A proposed design improvement results in better load distribution in the planet – ring interaction, which was previously impaired compared to the planet – sun interaction due to deformation induced misalignment. The result shows that by balancing the rotational stiffness of the side 1 and side 2 carrier pin mountings, it is possible to reduce the contact misalignment and improve the load distribution in the gearbox.
En handhållen mutterdragare vars användningsområde innefattar bland annat montering av vindkraftverk och oljeledningar, producerar ett vridmoment om 4100 Nm. På grund av det här havererar vanligtvis verktyget av utmattning vid ca 20 000 cykler, något som tros vara kopplat till vinkelfel som uppkommer vid deformation av verktygets växellåda. Vinkelfelen resulterar i att lastfördelningen mellan kugghjulen blir skev och spänningskoncentrationer uppstår. Finita elementmetoden används för att undersöka uppkomsten av vinkelfelen och en komplett modell av hela det sista steget i den fyrstegade planetväxellådan undersöks. Simuleringen jämförs med en liknande modell i KISSsoft, dels för att bekräfta resultatet från simuleringen, dels för att undersöka skillnader och svagheter i de båda modellerna. FE-modellen används även för att bygga upp en parametrisk optimering baserat på faktoriell design. Resultatet visar att vinkelfel är svårt att motverka på grund av växellådans design och konfiguration. Jämförelsen av de två simuleringsmodellerna uppvisar liknande karaktärsdrag och spänningsnivåer men att lokala skillnader finns mellan de båda modellerna. Optimeringen resulterar i en föreslagen designförändring som visar sig förbättra lastfördelningen i planet – ring – interaktionen utan att påverka lastfördelningen i planet – sol – interaktionen. Det här är att föredra eftersom lastfördelningen mellan planet och sol är bättre än lastfördelningen mellan planet och ring. Resultatet visar också att det är möjligt att minimera vinkelfelet mellan kontaktytorna, och förbättra lastfördelningen i växellådan genom att balansera rotationsstyvheten på var sida om planeten i planetbäraren.

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Books on the topic "Planetary gear"

1

Planetary gear. New York: Roof, 1991.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. Planetary Gear Trains. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521.

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Savage, M. Effects of planetary gear ratio on mean service life. [Washington, DC]: National Aeronautics and Space Administration, U.S. Army Research Laboratory, 1996.

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Savage, M. Effects of planetary gear ratio on mean service life. [Washington, DC]: National Aeronautics and Space Administration, U.S. Army Research Laboratory, 1996.

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Wei xing xing xing chi lun chuan dong she ji. Beijing Shi: Guo fang gong ye chu ban she, 2013.

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Parker, Robert G. Modeling, modal properties, and mesh stiffness variation instabilities of planetary gears. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2001.

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Roland, Herrmann. From planet gears to digital print: 1898-1998, 100 years KBA-Planeta AG. Edited by Kühnrich Peter, Bolza-Schünemann Albrecht, Dänhardt Martin, and Plage Dieter. Radebeul, Germany: KBA-Planeta AG, 1998.

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Folenta, Dezi. Design, manufacture, and spin test of high contact ratio helicopter transmission utilizing self-aligning bearingless planetary (SABP). [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Division, 1988.

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AG, KBA-Planeta. From planet gears to digital print: 1898-1998, 100 years KBA-Planeta AG. Radebeul: KBA Planeta, 1998.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. Planetary Gear Trains. Taylor & Francis Group, 2019.

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Book chapters on the topic "Planetary gear"

1

Vullo, Vincenzo. "Gear Trains and Planetary Gears." In Springer Series in Solid and Structural Mechanics, 695–772. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36502-8_13.

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Chen, Yong. "Planetary Gear Drive." In Springer Tracts in Mechanical Engineering, 437–83. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6703-2_11.

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Arnaudov, Kiril, and Dimitar P. Karaivanov. "Planetary Gear Trains." In Dudley's Handbook of Practical Gear Design and Manufacture, 1071–115. 4th ed. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003126881-22.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "AI-Planetary Gear Train." In Planetary Gear Trains, 207–13. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-22.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "Reduced Planetary Gear Trains." In Planetary Gear Trains, 291–305. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-34.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "Special Planetary Gear Trains." In Planetary Gear Trains, 337–38. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-38.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "I -Planetary Gear Train (K-H-V Gear Train)." In Planetary Gear Trains, 245–50. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-27.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "Introduction." In Planetary Gear Trains, 3–10. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-1.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "Types of Power in A I ¯ -Planetary Gear Train." In Planetary Gear Trains, 109–12. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-10.

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Arnaudov, Kiril, and Dimitar Petkov Karaivanov. "Types of Losses and Basic Efficiency of A I ¯ -Planetary Gear Train." In Planetary Gear Trains, 113–18. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/9780429458521-11.

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Conference papers on the topic "Planetary gear"

1

Hu, Yong, David Talbot, and Ahmet Kahraman. "A Load Distribution Model for Planetary Gear Sets." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68354.

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Here, a load distribution model of planetary gear sets is presented capable of dealing with planetary gear sets with any component level and gear set level design variations such as component supporting conditions, different kinds of gear modifications and planetary gear sets with different numbers of equally or unequally spaced planets as well as different gear set kinematic configurations while considering gear mesh phasing. It also accounts for classes of planetary gear set manufacturing and assembly related errors associated with the carrier or gears, i.e. pinhole position errors, run-out errors and tooth thickness errors. Example analyses are provided to indicate the need for a model of this type when studying load distribution of planetary gear sets due to unique loading of the gear meshes associated with planetary gear sets. Comparisons to measurements existing in the literature are provided.

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Nagamura, Kazuteru, Kiyotaka Ikejo, Eiichirou Tanaka, Takamasa Hirai, Toshiyuki Koumori, and Ichiro Kamimura. "Driving Performance of High Reduction Planetary Gear Drive With Meshing of Arc Tooth Profile Gear and Pin Roller." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34245.

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This paper describes a new type planetary gear drive with the high reduction ratio. The planetary gear drive is mechanically similar to a 2S-C type planetary gear, which has two sun gears and one carrier. The planetary gear drive has two pairs of an arc tooth profile gear and a pin roller, which mesh each other. The planetary gear drive has little backlash, a high efficiency, a long fatigue limit, etc., because the tooth contact holds on concave and convex surfaces. In this study, we measured the vibration acceleration, the transmission error, the gear noise, and the efficiency on the new type planetary gear drive by the running test. We discuss and report the driving performance of the planetary gear drive.

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Guo, Yichao, and Robert G. Parker. "Mesh Phasing Relations of General Compound Planetary Gears." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35799.

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This paper systematically studies the mesh phase relations of general compound planetary gears. The mesh phase relations are described by the relative phases between mesh tooth variation functions of all gear meshes. The analysis allows for the fact that compound planetary gears may have gear meshes with different mesh periods. A numbering method is proposed for the accurate definitions of the relative phases in a general compound planetary gear. The phases of all gear meshes relative to the base referred mesh are calculated analytically. Important relations among these relative phases are also studied. The results from this study are important for the clarification of the mesh phasing properties of general compound planetary gears, and they are necessary for the dynamic analysis of compound planetary gears, which involves time-varying mesh stiffnesses.

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Ikejo, Kiyotaka, Kazuteru Nagamura, Tuneji Yada, and Yoshiya Kagari. "Self-Locking of 2S-C Type Planetary Gear Train Composed of External Gears." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86291.

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A planetary gear train is used in a transmission in many fields, because it has a smaller size, a lighter weight, and a larger gear ratio than a conventional gear train. However, a planetary gear train has a lower efficiency than a conventional gear train. Self-locking sometimes occurs, in which case the planetary gear train can not be driven, because of a significant low efficiency. In this study, we theoretically analyzed the efficiency of a 2S-C type planetary gear train composed of external gears, and presented the condition in which the self-locking occurs. Furthermore, we examined the self-locking of 2S-C type planetary gear train composed of external gears using several gear sets with different numbers of teeth by the practical test. As the result, the condition of the self-locking which was analyzed theoretically agreed with experimental result.

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5

Kilani, Mohammad I., Paul C. Galambos, Yousef S. Haik, and Ching-Jen Chen. "Electrostatically Actuated Surface Micromachined Offset Planetary Gear Pump Design." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/mems-23874.

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Abstract An offset planetary pump fabricated in five-level polysilicon surface micromachining is introduced. The pump consists of a ring gear enclosing two planetary gears and an offset sun gear, which generates pumping due to its eccentric rotation. The pump is driven by an electrostatically actuated comb-drive microengine and mechanical power is transmitted to the ring gear through a micro gear train. The paper presents a derivation of pump capacity and the detailed design of its mechanical elements, demonstrating the implementation of relatively advanced mechanical functions in multi-level surface micromachining, including axial roller bearing support, fluidic seal and planetary gear transmission.

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6

Davey, Kent, Travis Hutson, Larry McDonald, Chris Ras, Roy Weinstein, Drew Parks, and Ravi Persad Sawh. "Rotating cylinder planetary gear motor." In 2015 IEEE International Electric Machines & Drives Conference (IEMDC). IEEE, 2015. http://dx.doi.org/10.1109/iemdc.2015.7409105.

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7

Donley, Mark G., and Glen C. Steyer. "Dynamic Analysis of a Planetary Gear System." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0015.

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Abstract Noise reduction in geared systems is usually achieved by minimizing transmission error or by changing the gear train’s dynamic response. While considerable research has been directed in the past to understanding and controlling the transmission error, the same can not be said of the system dynamic response. Recent efforts at modifying the dynamic response to reduce the sensitivity to transmission error have proven to be very rewarding for parallel shaft gearing applications. In this paper, these efforts are extended to planetary gear set applications. A major difference between planetary gear sets and parallel shaft gears is that in planetary gear sets many gear meshes carry load instead of just one. This feature poses a modeling problem as to how to combine responses due to transmission errors at each loaded mesh to determine the total response. A method is proposed in this paper in which transmission errors at different gear meshes are combined into net vertical, net lateral and net tangential transmission errors. A methodology for computing dynamic mesh force response due to these net transmission errors and for identifying critical components that control the gear train system dynamics is presented. These techniques are useful in understanding the effects of system dynamics on gear noise and in developing quiet gear design. To demonstrate the salient features of the proposed method, an example analysis of a transmission with a planetary gear set is presented.

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Shoda, Katsuhiko, Toyoaki Furukawa, Youichi Iwanaga, and Yuji Matsunami. "Experimental Study and Numerical Simulation of Vibration and Noise of Planetary Gears." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14437.

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Abstract This paper presents experimental study and numerical simulation of vibration and noise of a speed increaser, which consist of a star type planetary gears and a planetary type epicyclic gear train. The ring mode vibration of internal gear in the star type planetary gears and torsional vibration of planetary gear in the planetary type epicyclic gear train are measured by use of telemetry system. The influence of tooth profile error for the vibration and the noise is clarified. The numerical simulation is also carried out to evaluate the exciting force and it’s associated vibration. In this method, the coupled vibration of shaft bending, torsional and ring mode vibration of the internal gear are taken into account employing modal synthesis method. The simulation results shows a good agreement with the experimental ones. And it is found that the ring mode vibration magnifies the higher order component of gear mating frequency.

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9

Raghavan, Madhusudan. "The Analysis of Planetary Gear Trains." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99754.

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The Generalized Lever is a new tool in gear train representation. It extends the traditional concept of a lever representation of a planetary gear set to one that includes negative lever ratios. This allows an exhaustive permutation of the nodes of a lever, thereby leading to all possible topological arrangements of a planetary gear train. Consequently, we achieve a compact representation of large families of planetary gear trains, which would otherwise have to be dealt with on a case-by-case basis.

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10

Kahraman, Ahmet, and Sandeep Vijayakar. "Effect of Internal Gear Flexibility on the Quasi-Static Behavior of a Planetary Gear Set." In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/ptg-14364.

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Abstract Effect of flexibility of an internal gear on the quasi-static behavior of a planetary gear set is investigated. A state-of-the-art FEM/semi-analytical nonlinear contact mechanics formulation is employed to model a typical automotive automatic transmission planetary unit. The model considers each gear as deformable bodies, and meshes them to predict loads, stresses and deformations of the gears. Actual support and spline conditions are included in the model. The rim thickness of the internal gear is varied relative to the tooth height and gear deflections and bending stresses are quantified as a function of rim thickness. Influence of rim thickness on the load sharing amongst the planets is also investigated with and without floating sun gear condition. The results are discussed in detail and guidelines regarding the design of a planetary internal gear are presented.

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Reports on the topic "Planetary gear"

1

Parker, Robert G. Planetary Gear Dynamics in Military Helicopters. Fort Belvoir, VA: Defense Technical Information Center, May 2000. http://dx.doi.org/10.21236/ada378777.

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Parker, Robert. Analytical/Computational Investigation of Planetary Gear Dynamics in Rotorcraft Transmissions. Fort Belvoir, VA: Defense Technical Information Center, August 2008. http://dx.doi.org/10.21236/ada499395.

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