Simplified Kinematic Analysis of Bevel Epicyclic Gear Trains With Application to Power-Flow and Efficiency Analyses

“…One of its applications is used as power systems of elevator. Planetary gear trains were the subject of intensive research directed at kinematic analysis (Tsai,1985;Hsieh et al, 1989;Hsieh and Yan, 1992;Nelson and Cipra, 2005;Tsai and Huang, 2010), kinematic design (Hsieh , 1999;Hsu, 2002;Hwang, and Huang, 2005;Hsieh et al, 2006Hsieh et al, , 2008Karaivanov and Popov, 2008;Lu and.Duan, 2009;Hsieh, andTang, 2012, 2013), efficiency analysis (Castillo, 2002;Chen and Angeles, 2007;Lu and Duan, 2009;Golenko, 2009;Hsieh and Chen, 2011Hsieh andH.C. Tang, 2013, 2014), and patents (Takahashi , 1980;Klinger et al, 2002;Lin and Lin, 2004;Hsieh andChen, 2012, Hsieh et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The engineering design and efficiency analysis of gear reducer for gear-motor

Hsieh

Chen

2014

Proceedings of the 2014 International Conference on Innovative Design and Manufacturing (ICIDM)

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Recently, the power system equipped in elevator contains motor and gear reducer to get large output torque. In general, the motor and gear reducer are designed and manufactured separately. Its chief advantage is the reducing complexity of the related design process. However, the power system would constitute a variety of problems such as larger amount of components, heavy weight, longer power-path, and large installation space. The purpose of this paper is to present new design concept which integrates motor and gear reducer into one single device and named as "gear-motor". This concept has advantages: 1. less friction loss and higher overall efficiency, 2. smaller volume, less weight, and less axial space, and 3. better dynamic characteristic, less vibration, and less noise. First, according to the combining and eliminating methods of check list, we proposed four design concepts "gear-motor". Based on the concept of train value equation of the train circuit, the 2-stage planetary gear reducer and coupled type gear reducer are synthesized. Then, according to the latent power theorem, the meshing efficiencies of the corresponding gear reducers are analyzed to be 95.46% and 95.87%. Finally, the engineering design is accomplished to illustrate the design methodology. Based on the proposed methodology, all gear-motors can be synthesized.

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“…This method is more accurate in the efficiency calculation, but it has to deduce complex equations of virtual power for different gear trains. Nelson and Cipra [8] employed graph theory to analyze the velocities of bevel epicyclic gear trains and the method is more suitable to software implementation. del Castillo [9] pointed out that even though the kinematic analysis of mechanisms using graphs has been widely developed by many researchers, a clearer way of understanding the relation between the components and power flow in complex planetary gear trains is still in need.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, it is assumed that the only power loss in a multi-flow planetary gear train is from gear meshing and planet bearings. Different graphic methods have been used in power flow analysis in the literature [3,[7][8][9][10]. Esmail and Hassan [3] established a block based on a basic gear pair.…”

Section: Introductionmentioning

confidence: 99%