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Research Papers

Complete Efficiency Analysis of Epicyclic Gear Train With Two Degrees of Freedom

[+] Author and Article Information
Kieran Davies

Department of Mechanical and Aerospace Engineering,  Monash University, Clayton, VIC 3800, Australiakddav1@student.monash.edu

Chao Chen1

Department of Mechanical and Aerospace Engineering,  Monash University, Clayton, VIC 3800, Australiachao.chen@monash.edu

Bernard K. Chen

Department of Mechanical and Aerospace Engineering,  Monash University, Clayton, VIC 3800, Australiabernard.chen@monash.edu

1

Corresponding author.

J. Mech. Des 134(7), 071006 (Jun 08, 2012) (8 pages) doi:10.1115/1.4006526 History: Received September 27, 2011; Revised March 19, 2012; Published June 07, 2012; Online June 08, 2012

Epicyclic gear trains (EGTs) are important mechanical transmissions with many applications. For optimal design and operation of these gear trains, it is necessary to obtain complete efficiency maps of such transmissions. The efficiency of a two degrees of freedom (two-dof) EGT is derived based on the internal power flow and virtual power flow patterns. Expressions for the efficiencies in different operating conditions are obtained and verified by three special conditions.

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Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Two-dof epicyclic gear train

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Figure 2

Generalized power flow diagram for the two-dof epicyclic gear train

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Figure 3

Virtual power flow in the two-dof epicyclic gear train

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Figure 4

Static analysis of the system when 0<u<1

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Figure 5

Power flow diagram for subcase 4A

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Figure 6

Virtual power flow diagram for subcase 4A

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Figure 7

Efficiency plots for u=1/2

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Figure 8

Efficiency plots for u=2

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