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Frontiers of Mechanical Engineering

Front Mech Eng    2013, Vol. 8 Issue (1) : 80-87     https://doi.org/10.1007/s11465-013-0362-7
RESEARCH ARTICLE |
Planet position errors in planetary transmission: Effect on load sharing and transmission error
Miguel IGLESIAS, Alfonso FERNáNDEZ(), Ana DE-JUAN, Ramón SANCIBRIáN, Pablo GARCíA
University of Cantabria, 39005 Santander, Spain
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Abstract

In this paper an advanced model of spur gear transmissions developed by the authors is used to study the influence of carrier planet pin hole position errors on the behaviour of the transmission. The model, initially conceived for external gear modeling, has been extended with internal meshing features, and thus increasing its capabilities to include planetary transmission modeling. The new features are presented, along with the summary of the model general approach. The parameters and characteristics of the planetary transmission used in the paper are introduced. The influence of carrier planet pin hole position errors on the planet load sharing is studied, and several static cases are given as examples in order to show the ability of the model. Tangential and radial planet pin hole position errors are considered independently, and the effect of the load level is also taken into account. It is also given attention to the effect on the transmission error of the transmission. Two different configurations for the planetary transmission are used, attending to the fixed or floating condition of the sun, and the differences in terms of load sharing ratio are shown.

Keywords gear      planetary      epicyclic      transmission      load sharing      transmission error     
Corresponding Authors: FERNáNDEZ Alfonso,Email:fernandra@unican.es   
Issue Date: 05 March 2013
 Cite this article:   
Miguel IGLESIAS,Alfonso FERNáNDEZ,Ana DE-JUAN, et al. Planet position errors in planetary transmission: Effect on load sharing and transmission error[J]. Front Mech Eng, 2013, 8(1): 80-87.
 URL:  
http://journal.hep.com.cn/fme/EN/10.1007/s11465-013-0362-7
http://journal.hep.com.cn/fme/EN/Y2013/V8/I1/80
Fig.1  (a) Internal tool profile; (b) internal profile generation; (c) internal profile
Fig.2  Internal contact interference distances
Fig.3  Planetary transmission modeled
SunPlanetRing
Teeth162465
Module4.23 mm4.23 mm4.23 mm
Gear face width25 mm25 mm25 mm
Pressure angle (tool)25o25o25o
Addendum (tool)1.35 m1.35 m-
Deddendum (tool)1.15 m1.25 m-
Tip rounding radius (tool)0.05 m0.05 m-
Tip rounding radius (gear)0.05 m0.05 m0.05 m
Shaft radius20 mm20 mm156.4 mm
Elastic Modulus207 Gpa
Poisson’s ratio0.3
Tab.1  Transmission parameters
Fig.4  (a) LSR for nominal position; (b) LSR for several values of
Fig.5  LSR with
Fig.6  LSR for 400 and 900 N·m and
Fig.7  (a) Sun orbit for ; (b) LSR for
Fig.8  Transmission error of the sun for different values of the
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