Volume 35 Issue 5
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LIN Tengjiao, HUANG He, PENG Jiantao. Temperature field of double helical star gear transmission system in mixed lubrication condition[J]. Journal of Aerospace Power, 2020, 35(5): 1066-1080. doi: 10.13224/j.cnki.jasp.2020.05.018
Citation: LIN Tengjiao, HUANG He, PENG Jiantao. Temperature field of double helical star gear transmission system in mixed lubrication condition[J]. Journal of Aerospace Power, 2020, 35(5): 1066-1080. doi: 10.13224/j.cnki.jasp.2020.05.018
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Temperature field of double helical star gear transmission system in mixed lubrication condition

doi: 10.13224/j.cnki.jasp.2020.05.018

  • State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China

  • Received Date: 2019-11-05
  • Publish Date: 2020-05-28
    Abstract
  • For double helical star gear transmission system, the proportion of load carried by film and the friction coefficient at different meshing positions on tooth surface with different roughness were calculated based on thermoelastohydrodynamic lubrication theory and asperity contacting analysis. In combination with the calculation of contact load and slip velocity, the distribution of heat flux on tooth surface was analyzed. By simulating the flow field of gear transmission system in spray lubrication, the oil distribution and wall heat transfer coefficient of gears’ surfaces were determined. Then steady-state thermal finite element model of gear transmission system was built based on the results of flow field simulation and mixed thermoelastohydrodynamic analysis, and temperature distribution of gears’ surfaces was analyzed through simulation. Results showed that thicker central oil film got higher proportion of load carried by film. The comprehensive friction coefficient was affected by geometric parameters and load, and increased at first and then decreased from pitch point to addendum and dedendum region for internal and external gears. The sun gear got higher temperature than others with high meshing frequency and poorer heat dissipation, as the high temperature zone was located in addendum and dedendum, and the temperature rose obviously as roughness increased.

     

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