Testing Research on Dynamic Load Sharing Performance of Encased Differential Planetary Gearbox

doi:10.3901/JME.2016.09.028

Abstract

Abstract: An encased differential planetary gearbox is tested to investigate the load sharing performance. The gearbox uses the floating sun, flexible pin and flexible ring simultaneously to distribute load. The tooth root bending strain of the ring in the differential stage and the bending strain of the sun in the encased stage is tested, and a load sharing coefficient tackle method is proposed to analyze tested result from all channels in axial and circle directions. The maximum load sharing coefficient of tested tooth is got, and then the varying of the dynamic load sharing characteristic for the gearbox is studied under different load condition. The mean load sharing coefficient and standard deviation for both the encased and differential stages are calculated and counted, besides, these result is compared with the analytic load sharing coefficient of a main gearbox in an aviation engine. The result shows that the encased stage distributes load more equally than the differential stage, the larger load makes more equal load sharing. The planetary transmission taking the three load sharing methods represents better load sharing performance than that taking one method, the experimental results help design the encased differential gearbox.

Key words: dynamic load sharing, encased differential, load, testing rig, wireless strain

CLC Number:

TH132

TAN Yuanqiang^{1, 2}, HU Congfang^{1, 2}, ZHANG Yuechun³, WANG Wen³, XIONG Shun³, ZUO Huang³. Testing Research on Dynamic Load Sharing Performance of Encased Differential Planetary Gearbox[J]. Journal of Mechanical Engineering, 2016, 52(9): 28-35.

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