Experimental study of the effect of assembly error on the lightly loaded transmission error of spur gear with crown modification

Xiong Chun,Chen Siyu

doi:10.1177/1461348419854833

Abstract

Experimental measurement of transmission error and vibration of a gear pair with crown modification are developed. With the help of high-precision optical encoder, effects of gear misalignment on unloaded and lightly loaded dynamic transmission error, which are relative to gear rattle, are investigated. The gear mesh misalignment is introduced by eccentric sleeve assembled on the output shaft. Effects of modification and misalignment on the dynamic transmission error, are studied at different load and driving velocity conditions. The experimental results show that, with the increase of the crown amplitude, the peak-to-peak values of dynamic transmission error are decreasing dramatically. Impact deformation or elastic deformation is a very important part of the dynamic transmission error although they are unloaded or lightly loaded. The components in harmonics of meshing frequency will change distinctly comparing cases at low input shaft velocity without and with misalignment, but different phenomena are detected while increasing the input shaft velocity. Finally, the relation between transmission error and gear box vibration is illustrated, and spectrum kurtosis is introduced to reveal gear rattle.

Highlights

Gear noise is normally divided into two parts as gear whine and gear rattle
In order to measure the transmission error in gears, the techniques based on the use of optical encoders have been applied in the experiments of gear rattle or impact.[2,3,4,5,6,7,8,9]
When comparing the amplitudes of dynamic transmission error (DTE) got from numerical integration and experiments, we find that the impact deformation or elastic deformation are very important parts of the DTE

Summary

Introduction

Gear noise is normally divided into two parts as gear whine and gear rattle. Lightly loaded gears have been introduced to exhibit nonlinear behaviors when the surfaces of the gear teeth loose contact and later collide. In order to measure the transmission error in gears, the techniques based on the use of optical encoders have been applied in the experiments of gear rattle or impact.[2,3,4,5,6,7,8,9] The main work of present research is to study the unloaded or lightly loaded gear transmission error experimentally, which is relative to gear rattle.

Results

Conclusion