Investigation of a design modification for double helical gears reducing vibration and noise

Abstract

To reduce vibration and noise and increase transmission efficiency, a three segment method for modifying the pinion profile was proposed. Cutter surface equations were deduced by changing the shape of the cutter-edge, substituting three segment parabolas for the line. The influence of longitudinal tooth modifications on tooth surface load distributions was discussed. Transmission error minimization and uniformity of tooth surface load distribution were chosen as optimization goals and the modified parameters were obtained by applying the complex method. Finally, an experiment comparing the loaded transmission error, vibration, and noise both before and after modifications was carried out. The results indicate that the modified design is reliable.

An experimental and theoretical study of the dynamic behavior of double-helical gear sets

“…This study was focused not on the DH gear itself but external factors such as the different thickness of internal bearing supporting panels and walls of gearbox to reduce the noise level. Wang et al [23] presented a study on tooth modification of a DH gear pair to reduce motion transmission error. Experiments were limited to gearbox acceleration measurements.…”

“…Kang, A. Kahraman / Journal of Sound and Vibration 350 (2015)[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] …”

Three-dimensional static meshing characteristic analysis and vibration reduction design of a double helical gear

“…By employing tooth surface compensation and bias modifications, load distribution of the left and right tooth surfaces of a double helical gear was improved, while the amplitude of the vibration exciting force of the system was reduced. Wang et al (2010Wang et al ( , 2016 carried out middle convex modification of a double helical gear by modifying the shape of the cutting edge of the tool. According to the established tooth contact analysis (TCA) and loaded tooth contact analysis (LTCA) models of a double helical gear, axial displacement of a pinion under short and long periods was calculated.…”

The derivation of transformation matrix before and after thermal distortion for modification

“…Using TCA and LTCA has become an important way of modification. [4][5][6] The establishment of surface equations of thermal distortion and the derivation transformation matrix between before thermal distortion and after thermal distortion are the key of thermal distortion modification using the method of TCA and LTCA.…”