Effect of involute contact ratio on the dynamic performance of spur gear with no tooth profile modification

2003 ◽  
Vol 16 (04) ◽  
pp. 417 ◽  
Author(s):  
Jianhong Wang
Keyword(s):  
Dynamic Performance ◽  
Spur Gear ◽  
Tooth Profile ◽  
Contact Ratio ◽  
Profile Modification ◽  
Tooth Profile Modification

Effect of Tooth Profile Modifications on the Dynamics of High-Contact-Ratio Gears With Different Tooth Spacing Errors

2006 ◽  
Author(s):  
Hsiang H. Lin ◽  
Jing Liu
Keyword(s):  
Computer Simulation ◽  
Dynamic Analysis ◽  
Dynamic Performance ◽  
Tooth Profile ◽  
Dynamic Loads ◽  
Contact Ratio ◽  
Gear Dynamics ◽  
Profile Modification ◽  
Tooth Profile Modification

A computer simulation was conducted to investigate the effectiveness of profile modification for reducing dynamic loads in high-contact-ratio gears with different tooth spacing errors. The simulation examined varying amplitudes of spacing error and differences in the span of teeth over which the error occurs. The modification considered included both linear and parabolic tip relief. The dynamic analysis was performed using a revised version of a NASA gear dynamics code, modified to take into consideration the tooth spacing errors in the dynamic analysis. The findings of this study can be used to design robust tooth profile modification for improving dynamic performance of high-contact-ratio gear sets with different tooth spacing errors.

scholarly journals Modification Method of Tooth Profile of Locomotive Traction Gear Based on Rodent Arm Variation

2019 ◽  
Vol 48 (1) ◽  
pp. 89-97
Author(s):  
Lei Lei ◽  
Haichun Ding ◽  
Liang Xuan ◽  
Meichao Qin ◽  
Siyuan Tian ◽  
...  
Keyword(s):  
Power Transmission ◽  
Tooth Profile ◽  
Moment Arm ◽  
Contact Ratio ◽  
Profile Modification ◽  
Tooth Profile Modification ◽  
Element Simulation ◽  
Load Carrying ◽  
The Moment ◽  
Universal Rule

Locomotive traction gear is the key component to power transmission and speed control in locomotive transmission system, which plays an important role in locomotive running speed and load-carrying torque. Considering that there is not universal rule for the method of modification of locomotive gear at present, in this paper, the tooth profile modification is considered with the combination of the increased contact ratio and the variation of the moment arm of action. Based on the principle of modification, according to the load direction after modification, the change rule of moment arm of action after modification is determined, and the interval range of tooth profile modification is also determined. Taking a certain locomotive traction gear as an example, the results obtained through the method of modification which based on combining moment arm of action variation with the increase of contact ratio and the method based on the traditional empirical formula are compared through finite element simulation respectively, on this account to verify the superiority of the theory of modification, which has important theoretical significance for profile modification of locomotive traction gear.

The Tooth Profile Modification in Gear Manufacture

2007 ◽  
Vol 10-12 ◽  
pp. 317-321 ◽  
Author(s):  
Zheng Li ◽  
K. Mao
Keyword(s):  
Gear Tooth ◽  
Dynamic Performance ◽  
Transmission Error ◽  
Tooth Profile ◽  
Noise And Vibration ◽  
Profile Modification ◽  
Tooth Profile Modification ◽  
Manufacture Process ◽  
Static Performance ◽  
Noise Vibration

The gear design always be focus on analyzing the static performance (strength, stress, friction) and dynamic performance (inertia, noise, vibration), and especially for dynamic, the noise and vibration of gear are big problems. Actually, the main reason of noise and vibration is transmission error between master and slave gears, but the error must exist in any manufacture process. To decrease harmful noise and vibration, the most effective method is “tooth profile modification”, which is by tip relief or root relief for modifying geometry profile of gear tooth to regulate transmission error. In the paper, the transmission error of original model and modified model will be compared to show the gear profile modification will influence the transmission error obviously.

scholarly journals Influence of Tooth Spacing Error on Gears With and Without Profile Modifications

2000 ◽  
Author(s):  
Giri Padmasolala ◽  
Hsiang H. Lin ◽  
Fred B. Oswald
Keyword(s):  
Computer Simulation ◽  
Dynamic Analysis ◽  
Dynamic Performance ◽  
Tooth Profile ◽  
Dynamic Loads ◽  
Error Pattern ◽  
Gear Dynamics ◽  
Profile Modification ◽  
Tooth Profile Modification ◽  
Small Spacing

Abstract A computer simulation was conducted to investigate the effectiveness of profile modification for reducing dynamic loads in gears with different tooth spacing errors. The simulation examined varying amplitudes of spacing error and differences in the span of teeth over which the error occurs. The modification considered included both linear and parabolic tip relief. The analysis considered spacing error that varies around most of the gear circumference (similar to a typical sinusoidal error pattern) as well as a shorter span of spacing errors that occurs on only a few teeth. The dynamic analysis was performed using a revised version of a NASA gear dynamics code, modified to add tooth spacing errors to the analysis. Results obtained from the investigation show that linear tip relief is more effective in reducing dynamic loads on gears with small spacing errors but parabolic tip relief becomes more effective as the amplitude of spacing error increases. In addition, the parabolic modification is more effective for the more severe error case where the error is spread over a longer span of teeth. The findings of this study can be used to design robust tooth profile modification for improving dynamic performance of gear sets with different tooth spacing errors.

scholarly journals 115 Tooth Profile Modification and Transmission Error of Spur Gear Pair

2000 ◽  
Vol 2000.37 (0) ◽  
pp. 29-30
Author(s):  
Makoto TANAKA ◽  
Shigeo YANABE ◽  
Takaki KANOU ◽  
Koreaki ICHINO
Keyword(s):  
Transmission Error ◽  
Spur Gear ◽  
Tooth Profile ◽  
Gear Pair ◽  
Profile Modification ◽  
Tooth Profile Modification
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