Transmission Error Analysis of Helical Gears in Consideration of Shaft and Bearing Deformation

2002 ◽  
Vol 26 (10) ◽  
pp. 2194-2200 ◽  
Keyword(s):  
Error Analysis ◽  
Transmission Error ◽  
Helical Gears

Transmission Error Analysis of Helical Gears for Any Load Condition: Practical Calculation Program for Windows PC and Application

2000 ◽  
Author(s):  
Kouhei Saiki ◽  
Takeshi Watanabe
Keyword(s):  
Surface Modification ◽  
Error Analysis ◽  
Load Condition ◽  
Transmission Error ◽  
Tooth Surface ◽  
Analysis Method ◽  
Gear Noise ◽  
Helical Gears ◽  
Light Load ◽  
Tooth Surface Modification

Abstract Recently, the gear noise reduction of car transmission, especially for light load condition, is of increasing importance due to the unsparing needs of silence. Since the transmission error is the exciting source of gear noise, the purpose of this study, is to establish an effective method to analyze the transmission error of helical gears with any 3-D tooth surface cutting error for any load condition including light load. The shaft misalignment due to the assembly errors, and the variable shaft deflection caused by the transmitted torque, are also considered. This paper introduces an exact transmission error analysis method of helical gears, in consideration of the nonlinear tooth separation phenomenon at light load condition. As a result, a practical program for Windows personal computer to calculate the transmission error, is also developed. By using this program, the gear designer can find the optimum shape of tooth surface, and the gear producer can evaluate the quality of his manufactured gears. For confirming the proposed analysis method and the calculation program, the tooth contact pattern of several gear pairs are measured and compared with the calculated result. Especially, it is clarified that the transmission performance of the helicoid bias-in tooth surface modification is better than that of the helicoid bias-out tooth surface modification.

Gear transmission error outside the normal path of contact due to corner and top contact

1999 ◽  
Vol 213 (4) ◽  
pp. 389-400 ◽  
Author(s):  
R. G. Munro ◽  
L Morrish ◽  
D Palmer
Keyword(s):  
Dynamic Test ◽  
Theoretical Models ◽  
Transmission Error ◽  
Helical Gear ◽  
Gear Transmission ◽  
The Novel ◽  
Transmission Systems ◽  
Helical Gears ◽  
Tooth Stiffness ◽  
Top Contact

This paper is devoted to a phenomenon known as corner contact, or contact outside the normal path of contact, which can occur in spur and helical gear transmission systems under certain conditions. In this case, a change in position of the driven gear with respect to its theoretical position takes place, thus inducing a transmission error referred to here as the transmission error outside the normal path of contact (TEo.p.c). The paper deals with spur gears only, but the results are directly applicable to helical gears. It systematizes previous knowledge on this subject, suggests some further developments of the theory and introduces the novel phenomenon of top contact. The theoretical results are compared with experimental measurements using a single flank tester and a back-to-back dynamic test rig for spur and helical gears, and they are in good agreement. Convenient approximate equations for calculation of TEo.p.c suggested here are important for analysis of experimental data collected in the form of Harris maps. This will make possible the calculation of tooth stiffness values needed for use in theoretical models for spur and helical gear transmission systems.

scholarly journals Computerized Design and Generation of Low-Noise Helical Gears with Modified Surface Topology

1995 ◽  
Vol 117 (2A) ◽  
pp. 254-261 ◽  
Author(s):  
F. L. Litvin ◽  
N. X. Chen ◽  
J. Lu ◽  
R. F. Handschuh
Keyword(s):  
Gear Tooth ◽  
Error Function ◽  
Transmission Error ◽  
Low Noise ◽  
Surface Topology ◽  
Helical Gears ◽  
Transmission Errors ◽  
Bearing Contact ◽  
Pinion Gear ◽  
Tooth Surfaces

An approach for the design and generation of low-noise helical gears with localized bearing contact is proposed. The approach is applied to double circular arc helical gears and modified involute helical gears. The reduction of noise and vibration is achieved by application of a predesigned parabolic function of transmission errors that is able to absorb a discontinuous linear function of transmission errors caused by misalignment. The localization of the bearing contact is achieved by the mismatch of pinion-gear tooth surfaces. Computerized simulation of meshing and contact of the designed gears demonstrated that the proposed approach will produce a pair of gears that has a parabolic transmission error function even when misalignment is present. Numerical examples for illustration of the developed approach are given.

scholarly journals Transmission Error Analysis of Conical Involute Gears

2012 ◽  
Vol 78 (791) ◽  
pp. 2624-2634 ◽  
Author(s):  
Kunihiko MORIKAWA ◽  
Masaharu KOMORI ◽  
Masanori NAGATA ◽  
Izumi UEDA ◽  
Zhonghou WANG
Keyword(s):  
Error Analysis ◽  
Transmission Error ◽  
Involute Gears

Transmission error analysis of cycloidal pinwheel meshing pair based on rolling–sliding contact

2021 ◽  
Vol 43 (7) ◽  
Author(s):  
Jian Huang ◽  
Chaoyang Li ◽  
Ye Zhang ◽  
Yanhua Wang ◽  
Bingkui Chen
Keyword(s):  
Error Analysis ◽  
Transmission Error ◽  
Sliding Contact

Modified optimization and experimental investigation of transmission error, vibration and noise for double helical gears

2014 ◽  
Vol 22 (1) ◽  
pp. 108-120 ◽  
Author(s):  
Cheng Wang ◽  
Huan Yong Cui ◽  
Qing Ping Zhang ◽  
Wen Ming Wang
Keyword(s):  
Experimental Investigation ◽  
Transmission Error ◽  
Helical Gears

Low excitation spur gears with variable tip diameter

2021 ◽  
Vol 263 (5) ◽  
pp. 1275-1285
Author(s):  
Joshua Götz ◽  
Sebastian Sepp ◽  
Michael Otto ◽  
Karsten Stahl
Keyword(s):  
Transmission Error ◽  
Spur Gear ◽  
Low Noise ◽  
Spur Gears ◽  
Mesh Stiffness ◽  
Helical Gears ◽  
Axial Forces ◽  
Tooth Width ◽  
Drive Trains ◽  
Static Transmission Error

One important source of noise in drive trains are transmissions. In numerous applications, it is necessary to use helical instead of spur gear stages due to increased noise requirements. Besides a superior excitation behaviour, helical gears also show additional disadvantageous effects (e.g. axial forces and tilting moments), which have to be taken into account in the design process. Thus, a low noise spur gear stage could simplify design and meet the requirements of modern mechanical drive trains. The authors explore the possibility of combining the low noise properties of helical gears with the advantageous mechanical properties of spur gears by using spur gears with variable tip diameter along the tooth width. This allows the adjustment of the total length of active lines of action at the beginning and end of contact and acts as a mesh stiffness modification. For this reason, several spur gear designs are experimentally investigated and compared with regard to their excitation behaviour. The experiments are performed on a back-to-back test rig and include quasi-static transmission error measurements under load as well as dynamic torsional vibration measurements. The results show a significant improvement of the excitation behaviour for spur gears with variable tip diameter.

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