Design principle and modeling method of asymmetric involute internal helical gears

In the field of mechanical engineering, involute helical gears are widely used. Compared with the involute spur gear, helical gears have a high bearing strength, more smooth transmission, less impact and less noise. The internal gear pairs have the features of large transmission ratio, low vibration...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part C, Journal of mechanical engineering science Journal of mechanical engineering science, 2019-01, Vol.233 (1), p.244-255
Main Authors: Shuai, Mo, Shuai, Ma, Guoguang, Jin, Jiabei, Gong, Ting, Zhang, Shengping, Zhu
Format: Article
Language:English
Subjects:
Asymmetry
Bearing strength
Computer simulation
Contact angle
Contact pressure
Cost reduction
Gear teeth
Gear trains
Gears
Helical gears
Internal gears
Low noise
Machining
Mechanical engineering
Modelling
Spur gears
Three dimensional models
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Summary:In the field of mechanical engineering, involute helical gears are widely used. Compared with the involute spur gear, helical gears have a high bearing strength, more smooth transmission, less impact and less noise. The internal gear pairs have the features of large transmission ratio, low vibration, low noise and low wear and hence are widely used in planetary gear transmission systems. In order to meet the requirements of high strength, high speed of the modern gear transmission systems, a new type of asymmetric involute internal helical gears is designed based on conventional involute gears. This paper discusses the gear shaper cutter modeling for machining this new gear, analyzes the formation principle of asymmetric tooth profile and establishes a three-dimensional modeling by SolidWorks. Through MATLAB simulation, pressure angle, tooth number, coefficient of displacement and contact ratio of conventional and asymmetric gear are compared and analyzed. Using ANSYS, two types of gears are compared on strength in order to demonstrate superiority of asymmetric tooth and further study about the asymmetric internal helical gears.
ISSN:0954-4062
2041-2983
DOI:10.1177/0954406218756443