Novel calculation method for dynamic excitation of modified double-helical gear transmission

2022 ◽  
Vol 167 ◽  
pp. 104467
Author(s):  
Jin Yang ◽  
Tengjiao Lin ◽  
Zeyin He ◽  
Menghan Chen
Keyword(s):  
Calculation Method ◽  
Helical Gear ◽  
Gear Transmission ◽  
Dynamic Excitation

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.

Multi-Objective Optimal Design of Helical Gear Transmission Based on the Theory of Grey Classification

2012 ◽  
Vol 426 ◽  
pp. 260-264
Author(s):  
Hai Lan Liu ◽  
Xiao Ping Li ◽  
Yan Nian Rui
Keyword(s):  
Optimal Design ◽  
Traditional Method ◽  
Helical Gear ◽  
Gear Transmission ◽  
Grey System ◽  
Multi Objective

Grey Classification is a method which can judge and analyse the matters in the Grey System. It is more reasonable and practical than other Optimal Design. By study of Grey Classification and the traditional method of multi-objective optimal design of helical gear transmission, we found out the most satisfied results.

Analysis of Tribological Characteristics between Plastic and Steel Helical Gear

2011 ◽  
Vol 383-390 ◽  
pp. 2097-2102
Author(s):  
Yi Shu Hao ◽  
Bao Gang Zhang ◽  
Bei Peng
Keyword(s):  
Finite Element ◽  
Helical Gear ◽  
Low Noise ◽  
Gear Transmission ◽  
Temperature Model ◽  
Element Analysis ◽  
Vibration Absorption ◽  
Friction Heat ◽  
Element Simulation ◽  
Plastic Gears

The application of plastic gear is becoming more and more widespread due to its advantages of low noise, shock and vibration absorption and self-lubrication. Friction heat of plastic gear is an important reason for their failure, because the thermal conductivity of plastic is smaller than the metal and the heat generated by friction is an important factor for temperature rising of plastic gear. This paper established a tribology and temperature model of plastic gear transmission by the way of theoretical analysis and finite element simulation of plastic and steel helical gear transmission. The result of finite element analysis shows that friction heat of plastic gears generated during meshing is comparatively large, but the friction of plastic gear and steel gear during the process of meshing is small. The analysis conclusion, contrapose the tribological properties between plastic and steel helical gear, enriched and improved the research in this field and provided some ready-made experiences.

scholarly journals Enhanced application limits for crossed helical gearboxes using new geometries for smaller sliding paths or smaller contact pressures

2019 ◽  
Vol 287 ◽  
pp. 01010
Author(s):  
Christoph Boehme ◽  
Dietmar Vill ◽  
Peter Tenberge
Keyword(s):  
Calculation Method ◽  
Helix Angle ◽  
Helical Gear ◽  
Design Parameters ◽  
Helical Gears ◽  
Positive Effects ◽  
Tooth Stiffness ◽  
Lubrication Condition ◽  
Overlap Ratio ◽  
Helical Gear Pair

Crossed-axis helical gear units are used as actuators and auxiliary drives in large quantities in automotive applications such as window regulators, windscreen wipers and seat adjusters. Commonly gear geometry of crossed helical gears is described with one pitch point. This article deals with an extended calculation method for worm gear units. The extended calculation method increases the range of solutions available for helical gears. In general, for a valid crossed helical gear pair, the rolling cylinders do not have to touch each other. In mass production of many similar gears, individual gears can be reused because they can be paired with other centre distances and ratios. This also allows the use of spur gears in combination with a worm, making manufacturing easier and more efficient. By selecting design parameters, for example the axis crossing angle or the helix angle of a gear, positive effects can be achieved on the tooth contact pressure, the overlap ratio, the sliding paths, the lubrication condition, the tooth stiffness and, to a limited extent, on the efficiency of the gearing. It can be shown that for involute helical gears, in addition to the known insensitivity of the transmission behaviour to centre distance deviations, there is also insensitivity to deviations of the axis crossing angle. This means that installation tolerances for crossed helical gearboxes can be determined more cost-effectively.

Multi-Objective Optimization Design of the Helical Cylindrical Gear Transmission Based on ISIGHT

2014 ◽  
Vol 556-562 ◽  
pp. 1021-1025
Author(s):  
Jing Chen ◽  
Liang Liang Yang ◽  
Zhen Yang Wu
Keyword(s):  
Optimization Design ◽  
Working Life ◽  
Helical Gear ◽  
Gear Transmission ◽  
Production Costs ◽  
Multi Objective Optimization ◽  
Cylindrical Gear ◽  
Integration Platform ◽  
Multi Objective ◽  
The Mathematical Model

Aiming to reduce the volume of helical gear and the heat generated by the friction of meshing place, the multi-objective optimization design model of helical cylindrical gear transmission is established. The calculator is integrated in ISIGHT integration platform, then to solve the mathematical model. The optimization result shows that the volume of helical gear and the friction power loss of meshing place are reduced, the purpose is achieved which will reduce the production costs and prolong its working life.

scholarly journals The kinematics of the rotary into helical gear transmission

2017 ◽  
Vol 108 ◽  
pp. 110-122 ◽  
Author(s):  
Jesús Meneses ◽  
Juan Carlos García-Prada ◽  
Cristina Castejón ◽  
Higinio Rubio ◽  
Eduardo Corral
Keyword(s):  
Helical Gear ◽  
Gear Transmission

Study on Wear Life Prediction of Wind Turbine Helical Gear

2014 ◽  
Vol 904 ◽  
pp. 340-344
Author(s):  
Shi Qiang Wan ◽  
Chun Hua Zhao ◽  
Hai Jiang Dong ◽  
Wei Wang ◽  
Xian You Zhong
Keyword(s):  
Wind Turbine ◽  
Life Prediction ◽  
Optimization Design ◽  
Helical Gear ◽  
Gear Transmission ◽  
Wear Life ◽  
Life Model ◽  
Parameter Optimization Design ◽  
Helical Gear Pair ◽  
Wear Condition

The paper analyzed on wear failure mechanism of the helical gear of wind turbine. Then, according to the characteristics of the gear transmission, the helical gear integrated wear value was calculated. Considering gear transmission steadily, the ultimate integrated wear quantity was determined by gear transmission accuracy. Finally, the helical gear wear life model was derived, which had an important guiding significance on the wear life prediction of helical gear pair, gear parameter optimization design and wear condition monitoring.

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