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

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.

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

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 On thermal calculation for helical gear transmission system

2020 ◽  
Vol 724 ◽  
pp. 012007
Author(s):  
I S Gabroveanu ◽  
S Cananau ◽  
R F Mirica ◽  
A A Ilies
Keyword(s):  
Helical Gear ◽  
Transmission System ◽  
Gear Transmission ◽  
Thermal Calculation ◽  
Gear Transmission System

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.

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.

Theoretical Method for Calculating the Unit Curve of Gear Integrated Error

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
Zhaoyao Shi ◽  
Xiaoyi Wang ◽  
Zanhui Shu
Keyword(s):  
Differential Equations ◽  
Optimization Algorithm ◽  
Theoretical Method ◽  
Transmission Error ◽  
Helical Gear ◽  
Contact Analysis ◽  
Gear Transmission ◽  
Tooth Contact Analysis ◽  
Static Transmission Error ◽  
Integrated Error

A theoretical method is proposed in this paper to calculate the unit curve of gear integrated error (GIE). The calculated GIE unit curve includes the quasi-static transmission error (TE) curves of the approach stage, the involute stage, and the recession stage of the ZI worm and helical gear transmission. The misalignments between the two axes of the worm and gear, as well as the modifications or errors of the tooth flanks of the gear, are considered in the procedure of calculation. Optimization algorithm is introduced to replace the solving of implicit differential equations of the conventional tooth contact analysis (TCA) method. It is proved that the proposed method is clearer and more convenient than the conventional TCA methods in calculating the GIE unit curve. The correctness and merits of the proposed method are verified by two experiments.

An Improved Model for Calculating the Mesh Stiffness of Helical Gears

2019 ◽  
Author(s):  
Jing Wei ◽  
Shaoshuai Hou ◽  
Aiqiang Zhang ◽  
Chunpeng Zhang
Keyword(s):  
Analytical Method ◽  
Coupling Effect ◽  
Contact Stiffness ◽  
Helical Gear ◽  
Accurate Solution ◽  
Gear Transmission ◽  
Hertzian Contact ◽  
Mesh Stiffness ◽  
Single Tooth ◽  
Helical Angle

Abstract Time-varying mesh stiffness (TVMS) is one of the important internal excitations of gear transmission systems. Accurate solution of meshing stiffness is the key to research the vibration response of gear transmission system. In the traditional analytical method (TAM), the TVMS of single-teeth engaged region consist of bending, shearing, axial compression deformation stiffness, fillet-foundation stiffness, and Hertzian contact stiffness, the TVMS of double-tooth engaged region is the sum of the single-tooth engaged region, which will lead to repeated calculation of the fillet-foundation stiffness. In order to overcome this shortcoming, considering the coupling effect between two pairs of meshing tooth, an improved method of fillet-foundation is adopted to calculate to TVMS of each slice gear. According to the ‘slicing method’, the helical gear is divided into slice gear. Considering the coupling effect of each slice gear, the TVMS of helical gear can be obtained. The improved analytical method (IAM) is verified by comparing with finite element method (FEM) and TAM. Based on the IAM, the effects of the helical angle, face width, the number of gear, and modification coefficient on the mesh characteristics are analyzed. The results show that the IAM is consistent with the FEM and also consistent with TAM in single-tooth engagement. However, there is obviously error with the TAM in double-tooth or multi-tooth engagement.

Nonlinear Dynamic Analysis of Helical Gear Considering Meshing Impact

2012 ◽  
Vol 201-202 ◽  
pp. 135-138 ◽  
Author(s):  
Feng Wang ◽  
Zong De Fang ◽  
Sheng Jin Li
Keyword(s):  
Dynamic System ◽  
Nonlinear Dynamic ◽  
Helical Gear ◽  
Transmission System ◽  
Contact Analysis ◽  
Gear Transmission ◽  
Impact Excitation ◽  
Tooth Contact Analysis ◽  
Meshing Stiffness ◽  
Gear Transmission System

Comprehensive meshing stiffness and single tooth meshing stiffness are calculated by tooth contact analysis and load tooth contact analysis program. The corner meshing impact model is proposed. Nonlinear dynamic model of helical gear transmission system is established in this paper considering time-varying meshing stiffness excitation, transmission error excitation, corner meshing impact excitation, and the backlash excitation. Take the ship’s helical gear transmission system as an example, the mesh impact force is derived and the primary factors that produce noises are discussed. The effects which the mesh impact brings to vibration characteristics of the gear dynamic system are concluded. Meshing impact has an inevitable effect on the vibration of the dynamic system. Impact excitation costs 8.5% in maximum of vibration acceleration response, 31% in maximum of instantaneous acceleration, and 4.9% in maximum of spectral component amplitude.

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