scholarly journals Study on the load-sharing characteristics of face-gear four-branching split-torque transmission system

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110099
Author(s):  
Dong Hao ◽  
Zhang Hao-qin ◽  
Zhao Xiao-long ◽  
Duan Ling-ling
Keyword(s):  
Load Sharing ◽  
Transmission System ◽  
Torsional Angle ◽  
Analysis Model ◽  
Radial Limit ◽  
Face Gear ◽  
Tooth Contact Analysis ◽  
Torque Transmission ◽  
Manufacturing Errors ◽  
Split Torque

In order to solve the load-sharing characteristics of face-gear four-branching split-torque transmission system (FGFBSTTS), the static load-sharing mechanical analysis model was established. In the model, the deformation coordination conditions of torsional angle and torque balance condition were considered. By using Loaded Tooth Contact Analysis (LTCA) technology of face gear and herringbone gear, the time-varying meshing stiffness was calculated. The influences of manufacturing errors, installation errors, I-stage pinion floating, II-stage pinion spline clearance floating, and radial limit ring clearance floating on the load-sharing characteristics are analyzed. The results show that the LTCA technology is more accurate to reflect the load-sharing characteristics of each meshing position. When the I-stage pinion and the II-stage pinion floated at the same time, the best load-sharing characteristics can be obtained. The load-sharing characteristics affected by manufacturing errors showed obvious periodic change. The radial limit ring plays a better auxiliary role in load-sharing characteristics. The theoretical results were compared with the experiments to verify the correctness of the theoretical analysis. The research results can provide a theoretical basis for the optimal design of the load-sharing structure, error control, and assembly of the face gear four branch transmission system.

scholarly journals Floating Shaft Load Sharing Method for Face Gear Split Torque Transmission System

2013 ◽  
Vol 5 (12) ◽  
pp. 3386-3392 ◽  
Author(s):  
Ruifeng Wang ◽  
Ning Zhao ◽  
Li Tao ◽  
Qingjian Jia ◽  
Hui Guo
Keyword(s):  
Load Sharing ◽  
Transmission System ◽  
Face Gear ◽  
Torque Transmission ◽  
Split Torque

scholarly journals Investigation of Load Sharing and Dynamic Load Characteristics of a Split Torque Transmission System with Double-Helical Gear Modification

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Xuan Liu ◽  
Zongde Fang ◽  
Haitao Jia ◽  
Ning Zhao ◽  
Yunbo Shen ◽  
...  
Keyword(s):  
Dynamic Load ◽  
Load Sharing ◽  
Helical Gear ◽  
Transmission System ◽  
Time Varying ◽  
Tooth Contact Analysis ◽  
Meshing Stiffness ◽  
Torque Transmission ◽  
Load Characteristics ◽  
Split Torque

A new dynamic model for a two-input two-path split torque transmission system which considers meshing error, time-varying meshing stiffness, and meshing-in impact is proposed. Time-varying meshing stiffness and meshing-in impact of each gear pair are accurately calculated based on tooth contact analysis and loaded tooth contact analysis. Equivalent displacements of eccentricity error and installation error along the meshing line of second- and third-stages gears are derived. The modified tooth surface of a third-stage double-helical gear is obtained by optimizing the amplitude of static loaded transmission error and meshing-in impact via nondominated sorting genetic algorithm-II (NSGA-II). Influence of modification on load sharing and dynamic load characteristics of split torque transmission system is investigated. The results indicate that the system’s dynamic meshing force increases when meshing-in impact is accounted for, which is unfavorable for the transmission. Following the modification of a double-helical gear, the dynamic load characteristics of the split torque transmission system are significantly improved, while its load sharing characteristics are improved to a certain extent.

Load Sharing of Parallel Shaft Split Torque Transmission System

2012 ◽  
Vol 490-495 ◽  
pp. 2231-2235 ◽  
Author(s):  
Ning Zhao ◽  
Rui Feng Wang ◽  
Li Tao ◽  
Qing Jian Jia
Keyword(s):  
Equations Of Motion ◽  
Load Sharing ◽  
Transmission System ◽  
Variable Step Size ◽  
Step Size ◽  
Runge Kutta Method ◽  
Torque Transmission ◽  
Torque Load ◽  
Fifth Order ◽  
Split Torque

Parallel shaft split torque Transmission system Split torque Load sharing Abstract: The Newton method was applied to develop a system of equations of motion, the mathematical model includes stiffness of shaft supporting, position of gears, backlashes, time-varying stiffness, composite transmission errors, damping. The model was solved by variable step size forth/fifth-order Runge-Kutta method. The load sharing was affected obviously by asymmetry of gear backlashes, stiffness of shaft supporting and gear position

Analysis of Split Torque Transmission System Load Sharing

2012 ◽  
Vol 246-247 ◽  
pp. 78-83
Author(s):  
Rui Feng Wang ◽  
Ning Zhao ◽  
Qing Jian Jia ◽  
Li Tao
Keyword(s):  
Gear Tooth ◽  
Load Sharing ◽  
Transmission System ◽  
Variable Step Size ◽  
Step Size ◽  
Runge Kutta Method ◽  
Torque Transmission ◽  
Fifth Order ◽  
Assembly Error ◽  
Split Torque

A calculative model for parallel shaft split torque transmission system is presented, the model includes stiffness of shaft supporting, time-varying stiffness, damping, gear eccentric error errors, bearing eccentric errors, gear tooth thickness error, assembly error. Dynamic analytic model is built using the theory of equivalent mesh error and Newton method. The model was solved by variable step size forth/fifth-order Runge-Kutta method. The result shown all error affect load sharing in different way, one error deduced sharply can not improve load sharing obviously.

scholarly journals Application of Face-Gear Drives in Helicopter Transmissions

1992 ◽  
Author(s):  
F. L. Litvin ◽  
J.-C. Wang ◽  
R. B. Bossler ◽  
Y.-J. D. Chen ◽  
G. Heath ◽  
...  
Keyword(s):  
High Speed ◽  
Experimental Studies ◽  
Contact Ratio ◽  
Face Gear ◽  
Tooth Contact Analysis ◽  
Tooth Contact ◽  
Transmission Design ◽  
Torque Transmission ◽  
Gear Drives ◽  
Split Torque

Abstract The use of face gears in helicopter transmissions was explored. A light-weight, split torque transmission design utilizing face gears was described. Face-gear design and geometry were investigated. Topics included tooth generation, limiting inner and outer radii, tooth contact analysis, contact ratio, gear eccentricity, and structural stiffness. Design charts were developed to determine minimum and maximum face-gear inner and outer radii. Analytical study of transmission error showed face-gear drives were relatively insensitive to gear misalignment, but tooth contact was affected by misalignment. A method of localizing bearing contact to compensate for misalignment was explored. The proper choice of shaft support stiffness enabled good load sharing in the split torque transmission design. Face-gear experimental studies were also included and the feasibility of face gears in high-speed, high-load applications such as helicopter transmissions was demonstrated.

Sign in / Sign up

Export Citation Format

Share Document