Dynamic Simulation Research of Hydro-Mechanical CVT

Abstract

In order to study the complex dynamic characteristics of hydro-mechanical CVT (hydro-mechanical continuously variable transmission), the gearbox machine dynamics simulation model based on AMESim was established for the most important of confluent planetary gear mechanism in the gearbox. Creo2.0 was used to draw 3D virtual prototype, and according to the actual movement of the link, added the corresponding constraints to get the planetary dynamics simulation model based on the multi-body dynamics simulation software ADAMS. Based on the classical formula of gear meshing force, the theoretical values of meshing force of planetary gear were calculated, and the dynamics analysis of planetary gear was carried out by using ADAMS. The simulation results were basically consistent with the theoretical values. It researched the influence of the speed regulation process on planetary gear engagement impact under the three case: speed regulation rate and speed direction, speed regulation under different load levels and different engine speed. The speed regulation under speed regulation rate and different load levels had obvious impact on planetary gear meshing force, the impact degree increased with the increasing of speed regulation rate and load; this work has good engineering and application value, and provides the reference for the structure optimization and adjustment.

KEYWORDS:

• ADAMS
• AMESim
• Dynamics simulation
• Hydro-Mechanical CVT

Additional information

Funding

The research was funded partially by the National Key Research and Development Program of China: [grant number 2016YFD0701103] and Jiangsu Province Key Research and Development Program: [grant number BE2018127].

Notes on contributors

Maohua Xiao

Maohua Xiao, associate professor, Research field: intelligent manufacturing technology and equipment; intelligent control technology of the tractor. Corresponding author. Email: [email protected].

Yuewen Wang

Yuewen Wang is from Nanjing Agricultural University and is a master's graduate student. He works on designing and developing hydraulic gearless gearbox for high power tractors.Email: [email protected].

Fan Zou

Fan Zou is a student from Nanjing Agricultural University, majors in mechanical manufacturing and automation. His research field is intelligent control technology of the tractor.Email: [email protected]

Haijun Zhang

Haijun Zhang obtained master's degree in mechanical manufacturing and automation from Henan University of Science and Technology. He possesses over 20 years of mechanical design and manufacturing and automation experience. He is currently working in Nanjing Agricultural College as an assistant professor. His research field are intelligent manufacturing technology equipment and intelligent control technology of the tractor.Email: [email protected]

Xianhua Li

Xianhua Li obtained bachelor’s degree from Nanjing Agricultural University. She is studying master's in mechanical engineering. Her research interests are modern design theory and methods, advanced manufacturing technology. She received some invention patents and completed some research.Email: [email protected]