Elastohydrodynamic Analysis of Grease Lubrication for Cycloid Pin Wheel Transmission of RV Reducer
[1]CHEN Jiangyi,SHI Wenhua,QIN Dongchen,et al.Elastohydrodynamic Analysis of Grease Lubrication for Cycloid Pin Wheel Transmission of RV Reducer[J].Journal of Zhengzhou University (Engineering Science),2022,43(03):98-103.[doi:10.13705/j.issn.1671-6833.2022.03.011]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43卷
Number of periods:
2022 03
Page number:
98-103
Column:
Public date:
2022-04-10
- Title:
- Elastohydrodynamic Analysis of Grease Lubrication for Cycloid Pin Wheel Transmission of RV Reducer
- Keywords:
- cycloid pin wheel transmission; line contact; grease lubrication; instantaneous lubrication characteristics
- CLC:
- TH117. 2
- DOI:
- 10.13705/j.issn.1671-6833.2022.03.011
- Abstract:
- According to the geometry and kinematics theory of the cycloid pin wheel of the RV reducer, the equivalent radius of curvature, entrainment speed and load per unit length of the cycloid pin wheel transmission at different meshing positions were analyzed.Based on the Ostwald model of grease, a linear contact grease lubrication elastohydrodynamic analysis model was established, and the influence of load, entrainment speed and rheological index on the grease film thickness and pressure distribution was analyzed.Numerical analysis of grease lubrication at different meshing positions of the cycloidal pinwheel was carried out, and the shape and pressure distribution of the grease film at the discrete points of meshing are obtained, and then the instantaneous lubrication state of the needle teeth during the meshing process from the root of the cycloidal gear to the tooth tip was obtained by calculating the film thickness ratio, and the poor lubrication area of the cycloidal gear was determined.The results showed that the film thickness and pressure distribution characteristics of grease lubrication and their changes with load and entrainment speed were similar to those of oil lubrication, but from a quantitative point of view, the film thickness of oil lubrication was higher than that of oil lubrication in the same conditions.In the RV reducer cycloid pin wheel drive, as the pin teeth mesh from the tooth root to the tooth tip, the equivalent radius of curvature decreased rapidly and then changed slowly.The entrainment speed first decreases and then slowly increased, and the load per unit length increased rapidly and then slowly decreased.The change in equivalent radius of curvature, entrainment speed and load per unit length also changed the lubrication performance of different meshing points.When the needle teeth mesh at the root of the cycloidal gear, the thickness of the grease film was larger.The lubrication performance from the root of the cycloidal gear to the top of the tooth gradually changed from good to worse, and the top of the cycloidal gear was a poorly lubricated area.The thickness of the grease film increased with the increase of the rheological index.By increasing the rheological index of the grease, the lubrication state of the cycloidal pin wheel transmission could be effectively improved, and the life of the cycloidal wheel could be improved.
- References:
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Last Update:
2022-05-02