[1]陈江义,史文华,秦东晨,等.RV减速器摆线针轮传动脂润滑弹流分析[J].郑州大学学报(工学版),2022,43(03):98-103.
 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.
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RV减速器摆线针轮传动脂润滑弹流分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年03期
页码:
98-103
栏目:
出版日期:
2022-04-10

文章信息/Info

Title:
Elastohydrodynamic Analysis of Grease Lubrication for Cycloid Pin Wheel Transmission of RV Reducer
作者:
陈江义史文华秦东晨王迎佳
文献标志码:
A
摘要:
根据RV减速器摆线针轮的几何学和运动学理论,分析了不同啮合位置的当量曲率半径、卷吸速度和载荷的变化规律;基于线接触脂润滑弹流模型对摆线针轮在不同啮合位置进行润滑数值分析,获得不同负载、卷吸速度以及流变指数下的脂膜形状和压力分布,并分析了针齿从摆线轮齿根到齿顶啮合过程中的瞬时润滑特性,找到了摆线轮的润滑不良区域。结果表明,摆线针轮啮合过程中,由于当量曲率半径、卷吸速度和单位长度载荷的变化使得不同啮合点的润滑状态随之变化;针齿从摆线轮齿根到齿顶润滑性能由好变差,摆线轮齿顶部位为润滑不良区域。进行脂润滑数值分析,获得了啮合离散点的脂膜形状和压力分布,进而通过计算膜厚比得出针齿从摆线轮齿根到齿顶啮合过程中的瞬时润滑状态,确定了摆线轮的润滑不良区域。 结果表明:脂润滑的膜厚、压力分布特征及其随载荷和卷吸速度的变化规律与油润滑的特征规律相似,但从定量角度看,相同条件下油润滑的膜厚要高于脂润滑膜厚;在 RV 减速器摆线针轮传动中,随着针齿从齿根到齿顶的啮合,当量曲率半径快速降低后变化缓慢,卷吸速度先降低后缓慢增大,单位长度载荷快速增大后缓慢降低;当量曲率半径、卷吸速度和单位长度载荷的变化也使得不同啮合点的润滑性能随之变化,针齿在摆线轮齿根部位啮合时脂膜厚较大,从摆线轮齿根到齿顶润滑性能逐渐由好变差,摆线轮齿顶部位为润滑不良区域;润滑脂膜厚随着流变指数的增大而增大,通过增大润滑脂的流变指数,可以有效改善摆线针轮传动的润滑状态,提高摆线轮的寿命。
Abstract:
According to the geometry and kinematics theory of the cycloid pin wheel of the RV reducer,theequivalent radius of curvature,entrainment speed and load per unit length of the cycloid pin wheel lransmis-sion al different meshing positions were analyzed. Based on the Ostwald model of grease,a linear contactgrease lubrication elasltohydrodynamic analysis model was established,and the influence of load,entrainment speed and rheological index on the grease film thickness and pressure distribution was analyzed. Numericalanalysis of grease lubrication al different meshing positions of the cycloidal pinwheel was carried out, and the shape and pressure distribution of the grease film at the discrele points of meshing are oblained, and then theinsltantaneous lubrication state of the needle teeth during the meshing process from the root of the cyeloidal gear to the tooth tip was obtained by calculating the film thickness ratio, and the poor lubrication area of the cycloi-dal gear was delermined. 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 on lubrIcation,but from a quantitative point of view , the film thickness of oil lubrication was higher than that of oil lubricationin the same conditions. In the RV reducer cycloid pin wheel drive , as the pim teeth mesh from the looth rool to the tooth tip,the equivalent radius of curvature decreased rapidly and then changed slowly. The entrainmentspeed first decreases and then slowly increased,and the load per unit length increased rapidly and then slowlydecreased. The change in equivalent radius of curvature,enlrainment speed and load per unit length alsochanged 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 thecycloidal gear to the top of the tooth gradually changed from good lo worse , and the top of the cycloidal gearwas a poorly lubricated area. The thickness of the grease film increased with the increase of the rheologicalindex. By increasing the rheological index of the grease , the lubrication state of the cycloidal pin wheel trans-mission could be effectively improved,and the life of the cycloidal wheel could be improved.
更新日期/Last Update: 2022-05-02