Friction and wear analysis of the external return spherical bearing pair of axial piston pump/motor
Friction and wear analysis of the external return spherical bearing pair of axial piston pump/motor
复制标题
轴向柱塞泵/马达外回程球面轴承副摩擦磨损分析
DOI：
10.1051/meca/2019072
复制
发表时间：
2020-01-07
影响因子：
1.2
通讯作者：
Wang, Chuanli
中科院分区：
文献类型：
--
作者：
Deng, Haishun;Hu, Cong;Wang, Chuanli
通过对外固定板与外球面铰链接触面积进行离散化，建立了外回球轴承副任意接触点受力关系的数学模型，并推导了外回球轴承副摩擦功率的数学表达式。分析了外斜盘的倾斜角、泵轴转速、偏心距、弹簧力和离散接触点数量对摩擦功率的影响。结果表明，外回程球面轴承副离散接触点的功率脉动幅值随着外斜盘斜度、泵轴转速和弹簧力的增大而增大；发现总摩擦功率线性增加。然而，发现外回球面轴承副中离散接触点的功率波动幅度随着偏心距的增加而减小，总摩擦功率非线性减小直至达到一定值。离散接触点摩擦功率的分布形状仅受偏心率的影响。如果偏心率较大，则离散点的摩擦功率呈现双峰分布，如果偏心率较小，则呈现多峰分布。
By discretizing the contact area between the external retainer plate and the external spherical hinge, a mathematical model for the force relation of an arbitrary contact point in the external return spherical bearing pair was established and a mathematical expression for the friction power of the external return spherical bearing pair was deduced. The influences of the slant inclination of the external swash plate, pump shaft rotating speed, eccentricity, spring force and number of discrete contact points on the friction power were also analysed. The results show that the power fluctuation amplitude of the discrete contact point in the external return spherical bearing pair increases with increasing slant inclination of the external swash plate, pump shaft rotating speed and spring force; the total friction power was found to increase linearly. However, the power fluctuation amplitude of the discrete contact point in the external return spherical bearing pair was found to decrease with increasing eccentricity, with the total friction power decreasing nonlinearly until reaching a certain value. The distribution shape of the friction power of the discrete contact point is only affected by eccentricity. If the eccentricity is large, the friction power of the discrete point presents a double-peak distribution, whereas if it is small, a multiple-peak distribution is observed.