轴向柱塞泵平面配流副的摩擦转矩特性试验研究

为研究配流机构工况参数对摩擦转矩的影响,根据轴向柱塞泵配流机构的受力特点,给出配流盘与缸体转子之间固体或边界润滑、全空间油膜润滑状态下的摩擦转矩构成及相应的理论计算.在不同油膜厚度、配流副转速下实测配流副的摩擦转矩变化,结合缸体转动周期讨论摩擦转矩变化过程及与配流副磨损形式的对应关系.结果表明,载荷是配流副摩擦转矩变化的根本因素；配流副正常磨损通常表现为配流盘吸油槽与压油槽间的不均匀磨损；油膜厚度对摩擦转矩的影响显著,但并不是单调反比例关系,5 μm的油膜厚度引起近10%的摩擦功率损失.由配流副摩擦转矩的实测及与理论计算的对比，得出配流副摩擦转矩造成的整泵机械功率损失.

Experimental study of frictional torque properties of plane port pairs in axial piston pump

According to the load behavior of the porting mechanism in axial piston pump, frictional torque’s composition and theoretical calculation were presented under solid lubrication, boundary lubrication and whole film lubrication between port plate and cylinder block. The frictional torque of the port pair was tested under different oil film heights and rotation speeds to study the effects of working condition parameters on frictional torque. The relationship between the change process of frictional torque and the wear pattern of port pair in one rotor period was discussed. The approximate percent of the whole pump mechanical power loss due to the port pair’s frictional torque was reached. The results show that load is the fundamental factor resulting in variation of the frictional torque, and that the uneven wear in the region connecting sucking slot and delivering slot is a normal appearance in port pairs. The oil film height significantly affects the frictional torque, but it does not work as monotonic inverse proportion relationship. A film height of 5 μm causes about 10% frictional power loss．