Nov 27, 2018
From the point of view of energy conversion, the hydraulic pump and the hydraulic motor are reversible hydraulic components. The input of working fluid to any hydraulic pump can make it into a hydraulic motor condition; otherwise, when the main shaft of the hydraulic motor is external When the torque is driven to rotate, it can also be changed to the hydraulic pump working condition. Because they have the same basic structural elements - a closed and periodically variable volume and corresponding oil distribution mechanism.
However, due to the different working conditions of the hydraulic motor and the hydraulic pump, their performance requirements are different, so there are still many differences between the same type of hydraulic motor and hydraulic pump. First of all, the hydraulic motor should be able to be positive and reverse, thus requiring its internal structure to be symmetrical; the speed range of the hydraulic motor needs to be large enough, especially for its minimum stable speed. Therefore, it usually uses a rolling bearing or a static pressure sliding bearing; secondly, the hydraulic motor does not have to have self-priming capability because it operates under the input pressure oil condition, but requires a certain initial sealing property to provide the necessary starting torque. Due to these differences, the hydraulic motor and the hydraulic pump are similar in structure but cannot be reversible.