Why is there a maximum speed limit for hydraulic pumps? The main reasons are as follows:
01#Fast rotating speed affects the life
The higher the speed of operation, will produce more centrifugal force and inertia force, the hydraulic pump gear teeth, vanes, plungers, bearings and seals and other components cause additional stress, which will shorten their service life.
02#Fast rotating speed, sharp increase in heat
When operating at high speeds (the reason for the oil's self-stirring heat), the heat generated inside the hydraulic pump increases, and the hydraulic oil's ability to flow and cool may not be able to keep up, leading to a decrease in lubrication. This will further increase wear and friction, and may cause high oil temperature, oil deterioration, poor sealing performance and other problems.
03#Fast rotating speed, easy to suck air
Exceeding the rated speed of the hydraulic pump may lead to changes in the dynamics and hydromechanical effects, which may make the hydraulic pump suck empty phenomenon, which may lead to oscillations, shocks, resonance and other problems, and ultimately affect the safety and controllability of the system. Therefore, the maximum speed limit of the hydraulic pump is to protect the pump itself, and to ensure the working safety and stability of the hydraulic system. In practice, operators and hydraulic engineers should strictly comply with the instructions and technical specifications of hydraulic pumps to avoid exceeding the maximum speed limit of hydraulic pumps, and to take into account the appropriate safety margins and operating ranges when designing and selecting hydraulic systems.
Why limit the minimum speed? The main reason:
During normal operation, hydraulic pumps need to generate an oil film to reduce the friction between the friction parts, and it is hoped that the flow of oil at the gap will carry away the heat generated inside the pump body due to friction, so as to keep the temperature inside the hydraulic pump stable. Lower speeds may result in reduced lubrication and cooling capacity inside the hydraulic pump, increasing the risk of wear and heat buildup. Therefore, it is necessary to limit the minimum speed of the hydraulic pump.
