On the hydraulic pump performance indicators, you understand a few

Hydraulic pump performance parameters, including hydraulic pump pressure, efficiency, speed, displacement, flow, etc., on this, this article and we introduced in detail.

The hydraulic pump is the power component of the hydraulic system. Its function is to provide the pressure oil to the hydraulic system. From the angle of energy conversion, it will be the mechanical energy of the original motive (such as the engine), which can be converted to the pressure energy of the liquid which is easy to be transported. The hydraulic motor belongs to the actuating element, it can convert the pressure energy of the input liquid into the mechanical energy that the output shaft rotates, and it is used to drag the load to do the work. According to the structure form, the hydraulic pump and hydraulic motor can be divided into gear type, vane type, plunger type and so on.

The pressure of hydraulic pump

The working pressure of hydraulic pump refers to the pressure of the pump (or motor) output (or input) oil in actual work, which is determined by the external load. Rated pressure refers to the maximum pressure that can be continuously operated according to the test standards under normal working conditions. The service life of the pump (or motor) will be shorter than the design life if the pressure exceeds the rated pressure. When the working pressure is greater than the rated pressure, called overload.

efficiency

Volumetric efficiency, for hydraulic pumps, refers to the ratio of actual flow to theoretical flow. The hydraulic motor refers to the ratio of theoretical flow to actual flow. Mechanical efficiency, for hydraulic pumps, refers to the ratio of theoretical torque to actual input torque. The actual output torque of the hydraulic motor is a theoretical torque to overcome the torque after friction, so the mechanical efficiency is the ratio of actual output torque to theoretical torque.

speed

Working speed refers to the actual rotation speed of the pump (or motor) at work.

Rated speed refers to the maximum speed under normal pressure for a long period of normal operation. If the pump exceeds the rated speed, it will cause insufficient oil absorption, vibration and noise, the parts will suffer cavitation damage, life reduction. The minimum steady speed is the minimum speed allowed for the normal operation of the motor. At this speed, the motor does not appear crawling phenomenon.

Displacement and flow rate

Displacement refers to the volume of the output (or input) liquid that is changed by the geometric size of the sealing chamber (ml/r / ml) when the pump (or motor) rotates every week. The displacement can be changed into a variable pump (or variable motor) by adjusting the change, and the displacement can not be changed into a quantitative pump (or a quantitative motor). Actual flow refers to the flow at the outlet (or inlet) when the pump (or motor) operates. The actual flow is less than the theoretical flow due to the internal leakage of the pump itself. Due to the internal leakage of the motor itself, in order to achieve the specified speed, in order to compensate the leakage, the actual input flow must be greater than the theoretical flow.

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