3 Meanings of Hydraulic Pump Efficiency


Because the hydraulic pump will have flow loss and mechanical friction loss in the process of realizing energy conversion. The size of the power loss is generally expressed by the hydraulic pump efficiency. This article introduces the three meanings of hydraulic pump efficiency.

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Because the hydraulic pump will have flow loss and mechanical friction loss in the process of realizing energy conversion. Therefore, the output power of the hydraulic pump is smaller than the input power. The difference between the two is the power loss. The power loss is represented by the flow loss and the torque loss. The power loss is generally expressed by the efficiency of the hydraulic pump. The efficiency is divided into the following categories:

1. Volumetric efficiency of hydraulic pump

The ratio between the actual flow rate of the hydraulic pump and the theoretical flow rate is called the volumetric efficiency; the volumetric efficiency indicates the ability of the hydraulic pump to resist leakage. He and the working pressure of the hydraulic pump,the size of the friction pair gap in the pump cavity, the year of the working medium and the speed of the hydraulic pump are related. When the working pressure is high or the friction pair trainee is large, or the medium year is low, the leakage volume is large, so the volumetric efficiency is low, and when the rotational speed is low, because the theoretical flow rate is reduced, the proportion of the leakage flow rate increases, making the The volumetric efficiency of the hydraulic pump decreases.

2. Mechanical efficiency of hydraulic pump

The ratio between the theoretical torque and the actual input torque is called the mechanical efficiency of the hydraulic pump. The mechanical efficiency is related to the friction loss. When the friction loss increases, the theoretical output power of the same size needs a larger driving torque, so the mechanical efficiency decreases; when the annual increase of the working fluid or the decrease of the gap, the Friction, or friction between moving parts, increases and mechanical efficiency decreases.

3. Total efficiency of the hydraulic pump

The ratio of the hydraulic power output by the hydraulic pump to the input mechanical power is called the total efficiency of the hydraulic pump. That is, the total efficiency of the hydraulic pump is equal to the product of the volumetric efficiency and the mechanical efficiency.

 

AJA Technology is a hydraulic pumps and motors manufacturer. We meet the needs of users with continuous innovation, high-quality products and perfect services. Our products can help you build your low pressure hydraulic system.If you have any questions about hydraulic pumps or hydraulic systems, please call or email us. We are more than happy to serve you.

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