Flow and displacement of hydraulic pump

Displacement refers to the volume of liquid discharged (or input) obtained by the change of the geometric dimensions of the sealed cavity per revolution of the pump (or motor). The common unit is ml/r (ml/revolution). The displacement can be changed by adjusting to become a variable pump (or variable motor), and the displacement cannot be changed to become a fixed pump (or fixed motor).

The actual flow rate refers to the flow rate at the outlet (or inlet) when the pump (or motor) is working. Due to the internal leakage of the pump itself, its actual flow is less than the theoretical flow. Because the motor itself also has internal leakage, to achieve the specified speed, in order to compensate for the leakage, the actual input flow must be greater than the theoretical flow.

Hydraulic pump efficiency

Volumetric efficiency, for hydraulic pumps, refers to the ratio of actual flow to theoretical flow. For hydraulic motors, it refers to the ratio of the theoretical flow to the actual flow.

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

The total efficiency refers to the ratio of the output power of the pump (or motor) to the input power. The total efficiency is equal to the product of volumetric efficiency and mechanical efficiency.

      Guangzhou Sub-Group Auto parts Co.,Ltd was established in 2000 and is located in baiyun district, Guangzhou, China. We have China's first-class truck auto parts professional capacity and export trade capacity. We have a strong and professional auto parts research team, professional control of product quality and suitable models. We supply high quality auto parts at the most competitive prices. Since its establishment, Sub-Group Auto parts has been dedicated to the production of all kinds of plastic parts for trucks, with perfect production capacity.

      In 2008, established the foreign trade department of auto parts, mainly operating Volvo, scania, FAW, weichai, cummins, dongfeng, American and Chinese auto parts and engineering machinery parts. We have the ability to develop new products that are not in our catalog, and we will do that in a timely manner and do our best to meet customer needs. Our production and development costs are very reasonable. Please contact us according to your special needs. We are glad to cooperate with you. At the same time, our highly skilled and qualified employees are proud to be a supplier of spare parts to global customers.

       We have a strong sourcing capability in the Chinese market. We fully understand the needs of our customers. We offer high quality products, competitive prices and first class service. We hope to establish good business relations and friendship with you in the near future.

FAQ

1. who are we?
We are based in Guangdong, China, start from 2015,sell to Mid East(30.00%),Central America(20.00%),North America(10.00%),Eastern Asia(10.00%),Domestic Market(5.00%),South Asia(5.00%),Northern Europe(5.00%),South America(5.00%),Southeast Asia(5.00%),Eastern Europe(5.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?

Mercedes Benz, Man, Volvo, IVECO, DAF, SCANIA, Renault, Ford
FUSO, UD, NISSAN, HINO, ISUZU
FAW, CAMC, JAC, FOTON, DAYUN, DongFeng

CAT,CAT,Komatsu, Hyundai, Doosan, Hitachi, John Deere, Daewoo, Case, XCMG, Sany

4. why should you buy from us not from other suppliers?
1.Our company has 20 years experience in auto parts development and production. Main projects, China Heavy Truck: Weichai, FAW, Yuchai... and imported trucks: Mercedes-Benz, Volvo, MAN, Scandinavia... and construction machinery: Komatsu, Cummins, etc.

5. what services can we provide?
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