How to choose a double gear pump for the hydraulic system

Choosing the right double gear pump (double gear pump) is crucial to the performance and reliability of the hydraulic system. Here are a few key factors to consider when choosing a double gear pump:

1. Work stress
   Determine the working pressure range of the hydraulic system to ensure that the rated pressure of the gear pump can meet the highest pressure demand of the system. Generally, the gear pump is divided into low pressure, medium pressure and high pressure series, and the appropriate pressure level should be selected according to the system requirements.
2. Traffic requirements
   The flow demand of the hydraulic system determines the displacement of the pump. The pump displacement (usually cc/rev or L/min) is selected according to the operating flow required by the system to ensure that sufficient flow can be provided at the operating speed of the system.
   For dual-gear pumps, it is also necessary to determine the displacement of each pump to meet the flow requirements of different branches.
3. Hydraulic oil type
   Confirm the type of hydraulic oil used in the hydraulic system and select a pump that is compatible with the hydraulic oil. The sealing material and lubrication requirements of the gear pump are related to the characteristics of the hydraulic oil, and it should be ensured that the selected pump can work normally in the hydraulic oil used.
4. Speed
   According to the speed range of the driving source (such as motor, engine, etc.), select the appropriate gear pump. Gear pumps have minimum and maximum working speed requirements, too low speed may lead to increased leakage in the pump, too high speed may lead to increased wear or insufficient oil absorption.
5. Efficiency
   Consider the mechanical efficiency and volumetric efficiency of the pump. The efficiency of the gear pump directly affects the overall efficiency of the hydraulic system, especially for systems that require continuous work for a long time, efficient pumps can reduce energy consumption and extend the life of the equipment.
6. Installation method
   Select an appropriate installation method and interface type (such as flange connection and threaded connection) based on the space and layout requirements of the device. Determine if the pump inlet and outlet position matches the system design.
7. Work environment
   Consider the working environment of the gear pump, such as temperature, humidity, dust and other factors. Ensure that the selected pump can adapt to the environmental conditions of the system and has good durability.
8. Coordination of double pump structure
   In twin gear pumps, two gear pumps share the same drive shaft, which is usually used to drive two independent hydraulic circuits. Ensure that the displacement, pressure and working conditions of the two gear pumps can meet the needs of their respective hydraulic circuits, and will not interfere with each other when working.
9. Manufacturer reputation and after-sales service
   Choose reputable pump manufacturers and brands to ensure reliable product quality and provide good after-sales service, especially considering the convenience of spare parts supply and technical support.