What should be paid attention to when selecting hydraulic vane pump?

1. Select the type of hydraulic pump according to the application situation. Generally, in the hydraulic system of machine tools, double-effect vane pressure-limiting variable vane pump is generally selected. However, gear pumps with strong anti-pollution ability are generally selected among road repair machinery, port machinery and small construction machinery. It is generally selected for occasions with large load and power.

2. See if the flow rate of the hydraulic pump is compatible with the variable control method to select the sample hydraulic pump. Blade system, axial plunger pump and radial plunger pump have fixed displacement pump as well as variable displacement pump. Variable methods include constant voltage, constant flow, multistage variable, constant power and total power conditioning, etc. Variable control methods include manual, motor, electric, hydraulic and electro-hydraulic methods, which can be directly controlled or controlled by servo valves.

3. Pay attention to the difference between parallel pump and series pump. The gear pump and vane pump can also be made into several pumps connected in parallel, and double or triple pumps to a drive shaft can be used. They can also be connected in series into multi-stage pumps. When the flow rate of the hydraulic system changes greatly during a working period, multiple pumps can be selected. Multi-connected pumps generally have one oil suction port and multiple oil outlets. The pressure oil at each oil outlet can supply oil to different performance elements of the system respectively, or can supply a certain performance element together.

4. When selecting the model of hydraulic pump, it is forbidden to neglect other requirements of the system for hydraulic pump, such as component, quotation, service life and reliability, device method of hydraulic pump, connection method between hydraulic pump and prime mover, shaft extension method of hydraulic pump, whether it can accept certain radial load, connection method of oil port, etc.

5. Taboo neglects the promise, maintenance and spare parts supply of the manufacturer of the hydraulic pump. These are also questions that need extra consideration when selecting the hydraulic pump.

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