Hydraulic pump is a key component in hydraulic system. As the power source of hydraulic system, hydraulic pump is mainly responsible for generating pressure and flow required for liquid flow. Hydraulic pump applies pressure through the piston and pressure generating device to push liquid into the system.

Composition of hydraulic pump

• Pump casing: The pump casing is the main part of the hydraulic pump, in which core components such as rotor are installed. The material is generally cast iron, cast steel or aluminum alloy, with high strength and corrosion resistance, and the material can be replaced according to different usage scenarios.
• Impeller: The impeller is the core component in the hydraulic pump, which generates corresponding pressure by rotation. Generally, the impeller with shallow groove and special tooth shape is adopted, which has good self-priming ability and flow characteristics, and can withstand high pressure and rotation speed.
• Pump shaft: The pump shaft is the core component that converts the rotation of the motor or engine into the rotation of the impeller, thereby generating hydraulic energy. The material is generally high-quality alloy steel with high strength and wear resistance.
• Seals: Mainly include check valves and shaft seals. The check valve prevents the backflow of liquid and ensures the direction and flow of the hydraulic pump. The shaft seal is used to prevent the loss of oil and impurities from entering the hydraulic pump.
• Inlet and outlet valves: The inlet and outlet valves mainly control the valves for the inlet and outlet of the hydraulic pump, and have the function of opening and closing. The ball valve or slide valve and other structural forms can be quickly opened or closed in the hydraulic system.
• Driving components: including electric motors and reducers, etc., provide the power required for the hydraulic pump to drive.
• Coupling: The part that connects the drive device and the pump body is usually made of elastic material and has a certain bending ability. The coupling can play a buffering role and reduce the vibration and noise caused by different speeds.
• Piston and volume chamber: The piston is generally made of precision-machined cast aluminum alloy and is sealed in the volume chamber. The change in the volume in the volume chamber is achieved by changing the position of the piston, thereby forming a boosting function.
• Other components: Depending on the specific type of hydraulic pump, such as gear pumps, vane pumps, plunger pumps, etc., it may also include other components such as gear pairs, eccentric rotors, and vanes.

Working principle of hydraulic pump

The hydraulic pump sucks liquid from the oil tank and compresses the liquid through the internal pressure generating device (such as gears, plungers, blades, etc.). The compressed liquid is pushed to other parts of the hydraulic system under the action of the pump, such as hydraulic motors, hydraulic cylinders and other actuators.

Application of hydraulic pumps

Hydraulic pumps are widely used in various equipment and systems that require hydraulic transmission or control, such as engineering machinery, metallurgical equipment, ships, aircraft, etc. In these applications, hydraulic pumps are usually used in conjunction with actuators such as hydraulic motors and hydraulic cylinders and control elements such as hydraulic valves to achieve complex movements and control requirements.

Performance parameters of hydraulic pumps

The performance parameters of hydraulic pumps include flow, pressure, speed, power, etc. It is necessary to select matching parameters according to the usage scenario to ensure the normal operation of the hydraulic system.