The A4VSO series pump is a variable - displacement pump with an axial - piston swash - plate structure produced by Rexroth, Germany. It is designed for use in hydraulic transmission systems. The flow rate is proportional to the driving speed, and the displacement can be infinitely adjusted. As the inclination angle of the swash plate changes from zero to the maximum value, the output flow rate increases. Changing the inclination angle of the swash plate across the centerline can smoothly change the flow direction of the flow rate.
This pump has excellent suction characteristics, a sensitive control response, and is specially designed with long - life, high - precision aviation - grade full - roller bearings. In addition, it also has the advantages of low noise, a long service life, an excellent power - to - weight ratio, and a through - shaft structure that can be stacked into a combined pump.
The nominal pressure of the A4VSO series is 350 bar, and the maximum pressure is 400 bar. It is suitable for open - circuit operation. It is widely used in various industrial fields, including but not limited to gantry planers, pullers, hydraulic presses, engineering machinery, concrete pump trucks, excavators, road rollers, ceramic presses, forging machines, automotive production line stamping machines, and steel mill hydraulic systems.
Advantages and Features:
1. Axial piston variable displacement pump with a swash plate structure, specifically designed for efficient hydraulic drives in open circuits.
2. Widely used in industries such as ceramic presses, refractory material presses, iron and steel and forging presses, metallurgical machinery, mining machinery, marine machinery, petroleum equipment, engineering, and machine tool control, etc.
3. Displacement specifications: 40, 71, 125, 180, 250, 300, 355, 500, 750 milliliters per revolution.
4. Equipped with a swash plate angle indicator.
5. Excellent suction characteristics.
6. Sensitive control response.
7. Specially designed long-life, high-precision aviation-grade full roller bearings.
8. Low noise, long service life, and excellent power-to-weight ratio.
9. Through-shaft structure, which can be stacked into a combined pump.
10. The flow rate of the hydraulic pump is proportional to the pump's rotational speed and displacement. Adjusting the swash plate inclination angle enables stepless adjustment of the displacement.
11. A complete range of variable displacement forms are available. Commonly used ones include DR/DRG constant pressure control, LR hyperbolic constant power automatic control, and EO2 electrical proportional control.
12. The rated working pressure can reach 350 Bar (35 MPa), and the peak pressure is 420 bar (42 MPa).
13. Applicable media: Mineral oil, water glycol. The cleanliness requirement is NAS9 level.
The detailed application fields of the A4VSO series pumps are as follows:
Engineering Machinery
- Excavators: The A4VSO pump provides high - pressure and high - flow hydraulic power for excavators, enabling the boom, arm, and bucket to move flexibly and with high efficiency, meeting the requirements of various working conditions such as digging, loading, and unloading.
- Road Rollers: It is used to drive the vibration mechanism and traveling system of road rollers. The accurate control of the pump's flow and pressure ensures the compaction quality of the road surface and the smooth operation of the rollers.
Industrial Manufacturing
- Forging Machines: In forging production, the A4VSO pump supplies large - flow hydraulic oil to the forging press, providing the necessary pressure and force for forging metal materials to help shape high - quality forgings.
- Ceramic Presses: For ceramic presses, the pump can accurately control the pressure and flow of the hydraulic system, ensuring the uniform pressing of ceramic blanks and improving the quality and production efficiency of ceramic products.
Metallurgical Industry
- Steel Mills: In steel mills, the A4VSO pump is used in the hydraulic systems of rolling mills, continuous casting machines, etc. It provides stable hydraulic power for the precise control of the rolling process and the operation of the continuous casting equipment, helping to improve the quality of steel products.
- Metallurgical Machinery: For metallurgical machinery such as ladle turrets and charging equipment, the pump can meet their high - pressure and large - flow hydraulic requirements, ensuring the normal operation of these devices in the metallurgical production process.
Mining Industry
- Mining Excavators: Similar to engineering excavators, mining excavators also rely on the A4VSO pump to provide powerful hydraulic power to complete the digging and loading of minerals. The pump's reliability and durability are crucial for long - term operation in harsh mining environments.
- Mining Conveyor Systems: The pump is used in the hydraulic drive system of mining conveyor belts to ensure the stable operation of the conveyor belts, enabling the efficient transportation of minerals.
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