A10VSO Pump

A10VSO pump is a high - pressure axial piston pump, which is especially suitable for application environments with high loads, high pressures, and high - efficiency requirements.

First, detailed introduction of A10VSO pump:

1.Working principle: It adopts a swash - plate structure. The drive shaft drives the cylinder block to rotate, and the pistons in the cylinder block make reciprocating movements along the axial direction. When the volume of the piston chamber increases, oil is sucked in; when the volume decreases, oil is pressed out. By changing the angle of the swash plate, the stroke of the piston can be adjusted, thereby changing the flow of the pump.

2. Structural composition: It is mainly composed of drive shaft, thrust plate, control piston, control valve, pressure side, oil distribution plate, oil suction side, cylinder block, plunger, plunger shoe, rocker, pre - pressure chamber, and return piston.

3. Main specifications: There are various specifications, and the displacement range is usually 18 - 140. The rated pressure is 280 bar, and the maximum allowable pressure is 350 bar. The maximum speed can reach 3300 rpm, and the maximum flow can reach 252 L/min under specific conditions.

4. Control mode: There are many control modes, such as DR (pressure control), DRG (with remote - controlled pressure cut - off valve), DFR (pressure control X - T open), DFR1 (pressure control X - T closed), DFLR (electric control, 24V positive pole), etc.

5. Product features: It has the advantages of low noise, low pressure pulsation, high efficiency, and strong resistance to cavitation. It adopts a through - shaft structure, which can be used in multi - circuit systems, and has a high power/weight ratio.

The A10VSO pump controls the flow rate mainly by adjusting the swash - plate angle, and it can be achieved through various control modes, such as pressure control, flow control, and power control. The specific principles are as follows:

1. Pressure control (DR, DRG): When the system pressure is lower than the set value of the control valve, the pump outputs the maximum flow, acting like a fixed - displacement pump. Once the system pressure exceeds the set value, the pump will adjust to a smaller displacement. The control valve can be adjusted steplessly within the control range to maintain the hydraulic system pressure constant, and the pump only provides the flow required by the system.

2. Two - position control (DG): By connecting the external control pressure to the oil port X, and this pressure directly acts on the variable piston. According to the pressure magnitude, the swash - plate angle of the variable - displacement pump can be set to the maximum or minimum. The pressure at port X is in a 1:4 ratio to the actual pressure at port B.

3. Pressure - flow control (DFR, DFR1): Also known as load - sensing control mode. The load pressure is fed back to the flow controller, and the pump output flow is related to the opening of the valve that controls the load. The pump output pressure changes with the load. When the pump outlet pressure does not reach the set pressure of the constant - pressure control valve, the differential pressure control valve ensures a constant differential pressure across the throttle valve, thus ensuring a constant flow through the throttle valve. When the pump outlet pressure reaches or exceeds the set value of the constant - pressure control valve, pressure cut - off is realized, and the differential pressure control valve no longer functions.

Rexroth A10VSO manual pdf

Rexroth pump A10VSO adjustments