A10VSO pump pdf

The A10VSO is a swashplate-type axial piston variable displacement pump designed for open circuits, delivering high power density, low noise, and rapid response flow/pressure control for industrial and mobile hydraulic applications. It is the mainstream choice in sectors such as construction machinery, injection molding, and metallurgy.

First, Core Specifications and Parameters of A10VSO Pump PDF

1. Series: 31 (Displacement: 18/28/45/71/100/140 cm³/r), 32 (45–180 cm³/r)

2. Rated Pressure: 280 bar; Peak Pressure: 350 bar

3. Speed Range: Standard models match common engine/motor speeds; high-speed variants accommodate demanding applications

4. Control Modes: DR (pressure control), DFR/DFR1 (pressure + flow), DFLR (pressure + flow + power), DRG (remote pressure), ED/ER (electro-hydraulic control), etc.

5. Structural Features: Dual-casing drain port, ISO standard mounting flange, through-shaft drive capability (allows series connection with gear pumps/piston pumps), drive shaft capable of withstanding radial/axial loads

Second, Core Structure and Working Principle

1. Rotating Assembly: Drive shaft → Cylinder block → Piston + Sliding shoe; Performs reciprocating motion with swashplate angle to achieve suction/discharge; spherical-pivot shoe + spring-loaded plate maintains pressure, reducing friction and sealing

2. Swashplate and Servo Mechanism: Swashplate tilt angle determines plunger stroke and displacement; servo cylinder/control valve receives pilot pressure signal for stepless tilt adjustment (displacement ≈ 0 at 0°)

3. Distributor Plate: Fixed to pump body, opens suction/discharge ports; alternately connects ports as cylinder rotates to ensure volumetric efficiency; copper alloy/graphite coating provides wear-resistant sealing

4. Housing and Bearings: Cast iron housing offers high rigidity and vibration damping; roller/thrust bearings support high-speed rotating components, handling axial/radial loads

5. Control and Sealing: Regulator integrates pressure/flow/power valves; shaft lip seals, O-rings, and gaskets prevent internal/external leakage

Third, Key Performance Advantages

1. Superior suction performance with cavitation resistance; low pressure pulsation and noise, suitable for noise-sensitive applications

2. Rapid response and high control precision, meeting closed-loop and compound control requirements

3. High power density and long service life with extended maintenance intervals, reducing downtime costs

4. Multiple control modes and through-shaft drive enable flexible system expansion

Fourth, Common Faults and Maintenance Recommendations

1. Increased internal leakage: Wear on distributor plate/shoe/plunger, seal aging; Check system pressure/temperature rise, replace worn parts and seals

2. Swashplate sticking: Contaminated oil, servo valve blockage; Flush system, change oil and filter, inspect servo mechanism

3. Bearing noise/temperature rise: Insufficient lubrication, overload; Check oil level/pressure, oil temperature; Replace bearings if necessary

4. Maintenance: Use recommended hydraulic oil and replace regularly; Maintain oil cleanliness (filter + tank seal); Control oil temperature (30–55°C); Avoid prolonged overload and cavitation.

A10VSO catalog pdf

Variable axial piston pump