A6vm200 rexroth motor

The A6VM200 is a representative model of Rexroth's swashplate-type axial piston variable displacement motors. As a high-pressure, high-power-density hydraulic actuator, it is widely used in construction machinery and heavy equipment. Below is its detailed technical analysis:

First, Core Parameters

1. Displacement: 200 cm³/rev (the “200” in the model number denotes displacement specification)

2. Pressure Rating: Nominal pressure 35MPa, maximum peak pressure 40MPa

3. Control Methods: Supports multiple regulation modes including EP2 (electro-proportional control) and HD (hydraulic control)

Second, Structural Features

1. Swashplate design: Utilizes conical piston rotor assemblies, offering a wider swash angle range and higher starting torque compared to swashplate structures

2. Compact integration: Cartridge-style flange mounting allows direct embedding into gearboxes, minimizing space requirements

3. Variable mechanism: Enables stepless displacement adjustment (0-200 cm³/rev) via servo pistons or solenoid valves

Third, Usage Requirements

1. Core Fluid Management

Ultimate Cleanliness: Maintain absolute hydraulic oil cleanliness in all applications. The A6VM's high-precision spherical distribution design means even minute particles cause distributor wear, leading to significant efficiency loss or burnout.

Regular Replacement: Replace hydraulic oil every 1,000 to 3,000 operating hours or every six months to prevent oxidation and degradation.

2. Startup and Commissioning Specifications

Oil Injection and Air Bleeding: Before initial startup or restarting after prolonged shutdown, the motor must be fully filled with hydraulic oil via the housing drain port to prevent dry friction damage to bearings and pistons during startup.

Drain Backpressure Limitation: The drain line must connect directly to the reservoir. Excessive backpressure generated by filters or coolers is strictly prohibited. Excessive drain pressure can directly rupture the main shaft oil seal.

3. Operational Monitoring

Temperature Control: Due to the A6VM200's extremely high power density, oil temperature must be closely monitored to prevent increased internal leakage and lubrication failure caused by excessively low viscosity.

Load Matching: Although the drive shaft can withstand certain radial loads, prolonged excessive lateral forces should be avoided to protect the support bearings.

4. Failure Prevention

Abnormal Noise: If unusual screeching occurs, it typically indicates cavitation or misalignment of the distribution plate. Immediately shut down the machine for inspection.

A6vm variable motor

A6vm shaft seal ring