A2FM Motor

First, Core Definition and Types

A2FM Motor is a Rexroth axial piston quantitative motor, which belongs to the core components in the field of hydraulic transmission. Its core features are:

1.Quantitative output: fixed displacement, flow rate is proportional to the rotational speed, suitable for scenarios requiring stable power output.

2. Inclined-axis design: the plunger and drive shaft are arranged in an inclined axis, which has a compact structure and high power density.

3. Dual-circuit adaptation: can be used in both open circuits (e.g. construction machinery travel system) and closed circuits (e.g. injection molding machine hydraulic system).

Second, technical parameters and performance

1.Displacement range: covering from 5cc/rev to 1000cc/rev, with typical models such as A2FM10, A2FM63, A2FM160, etc., to meet the needs of small equipment to heavy machinery.

2. Pressure Rating:

Continuous Pressure: 31.5MPa (some models up to 35MPa).

Peak Pressure: 40MPa (short-term capacity).

3. Speed range:

Rated speed: 2200r/min (some models up to 2500r/min).

Maximum speed: 3000r/min (depending on lubrication and cooling conditions).

4. Torque Characteristics: The output torque increases linearly with the pressure difference between the high pressure side and the low pressure side, and the typical torque density reaches more than 0.5N-m/cc.

Third, Structure and Working Principle

1. Core Components:

Skewed Shaft Cylinder: Plunger bores are distributed in a skewed shaft, forming a fixed angle (usually 25°-30°) with the drive shaft.

Conical plunger: with piston ring sealing to reduce leakage and improve volumetric efficiency.

Spherical oil distribution plate: Self-centering design reduces wear and noise.

Variable mechanism (optional): some models are integrated with swash plate variable mechanism to realize flow rate adjustment.

2. Working Process:

Suction Stage: When the plunger is extended, low pressure oil enters into the plunger chamber through the oil distribution plate.

Discharge phase: when the plunger is compressed, the high-pressure oil is discharged through the oil distribution disk to drive the load to rotate.

Energy conversion: Hydraulic energy is converted into mechanical energy with an efficiency of more than 92%.

Fourth, Application Scenarios and Advantages of A2FM motor.

1. Typical applications:

Engineering machinery: excavator slewing device, concrete pump truck distribution valve drive.

Industrial machinery: injection molding machine clamping mechanism, die-casting machine hydraulic system.

Marine field: rudder, deck machinery hydraulic drive.

Agricultural machinery: combine harvester hydraulic traveling system.

2. Core advantages:

High power density: output torque per unit volume is better than that of gear motor.

Long service life: key components are made of forging material, with a service life of more than 8000 hours.

Strong adaptability: can withstand -20℃ to +80℃ working environment, compatible with mineral oil and water glycol.

Fifth, Selection and Maintenance

1. Selection Principle:

Displacement Matching: Select the displacement according to the system demand, avoiding “big horse pulling small car” or overload.

Pressure matching: Ensure that the peak pressure of the motor is lower than the maximum pressure of the system by 10%-15%.

Speed limitation: Long-term operation speed should not exceed 80% of the rated value. 2.

2. Maintenance Recommendations:

Fluid Management: Check fluid cleanliness (NAS 6 or below) every 500 hours.

Seal Check: Replace shaft seal every 1000 hours to prevent leakage.

Noise Monitoring: Abnormal noise (>85dB) may indicate worn oil distributor.

Bosch rexroth A2FM

Rexroth A2FM specs