BM1 Series Gerotor (Or Cycloidal) Hydraulic Motor

BM1 Series Gerotor (Or Cycloidal) Hydraulic Motor

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

BM1 Series Gerotor Hydraulic Motoris a compact, low-speed, high-torque hydraulic power unit featuring an internal gear (gerotor) design based on the one-tooth differential principle, classified as a planetary rotor-type cycloidal gear motor. Below is its detailed overview:

I. Core Structure and Working Principle

1. Structural Components

• Key parts include the output shaft, housing, port plate, planetary rotor gear, stator rollers, and double-ended drum-shaped spline shaft.

• Adopts a modular stator design with rotating rollers instead of an integrated gear ring to minimize leakage. The port plate and output shaft are spring-floated connected for precise oil distribution.

2. Working Principle

• Converts hydraulic energy into mechanical energy through the meshing motion of internal gears, delivering low-speed, high-torque output.

• The port plate distributes pressurized oil to the stator-rotor chambers, enabling continuous rotation.

II. Performance Parameters

1. Displacement and Flow Rate

• Displacement range: 50 mL/rev to 400 mL/rev (e.g., BM1-50, BM1-100, BM1-160 models).

• Rated flow rate: 45 L/min to 68 L/min (varies by model).

2. Pressure and Torque

• Rated pressure: 12.4 MPa to 16.5 MPa (continuous operation).

• Maximum torque: 78 N·m to 521 N·m (e.g., BM1-100 delivers 158 N·m; BM1-400 reaches 521 N·m).

3. Speed Range

• Rated speed: 276 rpm to 1020 rpm (e.g., BM1-200 rated at 547 rpm; BM1-100 up to 1020 rpm).

• Supports wide speed ranges without gearboxes.

III. Product Features

1. Compact Design

• Small footprint and lightweight, enabling direct connection to working mechanisms for space savings.

2. High Efficiency and Stability

• Exceptional low-speed performance with stable rotation, ideal for heavy-duty applications.

• High volumetric efficiency and minimal leakage for reduced energy loss.

3. Strong Adaptability

• Low starting pressure and easy reversing, supporting series/parallel configurations.

• Reliable sealing withstands high backpressure (e.g., 16.5 MPa peak pressure) for leak-free operation.

4. Durability

• Wear-resistant materials for critical components (bearings, spline shafts) extend service life.

• Multiple mounting options (flange, output shaft, port orientations) for flexible integration.

IV. Applications

1. Light-Duty Machinery

• Road sweepers, lawn mowers, leather machines—leveraging its lightweight and cost-effectiveness for rotary drives.

2. Industrial Equipment

• Plastic injection molding screw drives, machine tool spindles, and feed mechanisms requiring low-speed, high-torque solutions.

3. Other Fields

• Marine anchor chain handling, fishing reel operations, and winch drives in harsh environments.

V. Model Selection and Coding

1. Model Coding Rules

• Includes porting type, frame parameters, pressure ratings, etc. (e.g., "BM1-100" indicates 100 mL/rev displacement).

2. Selection Guide

• Choose models based on load torque, speed range, and system pressure.

• Example: BM1-100 for medium loads; BM1-400 for high-load applications.

VI. Comparison with Other Series

【表格】

Series Key Features Typical Applications

BM1 Lightweight, cost-effective, suitable for light machinery Small sweepers, mowers, injection molding machines (low-load equipment)

BM2 High load adaptability, greater torque Agricultural machinery, construction equipment, excavators (heavy-duty applications)

BM3 Higher displacement and pressure ratings for medium/high-pressure systems Coal mining machine hydraulic traction, heavy conveyors (medium/high-pressure systems)

BM4 Ultra-large displacement design, strong instantaneous torque Marine propulsion, large cranes (heavy-duty, high-torque scenarios)

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

3 year

Address: Ningbo, China

Main Product: hydraulic motor , gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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