Orbit Hydraulic Motor BMRW
TheBMRWseries is a low-speed, high-torque orbital hydraulic motor featuring a spool valve distribution design. It is widely used in agricultural machinery, construction equipment, forestry machinery, and industrial applications. Below is a detailed overview of its key characteristics and application scenarios.
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I. Product Features
1. Structure & Materials
• Housing: Made of high-strength ductile iron for durability under intermittent and light-duty loads.
• Output Shaft: Equipped with deep-groove ball bearings to withstand axial and radial forces, enhancing load adaptability.
• Distribution Mechanism: Spool valve design combined with a gerotor gear set for compact size and high power density.
• Sealing Design: Shaft seals can handle high-pressure return oil, supporting series or parallel motor configurations for system flexibility.
2. Performance Specifications
• Displacement Range: Covers51.7 ml/r to 401.9 ml/r(e.g., BMRW-50, BMRW-100, BMRW-200 models), meeting diverse torque requirements.
• Pressure & Torque:
• Continuous operating pressure:14–17.5 MPa(peak pressure up to20 MPa).
• Continuous torque:93–551 N·m(peak torque increased by15–30%, e.g., BMRW-160 delivers380 N·mcontinuously and430 N·mat peak).
• Speed Range: Continuous speed of10–775 rpm, with some models reaching up to1,220 rpm(e.g., BMRW-50), suitable for both low-speed stability and high-speed dynamics.
• Efficiency & Lifespan: Mechanical efficiency exceeds85%, volumetric efficiency reaches98%, and advanced manufacturing processes extend service life.
3. Design Advantages
• Low Starting Pressure: Gerotor gear design reduces starting pressure for rapid system response.
• Noise Reduction: Optimized spool valve distribution minimizes operational noise, ideal for quiet environments.
• Easy Installation: Compact size and standardized interfaces (e.g., G1/2 ports) simplify integration into existing hydraulic systems.
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II. Application Scenarios
1. Agricultural Machinery
• Threshing units in combine harvesters, mowers, feed mixers, etc., leveraging low-speed, high-torque performance for efficient operation.
• Example: TheBMRW-100drives a harvester’s threshing drum, providing194 N·mof continuous torque for heavy-duty tasks.
2. Construction Equipment
• Travel/swing drives for mini excavators, drill rig powerheads, concrete pump truck mixing systems, etc., requiring frequent starts/stops and reversible rotation.
• Example: TheBMRW-200powers a drill rig’s powerhead, delivering390 N·mat310 rpmfor drilling applications.
3. Forestry Machinery
• Logging machines, skidders, wood processing equipment, etc., handling rugged terrain and heavy loads.
• Example: TheBMRW-160drives a logging machine’s sawing system, providing380 N·mof continuous torque for efficient cutting.
4. Industrial Applications
• Screw drives in injection molding machines, conveyor belt rollers, ship deck machinery, etc., demanding high reliability and longevity.
• Example: TheBMRW-80drives an injection molding machine’s screw, delivering152 N·mat600 rpmfor plastic melting and injection.
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III. Model Comparison & Selection Guide
Examples:BMRW-50, BMRW-100, BMRW-200
【表格】
Model Displacement (ml/r) Continuous Torque (N·m) Max Speed (rpm) Typical Applications
BMRW-50 51.7 93 775 Light agricultural machinery, mini drills
BMRW-100 100.5 194 600 Medium-sized harvesters, drill powerheads
BMRW-200 200.9 390 310 Heavy forestry equipment, industrial conveyors
Selection Principles:
• Choose displacement based on load torque requirements; prioritize larger models (e.g., BMRW-200+) for heavy-duty applications.
• Avoid prolonged operation above rated speeds (e.g., BMRW-100 recommended ≤600 rpm continuously).
• Ensure system pressure stays below the motor’s maximum pressure differential (e.g., BMRW-160 continuous pressure ≤16 MPa, peak ≤20 MPa).
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IV. Market Evaluation & Competitive Analysis
1. Strengths
• Cost-Effectiveness: Priced30–50% lowerthan competitors like Eaton 2K or Danfoss OMS series, with comparable performance.
• Ease of Maintenance: Compact design reduces failure points; external drain lines simplify contamination removal.
2. Limitations
• High-Pressure Adaptability: Maximum operating pressure of17.5–20 MPais lower than some premium models (e.g., Eaton 2K series up to30 MPa).
• Extreme-Duty Lifespan: Better durability in intermittent operation (≤6 seconds/minute) than continuous use; select models based on duty cycle.
3. User Feedback
• Agricultural users praise starting torque and low-speed stability, especially in rice/wheat harvesting.
• Industrial users recommend enhancing seal wear resistance for high-dust environments.
