GFT Reducer MCR520 Hydraulic Motor
2 month ago
Product details
the Motor-Reducer Integrated Unit
The motor employsplunger-type power transmission, with a±5' (arc minute) indexing tolerancebetween the cylinder bore and port window. The piston bore indexing accuracy is maintained at±15°.
Post-Machining Adjustments and Treatments:
1. Deburring of Port Edges:After machining, sharp edges of the port windows are rounded to prevent contaminants in the hydraulic fluid from entering the critical clearance gaps between:
• The porting shaft and cylinder bore
• The ball plungers and cylinder bore
2. Heat Treatment of Cylinder Components:
• The cylinder's plunger bores and port windows undergoquenching at 780°C, followed bytempering at 240°C for 4 hours.
• Post-quenchingcarburization depthranges from0.3mm to 0.8mm.
• Surface hardness after heat treatment:HRC 55~60.
3. Surface Finishing of Port Windows:
• Port windows and porting shaft arelappedto achieve surface roughness:
• Ra = 0.2μm(for port windows)
• Ra = 0.4μm(for porting shaft)
• The non-machined port windows retain theiras-cut sharp edgesto maintain structural integrity.
Assembly and Sealing Configuration:
• Theporting shaftis inserted into the cylinder's port bore withminimal clearance.
• Both the cylinder and porting shaft featurestrategically positioned port windowsthat enable oil inlet/outlet through the ball plunger pairs during cylinder rotation.
• Ahydraulic-compatible O-ring sealis installed between:
• One end of the porting shaft
• The housing end coverThis seal serves dual purposes:
• Pressure boundary sealing
• Flexible supportfor the porting shaft, allowing radial float within the port bore.
Key Technical Advantages:
• The integrated design optimizespower densitywhile minimizing leakage paths.
• Precision heat treatment ensureswear resistance(HRC 55-60 surface) andfatigue strength(carburized layer 0.3-0.8mm).
• The lapped surfaces (Ra 0.2/0.4μm) providelow-friction sealing interfaceswithout requiring grinding operations.
External Five-Star Hydraulic Motor: A Comprehensive Overview
TheExternal Five-Star Hydraulic Motor is a specialized hydraulic motor renowned for its robust design and high performance in industrial and mobile applications. Below is a detailed breakdown of its technical features, applications, advantages, and market positioning:
Technical Features
1. High Efficiency & Power Density:
• Volumetric Efficiency: Up to 98% due to piston-ring sealing between pistons and cylinders, minimizing internal leakage.
• Mechanical Efficiency: Exceeds 92% at startup, thanks to rolling bearings for torque transmission and static pressure balancing of piston bases, reducing friction losses.
2. Low-Speed Stability:
• Operates smoothly at speeds below1 rpmwith a wide speed regulation ratio (up to 1:1000), making it suitable for precision tasks like winches or rotary drives.
3. Compact Design:
• Eliminates traditional connecting rods, reducing radial dimensions and weight by 20-30% compared to conventional motors.
4. High Pressure Resistance:
• Withstands pressures up to45 MPa(6,500 psi), enabling use in heavy-duty applications like mining or construction equipment.
5. Durability:
• Heat-treated QT600-3 alloy steel housing (HB 230-250 hardness) and precision-matched rolling bearings ensure long service life.
Applications
• Heavy Machinery: Drive systems for excavators, loaders, and cranes.
• Agricultural Equipment: Powering harvesters, tractors, and irrigation systems.
• Marine & Offshore: Deck machinery, winches, and propulsion systems.
• Industrial Automation: Conveyors, presses, and material handling systems.
• Specialized Vehicles: Differential steering in tracked vehicles (e.g., bulldozers).
Advantages Over Competitors
1. Patent-Protected Innovations:
• Negative Pressure Balancing Technology: Ensures uniform oil flow efficiency at both inlet and outlet ports, reducing heat generation.
• Impact-Resistant Retaining Rings: Avoids fragmentation under high-pressure shocks (tested up to 35 MPa).
2. Maintenance Benefits:
• End-Face Oil Distribution: Eliminates uneven wear common in traditional port designs.
• Self-Lubricating Bearings: Reduces downtime for bearing replacements.
3. Noise Reduction:
• Optimized piston timing and sinusoidal winding designs lower operational noise by 5-10 dB compared to gear motors.
Market Landscape
• Global Dominance: Led by manufacturers like Danfoss, Parker, and Eaton, which hold significant market share in hydraulic components.
• Chinese Market Growth:
• Domestic producers likeNingbo XinhyandHengliare gaining traction with cost-competitive models (priced 30-40% lower than imported alternatives).
• Government initiatives (e.g., "Made in China 2025") are driving R&D in high-end hydraulic components, reducing reliance on imports.
Future Trends
• Electrification Integration: Hybrid systems combining hydraulic motors with electric drives for energy efficiency.
• Smart Controls: IoT-enabled motors with predictive maintenance and real-time performance monitoring.
• Material Innovations: Carbon-fiber composites for lighter yet stronger housings.
Conclusion:
The External Five-Star Hydraulic Motor stands as a cornerstone of modern hydraulic systems, offering unmatched efficiency, reliability, and adaptability. While European and U.S. manufacturers lead in premium segments, Chinese firms are rapidly closing the gap through technological advancements and localized production. For industries requiring low-speed, high-torque solutions, this motor remains a preferred choice.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
Audited supplier
3 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch,
hydraulic system
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