NHM Series Hydraulic Motors
3 week ago
Product details
NHM Series Hydraulic Motors
TheNHM Series Hydraulic Motorsare low-speed, high-torque radial piston hydraulic motors designed in accordance with Italian technical standards. They are widely used in construction machinery, marine equipment, oil and coal mining machinery, and other industrial applications. Below is an in-depth overview covering technical features, performance parameters, and application scenarios.
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I. Technical Features
1. Low-Noise Design
• Utilizes an eccentric crankshaft with five/seven pistons to reduce vibration frequency, achieving significantly lower operational noise compared to similar products. Ideal for noise-sensitive environments.
2. High Starting Torque & Low-Speed Stability
• Delivers high starting torque and operates smoothly at extremely low speeds (e.g., 1–5 RPM), eliminating creeping phenomena. Suitable for precision-controlled equipment.
3. High-Reliability Sealing
• Features a patented planar compensation oil distribution plate to minimize internal leakage. Special seals between pistons and cylinder blocks ensure volumetric efficiency >90%, extending service life.
4. Bidirectional Rotation & Axial Load Capacity
• The output shaft supports both forward and reverse rotation while withstanding radial and axial forces, adapting to complex working conditions.
5. High Mechanical Efficiency
• Roller bearings between the crankshaft and connecting rods reduce friction losses, achieving mechanical efficiency >92%.
6. High Power-to-Weight Ratio
• Compact and lightweight for its power output, facilitating easy integration into equipment.
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II. Performance Parameters (Typical Models)
【表格】
Model Displacement (ml/r) Rated Pressure (MPa) Max Pressure (MPa) Rated Torque (N·m) Speed Range (RPM) Weight (kg)
NHM1-80 91 25 32 335 15–1,250 21
NHM2-250 235 16 20 556 8–630 35
NHM3-200 201 25 32 743 8–800 30
NHM6-450 452 25 32 1,672 5–630 67
NHM8-1000 1,000 16 20 2,366 3–300 94
Parameter Notes:
• Displacement ranges from 77–1,000 ml/r to meet diverse torque requirements.
• Rated pressure typically ranges from 16–25 MPa, with a maximum pressure of 32 MPa for high-pressure applications.
• Wide speed range (3–1,500 RPM) supports both low-speed high-torque and high-speed low-torque operations.
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III. Application Scenarios
1. Construction Machinery
• Drives the travel systems of excavators, cranes, and road rollers, leveraging low-speed stability for precise control.
2. Marine Equipment
• Powers deck cranes, winches, and anchor windlasses, handling high loads and frequent bidirectional rotation.
3. Oil & Coal Mining Machinery
• Used in drilling rigs and coal mining machines, withstanding harsh environments (e.g., mud, dust) and heavy-duty operations.
4. Industrial Equipment
• Drives screw mechanisms in injection molding machines, hoists, and gearboxes, requiring high reliability and longevity.
5. Agricultural Machinery
• Equips combine harvesters and tractors, delivering low-speed high-torque output for challenging terrains.
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IV. Selection Guidelines
1. Torque Requirements
• For high-torque applications (e.g., cranes), prioritize models with larger displacement (e.g., NHM6-450). Light-duty uses (e.g., small injection molders) may opt for lower displacement (e.g., NHM1-80).
2. Pressure Ratings
• High-pressure environments (e.g., oil drilling) require models with rated pressure ≥25 MPa (e.g., NHM8-1000).
3. Speed Range
• Low-speed operations (e.g., winches) benefit from models with a lower minimum speed (e.g., NHM2-250, min. 8 RPM).
4. Space & Weight Constraints
• Compact or weight-sensitive equipment (e.g., UAV-mounted systems) should select models with a high power-to-weight ratio (e.g., NHM3-200).
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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hydraulic motor,
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