Hydraulic gear motor Group2
2 month ago
Product details
1. Classification & Naming Convention
• Group 2:
Typically refers to a specification category for hydraulic gear motors, possibly based on:
• Displacement range: e.g., 10–50 cm³/rev.
• Pressure rating: e.g., rated pressure210–250 bar, peak pressure280 bar.
• Mounting dimensions: Compliance with ISO or SAE standards, sharing interfaces with other models in the same group.
• Application: Targeted at medium-to-low-load industrial equipment or mobile machinery (e.g., compact excavators, agricultural machines).
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2. Core Structure & Working Principle
• Components:
• Gear Pair: Consists of a driving gear (input shaft) and a driven gear (output shaft), forming sealed chambers through meshing.
• Housing: High-strength cast iron or aluminum alloy for pressure resistance and heat dissipation.
• Bearings: Double-row needle bearings or plain bearings to support shafts and reduce friction.
• End Caps: Seal hydraulic oil to prevent leakage.
• Ports: SAE or BSP threaded connections for bidirectional rotation.
• Working Principle:
Pressurized hydraulic oil enters the meshing zone via the inlet port, driving gear rotation. Oil exits through the outlet port, converting hydraulic energy into mechanical torque.
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3. Key Performance Parameters (Typical for Group 2)
【表格】
Parameter Range/Value Description
Displacement 10–50 cm³/rev Determines output torque; larger displacement = higher torque.
Rated Pressure 210–250 bar Maximum continuous operating pressure; must match system pressure.
Peak Pressure 280 bar Short-term overload capacity.
Speed Range 500–3000 rpm High-speed variants up to 5000 rpm; low-speed types prioritize torque.
Output Torque 30–150 Nm (@250 bar) Torque = Displacement × Pressure × Mechanical Efficiency (0.85–0.92).
Volumetric Efficiency ≥90% Oil leakage rate; affects stability.
Mechanical Efficiency ≥85% Gear friction losses; impacts total efficiency (Volumetric × Mechanical).
Weight 5–15 kg Aluminum housing reduces weight by ~30%.
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4. Typical Applications
• Industrial Equipment:
• Conveyor drives, mixers, injection molding machine clamping units.
• Mobile Machinery:
• Swing mechanisms in compact excavators, agricultural harvester head drives.
• Automation:
• Robot joint actuation, indexing table rotation.
• Special Environments:
• Explosion-proof areas (spark-resistant materials required), underwater operations (IP67+ sealing).
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5. Selection Guidelines
1. Displacement Matching:
• Calculate required displacement using:
Displacement=Required TorqueSystem Pressure×Mechanical Efficiency\text{Displacement} = \frac{\text{Required Torque}}{\text{System Pressure} \times \text{Mechanical Efficiency}}Displacement=System Pressure×Mechanical EfficiencyRequired Torque
2. Pressure Compatibility:
• Ensure rated pressure ≥ system working pressure, with a 20% safety margin.
3. Speed Requirements:
• High-speed applications: low displacement, high RPM.
• Low-speed heavy loads: large displacement, low RPM.
4. Mounting Space:
• Verify axial dimensions and flange standards (e.g., ISO 6022, SAE J744).
5. Environmental Adaptability:
• Low-temperature: use low-viscosity hydraulic oil.
• High-temperature: enhance cooling design.
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6. Common Failures & Maintenance
• Symptoms:
• Low Output: Contaminated oil, internal leakage (reduced volumetric efficiency).
• Abnormal Noise: Gear wear, bearing failure, insufficient oil.
• Overheating: Excessive system pressure, inadequate cooling.
• Maintenance Tips:
• Replace hydraulic oil and filters every 500 operating hours.
• Regularly inspect seals and connections for leaks.
• Avoid prolonged overload (peak pressure ≤ 120% of rated pressure).
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7. Comparison with Other Motor Types
【表格】
Characteristic Gear Motor Vane Motor Piston Motor
Cost Low Medium High
Efficiency Medium (85–92%) Medium-High (90–95%) High (92–98%)
Speed Range Wide (500–5000 rpm) Medium (1000–3000 rpm) Narrow (500–2000 rpm)
Contamination Resistance High (large gear clearance) Medium (vane wear risk) Low (precise clearance)
Applications General industrial, mobile Medium-pressure light loads High-pressure heavy loads
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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3 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch,
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