HG Series Internal Gear Oil Pump
3 month ago
Product details
I. Product Overview
The HG Series Internal Gear Oil Pump operates on the principle of internal gear meshing, where an active inner gear drives a passive outer gear to rotate in the same direction, enabling liquid suction and discharge. Its core components include:
• Active Inner Gear (Pinion Gear)andPassive Outer Gear (Ring Gear): The pitch circles are tightly aligned on one side, while the other side is separated by a crescent-shaped spacer.
• Crescent-Shaped Spacer: Divides the pump chamber into suction and pressure chambers, preventing liquid mixing.
• Pump Body: Features inlet and outlet ports; gear rotation creates volumetric changes for fluid transfer.
II. Working Principle
1. Suction Phase: As gears disengage near the inlet port, the interdental volume increases, generating negative pressure to draw in liquid.
2. Pressure Phase: As gears engage near the outlet port, the interdental volume decreases, compressing and discharging the liquid.
3. Continuous Delivery: Continuous gear rotation ensures uninterrupted liquid flow, with output proportional to rotational speed.
III. Technical Features
1. High Volumetric Efficiency:
• Axial and radial pressure compensation design maintains high efficiency even at low speeds (≥50 r/min) and low viscosity.
2. Ultra-Low Noise:
• High-strength cast iron pump body with internal sound-dampening design reduces noise to <70 dB, ideal for noise-sensitive environments.
3. Stable Output:
• Minimal flow and pressure pulsation ensures consistent performance even at low speeds.
4. High-Pressure Design:
• Maximum operating pressure up to 35 MPa (32 MPa for select models), with a wide speed range (up to 3,000 r/min).
5. Long Service Life & Reliability:
• Insensitive to oil contamination; forced lubrication of sliding components reduces wear, extending lifespan to tens of thousands of hours.
6. Modular Design:
• Configurable as twin pumps for independent control of multiple circuits.
IV. Applications
The HG Series is widely used in industrial hydraulic systems, including:
1. Plastic Machinery: Injection molding machines, die-casting machines.
2. Footwear Machinery: Shoe-making equipment hydraulic systems.
3. Metallurgical Equipment: Blast furnaces, continuous casting machines.
4. Forklifts & Logistics Equipment: Forklift hydraulic systems.
5. Servo Frequency Drive Systems: Optimized for energy-saving applications with up to 60% power reduction.
6. Other Fields:
• Petrochemical: Lubricant and asphalt transfer.
• Food & Pharmaceutical: Syrup and chocolate conveying.
• Coatings & Printing: High-viscosity paint delivery.
V. Models & Specifications
• Displacement Range: 8 cc to 160 cc (e.g., HG0-08, HG0-10, HG1-25, HG2-80).
• Pressure Ratings:
• Standard: Up to 25 MPa.
• High-Pressure: Up to 35 MPa.
• Speed Range: 50 r/min to 3,000 r/min.
• Viscosity Handling: 0.2 cP to 1,000,000 cP, suitable for high-viscosity media (e.g., asphalt, lubricants).
VI. Competitive Advantages
1. Wear Resistance & Strength:
• Gear tooth profiles (involute or cycloidal) minimize internal friction and energy loss.
• High-strength materials and precision machining ensure stability under high pressure.
2. Energy Efficiency:
• Supports frequency modulation for adaptive performance, significantly reducing power consumption.
3. Low Maintenance:
• Simple structure with end-face clearance sealing reduces leakage and maintenance costs.
4. Customization:
• Brand customization available (MOQ: 1 unit); non-standard designs supported.
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