This VQ series high pressure resistant composition vane pumps with high performance are developed for engineering machinery application, especially for walking machinery. The main features are as follows:
1.Adopt the structure of hydraulic balancing composition vanes, making the resistant pressure higher to maximum 21Mpa.
2.Adopt the structure of floating side plate supporting with its function of automatic tolerance compensation, which helps to get pressure balance and high performance under high rotation speed and high pressure.
3.Adopt bimetal flexible material for side plates, which dramatically improves the engagement performance of the gears and thus makes the pump working better and longer.
1. Product Overview
• Brand & Series:
The V/VQ Series Single Pump Vane Pump is a classic product from hydraulic component manufacturers such asDanfossorParker(specific brand confirmation required). It belongs to thefixed displacement vane pumpcategory, meaning its output flow remains constant (non-adjustable).
• Type:
A "single pump" (Single Pump) refers to a single-unit design, suitable for small to medium-sized hydraulic systems, contrasting with the integrated dual-pump structure of a "duplex pump" (Duplex Pump).
• Core Function:
Converts mechanical energy into hydraulic energy through rotor blade rotation, providing stable and continuous hydraulic oil flow for systems requiring high flow precision.
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2. Technical Parameters & Characteristics
• Flow Rate Range:
Typically5~100 L/min(specific model parameters require manufacturer manual reference), meeting demands of various hydraulic system power levels.
• Pressure Rating:
Rated working pressure generally140~210 bar(some high-pressure models reach 280 bar), suitable for medium-to-low-pressure hydraulic systems.
• Speed Range:
Recommended operating speed600~3000 rpm, requiring motor speed matching based on pump displacement and system requirements.
• Efficiency & Noise:
• Volumetric Efficiency: ≥90%
• Mechanical Efficiency: ≥85%
• Noise Level: Typically65~75 dB(A), quieter than gear pumps, ideal for noise-sensitive applications.
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3. Structure & Design
• Vane Pump Working Principle:
The rotor rotates inside the pump body, and vanes extend outward due to centrifugal force, adhering to the stator's inner surface to form multiple sealed working chambers. As the rotor rotates, chamber volumes change periodically, completing oil suction and discharge.
• Key Components:
• Rotor: Core rotating part with vanes embedded in its slots.
• Stator: Inner surface curve determines pump displacement characteristics.
• Vanes: Typically made of high-strength steel or carbon fiber composites to reduce wear.
• Port Plate: Distributes oil suction and discharge channels, ensuring sealing.
• Sealing & Lubrication:
Adopts floating port plate and axial compensation design to minimize internal leakage and extend service life.
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4. Performance Advantages
• Stable Flow:
Fixed displacement pumps provide constant output flow, suitable for precise actuator speed control (e.g., injection molding machines, machine tools).
• Compact Design:
Smaller and lighter than piston pumps, facilitating integration into compact hydraulic systems.
• Cost-Effective:
Lower manufacturing cost than piston pumps, with simple maintenance, ideal for mid-to-low-end hydraulic systems.
• Low Pulsation:
Flow ripple is lower than gear pumps, reducing system vibration and noise.
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5. Applications
• Industrial Equipment:
Injection molding machines, die-casting machines, stamping presses, machine tool hydraulic systems.
• Agricultural Machinery:
Tractor hydraulic steering systems, harvester hydraulic units.
• Construction Machinery:
Small cranes, concrete mixer trucks, aerial work platforms.
• Other Fields:
Ship deck machinery, wind turbine hydraulic systems.
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6. Selection & Configuration Recommendations
• Flow Matching:
Select pump displacement based on actuator (e.g., cylinder, motor) flow requirements to avoid oversizing or undersizing.
• Pressure Adaptation:
Ensure system working pressure does not exceed the pump's rated pressure, with a safety margin.
• Speed Selection:
Choose transmission ratio based on motor speed and pump's allowable speed range to avoid overspeeding or underspeeding.
• Accessory Configuration:
Equip with safety valves, check valves, filters, etc., to enhance system reliability and safety.
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7. Maintenance & Care
• Regular Inspections:
• Check hydraulic oil cleanliness; replace oil and filters periodically (recommended every 1000~2000 hours).
• Inspect pump connections for looseness or leaks.
• Troubleshooting:
• Excessive Pump Noise: May indicate vane wear or port plate damage; requires disassembly inspection.
• Insufficient Output Flow: May result from clogged suction filters or internal leakage; requires cleaning or seal replacement.
• Long-Term Storage:
Store pump in a dry, corrosion-free environment to prevent rotor rusting.
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8. Comparative Analysis
• vs. Gear Pumps:
The V/VQ Series vane pump offers lower noise and flow pulsation but higher cost, suitable for noise-sensitive applications.
• vs. Piston Pumps:
Vane pumps are more cost-effective and simpler in structure but have lower pressure and efficiency, suitable for medium-to-low-pressure systems.
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9. Conclusion
The V/VQ Series Single Pump Vane Pump is a cost-effective, reliable, and stable fixed displacement hydraulic pump suitable for small to medium-sized hydraulic systems. Its constant flow, low noise, and compact design make it widely applicable in industrial, agricultural, and construction machinery. Proper selection and regular maintenance ensure long-term stable operation, providing efficient hydraulic power support for users.
