PVB Series Variable Displacement Piston Pump: Detailed Content Translation
1. Core Overview
• Brand & Series: Manufactured by VICKERS (USA), this axial variable displacement piston pump series is widely used in industries, construction machinery, agricultural equipment, marine systems, mining, and other fields.
• Technical Positioning: Enables precise regulation of flow and pressure through a variable mechanism, optimizing energy efficiency and adapting to dynamic load requirements.
2. Key Technical Parameters
• Displacement Range: Models range from PVB5 (10.55 ml/r) to PVB45 (94.5 ml/r), supporting stepless adjustment from 0-100%.
• Pressure Rating: Maximum operating pressure up to 210 bar (e.g., PVB45), with models like PVB29 designed for 140 bar to meet high-pressure demands.
• Rotational Speed: Rated speed typically 1800 rpm, with some models supporting higher speeds (e.g., PVB5 up to 3600 rpm) for varied operating conditions.
• Weight & Dimensions: Weights vary from 8 kg (PVB5) to 104 kg (PVB45), featuring compact designs compatible with flange or base mounting.
• Control Methods: Supports pressure compensation, flow compensation, load-sensing control, and integrated through-shaft drive for multi-pump configurations.
3. Structure & Materials
• Pump Body Design: Constructed from carbon steel or cast iron, with plungers precision-machined from high-strength alloy steel for durability and sealing integrity.
• Variable Mechanism: Adjusts plunger tilt angle via servo pistons and a variable head to dynamically regulate flow. When the tilt angle reaches zero, the pump can reverse operation, swapping inlet and outlet ports.
• Sealing System: Incorporates high-quality seals and lubrication systems to prevent high-pressure leakage and extend service life.
4. Performance Advantages
• Energy Efficiency: Variable control technology reduces energy waste, improving efficiency by ~25% and lowering cooling system demands.
• Low Noise Operation: Optimized design minimizes noise levels, often matching or falling below motor noise, suitable for noise-sensitive environments.
• Durability: Carbon steel construction is 30% stronger than cast iron, with excellent resistance to corrosion and high temperatures, ensuring longevity of tens of thousands of hours.
• Media Compatibility: Compatible with petroleum-based hydraulic oils, synthetic fluids, water-glycol solutions, and phosphate ester hydraulic fluids for diverse industrial applications.
5. Application Fields
• Industrial Scenarios: Steel mills, power plants, machine tools, injection molding machines, hydraulic presses, etc.
• Construction Machinery: Excavators, cranes, concrete pump trucks, loaders, etc.
• Agricultural Equipment: Tractors, harvesters, irrigation systems, agricultural trailers, etc.
• Marine & Port: Ship hydraulic systems, port cranes, loading/unloading equipment, etc.
• Mining Equipment: Mining machinery, drilling rigs, mine transport vehicles, etc.
6. Maintenance & Troubleshooting
• Common Issues:
• Leakage: Seal aging or wear requires seal replacement and pump body inspection for cracks.
• Pressure Instability: Worn plungers or port plates need repair/replacement.
• Excessive Noise: Loose or worn components require inspection and variable mechanism adjustment.
• Insufficient Flow: Blocked suction lines, contaminated filters, or excessive pump speed require cleaning and speed adjustment.
• Maintenance Practices:
• Regular hydraulic oil replacement to maintain cleanliness and prevent wear.
• System pressure checks to avoid overpressure operation.
• Filter cleaning to ensure unobstructed oil flow and reduce suction resistance.
• Professional services (e.g., Changzhou Sloway) for diagnostics and component replacement.
7. Certifications & Warranty
• Quality Certifications: Compliant with ISO 9001 standards, meeting international safety and performance benchmarks.
• Warranty Period: Typically 1 year or longer, with extended warranty options available from some suppliers.
8. Typical Model Examples
• PVB5: Displacement 10.55 ml/r, pressure 210 bar, weight 8 kg, ideal for small industrial equipment.
• PVB29: Displacement 61.6 ml/r, pressure 140 bar, weight 26 kg, commonly used in construction machinery.
• PVB45: Displacement 94.5 ml/r, pressure 210 bar, weight 50 kg, suitable for heavy-duty industrial applications.
Summary: The PVB Series Variable Displacement Piston Pump stands out for its precision control, energy efficiency, durability, and broad media compatibility, making it a critical component in hydraulic systems—especially under high-pressure, high-load conditions. Users should select appropriate models based on application requirements and ensure regular maintenance for optimal performance.
