A4VG90 Charge Pump 13T
4 month ago
Product details
PMP110 Charge Pump 90R100 Charge Pump
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1. Model Definitions & Classifications
A4VG65 Charge Pump
• A4VG65:
• A4VG: Bosch Rexroth axial piston variable pump series code, designed for closed-loop hydraulic systems.
• 65: Displacement specification (unit: cm³/rev), indicating a nominal displacement of 65 mL per revolution.
• Charge Pump:
• Provides supplemental oil to closed-loop circuits, compensating for system leakage while maintaining pressure stability, cooling, and lubrication.
A4VG110 Charge Pump
• A4VG110:
• 110: Displacement specification (unit: cm³/rev), indicating 110 mL per revolution.
• Charge Pump:
• Typically employs gear or vane pump designs, with displacement matched to main pump requirements (e.g., 10T, 15T models).
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2. Core Function Comparison
【表格】
Function A4VG65 Charge Pump A4VG110 Charge Pump
Leakage Compensation Compensates internal leakage in main pumps/motors to maintain pressure stability. Suitable for higher flow demands with stronger compensation capacity.
Cooling & Lubrication Supplies cooling oil to main pumps/motors and lubricates friction components. Requires larger charge pumps for enhanced heat dissipation.
Control Oil Supply Provides control pressure for variable mechanisms (e.g., proportional solenoids). Supports complex valve groups with stricter pressure stability requirements.
Flush Function Flushes contaminants via charge oil circulation to reduce system pollution risks. Demands higher filtration accuracy (e.g., NAS 1638 Class 6).
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3. Technical Parameter Comparison
A4VG65 Charge Pump – Typical Specifications
• Displacement: 8–12 cm³/rev (common models: 8T, 10T)
• Rated Pressure: 25 bar (up to 30 bar for some models)
• Max Speed: 3000 rpm (shared with main pump drive shaft)
• Flow Range: 0–36 L/min (12 × 3000 / 1000)
• Fluid Temperature: -20°C to +80°C
• Filtration Accuracy: NAS 1638 Class 7 (ISO 4406 18/16/13)
A4VG110 Charge Pump – Typical Specifications
• Displacement: 15–20 cm³/rev (common models: 15T, 18T)
• Rated Pressure: 28 bar (up to 35 bar for some models)
• Max Speed: 2800 rpm (torque verification required for drive shaft)
• Flow Range: 0–56 L/min (20 × 2800 / 1000)
• Fluid Temperature: -15°C to +85°C
• Filtration Accuracy: NAS 1638 Class 6 (ISO 4406 17/15/12)
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4. Structural Feature Comparison
A4VG65 Charge Pump
• Gear Pump Design:
• External gear pump with simple structure, low cost, and suitability for low-pressure charge applications.
• Integrated Mounting:
• Directly installed on the rear of the main pump, sharing the drive shaft to minimize space.
• Seal Material:
• Fluororubber (FKM) shaft seals for high-temperature resistance (150°C) and chemical corrosion resistance.
A4VG110 Charge Pump
• Variable Pump Option:
• Some models feature variable displacement charge pumps for adjustable flow based on system demands.
• Reinforced Bearings:
• Double-row roller bearings to withstand higher radial and axial loads.
• Split Housing:
• Facilitates gear set replacement and improves maintenance efficiency.
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5. Typical Application Scenarios
A4VG65 Charge Pump
• Compact Construction Machinery:
• Mini excavators for stable charge oil supply to travel and swing motors, preventing power loss due to leakage.
• Agricultural Machinery:
• Combine harvesters requiring reliable hydraulic performance under harsh conditions.
A4VG110 Charge Pump
• Large Crane Systems:
• Supports high-flow closed-loop circuits for smooth hoisting and luffing operations.
• Industrial Die-Casting Machines:
• Reduces oil leakage in high-pressure sealing applications, extending mold lifespan.
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