K3VL80 Negative Control Hydraulic Pump
2 month ago
Product details
K3VL80 Negative Control Hydraulic Pump
K3VL80 Electric control Hydraulic Pumps
1. Product Overview
TheA10VO45 Hydraulic Piston Pumpis aswashplate-type axial piston variable-displacement pumpmanufactured by Bosch Rexroth (or authorized suppliers). It is widely used in construction machinery (e.g., excavators, cranes), industrial equipment (e.g., injection molding machines), and marine systems requiring high-pressure, large-flow hydraulic power. Its core advantages includehigh efficiency, low noise, and variable displacement control, supporting both open and closed hydraulic circuits.
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2. Key Technical Specifications
【表格】
Parameter Specification
Type Swashplate-type axial piston variable-displacement pump
Displacement 45 cm³/rev (variable range: 10%–100%)
Rated Pressure 28 MPa (continuous) / 35 MPa (peak, ≤10 seconds)
Max. Speed 2,200 rpm (at 46 cSt oil viscosity)
Control Modes Manual (HD), Hydraulic (HD), Electro-Hydraulic Proportional (DR, EP)
Weight Approx. 42 kg (including flange and ports)
Oil Requirements Mineral-based hydraulic oil (ISO VG46), cleanliness class NAS 6 or ISO 18/15
Operating Temp. -20°C to +80°C (short-term up to +100°C)
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3. Core Features
(1) Variable Displacement Control
• Pressure Compensation (DR): Automatically adjusts displacement based on system pressure to reduce energy loss (suitable for fluctuating pressure demands).
• Flow Compensation (EP): Precisely controls displacement via electrical signals for synchronized multi-actuator operation (e.g., excavator boom and bucket coordination).
• Manual Adjustment (HD): Fixed displacement control via mechanical lever for stable applications.
(2) High-Efficiency Design
• Chromium-plated piston pairs: Reduces friction and improves volumetric efficiency (≥95%).
• Spherical valve plate: Optimizes oil distribution and minimizes leakage (leakage ≤1% of rated flow).
(3) Enhanced Reliability
• Bearing life: Double-row tapered roller bearings support high radial/axial loads, with a lifespan exceeding 10,000 hours.
• Contamination resistance: Built-in 10μm filter screen tolerates minor oil contamination (requires regular maintenance).
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4. Typical Applications
【表格】
Equipment Type Examples
Construction Machinery Excavators (main pump), cranes (luffing/slewing mechanisms), road rollers (vibration systems)
Industrial Equipment Injection molding machines (clamping/injection), die-casting machines (lock force control), shearing machines (hydraulic cutting)
Marine Systems Deck machinery (winches, capstans), steering gear hydraulic stations
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5. Installation & Commissioning Guide
(1) Pre-Installation Checks
• Alignment: Ensure pump shaft and driver (motor/engine) alignment error ≤0.05mm (radial) and ≤0.1° (angular).
• Oil Cleanliness: Flush hydraulic lines with a 5μm filter before installation to prevent particle damage to the valve plate.
(2) Electrical Connections (Electro-Hydraulic Control)
• Control Signals: DR control requires 4-20mA current; EP control supports PWM or CAN bus signals.
• Grounding: Use a dedicated ground wire to the equipment chassis to avoid electromagnetic interference.
(3) Initial Operation
• No-Load Start: Run for 5 minutes, then gradually load to 50% while checking for leaks and vibrations.
• Pressure Calibration: Verify system pressure matches settings using a pressure sensor (error ≤±1.5MPa).
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6. Maintenance & Troubleshooting
(1) Routine Maintenance
• Oil Inspection: Test viscosity (ISO VG46) and water content (≤0.1%) every 250 hours.
• Filter Replacement: Replace suction filters (10μm) and return filters (25μm) every 500 hours.
(2) Component Lifespan
【表格】
Component Recommended Replacement Interval Failure Signs
Piston Pair 8,000 hours Increased noise, reduced flow
Bearings 10,000 hours Abnormal vibration, overheating (>85°C)
Valve Plate Seal 5,000 hours Internal leakage, pressure fluctuations
(3) Common Faults & Solutions
【表格】
Symptom Possible Causes Actions
Low output flow Stuck variable mechanism, air ingestion Clean variable piston, check suction line seals
System overheating (>90°C) High oil viscosity, clogged cooler Replace low-viscosity oil, clean radiator fins
Pressure fluctuations (>±2MPa) Internal leakage, relief valve failure Replace piston seals, recalibrate relief valve pressure
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