A4VG90HD1DT1/32R Hydraulic piston pump
4 week ago
Product details
A4VG90HD1DT1/32R Hydraulic Axial Piston Pump: Core Information & Analysis
I. Product Positioning & Core Functions
The A4VG90HD1DT1/32R is a swashplate-type axial piston variable displacement pump manufactured by Bosch Rexroth, designed specifically for closed-loop hydrostatic transmission systems. Its core functions include:
1. Stepless Flow Adjustment: Flow is proportional to drive speed and displacement, enabling continuous variable output from zero to maximum via swashplate angle modulation to meet diverse operational demands.
2. Bidirectional Hydraulic Transmission: Smooth reversal of fluid flow when the swashplate swings past neutral, ideal for equipment requiring forward/reverse motion (e.g., concrete pump trucks, rotary drilling rigs).
3. Pressure Protection & Make-Up Function: Two relief valves on the high-pressure side prevent system overload; the high-pressure relief valve doubles as a make-up valve, while an integrated auxiliary pump provides control and make-up pressure for stability.
II. Technical Parameters & Performance Features
【表格】
Parameter Category Detailed Specifications
Displacement 90 cm³/rev, a high-capacity model in the A4VG series suitable for medium-to-large hydraulic systems.
Pressure Ratings Rated pressure: 40 MPa; peak pressure: 45 MPa, meeting high-load requirements.
Control Modes Supports multiple configurations (e.g., hydraulic control, electro-proportional control), customizable via codes (e.g., HD, EP).
Structural Materials Cast iron housing for durability in harsh conditions; precision-machined key components (e.g., pistons, swashplate) ensure volumetric efficiency.
Mounting Interface Flange-mounted for easy connection to drive shafts; standard test ports for real-time monitoring of pressure, flow, and temperature.
Environmental Protection Compliant with international standards; operational range: -40°C to +60°C (optional cold-start kits or high-temperature modules available).
III. Typical Applications
1. Construction Machinery
• Concrete Pump Trucks: Powers boom and pumping systems for efficient concrete delivery.
• Rotary Drilling Rigs: Provides main hoist and rotation drive for precise drilling operations.
• Road Rollers: Drives vibration wheels for high-frequency compaction.
2. Industrial Vehicles
• Heavy-Duty Platform Trucks: Supplies hydraulic power for steering and propulsion in large-load transport.
3. Marine Equipment
• Deck Machinery: Actuates anchor winches and capstans for shipboard operations.
4. Energy Sector
• Wind Turbines: Used in yaw and pitch systems for wind direction tracking.
IV. Selection & Usage Considerations
1. Model Selection
• Choose displacement based on system pressure/flow demands (e.g., A4VG90 for medium-large systems; A4VG56 for lighter loads).
• Verify control mode compatibility (e.g., EP for automated systems, HD for traditional machinery).
2. Installation & Commissioning
• Ensure pump shaft alignment with drive shaft ≤0.1mm to prevent vibration-induced bearing damage.
• Prime the system via the make-up pump before initial startup to avoid cavitation.
3. Maintenance & Upkeep
• Replace hydraulic oil every 1,000–3,000 operating hours or 6 months; clean filters regularly.
• Monitor relief valve settings to prevent prolonged overload operation.
V. Market Reputation & Advantages
• High Reliability: Cast iron construction and precision components extend service life, with lower failure rates than competitors.
• Energy Efficiency: Variable displacement reduces energy waste, lowering operational costs.
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