I. Core Functions of HPU in Large Supporting Trucks
The Hydraulic Power Unit (HPU) serves as the central power source for large supporting trucks, constructing a closed oil supply system by integrating components such as oil tanks, oil pumps, accumulators, and control elements. Its core functions include:
1. Precise Control of Hydraulic Cylinder Operations: Through external piping connections to multiple hydraulic cylinders, it enables precise control over actions such as valve opening/closing and support structure elevation/lowering.
2. Driving Heavy-Duty Machinery: During truck operation, the HPU provides stable power to support legs, lifting platforms, and other heavy-duty machinery, ensuring stability under complex working conditions.
3. Modular Design and Intelligent Interaction: Adopting a modular design, it can integrate Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), regulating oil pressure and accumulator energy via solenoid valves to achieve rapid opening/closing or precise adjustments.
II. Power Unit Configuration and Performance Parameters
To meet the specific requirements of large supporting trucks, the HPU's power unit configuration must adhere to the following technical specifications:
1. Motor and Pump Displacement Adaptation:
• Motor Power: Compatible with motors ranging from 0.3 kW to 4.5 kW, ensuring power output matches truck load requirements.
• Pump Displacement: Supports a displacement range of 0.24 cc to 5.7 cc, meeting flow demands under various operating conditions.
2. Parallel Control Capability for Hydraulic Cylinders:
• Multi-Cylinder Synchronization: Enables simultaneous control of up to four hydraulic cylinders, facilitating synchronized elevation/lowering of support structures and enhancing truck stability.
• Independent Adjustment: Each hydraulic cylinder can be independently regulated for pressure and flow, accommodating differential support needs on uneven terrain.
3. Optimization of Key Components:
• Bidirectional Gear Pump: Enhances oil flow rate and velocity, improving power smoothness.
• Cartridge Valve Assembly: Achieves rapid response and precise control, minimizing energy loss.
• Self-Adjusting Oil Suction Device: Automatically adapts to variations in oil viscosity, ensuring stable system operation.
III. Typical Application Scenarios and Advantages
1. Adaptability to Harsh Environments:
• High/Low-Temperature Operations: The HPU utilizes heat-resistant and cold-resistant materials to ensure normal operation under extreme temperatures.
• Heavy-Load Handling: By optimizing power transmission efficiency, it supports prolonged, high-frequency heavy-object handling tasks by the truck.
2. Technical Advantages:
• Low-Noise Design: Incorporates silent oil pumps and vibration-damping structures to reduce noise pollution during truck operation.
• High Power Density: Compact design saves space while delivering robust power output.
• Strong Environmental Adaptability: Features dustproof and waterproof designs, suitable for outdoor harsh conditions.
IV. Selection and Configuration Recommendations
1. Motor Size Selection:
• Choose motor sizes ranging from 80 mm to 132 mm based on truck load and operating frequency, balancing power and energy consumption.
2. Pump Displacement Matching:
• Light-Load Conditions: Select displacements from 0.24 cc to 2.0 cc to reduce energy consumption.
• Heavy-Load Conditions: Opt for displacements from 3.0 cc to 5.7 cc to ensure sufficient power.
3. Control Method Optimization:
• PLC Integrated Control: Enables automated operation and remote monitoring, improving operational efficiency.
• Manual Emergency Control: Equipped with manual valves to ensure hydraulic system operability during power failures.
