I. Characteristics of SY500/SY550/SY485 Equipment and Hydraulic System Requirements
Taking the Shandong Chaoweite SY550 generator set as an example, its core parameters include:
• Rated power: 400kW (prime power) / 440kW (standby power);
• Engine model: YC6T660L-D31 (inline 6-cylinder, displacement 16.35L);
• Operating conditions: ambient temperature ≤40°C, altitude ≤1,000m, humidity ≤60%.
Such equipment typically relies on ahydraulic systemto achieve critical functions, such as:
• Engine speed regulation: Precise control of fuel injection volume via ahydraulic piston pumpensures stable engine operation under variable load conditions;
• Cooling system: A hydraulically driven fan pump (e.g., Hengli HP5V28) adjusts fan speed based on temperature signals to optimize cooling efficiency;
• Braking system: A hydraulic brake pump provides high-pressure oil to enable rapid braking responses.
II. Technical Compatibility of Hengli Fan Hydraulic Pump HP5V28
TheHP5V28 hydraulic pump, a fan-specific pump from Hengli, features the following core parameters and design characteristics:
1. Displacement and Pressure:
• Displacement: 28mL/r; rated pressure: 25MPa; peak pressure: 31.5MPa. It meets the high-load hydraulic system requirements of SY500/SY550/SY485 equipment.
• For example, in the cooling system of the SY550 generator set, the HP5V28 provides stable oil pressure to drive the fan motor for stepless speed regulation.
2. Variable Control Modes:
• Supports multiple control methods, including constant power, constant pressure, and load-sensing control, to adapt to different operating conditions:
• Constant power control: Automatically adjusts displacement to maintain constant power during variable load operation of the SY550 generator set, preventing engine overload;
• Load-sensing control: Dynamically regulates oil flow based on braking demands in the hydraulic braking system, improving response speed and energy efficiency.
3. Efficiency and Reliability:
• Features a swashplate axial piston design with volumetric efficiency ≥95% and total efficiency ≥90%, reducing system energy consumption;
• Key components (e.g., pistons, valve plates) are made of high-strength alloy materials, enabling long-term operation in harsh environments (e.g., high humidity, dust) for SY485 and other equipment.
III. Typical Application Scenarios of HP5V28 in SY Series Equipment
1. Cooling System Optimization:
• During high-temperature operation of the SY550 generator set, the HP5V28 drives the fan pump hydraulically, dynamically adjusting fan speed based on coolant temperature to reduce energy consumption while preventing engine overheating.
2. Hydraulic Braking System Integration:
• In SY485 construction machinery, the HP5V28 serves as the brake pump, driving brake calipers via high-pressure oil to enable rapid and reliable braking, enhancing operational safety.
3. Engine Speed Regulation Assistance:
• Combined with the electronic speed regulation system of the SY500 generator set, the HP5V28 provides auxiliary hydraulic power to maintain stable engine speed during sudden load changes (e.g., grid synchronization).
IV. Technical Comparison and Recommendation Conclusion
【表格】
Parameter HP5V28 Hydraulic Pump Industry Counterparts Advantage Analysis
Displacement 28mL/r 20–35mL/r (common range) Suits hydraulic system needs of medium- to large-scale equipment
Control modes Multiple variable control options Typically constant pressure only Flexibly adapts to diverse conditions, improving system efficiency
Efficiency Total efficiency ≥90% 85%–88% Reduces energy consumption and operating costs
Environmental adaptability Dust- and corrosion-resistant design Standard industrial design Suitable for long-term use in harsh environments for SY series equipment
Recommendation Conclusion:
The Hengli HP5V28 hydraulic pump, with its high displacement, multiple variable control modes, and high efficiency/reliability, fully meets the hydraulic system requirements of SY500/SY550/SY485 equipment. Particularly in cooling system optimization and braking system integration, the HP5V28 significantly enhances equipment operational stability and energy efficiency, making it an ideal hydraulic power solution for such medium- to large-scale equipment.
