PV23 Charge Pump & EATON 5423 Charge Pump
I. Product Positioning & Core Functions
1. PV23 Charge Pump
• Applications:
Designed forclosed-loop hydraulic systems(e.g., construction machinery, variable displacement pumps/motors in industrial equipment), providingcharge oil supply, cooling, and backpressure maintenance.
• Technical Features:
• Structure: Typically agear pumporpiston pumpwith integrated check valves and relief valves, supporting high rotational speeds (up to3,000 RPM).
• Flow Rate: Displacement range of5–20 cc/rev, suitable for small-to-medium closed-loop systems (e.g., mini excavators, crawler crane travel drives).
• Pressure Capacity: Charge pressure typically10–30 bar, meeting leakage compensation and cooling demands.
2. EATON 5423 Charge Pump
• Applications:
Engineered forheavy-duty closed-loop hydraulic systems(e.g., mining equipment, tracked vehicles) under EATON’s portfolio, offeringhigh power density and contamination resistance.
• Technical Features:
• Structure: Aluminum housing with high-strength gear sets, supporting continuous operation (MTBF >10,000 hours). Optionalsolenoid-controlled relief valvesfor remote pressure adjustment.
• Flow Rate: Displacement range of15–50 cc/rev, compatible with large closed-loop systems (e.g., large wheel loaders, rotary drilling rigs).
• Pressure Capacity: Charge pressure up to20–40 bar, enabling high backpressure operation (e.g., steering brakes in tracked vehicles).
II. Technical Parameter Comparison Table
【表格】
Parameter PV23 Charge Pump EATON 5423 Charge Pump
Displacement Range 5–20 cc/rev 15–50 cc/rev
Max. Rotational Speed 3,000 RPM 2,500 RPM (optimized for heavy loads)
Charge Pressure 10–30 bar 20–40 bar
Port Types SAE/DIN flange or threaded ports EATON-specific quick couplings (compatible with 5423 valve blocks)
Contamination Resistance ISO 18/16 (NAS Class 6) ISO 19/17 (NAS Class 5, reinforced filtration)
Typical Applications Mini excavators, aerial work platforms Large mining trucks, rotary drilling rigs, crawler cranes
III. Selection & Usage Recommendations
1. Selection Criteria:
• Displacement Matching: Charge pump displacement should be5%–10%of the main pump’s displacement (e.g., 10 cc/rev for a 100 cc/rev main pump).
• Pressure Margin: Charge pressure should exceed system leakage pressure by≥30%to ensure stable backpressure.
• Environmental Adaptability:
• PV23: Suitable for-20°C to +80°C(optional high-temperature bearings).
• EATON 5423: Operates in-40°C to +100°Cextreme conditions (e.g., desert/polar operations).
2. Installation & Maintenance Key Points:
• Suction Conditions: Ensure suction port pressure ≥0.3 barto avoid cavitation (install suction filters with ≤25 μm accuracy).
• Pressure Calibration: Adjust charge pressure via relief valves (manual for PV23; solenoid-controlled for 5423).
• Troubleshooting:
• Insufficient Pressure: Check for stuck relief valves, clogged suction filters, or internal pump leakage.
• Abnormal Noise: Address gear wear or excessive axial clearance (replace pump body or adjust clearance).
IV. Typical Application Cases
1. PV23 Charge Pump Case:
• Equipment: 15-ton hydraulic excavator (closed-loop travel drive).
• Operating Conditions: Charge pump displacement 12 cc/rev, charge pressure 25 bar. No leakage or pressure decay after10,000 hoursof continuous operation.
• User Feedback: System temperature rise reduced by 15%, fuel consumption decreased by 8% after integrating with the OEM’s variable displacement pump.
2. EATON 5423 Charge Pump Case:
• Equipment: 400-ton rotary drilling rig (closed-loop slewing system).
• Operating Conditions: Charge pump displacement 35 cc/rev, charge pressure 35 bar. Supports ±180° continuous slewing.
• User Feedback: Successful cold start at-30°C, charge pressure fluctuation <±2 bar, significantly improving system reliability.
