Excavator Pump

First, Core Definition and Function

The excavator pump is the "heart" of hydraulic excavators and is a key power component of the hydraulic system. Its core functions include:

1. Energy Conversion: It transforms the mechanical energy from the engine into hydraulic energy, providing power to the boom, arm, bucket, swing mechanism, and traveling device.

2. System Control: Through the adjustment of hydraulic oil pressure and flow, it enables stepless speed regulation, precise control, and overload protection for the excavator's operations.

3. Pressure Maintenance: It ensures the hydraulic system operates stably at a high pressure of 30MPa, adapting to complex working conditions.

Second, Selection and Maintenance Guidelines

1. Selection Points:Tonnage Matching: For 20-ton class excavators, a piston pump is recommended with a flow rate of ≥200L/min; for mini machines, a gear pump can be selected.Working Condition Adaptation: In frequently heavy-load conditions, variable pumps are preferred, while in light-load conditions a fixed-displacement pump may be suitable.Brand Compatibility: Pumps from brands like JCB, Hitachi, Komatsu, etc. must match the original factory hydraulic system parameters.

2. Maintenance Cycle:Daily Inspection: Cleanliness of hydraulic oil (NAS 1638 standard ≤ level 9), oil level, and seal leakage.

500-hour maintenance: Replace the filter element, check the internal leakage of the pump (≤5mL/min).

2000-hour major repair: Disassemble to inspect wear on the piston pair and distribution plate, replace bearings and seals.

3.Troubleshooting:

Insufficient flow: Check for leaks inside the pump (possible plunger wear) and clogged filters.

Pressure fluctuations: Investigate the jamming of variable mechanisms inside the pump and abnormal oil viscosity.

Abnormal noise: Check for bearing damage and cavitation (oil gas content should be ≤0.5%).

Third, Industry Trends and Cases

1.Technical Trends:Electrification: Manufacturers like JCB have introduced electric hydraulic pumps, reducing noise to 65dB, suitable for night construction in urban areas.Intelligence: Integration of IoT modules to transmit pump operating data to the cloud in real-time for predictive maintenance.

2. Typical Cases:Victory Oilfield Project: 500 JCB methanol pumps running continuously for 3 years, with a failure rate of less than 0.3%, maintaining a stable delivery pressure of 1.45MPa.Xiong'an New Area Construction: Excavator fleets using variable pump technology achieved an 18% reduction in overall fuel consumption and a 25% increase in construction efficiency.

Excavator pumps are the core of hydraulic systems, and their performance directly determines the efficiency and reliability of the equipment. Brands like JCB continuously promote industry progress through high pressure and intelligent technology iterations. Users should choose models in accordance with working conditions and establish a scientific maintenance system to ensure long-term stable operation of the equipment. If you need excavator pump, feel free to contact us at any time.

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