Excavator main pump

The main pump of the excavator is a key component of the hydraulic system of the excavator, which is mainly responsible for converting mechanical energy into hydraulic energy and providing power for various actions of the excavator. Here are some details about the excavator main pump:

First, Types and Structures

1. Gear pump: simple structure, low cost, strong anti-pollution ability, but large flow pulsation, low pressure, often used in small excavators or occasions with low performance requirements.

2. Vane pump: uniform flow, stable operation, low noise, but sensitive to oil pollution, general working pressure, suitable for medium and low pressure excavator hydraulic system.

3. Piston pump: high pressure, large flow, high efficiency, convenient variables, can meet the needs of various complex working conditions of excavators, and is widely used in modern excavators.

  Second, Functions & Features

1. High pressure and large flow: The main pump of the excavator needs to withstand high working pressure and can provide enough flow to meet the needs of various actions of the excavator.

2. Wear-resistant and durable: Due to the harsh working environment of the excavator, the main pump needs to have good wear resistance and durability to ensure long-term stable operation.

3. Variable control: Some excavator main pumps have variable control function, which can adjust the output flow and pressure according to the work requirements to improve work efficiency and energy saving effect.

Third, Common Troubleshooting and Troubleshooting

1. Leakage: Leakage from the main pump can lead to problems such as system pressure drops, sluggish movements, etc. Seals, O-rings and other wearing parts should be checked for wear or damage, and replaced in time.

2. Abnormal noise: The abnormal sound of the main pump may be caused by bearing damage, poor gear meshing and other reasons. Damaged parts should be stopped for inspection and replacement.

3. Overheating: High oil temperature may lead to problems such as deterioration of the performance of the main pump and aging of seals. The cooling system should be checked to see if it is working properly and to ensure that the hydraulic oil cleanliness meets the requirements.

Fourth, Maintenance & Maintenance

1. Regular inspection: Regularly inspect and maintain the main pump, including checking the oil level, oil quality, seals, etc.

2. Change the hydraulic oil: Change the hydraulic oil regularly to ensure the cleanliness and stable performance of the system.

3. Clean the radiator: Clean the radiator regularly to prevent clogging and causing the oil temperature to be too high.

4. Keep it clean: Keep the main pump and the surrounding environment clean to prevent damage caused by debris entering.

Fifth, role

1. Energy conversion: Convert the mechanical energy output of the engine into the hydraulic energy of the hydraulic oil, and provide power for the boom, small arm, bucket, walking mechanism, slewing mechanism, etc. of the excavator, so as to realize the actions of digging, lifting, slewing, and walking.

2. Flow and pressure control: According to the work needs of the excavator, the flow and pressure of the hydraulic oil are accurately adjusted, so that the working parts can work at the appropriate speed and force.

Main hydraulic pump diagram

Excavator hydraulic pump types