First, the main pump introduction

In the excavator, the main pump is the energy converter for each actuator of the excavation device, which is responsible for converting the hydraulic oil into power to drive the hydraulic motor and cylinder to work. The main pump usually adopts hydraulic variable pump or piston pump.

Hydraulic variable pump refers to change the eccentric distance of the plunger or adjust the angle of the swash plate, in order to change the size of the displacement of the hydraulic pump. This kind of pump has the advantages of large flow, high pressure, wide speed range, high efficiency and low energy consumption, and is usually used in excavators and other large mechanical equipment.

Piston pump refers to the reciprocating piston structure to achieve a variable flow of a hydraulic component. This pump has the advantages of high pressure, stable displacement, sensitive response, etc., and is widely used in engineering machinery, metallurgical equipment, mold machinery and other fields.

Second, the working principle of the main pump

The working principle of the main pump is dependent on the mechanical properties of the hydraulic fluid, driven by the motor through the drive mechanism to drive the variable pump or piston pump rotation, so that the hydraulic oil is pressed into the hydraulic system. According to the type of hydraulic pump, pressure and flow size will be different, but all have the function of providing power.

Third, the main pump maintenance and troubleshooting

In daily use, the excavator main pump needs regular maintenance and maintenance to ensure that it can operate normally. Should regularly replace the hydraulic oil, clean up the filter, refill lubricating grease and so on. If the hydraulic system is found to be abnormal, the hydraulic oil temperature is too high, the displacement is reduced and other faults, it should be timely troubleshooting.

The specific steps of troubleshooting include testing the parameters of the hydraulic pump, using professional equipment for testing, and repairing the hydraulic system of the excavator. It should be noted that in the process of troubleshooting, special attention should be paid to safety issues to ensure that it will not bring losses to the lives and properties of the staff.

Four, conclusion

In the excavator, the main pump is a very important hydraulic component, which directly affects the efficiency and performance of the excavator. Only by keeping good maintenance and repair of the main pump can we ensure the normal operation of the excavator and bring a better experience for the user.