In the world of construction machinery, the hydraulic plunger pump is a vital component, which is like the "heart" of the equipment and provides power for various actions. In order to ensure the efficient operation of the equipment, it is important to understand the use and maintenance methods of the hydraulic piston pump.

First, let's focus on the form of fuel delivery. The direct axis swash plate piston pump is divided into two types: pressure oil supply type and self-priming oil type. For pressure oil supply hydraulic pumps, the air tank is a common configuration, and some hydraulic pumps are also equipped with oil distribution pumps to provide pressure oil for the oil inlet. Self-priming hydraulic pump with its strong self-priming oil capacity, no external oil supply.

In the process of use, for the hydraulic tank that relies on air pressure to supply oil, after each start of the machine, it is necessary to wait for the hydraulic tank to reach the use of air pressure before operating the machinery. If the air pressure is insufficient to operate, it may cause the slide whip in the hydraulic pump to pull out, and even cause abnormal wear of the return plate and the pressure plate in the pump. For the plunger pump with oil supply pump, the operator needs to check it 1-2 times a day to ensure that the hydraulic pump runs normally. If it is found that the speed of the hydraulic cylinder drops or the car is dull, the oil pump should be disassembled in time to check whether the impeller edge is scratched and whether the clearance of the internal gear pump is too large.

For the self-priming oil type plunger pump, the oil in the hydraulic tank shall not be lower than the lower limit of the oil standard, and sufficient hydraulic oil shall be maintained. At the same time, the cleanliness of the hydraulic oil also directly affects the service life of the hydraulic pump.

Next, let's focus on the key components of the hydraulic pump - bearings. The average service life of the bearing is 10000h, once it exceeds this value, it needs to be replaced with a new bearing. When dismounting the bearing, if there is no professional testing instrument, visual inspection can be used, if there is a scratch or discoloration on the surface of the roller, it must be replaced in time. When replacing bearings, you should pay attention to the English letters and models of the original bearings, and try to buy the products of the original manufacturer and original specifications. If you replace other brands, you should consult experienced personnel to check the table to ensure the accuracy level and load capacity of the bearing.

Finally, we discuss the inspection and repair of three pairs of friction pairs. The repair of plunger rod and cylinder hole, slipper shoe and swash plate, and valve plate and cylinder plate plate requires professional technology and methods. During the repair process, it should be operated in strict accordance with the standards to ensure that the repaired parts can restore the original performance and accuracy.

In short, the use and maintenance of construction machinery hydraulic piston pump is the key to ensure the normal operation of equipment. Through the correct use and maintenance, the service life of the hydraulic piston pump can be extended, and the reliability and efficiency of the equipment can be improved. At the same time, in the maintenance process, professional maintenance personnel and high-quality accessories should be selected to ensure the quality of maintenance and the safety of the equipment.