Introduction to the structure of various axial piston pumps

Axial piston pump
Axial piston pump is a piston pump with the reciprocating motion direction of the piston or plunger parallel to the central axis of the cylinder block. The axial piston pump uses the volume change caused by the reciprocating movement of the plunger parallel to the transmission shaft in the plunger hole. It has the advantages of high volumetric efficiency, stable operation, good flow uniformity, high working pressure and low noise, but it is more sensitive to the pollution of hydraulic oil, the structure is more complex, and the cost is higher.
Hydraulic piston pump
The hydraulic piston pump relies on the hydraulic oil tank supplied by air pressure, and after each start of the machine, it is necessary to wait for the hydraulic tank to reach the air pressure before operating the machine. Straight shaft swash plate piston pump is divided into two types: pressure oil supply type and self-priming oil type. Most of the pressure oil supply hydraulic pumps use an oil tank with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming hydraulic pump has a very strong self-priming capacity and does not require external oil supply.
Straight shaft swash plate piston pump
Straight shaft swash plate piston pump is divided into two types: pressure oil supply type and self-priming oil type. Most of the pressure oil supply hydraulic pumps use an oil tank with air pressure, and there are also hydraulic pumps with oil replenishment sub-pumps to provide pressure oil to the oil inlet of the hydraulic pump. The self-priming hydraulic pump has a strong self-priming capacity and does not require external oil supply. The hydraulic oil tank that relies on air pressure to supply oil must wait for the hydraulic tank to reach the operating air pressure after each start of the machine.
Radial piston pumps
Radial piston pumps can be divided into two categories: valve distribution and shaft distribution. The valve distribution radial piston pump has the disadvantages of high failure rate and low efficiency. Due to the structural characteristics of radial pumps, axial distribution radial piston pumps are more impact-resistant, have a longer service life and higher control accuracy than axial piston pumps.