Swash plate type axial piston pump or motor

Abstract

The invention provides a swash plate type axial piston pump or a motor, which comprises a shell, a main shaft, a plurality of piston components, a swash plate, a cylinder, a distributive flow disk and a connecting part, wherein the connecting part comprises a first part and a second part which relatively swing, the first part is combined with the main shaft and synchronously rotates with the main shat, the swash plate is combined with the second part and synchronously rotates with the second part, a cylindrical inner hole is arranged on the center of the cylinder, the main shaft stretches into the cylindrical inner hole, the main shaft and the cylindrical inner hole are matched, and when the main shat rotates, the cylinder is driven by the piston components to rotate. The main shaft and the cylinder of the swash plate type axial piston pump can form clearance fit, the transmission line of the swash plate type axial piston pump is the main shaft, the connecting part, the swash plate, the piston components and the cylinder, and the swash plate type axial piston pump has the advantages of excellent assembly, high total efficiency and small lateral force, and can achieve the advantages of coaxial or through-shaft connection and the like.

Description

technical field [0001] The invention relates to the field of hydraulic pressure, in particular to a swash plate type plunger pump or a swash plate type plunger motor. Background technique [0002] Hydraulic pumps and hydraulic motors are very important energy conversion components in hydraulic systems. Hydraulic pumps convert mechanical energy into hydraulic energy, while hydraulic motors convert hydraulic energy into mechanical energy. In theory, the two can be switched to each other, but there are only some differences. For the sake of brevity, this article focuses on the design of the hydraulic pump, and the structure of the hydraulic motor can refer to the description of the hydraulic pump. [0003] Piston pump is one form of hydraulic pump. The plunger pump has been widely used in construction machinery and other fields due to its advantages of high pressure, high speed, high efficiency and easy variable control. According to the arrangement of the plunger and the rel...

AI Technical Summary

Problems solved by technology

[0010] Since the cylinder body and the swash plate are driven to rotate by the main shaft at the same time, after the cylinder body is assembled to the main shaft through the spline, the universal coupling and the swash plate need to be assembled to the main shaft through the spline. It is very difficult for any one of the plunger components to be accurately assembled between the swash plate ball socket and the plunger hole, which puts forward very strict requirements on the processing and manufacturing accuracy, and even cannot be assembled in severe cases.

Moreover, even if the assembly is completed, there may be problems such as low assembly accuracy, poor plunger sealing, oil leakage and friction loss, which will affect the overall efficiency of the swash plate plunger pump

Images