A swash plate plunger pump or motor

Abstract

The present invention provides a swash plate type plunger pump or motor, which includes a housing, a main shaft, a plurality of plunger assemblies, a swash plate, a cylinder body, a flow distribution plate and a connecting part, the connecting part includes a relatively oscillating first part and the second part, the first part is combined with the main shaft and rotates synchronously with the main shaft, the swash plate is combined with the second part and rotates synchronously with the second part; the center of the cylinder is provided with Cylindrical inner hole, the main shaft extends into the cylindrical inner hole, and a fit is formed between the main shaft and the cylindrical inner hole, when the main shaft rotates, the cylinder rotates driven by the plunger assembly . The swash plate type plunger pump of the present invention can form a gap fit between the main shaft and the cylinder body, and its transmission line is the main shaft, connecting parts, swash plate, plunger assembly, and cylinder body, which has good assembly, high overall efficiency, side The advantages of small axial force, coaxial or through-axis connection can be realized.

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

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