Supporting structure of plunger pump

Abstract

The invention relates to a supporting structure of a plunger pump, which comprises a swash plate seat and a swash plate, the swash plate seat is provided with a cambered heavy load area slide rail and a cambered light load area slide rail, and the swash plate is provided with a cambered heavy load area bearing bush matched with the heavy load area slide rail and a cambered light load area bearing bush matched with the light load area slide rail. Oil inlet holes are formed in the sliding rails respectively, an oil pool is formed in the sliding rails or the bearing bush, an oil film supporting area is formed on the periphery of the oil pool, a non-static-pressure supporting area is formed on the periphery of the oil film supporting area, high-pressure oil enters the oil pool through the oil inlet holes, an oil film with the uniform thickness is formed in the oil film supporting area, and then the oil film is discharged through a flow guide groove between the oil film supporting area and the non-static-pressure supporting area. The oil pool and the oil film supporting area of the heavy load area and the oil pool and the oil film supporting area of the light load area are of an asymmetric structure, so that the defects in the prior art are overcome, the efficiency of the plunger pump is effectively improved, and the service life of the plunger pump is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of a hydraulic swash plate plunger pump, in particular to a support structure of a plunger pump. Background technique [0002] In the fields of machine tools, metallurgy, mining, construction machinery, etc., the swash plate axial piston pump (hereinafter referred to as the plunger pump) is widely used in the hydraulic transmission system of various machinery. The plunger pump has a wide range of working pressure and high , high efficiency, compact structure, small size, light weight, high power density, etc., especially suitable for high-power hydraulic transmission systems. Piston pumps are further divided into quantitative plunger pumps and variable displacement plunger pumps. The displacement of variable plunger pumps can be adjusted, the output flow range is large, and the application is more extensive. [0003] A rotating pair is formed between the swash plate and the swash plate seat, and the displac...

AI Technical Summary

Problems solved by technology

[0006] 1. There is a copper bearing pad or a friction layer between the swash plate and the rotating pair of the swash plate seat, and parts such as fixing pins and throttle plugs are required to cooperate with the copper bearing pad. There are many parts, and the processing technology of the friction layer is complicated and the processing cost is high;

[0007] 2. Set symmetrical oil storage tanks on the bearing bushes on both sides of the swash plate or on the slide rails on both sides of the swash plate seat. Because the force on the light-load side of the swash plate is small, the static pressure support force is much greater than the effect of the sliding shoes on the light-load side of the swash plate The swash plate has a tendency to break away from the swash plate seat, and the static pressure support force on the light load side is unreasonably matched, resulting in a large leakage of the rotating pair on the light load side;

[0008] 3. After the plunger pump changes, that is, after the inclination angle of the swash plate changes, the area of ​​the oil film support area formed by the pairing area of ​​the swash plate bearing bush and the slide rail of the swash plate seat changes, the oil film support area is asymmetrically distributed, and the direction of the static pressure support force It also changes accordingly, the swash plate bears the overturning moment, and the thickness of the oil film is uneven, resulting in a large leakage of the rotating pair after the plunger pump is variable;

[0009] 4. It is difficult to form an equal thickness and uniform oil film in the static pressure support area;

[0010] 5. The radius of the swash plate bearing pad is the same from the inside to the outside, and the bearing pads on both sides of the swash plate bear different forces. The swash plate tends to tilt toward the heavy-load side, resulting in serious wear on the outer edge of the bearing pad on the heavy-load side of the swash plate.

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