Plunger sliding shoe and assembly process thereof

Abstract

The invention discloses a plunger piston shoe, and belongs to the technical field of plunger pumps. The sliding shoe comprises a sliding shoe body and a plunger, the sliding shoe body comprises a sliding shoe base and a ball head rod detachably connected to the sliding shoe base, and a ball head is fixed to the end, away from the sliding shoe base, of the ball head rod; the connecting assembly comprises an outer connecting sleeve and an inner connecting shaft in threaded connection with the inner side of the outer connecting sleeve, ball sockets are formed in the outer connecting sleeve and the inner connecting shaft, a ball head mounting hole is formed in the side, away from the inner connecting shaft, of the outer connecting sleeve, and the diameter of the end, away from the plunger, of the inner connecting shaft passes through the centers of the ball sockets; the end, away from the outer connecting sleeve, of the inner connecting shaft is detachably connected with the plunger. Compared with a traditional closing-in mode, the closing-in step is omitted, plastic deformation of the outer connecting sleeve is reduced, the gap between the inner wall of the ball socket and the ball head is easier to control, and the precision of the gap between the inner wall of the ball socket and the ball head is improved.

Description

technical field [0001] The present application relates to the technical field of plunger pumps, and in particular, to a plunger sliding shoe and an assembling process thereof. Background technique [0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder body to change the volume of the sealed working chamber to achieve oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. [0003] The plunger sliding shoe assembly is composed of a plunger and a sliding shoe. The main body of the plunger is a cylindrical structure, and the front end has a ball head or a ball socket; the main body of the sliding shoe is a stepped cylindrical shape, which can rub on the swash plate and interact with the plunger. The hydraulic pressure on the plunger is transferred to the swashplate through a ball-and-soc...

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that there are the following defects: the plunger and the sliding shoe made by the sealing process need to use special closing equipment to close the sliding shoe, and the structure of the sliding shoe is plastically deformed when it is closed. During this period, a lot of heat will be generated, and due to thermal expansion and contraction, the gap between the subsequent sliding shoe and the plunger is difficult to grasp

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