A plunger pump, a plunger motor, and a plunger sliding shoe assembly with a positive-wrapped plunger without a socket

Abstract

The invention provides a plunger pump and a plunger motor and a closing-in-prevention forward-packet plunger sliding boot assembly thereof. The closing-in-prevention forward-packet plunger sliding boot assembly comprises a plunger and a sliding boot; the plunger comprises a ball head; the sliding boot comprises a ball socket; the ball socket is larger than a half ball; the ball diameter of the ball head is larger than the opening size of an opening of the ball socket; the ball head comprises a retraction section, wherein the radial length of the retraction section is smaller than the opening size of the opening of the ball socket so as to enable the ball head to be inserted into the ball socket; the ball head can rotate in a preset angle relative to the ball socket after being inserted into the ball socket so as to be blocked at the position of the opening of the ball socket. According to the plunger pump and the plunger motor and the closing-in-prevention forward-packet plunger sliding boot assembly thereof, the complex closing-in process is omitted through the retraction section of the ball head and the over-half-ball ball socket and accordingly the production cost is reduced; a user only needs to enable the retraction section of the ball head to be aligned to the opening of the ball socket to be inserted in and then rotates the preset angle to achieve the installation of the ball head and the ball socket; the simple is simple, the assembly is simple, the detachment and the installation are convenient, the use is convenient, the maintenance is convenient, the part pollution is convenient to control, and accordingly the service life is extended.

Description

technical field [0001] The invention relates to the technical field of hydraulic pressure, in particular to a plunger pump, a plunger motor and a plunger sliding shoe assembly with a positive-wrapped plunger without a socket. Background technique [0002] The plunger pump is a hydraulic pump that reciprocates and linearly moves in the cylinder hole to output high-pressure oil; the plunger motor is a hydraulic motor that reciprocates and linearly moves in the cylinder hole to output torque . The plunger shoe assembly is the core component of hydraulic pumps and hydraulic motors, which directly affects the performance of plunger pumps and plunger motors. [0003] The plunger shoe assembly is composed of a plunger and a shoe. The main body of the plunger is a cylindrical structure with a ball head or a ball socket at the front end; the main body of the shoe is a stepped cylinder, which can rub on the swash plate, and is in contact with the swash plate. The plunger is connecte...

AI Technical Summary

Problems solved by technology

[0011] In the above two existing technologies, although the complex ball wrapping process is omitted, the entire plunger shoe assembly has many parts, its structure is more complicated, the assembly process is more cumbersome, and the cost is higher

In addition, the ball joint connection between the plunger and the sliding shoe is not disassembled, which brings inconvenience to maintenance and is not easy to carry out pollution control

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