Plunger pump as well as plunger motor and nosing-free reverse-package plunger piston shoe assembly thereof

Abstract

The invention provides a plunger pump as well as a plunger motor and a nosing-free reverse-package plunger piston shoe assembly thereof, wherein the nosing-free reverse-package plunger piston shoe assembly is simple in structure and convenient to dismount. The nosing-free reverse-package plunger piston shoe assembly comprises a piston shoe with a ball head and a plunger piston with a ball socket, wherein the ball socket is greater than a semi-ball; a sphere diameter of the ball head is greater than the opening caliber of the ball socket, and the ball head has a shrinking section with the radial length smaller than the opening caliber of the ball socket, so that the ball head is conveniently inserted into the ball socket; after being inserted into the ball socket, the ball head can rotate by a predetermined angle relative to the ball socket so as to be blocked at the opening of the ball socket. By virtue of the shrinking section of the ball head and the over-semi-ball setting of the ball socket, a complex nosing-free process is cancelled, and production cost is lowered; installation for the ball head and the ball socket can be realized by only needing to align the shrinking section of the ball head to the opening of the ball socket for inserting, and then rotating by the predetermined angle; the nosing-free reverse-package plunger piston shoe assembly is simple in structure, simpler to assemble, more convenient to use and maintain, can control pollution of components conveniently, so that the service life of the nosing-free reverse-package plunger piston shoe assembly is prolonged.

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 without turning-up of the 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 connected by a ball-and-...

AI Technical Summary

Problems solved by technology

[0013] Although this technical solution omits the complex ball wrapping process, 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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