CN211038947U - Connecting structure of sliding shoe and plunger in CY plunger pump - Google Patents

Abstract

The connecting structure of the piston shoes and the plungers in the CY plunger pump comprises a piston shoe plunger assembly, a piston shoe plunger assembly and a plunger, wherein the piston shoe plunger assembly comprises a ball head, the upper end of the plunger is provided with a spherical hole, and the spherical hole of the plunger comprises the ball head of the piston shoe through plastic deformation; the piston shoe plunger assembly is tightly attached to the variable head through a steel ball and a return disc under the action of a central spring. Because the plunger is wrapped the piston shoes backward, the CY plunger pump of this kind of plunger is wrapped backward can reduce the fault rate of pump to prolong CY plunger pump long service life greatly.

Description

Connecting structure of sliding shoe and plunger in CY plunger pump

Technical Field

The utility model relates to a connection structure of piston shoes and plunger among CY plunger pump, especially plunger pump.

Background

In the existing CY plunger pump in the market, a plunger is connected with a sliding shoe through a spherical hole of the sliding shoe to enclose a plunger ball head. The sliding shoe is made of high manganese brass, and the plunger is made of alloy steel. The spherical hole of the high-manganese brass slipper covers the ball head of the alloy steel plunger through plastic deformation, and the two parts are connected together. In the process of high-speed operation of the CY plunger pump, the plunger and the sliding shoe are mutually pulled and pressed. Therefore, in order to ensure a reliable connection between the two, the slipper needs to have both sufficient strength and sufficient tensile strength. Because the high manganese brass has poor plastic deformation capability, limited inclusion force and easy generation of cracks, the CY plunger pump can cause the plunger and the sliding shoe to be pulled apart when running at high speed, thereby causing the damage of the whole plunger pump.

SUMMERY OF THE UTILITY MODEL

The utility model aims at avoiding being connected between plunger and the piston shoe to break down, improving the connected mode of piston shoe and plunger, reducing the fault rate of CY plunger pump.

The technical scheme of the utility model is realized like this: the CY plunger pump comprises a shell and an end cover, wherein a transmission shaft is arranged in the shell, a central spring and a steel ball are arranged at the end part of the transmission shaft, the central spring is positioned between a spring inner sleeve and a spring outer sleeve, and a return disc and a sliding shoe plunger assembly are arranged beside the steel ball. The connecting structure of the sliding shoe and the plunger is characterized in that the sliding shoe is provided with a ball head, the end part of the plunger is provided with a spherical hole, and the spherical hole of the plunger comprises the ball head of the sliding shoe through plastic deformation.

The plunger piston assembly is tightly attached to the variable head through a steel ball and a return disc under the action of a central spring; under the drive of the transmission shaft, the return disc forces the plunger to do plane motion on the variable head, and drives the plunger to do telescopic reciprocating motion in a cylinder hole of the cylinder body.

The utility model discloses a structure, because the plastic deformation ability of steel is strong, and it is also strong to contain the ability, is difficult for defects such as crackle, therefore resistance to compression tensile ability is also stronger. Therefore, the faults of the CY plunger pump caused by the faults of the connection between the plunger and the sliding shoe can be effectively avoided.

Drawings

The drawings and examples of the present invention are provided to explain the present invention and do not constitute an undue limitation on the present invention.

FIG. 1 is a schematic structural diagram of a CY plunger pump;

fig. 2 is a schematic structural diagram of the present invention.

In the figure: the device comprises a spring inner sleeve 1, a steel ball 2, a return stroke disc 3, a plunger piston shoe assembly 4, an end cover 5, a variable head 6, a cylinder body 7, a spring outer sleeve 8, a central spring 9, a flow distribution disc 10, a transmission shaft 11, a shell 12, a piston shoe 13 and a plunger piston 14.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the CY plunger pump comprises a housing 12 and an end cover 5, wherein a transmission shaft 11 is arranged in the housing 12, a central spring 9 and a steel ball 2 are arranged at the end part of the transmission shaft, the central spring 9 is positioned between a spring inner sleeve 1 and a spring outer sleeve 8, and a return disc 10 and a sliding shoe plunger assembly 4 are arranged beside the steel ball 2. The piston shoe plunger assembly 4 is tightly attached to the variable head 6 through the steel ball 2 and the return disc 3 under the action of the central spring 9. The slipper plunger assembly 4 consists of a slipper 13 and a plunger 14, wherein the connecting part comprises a spherical hole for the plunger 14 and a ball head for the slipper 13, and the slipper 13 and the plunger 14 reversely wrap the slipper 13 through plastic deformation, so that the aim of connecting the two parts is fulfilled.

The piston shoe plunger assembly 4 and the return disc 3 are attached to the variable head 6 under the action of the central spring 9, the spring inner sleeve 1 and the steel ball 2. The reaction force of the center spring 9 acts on the cylinder 7 through the spring inner 1, so that the cylinder 7 is closely fitted to the oil distribution plate 10. The transmission shaft 11 is supported by a spline hole in the cylinder body 7 and two bearings arranged in the pump body as radial supports, a flat key is arranged on the transmission shaft 11, external power drives the transmission shaft 11 to rotate through the flat key, the transmission shaft 11 drives the cylinder body 7 to rotate through the spline, the cylinder body 7 drives the piston shoe plunger assembly 4 to rotate, and under the combined action of the central spring 9, the spring inner sleeve 1, the steel ball 2 and the return plate 3, the piston shoes in the piston shoe plunger assembly 4 are forced to do plane motion on the variable head 6. Because the piston and the piston shoe in the piston shoe and piston assembly 4 are combined together, the piston is forced to do telescopic reciprocating motion in the piston hole in the cylinder body 7, and the oil sucking and discharging action of the pump is completed.

Claims (2)

1. The connecting structure of the sliding shoe and the plunger in the CY plunger pump is characterized in that the sliding shoe (13) and the plunger (14) are connected in a mode that the sliding shoe (13) is provided with a ball head, the end part of the plunger (14) is provided with a spherical hole, and the spherical hole of the plunger (14) is subjected to plastic deformation to contain the ball head of the sliding shoe (13); the piston shoe plunger assembly (4) is tightly attached to the variable head (6) through the steel ball (7) and the return disc (3) under the action of the central spring (9).
2. 2. The connecting structure of the piston shoes and the plunger in the CY plunger pump according to claim 1, wherein the spherical hole part of the plunger (14) is made of alloy steel, the main body of the piston shoes (13) is made of alloy steel, and the friction pair surface of the ball heads of the piston shoes, which is matched with the variable head (6), is made of copper alloy.

Images