CN206448936U - A kind of piston structure of Novel plunger pump - Google Patents

Abstract

The utility model discloses a plunger structure of a novel plunger pump, which comprises a sliding shoe and a plunger body. The end face of the sliding shoe is provided with a ball head, and one side of the plunger body is provided with a ball socket. The ball head protrudes into the ball socket and cooperates with the ball socket, wherein a sintered copper layer is provided on the side of the shoe opposite to the ball head, and the shoe and The plunger body is made of alloy steel and nitrided steel respectively, the plunger body includes a base body and a connecting body, the ball socket is arranged on the connecting body, and the base body and the connecting body are detachable connection. The utility model arranges the ball head and the ball socket on the slide shoe and the plunger body respectively, and the slide shoe and the plunger body are respectively made of alloy steel and nitrided steel. When the ball socket wraps the ball head, the steel material wraps the steel Compared with the copper material, the strength of the wrapped material is greatly improved, which significantly increases the pull-off force between the sliding shoe and the plunger body, and improves the service life of the plunger pump.

Description

The plunger structure of a new plunger pump

technical field

The utility model relates to the technical field of plunger pumps, in particular to a plunger structure of a novel plunger pump.

Background technique

As shown in Figure 1, the plunger structure of the traditional new plunger pump generally adopts the form of positive package, that is, the material of the sliding shoe is all copper, the ball socket is set in the sliding shoe 1′, and the ball head is set on the plunger body 2′ , the sliding shoe 1′ deforms in the mold during wrapping, and the ball head is wrapped in it. The copper material used in the sliding shoe 1′ leads to low strength of the overall structure after wrapping, and the gap between the sliding shoe 1′ and the plunger body 2′ The pull-off force is small, which directly leads to a reduction in the service life of the plunger structure.

Utility model content

The utility model mainly solves the technical problems existing in the prior art, thereby providing a plunger structure of a novel plunger pump with high strength and long service life.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

The plunger structure of the novel plunger pump provided by the utility model includes a sliding shoe and a plunger body. A ball head is provided on the end face of the sliding shoe, and a ball socket is provided on one side of the plunger body. The ball head protruding into the ball socket and matching with the ball socket, wherein a sintered copper layer is provided on the side of the sliding shoe opposite to the ball head, and the sliding shoe and the The plunger body is made of alloy steel and nitrided steel respectively. The plunger body includes a base body and a connecting body. The ball socket is arranged on the connecting body, and the base body and the connecting body are detachably connected. .

Further, a protrusion is provided on the base body, a groove is provided on the connecting body, and the protrusion is matched with the thread of the groove.

Further, a sealing ring is provided between the base body and the connecting body.

Further, the interior of the sliding shoe is also provided with a central main oil injection hole and a plurality of auxiliary oil injection holes, the plurality of auxiliary oil injection holes are arranged symmetrically along the axis of the sliding shoe, and the auxiliary oil injection holes The inlet end is connected with the central main oil injection hole, and the outlet ends are distributed on the same circumference of the side wall of the copper layer.

Further, an annular groove is also provided between the ball head and the end surface of the shoe.

The beneficial effect of the utility model lies in that: by setting the ball head and the ball socket on the slide shoe and the plunger body respectively, and making the slide shoe and the plunger body respectively with alloy steel and nitrided steel, when the ball socket wraps the ball head The steel material is wrapped with the steel material, and the strength after wrapping is greatly improved compared with the copper material, which significantly increases the pull-off force between the sliding shoe and the plunger body, and improves the service life of the plunger pump.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the plunger structure of novel plunger pump in the prior art;

Fig. 2 is a structural schematic diagram of the plunger structure of the new plunger pump of the present invention.

detailed description

The preferred embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to make a clearer definition of the protection scope of the utility model.

Referring to Fig. 2, the plunger structure of the novel plunger pump of the present utility model includes a sliding shoe 1 and a plunger body 2, the end face of the sliding shoe 1 is provided with a ball head 3, and one side of the plunger body 2 is provided with a ball Socket 4, the ball head 3 extends into the ball socket 4, and cooperates with the ball socket 4, wherein a sintered copper layer 8 is provided on the side opposite to the ball head 3 on the shoe 1, and the shoe 1 and The plunger body 2 is made of alloy steel and nitrided steel respectively. The plunger body 2 includes a base body 21 and a connecting body 22. The ball socket 4 is arranged on the connecting body 22. The base body 21 and the connecting body 22 are detachably connected. For plunger bodies 2 of different lengths, base bodies 21 and connecting bodies 22 of different lengths can be selected for assembly, thereby reducing production costs and expanding their application range. In this embodiment, the sliding shoe and the plunger body can be made of 42CrMo and 38CrMoAlA respectively.

The utility model arranges the ball head 3 and the ball socket 4 on the sliding shoe 1 and the plunger body 2 respectively, and the sliding shoe 1 and the plunger body 2 are respectively made of alloy steel and nitrided steel, and the ball socket 4 wraps the ball The head 3 is wrapped with steel material, and the strength after wrapping is greatly improved compared with copper material, which significantly increases the pull-off force between the sliding shoe 1 and the plunger body 2, and improves the use of the plunger pump. life.

In this embodiment, the base body 21 is provided with a protrusion 23 , and the connecting body 22 is provided with a groove 24 , and the protrusion 23 and the groove 24 are screwed together. In different occasions, other ways can also be used for detachable connection.

Further, in order to avoid oil leakage between the base body 21 and the connecting body 22 , a sealing ring 25 is also provided between the base body 21 and the connecting body 22 .

Preferably, the inside of the shoe 1 is also provided with a central main oil injection hole 5 and a plurality of auxiliary oil injection holes 6, and the plurality of auxiliary oil injection holes 6 are arranged symmetrically along the axis of the shoe 1, and the inlets of the auxiliary oil injection holes 6 The end communicates with the central main fuel injection hole 5, and its outlet ends are distributed on the same circumference of the side wall of the copper layer 8. In this embodiment, when the hydraulic oil enters the central main oil injection hole 5 and the auxiliary oil injection hole 6 of the slide shoe 1 through the plunger body 2, it is sprayed out, and an oil film is formed on the surface of the copper layer 8. Under high-speed rotation, the oil film The generation is faster, more uniform and more stable, which ensures the good operation of the sliding shoe 1 and improves its service life.

In the present utility model, in order to avoid interference between the sliding shoe 1 and the plunger body 2 during relative rotation, an annular groove 7 is provided between the ball head 3 and the end surface of the sliding shoe 1 .

The above are only specific implementations of the present utility model, but the protection scope of the present utility model is not limited thereto, and any changes or replacements that do not go through creative labor should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (5)

1. a kind of piston structure of Novel plunger pump, including piston shoes and plunger body, it is characterised in that the end face of the piston shoes is provided with One bulb, the side of the plunger body is provided with a ball-and-socket, and the bulb is extend into the ball-and-socket, and matches with the ball-and-socket Close, wherein, the side relative with the bulb is additionally provided with the layers of copper of a sintering, and the piston shoes and the post on the piston shoes Steel alloy is respectively adopted in cock body and nitrated steel is made, and the plunger body includes matrix and connector, and the ball-and-socket is arranged on On the connector, described matrix and the connector detachable connection.

2. the piston structure of Novel plunger pump as claimed in claim 1, it is characterised in that described matrix is raised provided with one, The connector is provided with a groove, and the raised screw thread with the groove coordinates.

3. the piston structure of Novel plunger pump as claimed in claim 2, it is characterised in that described matrix and the connector it Between be additionally provided with sealing ring.

4. the piston structure of Novel plunger pump as claimed in claim 3, it is characterised in that during the inside of the piston shoes is additionally provided with Heart main jet oilhole and multiple auxiliary fuel injector holes, axisymmetrical of multiple auxiliary fuel injector holes along the piston shoes are set, and described The entrance point in auxiliary fuel injector hole is connected with the center main jet oilhole, and its port of export is distributed in the same circle of layers of copper side wall Zhou Shang.

5. the piston structure of Novel plunger pump as claimed in claim 4, it is characterised in that the end of the bulb and the piston shoes Annular recess is additionally provided between face.