CN216518580U

CN216518580U - Plunger with offset mass for axial plunger pump

Info

Publication number: CN216518580U
Application number: CN202122755591.1U
Authority: CN
Inventors: 杨广文; 赵玺璨; 周宇; 李跃军; 曹明; 孟繁博; 李瀚赓
Original assignee: Beijing Huade Hydraulic Industrial Group Co ltd
Current assignee: Beijing Huade Hydraulic Industrial Group Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-13
Anticipated expiration: 2031-11-11

Abstract

The utility model relates to a mass offset plunger for an axial plunger pump, which is characterized in that an eccentric ring with radial mass offset is arranged in a plunger hole, and the plunger is of a combined structure, wherein the center of a through hole of the eccentric ring is not overlapped with the center of a circular ring, or the center of the through hole of the eccentric ring is overlapped with the center of the excircle of the eccentric ring, and a waist-shaped hole is arranged on one side of the eccentric ring to reduce the weight of the side, so that the eccentric ring realizes mass offset. Through the mechanical cooperation of the plunger and the built-in eccentric ring, the eccentric ring enables the plunger to rotate stably when the pump works. The utility model can effectively improve the oil pumping speed of the plunger pump, improve the mechanical efficiency, the volume efficiency and the service life of the pump, and reduce the noise, thereby achieving the purposes of energy conservation and environmental protection. By adopting the combined plunger, the structure is compact.

Description

Plunger with offset mass for axial plunger pump

Technical Field

The utility model relates to a plunger for a hydraulic axial plunger pump in the field of hydraulic machinery, in particular to a plunger with an eccentric ring combined with the hydraulic axial plunger pump.

Background

The hydraulic axial plunger pump is mainly composed of a transmission shaft, a shell, a swash plate, a plunger, a cylinder body, a spring, a bearing, a valve plate, a rear cover and the like. The plungers are evenly distributed in the cylinder along the circumference. The plunger of the axial plunger pump has four structures, namely, a plunger body is hinged with a connecting rod; secondly, the mode that the conical plunger rod is embedded in the open piston ring is adopted; thirdly, an integral plunger mode; fourthly, the combination mode of the integral plunger and the return spring in the hole is adopted. The plunger piston rotates and reciprocates in a plunger hole of the cylinder body, is complex in stress and is a key friction pair.

At present, when the axial plunger pump works in practice, the plunger is one of main parts influencing the service life of the axial plunger pump. Under the motion state, due to the influence of centrifugal force, the plunger and the plunger hole of the cylinder body are easy to be seriously extruded and abraded, and the service life is shortened.

In view of the above-mentioned defects of the existing axial plunger pump plunger, the present inventors have made continuous research and design, and after repeated trial and improvement, finally created the present invention with practical value.

Disclosure of Invention

The utility model aims to overcome the defects of collision and extrusion of the existing axial plunger pump plunger on the wall of a cylinder plunger hole in a motion state, and provides the plunger for the axial plunger pump with a novel structure, which has adjustable working state and offset mass.

Another object of the present invention is to provide a plunger mass offset for an axial plunger pump, which solves the technical problem of providing a plunger for an axial plunger pump with high pressure, thereby being more practical.

The object of the present invention and the technical problem to be solved are achieved by the following technical means. The utility model provides a mass-biased plunger for an axial plunger pump, which is of a combined plunger structure, wherein a spherical ball part of the plunger is sleeved in a sliding shoe to form a plunger sliding shoe pair, and the mass-biased plunger further comprises an eccentric ring with radial mass bias, the eccentric ring is arranged at the bottom end of an inner hole of the plunger, and the inner diameter surface of the plunger is combined with the outer diameter of the eccentric ring.

Furthermore, the center of the through hole of the eccentric ring is not overlapped with the center of the circular ring, so that the eccentric ring realizes mass offset, and the size of the mass gravity center position of the eccentric ring is set according to the requirement.

Furthermore, the center of the through hole of the eccentric ring coincides with the center of the excircle of the eccentric ring, and a waist-shaped hole is arranged on one side of the eccentric ring to reduce the weight of the side, so that the circular ring realizes mass offset.

Further, still include eccentric ring anti-disengaging mechanism, eccentric ring anti-disengaging mechanism sets up at the plunger hole, eccentric ring anti-disengaging mechanism include circlip and gasket for the hole, gasket and circlip for the hole set up and are being close to plunger inner bottom position, the gasket setting is below the eccentric ring, circlip for the hole sets up below the gasket.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. It has at least the following advantages:

1. the utility model adopts the combined plunger with the eccentric ring, so that the axial plunger pump can reduce the influence of centrifugal force, rotate stably, reduce extrusion and abrasion and prolong the service life when rotating.

2. The utility model can effectively improve the oil pumping speed of the plunger pump and improve the mechanical efficiency and the volumetric efficiency of the pump.

3. The utility model reduces the noise and achieves the aims of energy saving and environmental protection.

4. The utility model adopts the combined plunger, and has compact structure.

5. The utility model is widely applicable to various types of hydraulic axial plunger pumps, thereby being more practical.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic sectional view of a plunger pair of an axial plunger pump in a first embodiment of the utility model.

Fig. 2 is a schematic structural view of an eccentric ring according to a first embodiment of the present invention.

Fig. 3 is a schematic sectional structural view of a plunger pair of an axial plunger pump in another embodiment of the utility model.

Fig. 4 is a schematic structural view of a mass eccentric ring beside a through hole according to another embodiment of the present invention.

FIG. 5: schematic sectional structure diagram of axial plunger pump

1: the sliding shoe 2: plunger:

3: the eccentric ring 4: gasket

5: elastic retainer ring for hole

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the mass-biased plunger for an axial plunger pump according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1 and 2, a mass-biased plunger for an axial plunger pump according to a preferred first embodiment of the present invention is a combined plunger structure, which mainly includes: a plunger 2 and a radial mass-biased eccentric ring 3, wherein: the spherical part of the plunger 2 is sleeved in the sliding shoe 1, the plunger 2 and the sliding shoe form a plunger sliding shoe pair 6, the eccentric ring 3 is arranged in an inner hole of the plunger 2, and the inner hole diameter surface of the plunger 2 is combined with the outer diameter of the eccentric ring 3. The center of the through hole of the eccentric ring 3 is not overlapped with the center of the circular ring, so that the eccentric ring 3 realizes mass offset, and the size of the mass gravity center position of the eccentric ring 3 is determined according to the requirement. Still include eccentric ring anti-disengaging mechanism, eccentric ring anti-disengaging mechanism sets up at the plunger hole, and eccentric ring anti-disengaging mechanism includes circlip 5 and gasket 4 for the hole, and gasket 4 and circlip 5 for the hole set up and are being close to 2 inner bottom positions in the plunger, and gasket 4 sets up below eccentric ring 3, and circlip 5 for the hole sets up below gasket 4, and eccentric ring 3, gasket 4, circlip 5 for the hole are below the 1/2 of plunger hole height, and it can to be close to the bottom position.

Referring to fig. 4 and 5, in the mass-biased plunger for the axial plunger pump according to the preferred second embodiment of the present invention, the center of the through hole of the eccentric ring 3 coincides with the center of the outer circle of the eccentric ring, and a waist-shaped hole is formed at one side of the eccentric ring 3 to reduce the weight of the side, so that the ring is mass-biased.

Referring to the schematic cross-sectional structural view of the axial plunger pump shown in fig. 5, fig. 5 shows the installation position of the plunger shoe pair 6 in the axial plunger pump. The plunger and the piston shoe form a plunger piston shoe pair, the plunger piston shoe pair penetrates through the return plate and is inserted into the cylinder body hole, and the plunger piston shoe pair reciprocates in the cylinder body hole during working.

According to the utility model, the plunger piston is mechanically matched with the built-in eccentric ring, and the eccentric ring enables the plunger piston to rotate stably when the pump works. The utility model can effectively improve the oil pumping speed of the plunger pump, improve the mechanical efficiency, the volume efficiency and the service life of the pump, and reduce the noise, thereby achieving the purposes of energy conservation and environmental protection. The combined plunger has compact structure

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an axial plunger pump is with quality biased plunger, for combination formula plunger structure, wherein the ball part of plunger (2) cup joints in piston shoes (1), constitutes the vice (6) of plunger piston shoes, its characterized in that: still include radial mass offset's eccentric ring (3), eccentric ring (3) set up the hole bottom at plunger (2), the combination of the hole footpath face of plunger (2) and the external diameter of eccentric ring (3).

2. The mass-biased plunger for the axial plunger pump according to claim 1, characterized in that the center of the through hole of the eccentric ring (3) is not overlapped with the center of the circular ring, so that the eccentric ring realizes mass bias, and the position of the mass center of gravity of the eccentric ring (3) is set according to the requirement.

3. The mass-biased plunger for the axial plunger pump according to claim 1, wherein the center of the through hole of the eccentric ring (3) coincides with the center of the outer circle of the eccentric ring, and a waist-shaped hole is formed at one side of the eccentric ring (3) to reduce the weight of the side, thereby achieving mass-biasing of the ring.

4. The mass-biased plunger of claim 2, wherein: still include eccentric ring anti-disengaging mechanism, eccentric ring anti-disengaging mechanism sets up at the plunger hole, eccentric ring anti-disengaging mechanism include for the hole circlip (5) and gasket (4), gasket (4) and hole circlip (5) set up and are being close to plunger (2) bottom end position, gasket (4) set up below eccentric ring (3), hole circlip (5) set up below gasket (4).

5. The mass-biased plunger of claim 3, wherein: still include eccentric ring anti-disengaging mechanism, eccentric ring anti-disengaging mechanism sets up at the plunger hole, eccentric ring anti-disengaging mechanism for hole circlip (5) and gasket (4), gasket (4) and hole circlip (5) set up and are being close to plunger (2) bottom end position, gasket (4) set up below eccentric ring (3), hole circlip (5) set up below gasket (4).