阅读说明：本技术 一种轴向柱塞泵回程盘的辅助机构 (Auxiliary mechanism of axial plunger pump return disc ) 是由 王振华 李辉 高梅柱 苏龙 陈浩 于 2020-12-10 设计创作，主要内容包括：本发明公开一种轴向柱塞泵回程盘的辅助机构,涉及轴向柱塞泵技术领域,包括耐磨盘、多个耐磨护板和多个连接组件,耐磨盘包括环形板和多个沿环形板外边缘周向设置的耳形凸出板,各耳形凸出板下方设置有一个耐磨护板,一个连接组件用于连接一个耐磨护板和一个耳形凸出板,连接组件用于将耐磨护板和耐磨盘固定于端盖上,耐磨护板包括弧形主体板和设置于弧形主体板内侧下部的弧形支撑板,耐磨盘和耐磨护板之间用于放置回程盘,弧形支撑板用于对回程盘进行支撑,弧形主体板的内侧面用于对回程盘进行定位。本发明提供的轴向柱塞泵回程盘的辅助机构能够保证滑靴副的油膜间隙,能够保证柱塞的可靠回程,并且可节约后期维修成本。(The invention discloses an auxiliary mechanism of a return disc of an axial plunger pump, which relates to the technical field of axial plunger pumps and comprises a wear-resisting disc, a plurality of wear-resisting guard plates and a plurality of connecting components, wherein the wear-resisting disc comprises an annular plate and a plurality of ear-shaped protruding plates circumferentially arranged along the outer edge of the annular plate, a wear-resisting guard plate is arranged below each ear-shaped protruding plate, one connecting component is used for connecting one wear-resisting guard plate and one ear-shaped protruding plate, the connecting components are used for fixing the wear-resisting guard plates and the wear-resisting disc on an end cover, each wear-resisting guard plate comprises an arc-shaped main body plate and an arc-shaped supporting plate arranged at the lower part of the inner side of the arc-shaped main body plate, the return disc is placed between the wear-resisting disc and the. The auxiliary mechanism of the return disc of the axial plunger pump provided by the invention can ensure the oil film clearance of the sliding shoe pair, can ensure the reliable return of the plunger and can save the later maintenance cost.)

1. An auxiliary mechanism of a return disc of an axial plunger pump is characterized by comprising a wear-resistant disc, a plurality of wear-resistant guard plates and a plurality of connecting components, the wear-resisting disc comprises an annular plate and a plurality of ear-shaped protruding plates arranged along the circumferential direction of the outer edge of the annular plate, a wear-resisting protective plate is arranged below each ear-shaped protruding plate, one connecting assembly is used for connecting one wear-resisting protective plate and one ear-shaped protruding plate, the connecting assembly is used for fixing the wear-resistant guard plate and the wear-resistant disc on the end cover, the wear-resistant guard plate comprises an arc-shaped main body plate and an arc-shaped supporting plate arranged at the lower part of the inner side of the arc-shaped main body plate, the wear-resisting dish with be used for placing the return stroke dish between the wear-resisting backplate, the arc backup pad is used for right the return stroke dish supports, the medial surface of arc main part board is used for right the return stroke dish is fixed a position.

2. The auxiliary mechanism of the axial plunger pump return disc as claimed in claim 1, wherein the connecting assembly comprises a plurality of fixing bolts, and each fixing bolt sequentially penetrates through the arc-shaped main body plate and the lug-shaped protruding plate from bottom to top and is used for being fixed on the end cover.

3. The auxiliary mechanism for the return disc of the axial plunger pump as claimed in claim 2, wherein a plurality of avoiding grooves are formed in the lower portion of the outer side of the arc-shaped main body plate along the circumferential direction, and one fixing bolt is disposed in one of the avoiding grooves.

4. The auxiliary mechanism for the return disc of the axial plunger pump according to claim 3, wherein a plurality of first bolt avoiding holes are formed in the arc-shaped main body plate, one first bolt avoiding hole is located above one avoiding groove, a plurality of second bolt avoiding holes are formed in the ear-shaped protruding plate, the second bolt avoiding holes correspond to the first bolt avoiding holes one by one, and one fixing bolt sequentially penetrates through the first bolt avoiding hole and the second bolt avoiding hole from bottom to top and is used for being fixed on the end cover.

5. The axial plunger pump return disc assist mechanism of claim 1, further comprising a plurality of positioning assemblies, one said positioning assembly for mounting to one said lug plate and one said wear plate.

6. The auxiliary mechanism for the return disc of the axial plunger pump as claimed in claim 5, wherein the positioning assembly comprises a plurality of first positioning pins, the ear-shaped protruding plate is provided with a plurality of positioning pin avoiding holes, the upper surface of the arc-shaped main body plate is provided with a plurality of positioning pin mounting grooves, and one of the first positioning pins passes through one of the positioning pin avoiding holes and is mounted in one of the positioning pin mounting grooves.

7. The axial plunger pump return disc assist mechanism of claim 6, further comprising a second detent pin, wherein the annular plate upper surface is provided with a detent pin slot, and wherein the second detent pin is mounted in the detent pin slot.

8. The auxiliary mechanism for the return disc of an axial plunger pump as claimed in claim 1, wherein the number of the lug-shaped protruding plates is two, and the outer side wall of the arc-shaped main body plate is coplanar with the outer side wall of the lug-shaped protruding plate.

9. The auxiliary mechanism for the return disc of the axial plunger pump as claimed in claim 3, wherein two of the avoiding grooves are formed in each of the arc-shaped main body plates, and the two avoiding grooves are respectively formed at two ends of the outer lower portion of each of the arc-shaped main body plates.

Technical Field

The invention relates to the technical field of axial plunger pumps, in particular to an auxiliary mechanism of a return disc of an axial plunger pump.

Background

For an axial plunger pump, oil film gaps between sliding shoes and a pressure bearing surface of a sliding shoe pair need to be strictly controlled so as to ensure that the sliding shoe pair is in an oil film contact state or an oil film and oil-free film mixed contact state; the roughness of the pressure bearing surface of the sliding shoe pair, particularly the roughness of the surface of the sliding shoe pair with higher hardness, needs to be strictly controlled to ensure that the surface of the sliding shoe pair is smooth as much as possible, and when the lower surface of the end cover is used as the pressure bearing surface of the sliding shoe pair, the shape error and the roughness of the surface of the end cover are difficult to meet the requirements due to the structural limitation of the end cover.

Disclosure of Invention

In order to solve the technical problems, the invention provides an auxiliary mechanism of a return disc of an axial plunger pump, which can ensure the oil film clearance of a sliding shoe pair and ensure the reliable return of a plunger, and can independently replace a wear-resistant disc after the pressure-bearing surface of the subsequent sliding shoe pair is damaged, thereby saving the maintenance cost.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides an auxiliary mechanism of a return disc of an axial plunger pump, which comprises a wear-resistant disc, a plurality of wear-resistant guard plates and a plurality of connecting components, the wear-resisting disc comprises an annular plate and a plurality of ear-shaped protruding plates arranged along the circumferential direction of the outer edge of the annular plate, a wear-resisting protective plate is arranged below each ear-shaped protruding plate, one connecting assembly is used for connecting one wear-resisting protective plate and one ear-shaped protruding plate, the connecting assembly is used for fixing the wear-resistant guard plate and the wear-resistant disc on the end cover, the wear-resistant guard plate comprises an arc-shaped main body plate and an arc-shaped supporting plate arranged at the lower part of the inner side of the arc-shaped main body plate, the wear-resisting dish with be used for placing the return stroke dish between the wear-resisting backplate, the arc backup pad is used for right the return stroke dish supports, the medial surface of arc main part board is used for right the return stroke dish is fixed a position.

Preferably, the connecting assembly comprises a plurality of fixing bolts, and each fixing bolt sequentially penetrates through the arc-shaped main body plate and the lug-shaped protruding plate from bottom to top and is used for being fixed on the end cover.

Preferably, arc main part board outside lower part is provided with a plurality of grooves of dodging along circumference, one fixing bolt sets up in one dodge in the groove.

Preferably, be provided with a plurality of first bolt dodge the hole on the arc main part board, one first bolt dodges the hole and is located one dodge the groove top, be provided with a plurality of second bolt dodge the hole on the ear shape protrusion board, second bolt dodge the hole with first bolt dodges the hole one-to-one, one fixing bolt passes one by supreme down in proper order first bolt dodges hole and one second bolt dodges the hole and is used for being fixed in on the end cover.

Preferably, the wear-resistant plate further comprises a plurality of positioning assemblies, and one positioning assembly is used for being mounted on one lug-shaped protruding plate and one wear-resistant protecting plate.

Preferably, locating component includes a plurality of first locating pins, it dodges the hole to be provided with a plurality of locating pins on the ear shape protrusion board, arc main part board upper surface is provided with a plurality of locating pin mounting grooves, one first locating pin passes one the locating pin dodges the hole and installs in one in the locating pin mounting groove.

Preferably, the positioning device further comprises a second positioning pin, wherein a positioning pin groove is formed in the upper surface of the annular plate, and the second positioning pin is installed in the positioning pin groove.

Preferably, the ear-shaped protruding plates are arranged in two, and the outer side wall of the arc-shaped main body plate is coplanar with the outer side wall of the ear-shaped protruding plate.

Preferably, each arc main body plate is provided with two dodging grooves, and the two dodging grooves are respectively arranged at two ends of the lower portion of the outer side of the arc main body plate.

Compared with the prior art, the invention has the following technical effects:

the auxiliary mechanism of the return disc of the axial plunger pump comprises a wear-resisting disc, a plurality of wear-resisting protection plates and a plurality of connecting assemblies, wherein the wear-resisting disc comprises an annular plate and a plurality of ear-shaped protruding plates circumferentially arranged along the outer edge of the annular plate, one wear-resisting protection plate is arranged below each ear-shaped protruding plate, each wear-resisting protection plate comprises an arc-shaped main body plate and an arc-shaped supporting plate arranged at the lower part of the inner side of the arc-shaped main body plate, the return disc is placed between the wear-resisting disc and the wear-resisting protection plates, the arc-shaped supporting plate is used for supporting the return disc, and the inner side. In the working process of the plunger pump, the return disc rotates to move, and a pair of friction pairs is formed by the return disc and the wear-resistant guard plate. A plurality of sliding shoes are arranged on the return disc, the wear-resistant disc and the sliding shoes form a sliding shoe pair, and the reasonable structural arrangement of the end cover, the wear-resistant guard plate and the wear-resistant disc ensures the gap between the sliding shoes and the wear-resistant disc, namely the oil film gap of the sliding shoe pair, so that the reliable return of the plunger can be ensured. The wear-resistant disc instead saves the material cost, the wear-resistant disc is easy to ensure the processing quality, the requirements on shape error and roughness of the pressure-bearing surface of the sliding shoe pair are ensured, the wear-resistant disc can be independently replaced after the subsequent pressure-bearing surface of the sliding shoe pair is damaged, and the maintenance cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an auxiliary mechanism of a return disc of an axial plunger pump provided by the invention;

FIG. 2 is a schematic view of the assembly of the auxiliary mechanism of the return disk of the axial plunger pump with the plunger shoe assembly and the return disk according to the present invention;

FIG. 3 is a schematic structural diagram of a wear-resistant guard plate in an auxiliary mechanism of a return disc of an axial plunger pump provided by the invention;

FIG. 4 is a schematic view of a first structure of a wear-resistant disc in an auxiliary mechanism of a return disc of the axial plunger pump provided by the invention;

FIG. 5 is a second structural diagram of a wear-resistant disc in the auxiliary mechanism of the return disc of the axial plunger pump provided by the invention;

fig. 6 is a schematic structural diagram of an end cap cooperating with an auxiliary mechanism of a return disc of an axial plunger pump provided by the present invention.

Description of reference numerals: 1. a wear-resistant guard plate; 101. an arc-shaped main body plate; 102. an arc-shaped support plate; 103. an avoidance groove; 104. a first bolt relief hole; 105. a positioning pin mounting groove; 2. a wear resistant disc; 201. an annular plate; 202. an ear-shaped projecting plate; 203. a second bolt relief hole; 204. a positioning pin avoidance hole; 205. a locating pin slot; 206. a circular arc positioning surface; 3. a return disk; 4. a slipper; 5. a plunger; 6. fixing the bolt; 7. a first positioning pin; 8. a second positioning pin; 9. an end cap; 10. an ear-shaped groove; 11. a raised block; 12. a threaded hole; 13. a first dowel hole; 14. a second dowel hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide an auxiliary mechanism of a return disc of an axial plunger pump, which can ensure the oil film clearance of a sliding shoe pair and the reliable return of a plunger, and can independently replace a wear-resistant disc after a pressure bearing surface of the subsequent sliding shoe pair is damaged, thereby saving the maintenance cost.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 6, the present embodiment provides an auxiliary mechanism for a return disc of an axial plunger pump, which comprises a wear-resistant disc 2, a plurality of wear-resisting backplate 1 and a plurality of coupling assembling, wear-resisting dish 2 includes annular plate 201 and a plurality of ear shape protrusion board 202 that set up along annular plate 201 outward flange circumference, each ear shape protrusion board 202 below is provided with a wear-resisting backplate 1, a coupling assembling is used for connecting a wear-resisting backplate 1 and an ear shape protrusion board 202, coupling assembling is used for being fixed in on end cover 9 wear-resisting backplate 1 and wear-resisting dish 2, wear-resisting backplate 1 includes arc main part board 101 and sets up in arc backup pad 102 of the inboard lower part of arc main part board 101, be used for placing return stroke dish 3 between wear-resisting dish 2 and the wear-resisting backplate 1, arc backup pad 102 is used for supporting return stroke dish 3, the medial surface of arc main part board 101 is used for fixing a position return stroke.

The wear-resistant guard plate 1 is used for positioning the return disc 3 in the auxiliary mechanism and applying force to the return disc 3 to force the plunger 5 to return, so that the oil suction action is completed. In addition, the wear-resistant guard plate 1 compresses the wear-resistant disc 2 in the axial direction, and the wear-resistant disc 2 is axially fixed through the connecting assembly. In the working process of the plunger pump, the return disc 3 rotates to move to form a pair of friction pairs with the wear-resistant guard plate 1, and in order to ensure the service life of the friction pairs, proper matched materials are selected to improve the wear resistance of the friction pairs according to the principle that materials with low intersolubility have strong anti-adhesion wear capacity, and the surface roughness of the friction pairs is strictly controlled. Specifically, the wear-resistant guard plate 1 is made of ZCuPb10Sn10, and the return disc 3 is made of GCr 15.

As shown in fig. 2, a plurality of sliding shoes 4 are mounted on the return disc 3, plungers 5 are mounted below the sliding shoes 4, the wear-resistant disc 2 and the sliding shoes 4 form a sliding shoe pair, and a gap between the sliding shoes 4 and the wear-resistant disc 2, namely an oil film gap of the sliding shoe pair, is ensured through reasonable structural arrangement of the end cover 9, the wear-resistant guard plate 1 and the wear-resistant disc 2, so that reliable return of the plungers 5 can be ensured. The sliding shoe 4 in the sliding shoe pair consisting of the wear-resisting disc 2 and the sliding shoe 4 is worn out most frequently, and causes the failure of the plunger pump. The material matching has an important influence on the friction performance of the sliding shoe pair, the sliding shoe 4 is made of a material with small hardness, small Poisson ratio, small specific heat, small elastic modulus and large heat conductivity, the wear-resistant disc 2 is made of a material with small Poisson ratio, large elastic modulus, large specific heat and large heat conductivity in order to achieve a good matching effect with the sliding shoe 4, the material is made of specific alloy steel and is high in price, the whole end cover 9 or a common large swash plate is made of the material, the material consumption is large, the cost is high, the wear-resistant disc 2 used as a substitute for the material saves the material cost, the wear-resistant disc 2 is easy to guarantee the processing quality, the requirements on the shape error and the roughness of a pressure-bearing surface of the sliding shoe pair are met, parts are easy to replace subsequently, and the maintenance cost is. Specifically, the wear-resistant disc 2 is made of 38CrMoALA, and the sliding shoe 4 is made of ZCuPb10Sn 10.

Specifically, the connecting assembly includes a plurality of fixing bolts 6, and each fixing bolt 6 sequentially penetrates through the arc-shaped main body plate 101 and the lug-shaped protruding plate 202 from bottom to top and is used for being fixed on the end cover 9. In order to prevent interference with the cylinder body, a plurality of avoiding grooves 103 are circumferentially provided at the lower portion of the outer side of the arc-shaped main body plate 101, and one fixing bolt 6 is provided in one avoiding groove 103.

As shown in fig. 3, a plurality of first bolt avoiding holes 104 are formed in the arc-shaped main body plate 101, one first bolt avoiding hole 104 is located above one avoiding groove 103, as shown in fig. 4, a plurality of second bolt avoiding holes 203 are formed in the ear-shaped protruding plate 202, the second bolt avoiding holes 203 correspond to the first bolt avoiding holes 104 one by one, and one fixing bolt 6 sequentially penetrates through one first bolt avoiding hole 104 and one second bolt avoiding hole 203 from bottom to top and is used for being fixed to the end cover 9.

The embodiment also comprises a plurality of positioning components, and one positioning component is used for being arranged on one lug-shaped protruding plate 202 and one wear-resistant protection plate 1.

The positioning assembly includes a plurality of first positioning pins 7, as shown in fig. 4, a plurality of positioning pin avoiding holes 204 are provided on the ear-shaped protruding plate 202, as shown in fig. 3, a plurality of positioning pin mounting grooves 105 are provided on the upper surface of the arc-shaped main body plate 101, and one first positioning pin 7 passes through one positioning pin avoiding hole 204 to be mounted in one positioning pin mounting groove 105.

In this embodiment, a second positioning pin 8 is further included, as shown in fig. 4, a positioning pin slot 205 is formed on the upper surface of the annular plate 201, and the second positioning pin 8 is installed in the positioning pin slot 205.

In this embodiment, two ear-shaped protrusion plates 202 are provided, and the outer side wall of the arc-shaped body plate 101 is coplanar with the outer side wall of the ear-shaped protrusion plate 202. The two ear-shaped protruding plates 202 are symmetrical structures, and an arc positioning surface 206 is formed between the two ear-shaped protruding plates 202. As shown in fig. 4, the upper surface of the wear-resistant disc 2 is an end cover supporting surface, and as shown in fig. 5, the lower surface of the wear-resistant disc 2 is a slipper auxiliary bearing surface.

In this embodiment, each of the arc-shaped main body plates 101 is provided with two avoiding grooves 103, and the two avoiding grooves 103 are respectively disposed at two ends of the outer lower portion of the arc-shaped main body plate 101. Each connecting assembly comprises two fixing bolts 6, each positioning assembly comprises two first positioning pins 7, and the upper surface of the annular plate 201 is provided with one positioning pin groove 205, namely one second positioning pin 8.

As shown in fig. 6, the lower surface of the end cover 9 for mounting the auxiliary mechanism of the return disc of the axial plunger pump in the present application forms a wear-resistant disc attachment surface, the lower surface of the end cover 9 is provided with two lug-shaped recesses 10, the two lug-shaped recesses 10 are separated by a protrusion 11, the circular arc positioning surface 206 of the wear-resistant disc 2 is matched with the inner side positioning surface of the protrusion 11 for positioning, each lug-shaped recess 10 is provided with two threaded holes 12 and two first positioning pin holes 13, and the wear-resistant disc attachment surface is provided with a second positioning pin hole 14 at a position outside the two lug-shaped recesses 10.

During installation, the return disc 3 is placed between the wear-resistant disc 2 and the wear-resistant guard plate 1, is installed in the second positioning pin hole 14 through the second positioning pin 8, and the arc positioning surface 206 is in contact with the inner side positioning surface of the protruding block 11, so that the wear-resistant disc 2 is positioned; each first positioning pin 7 on the wear-resistant guard plate 1 passes through one positioning pin avoiding hole 204 and is arranged in one first positioning pin hole 13, so that the wear-resistant guard plate 1 is positioned; each fixing bolt 6 passes through the first bolt avoiding hole 104 and the second bolt avoiding hole 203 in sequence to be installed in one threaded hole 12, thereby fixing the wear-resistant disc 2 and the wear-resistant guard plate 1.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.