CN217055578U

CN217055578U - Gear pump

Info

Publication number: CN217055578U
Application number: CN202220133442.3U
Authority: CN
Inventors: 梁钧; 周镐哲
Original assignee: Shanghai Hushi Refrigeration Equipment Technology Co ltd
Current assignee: Shanghai Fuhuite Pump Manufacturing Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-26
Anticipated expiration: 2032-01-18

Abstract

The application discloses a gear pump, which comprises a pump body and a driving motor, wherein the pump body comprises a shell assembly and a valve core assembly, the shell assembly comprises a sleeve, and a first end cover and a second end cover which are respectively connected with two ends of the sleeve, sealing elements are arranged among the first end cover, the second end cover and the sleeve, the first end cover is provided with a feeding hole and a discharging hole, and the second end cover is fixedly connected with the driving motor; the valve core assembly is arranged in the shell assembly and comprises a gear ring in clearance fit with the sleeve and a gear arranged in the gear ring, the gear is eccentrically arranged relative to the gear ring, an output shaft of the driving motor penetrates through the second end cover to be connected with the gear, and the axial direction of the gear, the axial direction of the gear ring and the axial direction of the output shaft are arranged in parallel. Compared with the prior art, the scheme has the advantages that the connection part of the feed inlet of each pipeline and the gear pump and the connection part of the discharge port of each pipeline are located on the same side of the gear pump, the installation space between the pipeline and the gear pump is reduced, and therefore the requirement of the gear pump on the installation space is reduced.

Description

Gear pump

Technical Field

The application relates to the field of fluid machinery, in particular to a gear pump.

Background

Gear pumps are hydraulic power elements widely used in hydraulic systems, and are hydraulic elements that convey or pressurize fluid by means of changes in the size and spatial movement of the working volume formed between meshing gears when the gears rotate.

The gear pump comprises a shell, and parts such as a gear and a gear ring which are arranged in the shell and are in eccentric engagement, when the gear rotates, the space volume of the disengagement side of the gear and the gear ring is changed from small to large to form a liquid suction cavity for sucking liquid from a feed inlet, the space volume of the engagement side of the gear and the gear ring is changed from large to small to form a liquid pressing cavity for extruding the liquid into a discharge outlet, and liquid in the liquid suction cavity and the liquid pressing cavity is relatively low-pressure liquid and high-pressure liquid respectively.

When the existing gear pump is connected with an external pipeline, the occupied space is large.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the present application provides a gear pump, including the pump body and driving motor, the pump body includes:

the shell assembly comprises a sleeve, and a first end cover and a second end cover which are respectively connected with two ends of the sleeve, sealing elements are arranged among the first end cover, the second end cover and the sleeve, the first end cover is provided with a feeding hole and a discharging hole, and the second end cover is fixedly connected with the driving motor;

the valve core assembly is arranged in the shell assembly and comprises a gear ring in clearance fit with the sleeve and a gear arranged in the gear ring, the gear is eccentrically arranged relative to the gear ring, an output shaft of the driving motor penetrates through the second end cover to be connected with the gear, and the axial direction of the gear, the axial direction of the gear ring and the axial direction of the output shaft are arranged in parallel.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, a liquid suction cavity and a liquid pressing cavity are formed between the gear and the gear ring;

the inner side of the first end cover is provided with a first liquid guide groove and a second liquid guide groove which are positioned on two radial sides of the output shaft, the first liquid guide groove communicates the feed port with the liquid suction cavity, and the second liquid guide groove communicates the discharge port with the hydraulic cavity.

Optionally, the first liquid guiding groove and the second liquid guiding groove both extend along the circumferential direction of the gear, and are respectively butted with the liquid suction cavity and the liquid pressing cavity.

Optionally, the first liquid guiding groove and the second liquid guiding groove both have an inner edge and an outer edge which define the radial width thereof, each inner edge is concentrically arranged with the gear ring, and each outer edge is concentrically arranged with the gear.

Optionally, a first transition cavity and a second transition cavity extending radially are further arranged in the first end cover, the feed inlet is communicated with the first liquid guide groove through the first transition cavity, and the discharge outlet is communicated with the second liquid guide groove through the second transition cavity.

Optionally, a supporting groove for supporting the output shaft is further arranged on the inner side of the first end cover;

the supporting groove is communicated with the first liquid guide groove or the first transition cavity through a connecting channel.

Optionally, the inside of second end cover is provided with first vice liquid guide groove and the vice liquid guide groove of second, first vice liquid guide groove with first liquid guide groove opposite arrangement and with the imbibition chamber is linked together, the vice liquid guide groove of second with second liquid guide groove opposite arrangement and with the hydrops pressing cavity is linked together.

Optionally, the first sub liquid guide groove and the first liquid guide groove are the same in shape, and the second sub liquid guide groove and the second liquid guide groove are the same in shape.

Optionally, the second end cover and the housing of the driving motor are integrally arranged.

Optionally, the gear pump has an axial direction in space, along the axial direction of the gear pump, the length of the gear pump is L1, the length of the pump body is L2, and L1 is satisfied: l2 ═ 1: (0.2 to 0.5);

the axial length of the gear pump is 10cm-20 cm.

The utility model provides a gear pump, the feed inlet of each pipeline and gear pump is located the homonymy of gear pump with the junction of discharge gate, reduces the installation space between pipeline and the gear pump to enough reduce the requirement of gear pump to installation space.

Drawings

FIG. 1 is a schematic diagram of a gear pump according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of another perspective of the gear pump of FIG. 2;

FIG. 3 is a schematic view of a portion of the gear pump of FIG. 1;

FIG. 4 is a partial cross-sectional structural view of the gear pump of FIG. 3;

FIG. 5 is a schematic view of the driving motor shown in FIG. 1;

FIG. 6 is a schematic view of the driving motor shown in FIG. 5 from another perspective;

FIG. 7 is a schematic structural view of the first endcap of FIG. 2;

FIG. 8 is a cross-sectional view A-A of the first endcap of FIG. 7;

FIG. 9 is a schematic view of the first end cap of FIG. 2 from another perspective;

FIG. 10 is a cross-sectional view of the first endcap of FIG. 2;

fig. 11 is a cross-sectional view B-B of the first endcap of fig. 10.

The reference numerals in the figures are illustrated as follows:

100. a pump body;

10. a housing assembly; 11. a sleeve; 12. a first end cap; 121. a feed inlet; 122. a discharge port; 123. a first liquid guide groove; 1231. an inner edge; 1232. an outer edge; 124. a second liquid guide groove; 125. a first transition chamber; 126. a second transition chamber; 127. a support groove; 128. a connecting channel; 13. a second end cap; 131. a first secondary liquid guide groove; 132. a second secondary liquid guide groove; 14. a base;

20. a valve core assembly; 21. a ring gear; 211. an annular frame; 212. internal teeth; 22. a gear; 221. a shaft hole; 222. an outer tooth; 23. an engaging side; 24. a release side; 25. a liquid suction chamber; 26. a fluid pressurizing chamber;

200. a drive motor; 201. a housing; 202. and an output shaft.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 11, the present application provides a gear pump, which includes a pump body 100 and a driving motor 200, wherein the pump body 100 includes a housing assembly 10 and a valve core assembly 20, and the valve core assembly 20 is disposed in the housing assembly 10. The housing assembly 10 has a cavity for mounting the valve core assembly 20 therein, and a feed port 121 and a discharge port 122 which are communicated with the cavity, wherein liquid (e.g. oil) enters the cavity through the feed port 121 and is pumped out through the discharge port 122 under the action of the valve core assembly 20.

The housing assembly 10 comprises a sleeve 11, and a first end cap 12 and a second end cap 13 respectively connected with two ends of the sleeve 11, wherein the sleeve 11, the first end cap 12 and the second end cap 13 enclose a cavity; the first end cap 12 and the second end cap 13 are respectively attached to the end face of the sleeve 11 and fixedly connected with the sleeve 11 by bolts and the like; sealing members (e.g., sealing rings) are disposed between the first end cap 12 and the sleeve 11 and between the second end cap 13 and the sleeve 11, so as to enhance the sealing performance of the cavity. Wherein, the axial both ends face of sleeve 11 has the recess that sets up around the cavity circumference, and the sealing member inlays and adorns in the recess.

The first end cover 12 is provided with a feeding hole 121 and a discharging hole 122, and the second end cover 13 is fixedly connected with the driving motor 200. In some embodiments, the bottom of the sleeve 11 is also provided with a base 14 for supporting the gear pump.

The valve core assembly 20 comprises a gear ring 21 which is in clearance fit with the sleeve 11 and a gear 22 which is arranged in the gear ring 21, the gear 22 is eccentrically arranged relative to the gear ring 21, and an output shaft 202 of the driving motor 200 is connected with the gear 22 through the second end cover 13. A liquid suction cavity 25 and a hydraulic cavity 26 are formed between the gear 22 and the gear ring 21, the liquid suction cavity 25 is communicated with the feeding hole 121, and the hydraulic cavity 26 is communicated with the discharging hole 122. Both axial sides of the ring gear 21 and both axial sides of the gear 22 are respectively abutted against the first end cap 12 and the second end cap 13; the second end cap 13 has a through hole through which the output shaft 202 passes; the axial direction of the gear 222, the axial direction of the ring gear 212, and the axial direction of the output shaft 202 are arranged in parallel.

Wherein, when the gear 22 and the gear ring 21 are meshed with each other: the engaged side is an engaged side 23, and the mutually separated sides are disengaged sides 24; when the gear 22 rotates, the space volume of the meshing side 23 to the disengaging side 24 is changed from small to large to form a liquid suction cavity 25 communicated with the feed port 121, and the space volume of the meshing side 23 to the disengaging side 24 is changed from large to small to form a hydraulic cavity 26 communicated with the discharge port 122. For example, in fig. 3, the meshing side 23 of the gear 22 and the ring gear 21 is located at the top of the gear 22, the corresponding suction chamber 25 is located on the right side of the gear 22, and the hydraulic chamber 26 is located on the left side of the gear 22.

The gear ring 21 comprises an annular frame 211 and a plurality of internal teeth 212 distributed on the inner edge of the annular frame 211, and the outer side wall of the annular frame 211 is in rotating fit with the inner wall of the shell 201; the gear 22 is fitted in the ring frame 211 and has a plurality of external teeth 222 meshing with the ring gear 21; the gear 22 has a shaft hole 221, and one end of the output shaft 202 is inserted into the shaft hole 221 of the gear 22. As shown, the number of the inner teeth 212 is 7, and the number of the outer teeth 222 is 6.

In the first end cap 12, referring to one embodiment, the first liquid guiding groove 123 and the second liquid guiding groove 124 are disposed on the inner side of the first end cap 12 and located on two radial sides of the output shaft 202, the first liquid guiding groove 123 communicates the feed port 121 with the liquid suction cavity 25, and the second liquid guiding groove 124 communicates the discharge port 122 with the liquid pressing cavity 26, so as to increase the overlapping area with the liquid suction cavity 25 and the liquid pressing cavity 26.

First liquid guide groove 123 and second liquid guide groove 124 both extend along the circumferential direction of gear 22 and are respectively butted with liquid suction cavity 25 and liquid pressing cavity 26. The first liquid guiding groove 123 and the second liquid guiding groove 124 each have an inner edge 1231 and an outer edge 1232 defining a radial width thereof, each inner edge 1231 is disposed concentrically with the ring gear 21, and each outer edge 1232 is disposed concentrically with the gear 22. For example, in the drawings, the extending paths of the first liquid guiding groove 123 and the second liquid guiding groove 124 are substantially arc-shaped structures; the inner edge 1231 and the outer edge 1232 are both arc-shaped; the first liquid guide groove 123 is higher than the second liquid guide groove 124.

An excessively small inner diameter of the ring gear 21 may cause the first liquid guiding groove 123 to be too close to the second liquid guiding groove 124, and may cause the feed opening 121 to be too close to the discharge opening 122, thereby affecting the installation of the pump body 100 and the external pipe. In order to solve the technical problem, a first transition cavity 125 and a second transition cavity 126 extending radially are further disposed in the first end cap 12, the feed inlet 121 is communicated with the first liquid guiding groove 123 through the first transition cavity 125, and the discharge outlet 122 is communicated with the second liquid guiding groove 124 through the second transition cavity 126.

In this embodiment, the inner side of the first end cap 12 is further provided with a supporting groove 127, one side of the supporting groove 127 facing the output shaft 202 is open, the other side of the supporting groove 127 facing away from the output shaft 202 is closed, and the supporting groove 127 is used for supporting the output shaft 202 and enabling the output shaft 202 to rotate in the supporting groove 127. The support groove 127 is communicated with the first liquid guide groove 123 or the first transition cavity 125 through a connecting channel 128, so that liquid can flow into the support groove 127 to lubricate between the end of the output shaft 202 and the support groove 127. Wherein, one end of the connecting channel 128 is communicated with one side of the supporting groove 127 adjacent to the closed end, and the other end is communicated with the first transition cavity 125; the extending path of the connecting channel 128 is linear, and the angle between the extending direction of the connecting channel 128 and the extending direction of the supporting groove 127 is 20 degrees to 40 degrees (for example, 33.5 degrees).

In the second end cap 13, referring to one embodiment, a first sub liquid guiding groove 131 and a second sub liquid guiding groove 132 are disposed on the inner side of the second end cap 13, the first sub liquid guiding groove 131 is communicated with the liquid absorbing cavity 25, and the second sub liquid guiding groove 132 is communicated with the hydraulic cavity 26. The first sub liquid guiding groove 131 is arranged opposite to the first liquid guiding groove 123, and the second sub liquid guiding groove 132 is arranged opposite to the second liquid guiding groove 124; the first sub liquid guide groove 131 has the same shape as the first liquid guide groove 123, and the second sub liquid guide groove 132 has the same shape as the second liquid guide groove 124.

The second end cover 13 is integrally arranged with the housing 201 of the driving motor 200, so that a gap between the second end cover 13 and the housing 201 can be avoided, the sealing performance between the second end cover 13 and the housing 201 can be improved, and meanwhile, the assembly process between the driving motor 200 and the pump body 100 can be reduced.

In the present embodiment, the gear pump has an axial direction in space, along the axial direction of the gear pump, the length of the gear pump is L1, the length of the pump body 100 is L2, and L1 is satisfied: l2 ═ 1: (0.2-0.5); the axial length of the gear pump is 10cm-20cm, so that the structure of the gear pump is more compact. For example, the gear pump has a length of 14cm and the pump body 100 has a length of 3.2cm in the axial direction of the gear pump.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not to be construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application.

Claims

1. Gear pump, including the pump body and driving motor, its characterized in that, the pump body includes:

the valve core assembly is arranged in the shell assembly and comprises a gear ring in clearance fit with the sleeve and a gear arranged in the gear ring, the gear is eccentrically arranged relative to the gear ring, and an output shaft of the driving motor penetrates through the second end cover to be connected with the gear.

2. The gear pump of claim 1, wherein a suction cavity and a pressure cavity are formed between the gear and the ring gear;

3. The gear pump of claim 2, wherein the first and second fluid channels each extend circumferentially of the gear and interface with the suction and pressure chambers, respectively.

4. The gear pump of claim 3, wherein the first and second fluid conducting channels each have an inner edge and an outer edge defining a radial width thereof, each inner edge being disposed concentric with the ring gear and each outer edge being disposed concentric with the gear.

5. The gear pump of claim 3, wherein a first transition cavity and a second transition cavity are further disposed in the first end cap, the feed port is in communication with the first fluid-conducting groove through the first transition cavity, and the discharge port is in communication with the second fluid-conducting groove through the second transition cavity.

6. The gear pump of claim 5, wherein the inner side of the first end cap is further provided with a support groove for holding the output shaft;

the support groove is communicated with the first liquid guide groove or the first transition cavity through a connecting channel.

7. The gear pump of claim 3 or 4, wherein a first auxiliary liquid guiding groove and a second auxiliary liquid guiding groove are arranged on the inner side of the second end cover, the first auxiliary liquid guiding groove is arranged opposite to the first liquid guiding groove, and the second auxiliary liquid guiding groove is arranged opposite to the second liquid guiding groove.

8. The gear pump of claim 7, wherein the first secondary fluid conducting channel is the same shape as the first fluid conducting channel, and the second secondary fluid conducting channel is the same shape as the second fluid conducting channel.

9. The gear pump of claim 1, wherein the second end cap is integral with a housing of the drive motor.

10. Gear pump according to claim 1, characterized in that the gear pump has a spatial axial direction, the gear pump has a length L1 along the axial direction of the gear pump, the pump body has a length L2, and the ratio L1: l2 ═ 1: (0.2 to 0.5);

the axial length of the gear pump is 10cm-20 cm.