CN219452495U

CN219452495U - Impeller assembly and shaft connecting structure and pump

Info

Publication number: CN219452495U
Application number: CN202223219776.1U
Authority: CN
Inventors: 韩元平; 凌宬
Original assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Current assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-08-01
Anticipated expiration: 2032-12-01

Abstract

The utility model relates to the technical field of pumps, and provides a connecting structure of an impeller assembly and a shaft and a pump, wherein the connecting structure of the impeller assembly and the shaft comprises the impeller assembly and the shaft, a central shaft hole is formed in the impeller assembly, and a first assembly shaft section and a second assembly shaft section are sequentially arranged at one end of the shaft from the end part of the shaft; one of the central shaft hole and the first assembly shaft section is provided with a groove, the other is correspondingly provided with a bulge, and the bulge is inserted into the groove and is in interference fit with the groove; the second assembly shaft section is in interference fit with the central shaft hole. In the connection structure of the impeller assembly and the shaft, when the impeller works in a severe environment, the impeller is easy to corrode, damage and the like and needs to be replaced and maintained, and the connection structure is convenient for disassembling and assembling the impeller. And the connecting structure reduces the connecting stress between the impeller and the shaft, and reduces the probability of damaging the connecting structure between the impeller and the shaft when the impeller is reversed.

Description

Impeller assembly and shaft connecting structure and pump

Technical Field

The utility model belongs to the technical field of pumps, and particularly relates to a connection structure of an impeller assembly and a shaft and a pump.

Background

The existing connection mode of the impeller and the shaft is characterized in that a flat groove is formed in the shaft end, the shaft end is in clearance fit with a mounting hole in the impeller, the shaft end penetrates through the mounting hole of the impeller, external threads are formed in the shaft end, and a nut is used for being in fastening connection with the shaft end. Or the shaft is in interference fit with a mounting hole arranged on the impeller. Because the impeller and the shaft structure are installed in the water pump for use, the working environment of the water pump is complex, under the two installation modes, after the former installation mode is disassembled and assembled again, the dynamic balance between the impeller and the shaft is destroyed, relative shaking easily occurs between the impeller and the shaft, and the abrasion of the impeller and the shaft is accelerated. In addition, the nut is connected with the shaft end, the stress of the threaded connection part of the nut and the shaft end is large, the reverse rotation is easy to damage the threads during disassembly or starting, meanwhile, the sealing difficulty of the threaded connection part is increased, the sealing effect of the threaded connection part is relatively poor, the maintenance is repeated, and the maintenance cost is increased.

The latter assembly mode, in order to satisfy axial and radial fixing, requires a large interference, which results in difficult assembly, difficult disassembly, and difficult maintenance or replacement work.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a connection structure of an impeller and a shaft, which is convenient for dismounting the impeller when the impeller is easy to corrode, damage and the like and needs replacement and maintenance when the impeller works in a severe environment. And the connecting structure reduces the connecting stress between the impeller and the shaft, and reduces the probability of damaging the connecting structure between the impeller and the shaft when the impeller is reversed.

The utility model further aims to provide the pump, by utilizing the connecting structure of the impeller and the shaft, when the pump works in a severe and complex environment, the pump is convenient to maintain when the impeller fails, the integral scrapping of the pump is avoided, and the use cost is reduced.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a connection structure of an impeller assembly and a shaft, which comprises the following components:

the impeller assembly is provided with a central shaft hole, and one end of the shaft is provided with a first assembly shaft section and a second assembly shaft section sequentially from the end part;

one of the central shaft hole and the first assembly shaft section is provided with a groove, the other is correspondingly provided with a protrusion, and the protrusion is inserted into the groove and is in interference fit with the groove;

the second assembly shaft section is in interference fit with the central shaft hole.

Preferably, at least one threaded hole is formed in the impeller assembly corresponding to the second assembly shaft section, a threaded piece is installed in the threaded hole, and the end portion of the threaded piece abuts against the outer wall of the second assembly shaft section.

Preferably, the impeller assembly comprises: the impeller and the central insert are arranged on the impeller, the central shaft hole is formed in the central insert, and the central insert is made of metal;

at least one threaded hole is formed in the center insert corresponding to the second assembly shaft section.

Preferably, the number of the threaded holes is at least three, and the three threaded holes are uniformly distributed along the circumferential direction of the central insert.

Preferably, the protrusion is provided on an inner wall of the central shaft hole of the central insert, and a length of the protrusion extends in an axial direction of the central insert.

Preferably, the impeller is injection molded integrally with the center insert.

The utility model also provides a pump, which comprises the connecting structure of the impeller assembly and the shaft.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, after the impeller assembly and the shaft are assembled, the impeller assembly and the shaft are jointly installed in the pump, the central shaft hole and the first assembly shaft section of the shaft are in interference fit through the convex insertion groove, and when the shaft rotates and transmits torque, the impeller assembly cannot rotate relatively, so that the torque can be transmitted more stably.

In addition, the second assembly shaft section is in interference fit with the central shaft hole, the second assembly shaft section is a smooth shaft surface, and the second assembly shaft section is in interference fit with the central shaft hole so as to increase the sealing between the second assembly shaft section and the central shaft hole.

The first assembly shaft section is in interference fit with the central shaft hole in an inserting mode through the protrusions and the grooves, the second assembly shaft section is in interference fit with the central shaft hole, after assembly, and when working under the same working conditions, the structure reduces interference of interference assembly, is easy to detach and assemble, and dynamic balance of the impeller assembly and the shaft after assembly cannot be damaged.

And after the impeller assembly is assembled with the shaft, the impeller assembly can be used as a module for design, manufacture and use, and the efficiency in mass production is improved.

Drawings

FIG. 1 is a schematic view of the structure of the connection structure of the impeller assembly and the shaft in the present utility model;

FIG. 2 is a schematic view of the connection structure of the impeller assembly and the shaft of the present utility model (excluding the screw);

FIG. 3 is a schematic view of the A-A structure of FIG. 2 according to the present utility model;

FIG. 4 is a schematic view of a first angle configuration of the center insert piece of the present utility model;

FIG. 5 is a schematic view of a second angle configuration of the center insert piece of the present utility model;

FIG. 6 is a schematic view of the structure of the shaft of the present utility model;

fig. 7 is a top view of the shaft of the present utility model.

The impeller comprises a blade wheel assembly, a motor and a motor, wherein 1 is an impeller assembly; 11. an impeller; 12. a center insert; 13. a protrusion; 120. a threaded hole; 121. an annular cylinder; 122. an annular portion; 2. a shaft; 20. a groove; 21. a first assembly shaft section; 22. a second assembly shaft section; 3. a screw.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 7, in this embodiment, there is provided a connection structure of an impeller assembly and a shaft, specifically, the connection structure includes an impeller assembly 1 and a shaft 2, wherein a central shaft hole is provided on the impeller assembly 1, and one end of the shaft 2 is provided with a first assembly shaft section 21 and a second assembly shaft section 22 sequentially from the end. One of the central shaft hole and the first assembly shaft section 21 is provided with a groove 20, and the other is correspondingly provided with a protrusion 13, and the protrusion 13 is inserted into the groove 20 and is in interference fit with the groove 20. The second mounting shaft section 22 is an interference fit with the central shaft bore.

In this embodiment, after the impeller assembly 1 and the shaft 2 are assembled, they are mounted inside the pump together, the central shaft hole and the first assembly shaft section 21 of the shaft 2 are in interference fit with each other by inserting the protrusion 13 into the groove 20, and when the shaft 2 rotates and transmits torque, it will not rotate relative to the impeller assembly 1, so that the torque can be transmitted more stably.

In addition, the second mounting shaft section 22 is in interference fit with the central shaft bore, the second mounting shaft section 22 being a smooth shaft face, and in interference fit with the central shaft bore to increase the seal therebetween.

The first assembly shaft section 21 and the central shaft hole are in interference fit through the insertion connection mode of the protrusion 13 and the groove 20, the second assembly shaft section 22 and the central shaft hole are in interference fit, after assembly, when working under the same working condition, the interference of interference assembly is reduced, disassembly and assembly are easier, and dynamic balance of the impeller assembly 1 and the shaft 2 after assembly can not be damaged.

And after the impeller assembly 1 and the shaft 2 are assembled, the impeller assembly can be used as a module for design, manufacture and use, and the efficiency in mass production is improved.

Preferably, at least one threaded hole 120 is arranged on the impeller assembly 1 corresponding to the second assembling shaft section 22, a threaded piece 3 is installed in the threaded hole 120, and the end part of the threaded piece 3 abuts against the outer wall of the second assembling shaft section 22.

At the corresponding position of the second assembling shaft section 22, the impeller assembly 1 is provided with a threaded hole 120, the outer wall of the second assembling shaft section 22 is tightly propped against the end part of the threaded piece 3 through installing the threaded piece 3 so as to further fasten the shaft 2 and the impeller assembly 1, and meanwhile, the interference of the interference fit of the second assembling shaft section 22 and the central shaft hole can be reduced due to the arrangement of the threaded piece 3.

Preferably, for the specific structure of the impeller assembly 1, the impeller assembly 1 comprises an impeller 11 and a central insert 12, the impeller 11 and the central insert 12 are integrally injection molded, the central insert 12 is arranged on the impeller 11, and a central shaft hole is arranged on the central insert 12. At least one threaded bore 120 is provided in the center insert 12 corresponding to the second mounting shaft section 22. The center insert piece 12 is made of metal, has high wear resistance and strength, and increases the service life of the impeller assembly 1 and the structural strength of the connection with the shaft 2 through the center insert piece 12. In addition, the center insert 12 is provided with a threaded hole 120, so that the structure strength is high, and the screw 3 is convenient to connect with the center insert.

Specifically, the center insert 12 includes an annular cylinder 121 and an annular portion 122 disposed on the annular cylinder 121, the annular portion 122 is embedded into the impeller 11, and the strength of connection between the center insert 12 and the impeller 11 is increased after injection molding through the annular portion 122, so that the shaft 2 or the impeller 11 cannot be separated when being subjected to axial force.

More specifically, the center insert 12 is made of copper or iron.

Further specifically, the first fitting shaft section 21 and the second fitting shaft section 22 opened on the above-described shaft 2 can be adjacent, and can also be spaced apart by a preset distance.

Preferably, the inner wall of the central shaft hole of the central insert 12 is provided with a protrusion 13, the length of the protrusion 13 extends along the axial direction of the central insert 12 to form straight teeth so as to be inserted into the corresponding groove 20 and in interference fit with the groove 20, the straight teeth are in inserted interference fit with the groove 20, and then the threaded piece 3 is matched to tightly press the shaft 2, so that the connection strength of the shaft 2 and the central insert 12 is met, and the interference of interference fit of the shaft 2 and the central insert 12 is reduced.

Preferably, the threaded holes 120 are at least three, and the three threaded holes 120 are uniformly distributed along the circumference of the center insert 12. A threaded hole 120 is provided between two adjacent protrusions 13, and a screw 3 is installed in the threaded hole 120 to press against the smooth outer wall of the shaft 2 between the two protrusions 13.

The material of the shaft 2 in this embodiment is ceramic or metal, the interference between the first assembly shaft section and the central shaft hole, the interference between the second assembly shaft section and the central shaft hole, and the size of the groove are determined by the material of the shaft 2, the diameter of the shaft 2, the number of grooves of the shaft 2, the size of the transmitted torque, and other factors.

There is also provided in this embodiment a pump including a connection structure of an impeller assembly and a shaft. The pump utilizes the connection structure of the impeller assembly 1 and the shaft 2, and when the pump works under severe environmental conditions, and when the impeller 11 breaks down, the pump is convenient to maintain, the service performance cannot be affected by reassembling after maintenance, the integral rejection of the pump cannot be caused, and the adaptation cost is reduced.

Preferably, the pump is a canned motor pump or a mechanical pump.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A connection structure of an impeller assembly and a shaft, comprising:

the impeller comprises an impeller assembly (1) and a shaft (2), wherein a central shaft hole is formed in the impeller assembly (1), and a first assembly shaft section (21) and a second assembly shaft section (22) are sequentially arranged at one end of the shaft (2) from the end part;

one of the central shaft hole and the first assembly shaft section (21) is provided with a groove (20), the other is correspondingly provided with a protrusion (13), and the protrusion (13) is inserted into the groove (20) and is in interference fit with the groove (20);

the second assembly shaft section (22) is in interference fit with the central shaft bore.

2. The impeller assembly and shaft connecting structure according to claim 1, wherein at least one threaded hole (120) is formed in the impeller assembly (1) corresponding to the second assembling shaft section (22), a threaded piece (3) is installed in the threaded hole (120), and the end portion of the threaded piece (3) abuts against the outer wall of the second assembling shaft section (22).

3. The impeller assembly and shaft connection according to claim 2, characterized in that the impeller assembly (1) comprises: the impeller comprises an impeller (11) and a central insert (12), wherein the central insert (12) is arranged on the impeller (11), the central shaft hole is formed in the central insert (12), and the central insert (12) is made of metal;

at least one threaded hole (120) is formed in the center insert (12) corresponding to the second assembly shaft section (22).

4. A connection structure of an impeller assembly and a shaft according to claim 3, characterized in that the number of threaded holes (120) is at least three, and that three threaded holes (120) are uniformly distributed along the circumference of the center insert (12).

5. A connection structure of an impeller assembly and a shaft according to claim 3, characterized in that the protrusion (13) is provided on an inner wall of the central shaft hole of the central insert (12), and that the length of the protrusion (13) extends in the axial direction of the central insert (12).

6. A connection structure of an impeller assembly and a shaft according to claim 3, characterized in that the impeller (11) is injection molded integrally with the central insert (12).

7. Pump, characterized by comprising a connection of the impeller assembly (1) and the shaft (2) according to any one of claims 1-6.