CN217176951U

CN217176951U - Coupler structure

Info

Publication number: CN217176951U
Application number: CN202220054779.5U
Authority: CN
Inventors: 赵志鹏; 胡杰; 魏丁飞; 莫巧平; 蒋伟; 韩鑫
Original assignee: Zhejiang Shimge Pump Co Ltd
Current assignee: Zhejiang Shimge Pump Co Ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-08-12
Anticipated expiration: 2032-01-10

Abstract

The utility model relates to a shaft coupling structure solves the shaft coupling structure that prior art exists and makes the cracked problem of pump shaft easily, the technical scheme of adoption: including the base member, set up rotor shaft hole and pump shaft hole in the base member, rotor shaft hole and pump shaft hole coaxial line set up, its characterized in that the base member is the stainless steel cylinder, the one end of base member forms rotor shaft hole, the other end of base member forms the embedding hole, it establishes the stainless steel nestification to inlay in the embedding hole, the shaft hole in the stainless steel nestification does pump shaft hole. The method has the following effects: the shaft coupling structure comprises a shaft coupling structure body, wherein an embedding hole is formed in the shaft coupling structure body, a stainless steel nesting sleeve is embedded in the embedding hole, a pump shaft hole is formed in the stainless steel nesting sleeve, and in the using process, the stainless steel nesting sleeve can play a role in buffering a running pump shaft and reduce the rigid contact force, so that the stress concentration on the pump shaft is reduced, the possibility of breakage of the pump shaft is reduced, and the service life of the pump shaft is prolonged.

Description

Coupler structure

Technical Field

The utility model relates to a shaft coupling structure especially relates to a shaft coupling structure suitable for multistage pump.

Background

The pump shaft is the important part of multistage pump torsion transmission, is an important ring in the water pump, and generally, the pump shaft is mostly hexagonal to the side structure in the water pump. The coupling structure is used for coupling the pump shaft and the rotor shaft and transmitting torque.

The failure of the pump shaft is mainly represented as fracture failure, and the fracture position of the pump shaft is simulated through finite element analysis software. It can be known that the stress concentration on the pump shaft is located at the end face of the coupling structure, i.e. the position where the pump shaft is prone to fracture.

The main influence factors of the pump shaft breakage include the length of the pump shaft, the eccentric value of the pump shaft, the material of the pump shaft and the thickness of the pump shaft. Through finite element analysis software, the following conclusion can be obtained for the above influence factor analysis under the same material: 1. the stress at the short fracture of the pump shaft is relatively small; 2. the stress at the fracture part with small pump shaft eccentricity value is relatively small; 3. the thicker the pump shaft, the less stress at the break. Comparing these analysis results, it can be known that: the eccentricity has the greatest effect on the breakage of the pump shaft.

Disclosure of Invention

An object of the utility model is to solve the above-mentioned problem that prior art exists and provide a shaft coupling structure, set up the embedding hole in shaft coupling structure's base member, it is nested to inlay in the embedding hole and establish the stainless steel, forms the pump shaft hole in the stainless steel is nested, in the use, the stainless steel is nested can play the cushioning effect to moving pump shaft, reduces the rigidity contact force to reduce the epaxial stress concentration of pump, reduce the cracked possibility of pump shaft, be favorable to promoting pump shaft life.

The above technical purpose of the present invention is mainly solved by the following technical solutions: the utility model provides a coupler structure, includes the base member, sets up rotor shaft hole and pump shaft hole in the base member, rotor shaft hole and pump shaft hole coaxial line set up, its characterized in that the base member is the stainless steel cylinder, the one end of base member forms rotor shaft hole, the other end of base member forms the embedding hole, it is nested to inlay to establish the stainless steel in the embedding hole, the shaft hole in the stainless steel is nested does pump shaft hole. The shaft coupling structure comprises a shaft coupling structure body, wherein a base body of the shaft coupling structure body is provided with an embedding hole, a stainless steel nesting sleeve is embedded in the embedding hole, and a pump shaft hole is formed in the stainless steel nesting sleeve. In the use, the stainless steel nesting can play the cushioning effect to the pump shaft of operation, reduces the rigidity contact force to reduce the epaxial stress concentration of pump, reduce the cracked possibility of pump shaft, be favorable to promoting pump shaft life.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure:

the stainless steel nest comprises a sleeve portion and an embedded ring portion which are of an integral structure, the embedded ring portion is located at one end of the sleeve portion, and the outer diameter of the embedded ring portion is larger than the diameter of a circle circumscribed by the sleeve portion. When the pump shaft is embedded into the base body, the embedded ring part is matched with the end face of the base body, the thickness of the stainless steel nesting at the end face of the base body is increased, the strength of bearing the pump shaft is enhanced, and the service life of the pump shaft and the stainless steel nesting is prolonged.

In order to avoid shaking or circumferential sliding (or rotation) of the pump shaft, the sleeve part is of a hexagonal prism cylindrical structure. Generally, the pump shaft is in a hexagonal opposite-side structure, and the inner wall of the sleeve part can be attached to the outer wall of the pump shaft.

In order to avoid shaking or circumferential sliding (or rotation) of the pump shaft, the outer wall of the embedded ring part is cylindrical, and the inner wall of the embedded ring part is hexagonal prism-shaped. The inner wall of the ring embedding part can be attached to the outer wall of the pump shaft.

The inner wall of the ring-embedded part and the inner wall of the sleeve part are corresponding parts of the same hexagonal prism shape. Namely, the inner hole of the embedded ring part and the inner hole of the sleeve part are coaxial inner holes, and the cross section of the inner hole of the embedded ring part is the same as that of the inner hole of the sleeve part.

The end part of the stainless steel embedded sleeve, which is far away from the embedded ring part, is provided with an inward-folding ring, the inner end of the base body, which corresponds to the embedded hole, is provided with a second step structure, the inward-folding ring is supported on the second step structure, and the middle part of the inward-folding ring is provided with a hole.

The embedded hole comprises an inner embedded hole part and an outer embedded hole part, the inner embedded hole part is matched with the outer wall of the sleeve part, the depth of the inner embedded hole part is matched with the length of the sleeve part, the outer embedded hole part is matched with the embedded ring part, and the depth of the outer embedded hole part is matched with the length of the embedded ring part.

And the rotor shaft hole is communicated with the embedding hole.

The bottom of the rotor shaft hole is an inverted frustum-shaped process hole, the bottom of the embedding hole is a cylindrical process hole, and the middle opening of the inward-folding ring is connected with the frustum-shaped process hole.

The diameter of the middle opening of the inward-folding ring is the same as that of the connecting end of the frustum-shaped process hole.

The inner wall of the rotor shaft hole is a spline type inner wall.

The utility model discloses beneficial effect who has: an embedding hole is formed in a base body of the coupling structure, a stainless steel nesting sleeve is embedded in the embedding hole, a pump shaft hole is formed in the stainless steel nesting sleeve, and the problem of eccentricity of a pump shaft during pump shaft connection is solved. In the use, the stainless steel nesting can play the cushioning effect to the pump shaft of operation, reduces the rigidity contact force to reduce the epaxial stress concentration of pump, reduce the cracked possibility of pump shaft, be favorable to promoting pump shaft life.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is a schematic view of a three-dimensional structure of the present invention.

Figure 3 is a schematic diagram of an explosive structure of the present invention,

fig. 4 is another schematic view of the structure of fig. 3.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): as shown in fig. 1-4, a coupler structure comprises a base body 1, a rotor shaft hole and a pump shaft hole which are arranged in the base body, wherein the rotor shaft hole and the pump shaft hole are coaxially arranged, the base body 1 is a stainless steel cylinder, one end of the base body 1 forms the rotor shaft hole 11, the other end of the base body forms an embedding hole 12, a stainless steel nesting sleeve 2 is embedded in the embedding hole 12, and the shaft hole in the stainless steel nesting sleeve is the pump shaft hole 21. The shaft coupling structure comprises a shaft coupling structure body, wherein a base body of the shaft coupling structure body is provided with an embedding hole, a stainless steel nesting sleeve is embedded in the embedding hole, and a pump shaft hole is formed in the stainless steel nesting sleeve. In the use, the stainless steel nestification can play the cushioning effect to the moving pump shaft, reduces the rigidity contact force to reduce the epaxial stress concentration of pump, reduce the cracked possibility of pump shaft, be favorable to promoting pump shaft life.

Preferably, the stainless steel nest comprises a sleeve part 22 and an embedded ring part 23 which are of an integral structure, the embedded ring part 23 is positioned at one end of the sleeve part 23, and the outer diameter of the embedded ring part 23 is larger than the diameter of a circle which is tangent to the outer part 2 of the sleeve part. When the stainless steel nesting 2 is embedded into the base body 1, the embedding ring part 23 is matched with the end face of the base body 1, the thickness of the stainless steel nesting at the end face of the base body is increased, the strength of bearing the pump shaft is enhanced, the possibility of breakage of the pump shaft is reduced, and the service life of the pump shaft and the stainless steel nesting is prolonged.

To avoid wobbling or circumferential sliding (or rotation) of the pump shaft, the sleeve portion 22 has a hexagonal cylindrical structure. Generally, the pump shaft is in a hexagonal opposite-side structure, and the inner wall of the sleeve part can be attached to the outer wall of the pump shaft.

In order to avoid the shaking or circumferential sliding (or rotation) of the pump shaft, the outer wall of the ring embedding part 23 is cylindrical, and the inner wall of the ring embedding part is hexagonal prism-shaped. The inner wall of the ring embedding part can be attached to the outer wall of the pump shaft. The outer wall of the embedded ring part 23 is cylindrical, so that the circular ring part can be processed at the corresponding part on the base body, the processing procedure and the difficulty can be simplified, the precision requirement can be met, and the assembly is convenient. The ring-inserting part 23 protrudes out of the sleeve part 22, a corresponding step structure 12-1 is formed by inserting and inserting holes in the base body, and the ring-inserting part 23 is connected with the step structure 12-1.

The inner wall of the collar portion 23 and the inner wall of the sleeve portion 23 are corresponding portions of the same hexagonal prism shape. Namely, the inner hole of the embedded ring part and the inner hole of the sleeve part are coaxial inner holes, and the cross section of the inner hole of the embedded ring part is the same as that of the inner hole of the sleeve part.

In order to increase the strength of the stainless steel nesting 2, an inner folding ring 24 is arranged at the end part of the stainless steel nesting 2, which is far away from the embedding ring part 23, a second step structure 13 is arranged at the inner end of the base body, which corresponds to the embedding hole 12, the inner folding ring 24 is arranged on the second step structure 13, and a hole 24-1 is formed in the middle part of the inner folding ring 24.

The insert hole 12 includes an inner insert hole portion and an outer insert hole portion, the inner insert hole portion is matched with the outer wall of the sleeve portion 22, the depth of the inner insert hole portion is matched with the length of the sleeve portion 22, the outer insert hole portion is matched with the insert ring portion 23, and the depth of the outer insert hole portion is matched with the length of the insert ring portion 23.

The rotor shaft hole 11 communicates with the insertion hole 12.

The bottom of the rotor shaft hole 11 is an inverted frustum-shaped process hole 11-1, the middle opening 24-1 of the inward-folded ring 24 is a cylindrical process hole, and the middle opening 24-1 of the inward-folded ring 24 is connected with the frustum-shaped process hole 11-1.

The diameter of the middle opening hole 24-1 of the inward folding ring is the same as that of the connecting end of the frustum-shaped process hole 11-1.

Typically, the end of the rotor shaft is a splined end and the inner wall of the rotor shaft bore 11 is a splined inner wall.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. In the above embodiments, the present invention may be variously modified and changed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a coupler structure, includes the base member, sets up rotor shaft hole and pump shaft hole in the base member, rotor shaft hole and pump shaft hole coaxial line set up, its characterized in that the base member is the stainless steel cylinder, the one end of base member forms rotor shaft hole, the other end of base member forms the embedding hole, it is nested to inlay to establish the stainless steel in the embedding hole, the shaft hole in the stainless steel is nested does pump shaft hole.

2. A coupling construction according to claim 1, wherein the stainless steel nest comprises a sleeve portion and an insert ring portion of unitary construction, the insert ring portion being located at one end of the sleeve portion, the insert ring portion having an outer diameter greater than the diameter of the circumcircle of the sleeve portion.

3. A coupling structure according to claim 2, wherein the sleeve portion has a hexagonal cylindrical structure, the collar portion has a cylindrical outer wall and a hexagonal cylindrical inner wall.

4. A coupling structure according to claim 3, wherein the inner wall of the collar portion and the inner wall of the sleeve portion are respective portions of the same hexagonal prism shape.

5. The coupling structure of claim 4, wherein the stainless steel insert is provided with an inward-folded ring at the end part facing away from the insert ring part, the base body is provided with a second step structure corresponding to the inner end of the insert hole, the inward-folded ring is supported on the second step structure, and the middle part of the inward-folded ring is provided with a hole.

6. A coupling structure according to any one of claims 2 to 5, wherein the insert bore comprises an inner insert bore portion and an outer insert bore portion, the inner insert bore portion engaging the outer wall of the sleeve portion, the inner insert bore portion having a depth matching the length of the sleeve portion, the outer insert bore portion engaging the insert ring portion, the outer insert bore portion having a depth matching the length of the insert ring portion.

7. A coupling structure according to claim 6, wherein said rotor shaft hole communicates with the insert hole.

8. The coupling structure according to claim 7, wherein the bottom of the rotor shaft hole is an inverted frustum-shaped process hole, the bottom of the embedding hole is a cylindrical process hole, and a middle opening of the inner folded ring on the stainless steel nest is connected with the frustum-shaped process hole.

9. A coupling structure according to claim 8, wherein the diameter of the central opening of the invaginated ring is the same as the diameter of the connecting end of the frustum-shaped fabrication hole.

10. A coupling construction according to claim 6, wherein the inner wall of the rotor shaft bore is a splined inner wall.