CN217029702U

CN217029702U - Shaft-hole closed type connecting structure

Info

Publication number: CN217029702U
Application number: CN202220938630.3U
Authority: CN
Inventors: 梁士城
Original assignee: Suzhou Aonaite Silicon Carbide Ceramic Technology Co ltd
Current assignee: Suzhou Aonaite Silicon Carbide Ceramic Technology Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-07-22
Anticipated expiration: 2032-04-21

Abstract

The application relates to the technical field of shaft and hole assembly, in particular to a shaft-hole closed type connecting structure, which comprises a main shaft, a rotating body and a metal framework, wherein the rotating body is provided with a connecting hole, one end face of the rotating body is sealed with the connecting hole, the metal framework is fixedly arranged in the connecting hole, and the metal framework is provided with a threaded hole; one end part of the main shaft is in threaded connection with the metal framework. The application has the effects of simple processing and assembly and stronger corrosion resistance.

Description

Shaft-hole closed type connecting structure

Technical Field

The application relates to the technical field of shaft hole connection assembly, in particular to a shaft-hole closed type connecting structure.

Background

The shaft-hole connection is one of the most widely used assembly structures in mechanical structure, and usually, the shaft-hole connection is mostly in a key connection or key pin connection mode, that is, a through hole is formed in a rotating body, and then the shaft passes through the through hole and forms the key connection or key pin connection.

However, this connection structure has some significant problems: since the shaft is inserted through the through hole, a sealing cover is generally provided between the end of the shaft and the through hole after the shaft is inserted through the through hole, in order to seal the connection portion of the shaft and the hole.

When the structure is used under some severe working conditions, for example, in the use occasions of a part of axial-flow pumps, the impeller and the shaft are soaked in chemical liquid with certain corrosiveness, the sealing cover usually needs to be made of a material with better corrosion resistance, on one hand, the cost is higher, and on the other hand, the corrosion-resistant material is not well processed due to the material characteristics, so that the sealing cover and the rotating body are troublesome in mechanical connection or welding.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a shaft-hole closed type connecting structure which has the advantages of convenience in processing and assembly, simple structure and better sealing performance.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the shaft-hole closed type connecting structure comprises a main shaft and a rotating body, wherein a connecting hole is formed in the rotating body, one end face of the rotating body is closed to the connecting hole, the shaft-hole closed type connecting structure also comprises a metal framework fixedly arranged in the connecting hole, and a threaded hole is formed in the metal framework; one end part of the main shaft is connected in the metal framework through threads.

The technical scheme is realized, the connecting hole for connecting the main shaft does not penetrate through the rotating body, one end part of the main shaft is absolutely isolated from the outside in a use state, and an end cover seal is not required to be additionally arranged, so that the problem of sealing one end part of the main shaft is fundamentally solved, the main shaft is in threaded connection in the rotating body, the assembly is simple and convenient, and the defect that the main shaft can only rotate towards one direction is overcome. In addition, because the sealing performance is guaranteed, the rotating body is made of a material with strong corrosion resistance, the process of directly processing the threaded hole in the material is troublesome, and then a metal framework is arranged, so that the processing and the assembly are convenient, and the cost is reduced.

In one preferred embodiment of the present invention, the rotating body is made of silicon carbide ceramic and is integrally molded.

By adopting the technical scheme, the silicon carbide ceramic has stronger corrosion resistance, and the integrated processing and forming also makes the processing more convenient.

As one of the preferred scheme of this application, metal framework's lateral wall is equipped with the keyway, the axis of keyway parallel connection hole, the keyway is equipped with a plurality ofly along metal framework's circumference, the inside wall protrusion of connecting hole is equipped with a plurality of key bodies with the keyway assembly.

According to the technical scheme, the connection relation of the metal framework and the rotating body is provided, the key connection of the key groove and the key body is utilized, the processing and the assembly are convenient, and the cost is reduced.

As one of preferable aspects of the present application, the key groove is provided as a dovetail groove.

According to the technical scheme, the key body and the key groove can be clamped, the clamping binding force is formed in the direction perpendicular to the axis, the fastening performance of connection between the metal framework and the rotating body is effectively improved, and the stability in the using process is guaranteed.

As one preferable aspect of the present application, one closed end of the rotating body is tapered.

By adopting the technical scheme, when the rotating body rotates, the conical end face can effectively reduce the erosion of corrosive liquid to the end face of the rotating body in unit time, thereby reducing the erosion to the rotating body,

as one of the preferred scheme of this application, main shaft lateral wall cover is equipped with the axle sleeve, be equipped with on the rotator to joining in marriage the groove, axle sleeve bottom joint is to joining in marriage the inslot, the axle sleeve is to the vertical circumference side of joining in marriage the groove seted up the first seal groove of annular form respectively along circumference, two interference card has embedded first sealed pad in the first seal groove, receive during the assembly of axle sleeve top along the axial of main shaft and towards the extrusion force completion of rotator fixed.

According to the technical scheme, the shaft sleeve and the rotating body are sealed through the first sealing gasket, so that the phenomenon that liquid enters the connecting hole or the metal framework to corrode is avoided, and the sealing performance between the main shaft and the rotating body is further improved.

As one of them preferred scheme of this application, the diameter to joining in marriage the groove is greater than metal skeleton's external diameter, annular second seal groove has been seted up respectively to the bottom surface of axle sleeve and to the bottom surface to joining in marriage the groove, the second seal groove is coaxial with the connecting hole, the interference is equipped with the second and seals the pad in the second seal groove.

By the technical scheme, the second sealing structure is formed between the shaft sleeve and the rotating body, so that corrosion of one end of the main shaft and external liquid is further avoided, and the corrosion resistance is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. one end part of the rotating body is set to be closed, the metal framework is arranged in the rotating body, the internal thread is arranged in the metal framework, the main shaft thread is assembled in the metal framework, and a sealing cover is not required to be arranged at the end part of the main shaft, so that the processing and the assembly are simple, and the sealing performance is good;

2. through setting up first sealed pad and second sealed pad, realize that the one end that the main shaft exposes is sealed better with external environment, improves corrosion protection.

Drawings

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

FIG. 1 is a general schematic view of a shaft-bore connection;

FIG. 2 is a sectional view mainly used for embodying an assembly structure of components;

fig. 3 is an exploded view mainly for showing the connection relationship of the metal frames.

Reference numerals: 1. a main shaft; 2. a rotating body; 21. connecting holes; 3. a metal skeleton; 31. a threaded hole; 41. a keyway; 42. a key body; 5. a shaft sleeve; 6. matching the grooves; 71. a first seal groove; 72. a first gasket; 81. a second seal groove; 82. a second gasket; 9. an impeller.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

Referring to fig. 1 and 2, a shaft-hole closed type connecting structure is disclosed in an embodiment of the present application. The impeller-free rotary machine comprises a rotary body 2 and a main shaft 1, wherein an impeller 9 is fixedly arranged on the outer side wall of the rotary body 2, the rotary body 2 is cylindrical, one end of the rotary body 2 is closed, and the other end of the rotary body 2 is provided with a connecting hole 21; still including the fixed metal framework 3 that sets up in connecting hole 21, open threaded hole 31 along self axial on metal framework 3, there is the external screw thread bottom lateral wall of

main shaft

1, and 1 threaded assembly of main shaft is connected in metal framework 3. The end of the main shaft 1 does not penetrate through the rotating body 2, so that a sealing cover does not need to be detached and arranged independently, the end of the main shaft 1 is not in contact with the outside, corrosion is avoided, and processing and installation are convenient. The closed end of the rotating body 2 is formed into a conical shape, so that the end surface is less washed away by liquid, and corrosion is reduced. The rotary body 2 is made of a silicon carbide ceramic material and is integrally molded, and has high corrosion resistance, and can be made of other metal or nonmetal materials with high corrosion resistance.

Referring to fig. 1 and 2, a shaft sleeve 5 is further sleeved on the outer side wall of the main shaft 1, a matching groove 6 for clamping the shaft sleeve 5 is formed in the rotating body 2, the diameter of the matching groove 6 is larger than the outer diameter of the metal framework 3, annular first sealing grooves 71 are respectively formed in the vertical circumferential side surfaces of the shaft sleeve 5 and the matching groove 6 along the circumferential direction of the shaft sleeve 5 and the matching groove 6, the two first sealing grooves 71 are located on the same horizontal line, and first sealing gaskets 72 are embedded in the two first sealing grooves 71 in an interference clamping manner, so that a first sealing structure between the main shaft 1 and the rotating body 2 is formed; annular second seal grooves 81 are respectively formed in the bottom surface of the shaft sleeve 5 and the bottom surface of the matching groove 6, the second seal grooves 81 are coaxial with the connecting holes 21, second sealing gaskets 82 are arranged in the two second seal grooves 81 in an interference mode, and the top end of the shaft sleeve 5 is fixed by extrusion force towards the rotating body 2 along the axial direction of the main shaft 1 during assembly, so that a second sealing structure is completed. The first and

second gaskets

72 and 82 effectively improve the sealability between the main shaft 1 and the rotating body 2, thereby improving corrosion resistance.

Referring to fig. 2 and 3, in order to ensure the stability of connection between the metal skeleton 3 and the rotating body 2 and the convenience of assembly, a plurality of key grooves 41 are formed on the outer side wall of the metal skeleton 3, the key grooves 41 are parallel to the axis of the connecting hole 21, the key grooves 41 are formed along the circumferential direction of the metal skeleton 3, a plurality of key bodies 42 assembled with the key grooves 41 are protruded on the inner side wall of the connecting hole 21, and the key grooves 41 are formed as dovetail grooves. When the installation, firstly, the bonding colloid is coated in the key groove 41, and then the metal framework 3 is clamped in the connecting hole 21, so that the key groove 41 is matched with the key body 42, the fixation can be completed within a period of time, and the assembly is simple and convenient.

The implementation principle of the shaft-hole closed type connecting structure in the embodiment of the application is as follows: the connecting hole 21 for connecting the main shaft 1 does not penetrate through the rotating body 2, one end part of the main shaft 1 is absolutely isolated from the outside in a use state, and an end cover seal is not needed to be arranged additionally, so that the problem of sealing one end part of the main shaft 1 is fundamentally solved, the main shaft 1 is in threaded connection in the rotating body 2, the assembly is simple and convenient, and the defect is that the main shaft 1 can only rotate towards one direction. In addition, because the sealing performance is ensured, the material adopted by the rotating body 2 must be a material with strong corrosion resistance, the direct processing of the threaded hole 31 in the material is troublesome, and the metal framework 3 is arranged, so that the processing and the assembly are convenient, and the cost is reduced.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a closed connection structure in axle-hole, includes main shaft (1) and rotator (2), it has connecting hole (21), its characterized in that to open on rotator (2): the sealing structure is characterized in that a space between one end face of the rotating body (2) and the connecting hole (21) is sealed, the sealing structure further comprises a metal framework (3) fixedly arranged in the connecting hole (21), and a threaded hole (31) is formed in the metal framework (3); one end part of the main shaft (1) is in threaded connection with the metal framework (3).

2. The shaft-hole closed-type connecting structure according to claim 1, wherein: the rotating body (2) is made of silicon carbide ceramic and is integrally formed.

3. The shaft-hole closed-type connecting structure according to claim 2, wherein: the lateral wall of metal framework (3) is equipped with keyway (41), the axis of keyway (41) parallel connection hole (21), keyway (41) are equipped with a plurality ofly along the circumference of metal framework (3), the inside wall protrusion of connection hole (21) is equipped with a plurality of key bodies (42) of assembling with keyway (41).

4. The shaft-hole closed-type connecting structure according to claim 3, wherein: the key groove (41) is a dovetail groove.

5. The shaft-hole closed-type connecting structure according to claim 1, wherein: the closed end of the rotating body (2) is conical.

6. The shaft-hole closed-type connecting structure according to claim 1, wherein: main shaft (1) lateral wall cover is equipped with axle sleeve (5), be equipped with on rotator (2) to joining in marriage groove (6), axle sleeve (5) bottom joint is in joining in marriage groove (6), axle sleeve (5) and to joining in marriage the vertical circumference side of groove (6) and offer first seal groove (71) of annular form respectively along circumference, two interference card has been inlayed in first seal groove (71) and is sealed fill up (72), receive during the assembly on axle sleeve (5) top along the axial of main shaft (1) and towards the extrusion force completion of rotator (2) fixed.

7. The shaft-hole closed-type connecting structure according to claim 6, wherein: the diameter to joining in marriage groove (6) is greater than the external diameter of metal skeleton (3), annular second seal groove (81) have been seted up respectively to the bottom surface of axle sleeve (5) and to the bottom surface to joining in marriage groove (6), second seal groove (81) are coaxial with connecting hole (21), the interference is equipped with second sealed pad (82) in second seal groove (81).