CN219282430U

CN219282430U - Multistage telescopic magnetic fluid seal assembly

Info

Publication number: CN219282430U
Application number: CN202320091418.2U
Authority: CN
Inventors: 杨帆; 郑俭
Original assignee: Wuxi Ciqiang Vog Vacuum Equipment Co ltd
Current assignee: Wuxi Ciqiang Vog Vacuum Equipment Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-06-30
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses a multistage sleeve type magnetic fluid sealing assembly, which relates to the technical field of magnetic fluid sealing, and comprises a shaft sleeve and a sealing assembly, wherein a plurality of shaft sleeves are rotatably inserted with a movable shaft in the axial direction, the sealing assembly is arranged in the shaft sleeve and comprises two annular frames and two turntables, the two annular frames are fixed on the inner wall of the same stage sleeve of the shaft sleeve, the two turntables are fixedly sleeved on the outer wall of the movable shaft, rubber sealing rings distributed in an annular structure are fixedly arranged between the side walls of the two sides of the inside of an annular rolling groove, the turntables are rotatably clamped on the inner side of the annular frames, and the rubber sealing rings are rotatably attached to the inner side walls of the annular frames. The utility model relates to a multistage sleeve type magnetic fluid sealing assembly, wherein a rubber sealing ring is propped against the inner side wall of an annular frame and then is in a tensioning state, so that the power output of a moving shaft is not affected, the space between two annular frames of the same sealing assembly can be ensured to be a closed space for backflow of magnetic fluid, and the magnetic fluid loss caused by sealing failure is avoided.

Description

Multistage telescopic magnetic fluid seal assembly

Technical Field

The utility model relates to the technical field of magnetic fluid sealing, in particular to a multistage sleeve type magnetic fluid sealing assembly.

Background

The magnetic fluid is a novel functional material, has fluidity of liquid and magnetism of a solid magnetic material, is a stable colloidal liquid formed by mixing magnetic solid particles with the diameter of nanometer magnitude, a base carrier liquid and a surfactant, is commonly used in industry, one side of the magnetic fluid is positioned at the atmosphere side, the other side of the magnetic fluid stretches into a vacuum environment, and the magnetic fluid easily leaks in the flowing process due to inconsistent air pressure at two sides, so that normal operation of equipment cannot be ensured, and the actual use requirement cannot be met, so that the multi-stage sleeve type magnetic fluid sealing assembly is designed and produced so as to solve the problems.

Disclosure of Invention

The utility model aims to provide a multistage sleeve type magnetic fluid sealing assembly, which solves the problems in the background technology.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a multistage telescopic magnetic fluid seal assembly, includes axle sleeve and seal assembly, the axle sleeve is multistage sleeve, and the axle sleeve rotates the grafting in axial direction has the moving axle, the inside bearing that cup joints with the moving axle rotation that rotates of axle sleeve tip embeds, the moving axle tip passes through the ring flange and is connected with external power equipment output shaft, and external power equipment provides power and drives the moving axle and rotate in the axle sleeve is inside, realizes power transmission.

The sealing component is provided with a plurality of sealing components which are all arranged in the shaft sleeve.

The sealing assembly comprises two annular frames and two turntables, the two annular frames are fixed on the inner wall of the same-stage sleeve of the shaft sleeve, the two turntables are fixedly sleeved on the outer wall of the moving shaft, an annular rolling groove is formed in the radial outer wall of the turntables, rubber sealing rings distributed in an annular structure are fixedly arranged between the side walls of the two sides inside the annular rolling groove, the turntables are rotationally clamped on the inner sides of the annular frames, the rubber sealing rings are rotationally attached to the inner side walls of the annular frames, the rubber sealing rings are in a tensioning state after being supported by the inner side walls of the annular frames, the space between the two annular frames of the same sealing assembly is ensured to be used for backflow of magnetic fluid, and permanent magnets directly opposite to the sealing space are embedded in the moving shaft.

In further embodiments, the annular roller ring is embedded in the inner side rotation of the annular frame, and the side wall of the annular roller ring is in rotary fit with the outer wall of the rubber sealing ring, so that the friction force generated when the annular frame and the rotary table rotate relatively can be reduced, the service life of the rubber sealing ring is prolonged, the rubber sealing ring is prevented from being worn and even cracked due to the long-term rotation of the annular frame, and the rubber sealing ring cannot play a sealing role.

In a further embodiment, a buffer gap is arranged between the radial side wall of the inner part of the annular roller groove and the side wall of the rubber sealing ring.

In a further embodiment, a plurality of arc stainless steel spring plates located in the buffer gap are fixedly arranged on the side walls of the two sides of the inside of the annular roller groove, the end parts of the arc stainless steel spring plates are attached to the side walls of the rubber sealing rings, a plurality of arc stainless steel spring plates on the same side are evenly distributed at intervals in an annular structure, and the arc stainless steel spring plates are utilized to push up the rubber sealing rings to rotate and attach to the outer walls of the annular roller rings in real time, so that the sealing performance of the closed space is guaranteed.

In a further embodiment, the end portion of the shaft sleeve is fixedly provided with an annular limiting ring, an annular limiting groove is formed in the radial side wall of the inner portion of the annular limiting ring, an extension rod is fixedly arranged on the outer wall of the moving shaft, and the end portion of the extension rod extends to the inside of the annular limiting groove and is in rotation clamping connection with the inside of the annular limiting groove.

In a further embodiment, the end of the extension rod is rotatably embedded with a plurality of rolling balls.

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

the utility model relates to a multistage sleeve type magnetic fluid sealing assembly, wherein a rubber sealing ring is propped against the inner side wall of an annular frame and then is in a tensioning state, and in the rotating process of a movable shaft, the rubber sealing ring of a turntable and the annular frame relatively rotate, so that the power output of the movable shaft is not influenced, the space between the two annular frames of the same sealing assembly can be ensured to be a closed space for backflow of magnetic fluid, and the magnetic fluid loss caused by sealing failure is avoided.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

fig. 2 and 3 are schematic partial structures of embodiments of the present utility model.

In the figure: 1. a shaft sleeve; 2. an annular frame; 3. a turntable; 4. a bearing; 5. an annular limit ring; 6. an extension rod; 7. a moving shaft; 8. a permanent magnet; 9. an annular roller ring; 10. a rubber seal ring; 11. arc stainless steel spring plates; 12. a rolling ball.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Example 1

Referring to fig. 1-3, the present embodiment provides a multi-stage sleeve type magnetic fluid sealing assembly, which includes a sleeve 1 and a sealing assembly, wherein the sleeve 1 is a multi-stage sleeve, a shaft 7 is inserted in the axial direction of the sleeve 1 in a rotating manner, a bearing 4 which is sleeved with the shaft 7 in a rotating manner is embedded in the end part of the sleeve 1 in a rotating manner, the bearing 4 reduces the rotating friction force of the shaft 7, the end part of the shaft 7 is connected with an output shaft of an external power device through a flange, and the external power device provides power to drive the shaft 7 to rotate in the sleeve 1, so that power transmission is realized.

The sealing components are arranged in the shaft sleeve 1, and the sealing components are used for sealing the magnetic fluid, so that the magnetic fluid can be ensured to normally play a role.

The sealing assembly comprises two annular frames 2 and two turntables 3, the two annular frames 2 are fixed on the inner wall of the same-stage sleeve of the shaft sleeve 1, the two turntables 3 are fixedly sleeved on the outer wall of the movable shaft 7, annular rolling grooves are formed in the radial outer wall of the turntables 3, rubber sealing rings 10 distributed in an annular structure are fixedly arranged between the side walls of the two sides of the inner portion of each annular rolling groove, the turntables 3 are rotationally clamped on the inner side of the annular frame 2, the rubber sealing rings 10 are rotationally attached to the inner side walls of the annular frame 2, the rubber sealing rings 10 are in a tensioning state after being abutted against the inner side walls of the annular frame 2, the space between the two annular frames 2 of the same sealing assembly is ensured to be used for backflow of magnetic fluid, permanent magnets 8 which are located opposite to the sealing space are embedded in the movable shaft 7, the permanent magnets 8 are radial magnetizing permanent magnet rings, and the permanent magnets 8 are matched with magnetic fluid in the sealing space to generate magnetic force, and the actual use requirements of equipment are met.

The rubber sealing ring 10 is in a tensioning state after being propped against the inner side wall of the annular frame 2, and in the rotating process of the rotary shaft 7, the rubber sealing ring 10 of the rotary disc 3 and the annular frame 2 relatively rotate, so that the power output of the rotary shaft 7 is not affected, the space between the two annular frames 2 of the same sealing assembly can be ensured to be a closed space for refluxing magnetic fluid, the magnetic fluid loss caused by sealing failure is avoided, and the sealing assembly is simple and practical.

Example 2

Referring to fig. 1-3, a further improvement was made over example 1:

the inner side of the annular frame 2 rotates and is embedded with the annular roller ring 9, the side wall of the annular roller ring 9 is rotationally attached to the outer wall of the rubber sealing ring 10, the annular roller ring 9 is utilized to replace the annular frame 2 to rotationally attach to the outer wall of the rubber sealing ring 10, so that the friction force generated when the annular frame 2 and the turntable 3 relatively rotate can be reduced, the service life of the rubber sealing ring 10 is prolonged, the rubber sealing ring 10 is prevented from being worn and even cracked due to long-term rotation of the annular frame 2, and the rubber sealing ring 10 cannot play a sealing role.

The rubber sealing ring 10 is in a tensioning state after being propped against the inner side wall of the annular frame 2, and a buffer gap is arranged between the radial side wall of the inner part of the annular roller pressing groove and the side wall of the rubber sealing ring 10, so that the annular gap is used as a deformation buffer space generated when the rubber sealing ring 10 is tensioned.

The inside both sides lateral wall of annular roll-in groove is fixed to be equipped with a plurality of arc stainless steel spring pieces 11 that are located the buffer gap, and arc stainless steel spring piece 11 tip and the laminating of rubber seal 10 lateral wall, and a plurality of arc stainless steel spring pieces 11 of same side are annular structure evenly spaced, utilize arc stainless steel spring piece 11 to push up rubber seal 10 in real time and the outer wall rotation laminating of annular roller ring 9, guarantee enclosure space's leakproofness.

The end fixing of axle sleeve 1 is equipped with annular spacing collar 5, annular spacing groove has been seted up to annular spacing collar 5's inside radial lateral wall, the fixed extension pole 6 that is equipped with of outer wall of moving axle 7, the tip of extension pole 6 extends to annular spacing inslot portion, and rotate the joint with annular spacing inslot portion, when moving axle 7 rotates, utilize extension pole 6 tip and annular spacing inslot internal rotation joint, neither influence moving axle 7's rotation normal clear, can avoid moving along the axial direction again moving annular moving axle 7, lead to permanent magnet 8 and the magnetic fluid dislocation distribution in the enclosure space, lead to the magnetism of magnetic fluid to weaken.

The end part of the extension rod 6 is rotationally embedded with a plurality of rolling balls 12, and the friction force generated when the rolling balls 12 are rotationally attached to the inner wall of the annular limiting groove can be reduced.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a multistage telescopic magnetic fluid seal assembly, includes axle sleeve (1) and seal assembly, axle sleeve (1) are multistage sleeve, and axle sleeve (1) axial direction side rotates and peg graft there is moving axis (7), inside rotation of axle sleeve (1) tip is embedded has bearing (4) that cup joint with moving axis (7) rotation, moving axis (7) tip passes through ring flange and external power equipment output shaft, its characterized in that: the sealing assemblies are arranged in a plurality of shaft sleeves (1);

the sealing assembly comprises two annular frames (2) and two turntables (3), the two annular frames (2) are fixed on the inner wall of the same-stage sleeve of the shaft sleeve (1), the two turntables (3) are fixedly sleeved on the outer wall of the movable shaft (7), annular rolling grooves are formed in the radial outer wall of the turntables (3), rubber sealing rings (10) distributed in an annular structure are fixedly arranged between the side walls of the two sides inside the annular rolling grooves, the turntables (3) are rotationally clamped on the inner side of the annular frames (2), the rubber sealing rings (10) are rotationally attached to the inner side walls of the annular frames (2), the rubber sealing rings (10) are in a tensioning state after being abutted against by the inner side walls of the annular frames (2), the space between the two annular frames (2) of the same sealing assembly is ensured to be a closed space for backflow of magnetic fluid, and permanent magnets (8) which are directly opposite to the closed space are embedded in the movable shaft (7).

2. A multi-stage sleeve-type magnetic fluid seal assembly according to claim 1, wherein: the inner side of the annular frame (2) is rotationally embedded with an annular roller ring (9), and the side wall of the annular roller ring (9) is rotationally attached to the outer wall of the rubber sealing ring (10).

3. A multi-stage sleeve-type magnetic fluid seal assembly according to claim 1, wherein: and a buffer gap is arranged between the radial side wall inside the annular roller pressing groove and the side wall of the rubber sealing ring (10).

4. A multi-stage sleeve-type magnetic fluid seal assembly according to claim 3, wherein: the stainless steel spring plate is characterized in that a plurality of arc stainless steel spring plates (11) positioned in the buffer gap are fixedly arranged on the side walls of the two sides of the inside of the annular roller pressing groove, the end parts of the arc stainless steel spring plates (11) are attached to the side walls of the rubber sealing rings (10), and a plurality of arc stainless steel spring plates (11) on the same side are uniformly distributed at intervals in an annular structure.

5. A multi-stage sleeve-type magnetic fluid seal assembly according to claim 1, wherein: the end fixing of axle sleeve (1) is equipped with annular spacing collar (5), annular spacing groove has been seted up to the inside radial lateral wall of annular spacing collar (5), the outer wall of moving axis (7) is fixed to be equipped with extension rod (6), the tip of extension rod (6) extends to annular spacing inslot portion, and rotates the joint with annular spacing inslot portion.

6. A multi-stage sleeve-type magnetic fluid seal assembly according to claim 5, wherein: the end part of the extension rod (6) is rotationally embedded with a plurality of rolling balls (12).