CN212337919U

CN212337919U - Structure for improving bearing assembly protection grade

Info

Publication number: CN212337919U
Application number: CN202021728505.7U
Authority: CN
Inventors: 张学斌; 张赓; 李斌
Original assignee: Nanyang Explosion Proof Suzhou Special Equipment Co ltd
Current assignee: Nanyang Explosion Proof Suzhou Special Equipment Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-01-12
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a structure for improving bearing assembly protection level, which relates to the bearing field, and the technical scheme is characterized in that the structure comprises a main shaft, wherein the main shaft is provided with a bearing and a sealing ring, and the end part of the bearing is provided with an outer end cover matched with the sealing ring; a plurality of radial joint surfaces are arranged between the sealing ring and the outer end cover, and at least one conical joint surface is arranged in the plurality of radial joint surfaces; the conical joint surface, namely the radial gap, is arranged in a descending manner along the axial direction, and the bearing is positioned on the side with the smaller radial gap. The utility model discloses a non-contact is sealed, has adopted the circular cone composition face on this basis to can follow the axial and produce the energy power, prevent external granule, dust and water etc. and improve the protection level of bearing assembly in getting into the bearing, improve the bearing life-span, improve equipment's security and reliability.

Description

Structure for improving bearing assembly protection grade

Technical Field

The utility model relates to a bearing field, more specifically say, it relates to a structure of improvement bearing assembly protection level.

Background

In rotating machines, bearings are often chosen as supports for the rotating elements. The protection level of bearing assembly is very important, and if the protection level of bearing assembly is low, solid particles, dust, water and the like are easy to enter the bearing, so that the safe and reliable operation of the bearing is influenced.

The existing bearing sealing structure comprises a contact type seal and a non-contact type seal, wherein the contact type seal comprises various mechanical seals, the sealing effect is good, but the mechanical loss is large, the heat is generated, the efficiency and the reliability of equipment can be influenced, and the sealing effect becomes poor after the abrasion; non-contact seals include labyrinth seals, but the sealing effect is general.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an improve structure of bearing assembly protection level, it belongs to non-contact seal, but can improve sealed effect.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a structure for improving the assembly protection level of a bearing comprises a main shaft, wherein the main shaft is provided with the bearing and a sealing ring, and the end part of the bearing is provided with an outer end cover matched with the sealing ring; a plurality of radial joint surfaces are arranged between the sealing ring and the outer end cover, and at least one conical joint surface is arranged in the plurality of radial joint surfaces;

the conical joint surface, namely the radial gap, is arranged in a descending manner along the axial direction, and the bearing is positioned on the side with the smaller radial gap.

Further, the axial length of the conical joint surface is more than or equal to 1 mm.

Furthermore, the radial clearance of the conical joint surface is 0.1 mm-5 mm.

Further, the relative conical angle of the conical joint surface is 0.1-22.5 degrees.

Further, the conical joint surface comprises a conical surface arranged on the sealing ring and a cylindrical surface arranged on the outer end cover and opposite to the conical surface.

Further, the conical joint surface comprises a conical surface arranged on the outer end cover and a cylindrical surface arranged on the sealing ring and opposite to the conical surface.

Further, the conical joint surface comprises conical surfaces respectively arranged on the sealing ring and the outer end cover, and the two conical surfaces are oppositely arranged.

Further, the sealing ring and the outer end cover are of a labyrinth seal, namely at least two radial joint surfaces are included between the sealing ring and the outer end cover.

Furthermore, three radial joint surfaces are arranged between the sealing ring and the outer end cover, namely the cross section of a sealing curved path between the sealing ring and the outer end cover is S-shaped; after the S-shaped sealing curved path is unfolded to be linear, the bearing is positioned on one side with a smaller radial gap.

Further, all three radial joint surfaces are the conical joint surfaces.

To sum up, the utility model discloses following beneficial effect has:

1. the utility model adopts non-contact sealing, does not generate mechanical loss and heat during application, does not lose efficacy due to abrasion, and has constant implementation effect;

2. the conical joint surface is adopted, so that the dynamic force can be generated along the axial direction, outside particles, dust, water and the like are prevented from entering the bearing, the protection grade of bearing assembly is improved, the service life of the bearing is prolonged, and the safety and the reliability of equipment are improved.

Drawings

FIG. 1 is a schematic diagram of a structure for improving the protection grade of bearing assembly in an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic size diagram of a conical joint in an embodiment.

In the figure: 1. a main shaft; 2. a bearing; 3. an outer end cover; 4. a seal ring; 41. a first conical surface; 42. a second conical surface; 43. a third conical surface; 5. an inner end cap.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

a structure for improving the assembly protection level of a bearing refers to FIG. 1, and comprises a main shaft 1, wherein a bearing 2 and a sealing ring 4 are arranged on the main shaft 1; the two ends of the bearing 2 are respectively provided with an outer end cover 3 and an inner end cover 5, wherein the outer end cover 3 is matched with a sealing ring 4 for sealing, and external particles, dust, water and the like are prevented from entering the bearing 2.

Referring to fig. 1 and 2, a plurality of radial joint surfaces are arranged between the sealing ring 4 and the outer end cover 3, and at least one conical joint surface is included in the plurality of radial joint surfaces; the conical joint surface, namely the radial clearance, is arranged in a descending manner along the axial direction, and the bearing 2 is positioned at the side with the smaller radial clearance; in the rotation process of the main shaft 1 and the sealing ring 4, the pressure intensity at the small part of the radial gap is larger than the pressure intensity at the large part of the radial gap, and a pressure difference is formed along the axial direction, so that the energy power pointing to the large end of the radial gap from the small end of the radial gap is formed in the conical joint surface, and external particles, dust, water and the like are prevented from entering the bearing 2, wherein the blocking effect on the dust and water vapor is better.

Referring to fig. 1 and 2, the conical joint surface includes two forms, one is that a conical surface is opposite to a cylindrical surface, and the other is that two conical surfaces are opposite; in the embodiment, three radial joint surfaces are arranged between the sealing ring 4 and the outer end cover 3, namely the section of a sealing curved path between the sealing ring and the outer end cover is S-shaped, and the three radial joint surfaces are conical joint surfaces; after the S-shaped sealing curved path is unfolded to be linear, the bearing 2 is positioned on one side with a smaller radial gap; in this embodiment, the conical surfaces are all disposed on the sealing ring 4, the sealing ring 4 is respectively provided with a first conical surface 41, a second conical surface 42 and a third conical surface 43 from inside to outside along the radial direction, and the side walls of the outer end cover 3 opposite to the three conical surfaces are all cylindrical surfaces.

Referring to fig. 1 to 3, the protection effect of the conical joint surface is related to a plurality of parameters, including the rotation speed of the main shaft 1, the relative conical angle θ of the conical joint surface (i.e. the included angle between the conical surface and the cylindrical surface, or the included angle between two conical surfaces), the axial length L1 of the conical joint surface, and the radial gap L2 of the conical joint surface; preferably, the axial length L1 of the conical joint surface is more than or equal to 1mm, the radial clearance L2 of the conical joint surface is 0.1 mm-5 mm (diameter difference), and the relative conical angle theta of the conical joint surface is 0.1-22.5 degrees.

Claims

1. The utility model provides an improve structure of bearing assembly protection level which characterized in that: the sealing device comprises a main shaft, wherein a bearing and a sealing ring are arranged on the main shaft, and an outer end cover matched with the sealing ring is arranged at the end part of the bearing; a plurality of radial joint surfaces are arranged between the sealing ring and the outer end cover, and at least one conical joint surface is arranged in the plurality of radial joint surfaces;

2. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the axial length of the conical joint surface is more than or equal to 1 mm.

3. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the radial clearance of the conical joint surface is 0.1 mm-5 mm.

4. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the relative conical angle of the conical joint surface is 0.1-22.5 degrees.

5. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the conical joint surface comprises a conical surface arranged on the sealing ring and a cylindrical surface arranged on the outer end cover and opposite to the conical surface.

6. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the conical joint surface comprises a conical surface arranged on the outer end cover and a cylindrical surface arranged on the sealing ring and opposite to the conical surface.

7. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the conical joint surface comprises conical surfaces which are respectively arranged on the sealing ring and the outer end cover, and the two conical surfaces are oppositely arranged.

8. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the sealing ring and the outer end cover are of a curved path sealing, namely at least two radial joint surfaces are included between the sealing ring and the outer end cover.

9. The structure for improving the protection level of bearing assembly according to claim 1, wherein: the sealing ring and the outer end cover comprise three radial joint surfaces, namely the section of a sealing curved path between the sealing ring and the outer end cover is S-shaped; after the S-shaped sealing curved path is unfolded to be linear, the bearing is positioned on one side with a smaller radial gap.

10. The structure for improving the protection level of bearing assembly according to claim 9, wherein: the three radial joint surfaces are all the conical joint surfaces.