CN214118732U - Combined labyrinth seal bearing - Google Patents

Abstract

The utility model provides a modular labyrinth seal bearing, includes bearing inner race and bearing inner race, outside bearing inner race was located to the bearing inner race cover, bearing inner race with be provided with the holder between the bearing inner race, circumference array had a plurality of rolling elements on the holder, still includes sealed apron, at least one first ring channel has been seted up to the both sides of the surface of bearing inner race, and at least one second ring channel has been seted up to the both sides of the surface of bearing inner race, be provided with on the sealed apron with first ring channel joint complex first bulge loop, be provided with on the sealed apron with second ring channel joint complex second bulge loop. The sealing device has the effect that the bearing inner ring can still be in a better sealing environment between the bearing inner ring and the bearing outer ring in the rotating process.

Description

Combined labyrinth seal bearing

Technical Field

The application relates to the field of bearing sealing technology, in particular to a combined labyrinth seal bearing.

Background

A bearing is a mechanical element that limits relative motion to a desired range of motion and reduces friction between moving parts, and therefore plays a crucial role in contemporary mechanical devices. In order to prevent the bearing from being influenced in the service life by the seepage of lubricating oil in the bearing or the entrance of external silt into the bearing in the use process, the joint between the bearing inner ring and the bearing outer ring is sealed by the sealing ring.

In the related art, patent document No. CN210889727U discloses a sealed bearing, which includes a bearing inner ring, a bearing outer ring, a first sealed cover and a second sealed cover, the bearing outer ring is sleeved outside the bearing inner ring, a holder is provided between the bearing inner ring and the bearing outer ring, a plurality of rolling elements are uniformly arranged on the holder, an overlapping region is provided between an outer edge portion of the first sealed cover and an inner edge portion of the second sealed cover, a gap is provided between the first sealed cover and the second sealed cover at the overlapping region, a side surface of the first sealed cover and a side surface of the second sealed cover corresponding to the overlapping region are respectively provided with an annular groove, and balls are uniformly arranged in the annular groove.

In view of the above related technologies, the inventor believes that in the rotation process of the bearing inner ring, a gap may occur between the first sealing cover and the bearing inner ring or between the second sealing cover and the bearing outer ring, which results in poor sealing effect, so that dust enters the bearing to affect the rotation of the rolling body.

SUMMERY OF THE UTILITY MODEL

In order to enable the bearing inner ring to be still in a better sealing environment between the bearing inner ring and the bearing outer ring in the rotating process, the application provides a combined type labyrinth seal bearing.

The application provides a modular labyrinth seal bearing adopts following technical scheme:

the utility model provides a modular labyrinth seal bearing, includes bearing inner race and bearing inner race, outside the bearing inner race was located to the bearing inner race cover, the bearing inner race with be provided with the holder between the bearing inner race, the circumference array has a plurality of rolling elements on the holder, still includes sealed apron, at least one first ring channel has been seted up to the both sides of the surface of bearing inner race, at least one second ring channel has been seted up to the both sides of the surface of bearing inner race, be provided with on the sealed apron with first ring channel joint complex first bulge loop, be provided with on the sealed apron with second ring channel joint complex second bulge loop.

Through adopting above-mentioned technical scheme, first bulge loop and first ring channel joint cooperation and second bulge loop and the cooperation of second ring channel joint form labyrinth, make the space between bearing inner race and the bearing inner race be in a comparatively confined environment, have reduced the possibility that external dust can get into in the bearing, and then has reduced the dust and has got into the interior influence rotor pivoted possibility of rolling.

Optionally, a sealing ring is embedded between the bearing inner ring and the bearing outer ring.

Through adopting above-mentioned technical scheme, the dust that a small amount of entering in the bearing can be blockked by the sealing ring, reduces near the dust enters into the holder, causes the possibility of wearing and tearing to holder and rolling element, the effectual life who prolongs the bearing.

Optionally, a threaded hole is formed in the side wall of the bearing outer ring, a through hole aligned with the threaded hole is formed in the sealing cover plate, and a bolt penetrates through the through hole and is in threaded connection with the threaded hole.

Through adopting above-mentioned technical scheme, the bolt will seal the apron and fix on the bearing outer race, when needing to clear up the dust on the sealing ring in the bearing simultaneously, only need cancel the cooperation of bolt and screw hole, will seal the apron and take off alright clear up the dust on the sealing ring.

Optionally, the first convex ring is provided with a magnetic block, and a magnetic block groove into which the magnetic block is inserted is formed in the first annular groove.

Through adopting above-mentioned technical scheme, when the sealed apron of installation, need through-hole and screwed hole alignment to install, the setting up of magnetic path and magnetic path groove makes sealed apron carry out preliminary location installation relative to the bearing inner race, and the through-hole of being convenient for aligns with the screwed hole.

Optionally, a first semicircular groove is formed in the second convex ring, a second semicircular groove is formed in the second annular groove, the first semicircular groove and the second semicircular groove can be spliced to form an annular groove, and balls are arranged in the annular groove in a circumferential array mode.

By adopting the technical scheme, the ball is arranged so that the bearing inner ring does not slide relative to the sealing cover plate when rotating, so that the relative friction between the bearing inner ring and the sealing cover plate is greatly reduced, and the abrasion generated when the bearing inner ring and the sealing cover plate move relative to each other is reduced.

Optionally, the retainer includes a first circular ring plate and a second circular ring plate, a plurality of lugs are evenly arranged on the first circular ring plate in the circumferential direction, one end, far away from the first circular ring plate, of each lug is connected with an elastic sheet, and a fixing hole for the lugs to be inserted is formed in the second circular ring plate.

Through adopting above-mentioned technical scheme, the holder divide into the installation of the rolling element of being convenient for of first ring plate and second ring plate, inserts the in-process of fixed orifices at the lug, and the flexure strip can receive the power of fixed orifices opening part, and the flexure strip is to the shrink of lug direction, and after the flexure strip passed through the fixed orifices, the power that the flexure strip received disappeared, and the flexure strip resumes natural state and fixed orifices opening part joint to make first ring plate splice into the holder with the second ring plate.

Optionally, a plurality of arc-shaped grooves are uniformly formed in the first circular ring plate and the second circular ring plate.

Through adopting above-mentioned technical scheme, the installation of the rotor of being convenient for of setting up of arc recess, the rotor physical stamina is at the arc recess internal rotation simultaneously.

Optionally, a plurality of oil guiding holes are formed in the side wall of the arc-shaped groove.

Through adopting above-mentioned technical scheme for the surface of the rotor in the retainer can evenly be soaked with lubricating oil, does benefit to the rotor and rotates.

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

1. the sealing cover plate is respectively clamped and matched with the bearing inner ring and the bearing outer ring to form labyrinth seal, so that the sealing performance of the bearing is greatly improved, the condition that dust enters the bearing to damage the rolling body and the retainer is effectively prevented, and the service life of the bearing is further prolonged;

2. the elastic piece is arranged to facilitate the insertion, the splicing and the fixing of the first circular ring plate and the second circular ring plate;

3. the arrangement of the magnetic block and the magnetic block groove enables the sealing cover plate and the bearing outer ring to be preliminarily positioned, and the through hole is conveniently aligned with the threaded hole.

Drawings

FIG. 1 is a schematic structural view of a composite labyrinth seal bearing according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a composite labyrinth seal bearing in accordance with an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a bearing inner race and a bearing outer race of an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is an exploded view of the cage of an embodiment of the present application;

fig. 6 is an enlarged view of a portion B in fig. 5.

Description of reference numerals: 1. a bearing inner race; 2. a bearing outer race; 3. a rolling body; 4. a holder; 41. a first annular plate; 42. a second annular plate; 5. sealing the cover plate; 6. a first annular groove; 7. a second annular groove; 8. a first convex ring; 9. a second convex ring; 10. a seal ring; 11. a threaded hole; 12. a through hole; 13. a magnetic block; 14. a magnetic block groove; 15. a first semi-circular groove; 16. a second semi-circular groove; 17. a ball bearing; 18. a bump; 19. an elastic sheet; 20. a fixing hole; 21. an arc-shaped groove; 22. oil guide hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a combined labyrinth seal bearing. Referring to fig. 1, the combined labyrinth seal bearing includes a bearing inner ring 1 and a bearing outer ring 2, the bearing inner ring 1 and the bearing outer ring 2 are both circular rings, the inner diameter of the bearing outer ring 2 is greater than the outer diameter of the bearing inner ring 1, and the bearing inner ring 1 and the bearing outer ring 2 are concentrically arranged.

Referring to fig. 2, a retainer 4 is installed in the middle between the bearing outer ring 2 and the bearing inner ring 1, and rolling bodies 3 are uniformly arranged in the retainer 4. The sealing rings 10 are embedded in the positions of two sides of the retainer 4 between the bearing outer ring 2 and the bearing inner ring 1, one end of each sealing ring 10 is embedded in the end face of the bearing outer ring 2, the other end of each sealing ring is embedded in the end face of the bearing inner ring 1, and the sealing rings 10 prevent a small amount of dust entering the bearing from entering the retainer 4, so that the possibility that the retainer 4 and the rolling body 3 are abraded by the dust is reduced. Two sides of the end surface of the bearing outer ring 2 opposite to the bearing inner ring 1 are provided with at least one first annular groove 6, and two sides of the end surface of the bearing inner ring 1 opposite to the bearing outer ring 2 are provided with at least one second annular groove 7, in this embodiment, two first annular grooves 6 and two second annular grooves 7 are taken for explanation. The first annular groove 6 and the second annular groove 7 are arranged in a circle around the axis of the bearing inner ring 1, and the inner diameters of different annular grooves are different. And sealing cover plates 5 are arranged on two sides of the space between the bearing inner ring 1 and the bearing outer ring 2 to block the space on the two sides, so that the space between the bearing inner ring 1 and the bearing outer ring 2 forms a sealed space. The sealing cover plate 5 is provided with a first convex ring 8 which is matched with the first annular groove 6 in a clamping manner and a second convex ring 9 which is matched with the second annular groove 7 in a clamping manner, so that labyrinth seals are formed at the first annular groove 6 and the second annular groove 7. The labyrinth seal ensures the sealing performance in the bearing, reduces the possibility that external dust can enter the bearing, and effectively prevents the retainer 4 and the rolling body 3 from being abraded by the dust. The end face of the bearing outer ring 2 contacting with the sealing cover plate 5 is circumferentially provided with a plurality of threaded holes 11 at intervals, and the axis of each threaded hole 11 is perpendicular to the end face of the bearing outer ring 2 contacting with the sealing cover plate 5. The sealing cover plate 5 is provided with a through hole 12 aligned with the threaded hole 11, and a bolt penetrates through the through hole 12 to be in threaded connection with the threaded hole 11. The cooperation of bolt and screw hole 11 makes things convenient for sealed apron 5 to dismantle and the installation, when needs clear up the dust on the sealing ring 10, the cooperation of cancellation bolt and screw hole 11 is dismantled sealed apron 5 can. A plurality of first semicircular grooves 15 are formed in the end face, in contact with the second annular groove 7, of the second convex ring 9, and the first semicircular grooves 15 are circumferentially arranged around the axis of the bearing inner ring 1. The end face, which is in contact with the second convex ring 9, of the second annular groove 7 is provided with a second semi-annular groove 16 opposite to the first semi-annular groove 15, and the second semi-annular groove 16 is also arranged circumferentially around the axis of the bearing inner ring 1. First semicircle ring groove 15 and second semicircle ring groove 16 can splice into a ring groove, are provided with a plurality of balls 17 in the ring groove, and the setting up of ball 17 makes the frictional force greatly reduced between bearing inner race 1 and the sealed apron 5, and the wearing and tearing between bearing inner race 1 and the sealed apron 5 when making bearing inner race 1 rotate reduce.

Referring to fig. 3 and 4, a magnetic block 13 (see fig. 2) is disposed on an end surface of the first convex ring 8 (see fig. 2) contacting the first annular groove 6, and a magnetic block groove 14 into which the magnetic block 13 is inserted is formed in the first annular groove 6. The arrangement of the magnetic blocks 13 and the magnetic block grooves 14 enables the bearing outer ring 2 and the sealing cover plate 5 (see fig. 2) to be preliminarily positioned when being installed, and enables the through holes 12 (see fig. 2) to be aligned with the threaded holes 11.

Referring to fig. 5 and 6, the retainer 4 is formed by splicing a first circular plate 41 and a second circular plate 42, arc grooves 21 are circumferentially arranged on the end surfaces of the first circular plate 41 and the second circular plate 42, the bottom surfaces of the arc grooves 21 are arc surfaces and can be tightly attached to the surfaces of the rolling elements 3, and the rolling elements 3 can be placed in a space formed by splicing the arc grooves 21 on the first circular plate 41 and the arc grooves 21 on the second circular plate 42. A plurality of oil guide holes 22 are formed in the bottom surface of the arc-shaped groove 21, and when the balls 17 are placed in the arc-shaped groove 21 due to the arrangement of the oil guide holes 22, the outer surface of the rolling body 3 can be uniformly soaked with lubricating oil, so that the rolling body 3 can rotate more conveniently. The end face of the first circular plate 41 provided with the arc-shaped groove 21 is provided with a convex block 18 at a position without the arc-shaped groove 21, the convex block 18 is welded on the first circular plate 41, the convex block 18 is a cylinder, and the axis of the convex block 18 is perpendicular to the end face of the first circular plate 41. The side wall of the end part of the lug 18 far away from the first circular ring plate 41 is circumferentially connected with an elastic sheet 19, the elastic sheet 19 and the lug 18 are combined to form an umbrella shape, and the elastic sheet 19 is pressed at the end far away from the lug 18, so that the elastic sheet 19 can contract towards the lug 18. The second circular plate 42 is provided with a fixing hole 20 aligned with the bump 18, the cross section of the fixing hole 20 is circular, the inner diameter of the fixing hole 20 is slightly larger than the outer diameter of the bump 18, and the inner diameter of the fixing hole 20 is smaller than the outer diameter of the edge farthest from the bump 18 when the elastic sheet 19 is not compressed. Therefore, in the process that the lug 18 is spliced between the first circular ring plate 41 and the second circular ring plate 42 and inserted into the fixing hole 20, the elastic sheet 19 is subjected to the force at the opening of the fixing hole 20, the edge of the elastic sheet 19 is extruded to move towards the lug 18, the lug 18 can penetrate through the fixing hole 20, when the extrusion force exerted on the elastic sheet 19 after penetrating through the fixing hole 20 disappears, the elastic sheet 19 is restored to the natural state and clamped with the edge of the fixing hole 20, and the first circular ring plate 41 and the second circular ring plate 42 are fixed.

The installation process of the combined labyrinth seal bearing provided by the embodiment of the application is as follows:

1. the rolling bodies 3 are mounted on the first circular plate 41;

2. splicing the first circular plate 41 and the second circular plate 42 with a fixed block through the lug 18;

3. installing the retainer 4 and the balls 17 between the bearing inner ring 1 and the bearing outer ring 2;

4. embedding a sealing ring 10 between a bearing inner ring 1 and a bearing outer ring 2;

5. the ball 17 is arranged in the second semi-circular groove 16;

6. the sealing cover plate 5 is fixed on the bearing outer ring 2 through bolts.

The technical effect of the combined labyrinth seal bearing of the embodiment of the application is as follows: labyrinth seals are formed among the sealing cover plate 5, the bearing inner ring 1 and the bearing outer ring 2, the bearing is in a sealed environment, and the possibility of dust entering the bearing is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, 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 (8)

1. The utility model provides a modular labyrinth seal bearing, includes bearing inner race (1) and bearing inner race (2), bearing inner race (1) is located outward to bearing inner race (2) cover, bearing inner race (1) with be provided with holder (4) between bearing inner race (2), the circumference array has a plurality of rolling elements (3), its characterized in that on holder (4): still including sealed apron (5), at least one first ring channel (6) have been seted up to the both sides of the surface of bearing inner race (2), at least one second ring channel (7) have been seted up to the both sides of the surface of bearing inner race (1), be provided with on sealed apron (5) with first ring channel (6) joint complex first bulge loop (8), be provided with on sealed apron (5) with second ring channel (7) joint complex second bulge loop (9).

2. The combined labyrinth seal bearing according to claim 1, characterized in that: and a sealing ring (10) is embedded between the bearing inner ring (1) and the bearing outer ring (2).

3. The combined labyrinth seal bearing according to claim 1, characterized in that: the side wall of the bearing outer ring (2) is provided with a threaded hole (11), the sealing cover plate (5) is provided with a through hole (12) aligned with the threaded hole (11), and a bolt penetrates through the through hole (12) and is in threaded connection with the threaded hole (11).

4. The combined labyrinth seal bearing according to claim 1, characterized in that: the first convex ring (8) is provided with a magnetic block (13), and a magnetic block (13) groove for inserting the magnetic block (13) is formed in the first annular groove (6).

5. The combined labyrinth seal bearing according to claim 1, characterized in that: first semi-circular ring groove (15) have been seted up on second bulge loop (9), second semi-circular ring groove (16) have been seted up in second ring channel (7), first semi-circular ring groove (15) with second semi-circular ring groove (16) can splice into the circular ring groove, there are ball (17) in the circular ring groove internal peripheral array.

6. The combined labyrinth seal bearing according to claim 1, characterized in that: the retainer (4) comprises a first circular ring plate (41) and a second circular ring plate (42), a plurality of protruding blocks (18) are evenly arranged on the first circular ring plate (41) in the circumferential direction, one ends, far away from the first circular ring plate (41), of the protruding blocks (18) are connected with elastic pieces (19), and fixing holes (20) for the protruding blocks (18) to be connected in an inserting mode are formed in the second circular ring plate (42).

7. The combined labyrinth seal bearing according to claim 6, characterized in that: a plurality of arc-shaped grooves (21) are uniformly formed in the first circular plate (41) and the second circular plate (42).

8. The combined labyrinth seal bearing according to claim 7, characterized in that: the side wall of the arc-shaped groove (21) is provided with a plurality of oil guide holes (22).

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