CN219911751U - Labyrinth seal structure and rotating device - Google Patents

Abstract

The utility model relates to a labyrinth seal structure and a rotating device, wherein the labyrinth seal structure seal ring comprises an outer seal ring and an inner seal ring, and the inner seal ring and the outer seal ring are arranged at intervals along the axial direction of the inner seal ring and are positioned at the inner side of the outer seal ring; wherein, the inboard ring of outer sealing ring is equipped with a plurality of outer archs, and a plurality of outer archs are used for stretching into in the rotation passageway, and one side that the inner sealing ring is close to outer sealing ring is encircled and is equipped with a plurality of interior archs, and a plurality of interior archs are arranged in proper order along its radial with a plurality of outer archs to be the interval setting, and each interior arch sets up along its axial interval with outer sealing ring, each outer arch sets up along its axial interval with interior sealing ring. This scheme can effectively avoid the bearing box to take place the seepage, improves the leakproofness, and reduces the rotation resistance, avoids simultaneously taking up the space of bearing box in its axial, improves bearing box inner wall space utilization to can set up bearing supporting point as much as possible, and then the life of extension bearing box.

Description

Labyrinth seal structure and rotating device

Technical Field

The utility model relates to the technical field of sealing structures, in particular to a labyrinth sealing structure and a rotating device.

Background

The bearing box sealing is an effective measure for avoiding leakage between the rotating shaft and the shaft box on the premise that a proper gap exists between the rotating shaft and the shaft hole of the bearing box. Traditional pivot is sealed only through monolithic sealing washer and sealing grease, and this kind of sealed mode is great to the resistance that produces of pivot. In order to reduce the resistance of the sealing structure to the rotating shaft, a labyrinth sealing mechanism is generally adopted at present. For example, patent CN 103671933A discloses a labyrinth seal mechanism, which realizes a labyrinth seal path by two groups of mutually intersecting protruding pieces, and adds sealing grease between the gaps of the protruding pieces, and the protruding pieces are not contacted, so that friction resistance is reduced.

Generally, the more bearing support points in the axial direction in the bearing housing, the less load is required to be carried by each bearing contact point, so as to prolong the service life of the bearing housing. However, the protruding sheets in the prior art are arranged at intervals along the axial direction of the bearing box, so that the space of the bearing box in the axial direction is occupied, and a plurality of supporting points are not beneficial to being arranged in the bearing box.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a labyrinth seal structure and a rotating device, so as to solve the technical problem that in the prior art, the protruding sheets of the labyrinth seal structure are arranged along the axial direction of the bearing box at intervals, which occupies the space of the bearing box in the axial direction and is not beneficial to arranging a plurality of supporting points in the bearing box.

The utility model provides a labyrinth seal structure, which comprises a rotating device, wherein the rotating device comprises a stator, the stator is provided with a rotating channel for a rotor to rotate and penetrate, and the labyrinth seal structure comprises:

the sealing ring comprises an outer sealing ring and an inner sealing ring which are sleeved on the periphery of the rotor, the outer sealing ring is used for being fixed on the rotor and located outside the rotating channel, and the inner sealing ring and the outer sealing ring are axially arranged at intervals and located on the inner side of the outer sealing ring and used for being fixed on the stator and located in the rotating channel;

the inner side ring of the outer sealing ring is provided with a plurality of outer bulges, the outer bulges are used for extending into the rotating channel, one side of the inner sealing ring, which is close to the outer sealing ring, is provided with a plurality of inner bulges, the inner bulges and the outer bulges are sequentially and alternately distributed along the radial direction of the inner bulges and are arranged at intervals, the inner bulges and the outer sealing ring are arranged at intervals along the axial direction of the inner bulges, and the outer bulges and the inner sealing ring are arranged at intervals along the axial direction of the inner sealing ring.

Optionally, the periphery of the inner sealing ring is convexly provided with an extension part towards the outer sealing ring, one end of the extension part, which is far away from the inner sealing ring, is used for extending out of the rotating channel and is outwards bent along the radial direction of the inner sealing ring to form a bending part, and one side of the bending part, which faces towards the inner sealing ring, is provided with an auxiliary sealing structure.

Optionally, the bending part is provided with a clamping protrusion towards the inner sealing ring, and the clamping protrusion is used for being clamped in a clamping groove arranged on the outer wall of the stator.

Optionally, the inner seal ring is configured to be in interference fit with the rotor, and each inner protrusion is provided with a stop portion along a radial outward convex direction of the inner protrusion, each outer protrusion is provided with a limit portion along a radial inward convex direction of the inner protrusion, and the limit portion is located on an inner side of an adjacent stop portion, wherein at least one of the stop portion and the limit portion is in an annular arrangement for limiting the outer protrusion to be separated from the rotation channel along an axial direction of the outer protrusion.

Optionally, the limiting portion and the stopping portion are disposed at intervals along the axial direction of the inner sealing ring.

Optionally, the stop portion and the corresponding outer protrusion are disposed at intervals along a radial direction thereof; and/or the number of the groups of groups,

the limiting parts and the corresponding inner protrusions are arranged at intervals along the radial direction of the inner protrusions.

Optionally, a plurality of first protrusions are annularly arranged on one side, facing the inner sealing ring, of the bending part, and the first protrusions are sequentially and alternately arranged with a plurality of second protrusions annularly arranged on the outer wall of the stator along the radial direction of the bending part at intervals so as to form a labyrinth sealing channel between the bending part and the outer wall of the stator;

wherein a plurality of the first protrusions constitute the auxiliary sealing structure.

Optionally, an abutment portion is disposed on a periphery of the bending portion and extends toward the inner seal ring, and the abutment portion is configured to abut against an outer wall of the stator.

In addition, the utility model also provides a rotating device, which comprises:

the labyrinth seal structure as recited in any one of the preceding claims; the method comprises the steps of,

the stator is provided with a rotating channel which is used for the rotor to rotate and penetrate through;

the outer sealing ring and the inner sealing ring are arranged on the periphery of the rotor in a surrounding mode, the outer sealing ring is fixed to the rotor and located outside the rotating channel, the inner sealing ring is fixed to the stator and located in the rotating channel, and a plurality of outer protrusions extend into the rotating channel.

Optionally, the stator is a bearing box, the rotation channel is formed in the bearing box, a bearing for the rotor to penetrate is arranged in the rotation channel, and the bearing is located at one side of the inner sealing ring away from the outer sealing ring.

Compared with the prior art, in the labyrinth sealing structure provided by the utility model, the outer sealing ring is fixed on the rotor (the rotating shaft), and the inner sealing ring is fixed on the stator (the bearing box), so that the rotating shaft drives the outer sealing ring to rotate relative to the inner sealing ring in the working process. In the relative rotation process of the two, a sealing channel is formed between the outer bulge and the inner bulge, so that the possibility of leakage between the outer wall of the rotating shaft and the inner wall of the rotating channel is reduced; the outer bulge is not connected with the inner sealing ring structure, the inner bulge is not connected with the outer sealing ring structure, and the rotation resistance of the rotating shaft is reduced; meanwhile, as the outer sealing ring is fixed relative to the rotating shaft, the probability of leakage of the outer wall of the rotating shaft is reduced; and the inner sealing ring is fixed with the bearing box, so that the leakage probability of the inner wall of the self-rotation channel is reduced. Therefore, leakage of the bearing box can be effectively avoided, and the sealing performance is improved. In addition, because outer protruding and interior protruding radial interval setting along outer sealing ring all, avoid taking bearing box in its axial ascending space, improve bearing box inner wall space utilization to can set up bearing supporting point as much as possible, and then extension bearing box's life.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and its details set forth in the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is an exploded view of one embodiment of a labyrinth seal structure provided by the present utility model;

FIG. 2 is an exploded view of the labyrinth seal structure of FIG. 1 at another angle;

FIG. 3 is a schematic cross-sectional view of the labyrinth seal structure of FIG. 1;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is an enlarged schematic view at B in FIG. 3;

FIG. 6 is a schematic structural diagram of an embodiment of a rotating device according to the present utility model;

FIG. 7 is a schematic cross-sectional view of the rotation device of FIG. 6;

FIG. 8 is an enlarged schematic view of FIG. 7 at C;

FIG. 9 is a schematic view of the rotary device of FIG. 6 without showing a labyrinth seal structure;

fig. 10 is an enlarged schematic view at D in fig. 9.

Description of the reference numerals

100-labyrinth seal structure, 1-sealing ring, 11-outer sealing ring, 12-inner sealing ring, 13-outer bulge, 131-limit part, 14-inner bulge, 141-limit part, 15-extension part, 16-bending part, 161-clamping bulge, 17-auxiliary seal structure, 171-first bulge, 18-abutting part, 200-rotating device, 210-stator, 210 a-rotating channel, 210 b-clamping groove, 211-bearing box, 212-second bulge, 220-rotor, 221-rotating shaft and 230-bearing.

Detailed Description

The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 8, the labyrinth seal structure 100 is used for a rotating device 200, the rotating device 200 includes a stator 210, the stator 210 is provided with a rotating channel 210a through which a rotor 220 rotates, the labyrinth seal structure 100 includes a seal ring 1, the seal ring 1 includes an outer seal ring 11 and an inner seal ring 12 which are sleeved on the periphery of the rotor 220, the outer seal ring 11 is used for being fixed on the rotor 220 and is located outside the rotating channel 210a, and the inner seal ring 12 and the outer seal ring 11 are arranged at intervals along the axial direction thereof and are located inside the outer seal ring 11 and are used for being fixed on the stator 210 and are located inside the rotating channel 210 a; wherein, the inner side of the outer sealing ring 11 is annularly provided with a plurality of outer bulges 13, the plurality of outer bulges 13 are used for extending into the rotating channel 210a, one side of the inner sealing ring 12 close to the outer sealing ring 11 is annularly provided with a plurality of inner bulges 14, the plurality of inner bulges 14 and the plurality of outer bulges 13 are alternately distributed along the radial direction of the inner sealing ring and are arranged at intervals, and each inner bulge 14 and the outer sealing ring 11 are arranged at intervals along the axial direction of the inner sealing ring, and each outer bulge 13 and each inner sealing ring 12 are arranged at intervals along the axial direction of the inner sealing ring.

In the labyrinth seal structure 100 provided by the present utility model, the outer seal ring 11 is fixed to the rotor 220 (in this embodiment, the rotating shaft 221), and the inner seal ring 12 is fixed to the stator 210 (in this embodiment, the bearing housing 211), so that in the working process, the rotating shaft 221 drives the outer seal ring 11 to rotate relative to the inner seal ring 12. In the process of relative rotation of the two, a sealing channel is formed between the outer bulge 13 and the inner bulge 14, so that the possibility of leakage between the outer wall of the rotating shaft 221 and the inner wall of the rotating channel 210a is reduced; the outer bulge 13 is not in structure with the inner sealing ring 12, the inner bulge 14 is not in structure with the outer sealing ring 11, and the rotation resistance of the rotating shaft 221 is reduced; meanwhile, since the outer sealing ring 11 is fixed relative to the rotating shaft 221, the probability of leakage of the outer wall of the rotating shaft 221 is reduced; and the inner sealing ring 12 is fixed with the bearing housing 211, so that the probability of leakage from the inner wall of the rotating channel 210a is reduced. Thus, leakage of the bearing housing 211 can be effectively prevented, and the sealing performance can be improved. In addition, because the outer bulge 13 and the inner bulge 14 are arranged along the radial interval of the outer sealing ring 11, the occupation of the space of the bearing box 211 in the axial direction is avoided, the space utilization rate of the inner wall of the bearing box 211 is improved, the bearing 230 supporting points can be arranged as many as possible, and the service life of the bearing box 211 is prolonged.

It should be appreciated that at least the inner side of the outer seal ring 11 is fitted to the outer wall of the rotating shaft 221 to avoid leakage at the outer wall of the rotating shaft 221; and at least the outer side of the inner seal ring 12 is attached to the inner wall of the rotating passage 210a to avoid leakage from the inner wall of the rotating passage 210a. Specifically, in the present embodiment, the inner sides of the outer seal ring 11 and the inner seal ring 12 are both attached to the outer wall of the rotating shaft 221, and only the outer side of the inner seal ring 12 is attached to the inner wall of the rotating channel 210a, so that the outer seal ring 11 is driven to rotate synchronously and rotate relative to the inner seal ring 12 when the rotating shaft 221 rotates.

Further, referring to fig. 3 and 4, an extension portion 15 is protruding from the periphery of the inner seal ring 12 towards the outer seal ring 11, one end of the extension portion 15 away from the inner seal ring 12 is configured to extend out of the rotation channel 210a, and is bent outwards along the radial direction of the inner seal ring 12 to form a bent portion 16, and an auxiliary seal structure 17 is disposed on a side of the bent portion 16 towards the inner seal ring 12. In the present embodiment, by providing the sub-seal structure 17 between the bent portion 16 and the outer wall of the bearing housing 211, the possibility of occurrence of leakage between the inner walls of the rotation passage 210a is further reduced.

Further, referring to fig. 8 to 10, the bending portion 16 is provided with a locking protrusion 161 protruding toward the inner sealing ring 12, and the locking protrusion 161 is configured to be locked in a locking groove 210b provided on an outer wall of the stator 210. In this embodiment, the fixing of the inner seal ring 12 on the bearing housing 211 is achieved by the arrangement of the clamping protrusion 161 and the clamping groove 210b, so that the operation is simple and convenient. It should be understood that in this embodiment, the inner seal ring 12, the outer seal ring 11, the clip protrusion 161, the outer protrusion 13 and the inner protrusion 14 are made of flexible materials, including but not limited to rubber, silicone rubber, etc. In the present embodiment, a plurality of locking projections 161 are provided at intervals along the circumferential direction of the bending portion 16, and a plurality of corresponding locking grooves 210b are provided in the bearing housing 211.

Specifically, the inner seal ring 12 is configured to be in interference fit with the rotor 220, and each inner protrusion 14 is provided with a stop portion 141 protruding outward in a radial direction thereof, each outer protrusion 13 is provided with a limit portion 131 protruding inward in a radial direction thereof, and the limit portion 131 is located at an inner side of an adjacent stop portion 141, wherein at least one of the stop portion 141 and the limit portion is configured in an annular shape for limiting the outer protrusion 13 from being separated from the rotation channel 210a in an axial direction thereof. Thus, in the present embodiment, the inner diameter of the inner sealing ring 12 is slightly smaller than the outer diameter of the rotating shaft 221, so as to fix the inner sealing ring 12 to the outer periphery of the rotating shaft 221, which is simple and convenient to operate and saves cost. Meanwhile, in order to prevent the outer protrusion 13 from being separated from the rotating channel 210a, the outer protrusion 13 can be stably placed in the rotating channel 210a to be matched with the inner protrusion 14 by the limit fit between the limit parts 131 and the limit parts 141.

In one embodiment, one of the limiting portion 131 and the blocking portion 141 is disposed in a ring shape, and the other is disposed in a plurality of portions along the circumferential direction of the seal ring 1. In the present embodiment, the limiting portion 131 and the stopping portion 141 are all annular for improving stability. And the limiting part 131 and the stopping part 141 are arranged along the axial direction of the inner sealing ring 12 at intervals, so that friction between the limiting part 131 and the stopping part 141 is avoided when the outer sealing ring 11 rotates relative to the outer sealing ring 11, and the rotating resistance of the rotating shaft 221 is reduced. Also, in order to reduce the rotation resistance of the rotation shaft 221, in the present embodiment, the stopper portion 141 is disposed at a distance from the corresponding outer protrusion 13 in the radial direction thereof; and/or, the limiting portion 131 is disposed at a radial interval from the corresponding inner protrusion 14.

Further, a plurality of first protrusions 171 are disposed around one side of the bending portion 16 facing the inner sealing ring 12, and the plurality of first protrusions 171 and a plurality of second protrusions 212 disposed around the outer wall of the stator 210 are alternately disposed along the radial direction of the bending portion 16 in turn and are disposed at intervals, so as to form a labyrinth seal channel between the bending portion 16 and the outer wall of the stator 210; the plurality of first projections 171 constitute the sub-seal 17. In the present embodiment, the sub-seal structure 17 is provided in the form of the first projection 171 to form a labyrinth seal passage between the bent portion 16 and the outer wall of the bearing housing 211, thus ensuring sealing performance while reducing rotational damping. Specifically, in the present embodiment, the locking protrusion 161 has a supporting section extending from the locking groove 210b, the supporting section has a height a, and the first protrusion 171 and the second protrusion 212 have a height b and a height c, respectively, so as to satisfy a > b, a > c, and a < (b+c).

Further, the periphery of the bending portion 16 extends toward the inner seal ring 12 to form an abutting portion 18, and the abutting portion 18 abuts against the outer wall of the stator 210. In this embodiment, the abutting portion 18 abuts against the outer wall of the bearing housing 211, so as to further reduce the probability of leakage from the inner wall of the rotation passage 210a.

Referring to fig. 6 to 10, the present utility model further provides a rotating device 200, which includes the labyrinth seal structure 100 and the stator 210 as described above; the stator 210 has a rotation channel 210a, and the rotation channel 210a is used for the rotor 220 to rotate and pass through; the outer seal ring 11 and the inner seal ring 12 are disposed around the rotor 220, the outer seal ring 11 is fixed to the rotor 220 and located outside the rotating channel 210a, the inner seal ring 12 is fixed to the stator 210 and located inside the rotating channel 210a, and the plurality of outer protrusions 13 extend into the rotating channel 210a. It should be noted that, the detailed structure of the labyrinth seal structure 100 of the rotating device 200 may refer to the above-mentioned embodiment of the labyrinth seal structure 100, and will not be described herein again; since the above labyrinth seal structure 100 is used in the rotating device 200 of the present utility model, the embodiment of the rotating device 200 of the present utility model includes all the technical solutions of all the embodiments of the above labyrinth seal structure 100, and the achieved technical effects are identical, and will not be described in detail herein.

Further, the stator 210 is a bearing housing 211, the rotating channel 210a is formed in the bearing housing 211, and a bearing 230 is provided for the rotor 220 to pass through, and the bearing 230 is located at one side of the inner sealing ring 12 away from the outer sealing ring 11. It should be understood that, in the present embodiment, both ends of the rotating channel 210a are opened, and two sets of the outer seal ring 11, the inner seal ring 12, the inner protrusion 14 and the outer protrusion 13 are correspondingly disposed.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims (10)

1. A labyrinth seal structure for rotating device, rotating device includes the stator, the stator is equipped with the rotation passageway that is used for supplying the rotor to rotate to wear to establish, its characterized in that, labyrinth seal structure includes:

the sealing ring comprises an outer sealing ring and an inner sealing ring which are sleeved on the periphery of the rotor, the outer sealing ring is used for being fixed on the rotor and located outside the rotating channel, and the inner sealing ring and the outer sealing ring are axially arranged at intervals and located on the inner side of the outer sealing ring and used for being fixed on the stator and located in the rotating channel;

the inner side ring of the outer sealing ring is provided with a plurality of outer bulges, the outer bulges are used for extending into the rotating channel, one side of the inner sealing ring, which is close to the outer sealing ring, is provided with a plurality of inner bulges, the inner bulges and the outer bulges are sequentially and alternately distributed along the radial direction of the inner bulges and are arranged at intervals, the inner bulges and the outer sealing ring are arranged at intervals along the axial direction of the inner bulges, and the outer bulges and the inner sealing ring are arranged at intervals along the axial direction of the inner sealing ring.

2. The labyrinth seal as in claim 1, wherein the peripheral edge of the inner seal ring is convexly provided with an extension portion toward the outer seal ring, and an end of the extension portion away from the inner seal ring is configured to extend out of the rotation channel and bend radially outward of the inner seal ring to form a bent portion, and an auxiliary seal structure is provided on a side of the bent portion toward the inner seal ring.

3. The labyrinth seal structure as recited in claim 2, wherein the bending portion is provided with a clamping protrusion protruding toward the inner seal ring, the clamping protrusion being configured to be clamped in a clamping groove provided on the outer wall of the stator.

4. A labyrinth seal as defined in claim 3, wherein said inner seal ring is adapted for interference engagement with said rotor, and each of said inner protrusions is provided with a stopper portion radially outwardly projecting therefrom, each of said outer protrusions is provided with a stopper portion radially inwardly projecting therefrom, said stopper portion being located inwardly of an adjacent stopper portion, wherein at least one of said stopper portion and said stopper portion is provided in an annular configuration for restricting said outer protrusion from axially exiting said rotational passage thereof.

5. The labyrinth seal as in claim 4, wherein the stop portion is spaced from the stop portion along the axial direction of the inner seal ring.

6. The labyrinth seal as in claim 4 or 5, wherein the stop is radially spaced from the corresponding outer projection; and/or the number of the groups of groups,

the limiting parts and the corresponding inner protrusions are arranged at intervals along the radial direction of the inner protrusions.

7. The labyrinth seal structure as claimed in claim 2, wherein a plurality of first protrusions are annularly arranged on one side of the bending part facing the inner seal ring, and the plurality of first protrusions are sequentially and alternately arranged with a plurality of second protrusions annularly arranged on the outer wall of the stator along the radial direction of the bending part at intervals so as to form a labyrinth seal channel between the bending part and the outer wall of the stator;

wherein a plurality of the first protrusions constitute the auxiliary sealing structure.

8. The labyrinth seal as recited in claim 7, wherein the bent portion has a periphery extending toward the inner seal ring and an abutment portion for abutting against an outer wall of the stator.

9. A rotary device, comprising:

the labyrinth seal structure as recited in any one of claims 1 to 8; the method comprises the steps of,

the stator is provided with a rotating channel which is used for the rotor to rotate and penetrate through;

the outer sealing ring and the inner sealing ring are arranged on the periphery of the rotor in a surrounding mode, the outer sealing ring is fixed to the rotor and located outside the rotating channel, the inner sealing ring is fixed to the stator and located in the rotating channel, and a plurality of outer protrusions extend into the rotating channel.

10. The rotating apparatus according to claim 9, wherein the stator is a bearing housing, the rotating passage is formed in the bearing housing, and wherein a bearing for the rotor to pass through is provided, the bearing being located on a side of the inner seal ring remote from the outer seal ring.