CN218145222U

CN218145222U - Rotary sealing structure and roller cage shoe

Info

Publication number: CN218145222U
Application number: CN202222174481.0U
Authority: CN
Inventors: 孟凡英; 张二报
Original assignee: Inner Mongolia Qianyuan Technology Co ltd
Current assignee: Inner Mongolia Qianyuan Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-12-27
Anticipated expiration: 2032-08-17

Abstract

The utility model relates to a gyro wheel cage shoe technical field, concretely relates to rotary seal structure and gyro wheel cage shoe, rotary seal structure includes fixed axle and wheel hub, and the wheel hub rotates and sets up on the fixed axle, is provided with sealing mechanism between fixed axle and the wheel hub, and sealing mechanism includes labyrinth seal subassembly and elastic sealing member, and the labyrinth seal subassembly includes first labyrinth ring and second labyrinth ring of mutually supporting, and first labyrinth ring sets up on the wheel hub, and the second labyrinth ring overlaps and sets up on the fixed axle; the outer edge of the elastic sealing element is connected with the hub, and the inner edge of the elastic sealing element is elastically abutted with the second labyrinth ring along the axial direction. The utility model provides a rotation seal structure, elastic sealing element can in time kick-back compensation when second labyrinth ring wearing and tearing, and elastic sealing element can elasticity butt in second labyrinth ring all the time, and sealed dustproof effect is better, can reduce the clearance that dust got into the bearing in the work progress effectively, prolongs the life of gyro wheel cage shoe device.

Description

Rotary sealing structure and roller cage shoe

Technical Field

The utility model relates to a gyro wheel cage shoe technical field, concretely relates to rotary seal structure and gyro wheel cage shoe.

Background

The roller cage shoe of the vertical shaft hoisting container is mainly used for guiding and buffering a cage and a skip of the vertical shaft hoisting container, and plays an important role in improving the safety and the comfort of the hoisting container. The bearing is the key part of the roller cage shoe, and has important influence on the safe reliability and the long service life of the roller cage shoe. During operation, the bearings are easily damaged by incoming dust, and therefore sealing means are provided to seal and protect them.

At present, a sealing device in a roller cage shoe generally comprises two sealing structures, wherein the first sealing structure is a labyrinth sealing structure, and the second sealing structure is a contact type sealing ring. Wherein, labyrinth seal structure moves labyrinth ring and quiet labyrinth ring including mutually supporting, because there is the fit clearance between moving labyrinth ring and the quiet labyrinth ring, labyrinth seal structure only can reduce outside dust and get into inside, but can not prevent the dust entering completely, the event has set up the second and has said sealedly, contact sealing washer promptly, and contact sealing washer need with move the labyrinth ring contact, can produce the wearing and tearing clearance between the two for a long time working, and the contact sealing washer is very little to the compensation in this wearing and tearing clearance, along with the continuation of gyro wheel rotates, the dust just can be followed inside this wearing and tearing clearance gets into the bearing, make the bearing lose efficacy because of wearing and tearing very fast. In a word, the reliability of the existing bearing sealing device cannot meet the requirement, dust still easily enters the bearing in the using process, and the using efficiency and the service life of the device are influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art that sealing device's contact sealing washer long-time work can produce the wearing and tearing clearance, and the dust gets into the bearing through the clearance easily in the use, and then influences bearing life's defect to a rotation seal structure and gyro wheel cage shoe that can effectively prevent the dust to get into inside the bearing, guarantee its life are provided.

In order to solve the above problem, on the one hand, the utility model provides a rotary seal structure sets up between fixed axle and wheel hub, and wheel hub rotates and sets up on the fixed axle, and rotary seal structure includes:

the labyrinth seal assembly comprises a first labyrinth ring and a second labyrinth ring which are matched with each other, the first labyrinth ring is arranged on the hub, and the second labyrinth ring is sleeved on the fixed shaft;

and the outer edge of the elastic sealing element is connected with the hub, and the inner edge of the elastic sealing element is elastically abutted with the second labyrinth ring along the axial direction.

Preferably, the outer edge of the elastic seal is interposed between the first labyrinth ring and the hub, the inner end surface of the second labyrinth ring is axially inwardly projected from the inner end surface of the first labyrinth ring, and the outer edge surface of the elastic seal is elastically in contact with the inner end surface of the second labyrinth ring.

Preferably, the second labyrinth ring comprises a main body and a wear-resistant piece which are mutually abutted, and the outer side surface of the inner edge of the elastic sealing piece is elastically abutted to the inner side end surface of the wear-resistant piece; the wear-resistant part is close to the fixed shaft, and the gap outlet of the second labyrinth ring and the first labyrinth ring is staggered with the wear-resistant part.

Preferably, the elastic sealing element is annular and is sleeved on the fixed shaft.

Preferably, the dust collector further comprises a first dust suction piece, and the first dust suction piece is arranged on one side, close to the elastic sealing piece, of the first labyrinth ring.

Preferably, the gap outlet of the second labyrinth ring and the first labyrinth ring is offset from the first dust collector.

Preferably, the dust collector further comprises a second dust collecting piece which is sleeved on the fixed shaft, the outer edge of the second dust collecting piece is connected with the hub, and the second dust collecting piece is located on one side, away from the first dust collecting piece, of the elastic sealing piece.

On the other hand, the utility model provides a gyro wheel cage shoe, including fixed axle, wheel hub and bearing assembly, bearing assembly sets up between fixed axle and wheel hub, still includes foretell rotary seal structure, and rotary seal structure's elastic sealing member is located between labyrinth seal subassembly and the bearing assembly.

Preferably, the bearing assembly comprises a first bearing, a sleeve and a second bearing which are arranged on the fixed shaft and abut against each other in sequence, the second bearing is an end face seal bearing, and a seal end of the second bearing faces the elastic seal member.

The utility model has the advantages of it is following:

1. the utility model provides a rotary seal structure, including labyrinth seal subassembly and elastic sealing element, the elastic sealing element outer fringe is connected with wheel hub, the structure that follows axial direction elasticity butt through elastic sealing element inner edge and second labyrinth ring is sealed, along with wheel hub pivoted in-process at elastic sealing element, can cause micro-wear to the second labyrinth ring, nevertheless because elastic sealing element has elasticity resilience surplus, can in time kick-back when the second labyrinth ring produces wearing and tearing, compensate to the wearing and tearing volume, make elastic sealing element can elasticity butt in second labyrinth ring all the time, and elastic sealing element still can play sealed effect simultaneously, make sealed dustproof effect better, can reduce the clearance that the dust got into the bearing in the use effectively, promote the life of gyro wheel cage shoe.

2. The utility model provides a rotary seal structure, elastic sealing element's outer fringe clamp is established between first labyrinth ring and wheel hub, and elastic sealing element's inner edge lateral surface and second labyrinth ring's medial surface elasticity butt are under the condition that the structure allows like this for elastic sealing element's length reaches the biggest, makes elastic sealing element can be elastic butt in second labyrinth ring all the time, and the compensation effect is best.

3. The utility model provides a rotary sealing structure, the second labyrinth ring comprises a main body and a wear-resistant part which are mutually butted, and the outer side surface of the inner edge of the elastic sealing part is elastically butted against the inner side end surface of the wear-resistant part; the fixed axle is pressed close to the wearing parts, and elastic compensation that elastic sealing spare and wearing parts contact department wearing and tearing can be timely ensures sealed dirt-proof effect, in addition, owing to set up independent wearing parts, has guaranteed the longer life of wearing parts, has improved sealing reliability.

4. The utility model provides a rotary seal structure, still include first dust absorption spare and second dust absorption spare, because the clearance export of second labyrinth ring and first labyrinth ring staggers the setting with the wearing parts, the wearing parts is not the shutoff in the clearance export of second labyrinth ring and first labyrinth ring promptly, first dust absorption spare is also not the shutoff in the clearance export of second labyrinth ring and first labyrinth ring simultaneously, make the dust that gets into from the clearance export of second labyrinth ring and first labyrinth ring can float at first labyrinth ring, elastic sealing element and wearing parts enclose in the space of establishing, it can further adsorb with the dust that spills in above-mentioned space floating dust and from elastic sealing element in the wearing parts effectively to set up first dust absorption spare and second dust absorption spare, promote sealed dirt-proof effect, extension fixture's life.

5. The utility model also provides a gyro wheel cage shoe, including bearing assembly with the utility model provides a rotation seal structure, sealed dustproof effect is better, can reduce the clearance that dust got into the bearing in the use effectively, promotes the life of gyro wheel cage shoe, and bearing assembly includes the second bearing moreover, the second bearing is end face seal bearing, its sealed end sets up towards elastic sealing element, end face seal bearing and first dust absorption piece, elastic sealing element and second dust absorption piece form four seals in proper order, it is sealed dustproof effectual, can effectively promote gyro wheel cage shoe life.

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

FIG. 1 shows a cross-sectional view of a roller can ear embodiment having a rotary seal structure according to the present invention;

FIG. 2 shows a cross-sectional view of a second roller shoe embodiment having a rotary seal structure of the present invention;

FIG. 3 shows a cross-sectional view of a third roller shoe embodiment having a rotary seal structure of the present invention;

fig. 4 shows a cross-sectional view of a fourth roller shoe embodiment having a rotary seal structure according to the present invention.

Description of reference numerals:

1. a fixed shaft; 2. a hub; 31. a labyrinth seal assembly; 311. a first labyrinth ring; 312. a second labyrinth ring; 3121. a main body; 3122. a wear part; 32. an elastomeric seal; 33. a first dust absorbing member; 34. a second dust-collecting member; 4. a bearing assembly; 41. a first bearing; 42. a sleeve; 43. a second bearing; 44. a clamp spring; 5. and (4) rubber wheels.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1, it is the utility model discloses the preferred embodiment of rotary seal structure, this rotary seal structure can be applied to the rotation wheel and rotate the sealed dustproof of setting bearing in the relevant structure of fixed axle through the bearing, also can be applied to the pivot and rotate the sealed dustproof of setting bearing in the relevant structure on the main part through the bearing, can prevent effectively that external dust from getting into the bearing, sealed effectual, guarantees the normal operating of bearing.

In this embodiment, this rotation seal structure sets up between fixed axle 1 and wheel hub 2, and wheel hub 2 rotates and sets up on fixed axle 1, and wherein fixed axle 1 is the cylinder axle, and wheel hub 2 can use metal material preparation such as stainless steel or aluminum alloy, also can use the rigid plastic material preparation, and wheel hub 2 outside still overlaps and is equipped with rubber tyer 5, and when using the gyro wheel cage shoe, rubber tyer 5 rolls at the inner wall of vertical shaft, provides the buffering direction to the container and makes the container can promote steadily.

The rotary seal structure includes a labyrinth seal assembly 31 and an elastomeric seal 32. Wherein, labyrinth seal subassembly 31 is including the first labyrinth ring 311 and the second labyrinth ring 312 of mutually supporting, first labyrinth ring 311 sets up on wheel hub 2, rotate along with wheel hub 2, second labyrinth ring 312 overlaps and establishes on fixed axle 1, all correspond on first labyrinth ring 311 and the second labyrinth ring 312 and be provided with a plurality of annular walls, first labyrinth ring 311 and second labyrinth ring 312 set up relatively, the crisscross labyrinth clearance that forms the tortuous of interlude each other of annular wall, prevent external dust impurity entering effectively.

More closely furtherly, wheel hub 2 is last to have seted up first mounting groove, first constant head tank has been seted up to the inner wall of first mounting groove, it is protruding that first joint is equipped with in first labyrinth ring 311 periphery, the protruding joint of first joint is in first constant head tank, the second constant head tank has been seted up on fixed axle 1, second labyrinth ring 312 inner wall is provided with the second joint arch, the protruding joint of second joint is in the second constant head tank, the erection bracing when the assembly personnel of being convenient for transfer, and the joint is tight real, first labyrinth ring 311 and second labyrinth ring 312 can not drop easily or shift because of vibrations in the use.

The outer edge of the elastic sealing element 32 is connected with the hub 2, and the inner edge is elastically abutted to the second labyrinth ring 312 along the axial direction. The elastic sealing element 32 is annular and is sleeved on the fixed shaft 1, the inner edge of the elastic sealing element 32 inclines towards the direction A shown in figure 1 relative to the outer edge of the elastic sealing element, namely, the inner edge of the elastic sealing element 32 applies a force opposite to the direction A to the second labyrinth ring 312, in the process that the elastic sealing element 32 rotates along with the hub, the second labyrinth ring 312 is abraded due to the inner edge of the elastic sealing element 32, when abrasion occurs, the abrasion can be immediately compensated by the elastic compensation allowance of the elastic sealing element 32, so that the elastic sealing element 32 can be always rebounded and abutted against the second labyrinth ring, and the sealing and dust prevention effects are good.

In the embodiment, the elastic sealing element 32 is made of stainless steel, for example, a spring plate, and has good wear-resisting effect and good rebound compensation effect.

Through the above-mentioned setting, at elastic sealing element 32 along with wheel hub 2 pivoted in-process, although can cause the trace wearing and tearing to second labyrinth ring 312, nevertheless because elastic sealing element 32 has elasticity resilience allowance, can in time kick-back when second labyrinth ring 312 produces wearing and tearing, compensate the wearing and tearing volume, make elastic sealing element 32 elasticity butt in second labyrinth ring 312 all the time, it is better to make sealed dustproof effect, can reduce the clearance that dust got into the bearing in the work progress effectively, promote the life of gyro wheel cage shoe.

Furthermore, the inner side end face of the second labyrinth ring 312 protrudes in the axial direction a than the inner side end face of the first labyrinth ring 311, and the outer side face of the inner edge of the elastic sealing element 32 elastically abuts against the inner side end face of the second labyrinth ring 312, so that the elastic sealing element 32 keeps a large elastic resilience allowance, and sealing can be compensated timely when the second labyrinth ring 312 and the elastic sealing element 32 are worn in contact, and the sealing effect is enhanced.

The embodiment also provides a roller cage shoe which comprises a fixed shaft 1, a hub 2, a bearing assembly 4 and the rotary sealing structure, wherein the bearing assembly 4 is arranged on the fixed shaft 1, the hub 2 is rotatably arranged on the fixed shaft 1 through the bearing assembly 4, specifically, the hub 2 is sleeved on the bearing assembly 4, and an elastic sealing element 32 is arranged between the labyrinth sealing assembly 31 and the bearing assembly 4, so that the further sealing effect can be achieved, dust can be effectively prevented from entering the bearing, and the service life of the roller cage shoe device is prolonged; meanwhile, the dynamic sealing surface is arranged on the inner ring, the linear velocity is low, and abrasion can be reduced to the maximum extent.

Further, the bearing assembly 4 includes a first bearing 41, a sleeve 42 and a second bearing 43 which are sequentially abutted on the shaft of the fixed shaft 1, specifically, a shoulder is provided at the end of the fixed shaft 1, the first bearing 41 abuts on the shoulder, the sleeve 42 abuts on the first bearing 41, one end of the second bearing 43 abuts on the sleeve 42, the other end abuts on a snap spring 44, and the snap spring 44 is fixedly provided on the fixed shaft 1.

Second bearing 43 is end face seal bearing, and its sealed end sets up towards elastic sealing element 32, further strengthens sealed dustproof effect, can effectively promote gyro wheel cage shoe life.

The seal compensation process of the roller ears in operation according to the present embodiment is described in detail below:

the roller cage ears are arranged on the periphery of the container, when the container is lifted in a vertical shaft, the rubber wheels 5 on the roller cage ears roll on the inner wall of the vertical shaft, the wheel hub 2 is driven to rotate, the wheel hub 2 rotates around the fixed shaft 1 through the bearing assembly 4, at the moment, the first labyrinth ring 311 and the elastic sealing piece 32 also rotate along with the wheel hub 2, the second labyrinth ring 312 is fixed on the fixed shaft 1, the elastic sealing piece 32 is always abutted against the second labyrinth ring 312, dust entering from a labyrinth gap outlet can be effectively prevented, meanwhile, the elastic sealing piece 32 is elastically abutted against the second labyrinth ring 312, although the second labyrinth ring 312 is slightly worn in the rotating process of the elastic sealing piece 32, the elastic sealing piece 32 can be timely rebounded and compensated and is always attached to the second labyrinth ring 312, so that the external dust is effectively prevented from entering the bearing assembly 4 of the roller cage ears, and the service life of the whole roller cage ear device is prolonged.

Example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that: the second labyrinth ring 312 of the present embodiment includes a main body 3121 and a wear-resistant member 3122 abutting each other, and an inner edge outer side surface of the elastic seal 32 elastically abuts against an inner side end surface of the wear-resistant member 3122; the wear-resistant member 3122 is annularly fixed on the fixed shaft 1. The gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311 is staggered from the wear-resistant member 3122, that is, the wear-resistant member 3122 does not block the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311, so that the wear-resistant member 3122 does not contact with the rotating first labyrinth ring 311, and the wear-resistant member 3122 is prevented from being worn by the rotating first labyrinth ring 311.

The abrasion of the contact part of the elastic sealing element 32 and the wear-resistant part 3122 can be compensated by the elastic allowance of the elastic sealing element 32 in time, and the sealing and dust-proof effects are guaranteed. In addition, due to the fact that the independent wear-resistant pieces 3122 are arranged, the service life of the wear-resistant pieces 3122 is prolonged, and sealing reliability is improved.

In this embodiment, the wear-resistant members 3122 are made of wear-resistant materials such as monomer cast nylon, ultra-high molecular weight polyethylene, and the like, and can be adapted to be used for a long time.

EXAMPLE III

As shown in fig. 3, the difference between the present embodiment and the second embodiment is: the rotary sealing structure of the present embodiment further includes a first dust suction member 33, the first dust suction member 33 is disposed on one side of the first labyrinth ring 311 close to the elastic sealing member 32, since the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311 is disposed to be staggered with respect to the wear-resistant member 3122, that is, the wear-resistant member 3122 does not block the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311, and the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311 is disposed to be staggered with respect to the first dust suction member 33, that is, the first dust suction member 33 does not block the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311, so that dust entering from the gap outlet of the second labyrinth ring 312 and the first labyrinth ring 311 can float in a space enclosed by the first labyrinth ring 311, the elastic sealing member 32 and the wear-resistant member 3122, and the provision of the first dust suction member 33 can effectively further adsorb dust floating in the space, thereby enhancing the sealing dustproof effect.

In the embodiment, the first dust-collecting part 33 is closely arranged on the axial end surface of the first labyrinth ring 311, and the axial end surface of the first labyrinth ring 311 forms a support for the first dust-collecting part 33, so that the first dust-collecting part 33 is stably installed and cannot be easily deflected or displaced.

Furthermore, the rotary sealing structure further comprises a second dust suction part 34, the second dust suction part 34 is sleeved on the fixed shaft 1, the outer edge of the second dust suction part 34 is connected with the hub 2, and the second dust suction part is positioned on one side of the elastic sealing element 32, which is far away from the first dust suction part 33. The second dust suction piece 34 can further adsorb a small amount of dust leaked between the elastic sealing piece 32 and the wear-resistant piece 3122, so that the sealing and dust-proof effects are further improved, and the service life of the device is prolonged.

In this embodiment, the first dust-collecting part 33 and the second dust-collecting part 34 are made of dust-collecting sponge, so that the manufacturing cost is low and the dust-collecting effect is good.

In other embodiments, the first dust-collecting member 33 and the second dust-collecting member 34 may be made of a material with good dust-collecting effect, such as activated carbon, without being limited thereto.

In other embodiments, the first dust-collecting part 33 may be spaced from the axial end surface of the first labyrinth ring 311, so as to further increase the exposed area of the first dust-collecting part 33 in the dust floating space and further improve the dust-absorbing effect

In other embodiments, the outer edge of the elastic sealing element 32 may also be fixedly connected to the hub 2 by means of a fixing element such as an adhesive or a bolt, so that the connection is more stable and firm, and the service life of the whole device is prolonged.

Fourth embodiment as shown in fig. 4, the present embodiment is different from the first embodiment in that: the fixed shaft 1 in the embodiment is a double-output shaft, two groups of rotary sealing structures are symmetrically arranged at two ends of the hub 2, the sealing and dust-proof effects on the bearing are good, the double-output shaft type dust collector can be applied to sealing of a bearing in a can with double-output shaft rollers, and the first dust collector 33, the second dust collector 34 and the wear-resistant part 3122 can also be adaptively arranged according to requirements without excessive limitation.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a rotary seal structure, sets up between fixed axle (1) and wheel hub (2), wheel hub (2) rotate to be set up on fixed axle (1), its characterized in that, rotary seal structure includes:

the labyrinth seal assembly (31) comprises a first labyrinth ring (311) and a second labyrinth ring (312) which are matched with each other, the first labyrinth ring (311) is arranged on the hub (2), and the second labyrinth ring (312) is sleeved on the fixed shaft (1);

an elastic seal (32) having an outer edge connected to the hub (2) and an inner edge elastically abutting against the second labyrinth ring (312) in the axial direction.

2. The rotary seal structure according to claim 1, wherein an outer edge of the elastic seal member (32) is interposed between the first labyrinth ring (311) and the hub (2), an inner side end surface of the second labyrinth ring (312) is axially inwardly projected from an inner side end surface of the first labyrinth ring (311), and an inner edge outer side surface of the elastic seal member (32) is elastically abutted against an inner side end surface of the second labyrinth ring (312).

3. The rotary seal structure according to claim 2, characterized in that the second labyrinth ring (312) comprises a main body (3121) and a wear piece (3122) abutting each other, an inner edge outer side face of the elastic seal (32) elastically abutting an inner side end face of the wear piece (3122); the wear-resistant piece (3122) is close to the fixed shaft (1), and the gap outlet of the second labyrinth ring (312) and the first labyrinth ring (311) is staggered with the wear-resistant piece (3122).

4. The rotary seal structure according to claim 1, wherein the elastic sealing member (32) is annular and is fitted over the stationary shaft (1).

5. The rotary seal structure according to any one of claims 1 to 4, further comprising a first dust suction member (33), the first dust suction member (33) being provided on a side of the first labyrinth ring (311) adjacent to the elastic seal member (32).

6. The rotary seal structure according to claim 5, characterized in that gap outlets of the second labyrinth ring (312) and the first labyrinth ring (311) are arranged offset from the first dust collector (33).

7. The rotary seal structure of claim 5, further comprising a second dust-absorbing member (34) sleeved on the fixed shaft (1), wherein an outer edge of the second dust-absorbing member (34) is connected with the hub (2) and is located on a side of the elastic sealing member (32) away from the first dust-absorbing member (33).

8. Roller cage shoe comprising a stationary shaft (1), a hub (2) and a bearing assembly (4), said bearing assembly (4) being arranged between said stationary shaft (1) and said hub (2), characterized in that it further comprises a rotary seal according to any of claims 1-7, said rotary seal having an elastic seal (32) arranged between a labyrinth seal assembly (31) and said bearing assembly (4).

9. A roller cage shoe according to claim 8, characterized in that the bearing assembly (4) comprises a first bearing (41), a sleeve (42) and a second bearing (43) arranged on the stationary shaft (1) and abutting in sequence, the second bearing (43) being an end face seal bearing, the sealing end of which is arranged towards the resilient seal (32).