CN223004318U - Skeleton type multi-layer lip sealing element for shaft-connection bearing - Google Patents
Skeleton type multi-layer lip sealing element for shaft-connection bearing Download PDFInfo
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- CN223004318U CN223004318U CN202422172511.3U CN202422172511U CN223004318U CN 223004318 U CN223004318 U CN 223004318U CN 202422172511 U CN202422172511 U CN 202422172511U CN 223004318 U CN223004318 U CN 223004318U
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- diameter lip
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Abstract
The utility model discloses a skeleton type multi-layer lip sealing piece for a shaft-connected bearing, which comprises a metal skeleton with an annular structure and a rubber sealing ring coated on the metal skeleton, wherein an outer ring of the rubber sealing ring is provided with an outer diameter lip which is sealed and embedded in a sealing fixing groove, a first inner diameter lip, a second inner diameter lip and a third inner diameter lip are sequentially arranged from the self-sealing inside to the sealing outside of an inner ring, the first inner diameter lip is in clearance fit with a rotating mandrel, the second inner diameter lip is in transition fit with the rotating mandrel, and the third inner diameter lip is in interference fit with the rotating mandrel. The utility model adopts the multi-layer lips to realize rotary sealing, increases the metal framework, improves the integral rigidity of the sealing element, has more excellent sealing performance and longer service life.
Description
Technical Field
The utility model relates to the technical field of sealing elements, in particular to a skeleton type multi-layer lip sealing element for a shaft-connection bearing.
Background
The shaft connecting bearing is a double-support bearing with simplified structure, the two support bearings have no inner ring, the rollaway nest of the rolling body is directly made on the shaft, the two support bearing outer rings are made into a whole, and the two sides of the rings are sealed by sealing elements to form an assembly of the shaft sleeve. The sealing of the shaft-connected bearing is always one of important factors related to the service life of the bearing, the sealing element generally comprises sealing lips which are respectively in sealing contact with a rotating mandrel of the inner ring and a mounting and fixing groove of the outer ring, wherein the sealing lips of the outer ring and the mounting and fixing groove form static sealing, the sealing lips of the inner ring and the rotating mandrel form dynamic sealing, after long-time working, the sealing element is easy to deform, the sealing lips of the inner ring are only single-layer, external pollutants are led to enter the bearing due to long-term abrasion failure, or lubricating oil in the bearing overflows, and early failure of the shaft-connected bearing is accelerated. There is a need for structural optimization of existing shaft-to-bearing seals.
Disclosure of utility model
The utility model aims to provide a skeleton type multi-layer lip sealing piece for a shaft-to-bearing, which aims at the defects of the prior art, improves the integral rigidity of the sealing piece, has more excellent sealing performance and has longer service life.
The technical scheme for realizing the purpose of the utility model is as follows:
The utility model provides a skeleton formula multilayer lip sealing member for axle even bearing, includes annular structure's metal skeleton and cladding rubber seal on metal skeleton, rubber seal's outer lane is equipped with the external diameter lip of sealed dress in sealed fixed slot, and inner circle self-sealing is inside to be equipped with first internal diameter lip, second internal diameter lip and third internal diameter lip in proper order to sealed outside, first internal diameter lip and rotatory dabber clearance fit, second internal diameter lip and rotatory dabber transition fit, third internal diameter lip and rotatory dabber interference fit.
Further, the first inner diameter lip is disposed obliquely toward the seal interior.
Further, the second inner diameter lip is vertically arranged downwards, and a first V-shaped groove is formed between the second inner diameter lip and the first inner diameter lip.
Further, the bottom of the second inner diameter lip is provided with a slope provided toward the outside of the seal.
Further, the cross section of metal skeleton includes the first extension section, second extension section, third extension section and the fourth extension section that link to each other in proper order and set up, first extension section and third extension section are parallel and perpendicular with the second extension section, the fourth extension section is towards sealed inside slope setting.
Further, the third inner diameter lip is obliquely arranged towards the outside of the seal and forms a second V-shaped groove with the fourth extension section.
Further, the surface of the third inner diameter lip, which is contacted with the rotary mandrel, is provided with a plurality of lubrication grooves from the inside to the outside in parallel.
Further, the top of the outer diameter lip is a plane, and both sides are provided with chamfers.
By adopting the technical scheme, the utility model has the following beneficial effects:
(1) According to the utility model, the metal framework is additionally arranged on the basis of the traditional sealing element, so that the rigidity of the whole structure of the sealing element is improved, deformation is avoided, static sealing is formed through the outer diameter lip and the fixedly arranged mounting and fixing groove, most of lubricating oil in the sealing is blocked through the first inner diameter lip which is in clearance fit with the rotating mandrel, only a small part of lubricating oil reaches the second inner diameter lip, and a lubricating effect is provided for the second inner diameter lip which is in clearance fit with the rotating mandrel, so that the friction force of the multi-layer lip is reduced.
(2) The first inner diameter lip is obliquely arranged towards the inside of the seal, so that lubricating oil in the seal can be better blocked.
(3) According to the utility model, the first V-shaped groove is arranged, so that lubricating oil flowing through the groove can be stored, and a long-term lubricating effect is achieved.
(4) The bottom of the second inner diameter lip is provided with the inclined plane, so that the contact area with the rotary mandrel is reduced, the friction force is reduced, better rotation performance is realized, the inclined plane is arranged towards the outside of the seal, very little lubricating oil can be guided to flow to the third inner diameter lip, and meanwhile, substances outside the seal can be better isolated from flowing into the inner side.
(5) The metal framework forms two bending positions through the plurality of extending sections, so that the overall rigidity is ensured.
(6) According to the utility model, the second V-shaped groove is arranged to provide enough elastic space for the third inner diameter lip on the outer side, so that the problem of overlarge initial rotation torque caused by large interference of the third inner diameter lip can be effectively solved, the abrasion loss of the third inner diameter lip is reduced, the rebound resilience of the abraded third inner diameter lip after long-time operation is maintained, and the third inner diameter lip is always tightly attached to the shaft surface.
(7) By arranging the lubrication groove, the utility model not only provides long-term lubrication, but also realizes that after a small amount of substances in or outside the seal invade between the contact surface of the third inner diameter lip and the shaft surface, the substances can be detained in the lubrication groove to form a new sealing surface so as to block subsequent invasion.
(8) The top of the outer diameter lip is a plane, so that the contact area is increased, better sealing performance is realized, and chamfer angles are arranged on two sides of the outer diameter lip, so that the outer diameter lip is more convenient to be embedded in the installation fixing groove.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:
fig. 1 is a schematic view of a welding gun device according to the present utility model.
The reference numerals in the drawings are:
The metal framework 1, the first extension section 1-1, the second extension section 1-2, the third extension section 1-3, the fourth extension section 1-4, the rubber sealing ring 2, the outer diameter lip 2-1, the first inner diameter lip 2-2, the second inner diameter lip 2-3, the third inner diameter lip 2-4 and the lubrication groove 2-4-1;
The mandrel 100 is rotated.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Example 1
The skeleton-type multi-layer lip seal for the shaft-to-bearing shown in fig. 1 is mounted on a rotary mandrel 100 and comprises a metal skeleton 1 with an annular structure and a rubber sealing ring 2 coated on the metal skeleton, and the metal skeleton is additionally arranged on the basis of the traditional seal, so that the overall structural rigidity of the seal is improved, and deformation is avoided. The outer ring of the rubber sealing ring 2is provided with an outer diameter lip 2-1 which is hermetically embedded in the sealing fixing groove and forms static sealing with the mounting fixing groove, and a first inner diameter lip 2-2, a second inner diameter lip 2-3 and a third inner diameter lip 2-4 are sequentially arranged from the inner sealing part to the sealing part of the inner ring to form multilayer dynamic sealing. The first inner diameter lip 2-2 is in clearance fit with the rotating mandrel, the second inner diameter lip 2-3 is in transition fit with the rotating mandrel, the third inner diameter lip 2-4 is in interference fit with the rotating mandrel, most of lubricating oil in the seal is blocked by the first inner diameter lip 2-2, only a small part of lubricating oil reaches the second inner diameter lip 2-3, and a lubricating effect is provided for the second inner diameter lip 2-3, so that the friction force of the multi-layer lip is reduced, and as the second inner diameter lip 2-3 is in transition fit with the rotating mandrel, a small amount of lubricating oil can reach the third inner diameter lip 2-4, so that long-lasting lubrication can be provided for the third inner diameter lip 2-4, and the lubricating oil can not overflow to the outside of the seal.
Specifically, the section of the metal framework 1 comprises a first extension section 1-1, a second extension section 1-2, a third extension section 1-3 and a fourth extension section 1-4 which are sequentially connected, wherein the first extension section 1-1 and the third extension section 1-4 are parallel and perpendicular to the second extension section 1-2, and the fourth extension section 1-4 is obliquely arranged towards the inside of the seal, so that two bending positions are formed, and the integral rigidity is ensured.
The top of the outer diameter lip 2-1 is a plane, thereby increasing the contact area and realizing better sealing performance. Chamfer angles are arranged on two sides of the outer diameter lip 2-1, so that the outer diameter lip is more convenient to be embedded in the installation fixing groove.
The first inner diameter lip 2-2 is inclined toward the inside of the seal, so that lubrication oil in the inside of the seal can be better blocked. The second inner diameter lip 2-3 is vertically arranged downwards, and a first V-shaped groove is formed between the second inner diameter lip and the first inner diameter lip 2-2, and lubricating oil flowing through the first V-shaped groove is stored, so that a long-term lubricating effect is achieved. The bottom of second internal diameter lip 2-3 is equipped with the inclined plane towards sealed outside setting up to reduce the area of contact with rotatory dabber, reduce frictional force, realize more excellent rotation performance, and the inclined plane sets up towards sealed outside, can guide very little lubricating oil to flow to third internal diameter lip 2-4 department, and the material of better isolated outside flows into the inboard simultaneously. The third inner diameter lip 2-4 is inclined towards the outside of the seal and forms a second V-shaped groove with the fourth extension section 1-4, and a third V-shaped groove is formed between the third inner diameter lip 2-3. The third V-shaped groove has the same function as the first V-shaped groove, and provides enough elastic space for the third inner diameter lip 2-4 on the outer side through the second V-shaped groove, so that the problem of overlarge initial rotation torque caused by large interference of the third inner diameter lip 2-4 can be effectively reduced, the abrasion loss of the third inner diameter lip is reduced, the rebound resilience of the third inner diameter lip after abrasion is kept after long-time operation, and the third inner diameter lip is always tightly attached to the shaft surface. The surface of the third inner diameter lip 2-4 contacted with the rotary mandrel is provided with a plurality of lubrication grooves 2-4-1 from the inside to the outside in parallel, so that long-term lubrication is provided, and after a small amount of substances in the inside or outside of the seal invade between the contact surface of the third inner diameter lip and the shaft surface, the substances can be retained in the lubrication grooves to form a new sealing surface so as to block subsequent invasion.
In this embodiment, the first inner diameter lip 2-2 is in clearance fit with the shaft diameter by 0.05-0.15 mm, the second inner diameter lip 2-3 is in transition fit with the shaft diameter by +/-0.05 mm, and the third inner diameter lip 2-4 is in interference fit with the shaft diameter by more than 0.3 mm. When the sealing element is installed, liquid lubricating oil is coated on the surfaces of all inner diameter lips to provide initial lubrication for the lips, and the sealing element is installed in the installation fixing groove. The whole sealing member is in a static state relative to the mounting and fixing groove, and the axial surface rotates. In the rotating process, most of grease in the seal is blocked in the seal by the inclined plane of the first inner diameter lip 2-2, a small amount of grease enters the first V-shaped groove between the first inner diameter lip 2-2 and the second inner diameter lip 2-3, and continuous lubrication is provided for the lips in the long-time running process. The second inner diameter lip 2-3 is in transition fit with the shaft diameter, so that a small amount of grease can enter a third V-shaped groove between the second inner diameter lip 2-3 and the third inner diameter lip 2-4, and long-term lubrication is provided for the third inner diameter lip 2-4 in the long-term operation process. The outside outer diameter lip 1 and the shaft diameter are stored in a large excess amount, the material intercommunication between the inside and the outside of the seal can be effectively blocked, and due to the existence of the lubrication groove 2-4-1, even if a small amount of the material in the seal or the outside of the seal invades between the contact surface of the third inner diameter lip 2-4 and the shaft surface, the material can be detained in the lubrication groove 2-4-1 to form a new sealing surface so as to block the subsequent invasion. The second V-shaped groove is a sufficient elastic space of the third inner diameter lip 2-4, so that the problem of overlarge initial rotation torque caused by large interference of the outer inner diameter lip can be effectively solved, the abrasion loss of the outer inner diameter lip is reduced, the rebound resilience of the third inner diameter lip 2-4 after abrasion after long-time operation is kept, and the third inner diameter lip 2-4 is kept to be always tightly attached to the shaft surface.
According to the utility model, the metal framework is additionally arranged on the basis of the traditional sealing element, so that the rigidity of the whole structure of the sealing element is improved, deformation is avoided, static sealing is formed through the outer diameter lip and the fixedly arranged mounting and fixing groove, most of lubricating oil in the sealing is blocked through the first inner diameter lip which is in clearance fit with the rotating mandrel, only a small part of lubricating oil reaches the second inner diameter lip, and a lubricating effect is provided for the second inner diameter lip which is in clearance fit with the rotating mandrel, so that the friction force of the multi-layer lip is reduced.
While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.
Claims (8)
1. The skeleton type multi-layer lip sealing piece for the shaft-connection bearing is characterized by comprising a metal skeleton with an annular structure and a rubber sealing ring coated on the metal skeleton, wherein an outer ring of the rubber sealing ring is provided with an outer diameter lip which is sealed and embedded in a sealing fixing groove, a first inner diameter lip, a second inner diameter lip and a third inner diameter lip are sequentially arranged from the inner ring self-sealing inside to the sealing outside, the first inner diameter lip is in clearance fit with a rotating mandrel, the second inner diameter lip is in transition fit with the rotating mandrel, and the third inner diameter lip is in interference fit with the rotating mandrel.
2. The skeleton type multi-layer lip seal for a shaft-coupling bearing of claim 1, wherein the first inner diameter lip is inclined toward the inside of the seal.
3. The skeleton type multi-layer lip seal for the shaft-coupling bearing of claim 2, wherein the second inner diameter lip is arranged vertically downwards, and a first V-shaped groove is formed between the second inner diameter lip and the first inner diameter lip.
4. The skeleton-type multi-layer lip seal for a shaft-coupling bearing of claim 3, wherein the bottom of the second inner diameter lip is provided with a slope facing the outside of the seal.
5. The skeleton-type multi-layer lip seal for a shaft-connected bearing of claim 1, wherein the cross section of the metal skeleton comprises a first extension section, a second extension section, a third extension section and a fourth extension section which are sequentially connected, the first extension section and the third extension section are parallel and perpendicular to the second extension section, and the fourth extension section is obliquely arranged towards the inside of the seal.
6. The skeleton type multi-layer lip seal for a shaft-coupling bearing of claim 5, wherein the third inner diameter lip is disposed obliquely toward the outside of the seal and forms a second V-shaped groove with the fourth extension.
7. The skeleton type multi-layer lip seal for the shaft-connected bearing of claim 1, wherein the surface, which is contacted with the rotating mandrel, of the third inner diameter lip is provided with a plurality of lubrication grooves from the inside to the outside in parallel.
8. The skeleton type multi-layer lip seal for the shaft-connected bearing of claim 1, wherein the top of the outer diameter lip is a plane, and both sides of the outer diameter lip are provided with chamfers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422172511.3U CN223004318U (en) | 2024-09-05 | 2024-09-05 | Skeleton type multi-layer lip sealing element for shaft-connection bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422172511.3U CN223004318U (en) | 2024-09-05 | 2024-09-05 | Skeleton type multi-layer lip sealing element for shaft-connection bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223004318U true CN223004318U (en) | 2025-06-20 |
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ID=96050563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202422172511.3U Active CN223004318U (en) | 2024-09-05 | 2024-09-05 | Skeleton type multi-layer lip sealing element for shaft-connection bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223004318U (en) |
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2024
- 2024-09-05 CN CN202422172511.3U patent/CN223004318U/en active Active
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