CN220850420U - Labyrinth oil seal for internal and external combined type rail transit bearing - Google Patents
Labyrinth oil seal for internal and external combined type rail transit bearing Download PDFInfo
- Publication number
- CN220850420U CN220850420U CN202322874159.3U CN202322874159U CN220850420U CN 220850420 U CN220850420 U CN 220850420U CN 202322874159 U CN202322874159 U CN 202322874159U CN 220850420 U CN220850420 U CN 220850420U
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- China
- Prior art keywords
- oil seal
- lip
- framework
- rail transit
- seal framework
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- 238000007789 sealing Methods 0.000 claims abstract description 37
- 239000004519 grease Substances 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a labyrinth oil seal for an inner and outer combined type rail transit bearing, which belongs to the technical field of rail transit bearings, overcomes the defect that grease of the existing combined type rail transit bearing is easy to leak, and comprises an outer oil seal framework arranged on an outer ring of the bearing, and is characterized in that: the outer oil seal framework is annular, the unilateral section of the outer oil seal framework is 7-shaped, a sealing piece connected together is arranged in the outer oil seal framework, the sealing piece comprises an outer lip and an inner lip, the outer lip and the inner lip are spaced and basically perpendicular to the joint surface of the outer oil seal framework and the sealing piece body, the inner oil seal framework is sleeved outside the periphery of the inner lip, a dustproof lip is arranged between the inner lip and the inner oil seal framework, a groove is formed in the inner lip, grease inside the inner lip is not easy to leak, and the sealing performance is improved; the key slot holes are arranged on the outer oil seal framework, so that the joint force is improved, and the tightness is improved.
Description
Technical Field
The utility model belongs to the technical field of rail transit bearings, and particularly relates to a labyrinth oil seal for an internal and external combined type rail transit bearing.
Background
The axle box bearing of the rail transit vehicle adopts a maintenance-free integral structure at present, and the design of a sealing structure is particularly critical, and is closely related to the speed, the service life and the reliability of the axle box bearing, thereby relating to the safety, the reliability and the comfort of the running of the vehicle.
Existing bearing seals can be categorized into contact seals and non-contact seals, depending on whether the seal is in contact with the component against which it acts. The contact type seal can achieve the purpose of contact seal by means of interference fit between the rubber lip and the contact surface, grease or fluid can be effectively sealed, external pollutants are blocked, but the running temperature of the bearing is higher due to friction of the interference fit, the application requirement of a vehicle on high speed cannot be met, and the sealing effect is gradually reduced along with abrasion of the oil seal lip. The non-contact type seal achieves the sealing purpose by throttling the fluid along the tiny annular gap under the viscous friction loss, has lower friction torque and temperature rise, higher limit rotation speed and stronger adaptability to environment, and is insufficient in the aspect of preventing the leakage of lubricating grease.
In the prior art, a mixed labyrinth sealing device of a rail transit bearing is arranged, an outer framework of the device is of a multiple bending structure and is provided with a U-shaped cavity, an outer diameter surface is matched with a sealing groove of an outer ring of the bearing, and an inner diameter surface is in clearance fit with a sealing seat to form non-contact labyrinth sealing; the spacer ring is of a U-shaped structure, the outer diameter surface is in radial and axial clearance fit with the lower surface of the U-shaped cavity of the outer framework, the inner diameter surface of the V-shaped sealing ring is used as a mounting surface to be in interference fit with the sealing seat, and the lip is in interference fit with the side surface of the U-shaped cavity of the outer framework. According to the utility model, the outer framework, the spacer ring, the sealing seat and the V-shaped sealing ring are combined, and the U-shaped cavity of the outer framework and the U-shaped cavity of the spacer ring form a sealing chamber; the V-shaped sealing ring and the outer framework form light contact type seal with small contact pressure, and the light contact type seal and the outer framework are overlapped to effectively prevent grease in the bearing from leaking and foreign matters from entering the bearing, so that the bidirectional seal effect is effectively achieved.
However, in the bearing sealing member with the structure, the outside of the labyrinth sealing contact surface is lack of protection, grease in the lip is easy to leak, early aging of the sealing member is easy to cause, the sealing member is large in size and multiple in parts, assembly and combination are not tight, the sealing effect of the sealing member is improved, and the whole life expectancy of the sealing member is improved, so that the sealing member is a technical problem which is needed to be solved currently.
Disclosure of utility model
The purpose of the utility model is that: the labyrinth oil seal for the internal and external combined rail transit bearing is provided to solve the technical problems in the prior art.
According to the above purpose, the basic technical scheme of the utility model is as follows: the utility model provides an inside and outside combination formula labyrinth oil blanket for rail transit bearing, includes the outer oil blanket skeleton of installing on the bearing outer race, its characterized in that: the outer oil seal framework is annular, the unilateral cross section of the outer oil seal framework is 7-shaped, a sealing piece connected together is arranged in the outer oil seal framework, the sealing piece comprises an outer lip and an inner lip, the outer lip and the inner lip are basically perpendicular to the joint surface of the outer oil seal framework and the sealing piece body at intervals, the inner oil seal framework is further sleeved outside the periphery of the inner lip, a dustproof lip tightly connected with the inner oil seal framework is further arranged between the inner lip and the inner oil seal framework, and a groove is further formed in the inner lip on the same side as the dustproof lip.
Further, the outer oil seal framework is provided with a key slot hole, and a sealing element is connected in the key slot hole.
Further, the key slot hole is in a long slot waist shape.
Furthermore, the key slot holes are uniformly distributed on the circumference of the outer oil seal framework.
Further, a small boss is arranged on the outer end face of the outer oil seal framework.
Further, the unilateral section of the inner oil seal framework is in a shape of an opening at one corner.
Further, a railway grease is coated between the groove and the inner oil seal framework.
Further, the addition amount of the railway grease is 2-4g.
Further, the unilateral section of the inner lip comprising the dustproof lip is in a K shape.
The labyrinth oil seal for the inner and outer combined type rail transit bearing is characterized in that a protective sleeve with a single-side section in a vertical and transverse fold shape is further arranged on the outer surface of the outer oil seal framework on a finished product of the labyrinth oil seal.
Compared with the prior art, the utility model has the advantages and beneficial effects that:
1. The inner oil seal framework is sleeved outside the periphery of the inner lip of the product, so that grease inside the inner lip is not easy to leak, and the tightness is improved;
2. The key slot holes are arranged on the outer oil seal framework of the product, so that the joint force of the sealing piece and the outer oil seal framework is improved, and the combination is firm;
3. the unilateral section of the inner oil seal skeleton of the product is in a shape of an opening at one corner, so that grease in the lip is further prevented from leaking, and the tightness is improved.
Drawings
FIG. 1 is a schematic view of a part of the structure of an embodiment of the product of the present utility model;
FIG. 2 is a schematic cross-sectional view of the outer oil seal skeleton of the product of the present utility model;
FIG. 3 is a schematic diagram of a front view of the structure of the portion A in FIG. 2;
FIG. 4 is a schematic view of a portion of a protective sleeve mounted on a labyrinth seal;
In the figure: 1. an inner oil seal framework; 2. an outer oil seal framework; 21. a key slot; 22. a small boss; 3. a seal; 31. an inner lip; 32. an outer lip; 33. a dust lip; 4. railway grease; 5. a protective sleeve; 6. a groove.
Detailed Description
Referring to fig. 1 to 4, a schematic structural diagram of an embodiment of a labyrinth seal for an inner and outer combined track traffic bearing according to the present utility model is provided, the labyrinth seal for an inner and outer combined track traffic bearing comprises an outer oil seal frame 2 mounted on an outer ring of the bearing, the outer oil seal frame 2 is ring-shaped, a single side section of the outer oil seal frame is 7-shaped, a seal member 3 connected together is arranged in the outer oil seal frame 2, the seal member 3 comprises an outer lip 32 and an inner lip 31, a space between the outer lip 32 and the inner lip 31 is substantially perpendicular to a joint surface of the outer oil seal frame 2 and a seal member 3 body, an inner oil seal frame 1 is sleeved outside a periphery of the inner lip 31, a dust lip 33 tightly connected with the inner oil seal frame 1 is further arranged between the inner lip 31 and the inner oil seal frame 1, a groove 6 is further arranged on the inner lip 31 on the same side as the dust lip 33, a railway 4 is coated between the groove 6 and the inner oil seal frame 1, and the added amount of grease 4 is 3g; the circumference of the outer oil seal framework 2 is provided with 3 key slot holes 21 which are uniformly distributed in a long slot shape, and the key slot holes 21 are connected with a sealing element 3; the outer end face of the outer oil seal framework 2 is provided with a small boss 22, the unilateral cross section of the inner oil seal framework 1 is in a shape of a mouth with an opening at one corner, and the unilateral cross section of an inner lip 31 comprising a dustproof lip 33 is in a shape of a K.
During installation, the sealing element 3 is molded on the outer oil seal framework 2, then the railway lubricating grease 4 is filled in the groove 6 of the sealing element 3, the formed inner oil seal framework 1 is sleeved in place along the dustproof lip 33 of the inner lip 31 to form an assembly part, and the protective sleeve 5 is sleeved outside the outer oil seal framework 2 to form a finished product.
The labyrinth oil seal for the inner and outer combined type rail transit bearing is characterized in that a protective sleeve 5 with a single-side section in a vertical and transverse fold shape is further arranged on the outer surface of the outer oil seal framework 2 on a finished product of the labyrinth oil seal.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Although used more herein: 1. an inner oil seal framework; 2. an outer oil seal framework; 21. a key slot; 22. a small boss; 3. a seal; 31. an inner lip; 32. an outer lip; 33. a dust lip; 4. a grease; 5. a protective sleeve; 6. grooves, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.
The labyrinth seal for the combined internal and external rail transit bearing provided by the utility model is described above, and specific preferred examples are applied to the description of the principle and implementation mode of the utility model, these examples are only used for helping to understand the principle and core thought of the utility model, it should be pointed out that, for those skilled in the art, the implementation modes of the examples can be further combined or replaced without departing from the design thought of the utility model, and the utility model can be modified and modified in several ways, and these modifications and modifications also fall within the protection scope of the claims of the utility model.
Claims (10)
1. The utility model provides an inside and outside combination formula labyrinth oil blanket for rail transit bearing, includes outer oil blanket skeleton (2) of installing on the bearing outer race, its characterized in that: the outer oil seal framework (2) is annular, the unilateral cross section of the outer oil seal framework is 7-shaped, a sealing piece (3) connected with the inner oil seal framework (2) is arranged in the outer oil seal framework (2), the sealing piece (3) comprises an outer lip (32) and an inner lip (31), the outer lip (32) and the inner lip (31) are basically perpendicular to the joint surface of the outer oil seal framework (2) and the sealing piece (3) body at intervals, the inner lip (31) is also sleeved with the inner oil seal framework (1) in the periphery, a dustproof lip (33) tightly connected with the inner oil seal framework (1) is further arranged between the inner lip (31) and the inner lip (31) on the same side of the dustproof lip (33), and a groove (6) is further formed in the inner lip (31).
2. The labyrinth seal for the combined internal and external rail transit bearing according to claim 1, wherein: the outer oil seal framework (2) is provided with a key slot hole (21), and the key slot hole (21) is connected with a sealing piece (3).
3. The labyrinth seal for the combined internal and external rail transit bearing according to claim 2, wherein: the key slot hole (21) is in a long slot waist shape.
4. The labyrinth seal for the combined internal and external rail transit bearing according to claim 2, wherein: the key slot holes (21) are uniformly distributed on the circumference of the outer oil seal framework (2).
5. The labyrinth seal for the combined internal and external rail transit bearing according to claim 1, wherein: the outer end face of the outer oil seal framework (2) is provided with a small boss (22).
6. The labyrinth seal for the combined internal and external rail transit bearing according to claim 1, wherein: the unilateral section of the inner oil seal framework (1) is in a shape of an opening at one corner.
7. The labyrinth seal for the combined internal and external rail transit bearing according to claim 1, wherein: a railway lubricating grease (4) is coated between the groove (6) and the inner oil seal framework (1).
8. The labyrinth seal for the combined internal and external rail transit bearing as claimed in claim 7, wherein: the addition amount of the railway lubricating grease (4) is 2-4g.
9. The labyrinth seal for the combined internal and external rail transit bearing according to claim 1, wherein: the unilateral section of the inner lip (31) comprising the dustproof lip (33) is in a K shape.
10. The labyrinth seal for an internal and external combined rail transit bearing according to any one of claims 1 to 9, wherein: the outer surface of the outer oil seal framework (2) on the finished product of the labyrinth oil seal is also provided with a protective sleeve (5) with a single-side section in a vertical and transverse fold shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322874159.3U CN220850420U (en) | 2023-10-25 | 2023-10-25 | Labyrinth oil seal for internal and external combined type rail transit bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322874159.3U CN220850420U (en) | 2023-10-25 | 2023-10-25 | Labyrinth oil seal for internal and external combined type rail transit bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220850420U true CN220850420U (en) | 2024-04-26 |
Family
ID=90787929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322874159.3U Active CN220850420U (en) | 2023-10-25 | 2023-10-25 | Labyrinth oil seal for internal and external combined type rail transit bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220850420U (en) |
-
2023
- 2023-10-25 CN CN202322874159.3U patent/CN220850420U/en active Active
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