CN207814238U - A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing - Google Patents
A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing Download PDFInfo
- Publication number
- CN207814238U CN207814238U CN201721831446.4U CN201721831446U CN207814238U CN 207814238 U CN207814238 U CN 207814238U CN 201721831446 U CN201721831446 U CN 201721831446U CN 207814238 U CN207814238 U CN 207814238U
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- Prior art keywords
- seal
- outer diameter
- sealing
- bearing
- axle box
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- Sealing Of Bearings (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model is related to a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, the " U "-shaped structure of external seal of the sealing, big outer diameter face coordinates with bearing outer ring seal groove, and there are gaps between aperture surface and seal receptacle, form non-contact seals；The " U "-shaped structure of Inner baffle rings, outer diameter face are installed between bearing inner race and seal receptacle, and aperture surface is mating surface and is interference fitted with the small outer diameter of seal receptacle that there are gaps between outer diameter face and the " u "-shaped chamber upper surface of external seal, form non-contact seals.Using the utility model, it is combined by external seal and Inner baffle rings, twice non-contacting seal is formed between external seal and seal receptacle and Inner baffle rings outer diameter face and external seal " u "-shaped chamber upper surface, and the " u "-shaped chamber of the " u "-shaped chamber of external seal and Inner baffle rings forms " sealing room ", can effectively prevent intrusion and the Bearing inner bleeding of lubricant of introduced contaminants；Sealing structure is simple, compact, has both contact seal and contactless advantage.
Description
Technical field
The utility model is related to a kind of sealing of special bearing, it is related specifically to a kind of for high-speed EMUs axle box bearing
Non-contacting seal.
Background technology
High-speed EMUs axle box bearing is the key components and parts of motor train unit bogie, the property such as speed, life and reliability
Vehicle reliability of operation and safety can be directly affected.Bearing seal is the important component of axle box bearing, with axle box
The high speed of bearing, long-life and high reliability are closely related.
Domestic high-speed EMUs axle box bearing product, including axle box bearing Special seal still belong to blank.Existing bearing is close
Encapsulation technique mainly has contact seal and non-contacting seal.Contact seal is in close contact using two Contact Pairs even applies bullet
The mode of spring restraining force can effectively prevent the invasion of grease leakage and introduced contaminants to reach preferable sealing effect, but can produce
Raw larger friction, does not adapt to the requirement of high speed, while frictional heating can influence bearing life and reliability.It is non-contact
Formula sealing uses two seal interfaces there are the sealing means of certain interval to achieve the effect that contactless friction, can adapt to higher
Running speed, but will produce the risk of the invasion of grease leakage and external contaminants, influence the life and reliability of bearing.
Overseas high speed EMU axle box bearing product, including axle box bearing Special seal have matured product, but related skill
Art holds in close confidence, not yet discloses its Special seal technology and product.
Invention content
The utility model is to solve the above problems, a kind of labyrinth for high-speed EMUs axle box bearing of offer is contactless
Sealing.
The technical scheme in the invention for solving the above technical problem is：One kind being used for high-speed EMUs axle box bearing
Labyrinth non-contact sealing, it is characterised in that the sealing is made of external seal, inner shield ring, with seal receptacle form sealing pair；Outside
" U "-shaped structure is sealed, big outer diameter face and aperture surface form " u "-shaped chamber, and big outer diameter face is that mounting surface is sealed with bearing outer ring
Slot coordinates, and there are gaps between aperture surface and seal receptacle, form non-contact seals；The " U "-shaped structure of Inner baffle rings, outer diameter face with
Aperture surface forms " u "-shaped chamber, and outer diameter face is installed between bearing inner race and seal receptacle, and aperture surface is mating surface and small with seal receptacle
Outer diameter is interference fitted, and there are gaps between outer diameter face and the " u "-shaped chamber upper surface of external seal, form non-contact seals.
A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, it is characterised in that external seal is pacified
Loaded on static in bearing outer ring seal groove and with bearing outer ring, Inner baffle rings are installed on seal receptacle, and with bearing inner race and sealing
Seat rotates together.
A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, it is characterised in that external seal
Big outer diameter face band boss, can be caught in bearing outer ring seal groove.
A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, it is characterised in that external seal is adopted
With steel plate punched "u"-shaped.
A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, it is characterised in that Inner baffle rings are adopted
It is molded "u"-shaped with PA66-GF25 polyamide.
The utility model has an advantageous effect in that：High-speed EMUs axle box bearing sealing uses the contactless knot in labyrinth
Structure is combined by external seal and Inner baffle rings, in external seal and seal receptacle and Inner baffle rings outer diameter face and external seal " u "-shaped chamber upper surface
Between form twice non-contacting seal, and the " u "-shaped chamber of the " u "-shaped chamber of external seal and Inner baffle rings forms " sealing room ", can have
Effect prevents intrusion and the Bearing inner bleeding of lubricant of introduced contaminants；Sealing structure is simple, compact, and the Inner baffle rings of rotation use
Plastic material has the characteristics that light-weight, elasticity is excellent, the labyrinth seal structure tool of twice non-contact seals and " sealing room " composition
There is an excellent sealing performance, and contactless friction generates, compared with usual non-contacting seal, sealing effect is superior and frictional property
Can be identical, compared with contact seal, sealing effect quite and frictional behaviour is superior, have both contact seal and contactless
Advantage, comprehensive performance are better than existing sealing technique product, and the use that can meet 350km/h high-speed EMUs axle box bearings is wanted
It asks.
Description of the drawings
Fig. 1 is the installation diagram of the utility model sealing and axle box bearing.
In figure：Bearing outer ring 1；Bearing inner race 2；External seal 3；Inner baffle rings 4；Seal receptacle 5；Boss 6.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig.1, which is made of external seal 3, inner shield ring 4, and sealing pair is formed with seal receptacle 5；External seal 3 is in " U "
Shape structure, big outer diameter face and aperture surface form " u "-shaped chamber, and big outer diameter face is mounting surface and close with 1 seal groove of bearing outer ring
Cooperation, big outer diameter face band boss 6, can be caught in 1 seal groove of bearing outer ring.There are gaps between aperture surface and seal receptacle 5, are formed
Non-contact seals；4 " U "-shaped structure of Inner baffle rings, outer diameter face form " u "-shaped chamber with aperture surface, and outer diameter face is installed in bearing
Between circle 2 and seal receptacle 5, aperture surface is mating surface and is interference fitted with 5 small outer diameter of seal receptacle, " U " of outer diameter face and external seal
There are gaps between shape chamber upper surface, form non-contact seals.Among the above, external seal 3 uses steel plate punched "u"-shaped,
Inner baffle rings 4 are molded "u"-shaped using PA66-GF25 polyamide.
External seal 3 and Inner baffle rings 4 are installed between bearing outer ring 1, bearing inner race 2 and seal receptacle 5 by the utility model, will
Bearing inner is separated with the external world, realizes the sealing of bearing；External seal 3 therein is installed in 1 seal groove of bearing outer ring and and axis
Bearing outer-ring 1 is static, and Inner baffle rings 4 are installed on seal receptacle 5, and is rotated with bearing inner race 2 and seal receptacle 5, with bearing outer ring 1
Sealing pair is formed between the inner shield ring 4 and seal receptacle 5 of static external seal 3 and rotation, wherein the internal diameter of external seal 3 and sealing
Seat 5 forms non-contact seals, and non-contact seals are formed between the " u "-shaped chamber upper surface and the outer diameter face of Inner baffle rings 4 of external seal 3,
It is formed between the " u "-shaped chamber of external seal 3 and the " u "-shaped chamber of Inner baffle rings 4 " sealing room ".Pass through 4 correlation table of external seal 3 and Inner baffle rings
" sealing room " multiple non-contact labyrinth sealing that face and " u "-shaped chamber are formed, has preferable sealing effect and contactless friction
It generates, has both contact seal and contactless advantage, the low of the high speed demand of high-speed EMUs axle box bearing can be taken into account
The good seal performance of friction and long-life, highly reliable demand, can meet the use of 350km/h high-speed EMUs axle box bearings
It is required that.
Claims (5)
1. a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing, it is characterised in that the sealing by external seal,
Inner shield ring forms, and sealing pair is formed with seal receptacle；The " U "-shaped structure of external seal, big outer diameter face and aperture surface form " u "-shaped
Chamber, big outer diameter face are that mounting surface coordinates with bearing outer ring seal groove, and there are gaps between aperture surface and seal receptacle, are formed non-contact
Sealing；The " U "-shaped structure of Inner baffle rings, outer diameter face form " u "-shaped chamber with aperture surface, and outer diameter face is installed on bearing inner race and sealing
Between seat, aperture surface is mating surface and is interference fitted with the small outer diameter of seal receptacle, the " u "-shaped chamber upper surface of outer diameter face and external seal it
Between there are gap, form non-contact seals.
2. a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing according to claim 1, feature
It is in bearing outer ring seal groove and static with bearing outer ring to be that external seal is installed on, Inner baffle rings are installed on seal receptacle, and with axis
It holds inner ring and seal receptacle rotates together.
3. a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing according to claim 1, feature
It is the big outer diameter face band boss of external seal, can be caught in bearing outer ring seal groove.
4. a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing according to claim 1, feature
It is that external seal uses steel plate punched "u"-shaped.
5. a kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing according to claim 1, feature
It is that Inner baffle rings are molded "u"-shaped using PA66-GF25 polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721831446.4U CN207814238U (en) | 2017-12-25 | 2017-12-25 | A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721831446.4U CN207814238U (en) | 2017-12-25 | 2017-12-25 | A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207814238U true CN207814238U (en) | 2018-09-04 |
Family
ID=63330641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721831446.4U Active CN207814238U (en) | 2017-12-25 | 2017-12-25 | A kind of labyrinth non-contact sealing for high-speed EMUs axle box bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207814238U (en) |
-
2017
- 2017-12-25 CN CN201721831446.4U patent/CN207814238U/en active Active
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