CN202867855U - Explosion-proof type labyrinth seal - Google Patents
Explosion-proof type labyrinth seal Download PDFInfo
- Publication number
- CN202867855U CN202867855U CN 201220471902 CN201220471902U CN202867855U CN 202867855 U CN202867855 U CN 202867855U CN 201220471902 CN201220471902 CN 201220471902 CN 201220471902 U CN201220471902 U CN 201220471902U CN 202867855 U CN202867855 U CN 202867855U
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- Prior art keywords
- circular matrix
- labyrinth seal
- explosion
- wall
- proof type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses an explosion-proof type labyrinth seal which is arranged between a rotating element and a fixing element of rotating machinery. The explosion-proof type labyrinth seal comprises a circular matrix made of insulating materials. An outer wall of the circular matrix is connected with the fixing element. A plurality of raised lines is arranged on the inner wall of the circular matrix. A seal groove is formed among the raised lines, and each raised line is pointed at the surface of the rotating element. Insulating materials such as nylon, poly tetra fluoroethylene, and polyimide can be selected as the materials of the circular matrix. The outer wall of the circular matrix is provided with a clamping ring, the circular matrix is connected with the fixing element through the clamping ring. The outer wall of the circular matrix is also provided with a pin block placed between the circular matrix and the fixing element and the pin block prevents the circular matrix from rotating. The labyrinth seal is made of low-cost insulating materials and adopts an outer positioning method. The labyrinth seal are arranged inside a bearing pedestal or a bearing end cover of a sliding bearing, without direct contact with a rotor, and friction cannot happen. No spark appears while the labyrinth is collided with the rotor; therefore, the security is improved.
Description
Technical field
The utility model relates to sliding bearing, relates in particular to a kind of explosion-proof type labyrinth seal for the sealing of sliding bearing shaft extension end.
Background technique
Sealing is one of important indicator of test sliding bearing performance quality, shaft extension end at sliding bearing often adopts labyrinth seal, prevent that end cap parts of lubricating oil or mist of oil from along the effusion of the seal clearance between end cap and the axle, can prevent that also foreign matter from entering bearing inside simultaneously.The in the past used labyrinth seal of sliding bearing adopts Stamping Steel Ribbon to make or directly adopt the floating seal ring sealing of moulding more, the material that Stamping Steel Ribbon often uses is brass H62, this material can use in conventional environment, but when contacting with rotor, it can produce high temperature, and the shaft voltage that produces owing to motor-field in the situation of naked measure can produce electrical spark, so be not suitable for using in the operating mode that requirement of explosion proof is being arranged.If continue to adopt the sealing of copper Stamping Steel Ribbon, then material will be selected beryllium copper, and beryllium copper is not only expensive, and poisonous, has not only greatly increased manufacture cost, also can to environment, human body be damaged simultaneously.When adopting the floating seal ring sealing, although can not produce shaft voltage between floating seal ring and the rotor, do not have friction spark yet, but floating seal ring directly contacts with rotor, be contact seal, be only suitable under lower linear velocity, using, easy scaling loss under higher linear velocity, scaling loss can make sealing effect reduce, thereby can not use in the environment of explosion-proof high speed is arranged.
For satisfying the seal request of explosion-proof operating mode, be necessary to design a kind of explosion-proof type labyrinth seal.
The model utility content
The purpose of this utility model provides a kind of explosion-proof type labyrinth seal, to improve the Security of labyrinth seal, reduces its cost of production.
The utility model is that the technological scheme that its technical problem of solution adopts is,
A kind of explosion-proof type labyrinth seal, be located between the rotating member and fixed component of rotating machinery, include the annular matrix that insulating material is made, the outer wall of this annular matrix links to each other with fixed component, the annular matrix inwall is provided with some raised lines, form seal groove between the raised line, each raised line points to the rotating member surface; The material of annular matrix can be selected nylon, politef, polyimide etc.;
Particularly, the outer wall of described annular matrix has the clamping ring, and annular matrix is connected with fixed component by this clamping ring;
In addition, described annular matrix outer wall also is provided with pin block, and this pin block prevents that annular matrix from rotating between annular matrix and fixed component.
The utility model has the advantage of, this labyrinth seal adopts lower-cost insulating material to make, and the mode of employing outside fix, it can be installed in the bearing support or bearing (ball) cover of sliding bearing, with rotor without directly contacting, can not produce friction, and can not produce spark when colliding with rotor, promote its Security.
Description of drawings
Fig. 1 is the structural representation of the explosion-proof type labyrinth seal that the utility model proposes;
Fig. 2 is the use view of this explosion-proof type labyrinth seal in bearing (ball) cover.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with illustrating and specific embodiment, further set forth the utility model.
As shown in Figure 1 and Figure 2, the explosion-proof type labyrinth seal that the utility model proposes includes the annular matrix 1 that insulating material is made, the outer wall of annular matrix 1 links to each other with bearing (ball) cover 2, the inwall of annular matrix 1 is provided with raised line 11, form seal groove 12 between the raised line 11, raised line 11 points to rotor (not shown) surface; The outer wall of annular matrix 1 has clamping ring 13, and annular matrix 1 is connected with bearing (ball) cover 2 by clamping ring 13; The outer wall of annular matrix 1 also is provided with pin block 14, and pin block 14 can prevent that annular matrix 1 from rotating between annular matrix 1 and bearing (ball) cover 2.
This explosion-proof type labyrinth seal is partly made seal ring with labyrinth seal, and sealing ring material can be selected nylon, teflon, polyimide etc., and manufacture cost is lower.Seal ring is directly installed in the groove of the bearing support of sliding bearing or bearing (ball) cover, adopt outside fix, with rotor without directly contacting, can not produce friction each other, and produce spark with the rotor Shi Buhui that bumps, assemblage gap between seal ring and the rotor designs according to root diameter, is fit to any rotating speed; The seal ring selected materials has insulating properties, and can not produce shaft voltage between the rotor.Seal ring is made in labyrinth seal, be convenient to change, and seal ring is provided with pin block, can prevent its circumferential rotation.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. explosion-proof type labyrinth seal, be located between the rotating member and fixed component of rotating machinery, it is characterized in that, include the annular matrix that insulating material is made, the outer wall of this annular matrix links to each other with fixed component, the annular matrix inwall is provided with some raised lines, forms seal groove between the raised line, and each raised line points to the rotating member surface.
2. a kind of explosion-proof type labyrinth seal according to claim 1 is characterized in that the outer wall of described annular matrix has the clamping ring, and annular matrix is connected with fixed component by this clamping ring.
3. a kind of explosion-proof type labyrinth seal according to claim 1 is characterized in that, described annular matrix outer wall also is provided with pin block, and this pin block prevents that annular matrix from rotating between annular matrix and fixed component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471902 CN202867855U (en) | 2012-09-14 | 2012-09-14 | Explosion-proof type labyrinth seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471902 CN202867855U (en) | 2012-09-14 | 2012-09-14 | Explosion-proof type labyrinth seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867855U true CN202867855U (en) | 2013-04-10 |
Family
ID=48034577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220471902 Expired - Fee Related CN202867855U (en) | 2012-09-14 | 2012-09-14 | Explosion-proof type labyrinth seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867855U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313780A (en) * | 2017-08-04 | 2017-11-03 | 中船重型装备有限公司 | Novel sealing form shield machine center steering body |
-
2012
- 2012-09-14 CN CN 201220471902 patent/CN202867855U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313780A (en) * | 2017-08-04 | 2017-11-03 | 中船重型装备有限公司 | Novel sealing form shield machine center steering body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20180914 |