CN207420953U - A kind of impeller back seal structure - Google Patents
A kind of impeller back seal structure Download PDFInfo
- Publication number
- CN207420953U CN207420953U CN201721413779.5U CN201721413779U CN207420953U CN 207420953 U CN207420953 U CN 207420953U CN 201721413779 U CN201721413779 U CN 201721413779U CN 207420953 U CN207420953 U CN 207420953U
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- Prior art keywords
- impeller
- seal
- sealing
- concave part
- sealing ring
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Abstract
The utility model discloses a kind of impeller back seal structures, and including impeller and seal receptacle, the back of the impeller is equipped with concave part, and seal receptacle is placed in the concave part, and running clearance is formed between impeller and seal receptacle；The concave part is equipped with sealing ring, and seal groove is equipped on seal receptacle, and sealing ring is stretched in seal groove.Also enough effective seal lengths be can guarantee during rotor axial play, it is ensured that sealing effect；According to axial force of impeller it needs to be determined that the position of sealing tooth, obtains rational axial force of impeller.
Description
Technical field：
The utility model is related to a kind of impeller back seal structures.
Background technology：
Existing impeller back seal is that sealing tooth is arranged at impeller back, is arranged using axial seal or at main shaft
Tooth is sealed, using radial seal, there are following defects for above-mentioned sealing structure：
1) when using axial seal, rotor axial play causes seal clearance to increase, and sealing effect is deteriorated；
2) when using radial seal, the axial force of impeller can not be adjusted.
Utility model content：
The utility model is to provide a kind of impeller back seal structure to solve the above-mentioned problems of the prior art.
There is technical solution used by the utility model：A kind of impeller back seal structure, including impeller and seal receptacle, institute
The back for stating impeller is equipped with concave part, and seal receptacle is placed in the concave part, and running clearance is formed between impeller and seal receptacle；
The concave part is equipped with sealing ring, and seal groove is equipped on seal receptacle, and sealing ring is stretched in seal groove.
Further, the inner wall of the side wall of the sealing ring or seal groove is equipped with sealing tooth.
Further, the impeller and sealing ring are integrally formed.
The utility model has the advantages that：
1) enough effective seal lengths also be can guarantee during rotor axial play, it is ensured that sealing effect；
2) according to axial force of impeller it needs to be determined that the position of sealing tooth, obtains rational axial force of impeller.
Description of the drawings：
Fig. 1 is the utility model structure chart.
Fig. 2 is another structure chart of the utility model.
Specific embodiment：
The utility model will be further described below with reference to the accompanying drawings.
As shown in Figure 1, the utility model discloses a kind of impeller back seal structure, including impeller 1 and seal receptacle 4, in leaf
The back of wheel 1 is equipped with concave part 11, and seal receptacle 4 is placed in the concave part 11, and rotation is formed between impeller 1 and seal receptacle 4
Gap 10.
Sealing ring 2 is equipped on the concave part 11 of impeller 1, impeller 1 and sealing ring 2 are integrally formed.It is equipped on seal receptacle 4
Seal groove 5, sealing ring 2 are stretched in seal groove 5.
To be further ensured that sealing effect, sealing tooth 3 is equipped on the side wall of sealing ring 2.
In use, the axial dimension of sealing ring 2, sealing tooth 3 and seal groove 5 is determined according to rotor axial shifting amount, even if
Rotor axial play also can guarantee enough effective seal lengths.
Air pressure before sealing in impeller outlet is high, and the pressure of the working gas after sealing is low.It can root
Sealing distance a of the tooth 3 away from axis is determined according to the needs of axial force of impeller, obtains the axial force of rational impeller.
To set sealing tooth 3 (such as Fig. 2) on the inner wall of seal groove 5, sealing ring 2 is inserted into another form of the utility model
In seal groove 5 sealing structure is formed with sealing tooth 3.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, several improvement can also be made on the premise of the utility model principle is not departed from, these improvement also should be regarded as
The scope of protection of the utility model.
Claims (3)
1. a kind of impeller back seal structure, it is characterised in that：Including impeller (1) and seal receptacle (4), the back of the body of the impeller (1)
Portion is equipped with concave part (11), and seal receptacle (4) is placed in the concave part (11), and is formed with and is turned between impeller (1) and seal receptacle (4)
Dynamic gap (10)；The concave part (11) is equipped with sealing ring (2), and seal groove (5), sealing ring (2) are equipped on seal receptacle (4)
It stretches in seal groove (5).
2. impeller back seal structure as described in claim 1, it is characterised in that：The side wall or close of the sealing ring (2)
The inner wall of sealing groove (5) is equipped with sealing tooth (3).
3. impeller back seal structure as described in claim 1, it is characterised in that：The impeller (1) and sealing ring (2) one
Shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721413779.5U CN207420953U (en) | 2017-10-30 | 2017-10-30 | A kind of impeller back seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721413779.5U CN207420953U (en) | 2017-10-30 | 2017-10-30 | A kind of impeller back seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207420953U true CN207420953U (en) | 2018-05-29 |
Family
ID=62309173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721413779.5U Active CN207420953U (en) | 2017-10-30 | 2017-10-30 | A kind of impeller back seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207420953U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725468A (en) * | 2017-10-30 | 2018-02-23 | 南京磁谷科技有限公司 | A kind of impeller back seal structure |
-
2017
- 2017-10-30 CN CN201721413779.5U patent/CN207420953U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725468A (en) * | 2017-10-30 | 2018-02-23 | 南京磁谷科技有限公司 | A kind of impeller back seal structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 99, Jinxin Middle Road, Jiangning District, Nanjing City, Jiangsu Province Patentee after: Nanjing Cigu Technology Co., Ltd Address before: Nine No. 211102 Bamboo Road, Jiangning Development Zone, Nanjing, Jiangsu, 100 Patentee before: NANJING CIGU LIMITED Corp. |
|
| CP03 | Change of name, title or address |