CN202149064U - Improved shaft seal structure of boiler feed pump - Google Patents
Improved shaft seal structure of boiler feed pump Download PDFInfo
- Publication number
- CN202149064U CN202149064U CN201120256471U CN201120256471U CN202149064U CN 202149064 U CN202149064 U CN 202149064U CN 201120256471 U CN201120256471 U CN 201120256471U CN 201120256471 U CN201120256471 U CN 201120256471U CN 202149064 U CN202149064 U CN 202149064U
- Authority
- CN
- China
- Prior art keywords
- shaft
- seal structure
- boiler feed
- feed pump
- seal
- 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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- Mechanical Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an improved shaft seal structure of a boiler feed pump, which comprises a shaft sleeve sleeved on a rotating shaft in a matching mode, an auxiliary shaft sleeve is sleeved on the outer lateral portion of the shaft sleeve in a matching mode, a metal bellows mechanical sealing assembly is sleeved on the auxiliary shaft sleeve in the matching mode and pressed by a ring pressing cover installed on the position of a pump body shaft hole. The improved shaft seal structure replaces the original axial seal with end face seal of a vertical shaft, enables the whole set of the device to be stable and reliable in work, and prolongs service life.
Description
Technical field
The utility model relates to a kind of improved boiler feed pump shaft seal structure.
Background technique
Existing boiler feed water pump shaft envelope adopts packing to seal, the axle sleeve serious wear, and working life is short, is seriously restricting the ordinary production of enterprise.
Summary of the invention
The purpose of the utility model is to provide a kind of improved boiler feed pump shaft seal structure, and it is simple in structure, can improve the sealing effect of feed water pump axle head effectively, guarantees to produce and normally carries out.
The purpose of the utility model is to realize like this; A kind of improved boiler feed pump shaft seal structure; Be included in the axle sleeve that cooperates suit in the rotating shaft; The lateral part of axle sleeve cooperates suit the countershaft cover, and countershaft puts the engage sleeves installing and putting the metal bellows mechanical seal assembly, and this mechanical sealing assembly is compressed by the annular gland that is installed in pump housing axis hole place.
The utility model becomes the end face seal of original axial seal into vertical shaft, and it is simple in structure, and is cheap, not only can make the package unit stable working reliable, and prolong working life; And can improve the sealing effect of feed water pump axle head effectively, guarantee to produce and normally carry out.
Description of drawings
To combine accompanying drawing that the utility model is done further detailed explanation below.
Fig. 1 looks cross-sectional view for the master of the utility model.
Embodiment
A kind of improved boiler feed pump shaft seal structure, as shown in Figure 1, be included in the axle sleeve 6 that cooperates suit in the rotating shaft, axle sleeve 6 is installed in the rotating shaft through locking nut 4.The lateral part of axle sleeve 6 cooperates suit countershaft cover 5, and metal bellows mechanical seal assembly 2 is being put in the engage sleeves installing on the countershaft cover 5, and this mechanical sealing assembly 2 is compressed by the annular gland 1 that is installed in pump housing axis hole place.Retainer ring 3 is in order to fix countershaft cover 5.Engage sleeves is being set on pump housing inwall is being contained in the labyrinth seal 7 in the rotating shaft.Demineralized water is that friction pair provides lubricating liquid film, and labyrinth seal 7 is the effect that described end face machine seal structure plays the throttling step-down, makes the package unit stable working reliable, and prolong working life.
Claims (2)
1. improved boiler feed pump shaft seal structure; Be included in the axle sleeve that cooperates suit in the rotating shaft; It is characterized in that: the lateral part of axle sleeve cooperates suit the countershaft cover; Countershaft puts the engage sleeves installing and is putting the metal bellows mechanical seal assembly, and this mechanical sealing assembly is compressed by the annular gland that is installed in pump housing axis hole place.
2. improved boiler feed pump shaft seal structure according to claim 1 is characterized in that: engage sleeves is being set on pump housing inwall is being contained in the labyrinth seal in the rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120256471U CN202149064U (en) | 2011-07-20 | 2011-07-20 | Improved shaft seal structure of boiler feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120256471U CN202149064U (en) | 2011-07-20 | 2011-07-20 | Improved shaft seal structure of boiler feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149064U true CN202149064U (en) | 2012-02-22 |
Family
ID=45590125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120256471U Expired - Fee Related CN202149064U (en) | 2011-07-20 | 2011-07-20 | Improved shaft seal structure of boiler feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202149064U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930667A (en) * | 2017-05-26 | 2018-12-04 | 中国电建集团上海能源装备有限公司 | A kind of cooling decompression end cap of nuclear power conventional island feed pump |
-
2011
- 2011-07-20 CN CN201120256471U patent/CN202149064U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930667A (en) * | 2017-05-26 | 2018-12-04 | 中国电建集团上海能源装备有限公司 | A kind of cooling decompression end cap of nuclear power conventional island feed pump |
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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 |
Granted publication date: 20120222 Termination date: 20170720 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |