CN202117974U - Silicon carbide mechanical seal device for feed pump - Google Patents
Silicon carbide mechanical seal device for feed pump Download PDFInfo
- Publication number
- CN202117974U CN202117974U CN2011201811890U CN201120181189U CN202117974U CN 202117974 U CN202117974 U CN 202117974U CN 2011201811890 U CN2011201811890 U CN 2011201811890U CN 201120181189 U CN201120181189 U CN 201120181189U CN 202117974 U CN202117974 U CN 202117974U
- Authority
- CN
- China
- Prior art keywords
- rotating seat
- axle sleeve
- mechanical seal
- silicon carbide
- seal device
- 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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Abstract
The utility model discloses a silicon carbide mechanical seal device for a feed pump, comprising a pressing cover (2) fixed with a pump body (1), a rotating seat (4) sleeving a shaft sleeve (3), a seal moving ring (5) in a close-fitting with the rotating seat (4), a seal static ring (6) which sleeves the shaft sleeve (3) and in a circumferential spacing with the pressing cover (2), and a compression spring (6) disposed between the rotating seat (4) and the shaft sleeve (3). The seal moving ring (5) is in a press fit with the seal static ring (7) through the compression spring (5). A shift fork driving structure for circumferential linkage is disposed between the rotating seat (4) and the shaft sleeve (3). The silicon carbide mechanical seal device ensures the circumferential driving performance of the shaft sleeve and the rotating seat, ensures the mechanical seal, and has a convenient assembling.
Description
Technical field
The utility model relates to a kind of mechanical seal device, specifically is that a kind of feed water pump that is used for nuclear power plant reactor is used the silicon carbide mechanical seal device.
Background technique
The major function of pressurized-water reactor nuclear power plant main feed system is with temperature, and steam generator is delivered in the feedwater that pressure and water quality are qualified, and utilizes the water supply system regulatory function that steam generator water level is maintained given range.It is guarantee the nuclear island safe operation with the carbonated drink quality the important process system.The nuclear power plant reactor feed water pump all is provided with mechanical seal device, the gland that this mechanical seal device comprises and the pump housing is fixing, socket and circumferentially spacing the rotating seat on the axle sleeve, close-fitting the sealing rotating ring on the rotating seat, be socketed on the axle sleeve and circumferentially spacing at the stationary seal ring on the gland, be located at the holddown spring between sealing seat and the axle sleeve; Said sealing rotating ring is force-fitted on the stationary seal ring through holddown spring.Sealing rotating ring in this structure rotates along with the rotation of pump shaft, and stationary seal ring forms the sealing flour milling with the sealing rotating ring and realizes pump inside and extraneous mechanical seal.
There is following shortcoming in the feed water pump of above existing technology with the silicon carbide mechanical seal device: at present because rotating seat is to be connected through a plurality of radially Cock screws with axle sleeve; Make both circumferentially spacing effects that reaches; This screw is after working long hours; Might become flexible, cause axle sleeve can't drive rotating seat, mechanical seal was lost efficacy; Because the space between the pump housing and the rotating seat is less, it is inconvenient that Cock screw is installed again, from but brought inconvenience for whole mechanical seal device assembling.
The model utility content
The technical problem that the utility model will solve is to provide a kind of axle sleeve and the circumferential driven nature of rotating seat, assurance mechanical seal property, feed water pump easy to assembly of guaranteeing to use the silicon carbide mechanical seal device.
The technological scheme of the utility model is; A kind of reactor feedwater pump mechanical seal device with following structure is provided, comprise and gland that the pump housing is fixing, be socketed in rotating seat on the axle sleeve, close-fitting the sealing rotating ring on the rotating seat, be socketed on the axle sleeve and circumferentially spacing at the stationary seal ring on the gland, be located at the holddown spring between sealing seat and the axle sleeve; Said sealing rotating ring is force-fitted on the stationary seal ring through holddown spring, is provided with between said rotating seat and the axle sleeve to be used for the circumferentially shift fork driving structure of interlock.
Said shift fork driving structure is meant that the outer wall of said axle sleeve is provided with a plurality of radial grooves that distribute vertically, and the inwall of said rotating seat is provided with the radial projection that is embedded into corresponding radial groove one by one.
After adopting said structure; The utility model compared with prior art; Have the following advantages: be used for the circumferentially shift fork driving structure of interlock owing to be provided with between said rotating seat and the axle sleeve, this shift fork driving structure can guarantee the circumferential spacing property of rotating seat and axle sleeve, after long-term the use; Can not become flexible or come off yet, can guarantee mechanical seal property; So also can save original Cock screw, make easy to assembly.
Description of drawings
Accompanying drawing 1 is the structural representation of the feed water pump of the utility model with the silicon carbide mechanical seal device.
Accompanying drawing 2 is structural representations of axle sleeve.
Accompanying drawing 3 is structural representations of rotating seat.
Shown in the figure, 1, the pump housing, 2, gland, 3, axle sleeve, 3.1, radial groove, 4, rotating seat, 4.1, radial projection, 5, the sealing rotating ring, 6, holddown spring, 7, stationary seal ring.
Embodiment
Be described further with the silicon carbide mechanical seal device below in conjunction with the feed water pump of accompanying drawing the utility model.
Like Fig. 1, Fig. 2, shown in Figure 3; The utility model discloses a kind of feed water pump and use the silicon carbide mechanical seal device, comprise and gland 2 that the pump housing 1 is fixing, be socketed in rotating seat 4 on the axle sleeve 3, close-fitting the sealing rotating ring 5 on the rotating seat 4, be socketed on the axle sleeve 3 and circumferentially spacing at the stationary seal ring on the gland 26, be located at the holddown spring 6 between rotating seat 4 and the axle sleeve 3; Said sealing rotating ring 5 is force-fitted on the stationary seal ring 7 through holddown spring 6, is provided with between said rotating seat 4 and the axle sleeve 3 to be used for the circumferentially shift fork driving structure of interlock.
Said shift fork driving structure is meant that the outer wall of said axle sleeve 3 is provided with a plurality of radial grooves 3.1 that distribute vertically, and the inwall of said rotating seat 4 is provided with the radial projection 4.1 that is embedded into corresponding radial groove 3.1 one by one.After the installation, this radial projection 4.1 is embedded in the corresponding radial groove 3.1, circumferentially carries out spacingly, and rotating seat 4 still can slide with axle sleeve 3 to axial.
Claims (2)
1. a feed water pump is used the silicon carbide mechanical seal device, comprise and gland (2) that the pump housing (1) is fixing, be socketed in rotating seat (4) on the axle sleeve (3), close-fitting at the sealing rotating ring (5) on the rotating seat (4), be socketed in that axle sleeve (3) is gone up and circumferentially spacing at the stationary seal ring (6) on the gland (2), be located at the holddown spring (6) between rotating seat (4) and the axle sleeve (3); Said sealing rotating ring (5) is force-fitted on the stationary seal ring (7) through holddown spring (6), it is characterized in that: be provided with the shift fork driving structure that is used for circumferential interlock between said rotating seat (4) and the axle sleeve (3).
2. feed water pump according to claim 1 is used the silicon carbide mechanical seal device; It is characterized in that: said shift fork driving structure is meant; The outer wall of said axle sleeve (3) is provided with a plurality of radial grooves (3.1) that distribute vertically, and the inwall of said rotating seat (4) is provided with the radial projection (4.1) that is embedded into corresponding radial groove (3.1) one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201811890U CN202117974U (en) | 2011-05-27 | 2011-05-27 | Silicon carbide mechanical seal device for feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201811890U CN202117974U (en) | 2011-05-27 | 2011-05-27 | Silicon carbide mechanical seal device for feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117974U true CN202117974U (en) | 2012-01-18 |
Family
ID=45459043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201811890U Expired - Fee Related CN202117974U (en) | 2011-05-27 | 2011-05-27 | Silicon carbide mechanical seal device for feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117974U (en) |
-
2011
- 2011-05-27 CN CN2011201811890U patent/CN202117974U/en not_active Expired - Fee Related
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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: 20120118 Termination date: 20160527 |