CN202597206U - Shaft seal device of charging pump for nuclear power plant - Google Patents
Shaft seal device of charging pump for nuclear power plant Download PDFInfo
- Publication number
- CN202597206U CN202597206U CN 201220118653 CN201220118653U CN202597206U CN 202597206 U CN202597206 U CN 202597206U CN 201220118653 CN201220118653 CN 201220118653 CN 201220118653 U CN201220118653 U CN 201220118653U CN 202597206 U CN202597206 U CN 202597206U
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- Prior art keywords
- ring
- face
- axle sleeve
- sleeve
- pressing plate
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- Expired - Lifetime
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Abstract
The utility model discloses a shaft seal device of a charging pump for a nuclear power plant, which can reliably prevent leakage of a medium. The shaft seal device comprises a mechanical seal shaft sleeve, a pressure plate, a rotating ring, a fixed ring seat, a fixed ring, a pressure ring, a plurality of springs and a throttle bushing. The mechanical seal shaft sleeve comprises a shaft sleeve body and a sleeve disk connected with the back end of the shaft sleeve body, and the mechanical seal shaft sleeve is fixedly sheathed on a rotating shaft through a locking disk; the pressure plate comprises a flange and a sleeve connected on the back end surface of the flange, and the pressure plate is fixed on the front end surface of a pump head; the rotating ring is fixed in a ring groove of the mechanical seal shaft sleeve; the fixed ring seat is mounted in an inner cavity of the sleeve of the pressure plate in an axially movable manner; the fixed ring is mounted in the inner cavity of the sleeve of the pressure plate and fixed on the back end surface of the fixed ring seat; the pressure ring is sheathed at the outer end of the fixed ring and fixed on the back end surface of the fixed ring seat; a plurality of the springs are placed in blind holes of the pressure plate one by one, and the back ends of the plurality of the springs are connected on the front end surface of the fixed ring seat so as to enable the back end surface of the fixed ring to be always jointed with the front end surface of the rotating ring; and the throttle bushing is mounted in a concave pit of the pressure plate.
Description
Technical field
The utility model relates on a kind of used in nuclear power station and fills pump, be specifically related to a kind of used in nuclear power station on fill the gland seal device of pump.
Background technique
On fill the important component part that pump is cvcs (RCV), the major function of filling pump on this is following:
1) to reactor coolant loop water-filling stream is provided, thereby keeps normal liquid level in the voltage stabilizer;
2) provide cooling water, these current also to play for a sealing of three reactor coolant pumps and prevent the effect of high temperature coolant through seal leakage;
3), prevent the exposed of the middle reactor core of dehydration incident (LOCA) as safe injection pump.
Fill pump in nuclear power station, using at present and be generally horizontal, double hulled multistage centrifugal pump.The two ends of this multistage centrifugal pump all will be provided with mechanical seal in the existing technology; Particularly the pressure that bears of the mechanical seal of high voltage terminal wants big relatively; Two ends all will be provided with external mechanical seal rinsing pipeline, and therefore general volume is bigger, and it is big to take the factory building space.
Summary of the invention
The purpose of the utility model is in order to overcome the deficiency of existing technology, provide a kind of used in nuclear power station on fill the gland seal device of pump, it can prevent reliably that medium from leaking, good sealing effect and easy accessibility have reduced maintenance load.
Realize the technological scheme of above-mentioned purpose: the gland seal device that fills pump on a kind of used in nuclear power station; Be installed in the rotating shaft and be arranged in the mechanical seal chamber of filling the pump head of pump on said; Said gland seal device comprises machine envelope axle sleeve, pressing plate, rotating ring, stationary seat, stationary ring, pressure ring, some springs and nockbush, wherein:
Said machine envelope axle sleeve comprises that an axle sleeve body and is connected the cover dish of axle sleeve body rear end, and the front-end face of cover dish is provided with an annular groove, and this machine envelope axle sleeve is sleeved in the rotating shaft through locking plate regularly;
Said pressing plate comprises a flange and is connected the sleeve on the flange ear end face, and the front-end face of flange is provided with a pit, and the inner cavity surface of this sleeve is high outside and low outside one-level step surface, on the step surface of the outside of sleeve, offers some blind holes in uniform way; This pressing plate is fixed on the front-end face of said pump head with this outer mode of cover dish external, that sleeve is enclosed within said machine envelope axle sleeve with gap of axle sleeve that its flange is enclosed within said machine envelope axle sleeve with gap;
Said rotating ring is fixed in the annular groove of said machine envelope axle sleeve;
Said stationary seat can be installed in the inner chamber of the sleeve of said pressing plate with moving axially;
Said stationary ring be installed in said pressing plate sleeve inner chamber and be fixed on the ear end face of said stationary seat;
Said pressure ring is sleeved on the outer end of said stationary ring and is fixed on the ear end face of said stationary seat;
Said some springs are placed in the blind hole of said pressing plate one by one, and the rear end of these some springs is connected on the front-end face of said stationary seat, so that the ear end face of said stationary ring is fitted with the front-end face of said rotating ring all the time;
Said nockbush is installed in the pit of said pressing plate.
Fill the gland seal device of pump on the above-mentioned used in nuclear power station, wherein, also offer the flushing hole that is communicated with said barrel bore on the ear end face of the flange of said pressing plate.
Fill the gland seal device of pump on the above-mentioned used in nuclear power station, wherein, the forward outer surface of said axle sleeve body is provided with a draw-in groove, in this draw-in groove, clamps a location piece, so that said pressing plate is resisted against on the ear end face of said location piece.
Fill the gland seal device of pump on the above-mentioned used in nuclear power station; Wherein, between said machine envelope axle sleeve and the said rotating shaft, between said pressing plate and said pump head and the stationary seat, said rotating ring and said machine seals between the axle sleeve, be respectively equipped with O-ring seals between said stationary ring and said stationary seat and the pressure ring.
Fill the technological scheme of the gland seal device of pump on the used in nuclear power station of the utility model, adopt each component to be assembled in advance, be installed in again in the rotating shaft, made things convenient for the installation and removal of pump group.It relies on the pressure of sealing medium on the surface of contact of rotating ring and stationary ring, to produce suitable impacting force; Both ends of the surface appropriateness is fitted, make keep all the time between the surface of contact of rotating ring and stationary ring one deck as thin as a wafer liquid film and reach the purpose of sealing, be provided with nockbush in addition; Even mechanical seal was lost efficacy; Therefore the shaft sealing leakage amount of pump can prevent reliably that medium from leaking, good sealing effect less than minimum requirements.
Description of drawings
Fig. 1 is for filling the structural representation of the gland seal device of pump on the used in nuclear power station of the utility model.
Embodiment
In order to understand the technological scheme of the utility model better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1, fill the gland seal device of pump on a kind of used in nuclear power station of the utility model, be installed in the rotating shaft 10 and be arranged in the mechanical seal chamber of the pump head 20 that fills pump.Gland seal device comprises machine envelope axle sleeve 1, pressing plate 2, rotating ring 3, stationary seat 4, stationary ring 5, pressure ring 6, some springs 7, nockbush 8, location piece 9 and locking plate 11, wherein:
Machine envelope axle sleeve 1 comprises that an axle sleeve body and is connected the cover dish of axle sleeve body rear end, and the front-end face of cover dish is provided with an annular groove, and the forward outer surface of axle sleeve body is provided with a draw-in groove, and this machine envelope axle sleeve is sleeved in the rotating shaft 10 through locking plate 11 regularly;
Rotating ring 3 is fixed in the annular groove of machine envelope axle sleeve 1, to rotate with rotating shaft 10;
Some springs 7 are placed in the blind hole of pressing plate 2 one by one, and the rear end of these some springs 7 is connected on the front-end face of stationary seat 4, so that the ear end face of stationary ring 5 is fitted with the front-end face of rotating ring 3 all the time;
Nockbush 8 is installed in the pit of pressing plate 2 through radial location pin 80;
Between the inner cavity surface and rotating shaft 10 of machine envelope axle sleeve 1, between the flange ear end face and pump head 20 of pressing plate 2, between the sleeve outer surface and pump head 20 of pressing plate 2, between the inner cavity surface and stationary seat 4 of the sleeve of pressing plate 2, the outer surface and the machine of rotating ring 3 seal between the axle sleeve 1, between the front-end face and stationary seat 4 of stationary ring 5, be respectively equipped with O-ring seals 12 between the outer surface of stationary ring 5 and the pressure ring 6.
The working principle of filling the gland seal device of pump on the utility model is: in the pump operation process; In the chamber that the mechanical seal chamber of pump head 20 and pressing plate 2 constitute, can form to be full of and have the certain pressure fed sheet of a media; Because the both ends of the surface area that rotating ring 3 is stressed does not wait; Can form impacting force, and stationary ring 5 fits the surface of contact appropriateness that forms between rotating ring 3 and the stationary ring 5 through spring 7, keeps the purpose that one deck liquid film as thin as a wafer reaches sealing between this surface of contact thereby so make to stationary ring 5.
Also offer the flushing hole 22 that is communicated with barrel bore on the ear end face of the flange of pressing plate 2; Be communicated with the flushing hole of offering on the pump head 20; The outside need not be provided with flushing line; And be furnished with cyclone hydraulic separators, and be used for the impurity and the unclean suspended matter of medium are separated effectively, clean medium is used for the flushing of the surface of contact of rotating ring 3 and stationary ring 5 and the heat of taking away generation.
In addition, after rotating ring 3 and stationary ring 5 lost efficacy, nockbush 8 can reduce the leakage rate of mechanical seal effectively, guaranteed that the maximum leakage amount is less than minimum requirements.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model; As long as in the connotation scope of the utility model, all will drop in claims scope of the utility model the above embodiment's variation, modification.
Claims (4)
- A used in nuclear power station on fill the gland seal device of pump; Be installed in the rotating shaft and be arranged in the mechanical seal chamber of filling the pump head of pump on said; Said gland seal device comprises machine envelope axle sleeve, pressing plate, rotating ring, stationary seat, stationary ring, pressure ring, some springs and nockbush, it is characterized in thatSaid machine envelope axle sleeve comprises that an axle sleeve body and is connected the cover dish of axle sleeve body rear end, and the front-end face of cover dish is provided with an annular groove, and this machine envelope axle sleeve is sleeved in the rotating shaft through locking plate regularly;Said pressing plate comprises a flange and is connected the sleeve on the flange ear end face, and the front-end face of flange is provided with a pit, and the inner cavity surface of this sleeve is high outside and low outside one-level step surface, on the step surface of the outside of sleeve, offers some blind holes in uniform way; This pressing plate is fixed on the front-end face of said pump head with this outer mode of cover dish external, that sleeve is enclosed within said machine envelope axle sleeve with gap of axle sleeve that its flange is enclosed within said machine envelope axle sleeve with gap;Said rotating ring is fixed in the annular groove of said machine envelope axle sleeve;Said stationary seat can be installed in the inner chamber of the sleeve of said pressing plate with moving axially;Said stationary ring be installed in said pressing plate sleeve inner chamber and be fixed on the ear end face of said stationary seat;Said pressure ring is sleeved on the outer end of said stationary ring and is fixed on the ear end face of said stationary seat;Said some springs are placed in the blind hole of said pressing plate one by one, and the rear end of these some springs is connected on the front-end face of said stationary seat, so that the ear end face of said stationary ring is fitted with the front-end face of said rotating ring all the time;Said nockbush is installed in the pit of said pressing plate.
- Used in nuclear power station according to claim 1 on fill the gland seal device of pump, it is characterized in that, also offer the flushing hole that is communicated with said barrel bore on the ear end face of the flange of said pressing plate.
- Used in nuclear power station according to claim 1 on fill the gland seal device of pump, it is characterized in that the forward outer surface of said axle sleeve body is provided with a draw-in groove, in this draw-in groove, clamp a location piece, so that said pressing plate is resisted against on the ear end face of said location piece.
- Used in nuclear power station according to claim 1 on fill the gland seal device of pump; It is characterized in that, between said machine envelope axle sleeve and the said rotating shaft, between said pressing plate and said pump head and the stationary seat, said rotating ring and said machine seals between the axle sleeve, be respectively equipped with O-ring seals between said stationary ring and said stationary seat and the pressure ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118653 CN202597206U (en) | 2012-03-27 | 2012-03-27 | Shaft seal device of charging pump for nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220118653 CN202597206U (en) | 2012-03-27 | 2012-03-27 | Shaft seal device of charging pump for nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202597206U true CN202597206U (en) | 2012-12-12 |
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ID=47314753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220118653 Expired - Lifetime CN202597206U (en) | 2012-03-27 | 2012-03-27 | Shaft seal device of charging pump for nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202597206U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564788A (en) * | 2015-01-12 | 2015-04-29 | 大连华阳密封股份有限公司 | Dry gas seal for back pressure prevention pump used in medium which contains suspended solids |
| CN106439036A (en) * | 2016-11-09 | 2017-02-22 | 上海电气凯士比核电泵阀有限公司 | Fluid dynamic pressure type mechanical sealing structure |
| CN108724060A (en) * | 2017-11-13 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump mechanical seal maintenance bearing and its application method |
| CN114576195A (en) * | 2022-04-28 | 2022-06-03 | 中密控股股份有限公司 | Novel compensation seal assembly for secondary seal of static pressure shaft seal of nuclear main pump |
-
2012
- 2012-03-27 CN CN 201220118653 patent/CN202597206U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564788A (en) * | 2015-01-12 | 2015-04-29 | 大连华阳密封股份有限公司 | Dry gas seal for back pressure prevention pump used in medium which contains suspended solids |
| CN106439036A (en) * | 2016-11-09 | 2017-02-22 | 上海电气凯士比核电泵阀有限公司 | Fluid dynamic pressure type mechanical sealing structure |
| CN108724060A (en) * | 2017-11-13 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump mechanical seal maintenance bearing and its application method |
| CN108724060B (en) * | 2017-11-13 | 2023-10-20 | 江苏核电有限公司 | Mechanical seal maintenance support for reactor coolant pump and application method of mechanical seal maintenance support |
| CN114576195A (en) * | 2022-04-28 | 2022-06-03 | 中密控股股份有限公司 | Novel compensation seal assembly for secondary seal of static pressure shaft seal of nuclear main pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |