CN101666316B - Auxiliary water supply electric pump in nuclear power plant - Google Patents
Auxiliary water supply electric pump in nuclear power plant Download PDFInfo
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- CN101666316B CN101666316B CN 200810042463 CN200810042463A CN101666316B CN 101666316 B CN101666316 B CN 101666316B CN 200810042463 CN200810042463 CN 200810042463 CN 200810042463 A CN200810042463 A CN 200810042463A CN 101666316 B CN101666316 B CN 101666316B
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Abstract
The invention relates to an auxiliary water supply electric pump in a nuclear power plant, which comprises a horizontal-structure multi-stage centrifugal pump provided with a pump body in a double shell type, wherein the inside of the pump body is provided with a multi-stage segmental inner shell. The inside of the multi-stage centrifugal pump is provided with a stator component, a rotor component, a balance mechanism component, a bearing component and a shaft seal component, wherein the lower part of the pump body is provided with a pump foot; the stator component is fixed on the pump body; the rotor component comprises a pump shaft, impellers and a balance drum; the balance mechanism component is fixed on the shaft and a pump cover; the bearing component comprises a radial roller bearing and a double-direction thrust ball bearing; and the bearing component is arranged on both ends of the pump body and on the periphery of the radial roller bearing and the double-direction thrust ball bearing respectively by adopting fast-loading mechanical seal. The auxiliary water supply electric pump adopts the double-cylinder structured pump body and the self-lubricating bearing; the balance drum is arranged on the shaft reasonably, and the radial roller bearing and the thrust ball bearing are arranged on both ends of the pump shaft respectively, so the auxiliary water supply electric pump has no structural welding, has convenient maintenance, can effectively prevent a medium from leaking and polluting the environment, and the shock resistance and the maintainability of the pump are improved.
Description
Technical field:
The present invention relates to mechanical field, relate in particular to fluid conveying machine, particularly pump, a kind of specifically auxiliary water supply electric pump in nuclear power plant.
Background technique:
Stand by pump when nuclear power station adopts auxiliary feed water pump to break down as steam generator main feed pump or system water supply.For example power supply breaks down at the scene, auxiliary feed water pump adding work takes place damaged the time main feed system pipeline or main steam system pipeline.Simultaneously, under some operating mode, auxiliary feed water pump and system thereof also substitute main feed pump and system thereof and carry out work, discharge the heat release of reactor.These operating modes are: 1, the heating of unit starting and reactor coolant loop; 2, hot shutdown; 3, make reactor coolant loop be cooled to the degree that residual heat removal system can put into operation.From the view of security; When any one link of main feed system such as main feed pump, delivery (pipe) line, low-pressure feed heater system, water of condensation extraction system or condenser vacuum system break down; Auxiliary feed water pump and system thereof put into operation to discharge the reactor core after-heat immediately, can put into operation up to residual heat removal system.In the existing technology, auxiliary feed water pump adopts the mono-hull multilevel hierarchy, and the maintenance trouble must be dismantled pump barrel body and connecting pipeline during maintenance; Mono-hull pump medium is leaked the capacity befouling environment; The stage casing wall thickness of mono-hull pump is bigger, and the pump core is inside and outside can not to be expanded or shrink equably, can not satisfy the heat shock resistance requirement, and the stage casing of mono-hull pump is fastening through rod, and shock resistance is poor.
Summary of the invention:
The purpose of this invention is to provide a kind of auxiliary water supply electric pump in nuclear power plant, described this auxiliary water supply electric pump in nuclear power plant will solve that the electronic auxiliary feed water pump maintenance of the nuclear power station of available technology adopting mono-hull multilevel hierarchy inconvenience, thermo-labile impact, shock resistance are poor, the technical problem of need forced lubricating system assistant starting.
This auxiliary water supply electric pump in nuclear power plant of the present invention is made up of horizontal bivalve body multistage centrifugal pump; Inner housing in the body multistage centrifugal pump of described horizontal bivalve is sectional type; Be provided with stator module, rotor assembly, bearing unit, gland seal assembly and transmission part in the body multistage centrifugal pump of horizontal bivalve; It is characterized in that: the bottom at the horizontal center place of the pump housing of horizontal bivalve body multistage centrifugal pump is provided with the pump pin; Described stator module is made up of bearing support, cylindrical shell, pump cover, suction casing, stage casing, stator, last stator; Stator module is arranged on the pump housing, and all perpendicular to the axis of the pump housing and upwards setting, described suction port is arranged on an end of the pump housing for the suction port of the pump housing and discharge opening; Described discharge opening is arranged on the other end of the pump housing; Described rotor assembly is made up of pump shaft, impeller, balancing drum and balance set, and described impeller is arranged on the middle part of described pump shaft and is positioned at the center position of the suction port position of the pump housing, and described balancing drum is fixed on the pump shaft through distinguish snap ring, hold-down ring and snap ring cover; Balancing drum is arranged between the discharge opening of middle part and the pump housing of pump shaft; Described bearing unit is made up of bearing support, radial roller bearing, double-direction thrust ball bearing and bearing gland, and radial roller bearing, double-direction thrust ball bearing are separately positioned in the bearing support, and bearing gland is arranged on the two ends of bearing support; The pump drive end that closes on the pump shaft entry end is provided with the single-row centripetal roller bearing; The pump free end is provided with the double-direction thrust ball bearing of a secondary pairing, and described gland seal assembly is made up of the ready-package mechanical seal of two above numbers, and described ready-package mechanical seal is separately positioned on the two ends of the pump housing, the periphery of radial roller bearing and the periphery of double-direction thrust ball bearing.
Further; Described single row roller bearing is arranged in the bearing support of drive end; Be provided with the adjustment screw between the described bearing support and the pump housing; The double-direction thrust ball bearing of described pairing is arranged in the free end bearing body, is provided with the adjustment screw between described free end bearing body and the pump cover.
Further, described balancing drum is fixed on the axle through distinguish snap ring, hold-down ring and snap ring cover, and described distinguish snap ring and hold-down ring are fixed on the axle by the snap ring cover, and the snap ring cover is fastened on the pump shaft fixing through screw.
Further, be provided with the final stage stator in the pump housing, be provided with a plurality of wound gaskets between described final stage stator and the pump cover.
Further, be provided with adjustment screw feather key and pump foot pad sheet between the described pump pin pump seat and the pump housing.
Concrete, the ready-package mechanical seal among the present invention mixes up decrement when subsequent use in advance, only needs knockout screw to get final product during replacing, makes things convenient for the user, shortens the repair time, and this ready-package mechanical seal has good seal performance, long, the little advantage of consumed power of life-span.
Further, the bearing among the present invention is arranged in the bearing support, and described bearing support adopts air cooling structure.Need not extra lubrication system.
Working principle of the present invention is: because no forced lubricating system, in case after accident takes place, take place like earthquake.Can under no prelubricated situation, directly start this pump; Owing to adopt double-shell structure, when needing repairing, unclamp the pump cover bolt, directly whole taking-up of inner housing just can be keeped in repair fast; Even if the pump medium is leaked, the pump barrel body can guarantee that also leaking medium can not leak into extraneous directly befouling environment; Simultaneously, the pump barrel body has improved the rigidity of whole pump, and is stronger to supporting roles such as bearings, can satisfy the requirement of pump group frequent starting better, improves the shock resistance of pump; Inner housing can adopt than small walled, can respond thermal shock fast, makes pump work more steady.
The present invention and prior art contrast, and its effect is actively with tangible.The present invention adopts no forced lubricating system; The pump housing of the structure that employing bitubular housing can be loosed core; Balancing drum rationally is set on pump shaft, radial roller bearing and thrust ball bearing is set respectively at the pump shaft two ends; This pump need not pre-lubrication directly start, easy to maintenance, can prevent the dielectric leakage befouling environment effectively, improve the shock resistance of pump simultaneously.The rigidity of cylindrical shell has satisfied the requirement of pump group frequent starting, has improved maintainability.
Description of drawings:
Fig. 1 is the structural representation of auxiliary water supply electric pump in nuclear power plant of the present invention.
Embodiment:
As shown in Figure 1; Auxiliary water supply electric pump in nuclear power plant structure of the present invention is that horizontal, bivalve body, inner housing are the multistage centrifugal pump of sectional type; Described multistage centrifugal pump is horizontal type structure and has can the loose core pump housing 1 of type of a cylinder build; Being provided with one in the pump housing 1 of described cylinder type can the whole sectional type inner casing of extracting out, is provided with stator module, rotor assembly, bearing unit and gland seal assembly in the described multistage centrifugal pump, wherein; The bottom of the described pump housing 1 is provided with pump pin feather key 141; Described stator module is fixed on the pump housing 1, and the suction port 2 of the pump housing 1 and discharge opening 3 are all perpendicular to the axis of the pump housing 1, and described suction port 2 is arranged on an end of the pump housing 1; Described discharge opening 3 is arranged on the other end of the pump housing 1; Be provided with stator 4 and pump cover 5 in the stator module, described rotor assembly is made up of pump shaft 7, impeller 8 and balancing drum 9, the center position that described impeller 8 is arranged on the middle part of described pump shaft 7 and is positioned at the pump housing 12 positions that enter the mouth; Described balancing drum 9 is fixed on the axle 7 by distinguish snap ring 91, hold-down ring 92 and snap ring cover 93; Be arranged on the middle part of pump shaft 7 and between the discharge opening 3 of the pump housing 1 side, described bearing unit is made up of parts such as bearing support 12, radial roller bearing 10 and double-direction thrust ball bearing 11, bearing glands 13, single-row centripetal roller bearing 10 is arranged in the drive end bearing body 12; The double-direction thrust ball bearing 11 of one secondary pairing is arranged in the free end bearing body 12; Described gland seal assembly adopts ready-package formula mechanical seal 15, and ready-package formula mechanical seal 15 is made up of a plurality of boxlike mechanical seals 12, and described ready-package formula mechanical seal 15 is separately positioned on the two ends of the pump housing 1, the periphery of radial roller bearing 10, the periphery of double-direction thrust ball bearing 11.
Further; Single-row centripetal roller bearing 10 is arranged in the bearing block bearing body 12; Be provided with adjustment ring 13, screw 16 between this bearing block bearing body and the pump housing 1; The double-direction thrust ball bearing 11 of pairing is arranged in another bearing block bearing body 12, is provided with adjustment ring 1,3 screws 16 between bearing block bearing body 12 and the pump cover.
Further, described balancing drum 9 is fixed on the pump shaft 7 by distinguish snap ring 91, hold-down ring 92 and snap ring cover 93, and described snap ring cover 93 is fastened on the pump shaft 7 through screw.
Further, be provided with the final stage stator in the pump housing 1, be provided with a plurality of wound gasket belleville springs between described final stage stator and the pump cover 5.
Further, be provided with adjustment screw feather key 141 and pump foot pad sheet between the pump pin pump seat 14 and the pump housing 1.
Pump cover 5 is fixed on the pump housing 1 through bolt 6.
Claims (6)
1. auxiliary water supply electric pump in nuclear power plant; Constitute by horizontal bivalve body multistage centrifugal pump; Inner housing in the body multistage centrifugal pump of described horizontal bivalve is sectional type; Be provided with stator module, rotor assembly, bearing unit, gland seal assembly and transmission part in the body multistage centrifugal pump of horizontal bivalve; It is characterized in that: the bottom at the horizontal center place of the pump housing of horizontal bivalve body multistage centrifugal pump is provided with the pump pin, and described stator module is made up of bearing support, cylindrical shell, pump cover, suction casing, stage casing, stator, final stage stator, and stator module is arranged on the pump housing; The suction port of the pump housing and discharge opening are all perpendicular to the axis of the pump housing and upwards setting; Described suction port is arranged on an end of the pump housing, and described discharge opening is arranged on the other end of the pump housing, and described rotor assembly is made up of pump shaft, impeller and balancing drum; Described impeller is arranged on the middle part of described pump shaft and is positioned at the center position of the suction port position of the pump housing; Described balancing drum is fixed on the pump shaft through distinguish snap ring, hold-down ring and snap ring cover, and balancing drum is arranged between the discharge opening of middle part and the pump housing of pump shaft, and described bearing unit is made up of bearing support, radial roller bearing, double-direction thrust ball bearing and bearing gland; Radial roller bearing, double-direction thrust ball bearing are separately positioned in the bearing support; Bearing gland is arranged on the two ends of bearing support, and radial roller bearing is arranged on the pump drive end that closes on the pump shaft entry end, and the pump free end is provided with the double-direction thrust ball bearing of a secondary pairing; Described gland seal assembly is made up of the ready-package mechanical seal of two above numbers, and described ready-package mechanical seal is separately positioned on the two ends of the pump housing, the periphery of radial roller bearing and the periphery of double-direction thrust ball bearing.
2. auxiliary water supply electric pump in nuclear power plant as claimed in claim 1 is characterized in that: described bearing support adopts air cooling structure.
3. auxiliary water supply electric pump in nuclear power plant as claimed in claim 1; It is characterized in that: described radial roller bearing is arranged in the bearing support of drive end; Be provided with the adjustment screw between the described bearing support and the pump housing; The double-direction thrust ball bearing of described pairing is arranged in the free end bearing body, is provided with the adjustment screw between described free end bearing body and the pump cover.
4. auxiliary water supply electric pump in nuclear power plant as claimed in claim 1 is characterized in that: described distinguish snap ring and hold-down ring are fixed on the pump shaft by the snap ring cover, and the snap ring cover is fastened on the pump shaft through screw.
5. auxiliary water supply electric pump in nuclear power plant as claimed in claim 1 is characterized in that: be provided with a plurality of wound gaskets between described final stage stator and the pump cover.
6. auxiliary water supply electric pump in nuclear power plant as claimed in claim 1 is characterized in that: be provided with adjustment screw feather key and pump foot pad sheet between the described pump pin pump seat and the pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810042463 CN101666316B (en) | 2008-09-03 | 2008-09-03 | Auxiliary water supply electric pump in nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810042463 CN101666316B (en) | 2008-09-03 | 2008-09-03 | Auxiliary water supply electric pump in nuclear power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666316A CN101666316A (en) | 2010-03-10 |
| CN101666316B true CN101666316B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810042463 Active CN101666316B (en) | 2008-09-03 | 2008-09-03 | Auxiliary water supply electric pump in nuclear power plant |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102476275B (en) * | 2010-11-23 | 2013-12-04 | 中国二十冶集团有限公司 | Segmental installation method for end cover of autogenous mill barrel |
| CN102116319B (en) * | 2010-12-30 | 2012-05-23 | 上海阿波罗机械股份有限公司 | Condensate pump used in nuclear power station |
| CN102588298A (en) * | 2012-03-13 | 2012-07-18 | 高二丑 | Axial force self-balancing multi-stage electric submersible pump |
| CN112901511B (en) * | 2021-01-29 | 2022-08-09 | 绍兴市雪花机电有限公司 | Variable frequency pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5445494A (en) * | 1993-11-08 | 1995-08-29 | Bw/Ip International, Inc. | Multi-stage centrifugal pump with canned magnetic bearing |
| CN2304770Y (en) * | 1997-03-15 | 1999-01-20 | 沈阳化工泵制造厂 | Double casing and multi-stage eccentric pump for light hydrocarbons |
| CN2581736Y (en) * | 2002-09-24 | 2003-10-22 | 浙江科尔泵业股份有限公司 | Ultrahigh pressure low specific speed multi-stage centrifugal pump with double case and rigid shaft |
| CN1629496A (en) * | 2003-12-16 | 2005-06-22 | 阳江市新粤华不锈钢泵有限公司 | Vertical multi-stage centrifugal pump shaped by stamping and welding |
| CN1888442A (en) * | 2006-07-31 | 2007-01-03 | 上海凯泉泵业（集团）有限公司 | Improved multi-stage centrifugal pump |
| CN201330749Y (en) * | 2008-09-03 | 2009-10-21 | 上海阿波罗机械制造有限公司 | Water supply electric pump |
-
2008
- 2008-09-03 CN CN 200810042463 patent/CN101666316B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5445494A (en) * | 1993-11-08 | 1995-08-29 | Bw/Ip International, Inc. | Multi-stage centrifugal pump with canned magnetic bearing |
| CN2304770Y (en) * | 1997-03-15 | 1999-01-20 | 沈阳化工泵制造厂 | Double casing and multi-stage eccentric pump for light hydrocarbons |
| CN2581736Y (en) * | 2002-09-24 | 2003-10-22 | 浙江科尔泵业股份有限公司 | Ultrahigh pressure low specific speed multi-stage centrifugal pump with double case and rigid shaft |
| CN1629496A (en) * | 2003-12-16 | 2005-06-22 | 阳江市新粤华不锈钢泵有限公司 | Vertical multi-stage centrifugal pump shaped by stamping and welding |
| CN1888442A (en) * | 2006-07-31 | 2007-01-03 | 上海凯泉泵业（集团）有限公司 | Improved multi-stage centrifugal pump |
| CN201330749Y (en) * | 2008-09-03 | 2009-10-21 | 上海阿波罗机械制造有限公司 | Water supply electric pump |
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| CN101666316A (en) | 2010-03-10 |
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