CN201330749Y - Water supply electric pump - Google Patents
Water supply electric pump Download PDFInfo
- Publication number
- CN201330749Y CN201330749Y CNU2008201526828U CN200820152682U CN201330749Y CN 201330749 Y CN201330749 Y CN 201330749Y CN U2008201526828 U CNU2008201526828 U CN U2008201526828U CN 200820152682 U CN200820152682 U CN 200820152682U CN 201330749 Y CN201330749 Y CN 201330749Y
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- pump
- bearing
- pump housing
- shaft
- thrust ball
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- Expired - Lifetime
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Abstract
A water supply electric pump comprises a multistage centrifugal pump. The multistage centrifugal pump adopts a horizontal structure and is provided with a double-casing pump body, and a multistage sectional type inner casing is arranged in the pump body. A stator component, a rotor component, a balance mechanism component, a bearing component and shaft seal components are arranged in the multistage centrifugal pump; pump feet are arranged at the lower part of the pump body; the stator component is fixed on the pump body; the rotor component comprises a pump shaft, an impeller and a balance drum; the balance mechanism component is fixed on a shaft and a pump cover; the bearing component comprises a radial roller bearing and a two-way thrust ball bearing; and the shaft seal components adopt a fast-assembly mechanical sealing method to be arranged at two ends of the pump body, as well as the periphery of the radial roller bearing and the two-way thrust ball bearing respectively. The water supply electric pump adopts the pump body with a dual-cylinder-body structure, the bearing is self-lubricated, the balance drum is reasonably arranged on the shaft, and the radial roller bearing and the thrust ball bearing are arranged at the two ends of the pump shaft respectively, thereby having no structural welding, realizing convenient maintenance, effectively preventing dielectric leakage and environmental pollution, and improving the shock resistance and the maintainability of the pump.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to fluid conveying machine, particularly pump, a kind of specifically feedwater motor-drive pump.
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 immediately to discharge the reactor core after-heat, can put into operation up to residual heat removal system.In the prior art, 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 by rod, and shock resistance is poor.
The model utility content:
The purpose of this utility model provides a kind of feedwater motor-drive pump, and the electronic auxiliary feed water pump of the nuclear power station that described this feedwater motor-drive pump will solve available technology adopting mono-hull multilevel hierarchy maintenance inconvenience, thermo-labile impact, shock resistance are poor, the technical problem of need forced lubricating system assistant starting.
This feedwater motor-drive pump of the present utility model is made 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 in the body multistage centrifugal pump of horizontal bivalve, rotor assembly, bearing unit, gland seal assembly and transmission part, it is characterized in that: the bottom of the horizontal center of the pump housing of horizontal bivalve body multistage centrifugal pump is provided with the pump pin, described stator module is by bearing support, cylindrical shell, pump cover, suction casing, the stage casing, stator, the end stator is formed, 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, described discharge opening is arranged on the other end of the pump housing, described rotor assembly is by pump shaft, impeller, balancing drum and balance set constitute, 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 by the distinguish snap ring, hold-down ring and snap ring cover are fixed on the pump shaft, balancing drum is arranged between the discharge opening of the middle part of pump shaft and the pump housing, described bearing unit is by bearing support, radial roller bearing, double-direction thrust ball bearing and bearing gland constitute, radial roller bearing, double-direction thrust ball bearing is separately positioned in the bearing support, 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, described gland seal assembly is made 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 by 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 by 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, ready-package mechanical seal in the utility model mixes up decrement when standby in advance, only needs knockout screw to get final product during replacing, makes things convenient for the user, shorten the repair time, this ready-package mechanical seal has good seal performance, long, the little advantage of consumed power of life-span.
Further, the bearing in the utility model is arranged in the bearing support, and described bearing support adopts air cooling structure.Need not extra lubrication system.
Working principle of the present utility model is: because no forced lubricating system, in case after accident takes place, take place as 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 thick than thin-walled, can respond thermal shock fast, makes pump work more steady.
The utility model and prior art contrast, and its effect is actively with tangible.The utility model 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 a kind of motor-drive pump that feeds water of the present utility model.
Embodiment:
As shown in Figure 1, a kind of feedwater motor-drive pump structure of the present utility model is horizontal, the bivalve body, inner housing is 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, be provided with stator module in the described multistage centrifugal pump, rotor assembly, bearing unit and gland seal assembly, 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, the suction port 2 of the pump housing 1 and discharge opening 3 are all perpendicular to the axis of the pump housing 1, 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 by pump shaft 7, impeller 8 and balancing drum 9 constitute, 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 by distinguish snap ring 91, hold-down ring 92 and snap ring cover 93 are fixed on the axle 7, be arranged on the middle part of pump shaft 7 and side between the discharge opening 3 of the pump housing 1, described bearing unit is by bearing support 12, radial roller bearing 10 and double-direction thrust ball bearing 11, bearing gland 13 parts such as grade constitute, 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, ready-package formula mechanical seal 15 is made 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 between this bearing block bearing body and the pump housing 1 and adjust ring 13, screw 16, the double-direction thrust ball bearing 11 of pairing is arranged in another bearing block bearing body 12, is provided with between bearing block bearing body 12 and the pump cover to adjust ring 1,3 screws 16.
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 by 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.
Claims (6)
1. feedwater motor-drive pump, 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 in the body multistage centrifugal pump of horizontal bivalve, rotor assembly, bearing unit, gland seal assembly and transmission part, it is characterized in that: the bottom of the horizontal center of the pump housing of horizontal bivalve body multistage centrifugal pump is provided with the pump pin, described stator module is by bearing support, cylindrical shell, pump cover, suction casing, the stage casing, stator, the end stator is formed, 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, described discharge opening is arranged on the other end of the pump housing, described rotor assembly is by pump shaft, impeller, balancing drum and balance set constitute, 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 by the distinguish snap ring, hold-down ring and snap ring cover are fixed on the pump shaft, balancing drum is arranged between the discharge opening of the middle part of pump shaft and the pump housing, described bearing unit is by bearing support, radial roller bearing, double-direction thrust ball bearing and bearing gland constitute, radial roller bearing, double-direction thrust ball bearing is separately positioned in the bearing support, 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, described gland seal assembly is made 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. a kind of feedwater motor-drive pump as claimed in claim 1, it is characterized in that: described bearing is arranged in the bearing support, and described bearing support adopts air cooling structure.
3. a kind of feedwater motor-drive pump as claimed in claim 1, it is characterized in that: 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.
4. a kind of feedwater motor-drive pump as claimed in claim 1, it is characterized in that: described balancing drum is fixed on the axle by distinguish snap ring, hold-down ring and snap ring cover, 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 by screw.
5. a kind of feedwater motor-drive pump as claimed in claim 1 is characterized in that: 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.
6. a kind of feedwater motor-drive pump as claimed in claim 1 is characterized in that: be provided with between the described pump pin pump seat and the pump housing and adjust screw feather key and pump foot pad sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201526828U CN201330749Y (en) | 2008-09-03 | 2008-09-03 | Water supply electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201526828U CN201330749Y (en) | 2008-09-03 | 2008-09-03 | Water supply electric pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201330749Y true CN201330749Y (en) | 2009-10-21 |
Family
ID=41224129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201526828U Expired - Lifetime CN201330749Y (en) | 2008-09-03 | 2008-09-03 | Water supply electric pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201330749Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666316B (en) * | 2008-09-03 | 2012-10-10 | 上海阿波罗机械股份有限公司 | Auxiliary water supply electric pump in nuclear power plant |
| CN103195759A (en) * | 2013-04-12 | 2013-07-10 | 上海阿波罗机械股份有限公司 | Main feed pump |
| CN105164424A (en) * | 2012-12-21 | 2015-12-16 | 诺沃皮尼奥内股份有限公司 | Multistage compressor and method for operating a multistage compressor |
| CN107514384A (en) * | 2017-09-27 | 2017-12-26 | 上海阿波罗机械股份有限公司 | Emergency feedwater pump |
-
2008
- 2008-09-03 CN CNU2008201526828U patent/CN201330749Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666316B (en) * | 2008-09-03 | 2012-10-10 | 上海阿波罗机械股份有限公司 | Auxiliary water supply electric pump in nuclear power plant |
| CN105164424A (en) * | 2012-12-21 | 2015-12-16 | 诺沃皮尼奥内股份有限公司 | Multistage compressor and method for operating a multistage compressor |
| CN105164424B (en) * | 2012-12-21 | 2017-09-01 | 诺沃皮尼奥内股份有限公司 | Compound compressor and the method for operating compound compressor |
| US9903374B2 (en) | 2012-12-21 | 2018-02-27 | Nuovo Pignone Srl | Multistage compressor and method for operating a multistage compressor |
| CN103195759A (en) * | 2013-04-12 | 2013-07-10 | 上海阿波罗机械股份有限公司 | Main feed pump |
| CN107514384A (en) * | 2017-09-27 | 2017-12-26 | 上海阿波罗机械股份有限公司 | Emergency feedwater pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI APOLLO MACHINERY CO., LTD. Free format text: FORMER NAME: SHANGHAI APOLLO MACHINERY MANUFACTURING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201401 Shanghai City, Guangdong Province, the town of Pine Road, No. 555, No. Patentee after: Shanghai Apollo Machinery Co., Ltd. Address before: 201401 Shanghai city Fengxian District West Industrial Park Yisong Road No. 555 Patentee before: Shanghai Apollo Machinery Manufacturing Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20091021 Effective date of abandoning: 20080903 |