CN201925175U - Backwashing pump of circulating water filter system for nuclear power station - Google Patents
Backwashing pump of circulating water filter system for nuclear power station Download PDFInfo
- Publication number
- CN201925175U CN201925175U CN 201020689351 CN201020689351U CN201925175U CN 201925175 U CN201925175 U CN 201925175U CN 201020689351 CN201020689351 CN 201020689351 CN 201020689351 U CN201020689351 U CN 201020689351U CN 201925175 U CN201925175 U CN 201925175U
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- pump
- bearing
- circulating water
- shaft
- cover
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Abstract
The utility model discloses a backwashing pump of a circulating water filter system for a nuclear power station, which is a single-stage single-suction upright centrifugal pump and comprises a stator component, a rotor component, a bearing component, a shaft seal component and a motor. The stator component consists of a pump body, a pump cover, a bearing support and a motor support, the rotor component includes an impeller, a pump shaft and a pump sleeve, the pump shaft is connected with the impeller by the aid of an impeller nut, the shaft sleeve is sleeved on the middle upper portion of the pump shaft, and the pump body is a radially split double-volute structure. The bearing support comprises a middle support and a bearing body. The outer edge of the pump cover is clamed between the upper end of the inner edge of the pump body and the lower end of the inner edge of the middle support. The bearing component consists of a pair of angular contact ball bearings, a guiding bearing and an upper bearing cover, the angular contact ball bearings are mounted in an inner cavity of the bearing body in a back-to-back manner and sleeved on the middle upper portion of the pump shaft, and the guiding bearing is sleeved between the lower portion of the pump shaft and the inner edge of the pump cover. The shaft seal component consists of a pump body seal and a bearing oil seal, the pump body seal is mounted at the upper end of the pump cover, and the bearing oil seal is mounted in the inner cavity of the bearing body and positioned at lower ends of the angular contact ball bearings.
Description
Technical field
The utility model relates to a kind of pump, is specifically related to a kind of circulating water filtration system backwashing pump that is used for nuclear power station.
Background technique
The rotating speed of existing circulating water filtration system backwashing pump is 1480r/min, because under the certain situation of transmitted power, moment of torsion and rotating speed that bearing is subjected to are inversely proportional to, so need two pairs of bearings that are installed separately, the overall dimensions of therefore original pump is bigger, and the weight of rotor is also heavy.The scroll casing type pump housing of circulating water filtration system backwashing pump adopts single channel, make the not enough balance of the radial force of impeller when off-design behaviour point, so hydraulic performance is relatively poor; Bearing support and support are integral type mechanism, the maintenance and safeguard aspect very inconvenient; Bearing adopts thin oil lubricant in addition, need set up extra oil circulation system, thereby strengthen the complexity of system.In order to reduce the overall dimensions of circulating water filtration system backwashing pump, dwindle the volume of pump, alleviate pump rotor weight, change the rotating speed of circulating water filtration system backwashing pump into 2950r/min.Therefore correspondingly to readjust the overall structure of pump.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of circulating water filtration system backwashing pump that is used for nuclear power station to be provided, and it can make alleviating of rotor weight, and the axial force of rotor is reduced, and can reduce the overall dimensions of pump.
The technological scheme that realizes above-mentioned purpose is: a kind of circulating water filtration system backwashing pump that is used for nuclear power station, be the one step single sucking vertical centrifugal pump, described circulating water filtration system backwashing pump comprises stator module, rotor assembly, bearing unit, gland seal assembly and motor, described stator module comprises a pump housing, one is connected the pump cover of the inner edge upper end of the described pump housing, one bearing bracket and that is connected described pump housing upper end is connected the motor frame of the outer rim upper end of the described pump housing, described rotor assembly comprises that one is arranged in the impeller of described pump housing inner chamber, one pump shaft and that is connected with described impeller by impeller nut is enclosed within the axle sleeve of the middle and upper part of described pump shaft, wherein, the described pump housing is the double volute structure of radially split type; Described bearing bracket comprises intermediate support that is connected described pump housing upper end and the bearing support that is connected described intermediate support upper end, and the top of this bearing support is provided with a bearing groove; The outer rim of described pump cover is clipped between the inner edge lower end of the inner edge upper end of the described pump housing and described intermediate support; Described bearing unit comprises that a pair of angular contact ball bearing, that leans against in the bearing groove that is installed in described bearing support privately and be enclosed within on the described pump shaft is enclosed within the bottom of described pump shaft and the bearing upper cover that the guide bearing and between the described pump cover inner edge is sealed on described bearing support upper end; Described gland seal assembly comprises the pump housing sealing of the upper end that is installed in described pump cover and is installed in described bearing support inner chamber and is positioned at the bearing enclosure of described angular contact ball bearing lower end.
The above-mentioned circulating water filtration system backwashing pump that is used for nuclear power station, wherein, the lower end surface central axis of described pump shaft is to offering a tapped blind hole, offer on the cover of described impeller nut one with described pump shaft on the coaxial perforation of tapped blind hole, described impeller nut firmly is connected with described pump shaft by the anti-reverse screw of a spinning in tapped blind hole.
The above-mentioned circulating water filtration system backwashing pump that is used for nuclear power station wherein, is laid with some heat radiation gussets on the outer surface of the bearing groove of described bearing support.
The above-mentioned circulating water filtration system backwashing pump that is used for nuclear power station, wherein, the upper end outer rim of described motor frame is provided with a bulge loop, and described motor uniformly is connected radially adjustment screw on the described bulge loop on described motor frame by some.
The above-mentioned circulating water filtration system backwashing pump that is used for nuclear power station wherein, is installed a lubricating cup on the described bearing upper cover.
The above-mentioned circulating water filtration system backwashing pump that is used for nuclear power station, wherein, the described pump housing is sealed into integrated mechanical sealing, and described bearing enclosure comprises that the flinger ring that is enclosed within described axle sleeve outer rim and two compartment of terrains are located at the felt collar between the outer rim of the inner edge of flinger ring and described axle sleeve.
The technological scheme of used in nuclear power station circulating water filtration system backwashing pump of the present utility model is owing to revolution speed increases, alleviating of rotor weight, the axial force of rotor is reduced, thereby used in nuclear power station circulating water filtration system backwashing pump of the present utility model has the following advantages compared to existing technology:
1. adopt one group of back-to-back angular contact ball bearing, can reduce the overall dimensions of pump, make axial dimension reduce 400mm, radial dimension reduces 195mm;
2. bearing adopts grease lubrication, therefore as long as lubricating cup is installed on bearing upper cover, thereby has reduced the complexity of system;
3. the pump housing is a radially split type, adopts the double volute structure simultaneously, active balance the radial force of impeller when off-design behaviour point, have higher hydraulic performance;
4. on impeller nut, increase anti-reverse screw, can effectively prevent the counter-rotating of impeller;
5. adopt bearing support and the intermediate support that divides body structure, be convenient to the internal overhaul and the maintenance of pump;
6. motor is installed on the motor frame by adjusting screw, makes the installation of motor more convenient and help adjusting the coaxality of motor output shaft and pump shaft.
Description of drawings
Fig. 1 is the structural representation that is used for the circulating water filtration system backwashing pump of nuclear power station of the present utility model.
Embodiment
In order to understand the technical solution of the utility model better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
See also Fig. 1, the circulating water filtration system backwashing pump that is used for nuclear power station of the present utility model is the one step single sucking vertical centrifugal pump, and it comprises stator module, rotor assembly, bearing unit, gland seal assembly and motor.
Stator module comprises a pump housing 1, pump cover 5, bearing bracket, motor frame 7, and wherein, the pump housing 1 is the double volute structure of radially split type; Bearing bracket is made of intermediate support 9 and bearing support 18, is convenient to the internal overhaul and the maintenance of pump; Intermediate support 9 is connected the upper end of the pump housing 1 by 12 AM16 * 70 double-screw bolts 36 and nut 37, bearing support 18 is connected the upper end of intermediate support 9 by six M12 * 30 bolts 17, the top of this bearing support 18 is provided with a bearing groove, on the outer surface of the bearing groove of this bearing support 18, be laid with some heat radiation gussets 180, can improve the intensity and the rigidity of bearing support 18, and increased heat exchange area with air, guarantee the mechanical property that pump is in operation; The outer rim of pump cover 5 is clipped between the inner edge lower end of the inner edge upper end of the pump housing 1 and intermediate support 9; Motor frame 7 is connected on the outer rim of the pump housing 1 by six AM20 * 75 double-screw bolts 10 and nut 11, and the upper end outer rim of this motor frame 7 is provided with a bulge loop 70.
Rotor assembly comprises impeller 2, pump shaft 15 and axle sleeve 19, and wherein, impeller 2 is positioned at the inner chamber of the pump housing 1, is provided with seal ring between the lower end outer rim of this impeller 2 and the inner edge of the pump housing 1; Pump shaft 15 is connected with impeller 2 by impeller nut 3, the lower end surface central axis of this pump shaft 15 is to offering a tapped blind hole, offer on the cover of impeller nut 3 one with pump shaft 15 on the coaxial perforation of tapped blind hole, impeller nut 3 firmly is connected with pump shaft 15 by the anti-reverse screw 4 of a spinning in tapped blind hole, can effectively prevent the counter-rotating of impeller 2; Axle sleeve 19 is enclosed within the middle and upper part of pump shaft 15.
Bearing unit comprises a pair of angular contact ball bearing 33, guide bearing 6 and bearing upper cover 32, and wherein, a pair of angular contact ball bearing 33 leans against in the bearing groove that is installed in bearing support 18 privately and is enclosed within on the pump shaft 15, comes the axial force and the remaining radial force of ballast pump; Guide bearing 6 is enclosed between the bottom and pump cover 5 inner edges of pump shaft 15; Bearing upper cover 32 is sealed on the upper end of bearing support 18 by four M12 * 35 bolts 22, and a lubricating cup 31 is installed on this bearing upper cover 32.
Gland seal assembly comprises pump housing sealing and bearing enclosure, and wherein, the pump housing is sealed into integrated mechanical sealing also is installed in pump cover 5 by four AM16 * 75 double-screw bolts 13 and nut 14 upper end, can prevent reliably that medium from leaking, and easy accessibility has reduced maintenance load; Bearing enclosure is installed in the inner chamber of bearing support 18 and is positioned at the lower end of angular contact ball bearing 33, and this bearing enclosure comprises that flinger ring 20 and two compartment of terrains are located at the felt collar 35 between the outer rim of the inner edge of flinger ring 20 and axle sleeve 19; Also be provided with a felt collar 23 between the inner edge of bearing upper cover 32 and the pump shaft 15.
The output shaft of motor 27 is connected with the upper end of pump shaft 15 by flexible sheet shaft joint 24, also is provided with one between the output shaft of this flexible sheet shaft joint 24 and motor 27 and adjusts ring 30; Motor 27 is fixed on the motor frame 7 by radially adjustment screw 25 and the nut 26 on four uniform bulge loops 70 that are connected motor frame 7, makes the installation of motor 27 more convenient and help adjusting the coaxality of motor output shaft and pump shaft 15.
The circulating water filtration system backwashing pump that is used for nuclear power station of the present utility model has reduced overall dimensions compared to existing technology, has dwindled the volume of pump, thereby has alleviated the weight of pump rotor.On the basis of not removing pipeline, the pump housing 1 and motor frame 7, the taken out part of pump can be extracted out, maintenance is convenient.The radially split type double volute structure active balance of the pump housing 1 radial force of impeller 2 when off-design behaviour point, have higher hydraulic performance.In addition, guide bearing 6 adopts Canadian high-quality imported materials SXL to make, and self-enrichment is good, can adapt to do to start, and does not have attachment during wearing and tearing, and can the temperature of basis own adjusts the gap of itself and pump shaft 15 automatically.The lubricating system of a pair of angular contact ball bearing 33 is grease lubrication, has reduced the complexity of system; The type of cooling of bearing adopts air cooling.By antidetonation analysis and shock test, have better anti, can satisfy the shockproof requirements of used in nuclear power station circulating water filtration system backwashing pump fully.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.
Claims (6)
1. circulating water filtration system backwashing pump that is used for nuclear power station, be the one step single sucking vertical centrifugal pump, described circulating water filtration system backwashing pump comprises stator module, rotor assembly, bearing unit, gland seal assembly and motor, described stator module comprises a pump housing, one is connected the pump cover of the inner edge upper end of the described pump housing, one bearing bracket and that is connected described pump housing upper end is connected the motor frame of the outer rim upper end of the described pump housing, described rotor assembly comprises that one is arranged in the impeller of described pump housing inner chamber, one pump shaft and that is connected with described impeller by impeller nut is enclosed within the axle sleeve of the middle and upper part of described pump shaft, it is characterized in that
The described pump housing is the double volute structure of radially split type;
Described bearing bracket comprises intermediate support that is connected described pump housing upper end and the bearing support that is connected described intermediate support upper end, and the top of this bearing support is provided with a bearing groove;
The outer rim of described pump cover is clipped between the inner edge lower end of the inner edge upper end of the described pump housing and described intermediate support;
Described bearing unit comprises that a pair of angular contact ball bearing, that leans against in the bearing groove that is installed in described bearing support privately and be enclosed within on the described pump shaft is enclosed within the bottom of described pump shaft and the bearing upper cover that the guide bearing and between the described pump cover inner edge is sealed on described bearing support upper end;
Described gland seal assembly comprises the pump housing sealing of the upper end that is installed in described pump cover and is installed in described bearing support inner chamber and is positioned at the bearing enclosure of described angular contact ball bearing lower end.
2. the circulating water filtration system backwashing pump that is used for nuclear power station according to claim 1, it is characterized in that, the lower end surface central axis of described pump shaft is to offering a tapped blind hole, offer on the cover of described impeller nut one with described pump shaft on the coaxial perforation of tapped blind hole, described impeller nut firmly is connected with described pump shaft by the anti-reverse screw of a spinning in tapped blind hole.
3. the circulating water filtration system backwashing pump that is used for nuclear power station according to claim 1 is characterized in that, is laid with some heat radiation gussets on the outer surface of the bearing groove of described bearing support.
4. the circulating water filtration system backwashing pump that is used for nuclear power station according to claim 1, it is characterized in that, the upper end outer rim of described motor frame is provided with a bulge loop, and described motor uniformly is connected radially adjustment screw on the described bulge loop on described motor frame by some.
5. the circulating water filtration system backwashing pump that is used for nuclear power station according to claim 1 is characterized in that, a lubricating cup is installed on the described bearing upper cover.
6. the circulating water filtration system backwashing pump that is used for nuclear power station according to claim 1, it is characterized in that, the described pump housing is sealed into integrated mechanical sealing, and described bearing enclosure comprises that the flinger ring that is enclosed within described axle sleeve outer rim and two compartment of terrains are located at the felt collar between the outer rim of the inner edge of flinger ring and described axle sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020689351 CN201925175U (en) | 2010-12-30 | 2010-12-30 | Backwashing pump of circulating water filter system for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020689351 CN201925175U (en) | 2010-12-30 | 2010-12-30 | Backwashing pump of circulating water filter system for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201925175U true CN201925175U (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020689351 Expired - Lifetime CN201925175U (en) | 2010-12-30 | 2010-12-30 | Backwashing pump of circulating water filter system for nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201925175U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116300A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Back-flushing pump of circulating water filtering system for nuclear power station |
-
2010
- 2010-12-30 CN CN 201020689351 patent/CN201925175U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116300A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Back-flushing pump of circulating water filtering system for nuclear power station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |
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| CX01 | Expiry of patent term |