CN205349771U - Nuclear power plant is with nuclear island pit pump - Google Patents
Nuclear power plant is with nuclear island pit pump Download PDFInfo
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- CN205349771U CN205349771U CN201521076956.6U CN201521076956U CN205349771U CN 205349771 U CN205349771 U CN 205349771U CN 201521076956 U CN201521076956 U CN 201521076956U CN 205349771 U CN205349771 U CN 205349771U
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Abstract
The utility model belongs to the technical field of mechanical engineering pumps, in particular to nuclear power plant is with nuclear island pit pump, which comprises a pump body, a pump cover, casing and axle, set up stator and rotor in the casing, the stator top sets up bolster bearing housing, the below sets up the step, bolster bearing housing is fixed in casing upper portion, the step is fixed in the casing lower part, the bolster bearing housing upper end sets up the upper cover, the lower extreme of step sets up the pump body, pump body lower extreme is equipped with the pump cover, the pump cover entrance is equipped with the filter screen, the rotor suit is in epaxial portion, the upper end of axle is supported with bolster bearing housing through the upper bearing mutually, the middle part of axle is supported with the step through lower bearing mutually, set up sealing device between the step and the pump body, set up the impeller between the pump body and the pump cover, install impeller is epaxial. Pit pump pump sending high temperature medium's sealing reliability has been guaranteed, the utility model discloses can guarantee for the nuclear power requirement of pit pump to equipment safety, reliability and performance.
Description
Technical field
This utility model relates to a kind of nuclear power plant nuclear island sump pump, belongs to mechanical engineering pump class technical field.
Background technology
Nuclear power cleans with it, economic, safe overall characteristic, is considered one of main flow direction of future source of energy industry development.The construction of nuclear power station belongs to the engineering project of high-tech scope, and the prescription of equipment is particularly severe.Nuclear power plant is one of requisite equipment of nuclear power system with nuclear island sump pump.Nuclear power pump is owing to directly or indirectly relating to nuclear safety, and the therefore safety of equipment, reliability requirement are significantly high.Simultaneously as the temperature of pumped (conveying) medium, radioactivity and pressure rating is harshness, chemical composition and mechanical performance, parts stability and durability aspect to equipment and materials it is also proposed higher requirement.In the design of core pump, manufacture process, except conventional technology requires, also to focus on considering the characteristic of medium, ambient temperature and humidity, running temperature and pressure, radioactivity, entry condition and number of times, system condition, voltage request, safe class, seismic behavior, quality guarantee grade etc..
Utility model content
The technical problems to be solved in the utility model is: provides a kind of and disclosure satisfy that nuclear power pump is to the nuclear power plant of the requirement of device security, reliability and performance nuclear island sump pump.
Nuclear power plant described in the utility model nuclear island sump pump, including the pump housing, pump cover, casing and axle, stator and rotor are set in casing, stator is provided above top chock, it is arranged below step, top chock is fixed on casing top, step is fixed on casing bottom, top chock upper end arranges upper cover, the lower end of step arranges the pump housing, pump housing lower end is provided with pump cover, pump cover porch is provided with filter screen, rotor is set in axle top, the upper end of axle is supported with top chock mutually by upper bearing (metal), the middle part of axle is supported with step mutually by lower bearing, sealing device is set between step and the pump housing, impeller is set between the pump housing and pump cover, impeller is mounted on an axle.
Compact conformation is reasonable, firm supporting, and arranging of filter screen can filter pumped medium, it is to avoid the pump housing causes damage, the setting of sealing device, and stator, rotor and bearing block, bearing can be protected not to be corroded.
Described sealing device includes sealing grease chamber, first mechanical seal, second mechanical seal and sealing axle sleeve, pump housing top is provided with sealing grease chamber, mechanical sealing base is set bottom lower bearing, second mechanical seal, first mechanical seal, sealing axle sleeve is set gradually from top to bottom bottom mechanical sealing base, mechanical sealing base, second mechanical seal, first mechanical seal, sealing axle sleeve are installed on axle, wheel bottom arranges impeller nut, and impeller nut is arranged on axle bottom.Adopt series connection mechanical seal arrange, the double seals that this structure is arranged face-to-face is relatively reliable, be suitable for seal pumping high-temperature medium sump pump, first mechanical seal under the pressure effect of pumped medium, good sealing effect.
Described axle adopts permeability magnetic material.Axle adopts permeability magnetic material, it is possible to avoid superfluidity, produces shaft current and causes unit to transship even bearing damage, adopts that sealing axle sleeve is countershaft to be protected simultaneously, makes axle not contact with medium, it is prevented that axle is pumped dielectric corrosion.
Inside described pump cover, cutting groove is set.The gap between impeller and pump cover need to be controlled during assembling
Described impeller is semi-open type two blade impeller, and impeller is provided with back blade.Semi-open type two blade impeller forms cutter sweep with the cutting groove on pump cover, various impurity dirts in pumped medium can be shredded, avoid impurity etc. that pump group is resulted in blockage, back blade is prevented from the impurity in pumped medium etc. and enters sealing grease chamber, ensure the service life of mechanical seal, a certain size axial force can also be balanced simultaneously.
Described Seal Oil indoor are full of Seal Oil, have expansion part in Seal Oil, are full of air in expansion part.Fluid expanded by heating is had during the work of expansion part available buffer sump pump, it is ensured that seal cavity pressure and be unlikely to too high, it is ensured that good working environment set by Seal Oil indoor.
Described first mechanical seal and mechanical sealing base are respectively positioned on Seal Oil outdoor, and second mechanical seal is positioned at Seal Oil indoor.
The beneficial effects of the utility model are:
Adopt the axle of permeability magnetic material, eliminate shaft current, prevent motor overload or bearing damage, and pump itself has cutting function, prevent sump pump from causing the problems such as equipment blocking because of the impurity in pumped medium etc., back blade is prevented from impurity and enters annular seal space damage mechanical seal, and certain axial force can be balanced, adopt the mechanical seal arrangement of series connection, ensure that the sealing reliability of sump pump pumping high-temperature medium, this utility model ensure that the requirement to device security, reliability and performance of the nuclear power sump pump.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of pump cover in Fig. 1.
Fig. 3 is the left view structural representation of Fig. 2.
Fig. 4 is the structural representation of impeller in Fig. 1.
Fig. 5 is the left view structural representation of Fig. 4.
In figure: 1, pump cover 2, the pump housing 3, impeller 4, Seal Oil 5, expansion part 6, mechanical sealing base 7, step 8, casing 9, upper bearing (metal) 10, upper cover 11, top chock 12, rotor 13, stator 14, axle 15, lower bearing 16, second mechanical seal 17, first mechanical seal 18, sealing axle sleeve 19, impeller nut 20, filter screen.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described further:
As shown in Fig. 1～Fig. 5, nuclear power plant described in the utility model nuclear island sump pump, including the pump housing 2, pump cover 1, casing 8 and axle 14, stator 13 and rotor 12 are set in casing 8, stator 13 is provided above top chock 11, it is arranged below step 7, top chock 11 is fixed on casing 8 top, step 7 is fixed on casing 8 bottom, top chock 11 upper end arranges upper cover 10, the lower end of step 7 arranges the pump housing 2, the pump housing 2 lower end is provided with pump cover 1, pump cover 1 porch is provided with filter screen 20, rotor 12 is set in axle 14 top, the upper end of axle 14 is supported with top chock 11 phase by upper bearing (metal) 9, the middle part of axle 14 is supported with step 7 phase by lower bearing 15, between step 7 and the pump housing 2, sealing device is set, impeller 3 is set between the pump housing 2 and pump cover 1, impeller 3 is arranged on axle 14.Sealing device includes sealing grease chamber, first mechanical seal 17, second mechanical seal 16 and sealing axle sleeve 18, the pump housing 2 top is provided with sealing grease chamber, mechanical sealing base 6 is set bottom lower bearing 15, second mechanical seal 16, first mechanical seal 17, sealing axle sleeve 18 is set gradually from top to bottom bottom mechanical sealing base 6, mechanical sealing base 6, second mechanical seal 16, first mechanical seal 17, sealing axle sleeve 18 are installed on axle 14, arranging impeller nut 19 bottom impeller 3, impeller nut 19 is arranged on axle 14 bottom.Axle 14 adopts permeability magnetic material.Pump cover 1 is internal arranges cutting groove.Impeller 3 is semi-open type two blade impeller, and impeller 3 is provided with back blade.Seal Oil indoor are full of Seal Oil 4, have expansion part 5 in Seal Oil 4, are full of air in expansion part 5.First mechanical seal 17 and mechanical sealing base 6 are respectively positioned on Seal Oil outdoor, and second mechanical seal 16 is positioned at Seal Oil indoor.
Axle 14 adopts permeability magnetic material, it is possible to avoid superfluidity, produces shaft current and causes unit to transship even bearing damage, adopts sealing axle sleeve 18 countershaft 14 to protect simultaneously, makes axle 14 not contact with medium, it is prevented that axle 14 is pumped dielectric corrosion.Semi-open type two blade impeller forms cutter sweep with the cutting groove on pump cover 1, various impurity dirts in pumped medium can be shredded, avoid impurity etc. that pump group is resulted in blockage, back blade is prevented from the impurity in pumped medium etc. and enters sealing grease chamber, ensure the service life of mechanical seal, a certain size axial force can also be balanced simultaneously.Fluid expanded by heating is had during the work of expansion part 5 available buffer sump pump, it is ensured that Seal Oil room pressure is unlikely to too high, it is ensured that good working environment set by Seal Oil indoor.Adopt series connection mechanical seal arrange, the double seals that this structure is arranged face-to-face is relatively reliable, be suitable for seal pumping high-temperature medium sump pump, first mechanical seal 17 under the pressure effect of pumped medium, good sealing effect.
Claims (7)
1. nuclear power plant's nuclear island sump pump, including the pump housing (2), pump cover (1), casing (8) and axle (14), stator (13) and rotor (12) are set in casing (8), it is characterized in that: stator (13) is provided above top chock (11), it is arranged below step (7), top chock (11) is fixed on casing (8) top, step (7) is fixed on casing (8) bottom, top chock (11) upper end arranges upper cover (10), the lower end of step (7) arranges the pump housing (2), the pump housing (2) lower end is provided with pump cover (1), pump cover (1) porch is provided with filter screen (20), rotor (12) is set in axle (14) top, the upper end of axle (14) is supported with top chock (11) mutually by upper bearing (metal) (9), the middle part of axle (14) is supported with step (7) mutually by lower bearing (15), between step (7) and the pump housing (2), sealing device is set, impeller (3) is set between the pump housing (2) and pump cover (1), impeller (3) is arranged on axle (14).
2. nuclear power plant according to claim 1 nuclear island sump pump, it is characterized in that: sealing device includes sealing grease chamber, first mechanical seal (17), second mechanical seal (16) and sealing axle sleeve (18), the pump housing (2) top is provided with sealing grease chamber, lower bearing (15) bottom arranges mechanical sealing base (6), mechanical sealing base (6) bottom sets gradually second mechanical seal (16) from top to bottom, first mechanical seal (17), sealing axle sleeve (18), mechanical sealing base (6), second mechanical seal (16), first mechanical seal (17), sealing axle sleeve (18) is installed on axle (14), impeller (3) bottom arranges impeller nut (19), impeller nut (19) is arranged on axle (14) bottom.
3. nuclear power plant according to claim 1 nuclear island sump pump, it is characterised in that: axle (14) adopts permeability magnetic material.
4. nuclear power plant according to claim 1 nuclear island sump pump, it is characterised in that: pump cover (1) is internal arranges cutting groove.
5. nuclear power plant according to claim 1 nuclear island sump pump, it is characterised in that: impeller (3) is semi-open type two blade impeller, and impeller (3) is provided with back blade.
6. nuclear power plant according to claim 2 nuclear island sump pump, it is characterised in that: Seal Oil indoor are full of Seal Oil (4), have expansion part (5) in Seal Oil (4), are full of air in expansion part (5).
7. nuclear power plant according to claim 2 nuclear island sump pump, it is characterized in that: first mechanical seal (17) and mechanical sealing base (6) are respectively positioned on Seal Oil outdoor, and second mechanical seal (16) is positioned at Seal Oil indoor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521076956.6U CN205349771U (en) | 2015-12-22 | 2015-12-22 | Nuclear power plant is with nuclear island pit pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521076956.6U CN205349771U (en) | 2015-12-22 | 2015-12-22 | Nuclear power plant is with nuclear island pit pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205349771U true CN205349771U (en) | 2016-06-29 |
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ID=56169898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521076956.6U Active CN205349771U (en) | 2015-12-22 | 2015-12-22 | Nuclear power plant is with nuclear island pit pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205349771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152405A (en) * | 2017-04-28 | 2017-09-12 | 湖北富升智能装备股份有限公司 | A kind of centrifugal pump directly driven without frame permagnetic synchronous motor |
-
2015
- 2015-12-22 CN CN201521076956.6U patent/CN205349771U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152405A (en) * | 2017-04-28 | 2017-09-12 | 湖北富升智能装备股份有限公司 | A kind of centrifugal pump directly driven without frame permagnetic synchronous motor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190523 Granted publication date: 20160629 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220523 Granted publication date: 20160629 |
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| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220523 Granted publication date: 20160629 |
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| PP01 | Preservation of patent right |