CN202713052U - Shielding motor applied to reactor coolant pump - Google Patents
Shielding motor applied to reactor coolant pump Download PDFInfo
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- CN202713052U CN202713052U CN 201220230169 CN201220230169U CN202713052U CN 202713052 U CN202713052 U CN 202713052U CN 201220230169 CN201220230169 CN 201220230169 CN 201220230169 U CN201220230169 U CN 201220230169U CN 202713052 U CN202713052 U CN 202713052U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Motor Or Generator Cooling System (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The utility model relates to a shielding motor applied to a reactor coolant pump which has high power and high reliability and is applied to a nuclear power plant, which belongs to the field of motors. According to the functions, the shielding motor drives a pump wheel to provide sufficient flow for a reactor coolant system; and after the loss of an external power supply under the enforceable flow, a motor rotation member has sufficient rotational inertia to provide running out flow which is combined with natural circulation of a subsequent reactor coolant system to fully cool the reactor core, thus the safe operation of a reactor is ensured. The shielding motor comprises a stator upper head, a frame, a stator iron core winding, a rotor, a flywheel, a thrust plate, a radial bearing, a thrust bearing, a bottom cover, an external heat exchanger, a cooling pipe, a wire outlet box, a supporting cylinder, a rotor shield, a stator shield, a cooling jacket, a heat exchanger support, a C type sealing ring, a bottom cover bolt and other components.
Description
Technical field
The utility model relates to a kind of shielded motor for reactor coolant pump.
Background technology
Nuclear power plant's reactor coolant pump circuit cycle pump is (except control rod drive mechanisms (CRD)) unique active component in the Nuclear Steam Supply System major loop, is called " reactor coolant pump (RCP) ".The reactor coolant pump function provides corresponding pile core cooling flow and guarantees enough heat transmission, so that depart from nuclear boiling than maintaining the limit value of determining greater than in the safety analysis.The moment of inertia of pump assembly is provided by flywheel, rotor and other rotatable parts.Moment of inertia is for providing flow when the idle conditions.This pressure flow is to cool off fully reactor core with the natural circulation of subsequent reactions reactor coolant system after the supposition loss of power.
Tradition PWR nuclear power plant reactor coolant pump adopts shaft seal formula main pump, and motor is conventional air cooling asynchronous motor, and the shaft seal problem has become and caused one of potential cause that has nuclear nuclear power plant reactor coolant leakage now.Because shaft seal needs a large amount of external system supports, in case power cut of whole factory occurs, all back-up systems may the forfeiture effect, the shaft seal position be the potential root of refrigerant leaks.
Summary of the invention
The purpose of this utility model is a kind of high-power, highly reliable shielded motor that is used for reactor coolant pump for used in nuclear power station of design.The technical solution of the utility model is: a kind of shielded motor for reactor coolant pump, the motor machine is positioned at the below of pump, vertical installation, the shield electric machine main element comprises: stator upper cover (2), support (5), stator core winding (7), rotor (18), flywheel (10), thrust collar (9), journal bearing (8), thrust bearing (15), bottom (12), external heat exchangers (1), cooling pipe (4), outlet box (14), support tube (19), stator can (17), rotor shielding sleeve (16), cooling jacket (6), heat exchanger supports (3), C type sealing ring (13), bottom bolt (11), rotor (18) overcoat dress stator core winding (7), adhere to stator core winding (7) on iron core winding (7) inner tube wall, stator core winding (7) is installed in the support (5), support (5) the two ends support tube (19) of packing into, stator upper cover (2) is installed on the support (5), formed the stator core winding enclosed cavity, stator can (17) two ends respectively with support bottom and stator upper cover (2) welded seal, rotor shielding sleeve (16) is attached on rotor (18) outer cylindrical wall, two ends and retaining ring welding, form the rotor shield gasket, flywheel (10) two ends of rotor of packing into, thrust collar (9) is contained in the two ends of rotor bottom flywheel (10), rotor is by upper lower radial bearing (8) and the radial and axial location of thrust bearing (15) difference, bottom is connected with support (5) with bottom bolt (11), use C type sealing ring (13) welded seal between bottom (12) and the support (5), bottom (12), support (5) and C type sealing ring (13) welded seal form totally enclosed structure, external heat exchangers (1) communicates with motor cavity by cooling pipe, inner loop water is connected to external heat exchangers (1) by pipeline, and cooling jacket (6) is sleeved on the motor case outside.
Function of the present utility model is to drive pump impeller to provide enough flows for reactor coolant loop, after this forces to lose external power source under the flow, the electric machine rotation parts have enough moment of inertia providing the running down flow to cool off fully pile core with the natural circulation of subsequent reactions reactor coolant system, thereby have guaranteed the safe operation of reactor.The utility model is a kind of shield electric machine, structure as shown in Figure 1, shield electric machine is comprised of parts such as stator upper cover, support, stator core winding, rotor, flywheel, thrust collar, journal bearing, thrust bearing, bottom, external heat exchangers, cooling pipe, outlet box, support tube, stator can, rotor shielding sleeve, cooling jacket, heat exchanger supports, C type sealing ring, bottom bolts.Stator core winding is packed into from the upper end in the support, and the two ends support tube of packing into covers the stator upper cover again, has formed the stator core winding enclosed cavity.Stator can is packed into from the support tube inner circle, two ends respectively with support bottom and stator upper cover welded seal, play the stator shielding action.Rotor shielding sleeve is contained in the rotor core outside, and the welding of two ends and retaining ring forms the rotor shield gasket, the flywheel two ends of rotor of packing into, and thrust collar is contained in the two ends of rotor bottom flywheel, and rotor is by upper lower radial bearing and thrust bearing radial and axial location respectively.Bottom is connected with support with the bottom bolt, between usefulness C type sealing ring welded seal, thereby form totally enclosed structure.External heat exchangers communicates with motor cavity by cooling pipe, and the motor of operation is brought inner loop water into heat exchanger, and motor has been played good cooling effect.The cooling jacket hot jacket is outside at motor case, from the external refrigeration motor.
Advantage of the present utility model: this shielded motor has without leakage, high life, the advantage such as highly reliable, non-maintaining, and peripheral heat exchanger places the motor upper end, can play at the good natural-circulation capacity of hot stand-by duty.
Third generation passive PWR nuclear power station has developed the canned pump technology, and motor is highly reliable shielded motor, has thoroughly eliminated the potential leakage root that shaft seal exists, and has further improved technically the security reliability of nuclear power station.
Canned pump is comprised of shielded motor and pump two parts, rotor and impeller of pump share an axle, and place the reactor coolant of high temperature, high pressure, and the motor casing flange adopts bolt to be connected closing with pump, sealing surface by the contact static seal, thereby realized motor and pump without bearing arrangement.The shield electric machine casing designs by system design temperature, and it is the part of the pressure boundary of reactor cooling system.
The utility model has designed a kind of high-power, highly reliable reactor coolant pump shielded motor for used in nuclear power station.This shielded motor forms structure without shaft seal by the pump with combination, has thoroughly solved the root problem of shaft sealing leakage potential in the shaft seal formula main pump, has further improved the security reliability of nuclear power station.
Description of drawings:
Fig. 1 is the utility model cut-away view;
Fig. 2 is the utility model three-dimensional model diagram;
Embodiment
Shielded motor a kind of shielded motor for reactor coolant pump as shown in Figure 1, the motor machine is positioned at the below of pump, vertical installation, the shield electric machine main element comprises: stator upper cover 2, support 5, stator core winding 7, rotor 18, flywheel 10, thrust collar 9, journal bearing 8, thrust bearing 15, bottom 12, external heat exchangers 1, cooling pipe 4, outlet box 14, support tube 19, stator can 17, rotor shielding sleeve 16, cooling jacket 6, heat exchanger supports 3, C type sealing ring 13, bottom bolt 11, rotor 18 suit stator core winding 7, adhere to stator core winding 7 on iron core winding 7 inner tube walls, stator core winding 7 is installed in the support 5, the support 5 two ends support tube 19 of packing into, stator upper cover 2 is installed on the support 5, formed the stator core winding enclosed cavity, stator can 17 two ends respectively with support bottom and stator upper cover 2 welded seals, rotor shielding sleeve 16 is attached on rotor 18 outer cylindrical wall, two ends and retaining ring welding, form the rotor shield gasket, flywheel 10 two ends of rotor of packing into, thrust collar 9 is contained in the two ends of rotor bottom flywheel 10, rotor is by upper lower radial bearing 8 and the radial and axial location of thrust bearing 15 difference, bottom is connected with support 5 with bottom bolt 11, use C type sealing ring 13 welded seals between bottom 12 and the support 5, bottom 12, support 5 and C type sealing ring 13 welded seals form totally enclosed structure, external heat exchangers 1 communicates with motor cavity by cooling pipe, inner loop water is connected to external heat exchangers 1 by pipeline, and cooling jacket 6 is sleeved on the motor case outside.
External heat exchangers 1, stator upper cover 2 and bottom 12 connect cool cycles pipeline of formation by cooling pipe 4; External heat exchangers 1 is installed on the heat exchanger supports 3; one end by cooling pipe 4 connect with stator upper cover 2, the other end passes through cooling pipe 4 and connects with bottom 12; thereby be communicated with into a cooling circuit with motor cavity; outlet box 14 is installed in support 5 lower ends of motor; to be directly exposed in the air for fear of lead-out wire, protection motor lead-out wire safety.
As shown in Figure 2, the utility model is analyzed research, fail safe, reliability and the life-span of having improved shield electric machine by electromagnetism, structural configuration, flow field, temperature field, manufacturing process, material etc.
In the present embodiment shield electric machine design rated power 6680kW, frequency is 50Hz, and number of poles is 4 utmost points, and rated voltage is 6000V, and the class of insulation is 200 grades (C levels), rotor moment of inertia surpasses 1910kgm
2This shield electric machine be designed life 60 years non-maintaining, this shield electric machine is nuclear safety I level category-A equipment.
Claims (2)
1. shielded motor that is used for reactor coolant pump, the motor machine is positioned at the below of pump, vertical installation, it is characterized in that: the shield electric machine main element comprises: stator upper cover (2), support (5), stator core winding (7), rotor (18), flywheel (10), thrust collar (9), journal bearing (8), thrust bearing (15), bottom (12), external heat exchangers (1), cooling pipe (4), outlet box (14), support tube (19), stator can (17), rotor shielding sleeve (16), cooling jacket (6), heat exchanger supports (3), C type sealing ring (13), bottom bolt (11), rotor (18) overcoat dress stator core winding (7), adhere to stator core winding (7) on iron core winding (7) inner tube wall, stator core winding (7) is installed in the support (5), support (5) the two ends support tube (19) of packing into, stator upper cover (2) is installed on the support (5), formed the stator core winding enclosed cavity, stator can (17) two ends respectively with support bottom and stator upper cover (2) welded seal, rotor shielding sleeve (16) is attached on rotor (18) outer cylindrical wall, two ends and retaining ring welding, form the rotor shield gasket, flywheel (10) two ends of rotor of packing into, thrust collar (9) is contained in the two ends of rotor bottom flywheel (10), rotor is by upper lower radial bearing (8) and the radial and axial location of thrust bearing (15) difference, bottom is connected with support (5) with bottom bolt (11), use C type sealing ring (13) welded seal between bottom (12) and the support (5), bottom (12), support (5) and C type sealing ring (13) welded seal form totally enclosed structure, external heat exchangers (1) communicates with motor cavity by cooling pipe, inner loop water is connected to external heat exchangers (1) by pipeline, and cooling jacket (6) is sleeved on the motor case outside.
2. a kind of shielded motor for reactor coolant pump according to claim 1 is characterized in that: external heat exchangers (1), stator upper cover (2) and bottom (12) connect by cooling pipe (4) and form a cool cycles pipeline; External heat exchangers (1) is installed on the heat exchanger supports (3), one end by cooling pipe (4) connect with stator upper cover (2), the other end passes through cooling pipe (4) and connects with bottom (12), thereby be communicated with into a cooling circuit with motor cavity, outlet box (14) is installed in support (5) lower end of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220230169 CN202713052U (en) | 2012-05-22 | 2012-05-22 | Shielding motor applied to reactor coolant pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220230169 CN202713052U (en) | 2012-05-22 | 2012-05-22 | Shielding motor applied to reactor coolant pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713052U true CN202713052U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220230169 Withdrawn - After Issue CN202713052U (en) | 2012-05-22 | 2012-05-22 | Shielding motor applied to reactor coolant pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202713052U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647047A (en) * | 2012-05-22 | 2012-08-22 | 哈尔滨电气动力装备有限公司 | Shielded motor for reactor coolant pump |
| CN104384674A (en) * | 2014-09-30 | 2015-03-04 | 哈尔滨电气动力装备有限公司 | Motorized tungsten electrode argon arc welding method for rotor shield sleeve and rotor protective ring of main pump motor |
| CN104493341A (en) * | 2014-12-15 | 2015-04-08 | 哈尔滨电气动力装备有限公司 | Welding method for shield sleeve for stator of shield motor and lower flange and equipment used for welding method |
| CN109139488A (en) * | 2017-06-15 | 2019-01-04 | 何巨堂 | With the shield electric machine and its shielded electric pump of dedicated anti-backflow liquid cooling but electric machine casing |
| CN113982909A (en) * | 2021-10-22 | 2022-01-28 | 中国原子能科学研究院 | Reactor, pump support assembly and cooling system for power pump |
-
2012
- 2012-05-22 CN CN 201220230169 patent/CN202713052U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647047A (en) * | 2012-05-22 | 2012-08-22 | 哈尔滨电气动力装备有限公司 | Shielded motor for reactor coolant pump |
| CN104384674A (en) * | 2014-09-30 | 2015-03-04 | 哈尔滨电气动力装备有限公司 | Motorized tungsten electrode argon arc welding method for rotor shield sleeve and rotor protective ring of main pump motor |
| CN104493341A (en) * | 2014-12-15 | 2015-04-08 | 哈尔滨电气动力装备有限公司 | Welding method for shield sleeve for stator of shield motor and lower flange and equipment used for welding method |
| CN109139488A (en) * | 2017-06-15 | 2019-01-04 | 何巨堂 | With the shield electric machine and its shielded electric pump of dedicated anti-backflow liquid cooling but electric machine casing |
| CN109139488B (en) * | 2017-06-15 | 2021-11-16 | 何巨堂 | Canned motor's canned motor pump with special anti-backflow liquid cooling motor casing |
| CN113982909A (en) * | 2021-10-22 | 2022-01-28 | 中国原子能科学研究院 | Reactor, pump support assembly and cooling system for power pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20140430 |
|
| RGAV | Abandon patent right to avoid regrant |