CN103267030A - Reactor coolant pump shut-down seal device - Google Patents
Reactor coolant pump shut-down seal device Download PDFInfo
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- CN103267030A CN103267030A CN2013101902018A CN201310190201A CN103267030A CN 103267030 A CN103267030 A CN 103267030A CN 2013101902018 A CN2013101902018 A CN 2013101902018A CN 201310190201 A CN201310190201 A CN 201310190201A CN 103267030 A CN103267030 A CN 103267030A
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Abstract
The invention relates to a reactor coolant pump shut-down seal device. A shut-down seal is located on a reactor coolant pump shaft seal, and when a reactor coolant pump shuts down and a rotor does not rotate, nitrogen with certain pressure on the external is depended on to carry out sealing. Leakage prevention of reactor coolant is mainly achieved through an O-shaped ring between a moving ring and a shut-down seal ring. When the reactor coolant pump operates, nitrogen pressure is removed, and the shut-sown seal is automatically opened through a compression spring to prevent the seal from being dryly abraded and damaged. In addition, under the condition that when the shaft seal of the reactor coolant pump breaks down and loses sealing performance, the shut-down seal will become the last barrier for leakage prevention of the reactor coolant.
Description
Technical field: the present invention relates to the reactor coolant pump parking sealing arrangement.
Background technique: the reactor coolant pump parking sealing arrangement is one of important component part most crucial in the reactor coolant pump structure, be last one barrier that prevents reactor coolant leakage, can direct relation nuclear power plant reactor coolant pump safety, reliable operation.If the parking sealer disabler directly causes reactor coolant leakage when reactor coolant pump is shut down, can cause environmental radiation to pollute.At present, reactor coolant pump is unique equipment of not realizing production domesticization fully in China's nuclear island of nuclear power station.And the manufacturing market of nuclear main pump is waited developed country's monopolization by American-European-Japanese for a long time, because its technical advance, China is in passivity at design and the manufacture view of examining main pump, and depends on import always.
Summary of the invention:
The objective of the invention is to disclose the reactor coolant pump parking sealing arrangement that a kind of reliability height, maintenance cost are low, be convenient to integral disassembly, assembly.Technological scheme of the present invention is: a kind of reactor coolant pump parking sealing arrangement, the sealing surface opposite of the sealing surface of shift(ing) ring (5) and parking sealer ring (6) is installed and is formed parking sealer, sealing function constitutes by the circle of the O shape between shift(ing) ring (5) and the parking sealer ring (6) (5-1), parking sealer ring (6) is installed to down on the half-coupling (2) by socket head screw, seals by O shape circle (6-1) between parking sealer ring (6) and the following half-coupling (2); The one O shape circle (5-1), the 2nd O shape circle (5-2), the 3rd O shape circle (5-3) are installed in respectively in the groove of shift(ing) ring (5), shift(ing) ring (5) is installed in the sealing cover (3), controlling rod (12) is fixed to by being threaded on the shift(ing) ring (5), the displacement state of shift(ing) ring (5) is sent to the outside by controlling rod (12), compression spring (7) is installed in the shift(ing) ring (5), and end ring (8) is fixed on the sealing cover (3) by hexagon head bolt; Compress disk (1) and will descend half-coupling (2) to be fixed on the rotor (13) of reactor coolant pump, seal bolt (10) is fixed to sealing cover (3) on the seal (4), and sealing cover (3) has vent (11).
The invention has the beneficial effects as follows:
(1) the present invention relies on outside nitrogen pressure, shift(ing) ring gravity (5) and compression spring (7) to realize that shift(ing) ring moves up and down, reach the purpose of closing and opening parking sealer, course of action is simple, guarantees safety, the reliable operation of nuclear main pump, and prevents environment nuclear radiation pollution.
(2) parking sealer mainly relies on the O shape circle between shift(ing) ring and the parking sealer ring to realize sealing, and this reliability height, maintenance cost that has guaranteed parking sealer is low.
(3) on the structure, the parking sealer ring is installed to down half-coupling, and shift(ing) ring is installed in the sealing cover, is convenient to integral disassembly, assembly, when saving dismounting greatly.
The explanation of reactor coolant pump parking sealing arrangement principle:
Parking sealer refers to be positioned at the piston of three grades of special shapes above the shaft sealing.
Break down or inject under the situation that serious water failure appears in water in shaft sealing, parking sealer will become last one barrier that prevents reactor coolant leakage.
Under the situation that the reactor coolant pump shaft sealing is broken down, the flow that low pressure is revealed constantly increases, and up to the discharge ability that exceeds the low-pressure leak pipeline, main pump must stop in this case.After the reactor coolant pump pump shaft stops operating, the parking sealer shift(ing) ring relies on outside nitrogen to enter in the chamber by the vent (11) on the sealing cover (3), shift(ing) ring (5) is moved up, O shape circle in shift(ing) ring compresses with the parking sealer ring (6) on the following half-coupling (2), so just can prevent that reactor coolant from flowing out to the external world, when stop supplies nitrogen, shift(ing) ring resets by compression spring and shift(ing) ring (5) own wt, and the position of parking sealer ring (6) feeds back to external control system by controlling rod (12).
Under the situation of removing shaft sealing, parking sealer also can be used for nuclear power station one circuit system pressure test.At this moment, sealing cover (3) and parking sealer assembly only have been installed on seal.
Succeeding in developing of parking sealer, will make the production domesticization work of China's nuclear main pump stride forward major step, for the safety of nuclear power station provides powerful guarantee, also for national nuclear power in the international market competition and carry out condition to third party's outlet and prepare.
Description of drawings
Fig. 1 is reactor coolant pump parking sealing arrangement sectional view
Fig. 2 is the partial sectional view of shift(ing) ring (5) and parking sealer ring (6) mounting point.
Fig. 3 is the partial enlarged drawing of controlling rod (12) mounting point and mounting type.
Embodiment
A kind of reactor coolant pump parking sealing arrangement as shown in Figure 1, the sealing surface opposite of the sealing surface of shift(ing) ring 5 and parking sealer ring 6 is installed and is formed parking sealer, sealing function constitutes by the circle of the O shape between shift(ing) ring 5 and the parking sealer ring 6 5-1, parking sealer ring 6 is installed to down on the half-coupling 2 by socket head screw, seals by O shape circle 6-1 between parking sealer ring 6 and the following half-coupling 2; The one O shape circle 5-1, the 2nd O shape circle 5-2, the 3rd O shape circle 5-3 are installed in respectively in the groove of shift(ing) ring 5, shift(ing) ring 5 is installed in the sealing cover 3, controlling rod 12 is fixed on the shift(ing) ring 5 by being threaded, the displacement state of shift(ing) ring 5 is sent to the outside by controlling rod 12, compression spring 7 is installed in the shift(ing) ring 5, and end ring 8 is fixed on the sealing cover 3 by hexagon head bolt; Compress disk 1 and will descend half-coupling 2 to be fixed on the rotor 13 of reactor coolant pump, seal bolt 10 is fixed to sealing cover 3 on the seal 4, and sealing cover 3 has vent 11.
The present invention adopts shift(ing) ring 5 to move up and down to reach the purpose of closing and opening parking sealer.Pressure is provided for shift(ing) ring 5 by the nitrogen supply (NS) vent 11 on seal 4 and the sealing cover 3, shift(ing) ring 5 is moved up close parking sealer; When nitrogen pressure disappeared, shift(ing) ring 5 resetted by compression spring 7 and shift(ing) ring 5 own wts.
Main pump parking sealer reliability height of the present invention is easy to dismounting, and maintenance cost is low, is conducive to examine the maintenance of main pump, and is applied widely.
Claims (1)
1. reactor coolant pump parking sealing arrangement, it is characterized in that: the sealing surface opposite of the sealing surface of shift(ing) ring (5) and parking sealer ring (6) is installed and is formed parking sealer, sealing function constitutes by the circle of the O shape between shift(ing) ring (5) and the parking sealer ring (6) (5-1), parking sealer ring (6) is installed to down on the half-coupling (2) by socket head screw, seals by O shape circle (6-1) between parking sealer ring (6) and the following half-coupling (2); The one O shape circle (5-1), the 2nd O shape circle (5-2), the 3rd O shape circle (5-3) are installed in respectively in the groove of shift(ing) ring (5), shift(ing) ring (5) is installed in the sealing cover (3), controlling rod (12) is fixed to by being threaded on the shift(ing) ring (5), the displacement state of shift(ing) ring (5) is sent to the outside by controlling rod (12), compression spring (7) is installed in the shift(ing) ring (5), and end ring (8) is fixed on the sealing cover (3) by hexagon head bolt; Compress disk (1) and will descend half-coupling (2) to be fixed on the rotor (13) of reactor coolant pump, seal bolt (10) is fixed to sealing cover (3) on the seal (4), and sealing cover (3) has vent (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310190201.8A CN103267030B (en) | 2013-05-22 | 2013-05-22 | Reactor coolant pump parking sealing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310190201.8A CN103267030B (en) | 2013-05-22 | 2013-05-22 | Reactor coolant pump parking sealing arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103267030A true CN103267030A (en) | 2013-08-28 |
| CN103267030B CN103267030B (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310190201.8A Active CN103267030B (en) | 2013-05-22 | 2013-05-22 | Reactor coolant pump parking sealing arrangement |
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| CN (1) | CN103267030B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790855A (en) * | 2014-02-21 | 2014-05-14 | 清华大学 | Nuclear main pump mechanical seal system with active and passive shutdown sealing |
| WO2016078588A1 (en) * | 2014-11-19 | 2016-05-26 | 中广核工程有限公司 | Nuclear reactor coolant pump and passive stopping seal assembly thereof |
| CN105822587A (en) * | 2016-05-20 | 2016-08-03 | 哈尔滨电气动力装备有限公司 | Anti-pollution O-shaped ring mechanical structure |
| CN105899813A (en) * | 2014-01-08 | 2016-08-24 | 爱信精机株式会社 | Water pump |
| CN109434730A (en) * | 2018-12-12 | 2019-03-08 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump seals room installation and removal positioning device |
| CN110336427A (en) * | 2019-06-26 | 2019-10-15 | 福建福清核电有限公司 | A method of it is jacked up for nuclear power station main coolant pump rotor |
| CN110410355A (en) * | 2019-08-26 | 2019-11-05 | 上海电气凯士比核电泵阀有限公司 | A kind of shaft coupling parking sealing arrangement |
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| US6371488B1 (en) * | 1999-12-17 | 2002-04-16 | George E. Szymborski | Sealing system for high pressure closed systems having a rotating member and a housing therein |
| ZA200507096B (en) * | 2004-09-07 | 2006-06-28 | Crane John Inc | Sealing system for slurry pump |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105899813A (en) * | 2014-01-08 | 2016-08-24 | 爱信精机株式会社 | Water pump |
| CN105899813B (en) * | 2014-01-08 | 2018-01-02 | 爱信精机株式会社 | Water pump |
| CN103790855A (en) * | 2014-02-21 | 2014-05-14 | 清华大学 | Nuclear main pump mechanical seal system with active and passive shutdown sealing |
| WO2016078588A1 (en) * | 2014-11-19 | 2016-05-26 | 中广核工程有限公司 | Nuclear reactor coolant pump and passive stopping seal assembly thereof |
| CN105822587A (en) * | 2016-05-20 | 2016-08-03 | 哈尔滨电气动力装备有限公司 | Anti-pollution O-shaped ring mechanical structure |
| CN109434730A (en) * | 2018-12-12 | 2019-03-08 | 哈尔滨电气动力装备有限公司 | Reactor coolant pump seals room installation and removal positioning device |
| CN110336427A (en) * | 2019-06-26 | 2019-10-15 | 福建福清核电有限公司 | A method of it is jacked up for nuclear power station main coolant pump rotor |
| CN110336427B (en) * | 2019-06-26 | 2021-04-13 | 福建福清核电有限公司 | Method for jacking motor rotor of main coolant pump of nuclear power station |
| CN110410355A (en) * | 2019-08-26 | 2019-11-05 | 上海电气凯士比核电泵阀有限公司 | A kind of shaft coupling parking sealing arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103267030B (en) | 2016-03-23 |
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