Title:
NUCLEAR REACTOR COOLANT PUMP AND PASSIVE STOPPING SEAL ASSEMBLY THEREOF
Document Type and Number:
WIPO Patent Application WO/2016/078588
Kind Code:
A1
Abstract:
Disclosed is a passive stopping seal assembly (30) of a nuclear reactor coolant pump, comprising a sealing ring (40), a tightening ring (60) and a fusible support block (50). The sealing ring (40) is an opening ring, and in a normal operating condition, the sealing ring (40) surrounds, in an opening state, a pump shaft (18) and keeps a clearance from the pump shaft (18). The tightening ring (60) encircles an outer peripheral wall of the sealing ring (40) to provide, when the plant is in an outage, a clasping force great enough on the sealing ring (40) such that the sealing ring (40) is driven to tightly clasp the pump shaft (18). The fusible support block (50) is embedded in the opening of the sealing ring (40) or the tightening ring (60). In a normal operating condition, the block prevents the ring, within which the block is located, from closing so as to ensure that the sealing ring (40) is in an open state, and when the plant is in an outage, the block is fused so to become ineffective such that the sealing ring (40) is closed under the action of the tightening ring (60). Further disclosed is a nuclear reactor coolant pump comprising this type of stopping seal assembly (30). This type of passive stopping seal assembly has only three components but is capable of satisfying the requirement of a complete shaft seal when the plant is in an outage without depending on an emergency shaft seal injection system, and has a simple structure and tight sealing.
Inventors:
CONG GUO HUI (CN)
LUO ZHI YUAN (CN)
YONG XING PING (CN)
ZHANG YI XUN (CN)
WANG XUE LING (CN)
CHEN CHUN HAI (CN)
CHEN XING JIANG (CN)
MA YU JIE (CN)
YE QUAN LIU (CN)
TANG KUN (CN)
WANG LI FENG (CN)
LUO ZHI YUAN (CN)
YONG XING PING (CN)
ZHANG YI XUN (CN)
WANG XUE LING (CN)
CHEN CHUN HAI (CN)
CHEN XING JIANG (CN)
MA YU JIE (CN)
YE QUAN LIU (CN)
TANG KUN (CN)
WANG LI FENG (CN)
Application Number:
PCT/CN2015/094925
Publication Date:
May 26, 2016
Filing Date:
November 18, 2015
Export Citation:
Assignee:
CHINA NUCLEAR POWER ENG CO LTD (CN)
SHENYANG BLOWER WORKS GROUP NUCLEAR PUMP CO LTD (CN)
UNIV JILIN (CN)
SHENYANG BLOWER WORKS GROUP NUCLEAR PUMP CO LTD (CN)
UNIV JILIN (CN)
International Classes:
F04D29/14
Domestic Patent References:
| WO2014001702A1 | 2014-01-03 | |||
| WO2014147915A1 | 2014-09-25 |
Foreign References:
| CN103711910A | 2014-04-09 | |||
| CN103790855A | 2014-05-14 | |||
| CN103267030A | 2013-08-28 | |||
| US4105040A | 1978-08-08 | |||
| CN202851941U | 2013-04-03 |
Attorney, Agent or Firm:
SCIHEAD PATENT AGENT CO., LTD. (CN)
广州三环专利代理有限公司 (CN)
广州三环专利代理有限公司 (CN)
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