专利名称：Reactor coolant pump having double dam seal with self-contained injection pump
mechanism
发明人：Janocko, David Jeffrey
申请号：EP89114334.9
申请日：19890803
公开号：EP0354470B1
公开日：
19940119
专利内容由知识产权出版社提供
摘要：A double dam seal (42) in a reactor coolant pump (14) includes an internal mechanism in the seal to pressurize its annulus. In one form, the mechanism is an inclined flow passage (92) incorporated in the rotating runner (48) of the seal (42) having an outlet (94) in communication with the seal annulus (80) and an inlet (96) in communication with reactor coolant water flow within the pump housing (30) and being located on a smaller radius of rotation that the passage outlet (94). Rotation of the runner (48) causes rotational movement of the passage (92) and any water therein, turning the passage (92) and rotating runner (48) into a centrifugal pump, causing a pressure differential along the passage (92) due to centrifugal effects, and feeding water via the passage outlet (94) to the seal annulus (80) at a pressure above that at the passage inlet (96). In another form, the mechanism is a tube (104) projecting at an angle from the rotating runner (46), or a recessed scoop (106) defined in the runner (48) at an angle to, and communicating with a passage (98) having an inlet (102) and outlet (100) at generally the same radius of rotation. The tube (104) or scoop (106) are also at generally the same radius of rotation but extend upstream of the passage inlet (102). Rotational movement of the tube (104)
or scoop (106) with the rotating runner (48) through the reactor coolant water in the seal housing (30) develops a pressure higher at the passage inlet (102) than outlet (100) which, in turn, is supplied by the passage (98) to the double dam seal annulus (42).
申请人：WESTINGHOUSE ELECTRIC CORP
reactor pressure中文地址：US
国籍：US
代理机构：Gallo, Wolfgang, Dipl.-Ing. (FH)
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