发明申请
- 专利标题: SUBMERSIBLE MOTOR PUMP, MOTOR PUMP, AND TANDEM MECHANICAL SEAL
- 专利标题(中): 不可动马达泵,马达泵,和机械密封件
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申请号: US12859915申请日: 2010-08-20
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公开(公告)号: US20110200469A1公开(公告)日: 2011-08-18
- 发明人: Junya Kawabata , Chikara Makino , Shunichi Aiyoshizawa
- 申请人: Junya Kawabata , Chikara Makino , Shunichi Aiyoshizawa
- 优先权: JP2010-28863 20100212; JP2010-28864 20100212; JP2010-28865 20100212
- 主分类号: F04D13/08
- IPC分类号: F04D13/08 ; F04D29/12 ; F04D29/58
摘要:
A submersible motor pump includes a water jacket having a circulation passage of a coolant, a centrifugal impeller for circulating the coolant, a suction passage configured to provide fluid communication between the circulation passage and a fluid inlet of the centrifugal impeller, and a discharge passage configured to provide fluid communication between a fluid outlet of the centrifugal impeller and the circulation passage. The discharge passage includes a heat-exchange passage formed by two wall surfaces, one of which is constituted by a member which contacts a liquid conveyed by a main impeller. The heat-exchange passage has a circular shape extending radially outwardly from the fluid outlet of the centrifugal impeller. The heat-exchange passage includes at least one axial passage section having a length component in an axial direction of the rotational shaft.