Title:
SUBMERSIBLE MOTOR PUMP, MOTOR PUMP, AND TANDEM MECHANICAL SEAL
Document Type and Number:
WIPO Patent Application WO/2011/099196
Kind Code:
A3
Abstract:
A submersible motor pump includes a water jacket (11) having a circulation passage (24A, 24B, 24C, and 24D) of a coolant, a centrifugal impeller (20) for circulating the coolant, a suction passage configured to provide fluid communication between the circulation passage (24A, 24B, 24C, and 24D) and a fluid inlet of the centrifugal impeller (20), and a discharge passage configured to provide fluid communication between a fluid outlet of the centrifugal impeller (20) and the circulation passage (24A, 24B, 24C, and 24D). The discharge passage includes a heat-exchange passage (80) formed by two wall surfaces, one of which is constituted by a member which contacts a liquid conveyed by a main impeller (12). The heat-exchange passage (80) has a circular shape extending radially outwardly from the fluid outlet of the centrifugal impeller (20). The heat-exchange passage (80) includes at least one axial passage section having a length component in an axial direction of the rotational shaft (1).
Inventors:
KAWABATA JUNYA (JP)
MAKINO CHIKARA (JP)
AIYOSHIZAWA SHUNICHI (JP)
MAKINO CHIKARA (JP)
AIYOSHIZAWA SHUNICHI (JP)
Application Number:
PCT/JP2010/068099
Publication Date:
October 06, 2011
Filing Date:
October 07, 2010
Export Citation:
Assignee:
EBARA CORP (JP)
KAWABATA JUNYA (JP)
MAKINO CHIKARA (JP)
AIYOSHIZAWA SHUNICHI (JP)
KAWABATA JUNYA (JP)
MAKINO CHIKARA (JP)
AIYOSHIZAWA SHUNICHI (JP)
International Classes:
F04D29/58; F04D13/06
Foreign References:
| DE10208688A1 | 2003-09-18 | |||
| US3653785A | 1972-04-04 | |||
| EP0990800A1 | 2000-04-05 |
Attorney, Agent or Firm:
WATANABE, Isamu et al. (5-8 Nishi-Shinjuku 7-chome, Shinjuku-k, Tokyo 23, JP)
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