Title:
遠心ポンプ
Document Type and Number:
Japanese Patent JP4004572
Kind Code:
B2
Abstract:
A centrifugal pump provided with an impeller (1), a pump shaft (3), a pump housing and with a motor (5) coupled to the pump shaft (3). A shaft seal device is arranged between the pump shaft (3) and the rear wall (4) of the pump housing respectively, and a cooling unit (14) mounted on the outer surface of the latter at the location where the shaft extends through a hole in the rear wall (4). The shaft seal device is provided with a first set of sealing means (10) arranged between the rear wall (4) and the pump shaft (3) as well as with a second set of sealing means arranged so as to prevent coolant from leaking between the shaft and the cooling unit. A thrust collar (15) is interconnected with a flush pipe (18) extending inside the collar but around the pump shaft and further arranged under the two sets of sealing means (10,11). Coolant can flow on the inner surface as well as on the outer surface of the flush pipe. A particularly efficient seal is provided at the location in the rear wall where the extends therethrough.
Inventors:
Bent Pedersen
Application Number:
JP12991896A
Publication Date:
November 07, 2007
Filing Date:
May 24, 1996
Export Citation:
Assignee:
INVENSYS APV A/S
International Classes:
F04D29/08; F04D29/12; F04D29/10; F16J15/34
Domestic Patent References:
| JP4254070A | ||||
| JP43010810B1 | ||||
| JP54026881Y1 | ||||
| JP45028649B1 | ||||
| JP55042046Y1 |
Attorney, Agent or Firm:
Yoshio Kawaguchi
Toru Nakamura
Takeshi Funayama
Naoya Fushimi
Toru Nakamura
Takeshi Funayama
Naoya Fushimi