Title:
回転流体ポンプ
Document Type and Number:
Japanese Patent JP4243363
Kind Code:
B2
Abstract:
A fluid pump includes main support bearings (15) for supporting the impeller shaft and back-up bearings (40) for supporting the shaft upon failure of the main support bearings (15). The back-up bearings (40) are positioned between the main support bearings (15) and shaft driver/motor, and have a radial clearance (45) with the shaft which is greater than the radial clearance (46) between the main support bearings (15) and shaft and yet is small enough to prevent any shards that may result from failure of the main support bearings from passing through the radial clearance space between the back-up bearings and shaft and damaging other rotating parts of the pump. A diagnostic monitor detects wear or failure of the main support bearings by sensing relative shaft displacement. Also, a controller causes the driver to shut down when a predetermined amount of allowable wear of the main support bearings is reached.
Inventors:
Paul E. Bourne
James Robuck
Edward W. Matthews
James Robuck
Edward W. Matthews
Application Number:
JP33333297A
Publication Date:
March 25, 2009
Filing Date:
December 03, 1997
Export Citation:
Assignee:
Crane Co.
International Classes:
F04D13/08; F04D15/02; F04D29/02; F04D29/04; F04D29/046; F04D29/047; F16C17/20
Domestic Patent References:
| JP1015717B2 | ||||
| JP1149017U | ||||
| JP6017771A |
Foreign References:
| US4063786 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita