Title:
ABNORMALITY DIAGNOSTIC DEVICE FOR WATER TURBINE
Document Type and Number:
Japanese Patent JP3642354
Kind Code:
B2
Abstract:
PURPOSE: To diagnose an abnormality of an water turbine by measuring the absolute value of the flow speed of a flow and the angle of the flow at the outlet of a runner without projecting any appliance from the tube wall of a draft tube at the outlet of the runner.
CONSTITUTION: Two pairs of ultrasonic sensors PA1, PA2, PB1, PB2 the measuring lines of which are arranged to cross each other on the tube wall of a dradt tube 3 at the outlet of a runner, are provided, and the flow speed in the direction from PA1 to PA2 and the flow speed in the direction from PB1 to PB2 are determined by the ultrasonic sensors. Then, the absolute value of the flow speed of a flow and the angle of the flow at the outlet of the runner are determined by vectorially shynthesizing both the flow speeds. Thus, since there is no obstruction to the flow due to appliance, an abnormality of a water turbine can be early diagnosed to prevent accidents.
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Inventors:
Shogo Nakamura
Application Number:
JP15510795A
Publication Date:
April 27, 2005
Filing Date:
May 30, 1995
Export Citation:
Assignee:
Fuji Electric Holdings Co., Ltd.
International Classes:
F03B3/00; F03B15/18; (IPC1-7): F03B15/18; F03B3/00
Domestic Patent References:
| JP49067034A | ||||
| JP55009194A | ||||
| JP7119610A | ||||
| JP4091373A | ||||
| JP62025821U |
Attorney, Agent or Firm:
Yoshihide Komada
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