HYDROPOWER MACHINE AND METHOD FOR CONTROLLING SAME

WIPO Patent Application WO/2013/175969

A1

[Problem] To provide a hydropower machine which can improve the precision of the drive control of a ring gate and can also improve drive speed. [Solution] According to one embodiment, a hydropower machine comprises a ring gate provided between a stay vane placed in the inner periphery of a casing into which water flows, and a guide vane placed in the inner periphery of the stay vane. The machine also comprises at least one hydraulic servomotor for driving the ring gate, and a pressure oil device for supplying pressure oil to the hydraulic servomotor and recovering the pressure oil expelled from the hydraulic servomotor. The machine also comprises at least one first valve which has a first rated flow rate and switches between supplying oil and expelling oil to and from the corresponding hydraulic servomotor, and at least one second valve which has a second rated flow rate equal to or less than the first rated flow rate and switches between supplying oil and expelling oil to and from the corresponding hydraulic servomotor. The machine also comprises a control device for controlling the first and second valves.

JP2000291253	HYDRAULIC TURBINE DRAFT-PIPE SCAFFOLDING
JPH09472	[Name of invention] Power plant of hydraulic turbine and large motor that do not use heavy oil or light oil

GOTO MOTOI (JP)
TOMIYASU HISAYUKI (JP)

PCT/JP2013/063017

November 28, 2013

May 09, 2013

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TOSHIBA KK (JP)

F03B11/00; F03B3/02; F03B15/04; F04D17/02; F04D29/46

JP2011122469A	2011-06-23
JPH0372102U	1991-07-22
JPH10115280A	1998-05-06
JP2002276526A	2002-09-25
JPH1182276A	1999-03-26

KATSUNUMA Hirohito et al. (JP)
Katsunuma Hirohito (JP)

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