DUAL PELTON WHEEL AND OPERATING METHOD THEREOF

申请公布号：

JPS60249672(A)

申请号：

JP19840105960

申请日期：

1984.05.25

申请公布日期：

1985.12.10

申请人：

TOSHIBA KK

发明人：

SATOU SHINSAKU

分类号：

F03B1/00;F03B15/20

主分类号：

F03B1/00

摘要：

PURPOSE:To make highly efficient operation performable so well within a wide head range, by varying a diameter of a pitch circular of each bucket in plural runners so as to shift a peak value of variable head characteristics in each runner somewhat higher or lower than a designed reference head. CONSTITUTION:A diameter D1 of a pitch circle in a bucket 4 in the upper stage runner 2 attached to a main shaft 1 is formed into being large, and its design head H1 is shifted somewhat higher than a reference designed head H0. And, likewise a diameter D2 of a pitch circle in a lower stage runner 2 is formed into being small, and its design head H2 is shifted somewhat lower than the said H0. Then, a head signal H detected out of a head detector 15 is led into a judger 16, and when this satisfies a relationship of H>=H0, a needle valve 11 is controlled for its proper opening by needle valve driving devices 13 and 14, while a needle valve 12 is made to come into a state of fully closed. And, when H<H0 is the case, the needle valve 11 is fully closed, thus the needle valve 12 is controlled for its proper opening.