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임제순(Jesoon Lim),유석균(Sukkyun Yoo),전영기(Youngki Jeon) 대한전기학회 2017 대한전기학회 학술대회 논문집 Vol.2017 No.11
This paper is to show how to solve the problem about thrust of small hydro power plants. While we operate small hydro power plants, bearings and mechanical seals have been damaged several times because of the 1st thrust caused by water flowing in between Runner and Head Cover Wearing Ring and the 2nd thrust caused by water passing Runner. This causes a lot of troubles in succeeding assembly including delay of operation. So, to solve these problems above, We added Runner Balancing Hole for preventing thrust and did piping work, which helped decrease the number of occurrence of thrust. Moreover, to prevent the arrangement from breaking down by over-vacuum of Spiral Casing and to stop Runner blade cavitation, we took an effort for the facilities to run smoothly by installing valve for controlling vacuum.