국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Non-metal blade-tip clearance measurement by using a reflected type opticl sensor*
저자	Yukio Matsuda, Takeshi Tagashira
Keyword	tip clearance, optical sensor, ceramic gas turbine
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001433.pdf?id=NALTR0001433
보고서번호	NAL TR-1433
발행년도	2001.10
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	The efficiency of a gas turbine engine is directly dependent on the clearance between the rotational blade tip and the engine casing. Therefore, actual gas turbine engines make an effort to minimize tip clearance and, generally, the tip clearance measurement is widely done. Typically, tip clearance measurement is made use of sensors, applied magnetic-electric phenomenon, such as eddy-current type, electrical capacity type and spark/discharge type, etc. However, these sensors cannot be used for a non-metal blade measurement, such as the measurement principle. In ?esearch and development of the ceramic gas turbine?was carried out from 1988 to 1999 in the old Ministry of International Trade and Industry and Agency of Industrial Science and Technology, and National Aerospace Laboratory, based on results of the current gas turbine engine development. In the projects, turbine blade material was ceramic(non-metal) so a current tip clearance sensor could not be used. Then we adapted the method of assuming the distance measurement by the reflection of light as a measurement principle which can fundamentally measure tip clearance for a non-metal blade. Finally, we made sensor for trial purposes, with the aim of installing it in the real machine engine, and the performance of the sensor was proven with a simulated rotational blade device and high-speed rotational metal disk equipment. The efficiency of a gas turbine engine is directly dependent on the clearance between the rotational blade tip and the engine casing. Therefore, actual gas turbine engines make an effort to minimize tip clearance and, generally, the tip clearance measurement is widely done. Typically, tip clearance measurement is made use of sensors, applied magnetic-electric phenomenon, such as eddy-current type, electrical capacity type and spark/discharge type, etc. However, these sensors cannot be used for a non-metal blade measurement, such as the measurement principle. In Research and development of the ceramic gas turbine?was carried out from 1988 to 1999 in the old Ministry of International Trade and Industry and Agency of Industrial Science and Technology, and National Aerospace Laboratory, based on results of the current gas turbine engine development. In the projects, turbine blade material was ceramic(non-metal) so a current tip clearance sensor could not be used. Then we adapted the method of assuming the distance measurement by the reflection of light as a measurement principle which can fundamentally measure tip clearance for a non-metal blade. Finally, we made sensor for trial purposes, with the aim of installing it in the real machine engine, and the performance of the sensor was proven with a simulated rotational blade device and high-speed rotational metal disk equipment.