发明名称 |
Method and Device for Monitoring Status of Turbine Blades |
摘要 |
An object of this invention is to sense a transient displacement of the blade position to thereby detect abnormalities early.;The invention includes: one or more first sensors mounted so as to be removable from an outer surface of a casing opposed to blade tips; a second sensor for acquiring a signal from a fixed point on a rotor shaft of the blades; a section configured to extract data groups from an output signal of the first sensor on the basis of information acquired by the second sensor; a section configured to average the data groups; a section configured to determine thresholds from averaged data obtained under a healthy condition; and an assessing section configured to compare magnitude of the thresholds and sensor signals obtained during blade status monitoring.;Since a transient displacement of blade position can be sensed, abnormalities can be detected early in this invention. This early detection, in turn, enables a rotation to be stopped during an initial phase of blade damage. The invention is therefore advantageous in minimizing impacts on other devices. |
申请公布号 |
US2015002143(A1) |
申请公布日期 |
2015.01.01 |
申请号 |
US201414316393 |
申请日期 |
2014.06.26 |
申请人 |
Mitsubishi Hitachi Power Systems, Ltd. |
发明人 |
NISHIMIZU Akira;HIRAOKA Toshiyuki;TOOMA Masahiro;NARISHIGE Soushi;MATSUI Tetsuya |
分类号 |
G01B7/00 |
主分类号 |
G01B7/00 |
代理机构 |
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代理人 |
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主权项 |
1. A device for monitoring status of turbine blades, the device comprising:
one or more first sensors mounted so as to be removable from an outer surface of a casing opposed to blade tips; a second sensor for acquiring a signal from a fixed point on a rotor shaft of the blades; a section configured to extract data groups from an output signal of the first sensor on the basis of information acquired by the second sensor; a section configured to average the data groups; a section configured to determine thresholds from averaged data obtained under a healthy condition; and an assessing section configured to compare magnitude of the thresholds and sensor signals obtained during blade status monitoring. |
地址 |
Yokohama JP |