Title:
GAS TURBINE ENGINE
Document Type and Number:
Japanese Patent JPS63167032
Kind Code:
A
Abstract:
The invention relates to a type of proximity sensor. In one form, two sinusoidal signals travel along two transmission lines near an object. When the distance between one or both of the lines and the object changes, the speed of travel of one or both of the signals changes. There is a correlation between the speed change and the distance, thus allowing one to infer distance from speed change. One way to measure the speed change is to measure the phase relationship between the two signals. The invention can be used to measure clearances between turbine blades and turbine shrouds in gas turbine aircraft engines. Based on the measured clearance, other apparatus can direct hot or cold air upon the shroud to expand or shrink the shroud, thereby changing the clearance.
Inventors:
UIRIAMU RANDORUFU SUTOUERU
Application Number:
JP25749587A
Publication Date:
July 11, 1988
Filing Date:
October 14, 1987
Export Citation:
Assignee:
GEN ELECTRIC
International Classes:
F02C7/28; G01B7/14; G01B15/00; G01B15/02; (IPC1-7): F02C7/28; G01B15/02
Domestic Patent References:
| JPS5697814A | 1981-08-06 | |||
| JPS5925002A | 1984-02-08 | |||
| JPS54138464A | 1979-10-26 |
Attorney, Agent or Firm:
Tokunji Ikunuma