G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/14 (2006.01) F01D 21/00 (2006.01) F01D 21/04 (2006.01) G01D 5/34 (2006.01)
Patent
CA 2129972
The assessment of clearance conditions in an operating turbine structure has provide difficult to achieve. The invention provides apparatus which enables the clearance between seal fins on rotating blades and adjacent fixed structure, to be observed during rotation; and comprises refracting prisms (30, 32) on the fixed structure arranged so as to straddle sealing fins (14) on the blades. The stage of blades on their associated disc are moved towards the fixed structure and light which is refracted through the prisms is obscured by the fins. In one embodiment, the ratio of obscured to unobscured light is utilised to generate electrical signals, which are then manipulated so as to indicate the magnitude of the clearance.
Jenkins Michael Paul
Sweeney Michael
Gowling Lafleur Henderson Llp
Rolls-Royce Power Engineering Plc
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