Method of and device for measuring the blade clearance of therma

Geometrical instruments – Gauge – Collocating

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33833, 335421, G01B 514

Patent

active

056493690

ABSTRACT:
In a device for measuring the radial blade clearance between the moving-blade tips (6) and the blade carrier (4) of thermal turbomachines with the use of a measuring needle (7) which is guided along in an opening (16) in the blade carrier (4), is accommodated by the blade carrier (4) in a seat (8), projects radially opposite the moving-blade tips (6) into the flow duct (17) and can be abraded, the measuring needle (7), at its end remaining in the blade carrier (4), is fastened to a flexible guide part (10) projecting from the machine, the other end of the guide part (10) being connected to components (11), for example a screwed socket or a hydraulic cylinder. The components (11) permit a linear movement of the guide part (10), which is surrounded outside the outer casing (5) by a flexible tube (12), and between outer casing (5) and blade carrier (4) by a rigid guide tube (14). The device is especially suitable for measuring the transient blade clearance.

REFERENCES:
patent: 1639494 (1927-08-01), Flanders
patent: 2164339 (1939-07-01), Morgan
patent: 3849893 (1974-11-01), Ormsby
patent: 3932941 (1976-01-01), Ormsby
patent: 4395827 (1983-08-01), Stowe et al.
patent: 4495810 (1985-01-01), Tessarzik et al.
patent: 4928400 (1990-05-01), Schuh
patent: 5125165 (1992-06-01), Gerhard
patent: 5144753 (1992-09-01), Murphy

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