Hollow shell deflection reading system

G - Physics – 08 – C

Patent

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340/135

G08C 21/00 (2006.01)

Patent

CA 2028505

- 20 - ABSTRACT OF THE DISCLOSURE A direct reading ovality sensing and recording system for attachment to the outer surface of the steel shell of a kiln or like rotary processing equipment, utilizes a so-called dial (or depth) testing indicator (DTI) mounted upon a short chordal bridge. The instrument directly measures fluctuations in the distance between the surface of the kiln shell and the centre of the bridge. The digital electronic output from the DTI is recorded in a data logger, during the rotation of the kiln, under normal working conditions. The primary use of the system is to accurately measure the actual conditions of flexing of the steel shell, with a view to optimizing the service life of the refractory lining carried in the interior of the kiln. Additionally, a qualitative indication of kiln alignment at the respective pier supports can also be ascertained. In the case of high temperature kilns, where a high thermal gradient acting on the structure of the chordal bridge may produce transient deformation thereof, so as to affect the DTI readings, the system facilitates quantitative evaluation of such thermal deformation, so that the readings may be correspondingly compensated.

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