Deflection and Bent, we are measuring by standard method of measurement of distance to rotating kiln section. The data analyzed and presents as polar diagram for eccentricity and local deformations. Additionally, we measure roller shaft deflection to conclude hidden cranks of the shell at support roller position. Also, we reverse calculate the shell bent causing shaft deflection and consider this in the real final shell axis shape.
Support Roller Deflection
We carry out support roller deflection measurement, a dynamic deflection during normal kiln operation. Data recorded for complete rotation of kiln using high precision digital dial gauge of accuracy 0.001 mm. The deflection indicate “hidden bend in kiln shell”, support roller shaft strength under operation load, etc.
Kiln shell runout / eccentricity and hidden crank induce cyclical shaft deflection and leads to incipient of fatigue crack in the shaft.
Static deflection of the shaft will be higher but this we can’t measure; we can measure only variation in the deflection during operation. The static deflection can only be measured during shutdown.