Abstract
The patent pending design of the crank shaft deformation measuring device by means of the symmetric method, was presented. The new solution eliminates imperfections and inaccuracies resulting from the method currently used for this purpose, and enables correct assessment of the crankshaft positioning in main bearings.
Highlights
Elimination of elastic deflections of large machine elements, especially flaccid ones with relatively small proportions of transverse dimensions to length, such as crankshafts of ship engines, requires their multi-point support
Deflection as a criterion for assessing the bearing condition of crankshafts The most common way to measure deflections of the shaft is to measure the springing of crank arms [4,5,6,7,8]
The spring measurements are carried out using a displacement sensor mounted between the individual crankshaft crank
Summary
Elimination of elastic deflections of large machine elements, especially flaccid ones with relatively small proportions of transverse dimensions to length, such as crankshafts of ship engines, requires their multi-point support. This mechanism makes it possible to obtain the sensor's initial voltage, and at the same time, guarantees a secure fit and fixation of the measuring device with ball centers in the drillings made by crankshafts on the inside faces of the crank shoulders
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