Temperature diagnostics of bearings drying cylinders of the cardboard making machine

The object of work is the bearings of the drying cylinders of the cardboardmaking machine. The subject of the work is temperature diagnostics of the technical condition of the bearings of drying cylinders. The purpose is to develop a method for calculating the permissible temperature levels of bearings of drying cylinders and the use of permissible temperature levels to assess the technical condition of bearings. During the period of operating time, the wear of the rubbing surfaces of bearing parts is accompanied, by the formation and development of defects. Defects increase the friction forces between the rubbing parts and the temperature of the bearings. The temperature of the bearing housings is considered as a structural parameter of the technical condition of the bearing. Experimental studies of the temperature of the bearings of drying cylinders under the steady-state operation of the cardboard-making machine have been carried out. The calculation of the total measurement error of instruments and instruments was made. The reproducibility of temperature diagnostics was established by checking. The deviating temperature levels of individual bearings of the examined array have been clarified. The calculation determines the average and permissible temperature levels of bearings separately from the front and drive sides of the drying groups for steam supplied to the drying cylinders. According to the processed data of experimental studies it was found that the bearings on the front side in each of the groups of pairs have an arithmetic mean temperature level 7...9 C lower, than on the drive side. The arithmetic mean temperature level of the bearings of drying cylinders increases from the third group of steam to the first. The temperature difference between adjacent groups is 5...9 C, and between the first and third groups reaches 20...21 C. Thus, a method of temperature diagnostics of bearings of drying cylinders of a cardboard-making machine has been developed and tested. Diagnostic measurements were carried out and the permissible temperature levels of bearings with two-way restriction were calculated. According to the permissible temperature levels, the technical condition of the bearings was assessed. 4 bearings with the rating "unacceptable" were found. The proposed method of temperature diagnostics satisfies the conditions of reproducibility and ensures the detection of faulty bearings in the operating mode of the equipment.

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