Diagnostics of Transmission Bearing Units Based on Thermal Load Study

Abstract. The operating temperature of the transmission unit is noted to affect its reliability and can serve as a diagnostic criterion. It proposed diagnose technical condition by in friction zone order take into account influence air temperature, solar radiation heating adjacent heat-producing objects. (Research purpose) To ensure bearing controllability based on thermal load study. (Materials methods) study uses results calculating nominal operational rear power take-off shaft Belarus-82.1 tractor. three-dimensional modeling finite element analysis distribution under steady-state conductivity conditions. establish functional relationship between method used (Results discussion) maximum modes temperatures were determined for 60310A gearbox during aggregation with different agricultural machines such 4300 Newtons 2.4 degrees Celsius FS-2.0U garden cutter (540 revolutions per minute); 4126 40.7 Rovatti T3K80/90/2 minute) irrigation pump; 956 13.0 ROU-6 (1000) manure spreader; 2615 36.6 KPRN-3.0A mower-conditioner. criterion are established zone, which equal 41.7 at 540 minute engine speed 31 1000 minute. (Conclusions) Since direct measurement hardly possible without changing bearings design, it measure mounting sensor. coefficient proportionality k=0.53 model determined. In implement diagnostics an automatic mode, algorithm developed digital malfunction recorder. Its design ATmega328 programmable microcontroller TMP36 sensors. found that recorder provides control up seven units simultaneously, taking ambient temperature.