Widening the Functional Scope of the Stand for Accelerated Tests of Bearing Supports

Abstract

The paper is devoted to the problem of widening the functional scope of the stand for carrying out the accelerated tests of bearing supports. The functional scheme of the stand produced at the “Mechatronic systems” department is described. A certain engine and gear are proposed to be used in the stand. Problems to be solved by means of the produced stand are considered. The main problem is the automatization of the testing process and simplifying the accumulation and processing of experimental data. To visualize the results of experimental research, the stand includes the liquid crystal display (LCD), but there is insufficient information on the operational cycle of the LCD bearing. To solve this problem, it is proposed to include three systems into the functional scheme of the stand: information (block of sensor devices, thermal imaging device and IDNS), energy electronic (power semi-conductor transducers) and electric mechanic (containing electric mechanic transducers). The proposed information sub-system allows for widening the functional scope of the stand. Each system is described in details. In order to determine the number of loading cycles, vibrations, to measure the value of the radial component of vibration for the outer bearing ring, the temperature depending on the range of operating temperatures, it is proposed to choose the sensors that meet our requirements. The stand can imitate the loading cycles by the method of accelerated tests. Assessment of the influence of the chosen factors on durability of the bearing unit is carried out based on the results obtained in accordance with the plan of experiments. The paper considers one of the methods - the Locati method. Causes of errors for this method are considered. When applying the Locati method, a little uprated results are obtained, but they are the closest to the actual values.