Bearing malfunction caused by vibration

Rolling bearing in operation in the process of failure according to the characteristics of different vibration signals can be divided into two broad categories: type to wear such failure; Another kind of surface damage such failure, including pitting, falls, bruises, etc. 1. Wear as a general rule, under normal use rolling bearing working surface wear failure experience time Mhy om wipers is longer, is a kind of gradual change failure. Bearing surface, a) Normal bearing dynamic waveform after wear and tear of the vibration with the normal bearing vibration with the same nature, namely, both are no rules, strong randomness. But after wearing the vibration level ( Amplitude) Significantly higher than the normal bearing, as shown in figure 3 - 2, this is the wear failure caused by the basic characteristics of vibration signals. In addition to (caused by the wear fault vibration signal b) Wear the bearing of the dynamic wave vibration level is higher than the normal bearing outside, there is no figure 3 - don't 2 normal bearing and the wear of bearing vibration waveform characteristics of difference, so the diagnosis of this kind of failure could not find a good way to signal processing. Usually it is the effective value of monitoring vibration and peak, if significantly higher than the normal bearing, is judged to be wear and tear. Due to wear and tear will not immediately bearing damage, the damage is far less than a failure surface damage class, so usually people most attention or below to discuss the surface damage of the fault. 2. Surface damage of the surface damage for such failure, when surface damage o rolling bearing components to produce the impact of the mutation pulse power, the pulse force is a broadband signals, so it is cover bearing system caused by the high frequency of natural vibration frequency resonance, so as to produce as shown in figure 3 - The impact of the 3 vibration. This is the surface damage caused by such failure of the basic features of vibration signals. Figure 3 - 3 impact damage failure vibration ingredients from nature can be divided into two categories, one is the point of working surface damage because of the bearing components in the running process of repeated impact and contact the other on the surface of the yuan and the low-frequency vibration components, some literature is called a bearing 'by vibration'. The occurrence of period T. Is regular, can be determined by rotation speed and bearing geometry size. But the damage on the inner, outer ring, or roller, frequency ( f。 = 1/7) Is different, the next section will give the calculation formula. The bearing vibration 'through' the frequency of known as the fault characteristic frequency. By spectrum analysis in the diagnosis of bearing failure, its basic principle is to check the bearing vibration signal in the presence of these fault feature frequency components