Fag bearing vibration damage of the four reasons - bearing knowledge and necessary maintenance measures

Fag bearing vibration in production in general, the rolling bearing itself does not produce noise. Often feel 'bearing noise' is in fact the bearing directly or indirectly, with the surrounding structure vibration sound effects. This is why many times the noise can be seen as involving the whole bearing vibration problem of application. ( 1) Due to loading quantity change of vibration roller: when a load on a fag bearing radial load, the number of rolling element bearing load will be a slight change in the running, this caused the load in the direction of migration. The resulting vibration is inevitable, but can be by axial preload to ease, loading in all rolling body ( Do not apply to the cylindrical roller bearing) 。 ( 2) Partial damage: due to the operation or installation errors, a small number of fag bearing raceway and rolling element may be damaged. In the running, rolled the damaged bearing parts will produce a particular vibration frequency. Vibration frequency analysis can identify the damaged bearing parts. This principle has been used in the condition monitoring equipment, used to detect damage of bearing condition. If you want to calculate the bearing frequency, please see the application 'bearing frequency'. ( 3) The precision of the related components: in fag bearing ring and bearing seat or under the condition of close cooperation between the shaft, bearing ring with adjacent components are likely to match the shape and deformation. If there is a deformation, can produce vibration in the operation. ( 4) Pollutants: if run in environmental pollution, impurities may enter the bearing and roller compaction. Vibrations depends on the number of impurity particles crushed, size, and composition won't produce the frequency of the typical form, but you can hear a disturbing noise. Cause noise of rolling bearings is more complex, one is the bearing inner and outer surface wear. Due to the wear and tear, damage to the bearings and shell, fag bearings and the shaft of the cooperate relationship, lead to axis deviation from the correct position, when axis at high speed movement produces sound. When the bearing fatigue, its surface metal flake, also can produce sound make bearing radial clearance increases. In addition, the bearing lubrication, forms the dry friction, and bearing broken etc all make abnormal noise. Bearing wear loose after kuang, maintains a looseness damage, also can produce sound. 1, bearing maintenance: for as long as possible in good condition to maintain original performance, fag bearing arrangement must be maintenance, repair, in order to prevent accident, to ensure reliability of the operation, increase productivity and economy. To maintain the best conditions of mechanical operation of the corresponding operation standard, on a regular basis. Content includes monitor running status, supplement or replacement of lubricants, remove the check on a regular basis. Points for maintenance operation, have a fag bearing rotating the sound, vibration, temperature, the state of the lubricants and so on. 2, bearing maintenance: bearing cleaning: removing bearing under repair, the appearance of the first record fag bearing, confirm the residual stock of lubricant, sampling inspection with lubricant, bearing. Common use gasoline, kerosene as a cleaning agent. Tear open come down to the bearing cleaning, rough washing and fine washing, respectively in the container, put a metal mesh bottom first, make the bearing is not direct contact with dirt from the container. Coarse when cleaning, if to spin bearing with dirt, can damage the bearing rolling surface, should be pay attention to. In coarse clean oil, use a brush to remove grease, adhesive, after clean, roughly into fine cleaning). Fine cleaning, bearing side rotation in the cleaning of oil, while carefully cleaned. In addition, the clean oil is always kept clean. 3, bearing inspection and judgment: in order to judge whether the bearing of the removed can use, check fag bearings in clean water after. Check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, the increase of the bearing clearance and has nothing to do with dimension precision falling damage, abnormal. Non separation of small ball bearings, with one hand will support level, the inner ring spinning confirm whether smooth outer ring.