Bearing in the delivery before routine inspection to remove the oil seal packing, and turn it into oil containing 3% no acid washing gasoline or kerosene, rotate the outer ring and bracket will be washed thoroughly, rolling element and the raceway border, the requirements will be any hidden part of residual oil stains thoroughly clean off. Bearing should be attached to clean after washing clean oil spray dry, in line with clean neutral lining paper work table to dry, or dry slowly in the far infrared drying oven. Since oil spray dry clean and dry or drying, the process may not turn the bearing ring, cage or any rolling element.
Have dry or FAG bearings type http://www.fagbearings-hk.com/ should, in accordance with the provisions, drip into the lubricating oil and check for immediate delivery, no oil film bearing outer surface protection, in the whole process of inspection shall not directly touch the skin of hands, the operator should wear clean gloves, or hand coated with anti-rust agent, but the rust inhibitor must avoid hand bearing with the rolling surface, otherwise it will result in deviation of measurement results.
Bearing in the check has been completed, should be used for immediate delivery or rust inventory processing, also should take to complete the entire inspection process, so as to avoid took too long to cause corrosion. Pay attention to the use of pure gasoline cleaning without oil can also cause corrosion.
Bearing before the check has exiguity and check gauge block, standard parts, and measuring instruments used in the common place in the examination place a piece of metal plate, which can quickly make these objects of homogenization temperature and room temperature.
1, the NSK bearings http://www.nskbearings-hk.com/ temperature is too high: in institutions, installation of bearing parts allowed to have a certain temperature, when the hand touch body shell, should not feel hot as normal, conversely indicates that bearing temperature is too high.
The cause of the high bearing temperature are: lubricating oil quality does not conform to the requirements or metamorphism, lubricating oil viscosity is too high; The assemble tight (inadequate clearance); Bearing assembly too tight; Bearing race in internal rotation shaft or housing; Too much load; Bearing cage or rolling body fracture, etc.
2, bearing noise: the functioning of the rolling bearing in the work to allow a slight noise, if you have any abnormal noise or excessive noise or sound, suggests that the bearing failure.
Cause noise of rolling bearings: is complicated,
Is bearing inner and outer surface wear. Due to this kind of wear and tear, damage the bearing and shell, bearing and shaft 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.
Bearing lubrication, forms the dry friction, and bearing broken etc all make abnormal noise.
3) bearing wear loose after kuang, maintains a looseness damage, also can produce sound bearing damage. Rolling bearings to remove check, according to the damage of bearing bearing failure and damage reasons.
3, metal raceway surface spalling: bearing roller and the inner and outer ring raceway surface under the role of the periodic pulse load, resulting in a periodic change of the contact stress. When stress cycles after reaching a certain value, the rolling element bearings, their work within or surface produce fatigue spalling. If the bearing load is too big, can make the fatigue. In addition, the bearing installation is not straight, shaft bending, also can produce roll flaking off. Bearing raceway fatigue spalling can reduce the running accuracy of shaft vibration and noise in the organization.
4, bearing burns: burn bearing the heat tint of raceway and rolling body. Burns is usually the cause of insufficient lubrication, lubricating oil quality does not conform to the requirements or metamorphism, and bearing assembly too tight.