INA water pump shaft bearing damage causes and prevention measures

1. Improper operation reasons: improper installation, operation, or remove the bracket will be may cause deformation or defect suggestion: use the appropriate operation, installation and removal tools. 2. Insufficient lubrication reason: insufficient lubrication or may lead to improper components abrasion or severe deformation of INA bearings Suggestions: improve the lubrication system, timing supplement or replace the lubricant 3 properly. Rust and corrosion reason: contact with water may lead to the pump shaft bearing components erosion and rust. After corrosion damage of bearing at work can lead to spalling advice: regular inspection seal, ensure good sealing effect, correctly stored INA imported bearing. 4. Current reasons: turn the electricity may result in a groove or notch. Bearing static, electrical grounding improper operation will lead to a slight burn advice: outside of INA bearing parts before welding current can be reduced or avoided through proper grounding connection by bearing 5. External material reasons: wear particle pollution and debris intrusion can lead to import bearing face advice: wear, abrasion and sag into particles and debris, replacement of lubricants, check the sealing system 6. Eccentric reasons: eccentricity, inclination, or excessive load may result in geometrical stress concentration or surface spalling advice: precision machining INA imported bearing, and shoulder INA bearings after installation, in order to check whether the installation is correct, check for running. Small mechanical can rotate with the hand, to confirm whether to rotate smoothly. Check project has caused by foreign bodies, scars, creasing seized up, due to bad installation, installation of seat processing bad moment is not stable, because the clearance is too small, installation error, seal friction caused by the torque is too big, and so on. If there is no abnormal can start power operation. Dynamic operation, from the beginning of the no-load speed, slowly up to the rated operating conditions. Test run to check the items, whether there is abnormal sound, water pump shaft bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, when it is necessary to remove the INA bearing inspection. 1, assembly to prevent foreign body: bearing in loaded on the rotor dynamic balance when it is easy to dynamic balance of iron into the bearing inside, so it is best to install bearing before do dynamic balance. There are some manufacturers in order to convenient assembly, assembly in bearing indoor coated with some oil or grease lubrication effect, but usually operators good amount of it is hard to control, if oil or grease in the bearing interior storing up more, in the water pump shaft bearing rotates along axis to the INA bearings inside easily. Bearing chamber it is best not to apply oil or grease, if must apply to control shall not be storing up in bearing interior. 2, paint, rust prevention: paint rust is characterized by multiple in sealing type motor, the motor sound is very good, when it is assembled but put some time in the warehouse, the motor sound is very big, remove the water pump shaft bearing has serious rust phenomenon. Many manufacturers will think is a problem of bearing before, after our propaganda, motor factory now have realized mainly is a question of insulating varnish. Acid varnish comes out of the problem is mainly due to the formation of corrosive substances under certain temperature and humidity, the bearing channel after corrosion lead to damage of INA bearings. The problem now is only to choose good insulating paint, after drying and ventilation assembly after a period of time. 3, shaft and the bearing chamber tolerance selection and control: water pump shaft even after bearing pressure into the bearing should be flexible rotation without blocking. If there are any obvious rotation is not flexible, indicates the size of the shaft is too big, tolerance to downgrade. Such as water pump shaft bearing pressure into the shaft by hand after the rotation is obvious 'sasha vujacic' feeling, may be the shaft or shaft roundness tolerance is too big. When control the shaft and the bearing chamber tolerance so also want to control the roundness, at present many domestic manufacturers to control the tolerance, not to control the roundness. 4, bearing assembly way: because the bearing is high precision products, such as improper assembly is easy to cause damage to the pump shaft bearing channel, cause the damage of INA bearings. When bearing assembly shall have a dedicated mold, not casually, only small circle of stress when pressure into the shaft, pressure can force the circle circle. Require the use of pneumatic or hydraulic assembly, touched up and down when pressed to outside the state level, such as with sloping channel by mechanical damage can lead to bearing, guide ring and the bearing. INA bearing life is closely related to manufacturing, assembly, use, and must be made at each link to make the water pump shaft bearing is in the best operation condition, so as to prolong the service life of bearing.