After the completion of the installation of high temperature bearing test run check items

After completion of installation of high temperature bearing test run after the high temperature bearing assembly inspection items, in order to check the device correctly, to stop the test run. Small mechanical energy enough hand rotation, to confirm whether it can rotate smoothly. Check project has formed as a result of foreign bodies, scars, indentation seized up, due to the bad device, device processing torque instability as a result of the bad, because the clearance is too small, installation error, seal friction and provoked torque is too big, and so on. If there is no abnormal can start power operation. Dynamic operation, from the beginning of no-load speed, slowly progress to the rated operating conditions. Test run to check items, whether there are abnormal noise, the change of bearing temperature, smooth agent leaked or discoloration, and so on. If discovery is unusual, should stop immediately, check machine, when it is necessary to remove the high temperature bearing inspection. Avoid: 1, assembling foreign body bearing dynamic equilibrium in loaded on the rotor will easily generated when the dynamic equilibrium of internal iron into bearing, thus bearing before do dynamic balance is good. There are some manufacturers in order to assemble bento, assemble indoor apply some oil or grease in the bearing when the smooth effect, but often operators good amount of it is hard to control, if oil or grease in the bearing indoor storing up more, in the high temperature bearing rotates along axis to the high temperature inside the bearing easily. Bearing chamber is a do not 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 bearing has serious rust phenomenon. Many manufacturer would think that is the problem of bearing before, after our propaganda from time to time, motor factory now has realized mainly is a question of insulating varnish. The problem is mainly due to the insulating paint volatilizes the acid under certain temperature and humidity of corrosive substances, the bearing channel after the corrosion cause high temperature bearing damage. Asked the title can be to choose good insulating paint, before and after drying ventilation assembly after a period of time. 3, shaft and the bearing chamber tolerance selection and control: after the bearing pressure into the bearing should be sensitive rotation without block. If there are any apparent rotation not sensitive, indicates the size of the shaft is too big, tolerance to downgrade. Such as bearing pressure into the shaft by hand after the rotation has 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 to stop, only without the roundness stop control. 4, bearing assembly way: since the bearing is high precision products, such as improper assembly on bearing channel formation damage easily, cause high temperature bearing damage. 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. Assembly request when using pneumatic or hydraulic, touched up and down when pressed to outside the state, if have tilted bearing channel will incur due to mechanical damage, and make the bearing guide ring. High temperature bearing's life is manufacturing, assembly and use are closely related, must do in each link, ability to make high temperature bearing is in good running condition, thus increasing the using life of the bearing. The previous: high temperature resistant bearing using demand attention to matters in the process of the next article: common causes of high temperature bearing failure analysis and treatment measures