Centrifugal compressor wheel bearings, thrust bearing fault mechanism research

All shaft current, both inside and outside the bearing inspection found when bearing down circle as the washboard sample strip traces on the runway, this is a common characteristic of shaft current for rolling bearing damage. Sliding bearing structure design & amp; emsp; The different heart or bearing hole axis flexure deformation occurred after loading conditions to select automatically self-aligning sliding bearing. In the point of gear reducer and bearing span like < ㎜ worm reducer is common, factory will mostly in both ends with the right amount of axial clearance, in order to protect the bearing flexible operation and thermal elongation of shaft parts. Many motor manufacturers by adjusting the bearing cover inner cavity depth, increase the bearing oil baffle plate, baoding rotor alignment degree to reduce the motor rotor running in the process of dynamic operation and adjust radial fit tolerance of bearings and related parts and see the obvious effect. Bearing parts fit clearance adjustment bearing clearance after hours, due to the shear friction loss in oil in the gap is too big, can also cause bearing heating, at the same time, the clearance after hours, oil amount decreased, too late to take away the heat generated by the friction, will progress to improve the bearing temperature rise. Single for example, the centripetal ball bearings, he is the inner diameter of the mm, for the base hole system, he should be lower deviation is actual situation is not so, centripetal ball bearings on the deviation is lower deviation is negative. When in pneumatic sweep, shaft sleeve, pitting problems fitting surface is point contact repair process, is not a surface contact, leaving long-term safe operation of the equipment, lead to the main shaft of cone and the handle of the cone can't cooperate, mechanical spindle maintenance: reduce the working temperature of bearing, frequently used way is to lubricating oil. Thrust ball bearing type, code-named, mm axial spacing, slow down the inner ring and clamping ring end face and wear; Slow tilt of bending roll and the influence of the thermal expansion of bearing inner ring and bearing load. Check the connection between the contact is bad contact; There is no damage to ac contactor, dc relay; Check thermal relay over-current; Check whether the tube is burnt, etc. So bad as lubricating oil used in the process of dryer can not adapt to run high temperature environment, leads to the formation of a lubricating oil film or can't effectively lubricating oil film, lead to run bearing lubrication is not free. (4) heat treatment: a: conditioning ( Are fire) , local quenching, carburizing, nitriding, 6 gear keys, after loading gear transmission torque, size precision N ( The poor as the poor. Such as bearing clearance before assembly is, therefore, the operator should consider the nature of the bearing load, size, temperature condition, the rotation of the inner ring outer shape various factors.