Bearing pedestal bearing: the reason for the turbine bearing vibration

Monitoring of grinding process, because of various machinery has different working conditions, the rolling bearing in the load capacity, structure, and puts forward various requirements in such aspects as the use of performance. Additional repair welding high temperature thermal stress can not completely, easy cause material damage, lead to crack of parts; And the brush plating coating thickness restrictions, easy to peel, and the above method is done with metal repair, can't change 'hard to hard' cooperate relationship, and cannot reach % mating surface, under the force combination, still can cause wear again. Bearing axial pre-tightening force method has two variety of prestressing force is a constant pressure, another kind is pre-tightening force, under the constant pressure preload, bearing radial stiffness increased slightly, the increase of rotational speed and the axial stiffness and Angle quickly down. If give oil supply on a regular basis, the use effect is better, the toughness of the porous metal material is small, only suitable for smooth without impact load and medium and small speed. Sliding bearing bearing, main parts of plants large connecting equipment of the sliding bearing, a bearing shell is made of babbit, which its softening point, low melting point, with the axis of the contact area is large, can bearing load, good shock absorption, can withstand the shock load, if the lubricating oil reservoir in the lower part of its oil needs to have a bad drive, in order to protect the tile surface oil film forming. Although has a small cross-section, bearing still has high load capacity, needle roller bearing with thin and long ( Mm or less roller diameter D, L/D or greater. Transient temperature can be as high as ms within the grinding zone ~ ℃, sometimes with strain hardening layer hardness and metallographic method can be found that caused by the machining deformation of surface hardness. Bartender reasonable lubrication should be: follow the equipment manufacturer for each device using guide; Add grease, should be filling the bearing rolling parts and shell ( Or retainer) Between, in order to protect sufficient grease into, the key of raceway surface get sufficient lubrication; Should be paid attention to when the bearing should be fatliquoring; Monitor equipment indicating instrument, in order to detect signs of problems, such as the abnormal temperature fluctuations and/or high temperature; Pay attention to the equipment noise or abnormal vibration; Observation lubricating oil leakage; Sampling of lubricating oil regularly, and see whether pollution. Common interference when installation, and bearing fit size can also lead to large amount of interference of bearing ring crack ( There are mainly column cylindrical bearing inner ring interference fit) , interference is too big lead to inner ring stress is larger, especially the section thickness is thinner, Cross section thickness (mm) Inner ring, too much interference often leads to inner ring axial crack. Note: surface treatment, and knocked at the height of the pitting, will stand up big axis, in addition to the bearing block parts, the rest with wet asbestos sheet, in case of splash, arc collision. NSK bearing assembly to prevent: when doing loaded on the rotor dynamic balancing is easy to NSK bearings will be generated when the dynamic balance of iron into internal, so good is the NSK bearings before do dynamic balance. : fault judgment, self-lubricating bearing surface in the processing and molding plastic layer can be sure the allowance of stay, device for processing after the seat hole, in order to achieve better set size.