Broken refrigeration compressor bearings? What can be repaired? Which must be thrown?

Broken refrigeration compressor bearings? What can be repaired? Which must be thrown? How to judge whether the bearing can be used again and the defects of the bearing need to be replaced To determine whether the bearing can be used again, it should be decided according to the relevant factors such as the damage level of the bearing, mechanical performance, importance, operating conditions, inspection cycle and so on. However, if the following defects are found during the inspection, the bearing cannot be used any longer and a new bearing needs to be replaced. a. Any one of the inner ring, outer ring, rolling element, and stick frame has cracks or gaps. b. Any one of the ferrule and rolling element is broken. c. There are obvious scratches on the rolling surface, ribs and rolling bodies. d. Or the rivets are obviously loose. Stick to the frame obviously wear. e. There are rust or scratches on the raceway surface and rolling body. f. There are serious pressure marks or bruises on the raceway surface and rolling body. g. There is obvious creep on the inner diameter surface of the inner ring or the outer diameter surface of the outer ring. h. Discoloration due to overheating. i. The bearing seal ring or dust cover sealed with grease is damaged seriously Full repair of bearings? The comprehensive repair of the bearing includes cleaning, disassembly, inspection, grinding or replacement of the inner and outer rings of the damaged bearing, new rolling element manufacturing/original rolling element grinding, rolling element replacement, assembly, clearance adjustment and inspection packaging Comprehensive and strict repair process to ensure that the repaired bearings can meet the performance requirements of the new bearings. What kind of bearing can be repaired? The comprehensive repair of bearings is mainly aimed at the relatively large-scale rolling bearings with relatively high cost of new products (such as transmission bearings, work roll bearings, backup roll bearings and vertical grinding bearings, etc.). Of course, small-diameter bearings can also be repaired. Repair technical difficulties If there is any technical difficulty in bearing repair. Basically, it can be repaired as long as it is a rolling bearing. We will not change the installation size of the bearing that needs to be repaired, because if we change its installation size, this bearing cannot be installed normally. However, because of some machining processes necessary for repair, the internal dimensions of the bearing will definitely change, and we can compensate for these grinding amounts through other methods. Can the repaired bearing really be as good as new? However, can the repaired bearing really be as good as new? The staff of Baosteel introduced that we have our own set of testing methods. The inspection of the repaired bearing and the new bearing showed no difference. At present, bearing repair has become an important measure for many international industrial companies (including steel, metallurgy, energy, paper, cement, aviation and racing, etc.) to reduce costs, and bearing repair has reduced operating costs and saved The purchase cost of production equipment bearings can reach 20%-90%. Causes of bearing damage Not all damaged bearings can be repaired, but for each damaged bearing, before considering repair or replacement of a new bearing, the cause and degree of damage must be evaluated to avoid or reduce further damage. There are many reasons for bearing damage, such as improper installation, dirt intrusion or water intrusion, etc. are common causes of early bearing damage. The following is an analysis of the common damage causes of some large-size bearings and the corresponding preventive measures that can extend the life of the bearings. 1 Improper operation Improper installation, operation or disassembly may cause deformation or defect prevention measures of the cage: use appropriate operation, installation and disassembly tools. 4 current Energization when the bearing rotates may cause grooves or nicks. When the bearing is at rest, improper grounding of electrical operations can cause slight burns. Preventive measures: reduce or avoid current flow through the bearing through proper grounding connections before welding parts other than the bearing. 5 External materials Abrasive particle contamination and debris intrusion may cause bearing face wear, abrasions, and dents. Precautions: Remove intrusive particles and debris, replace lubricant, and check the sealing system. 6 eccentric Precautions for eccentricity, tilt or excessive load may cause geometric stress concentration or surface spalling: precise machining of bearing seats and shoulders.

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