FANADE Industry(HongKong) Ltd,a professional distributor of Fag taper roller of china http://www.fagbearings-hk.com/Fag-Taper-Roller-Bearings.html ,owns a state-level enterprising technology center,and has developed more than 200 kinds of new products on the annual average ranging from Deep groove ball bearings,self-aligning ball bearings,thrust ball bearings,angular contact ball bearings,tapered roller bearings,cylindrical roller bearings,spherical roll bearings etc with imported and domestic famous brands including Swedish SKF bearings,German FAG,INA bearings,Japanese NSK bearings,Japanese NTN bearings,Japanese KOYO,FYH bearings,Japanese IKO bearings,American TIMKEN bearings,Britain RHP and other famous imported bearings.For decades,the company has established and completed the quality management system of scientific standardization which has passed the quality system certification,with the quality management system in line with international standards.In 2005 they won the title of Chinese famous brand.Here we'd like to talk about Test of centrifugal pump bearings technical standards. 　　A, bearing rotation 　　1, with the bearing and shaft adopts the basic hole system, with the bearing and the shell adopts the basic shaft system. 　　Bearing dimensional tolerance and revolving tolerance value according to the provisions of the GB307-84. 　　2, cooperate with bearing journal and the bearing hole according to the provisions of the GB1031-83, and in the shaft neck roughness Ra value is less than 1.6 microns, bearing hole roughness Ra value is less than 2.5 microns in the box.Test of centrifugal pump bearings technical standards. 　　3, made of GCr15 and ZGCr15 steel bearing ring and roller, the ring and roller hardness value should be 61-65 HRC; With GCr15SiMn and ZGCr15SiMn steel manufacturing, its hardness value should be 60 ~ 64 HRC. Hardness test and the uniformity of the hardness of the same parts as JB1255 rules. 　　4, check the bearing radial clearance and axial clearance shall comply with the terms of GB4604-84. 　　5, turn the inner and outer ring raceway of bearing should be no peeling, serious wear and tear, can not have both internal and external ring crack; Test of centrifugal pump bearings technical standards.Ball should be no wear, keep no serious deformation, turns, no abnormal noise and vibration should be gradually stop stop. 　　6, for C grade tolerance of tapered roller bearings, roller and ring raceway contact precision, to a certain load, under the action of staining examination, contact traces should be continuous, contact length should not be less than 80 of roller busbar. 　　Second, the sliding bearing 　　1, for radial thick wall tile 　　(1) by pressure lead, lift shaft or other method measurement of bearing clearance and tile shell interference quantity, axial clearance requirements, Test of centrifugal pump bearings technical standards,tile shell interference quantity should be 0 ~ 0.02 mm. 　　(2) the test parts, no damage and crack, bearing should be no peeling, porosity, crack, slot and partial grinding burns. 　　(3) bearing condition of contact with the shaft neck with coloring method to check, check that the Angle should be free of 60 ° ~ 90 ° (speed higher than 1000 r/min take lower limit, take limit rotational speed is less than 1000 r/min). In uniform requirements within the scope of contact, Test of centrifugal pump bearings technical standards,each square centimeter should be 2 ~ 4 point of contact, if poor contact, you must adjust their research. 　　(4) cleaning the bearing box, the oil hole open, can not have crack, leakage phenomenon. 　　(5) back and bearing seat should be closely even joint, check with coloring method, and contact area of not less than 50. 　　2, for radial thin wall tile 　　(1) bearing alloy layer and tile shell should be closely combined with, can not have layered, hulling phenomenon. Test of centrifugal pump bearings technical standards,Alloy layer surface and two and a half of the surface should be smooth, level off, do not allow to have crack, air hole, double skin, defects such as slag and bruised. 　　(2) the tiles back with close even joint bearing inner hole surface should be, check with coloring method, and the inner diameter of less than 180 mm, the contact area of not less than 85, inner diameter is 180 mm or greater than,Test of centrifugal pump bearings technical standards, the contact area of not less than 70. 　　(3) fitting clearance of bearing and shaft neck and the status of the contact is by machining, guarantee the precision of the contact area is generally not to study, if uneven along the axial contact, can be a little nap. 　　(4) after the assembly, in the split with 0.02 mm feeler check, should not into to be qualified. 　　3, for thrust bearing 　　(1) bearing shell should be no wear, deformation, Test of centrifugal pump bearings technical standards,cracks, scratches, delaminating, roller compaction and burn defect; Contact with thrust plate mark should be uniform, contact area should be no less than 70 and the entire circumference of each tile uniform; Group segment thickness difference should be no greater than 0.01 mm, tile babbit should according to the direction of rotation round the oil wedge, eli in lubricating oil; The back of the bearing surface level off is smooth. 　　(2) adjusting washers shall be smooth, level off, don't bend and not greater than 0.01 mm in thickness of a layer of gasket. 　　(3) in the bearing cover assembly after repeated use method measurement of axial thrust bearing clearance, its value should be within the scope of the requirements. Test of centrifugal pump bearings technical standards,Using this method of measurement and the axial displacement of the probe lateral thrust bearing clearance must be consistent, and adjusted by the regulation indicates zero displacement sensor. 　　(4) level in combination with surface bearing shell, nice place. Measure the oil temperature of oil hole and tiles alignment, not skewed. Clean oil hole open.