SKF outer spherical bearing with analysis of the testing technology

SKF bearing is a kind of precision mechanical bearing components, outside the spherical bearing users deeply hope perfectly on the host bearing can be used for a predetermined period from damage and keep its dynamic performance, but reality sometimes is not very desirable, sudden bearing failure accident can cause great losses to the user. Through a lot of SKF bearing failure analysis showed that the outer spherical bearing short-lived or premature loss of accuracy, have a plenty of due to improper material defect or manufacturing, but in a considerable extent is because there is no bearings used in strict accordance with the requirements for installation, maintenance, or bearing selection or actual load than the load rating of bearing damaged bearing abnormal reasons, for example, the fatigue spalling of bearing parts to a great extent is because the lubricating oil mixed with impurities. Detection, first open the SKF bearing cover, the diameter of the lead wire, appropriate to cut it into 15 ~ 40 mm long segments, on the shaft neck and upper and lower bearing interface, cover the bearing cover, tighten the retaining bolt torque by the regulation, unscrew the bolt, then remove the bearing cover, micrometer is used to inspect flattening lead wire thickness, average for sticking out of the top of spherical bearing clearance. If the top gap is too small, can add pad on the surface of the upper and lower tile combination. If too large, the reduction of pad, scraping the inquiry or watering the tile again. Adjustment of bearing force: in order to prevent the bearing shell may occur in the process of job rotation and axial movement, besides the fit interference and stop parts, bearing bush must also to compaction with SKF bearing cover, tip clearance method, measurement method and measure the thickness of the soft lead wire, can be used to calculate the bearing force ( With the elastic deformation of axle bush compressed volume) General bearing pressure force at 0. 02 ~ 0. 4 mm. If the compaction force do not conform to the standards, the available increase or decrease in outer spherical bearing and the bearing joint face of the gasket thickness method to adjust, tile back no padded. SKF bearing except to ensure the radial clearance, should also guarantee the axial clearance. Detection of axial clearance, remove the shaft to an extreme position, and then measured with a feeler dial indicator or shaft position from one extreme to another extreme position of channeling momentum namely axial clearance.