NTN self-aligning ball bearing installation failure detection method

After the NTN bearing installation, in order to check whether installed correctly, check for running. Small mechanical can rotate with the hand, to confirm whether to rotate smoothly. Check project has caused by foreign bodies, scars, creasing seized up, due to bad installation, installation of seat processing bad moment is not stable, because the clearance is too small, installation error, seal friction caused by the torque is too big, and so on. If there is no abnormal can start power operation. Dynamic operation, from the beginning of the no-load speed, slowly up to the rated operating conditions. Test run to check the items, whether there is abnormal sound, self-aligning ball bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, when it is necessary to remove the bearing inspection. 1, low noise, NTN bearing installation and adjustment also can imitate grouping method of long life bearings, makes the interference fit the size is consistent, bearing clearance is relatively consistent, and hope to cooperate with interference within may take smaller values, to ensure the deformation of bearing raceway is small, and rolling body caused by noise is smaller. 2, clearance on the relationship between the noise is very large, ideally when NTN bearing is in running state, the highest temperature clearance value is zero. Judgment methods of clearance is too large, stationary state make self-aligning ball bearing axial displacement, the extent of the reciprocating is bigger, the big and heavy turbidity of a noise during operation. 3, if the hate sharp whistlers, shows NTN bearing preload is too big, preloaded, bearing a large prestressing degree should have to relax. If the clearance is too large, can make the two bearing ring along the axial relative offset slightly: both reduced clearance, and increase the axial rigidity, bearing noise can be reduced. 4, rolling body around would not bite into the no-load area or channeling, that will not only increase the noise can also cause wear and tear, and the small clearance and large axial stiffness can eliminate the phenomenon. But cannot too small clearance, lest cause high temperature and shorten the life. 5, sometimes because of the host operating temperature range is very large, or the size of the shaft and the bearing hole discreteness is very big, can't get a setting on a proper clearance, in this case, a switch can be heart ball bearing outer ring by using elastic constant pressure preload. NTN bearing and shaft joint popular for the transition of the joint venture, seat and bearing hole of the joint venture for the clearance of the joint venture. The center axis of the two-way bearing ring should be fixed on the shaft, in order to avoid related to migration of axis shift. Bearing device, a popular condition is the condition of shaft changes in the majority, and inner ring and the shaft joint venture for win, bearing outer ring and bearing chamber of the joint venture for the clearance of the joint venture. Gear bearing, to fix the dial gauge box shell end face, make the table touch the top of the head in the bearing axis shift bearing ring raceway on migration, migration transformation while see dial gauge pointer, if the deflection of the pointer, clarify among axis and axis line not vertical. If the box shell hole deep, also can use extended dial gauge head hone. This is a very good hone shaft circle and axis perpendicularity of the median line method. The wrong bearing assembly, NTN bearing not only don't work properly, and each of the joint venture will face badly worn. Because the circle with the seat and the difference is not obvious, the assembly of cockiness special be careful, can't appear upside. Device accurate time should be when the seat can take the initiative to adapt to the roller rolling, to ensure that is located in the upper and lower roller ring raceway. In addition, self-aligning ball bearing seat and bearing holes should also be left between 0. 2 - 0. 5 mm gap to compensate the error in the composition of the defective parts processing, installation, when the bearing ring in the middle shift operation, the clearance can ensure that its active adjustment, the avoidance of friction, make its normal operation. Otherwise, will make serious damage of the bearing.