NTN-aligning ball bearing installation failure detection method
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Power operation, start from no-load low-speed, slowly increased to the conditions stipulated in the rated operation. Test run to check the matters, whether there is abnormal sound, temperature changes of aligning ball bearings, lubricant leakage or discoloration. If abnormal, should be immediately discontinued operation, check the mechanical, if necessary, to remove the bearing check.
A low noise ntn bearing installation and adjustment can also follow the group of long-life bearings, making with the surplus size is more consistent, more consistent bearing clearance, and with the surplus to the extent possible, whichever is less value to ensure that the small deformation of bearing raceway to scroll through the body by the noise caused by the smaller.
2, the clearance on the noise, the ideal state is when ntn bearings in the maximum temperature of operation of the state, the clearance value is exactly zero. Judge too much clearance: a static state-aligning ball bearings axial displacement, the magnitude of its reciprocating operation issued by the noise of large muddy.
3, if the operation issued annoying shrill howling, then the preload too much of the ntn bearings, the bearings have large preloaded, it should be slightly relaxed pretension level. If the clearance is too large, the relative position along the axial direction slightly so that the two bearing rings: not only reduces the clearance, but also increases the axial rigidity can reduce bearing noise.
4, the rolling body will slip into the no load zone or around a rocky ledge, then it will increase the noise can also cause wear and tear, a small clearance and axial stiffness can eliminate this phenomenon. Clearance can not be too small, so as not to cause the temperature is too high, and shortened life expectancy.
5, and sometimes the host operating temperature range, or the shaft and the bearing hole size discrete large, not once it is set to be more appropriate clearance, in this case, you can swap the outer ring of ball bearings The elastic constant pressure preload method.
ntn bearing axis of the joint venture is popular for the transition joint venture, the seat and the bearing hole of the joint venture Popular clearance joint venture. The central axis of the two-way bearing ring should be fixed on the shaft in order to avoid the related shift in the axis of migration. Bearing device approach, popular status axis changes the status of the majority, and thus the inner ring and the axis of the joint venture for the win joint venture, the joint venture of the bearing outer ring and bearing room for the clearance joint venture.
The bearing of the device, first dial indicator fixed on the tank shell face to touch the head of the table above migration change bearings in the bearing shaft washer raceway side migration shift while viewing the dial gauge pointer if the pointer deflection clarify axis circle vertical axis of the middle line. If the tank shell hole deeper, can also be used to lengthen the dial gauge head temper. This is a very good temper shaft ring and the verticality of the axis of the middle line approach. Hold against the bearing device, not only not normal ntn bearing work, and the joint surface will be subjected to severe wear. Shaft washer and the seat and the difference is not very obvious, the assembly should be presumptuous special beware not render to hold against. Accurate device of hours of its seat can take the initiative to adapt to the rolling of the rolling elements to ensure that the rolling element is located in the upper and lower ring raceway. In addition, seat-aligning ball bearings and the bearing hole should be left to the gap of 0.2-0.5mm, to compensate parts processing device inaccurate constitute error, when the bearing ring in the operation center shift, this gap to ensure that the initiative to adjust, avoid touching the friction, its normal operation. Otherwise, it will arouse bearing serious damage.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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ntn bearing after installation, in order to check the installation is correct, the operation check. Small mechanical hand rotation, to determine whether the rotation smooth. Inspection items nick, indentation caused by dysfunctional torque instability, arising due to poor installation, mount processing bad due to the clearance is too small, installation errors, and seal friction torque and so on. If there is no exception, you can start the power operation.Power operation, start from no-load low-speed, slowly increased to the conditions stipulated in the rated operation. Test run to check the matters, whether there is abnormal sound, temperature changes of aligning ball bearings, lubricant leakage or discoloration. If abnormal, should be immediately discontinued operation, check the mechanical, if necessary, to remove the bearing check.
A low noise ntn bearing installation and adjustment can also follow the group of long-life bearings, making with the surplus size is more consistent, more consistent bearing clearance, and with the surplus to the extent possible, whichever is less value to ensure that the small deformation of bearing raceway to scroll through the body by the noise caused by the smaller.
2, the clearance on the noise, the ideal state is when ntn bearings in the maximum temperature of operation of the state, the clearance value is exactly zero. Judge too much clearance: a static state-aligning ball bearings axial displacement, the magnitude of its reciprocating operation issued by the noise of large muddy.
3, if the operation issued annoying shrill howling, then the preload too much of the ntn bearings, the bearings have large preloaded, it should be slightly relaxed pretension level. If the clearance is too large, the relative position along the axial direction slightly so that the two bearing rings: not only reduces the clearance, but also increases the axial rigidity can reduce bearing noise.
4, the rolling body will slip into the no load zone or around a rocky ledge, then it will increase the noise can also cause wear and tear, a small clearance and axial stiffness can eliminate this phenomenon. Clearance can not be too small, so as not to cause the temperature is too high, and shortened life expectancy.
5, and sometimes the host operating temperature range, or the shaft and the bearing hole size discrete large, not once it is set to be more appropriate clearance, in this case, you can swap the outer ring of ball bearings The elastic constant pressure preload method.
ntn bearing axis of the joint venture is popular for the transition joint venture, the seat and the bearing hole of the joint venture Popular clearance joint venture. The central axis of the two-way bearing ring should be fixed on the shaft in order to avoid the related shift in the axis of migration. Bearing device approach, popular status axis changes the status of the majority, and thus the inner ring and the axis of the joint venture for the win joint venture, the joint venture of the bearing outer ring and bearing room for the clearance joint venture.
The bearing of the device, first dial indicator fixed on the tank shell face to touch the head of the table above migration change bearings in the bearing shaft washer raceway side migration shift while viewing the dial gauge pointer if the pointer deflection clarify axis circle vertical axis of the middle line. If the tank shell hole deeper, can also be used to lengthen the dial gauge head temper. This is a very good temper shaft ring and the verticality of the axis of the middle line approach. Hold against the bearing device, not only not normal ntn bearing work, and the joint surface will be subjected to severe wear. Shaft washer and the seat and the difference is not very obvious, the assembly should be presumptuous special beware not render to hold against. Accurate device of hours of its seat can take the initiative to adapt to the rolling of the rolling elements to ensure that the rolling element is located in the upper and lower ring raceway. In addition, seat-aligning ball bearings and the bearing hole should be left to the gap of 0.2-0.5mm, to compensate parts processing device inaccurate constitute error, when the bearing ring in the operation center shift, this gap to ensure that the initiative to adjust, avoid touching the friction, its normal operation. Otherwise, it will arouse bearing serious damage.
