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Common "NTN Bearing Equipment Challenges and Viewing Specifications"
Source: Bearing network time: 2013-06-10
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Second, the bearing equipment must be removed before.
Third, choose smooth grease.
4. In the case of smooth bearings; the number of smoothing agents filled with NTN bearings is preferably 1/2 to 1/3 of the inner space of the bearing; it should be reduced to 1/3 at high speed.
5. Equipment and disassembly: Do not directly hammer the bearing end face and non-stress surface when the equipment is used; the bearing should be evenly stressed by the clamp, sleeve or other equipment; do not pass the rolling body transmission equipment.
Sixth, the radial direction of the bearing: the mission clearance after the bearing is installed; it is more than the original clearance before the equipment. Fortunately, the postal bad mother Han 㷠㷠褂 褂 å²¢ å²¢ å²¢ é€ é€ é€ é€ (5) 牡 湫瘟.
Power work; starting from no-load low-speed; gradual progress to additional work for the specified conditions. Check the items in the test work; can there be abnormal sound, NTN bearing temperature change, smoothing agent leakage or discoloration, etc. ; should work immediately; check the machinery; if necessary, remove the bearing to view.
Bearing temperature; generally can be estimated according to the external temperature of the bearing housing. But using the oil hole to directly measure the temperature of the bearing outer ring is more accurate.
The transition sound of the bearing is viewed with a stethoscope, etc.; there are strong metal noise, abnormal sounds, irregular sounds, etc. to clarify the abnormality. The reason is that the smoothness is poor, the accuracy of the shaft or the bearing housing is poor, the bearing is damaged, and the foreign matter is invaded.
The manufacturing process of NTN bearings is messy; the products can be obtained through multiple processes; the skills of casting, heat treatment, turning and grinding can be completed and the quality of the bearings can be affected; especially the heat treatment and Grinding process; it is the direct cause of many bearing failures; demand is highly valued by the production company.
After the bearing equipment is finished; in order to check whether the equipment is correct; to check the work. The small machine can be rotated by hand; to determine whether the rotation is smooth. Check the project for work due to foreign objects, scratches and indentations; Poor; the torque generated by the equipment seat is not stable; the torque is too large due to too small clearance, equipment error, seal conflict, etc. If there is no abnormality, the power can be started.
Large machinery can not be manually rotated; therefore, the power is cut off immediately after the idling is started; the machine is idling; whether there is oscillation or noise; whether the rotating parts are touched, etc.; after the abnormality is determined;
Power work; start from no-load low-speed; gradually increase to additional work for the specified conditions. Check the items in the test work; whether there is abnormal sound, NTN bearing temperature change, smoothing agent leakage or discoloration, etc. ; work immediately; check the machine; remove the bearing if necessary.
NTN bearing temperature; generally can be estimated according to the external temperature of the bearing housing. But the oil hole is used to directly measure the temperature of the outer ring of the bearing. The bearing temperature is gradually increased from the beginning of the work; generally the temperature is stable after 1~2 hours. Poor equipment; temperature will rise sharply; abnormal high temperature occurs. The reasons are, for example, excessive smoothing agent, too small bearing clearance, poor equipment, excessive conflict of sealing equipment, etc. High-speed rotation; bearing layout, smooth selection of faults, etc. It is also the reason.
The transition sound of NTN bearing is viewed with a stethoscope, etc.; there are strong metal noise, abnormal sounds, irregular sounds, etc. to clarify the abnormality. The reason is poor smoothness, poor accuracy of shaft or bearing housing, bearing damage, foreign matter entering, etc.
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