Maintenance procedures and precautions for thin-walled bearings
Release time:
2023/01/14
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Do not install it hard on the ball, which will lead to local overload of the ball and contact surface and premature failure of the bearing. Do not use hammer, screwdriver and other hard tools to hit the bearing surface, which will break or embrittle the outer ring of the bearing.
Cleaning of thin-walled bearing and clean environment are very important for bearing. The surface roughness accuracy of the rotating surface and rolling body of the ball bearing ring is about 1/10 m. If the smooth spherical surface is polluted, the impact will be very serious. The lubricating layer between the rolling surfaces is usually 0.2~1 micron, and the granular impurities larger than the lubricant particle size will be excessively crushed by the rolling body, resulting in local compression of the self-aligning roller bearing steel and eventually permanent fatigue of the material. In addition, the size of dust particles in the external environment can reach 10 microns, which will also damage the self-aligning roller bearing. Therefore, a clean and tidy working environment is very important for bearings.
During the process inspection of thin-walled bearing, the working temperature of the bearing is induced by heating. If the temperature exceeds the specified limit, it will automatically alarm to prevent shaft burning. High temperature usually indicates that the bearing is in abnormal condition. High temperature is also harmful to the lubricant of bearing. Sometimes the overheating of the thin-walled deep groove ball bearing can be attributed to the lubricant of the bearing. If the bearing is connected for a long time at a temperature of more than 125, the service life of the bearing will be reduced. The reasons for high bearing temperature include: insufficient bearing lubrication, unqualified impurities in lubricating oil, insufficient bearing internal clearance when the load is too large, causing oil seal friction, etc.
Sealing device
The corresponding sealing devices are installed at both ends of the thin-walled bearing, but many people do not know what role the sealing device plays. Let's see what the sealing device does for thin-walled bearings. Keep the grease inside the bearing from losing during use, and ensure that the bearing is in a lubricating state. Prevent dust or harmful gas outside the bearing from entering the bearing cavity to avoid damage to the bearing.
The sealing structure of thin-walled bearing sealing ring is various, so the sealing effect is also different. If there is a gap between the seal ring and the shaft, it is called non-contact seal. The smaller the clearance, the better the sealing effect, but the smaller the allowable speed of the shaft. On the contrary, on the contrary. If there is no gap between the seal ring and the shaft, it is called contact seal. The larger the contact area of the contact lip of the seal ring, the better the sealing effect, but the smaller the allowable speed of the shaft, the opposite. The main research content of sealing technology is to research and develop corresponding sealing devices suitable for different working conditions, as well as the compatibility of sealing ring material and corresponding lubricating grease.
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