The cylinder (or feed and discharge bushing) is fixed on the hollow shaft with bolts and pressed tightly. During grinding operation, the spiral cylinders and fixing bolts for incoming and outgoing materials are loosened, and the top cover and hollow shaft are displaced. Dust enters the bearing box from the gap between the hollow shaft and the top cover, contaminating the grease, causing poor lubrication, and damaging the bearings. Rolling bearings have been widely used in industrial fine powder mills in China, achieving good results in saving power consumption, increasing production, saving lubricating oil, reducing maintenance, and reducing pollution. At present, some manufacturers imitate the method of using bearings for grinding wheels, and the installation form of hollow shafts and rolling bearings has many unreasonable aspects, which has brought certain drawbacks to the future work and operation of grinding wheel manufacturers. In order to solve this problem, we particularly proposed the assembly method of installing rolling bearings on the hollow shaft of the mill. In order to overcome the above shortcomings, after several years of practice and exploration, we have designed new installation methods, which have been well applied in some manufacturers. The method is to install a part of the rolling bearing on the hollow shaft of the grinding machine with a thicker diameter, and the thin oil cooled by the hollow shaft will reduce the temperature transmitted from the hollow shaft to the bearing to a normal range below 60 degrees Celsius.

The advantages of this bearing seat are as follows:

The lower seat of the heavy bearing seat is equipped with an oil level observation indicator, which allows operators to see the oil level at any time and replenish the oil in a timely manner to prevent insufficient oil and poor lubrication and avoid bearing damage accidents.

The normal operating temperature of the heavy bearing pedestal bearing is far lower than the temperature of the dry oil lubricated bearing, extending the life of the bearing.

3. The oil content in the oil chamber of the heavy bearing seat can be reduced by setting the outer diameter of the rolling bearing (on the premise of ensuring that the inlet and outlet devices have sufficient strength and torque). The connecting end face of the hollow shaft and the inlet and outlet spiral cylinder is provided with a flange, which is connected to the inlet and outlet spiral cylinder flange. On the thick and thin end face of the hollow shaft, a pressing bearing inner sleeve flange is provided to prevent the direction of the bearing from flying out.

Thin oil lubrication is superior to grease lubrication, minimizing the friction coefficient of bearings and achieving better power saving effects.

Remove the bearing jacket, prevent dust from entering the bearing box, maintain good oil quality, ensure the life of the bearing, and ensure safe and reliable operation. The diameter of the hollow shaft of the rolling bearing part becomes thicker, and the diameter distance between the rolling bearing and the spiral cylinder of incoming and outgoing materials becomes larger, which plays a certain role in heat insulation and cooling. The diameter of the rolling bearing increases, which is different from the average outer diameter of the hollow shaft. Using a thin oil lubrication chamber has certain effects on improving the thin oil level and reducing thin oil spillage. This cage has a certain blocking effect on external intrusion objects (moisture, dust, etc.), but is not sufficient as a sealing device, especially when the sealing performance requirements are particularly high, using contact rubber sealing rings (such as deep groove ball bearings, bearing units) or other sealing structures.