The preload of the self-aligning roller bearing is carried out at room temperature, but it is in working condition. The driving shaft generated by the system's micro stretching temperature rise will change the preload of the bearing. Therefore, this factor should be taken into account when setting the preload.

It requires the size of the capacity, speed, and reasonable use of self aligning roller bearing preload for other conditions to ensure transmission life. If the preload is too large, power consumption may even lead to overheating. If the preload is too small, the body load, shaft rolling, and the gap between the outer rings cause jumping, running, and transmission accuracy to reduce noise increase, which affects gear meshing and severely damages teeth and bearings.

According to the assembly of different self-aligning roller bearings, such as directly compressing the inner ring of the bearing by axial compression, the bearing pre tightening nut rotates, and the inner and outer rings eliminate the gap to achieve the purpose of bearing pre tightening force. Realize common use: *, far beyond the pre installed bearing, the nut * is then turned back 1/4 turn. Secondly, the advantages of this assembly method are low investment, simplicity, and practicality. As long as high-quality roller bearings are ensured, the following methods can be used for heating.

1. The electric heating plate method involves placing the bearings on an electric heating plate with a temperature of 100 ℃ for a few minutes. This method is simple, and can be used to evenly withstand the heat on the shaft if flipped several times, with high efficiency. This method can be used for both large and small self-aligning roller bearings.

2. The electric furnace heating method places bearings in a closed automatic temperature control electric furnace for heating, ensuring uniform heating, accurate temperature control, and fast heating. It is suitable for heating many bearings in a batch.

3. Induction heating method, using an induction heater, can quickly, reliably, and cleanly heat the self-aligning roller bearing to the required temperature. This is particularly suitable for situations where the inner ring is tightly matched. As only the inner ring is heated, the outer ring receives little heat, making it easier to install on the shaft and easily fit into the seat hole.

4. The electric bulb heating method uses a 50W electric bulb to heat the self-aligning roller bearing, which can ensure a heating temperature of around 100 ℃. The smaller bearing can be directly placed on the bulb, while the larger bearing can be placed inside the conical cover of the bulb. The conical cover can prevent heat loss of the bulb and ensure even heating. The conical cover can be adjusted up and down to adapt to heating different sizes of bearings within a certain range. If using a far-infrared bulb, the direction of the bulb should be downward, To prevent infrared radiation from harming human eyes, this type of light bulb can save energy. The heating method of the light bulb is suitable for small quantities but not frequently needed; In situations where bearings need to be heated, light bulbs can also be used for lighting purposes, and no other equipment is required.

5. The oil groove heating method is a widely used traditional heating method. A metal mesh is set at a distance of 50-70mm from the bottom of the oil groove, and the bearings are placed on the mesh. Large bearings should be lifted with hooks, and the bearings should not be directly placed at the bottom of the groove to prevent local overheating of the bearing parts that contact the bottom of the groove, or the dirt deposited at the bottom of the groove entering the bearing oil groove. The key points of the heating method are as follows: non corrosive mineral oil with good thermal stability should be used, especially transformer oil, Both the oil and the container should be kept clean. The capacity of the oil groove should be determined by the size and amount of oil of the heated self-aligning roller bearing. If the container is too small, during continuous operation, the temperature of the bearing oil will quickly decrease as soon as it is inserted, resulting in poor results.