What are the precautions for sphere roller bearing?

Pay attention to the problem
sphere roller bearing preload is carried out at room temperature, but in working condition, the drive shaft generated by the micro-tensile temperature of the system, the bearing preload will change, therefore, the preload set should take this factor into account.
It requires the ability to set the size, speed, and other conditions of the sphere roller bearing preload with reasonable use to ensure the life of transmission. If the preload is too large, the power consumption will even lead to overheating. If the preload is too small, the body load, the shaft rolls, the gap between the outer rings, resulting in jumping, running, transmission accuracy to reduce noise increase, affect the gear meshing, serious damage when teeth and bearings.

According to different sphere roller bearing assembly, such as: directly from the axial compression of the bearing preload nut of the inner ring of the internal bearing rotation, the inner and outer rings to eliminate the gap, to achieve the purpose of bearing preload. Achieve common use: first, far beyond the pre-assembled bearing, the last of the nut, and then back 1/4 turn. Assembly method, the advantage of this method is less investment, simple, practical, consistent excellent quality under the premise of tapered roller bearings, it can be used.
1. Electric heating plate heating method The bearing can be placed on the electric heating plate with a temperature of 100 °C for a few minutes, this method is the most simple, such as turning several times can make the bearing heat evenly, and the efficiency is also high, large and small spherical roller bearings can use this method.

2. Electric furnace heating method The bearing is placed in a closed automatic temperature control electric furnace for heating, which is evenly heated, accurate temperature control, and fast heating, which is suitable for a batch of occasions where many bearings are heated.
3. Induction heating method The use of induction heater can quickly, reliably and cleanly heat the spherical roller bearing to the required temperature, which is especially suitable for the occasion of tight fitting of the inner ring, because only the inner ring is heated, and the outer ring is heated very little, which can be easier to install on the shaft and easy to install in the housing bore.
4. Bulb heating method The use of 50W electric bulb heating sphere roller bearing, can ensure that the heating temperature is about 100 °C, smaller bearing can be placed directly on the bulb, larger bearing can be placed in the tapered hood of the bulb, the tapered hood can prevent the heat loss of the bulb, and make the heating uniform cone cover up and down can be adjusted, within a certain range can adapt to the heating of different sizes of bearings If far-infrared bulbs are used, pay attention to the direction of the bulb should be downward, So as not to make infrared rays detrimental to people's eyes, this bulb can save energy bulb heating method is suitable for small quantities and not often needed; To heat the bearing, the bulb can also be used for lighting without any other equipment.

5. Oil groove heating method This is a widely used traditional heating method, the oil groove is 50~70mm from the bottom of the metal mesh, the sphere roller bearing is placed on the net, large bearings to be lifted with hooks The bearing should not be placed directly at the bottom of the groove, in order to prevent the bearing part in contact with the bottom of the groove from being locally heated too high, or the dirt precipitated at the bottom of the groove enters the bearing oil groove heating method to pay attention to the following points, should use non-corrosive mineral oil with good thermal stability, preferably transformer oil, The capacity of the oil groove should be kept clean and the capacity of the spherical roller bearing being heated should be determined by the size and amount of oil, if the container is too small, in continuous operation, the oil temperature will drop quickly as soon as it is put in, and the effect is not good

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