What Problems Should Be Paid Attention To When Using Spherical Roller Bearings!

The preload of the spherical roller bearing is carried out at room temperature, but in the working state, the bearing preload of the drive shaft generated by the rise of the micro-tensile temperature of the system will change, so the preload of the setting should take this factor into account.

It requires the ability to set the size, speed, and other conditions of the rational use of spherical roller bearing preload to ensure the life of transmission. If the preload is too large, power consumption may even lead to overheating. If the preload is too small, the body load, the shaft rolls, and the gap between the outer rings is under the action of producing runout, running, and transmission accuracy to reduce the increase in noise, which affects the gear meshing, and seriously damages the teeth and bearings.

According to the assembly of different spherical roller bearings, such as: the bearing preload nut of the inner ring of the inner ring of the inner bearing is directly compressed axially by rotation, and the inner and outer rings are rotated to eliminate the gap and achieve the purpose of bearing preload. Achieve common use: first, far more than the pre-installed bearing, the nut last, and then back 1/4 turn. The advantages of this method are low investment, simplicity, practicality, consistency of excellent quality under the premise that tapered roller bearings can be used.

1. Electric hot plate heating method The bearing can be placed on the electric hot plate at a temperature of 100 °C for a few minutes, this method is the most simple, such as flipping several times can make the bearing heated evenly, and the efficiency is also high, the size of the spherical roller bearing can be used this method.

2. Electric furnace heating method The bearing is heated in a closed automatic temperature control electric furnace, which is evenly heated, accurate temperature control, and fast heating, which is suitable for heating many bearings in a batch.

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 very little heated, so that it can be easily installed on the shaft, and it is easy to be loaded into the seat hole.

4. Electric bulb heating method uses 50W electric bulb to heat the spherical roller bearing, which can ensure that the heating temperature is about 100 °C, the smaller bearing can be placed directly on the bulb, and the larger bearing can be placed in the conical cover of the bulb, the conical cover can prevent the heat loss of the bulb, and make the heating uniform The conical cover can be adjusted up and down, and can adapt to the heating of bearings of different sizes within a certain range If the far-infrared bulb is used, pay attention to the direction of the bulb should be downward, In order not to be detrimental to the eyes of the infrared, this bulb can be energy-saving, and the bulb heating method is suitable for small quantities and infrequent needs; When the bearing is to be heated, the bulb can also be used for lighting, and no other equipment is required.

5. Oil groove heating method This is a widely used traditional heating method, the oil tank is set up at the bottom of 50~70mm metal mesh, the bearing is placed on the net, the large bearing should be hoisted with a hook The bearing should not be placed directly at the bottom of the groove, in case the bearing part of the contact groove bottom is partially heated too high, or the dirt precipitated at the bottom of the groove enters the bearing oil groove heating method The key points of attention are as follows, mineral oil with good non-corrosive thermal stability should be used, preferably 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 oil volume of the heated spherical roller bearing, if the container is too small, in continuous operation, the oil temperature will drop quickly as soon as the bearing is put in, and the effect is not good.