Keywords: Spherical roller bearing
Spherical roller bearing preloading force is carried out at room temperature, but in the working state, the system micro-stretching temperature rise generated by the drive shaft, bearing preloading force will change, therefore, the preloading force set, should take this factor into account. It requires the ability to size, speed, and other conditions set by the reasonable use of spherical roller bearing preload to ensure transmission life. If the preload is too large, the power consumption will increase, which will lead to overheating. If the preload is too small, the body load, the shaft rolling, the gap between the outer ring under the action, produces runout, running, transmission accuracy, to reduce the increase of noise, affects the gear meshing, serious damage when teeth and bearings.
According to different Spherical roller bearing assembly, such as: directly rotate the bearing pretightening nut of the inner ring of the inner bearing by axial compression, and the inner and outer ring, in order to eliminate the gap and achieve the purpose of bearing pretightening
- Heating method of electric heating plate The bearing can be placed on the electric heating plate with the temperature of 100℃ for a few minutes. This method is relatively simple.
- The electric furnace heating method places the bearing in the closed automatic temperature control electric furnace for heating. The heating is uniform, the temperature control is accurate and the heating is fast, which is suitable for heating many bearings in a batch.
- Induction heating method The induction heater can quickly, reliably and cleanly heat the Spherical roller bearing to the desired temperature, which is especially suitable for the occasions where the inner ring is tightly matched. Because only the inner ring is heated, and the outer ring is rarely heated, it can be easily installed on the shaft and easily loaded into the seat hole.
- Light bulb heating Use of 50 w bulb heating spherical roller bearings, can guarantee the heating temperature about 100 ℃, the smaller the bearing can be directly on the bulb, larger bearings taper enclosure may be placed on a light bulb, conical cover can prevent heat losses, light bulbs and uniform heating cone cover can be adjusted up and down, in a certain heating range that can adapt to different size of bearing if using infrared light bulbs, pay attention to The direction of the bulb should be down, so as not to harm the infrared rays of the eyes of the bulb can be energy-saving bulb heating method is suitable for a small number of less often needed; To the occasion of bearing heating, usually the bulb can also be used for lighting, in addition to the need for any other equipment.
- Oil tank heating method This is a widely used traditional heating method, the bottom of the tank from 50 to 70 mm in a metal mesh, bearing on the Internet, large bearing to hoist hooks in the bearing should not be placed directly on the bottom of the channel, in case of contact with the bottom of the channel bearing parts of the local heat is too high, or the bottom of the channel to precipitate the dirt into the bearing oil tank heating attention points as follows, no corrosive thermal stability good mineral oil, should be used The capacity of the oil groove should be determined by the size and amount of oil of the heated aligning roller bearing. If the container is too small, in continuous operation, the temperature of the oil in the bearing will soon drop, and the effect is not good.
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