Pay attention to the problem of spherical roller bearings
Spherical roller bearing preload is carried out at room temperature, but in the work of the state, the drive shaft system of micro tensile temperature rise caused by bearing preload will change, therefore, pretightening force is set up, you should consider this factor. It needs the ability to size, speed, roller bearing pretightening force is reasonable using the settings and other conditions, to ensure the transmission of life. If the preload is too large, power consumption, and even lead to overheating. If the preload is too small, the body load, rolling axis, the gap between the outer ring under the action of bouncing, run, transmission accuracy, to reduce the noise increased, the effect of gear meshing, serious damage, teeth and bearing. Spherical roller bearing assembly, such as: according to the different internal direct compression bearing inner ring axial bearing pre tightening nut rotation, the inner and outer ring, to eliminate the gap, to achieve the purpose of bearing preload. Achieve common use: first, far beyond the preloaded bearings, the nut at the end, and then back 1 / 4 laps. Assembly method, this method has the advantage of less investment, simple, practical, consistent quality of the premise, tapered roller bearings, it can be used. 1. heating plates method will be placed in the bearing temperature of the electric heating plate 100 C a few minutes, this is the most simple, such as flip several times can make the bearing heat evenly, and the efficiency is high, the size of spherical roller bearings can be used. The 2. electric furnace heating automatic temperature control electric heating in the bearings within the closed, uniform heating, accurate temperature control, fast heating, heating for a number of occasions. Many bearing
3. induction heating method using induction heater can be fast, reliable and clean the roller bearing heated to the required temperature, this is especially suitable for the inner ring tightly matched with the occasion, because heating the inner ring and the outer ring is rarely so, you can more easily on the shaft, easily into the seat hole. 4. by electric light bulb heating method 50W bulb heating roller bearing, can ensure the heating temperature at 100 degrees Celsius, the smaller bearing Directly on the light bulb, can be placed in the cone bearing large bulb cover, the tapered cover can prevent lamp heat dissipation, and the uniform heating cone can adjust up or down, to adapt to the different sizes of the bearing heating if using far infrared bulb within certain range, pay attention to lighting should be down to avoid infrared rays is not to the eyes of the light bulb light bulb energy-saving heating method is applicable to small and does not require constant number; to bearing heated occasions, usually light bulbs can also be used for lighting, and does not need any additional equipment.
5. oil tank heating method which is used widely in traditional heating method, metal mesh is arranged at the bottom of the oil groove 50~70mm, bearing placed online, large bearing used hook lift bearing should not be placed directly on the bottom of the channel, to prevent the bearing contact parts of the tank bottom of the local heating is too high, or bottom precipitation dirt into the bearing oil groove heat injection method The important points are as follows, using non corrosive thermal stability of mineral oil, it is best to transformer oil, oil and containers should be kept clean and capacity of the tank should be heating roller bearing size and the amount of oil, if the container is too small, at the time of continuous operation, a place bearing oil temperature quickly drop, the effect is not good.
