1. Tapered roller bearing repair should pay attention to what? After repairing the single, double and four-row tapered roller bearings with inner and outer raceway fatigue, how can we achieve bearing rotation without stuck?
A: As long as the inner and outer raceways of the tapered roller bearing and the extension lines of the bus bars on the surface of the roller can be converged at one point, the pure rolling conditions of the tapered roller in its raceways can be met. If the rolling body is not pure rolling, after the work is subjected to load, it will lead to a slight sliding friction performance at one end of the roller, which will lead to an increase in temperature and accelerated wear on the rolling contact surface as soon as possible!
2. How to obtain the radial clearance of single-row tapered roller bearings?
A: First of all, single-row tapered roller bearings have no shaft and radial clearance when they leave the factory.
The customer can only calculate the radial clearance of the system during the installation process by installation experience, perception or measuring the axial movement of the system with a meter.
3. What should be paid attention to when installing four-row tapered roller bearings?
A: The width of the two outer spacer rings of the four-row cone is to determine the size of the bearing internal shaft and radial clearance. This width is a comprehensive reaction of the adjacent inner and outer raceway diameters, roller diameters and axial clearance, and it is not possible to channel.
Because the part is also a thin-walled part, if the system pretension force is too tight on the part, the part is likely to have the possibility of "bending" and "shrinking", which in turn causes changes in the factory clearance. It is easy to cause the phenomenon of two columns overload and two columns light load. It becomes a double-column cone, without really playing the role of a four-column cone.
4. What should we pay attention to when installing two-way thrust tapered roller bearings?
A: The outer spacer of the bearing also determines the axial clearance of the bearing, and the width of the part is also a comprehensive reaction to the shaft, the height of the seat raceway, the height of the guard edge, the diameter of the roller and the axial clearance. It is also a one-to-one correspondence, can not be channeled. This part is also a thin-walled part, if the system preload is too large, it will also cause the "bending" and size "reduction" of the part, if the axial clearance disappears, the bearing will lose the ability to rotate.
If the system preload force is too small, or even no preload force, the axial clearance of the bearing is greater than the factory clearance, and the bearing does not play a positioning role on the system.
5. On steel rolling equipment, how about the positioning ability of deep groove ball bearings, four-point angular contact ball bearings, four-row tapered roller bearings and two-way thrust tapered roller bearings?
A: Compared with deep groove ball bearings and four-point contact bearings, because deep groove ball bearings have no contact Angle, the positioning ability of deep groove ball bearings is not as good as that of four-point contact ball bearings.
Two-way thrust cone bearings belong to line contact, and four-point contact ball bearings belong to point contact, so the positioning ability of four-point contact ball bearings is not as good as that of two-way thrust cone. However, the high revolution capacity of the four-point contact ball bearing is greater than the two-way thrust cone.
Because the axial clearance of the four-row tapered roller bearing is greater than the radial clearance, the positioning ability of the bearing is not as good as that of the bidirectional thrust cone.
However, four-row tapered roller bearings can bear the combined load of axial and radial loads at the same time, while two-way thrust tapered roller bearings can only bear axial loads.
6. What are the use characteristics of spherical roller bearings?
A: Because the outer raceway of the spherical bearing is a part of the ball, the bearing is allowed to have a 0-2° Angle between the force direction and the radial plane of the bearing when it is working, that is, the bearing can still work normally when the shaft is slightly bent.
However, since the axial clearance of the bearing is usually 2.5 times that of the radial clearance, the bearing cannot play an axial positioning role in the system. When the axial force is too large, it is easy to cause a column of overload and a column of light load.
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