What is the reason for the roller spherical bearing roller falling off

I don't know if you're talking about cylindrical roller bearings or spherical roller bearings, there is a difference between these two bearings, can you name the specific model. Did you say that the rollers fell out of the bearing? Of course, whether it is a cylindrical roller bearing or a spherical roller bearing, if it is found that the roller falls out of the bearing, this is sometimes encountered, of course, this is also caused by the unreasonable design and production of the bearing itself, and the roller falling out is generally related to the following aspects (taking the spherical roller bearing as an example, assuming that the bearing roller size is correct):

1.The size of the retainer hole (the diameter and depth of the hole, and the diameter of the center of the hole are unreasonable).

2.The diameter of the inner ring flange is unreasonable.

3.If the rollers fall out of the notch of the rollers on the flange of the inner ring, the notch size may not be reasonable.

4.If the bearing design is reasonable, but the process or processing is unreasonable during the production of the bearing, it will also cause the internal dimensions of the bearing to deviate, resulting in the occurrence of roller dropping.

In the case of cylindrical roller bearings, the situation is similar and will not be described in detail here.

In short, the simple phenomenon of bearing roller drop is closely related to the design and production of bearings, and has the influence of many factors. But in any case, the roller drop of the bearing indicates that there is still a certain quality problem in the bearing itself.

This phenomenon is very common, this is caused by the loosening of the cage socket, the rollers and cage of the spherical bearing can be turned out, and you can install the rollers again, and the rotation can be used when it is turned back. I really can't change it. I've got it here.

The use of needle roller bearings still makes it difficult for printer manufacturers to process high-precision jackets and for experienced installers to find the right needle roller group. To solve this problem, bearing manufacturers have developed roller bearing supports with integrated flanges in the outer ring.

Moreover, the flanged outer ring solves the problem of installation and lubrication for the printer. Its roller bearing support scheme has become the mainstream scheme of cylinder support in printing machines.

The fault phenomenon of rolling bearings is generally manifested in two ways, one is that the temperature of the bearing installation part is too high, and the other is that there is noise in the bearing operation.

1.The bearing temperature is too high.

When the mechanism is running, the part where the bearing is installed is allowed to have a certain temperature, and when the shell of the mechanism is touched by hand, it should be normal not to feel hot, otherwise it indicates that the bearing temperature is too high.

The reasons for the high temperature of the bearing are: the quality of the lubricating oil does not meet the requirements or deteriorates, and the viscosity of the lubricating oil is too high; The assembly of the mechanism is too tight (insufficient clearance); The bearing assembly is too tight; The bearing race rotates on the shaft or in the shell; overload; Fragmentation of bearings, cages or rolling elements, etc.

2.Bearing noise.

Rolling bearings are allowed to have a slight running sound during operation, if the noise is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.

The causes of noise in rolling bearings are complex, one of which is the wear of the mating surfaces of the inner and outer rings of the bearing. Due to this wear, the fit relationship between the bearing and the housing, and the bearing and the shaft is destroyed, causing the shaft to deviate from the correct position, and the shaft is abnormal when moving at high speed. When the bearing is fatigued, the metal on its surface peels off, which will also increase the radial clearance of the bearing and produce abnormal noise.

In addition, insufficient lubrication of the bearing, the formation of dry friction, and the breakage of the bearing can produce abnormal sounds. After the bearing is worn loosely, the cage is loose and damaged, and abnormal noise will also occur.

3.Bearing wear.

Rolling bearing wear is a common equipment problem in the process of shaft use, which is mainly caused by the metal characteristics of the shaft: although the metal has high hardness, it has poor concession (cannot be restored after deformation), poor impact resistance, and poor fatigue resistance, so it is easy to cause adhesive wear, abrasive wear, fatigue wear, fretting wear, etc. Most of the shaft wear is not easy to detect, only when the machine has high temperature, large beating amplitude, abnormal noise, etc., it will be noticed, but by the time people notice, most of the rolling shafts have been worn, resulting in machine shutdown.