3 row roller slewing bearings in stock

How to choose the roller length of the 3 row roller slewing bearing?

Slewing bearing, also called slewing bearing, plays an important role as a transmission component in many mechanical equipment. Among them, 3 row roller slewing bearings are suitable for occasions with large axial load, radial load and large overturning moment.

For example, in some large construction machinery and equipment, three-row roller slewing bearings are usually selected.

There are many standard models of 3 row roller slewing bearings. If the standard model cannot meet the load requirements, a non-standard design is required, that is, the load of the slewing bearing is increased by increasing the diameter of the rollers. load.

The super-large diameter 3 row roller slewing bearing can increase the load by lengthening the length of the roller. The length of the contact with the raceway increases after the length of the roller, and the load of the roller naturally increases.

There are many standard models of 3 row roller slewing bearings. If the standard model cannot meet the load requirements, a non-standard design is required, that is, the load of the slewing bearing is increased by increasing the diameter of the rollers. load.

The super-large diameter 3 row roller slewing bearing can increase the load by lengthening the length of the roller. The length of the contact with the raceway increases after the length of the roller, and the load of the roller naturally increases.

Extended rollers can be used on large-diameter slewing rings, but not on small-diameter slewing rings. The channel of the 3 row roller slewing bearing is a straight-line plane raceway. On the small-diameter circular plane raceway, the linear velocity difference between the two ends of the long roller is large.

The rolling of the child in the raceway is not normal rolling. In the case of sufficient lubrication, it is rotating and creeping. However, if there is no restraint of the cage, the rollers will run horizontally and tilt in the channel, which will seriously affect the use.

In order to reduce the rolling of the rollers in the raceway, a long roller can be divided into two sections, and the extra long rollers can also be divided into three sections, and the flat rollers can be arranged in two or three rows side by side with an integral or segmented cage.

so as to avoid the linear velocity difference being too large and the rollers from creeping seriously.

When we need to increase the load of the 3 row roller slewing bearing by increasing the roller diameter or increasing the roller length, we need to choose according to the actual situation.