The function of bearing matching is to make the stationary and rotating rings of the bearing respectively solidify with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the mounting position, thereby achieving the basic task of transferring load and defining the position of the moving system relative to the stationary system in a rotating state. On the shaft and in the bearing pedestal, rolling bearings require their positions to be fixed in three directions: radial, axial, and tangential. Radial and tangential positioning is achieved through tight fitting of the bearing collar, while axial positioning is only achieved through tight fitting in a few cases; Generally, axial limit parts such as end caps and retaining rings are used to limit the axial position within the clearance range.

Bearing is an important accessory in machinery, which can also be said to be a mechanical joint. Like us humans, if we don't have joints, it's not possible. If we don't have joints, we'll be paralyzed. What's the use of that? "That would be of no use, and the same is true for machinery. Without bearings, machinery cannot be used, so machinery cannot live without bearings. Without bearings, it cannot survive, which is equivalent to waste.". The use method of bearings is very complex, and some rolling bearings need to be used together. This knowledge is only known to ordinary technical personnel, but it is definitely unknown to ordinary people. Let's introduce the use and requirements of partial bearings from this split bearing seat manufacturer, and lay a foundation for you to become familiar with bearings in the future.

The following four points should be emphasized when selecting a fit

(1) The circumferential surface of the bearing collar should be well supported and evenly stressed to reduce deformation and fully exert the bearing's bearing capacity。

(2) The ferrule cannot slide along the tangent direction in its mating surface, otherwise it will damage the mating surface.

(3) The free end bearing must be able to adapt to the length changes of the shaft and bearing housing hole, that is, it must have the ability to adapt to the axial position within a certain range of swimming.

(4) Attention must be paid to making bearing installation and disassembly simple, saving labor, time, and expenses. The bore diameter of the bearing bush is slightly larger than that of the journal. When stationary, the journal is located at the lower part of the bearing bush and directly contacts the inner surface of the bearing bush, forming a wedge shaped gap between the bearing bush and the journal. When the rotor starts to rotate, direct friction occurs between the journal and the bearing shell. However, as the journal rotates, the lubricating oil adheres to the surface of the shaft due to its viscosity and is brought into the wedge-shaped gap between the journal and the bearing shell.

As the rotational speed increases, the amount of oil brought in increases. As the outlet area of the oil flow in the wedge gap continues to decrease, the oil pressure continues to increase. When this pressure increases enough to balance the full force of the rotor on the bearing pad, the journal is supported by the oil film and suspended on the oil film for rotation, thereby avoiding direct metal friction and establishing liquid friction.