Knowledges

The basic structure of rolling bearingsThe working principle of rolling bearings is to replace sliding friction with rolling friction, and their structure is generally a mechanical basic component composed of two rings, a set of rolling elements, and a cage. Due to different working conditions of rolling bearings, there are different requirements for the structure, load capacity, and performance of the bearings. Therefore, rolling bearings also have various structures. However, the most basic structure of rolling bearings is composed of an inner ring, an outer ring, rolling elements, and a cage.

We need to determine whether the bearing can continue to be used, mainly considering the mechanical performance, degree of damage, importance, operating conditions, and the period until the next maintenance of the bearing. Generally speaking, if there are several situations with a bearing, it should be replaced with a new one and cannot continue to be used.

1、 Sensory method 1: Rotate the bearing by hand and observe that the bearing rotates smoothly and flexibly without any jamming phenomenon. 2. For single row radial ball bearings, the outer ring of the bearing can be shaken by hand. Even if the radial clearance is only 0.01mm, the axial movement of the top point of the bearing is still 0.10-0.15mm.

The production process of different ball bearings varies depending on the type, structure, material, batch size, technical requirements, and tolerance level of the rolling bearings. 1、 Processing process: 1. Ring: According to the raw materials and blank forms of the inner and outer rings of the bearing, the entire processing process of the inner and outer rings is as follows: bar or tube material (some bar materials need to be forged, annealed, and normalized) - turning processing - heat treatment - grinding processing - precision grinding or polishing - final inspection of parts - rust prevention - warehousing - (to be assembled and matched)

Compared with sliding bearings, rolling bearings have the following advantages: 1. Rolling bearings have achieved universality, serialization, and standardization, making them more suitable for large-scale production and supply, and are very convenient to use and maintain; 2. The friction coefficient of rolling bearings is smaller than that of sliding bearings, resulting in higher transmission efficiency. The friction coefficient of sliding bearings is generally 0.08-0.12, while the friction coefficient of rolling bearings is only 0.001-0.005; 3. Rolling bearings have high operational accuracy, with small internal clearances and high machining precision for each component. Rolling bearings can also increase their rigidity by preloading. This is very important for precision machinery; 4. Rolling bearings not only have high mechanical performance and long service life,