2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42
Currently, a bearing is a mechanical product that is part of the support. This mechanism is intended for additional support of the axis, shaft and other structures, helps to strengthen and fix the position of other structural elements in space. In addition, the bearing can provide linear movement, rolling and rotation with the lowest resistance value, and also provides load transfer to various structural parts. A support equipped with a thrust bearing has a special name - a thrust bearing.
Classification includes several basic types that differ in the principle of action:
- Plain bearing.
- Rolling bearing.
- Gas static bearing.
- Gas dynamic bearing.
- The bearing is magnetic.
- Hydrostatic bearing.
- Hydrodynamic bearing.
The first two types are the most widely used, since they are used in the engineering field.
Let's take a closer look at the rolling bearing. Traditionally, it consists of several structural elements: two rings with grooves cut out on them, rolling elements that move along these grooves, a separator (separates the rolling elementsand fills the gaps between them, and also directs their movement).
In some cases it is possible to manufacture bearings without a cage. Such a rolling bearing is used in cases where it is necessary to provide a large load capacity. A distinctive feature of this type is the increased number of rolling elements used and the low value of the limiting speed.
The rolling bearing works mainly due to the rolling friction forces that arise, since the remaining forces that arise are insignificant. This effect reduces friction losses and significantly reduces the wear of this mechanism.
Distinguish between closed and open bearings. The former are equipped with protective caps, which prevent the leakage of lubricant and the ingress of foreign bodies, the latter, if handled carelessly, can fail quickly enough, since they are subject to all of the above factors.
The main parameters of this type of bearings include:
- Maximum load (both static and dynamic).
- Noise pollution level.
- Accuracy class.
- Dimensions of rolling bearings.
- Requirements for lubricants.
- Use resource.
In addition, a rolling bearing can be loaded in different directions, such as perpendicular to the axis (radial) or parallel (axial).
All key features,which can be used to judge the purpose of this mechanism are summarized in its symbol. The marking of rolling bearings is standardized in accordance with the current GOST rules. The symbol traditionally consists of a main and an additional, each of which includes an alphanumeric cipher. The peculiarity of reading bearing designations is that it is carried out from right to left.
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