Bearings are an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.
Bearing classification
Sliding has no inner and outer rings and no rolling elements. They are generally made of wear-resistant materials. It is often used in low-speed, light load, and mechanical rotating parts where lubricating oil and maintenance are difficult.
Spherical. The sliding contact surface of spherical is spherical and is mainly suitable for swing motion, tilting motion and rotational motion.
Rolling is divided into radial and thrust them according to the load direction or nominal contact angle they can bear. The radial contact it is radial with a nominal contact angle of 0, and the radial angular contact it is a radial with a nominal contact angle greater than 0 to 45. Axial contact it is are thrust s with a nominal contact angle of 90°, and thrust angular contact they are thrust them with a nominal contact angle greater than 45 but less than 90°.
Flange have a flange flange on the outer wheel. The characteristic is that it can simplify the host structure, reduce the size of the host, and make them easier to position.
Mounted
A radial is a component that is combined with a seat. There is a bottom plate for mounting screws on the support surface parallel to the axis of the it
Combined is a rolling that is composed of two or more them structures mentioned above in one set of them. Such as needle roller and thrust cylindrical roller combined with them, needle roller and thrust ball combined, needle roller and angular contact ball combined bearings, etc.
Characteristics of bearing steel:
1. Contact fatigue strength
Under the action of cyclic loads, they are prone to fatigue damage on the contact surface, that is, cracks and peeling, which is the main damage mode of it . Therefore, in order to improve the service life of the it , the steel must have high contact fatigue strength.
2. Wear resistance
When the it is working, not only rolling friction but also sliding friction occurs between the rings, rolling elements and cages, causing constant wear of the its parts. In order to reduce the wear of its parts, maintain accuracy and stability, and extend service life, its steel should have good wear resistance.
3. Anti-rust performance
In order to prevent its parts and finished products from being corroded and rusted during processing, storage and use, steel is required to have good anti-rust properties.
Bearing function
In terms of its function, it should be supported, which is literally used to support the shaft, but this is only part of its function. The essence of support is to be able to bear radial loads. It can also be understood that it is used to fix the shaft. Its quick and easy automatic selection is included. It is to fix the shaft so that it can only rotate, and control its axial and radial movement. A motor wouldn't work at all without it. Because the shaft may move in any direction, and the motor requires the shaft to only rotate when working. Theoretically speaking, it is impossible to realize the transmission function. Not only that, they will also affect the transmission. In order to reduce this impact, good lubrication must be achieved on the them of high-speed shafts. Some of them are already lubricated, which are called pre-lubricated. Most of them must be lubricated. When running at high speed, friction will not only increase energy consumption, but what is more terrible is that them can easily be damaged. The idea of converting sliding friction into rolling friction is one-sided, because there is something called a sliding.
lubricating
The purpose of lubrication of rolling is to reduce internal friction and wear of them and prevent burning; extend its service life; discharge frictional heat and cooling, prevent the them from overheating and prevent the lubricating oil from aging; and also prevent foreign matter from invading the inside of it, or prevent rust and corrosion. The effect.
Lubrication method
It lubrication methods are divided into grease lubrication and oil lubrication. In order for the it to function well, first of all, it is necessary to choose a lubrication method suitable for the use conditions and purpose of use. If only lubrication is considered, the lubricity of oil lubrication is dominant. However, grease lubrication has the advantage of simplifying the structure around the it. Let’s compare the pros and cons of grease lubrication and oil lubrication. Pay special attention to the amount when lubricating, whether it is oil lubrication or grease lubrication. If the amount is too little, insufficient lubrication will affect the life of it. If the amount is too much, it will produce large resistance and affect the speed.
Seal
It seals can be divided into two categories: self-contained seals and external seals. The so-called itself-sealing means that itself is made into a device with sealing performance. Such as its with dust covers, sealing rings, etc. This kind of seal takes up very little space, is easy to install and disassemble, and has a relatively low cost. The so-called external sealing performance device is a sealing device with various performances made inside the installation end cover. It external seals are divided into two types: non-contact seals and contact seals. Among them, non-contact seals are suitable for high-speed and high-temperature occasions, and have different structural forms such as gap type, labyrinth type and gasket type. Contact seals are suitable for medium and low-speed working conditions. Commonly used structures include felt seals, cup seals and other structural forms.
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