Bearing role at its role should be supported, namely literal interpretation for the bearings, but this is just a part of its role in supporting the essence of which is to be able to bear radial load.
Can also be understood as it is used for a fixed axis.
Bearing fast automatic optimum selection is included.
Is make it can only achieve a fixed axis rotation, and to control the movement of the axial and radial.
Motor without bearing won't work.
Because axis movement in any direction, and when the motor work should make rotation shaft only.
Theoretically impossible transmission effect, not only that, the bearing can also affect the transmission, in order to reduce the impact on the high-speed spindle bearings must implement good lubrication, some have lubrication bearing itself, called pre lubricated bearing, and most of the bearings must be lubricating oil, is responsible for running at high speed, not only because of friction increases energy consumption, more terrible is easy to damage the bearings.
The sliding friction into rolling friction is one-sided, because there is a thing called sliding bearing.
Lubrication of rolling bearing lubrication has reduce bearing internal friction and wear, prevent burning stick;
Prolong the service life;
Discharge frictional heat, cooling, prevent hotbox, prevent the aging oil;
Also has to prevent foreign matter into the bearing internal, or to prevent rust and corrosion.
Lubrication method of bearing lubrication method, divided into grease lubrication and oil lubrication.
In order to make the bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method.
If only consider lubrication and oil lubrication.
However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare the pros and cons of grease lubrication and oil lubrication.
To pay special attention to the dosage, lubricating oil or grease lubrication, too little quantity insufficient lubrication, affecting the service life of bearing too much will produce large amount of resistance, impact speed.
The sealed bearing seal can be divided into two categories, own seal and seal.
The so-called bearing with seal is made bearing itself into a sealing device.
Such as bearing with dust cover, sealing ring, etc.
This seal take up the space is small, easy installation and disassembly, cost is low.
Alleged bearing and sealing device, it is inside the installation end cover manufacturing into a sealing device has a variety of performance.
Bearing and seal is divided into the non-contact seal and contact seal.
The non-contact seal is suitable for high speed and high temperature occasion, such as clearance type, labyrinth and gasket type different structure forms.
Contact seal is suitable for the medium and low speed working conditions, commonly used have felt seal, cup sealing structure, etc.
According to the bearing working condition and working environment requirement for sealing on the engineering design is often integrated use of various seal form, in order to achieve better sealing effect.
Choice of bearings and seals should consider the following several major factors: 1, the bearing lubricant and types (
Grease and oil)
;
2, bearing work environment, to take up the size of the space;
3, shaft supporting structure advantages, allowing the angular deviation;
4, circumferential speed of the sealing surface;
5, the working temperature of bearing;
6, the manufacturing cost.
