Bearing seal

Keep good lubrication condition in order to make the bearing ( 挑剑) And the normal work, 工作) Environment, give full play to the performance of bearing ( 兴能) And prolong the life cycle of rolling bearings must have appropriate sealing, to prevent ( fáng zhǐ) Lubricant leakage and the invasion of the dust, moisture or other contaminants. Bearing ( 轴承) The seal ( 密封) Can be divided into two categories, own seal and seal. The so-called bearing with seal is made bearing itself ( zhì zào) Into a sealing device ( 设备) . Such as bearing with dust cover, sealing ring, etc. This kind of sealing footprint ( 空间) Small, easy installation and disassembly, cost is low. The so-called bearing and sealing device, is made within an installation end cover ( zhì zào) Into various performance of sealing device. The choice of bearing and seal should consider the following several major factors: 1. Bearing lubrication ( lubrication) Agent and type ( Lubricating oil and lubricating oil) ； 2. Bearing work environment, take up the space ( 空间) The size of the; 3. Shaft supporting structure advantages, allowing the angular deviation; 4. The circumference of the sealing surface speed; 5. The working temperature of bearing; 6. The manufacturing cost. Plus seal is divided into non-contact and contact. Bearing the use of clean environment for bearing is very important. Such as cross section thin-walled bearing ring rotation surface and rough surface precision of the rolling element is about 1/10 microns, this smooth surface of the ball if polluted, its influence is very serious. Points above are as follows: 1) Non-contact seal ( 密封) Non-contact seal is seal and its relative motion parts don't contact, and there is proper clearance seal. Bearing the use of clean environment for bearing is very important. Such as cross section thin-walled bearing ring rotation surface and rough surface precision of the rolling element is about 1/10 microns, this smooth surface of the ball if polluted, its influence is very serious. This form of seal, almost do not produce friction heat in the work, no wear and tear, especially suitable for high speed and high temperature occasion. Commonly used non-contact seal clearance, all kinds of different structure forms, such as type labyrinth and washer respectively applied in different situations. Non-contact seal clearance is better to as small as possible. 2) Contact sealed contact seal is sealed with relative motion of the parts in contact and no gap seal. Such sealing to seal by direct contact with mating parts, in the work, 工作) The friction is bigger, calorific value ( 热) Also big, easy to cause poor lubrication, contact friction losses, resulting in seal ( 效果) And performance degradation. Therefore, it is only applicable to medium and low speed working conditions. Contact sealed commonly used have felt seal, cup sealing structure (such as 结构) Form, used in different situations. According to the bearing working condition and working environment requirement for sealing in engineering design, Design) Is often on the comprehensive use of various seal form, in order to achieve better sealing effect. A: bearing ring production? Next article: the application of the bearing material