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What are the types of bearing seals?
Source: China Bearing Network Time: 2014-10-18
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The sealing type of the bearing is to make the bearing adhere to outstanding smooth conditions and normal working environment; to fully utilize the bearing function; to extend the service life; it is necessary to have a suitable seal for the rolling bearing; to avoid leakage of the smoothing agent and dust, moisture or Intrusion of other dirt.
The seal of the bearing can be divided into two types: self-contained seal and external seal. The so-called bearing self-contained seal is to make the bearing itself into a sealing function device. For example, the bearing has a dust cover, a sealing ring, etc. This seal takes up a lot of space.沧安鹦斗奖悖悖辉旒垡旒垡冉.
The so-called bearing plus sealing function equipment; is to make a sealing device with various functions inside the equipment end cover.
There are several main factors to consider when selecting a bearing seal:
1. Bearing smoothing agent and variety (smooth grease and smooth oil),
2. Bearing working environment; occupying a large space.
3. The support layout of the shaft is strong; the viewpoint error is allowed,
4. The circumferential speed of the sealing surface,
5. Bearing operating temperature,
6. Making money.
The external seal is divided into two types: non-touch type and touch type. The description is as follows:
1) Non-touch seal Non-touch seal is the seal that does not touch the parts with its relative movement; and the seal with proper clearance. This type of seal; almost no conflict heat in the operation; no wear; uniquely suitable for high speed And high temperature occasions. Non-touch seals are commonly used for voids; labyrinth and washers are not the same as the layout;
The gap of the non-touch seal is preferably as small as possible.
2) Touch-type seal Touch seal is a seal that seals and moves relative to its moving parts without gaps. This seal is directly touched by the seal and the cooperation piece; it has a large conflict in the operation; the heat is also large; Smoothness is bad; the touch surface is easily worn; then the sealing effect and function are reduced. Therefore, it is only suitable for medium and low speed working conditions. Touch seals are commonly used in the form of felt seals, cup seals, etc.; occasion.
According to the bearing operation conditions and the working environment, the sealing degree is required; in engineering design, it is often used to apply various sealing methods to achieve better sealing effect.
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