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Matters needing attention when sealing bearings

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The seal of the bearing is to make the bearing adhere to outstanding smooth conditions and normal working environment; give full play to the bearing function; 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 sealing and external sealing. The so-called self-contained bearing is formed by the bearing itself to form a sealing function device. For example, the bearing has a dust cover, a sealing ring, etc. The kind of seal takes up a lot of space.
The so-called bearing plus sealing function equipment; is to form a sealing device with various functions in the internal end of the equipment end cover.
The selection of bearing seals should consider the following primary factors:
Bearing smoothing agent and variety (smooth grease and smooth oil), bearing working environment; occupying a large space. Restoring С С 峁褂 峁褂 悖 悖 悖 斫 绕 绕 绕 绕 绕 绕 绕 绕 绕ぷ魑露龋圃斐杀.
The external seal is divided into two types: non-touch type and touch type.
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. The seal of this method; 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, etc., different layout methods; different applications are not used. Non-touch seals are 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 easy to wear; 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 layout of felt seals and cup seals; occasion.
According to the bearing working condition and the working environment, the sealing degree is required; in engineering design, various sealing methods are often applied to achieve better sealing effect.
When the bearing rotates at a high speed, especially when the speed is close to or exceeds the limit speed recorded in the scale table, the following should be paid attention to the following:
(1) Using fine bearings,
(2) Analyze the internal clearance of the bearing (think about the reduction of the internal clearance of the bearing due to temperature rise),
(3) Analyze the type of data that adheres to the frame (for high-speed rotation; suitable for copper alloy or phenolic resin to cut the holder. Others also have a synthetic resin molding holder for high-speed rotation),
(4) Analyze the smooth method (select the smooth method suitable for high-speed rotation, such as smooth cycle, spray gliding, smooth oil mist and smooth oil and gas.

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