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| News details |
Spherical roller bearings seal type which?
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| Time：2016.11.04 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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In order to maintain good bearing lubrication conditions and normal working environment, give full play to the performance of the bearing to extend the service life, small series that should be self-aligning roller bearings must be properly sealed to prevent the leakage of lubricants and dust, water Gas or other contaminants. In this case,
Spherical roller bearings can be divided into self-sealing and external sealing two categories. The so-called self-bearing bearing is to seal itself into a sealing device performance. Such as bearings with dust cover, seals and so on. This seal space is very small, easy installation and disassembly, the cost is relatively low.
The sealing performance device for a bearing is a seal device having various properties, such as an end cap or the like. The self-aligning roller bearings sealed choice Xiao Bian that should consider the following six major factors.
1, bearing lubricants and types (grease and lubricants);
2, bearing the work environment, the size of space;
3, the bearing structure of the advantages of the axis, allowing the angle deviation;
4, the circumferential speed of the sealing surface;
5, the bearing temperature;
6, manufacturing costs.
Plus sealed is divided into non-contact and contact two. As follows:
1) Contact seal
A contact seal is a seal that seals a part in contact with its relative movement without a gap. This seal as a result of the direct contact with the sealing parts, friction in the work of large, heat is also large, easy to cause poor lubrication, the contact surface is easy to wear, resulting in sealing performance and performance degradation. Therefore, it only applies to medium and low speed operating conditions. Contact seals are commonly used with felt seals, cup seals and other structural forms, used in different occasions.
2) non-contact seal
A non-contact seal is a seal in which the seal does not come into contact with its relative moving parts and has a suitable clearance. This form of seal, in the work almost no friction heat, no wear, especially for high-speed and high temperature applications. Non-contact seal commonly used gap, labyrinth and gasket, and other various structural forms, respectively, applied to different occasions. The gap of the non-contact seal is preferably as small as possible.
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