The details of the advantages of tumbling imported bearings

Source: Bearing network time: 2014-05-20

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1. The friction coefficient of the port bearing is smaller than that of the sliding bearing, and the transmission efficiency is high. Generally, the friction coefficient of the sliding bearing is 0. 08-0. 12, and the friction coefficient of the tumbled imported bearing is only 0. 001-0. 005;
2. The imported bearings have been standardized, serialized and generalized, suitable for mass production and supply; easy to use and repair,
3. The imported bearings are made of imported bearing steel and processed by heat. Therefore, the tumbling imported bearings not only have higher mechanical properties and longer service life, but also can save the more expensive non-ferrous metals used in the manufacture of sliding imported bearings. ;
4. The internal clearance of the imported bearings is very small, and the machining precision of each part is high. Therefore, the working precision is high. Together, the rigidity of the imported bearings can be added by preloading. This is very important for precision machinery;
5. The tumbling inlet bearing can accept the radial load and the axial load together, thus simplifying the layout of the imported bearing support;
6. Rolling imported bearings have high transmission efficiency and low heat generation. Therefore, the consumption of smooth oil can be reduced, and smooth protection is more labor-saving;
7. Imported bearings can be conveniently used on uranium in any orientation in space.
However, all things are divided into two, rolling imported bearings also have certain defects, the first is:
1. The imported bearing can accept the load much less than the sliding bearing of the same volume. Therefore, the radial dimension of the tumbling imported bearing is large. Therefore, in the occasion of accepting large load and the requirement that the radial dimension is small and the layout demand is compact. For example, the imported bearings of the internal combustion engine crankshaft, the sliding bearings are often used.
2. The imported bearings have large oscillation and noise. The uniqueness is especially obvious in the later stage of operation. Therefore, when the demand for precision is high and there is no oscillation, it is difficult to roll the imported bearings. Generally, the sliding imported bearings are better. Imported bearings are uniquely sensitive to foreign objects such as metal chips. Once foreign matter enters the imported bearings, it will cause intermittent large oscillations and noise, which will lead to early damage. In addition, the tumbling imported bearings are prone to early damage due to metal clip impurities. The possibility. Even if there is no early damage, the life of the tumbling imported bearing has a certain limit. In general, the life of the tumbling imported bearing is shorter than that of the sliding imported bearing.
However, compared with sliding imported bearings, tumbling imported bearings have their own excellent defects, each of which has certain applicable occasions. Therefore, the two cannot completely replace each other. However, because of the outstanding advantages of tumbling imported bearings, currently, tumbling imported bearings have been carried out. Become the primary support type of machinery, and use it more and more widely.

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