The invention of "ball roller bearings" is based on a genius idea, which is a combination of new rolling elements and new assembly methods. All spheres of the traditional rolling "ball" that do not bear the load are removed. This means that 15% of the diameter of the sides of the ball is cut. The result is the so-called ball roller, a flat ball on both sides, which is 30% narrower than the real ball. This significantly saves valuable space.
In addition, such specially shaped "slim" ball rollers and specially developed assembly methods can increase the number of rolling bodies to approximately 90% of the filling space. More rolling elements in the same space allow for higher load ratings for longer product life. This also provides new opportunities to reduce product size and assembly. The dual cage design allows for optimal independent adjustment of the two raceways and is perfectly matched to the application. This ensures maximum load support with minimal bearing size and lower friction.
Rolling bearings fail due to the constant wear of the bearings during the movement. The grease (oil) and the lubrication method are different, which has different effects on reducing the friction and wear of the bearings. Therefore, lubrication technology has become an important part of bearing technology research. Some people refer to grease (oil) as the "fifth part of the bearing" (others are inner ring, outer ring, rolling element, cage).
The resistance to the rotation of the rolling bearing consists of rolling friction, sliding friction and lubricant friction. Rolling friction occurs when the rolling bodies roll on the raceway; the sliding friction occurs on the guide faces of the rolling bodies in the cage, on the rib guide faces of the cage and on the roller end faces and the ferrule ribs in the roller bearings. The friction of the lubricant consists of the internal friction of the lubricant at the contact and the agitation and extrusion of the lubricant. The total friction of a set of bearings, ie the sum of rolling friction, sliding friction and lubricant friction, is the resistance of the impedance bearing movement. The task of studying lubrication technology is to develop different greases (oils) and their lubrication methods to minimize bearing resistance and longest life.
Bearing grease (oil) under common working conditions, foreign advanced industrial countries have completely passed the technology and production, and have formed a series of varieties and batch production capacity. The current main trend is to study the performance of grease under some special circumstances. For example, it is being studied to improve the vacuum stability, creepability and viscosity-temperature performance of perfluoroether grease for aerospace; and, for example, low-temperature grease, although it has good effects in application, its lubrication mechanism does not have a good theory. set forth. For another example, it is studied to use a gaseous lubricant at a high temperature (200 to 4000 degrees).
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