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In recent years, car manufacturers have been widespread in the production of electric and hybrid cars, and the continuation of this route is changing the face of the automotive industry. Due to the fact that electric motors produce much less sound than internal combustion engines, the noise problem caused by the performance of the bearings, which was previously influenced by the loud sound of the engine, has become a significant issue. In order to solve this problem, NSK has been designing and manufacturing a kind of rounded needle roller blade, which produces a little bit of sound when used.
With the roller rebuild, the shotgun track and shelves, NSK has managed to reduce the noise by 10% from the performance of these bearings compared to the needle rollerburst of the regular boot, and although at first glance, it may seem significant reduction But in practice it is a significant achievement.
According to studies by NSK specialists, the sound of the Bearing performance has three origins. One of these sources of sound is the contact of rollers with the shotgun track and the NSK company, by reducing the geometric deformation of the roller section from the ideal circle, and also designing the pellet path so that the central portion is convex, for Fix this issue. Other sources of sound include a roller contact and a rack contact. NSK has used resin shelves instead of steel shelves to counteract these issues.
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