Needle roller bearing in which areas need to be considered when using

by:Waxing     2020-05-24
To be able to give full play to the efficiency of bearing in the machine, in addition to choose the type of match system and model, but also for the correct combination structure design. It is the same needle roller bearing, the needle roller bearing combination design content including what? The combination of the needle roller bearing shaft bearing structural design includes the structure; Bearings and related parts; Bearing lubrication and sealing; As well as the improvement of bearing system stiffness and so on, this is all need to achieve, or needle roller bearing will not be able to normal operation. Besides, there are fixed way about needle roller bearing, if is fixed on both ends, each bearing a under the direction of the bearing force, then allow the shaft with a small amount of thermal expansion at work. In the formal installation needle roller bearing, there should be zero. 25mm- 0. 4 mm axial clearance, can through the gasket or screw to adjust. But this way of fixed limits the two-way movement of needle roller bearing, so generally suitable for use in some small shaft working temperature change, application even when considering thermal elongation, and leave the compensation gap between bearing cover and the outer end face. If only a two-way fixed to one end of the needle roller bearing, the other end of the word keep swimming, can ensure that the bearing can swim free expansion. The fixed end of the needle roller bearing is mainly composed of single bearing or bearing set hand carry two-way axial force, in order to avoid loose fall off, winding bearing inner scope and to a fixed axis. In the whole structure, use the needle roller bearing for swimming fulcrum, bearing outer ring need to have a fixed bearing, and base on swimming between the roller and the ring to guarantee the free expansion of bearing, the bearing function.
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