2012年7月8日星期日

Bearing the outline of the choice


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The rolling bearing type, type and size are diverse. For the mechanical device to play out the expected performance, select the most appropriate bearing is very important.
For the selected bearing, many will need analysis, from every Angle to research, evaluation on choosing the bearing program, and no special specifications, but the general order as follows:
(1) control of the machine equipment and bearing conditions of use, etc
(2) to clear the requirements of the bearing
(3) the selected the type of bearing
(4) selected bearing configuration
(5) selected bearing size
(6) the selected bearing specifications
(7) selected bearing installation method
Bearing conditions of use and environmental conditions
Correctly grasp the use of mechanical device in bearing parts and the using conditions and the environmental condition is suitable the premise of the bearing. ,roll bearings to obtain the following several aspects of the data and material:
(1) mechanical device functions and structure
(2) the use of bearing parts
(3) bearing l oad (size and direction)
(4) rotation speed
(5) vibration and impact
(6) bearing temperature (temperature, temperature rise around)
(7) the surrounding atmosphere (corrosive, clean sex, lubricate)
Bearing the choice of the ways of configuration
Usually, the shaft is based on two bearing in radial and axial for support, bearing roller bearingsat this point, will be on one side of the bearing called fixed side bearings, it bear radial and axial two kind of load, the fixed axis and bearing box of the relative axial displacement between the role. The other side will be called free side, only bear radial load, axial can move relative to solve because the temperature change and produce the axis of the topic and the installation of the expansion of the bearing interval error.
For fixed side bearings, required to choose available in axial moving rolling s urface (such as cylindrical roller bearing) or to assembly face mobile (such as centripetal ball bearing) bearings. In short axis, fixed side and freedom without any other side, using only one-way fixed axis move to bearing (such as heart to thrust ball bearing).china bearing company



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