Magneto bearing

ball bearingradialaxial

Magnetic ball bearings are increasingly important in CO2 laser systems and fluid pumps as well as applications in the optics industry. GMN has led the development and manufacture of safety bearings, so-called ‘touchdown bearings’ since the middle of the 1990s. SECURE INVESTMENT Touchdown bearings prevent overloads or failure of magnetic bearings, in which rotating parts could damage the bearing system. Emergency bearings have to carry extreme loads when the shaft crashes and have to adapt to various environmental conditions. The challenge for safety bearings: Extremely high acceleration from stopped to a nominal RPM (n · dm bis 3,5 · 106 mm/min) Large, bumpy radial and axial forces High number of full runs Small installation space Inadequate lubrication Low system costs Use in aggressive environments Optimized Engineering The construction of safety bearings has a significant influence on the dynamic behavior of shafts during emergency runs. 3-bearing systems (a pair of spindle bearings with one grooved bearing) or 4-bearing systems (two pairs of spindle bearings) can be used. Significant performance criteria are: Arrangement of bearings (rigid, radial and and or axially spring-loaded) Bearing friction The masses which are accelerated Friction between shaft and bearing bore Lubrication Cost-effective and space-saving solution, e.g. 3-bearing system High operating safety due to high load absorption. 4-bearing system Optimal protection due to no contact GMN safety bearings are used where other types of bearings reach their limits.