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We specialize in the research & development of active and passive magnetic bearings and suspension systems. We can adapt our proven proprietary designs or research & develop new magnetic bearings tailored for your application.
Passive magnetic bearings use opposed pairs of permanent magnets on the rotor and stator to establish the bearing%u2019s stiffness. Inherently simple, these bearings do not require any shaft position sensors or an electronic controller for operation.
Active magnetic bearings offer higher load-carrying capability and can accommodate higher temperatures. Their electronic controllers tune bearing stiffness and damping properties "on the fly," allowing for adjustments to system dynamics that affect resonant frequencies and reduce transmitted vibration. Our proprietary virtual balancing method adjusts the shaft%u2019s running position to minimize vibration.
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Radial Bearings
SKF Magnetic Bearings has supplied radial actuators from 50 to 25,000 N (12 to 5,600 lbf), for shaft diameters ranging from 9 mm to 230 mm (3/8 to 9 inches). These are installed on machines that have rotational speeds ranging from 1,800 rpm to 100,000 rpm. Revolve also supplies canned radial bearing designs for hermetically sealed applications and radial bearings for high temperature applications up to 220°C (428°F).
The radial actuators shown opposite are 4,500 N capacity (1,100 lbf) for a 12,000 rpm turbocompressor with a 120 mm (4.7 inch) shaft.
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Your application may lend itself to the use of conical bearings, which can save valuable space by applying both radial and axial forces from the same bearing. SKF has supplied conical bearings capable of handling simultaneous loading up to 8,900 N (2,000 lbf) radial and 17,800 N (4,000 lbf) axial.
The conical bearings shown above provide 350 N (78 lbf) capacity in the radial direction, and 450 N (100 lbf) capacity in the axial direction for a vacuum pump running at 38,500 rpm.
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SKF Magnetic Bearings has supplied thrust bearings from 130 to 24,500 N (30 to 5,500 lbf), for shaft diameters ranging from 9 to 130 mm (3/8 to 5 inches). These are installed on machines that have rotational speeds ranging from 1,800 to 100,000 rpm. SKF also supplies canned thrust bearing designs for hermetically sealed applications and thrust bearings for high temperature applications up to 220°C (428°F).
The thrust bearings shown above are 17,000 N capacity (3,800 lbf) for a 12,000 rpm turbocompressor with a 120 mm shaft.
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SKF Magnetic Bearings offers the world's lowest cost, most capable, magnetic bearing digital control systems with features adaptable to your specific needs. Controllers range in size and power to match the dynamic load requirements of your application.
At the core of each controller is SKF's advanced DSP elelctronics and control software. Product testing across numerous applications and customer environments has shown a high degree of user friendliness and reliability.
We have a complete power range to suit nearly any application. Our smallest starts at a compact 2 amps/40 volts for the most sensitive machines with light dynamic loading. Our smaller controllers also include an integrated motor drive for brushless DC motors.
For heavier industrial machines the system scales up to a powerful 50 amp/200 volt system with intermediate sizes along the way.
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Hyperspin is a spindle range that includes magnetic bearings, motor (synchronous or asynchronous), housings, controller and cabling. Hyperspin is available in speeds up to 60,000 rpm and power rating from 0.3 to 55 kW.
The shaft has a versatile interface for mounting different types of payload. Shaft extensions can be customized to suit each application's payload requirements whether it's a turbopump impeller or a unique neutron absorbing disk.
For inquires of SKF magnetic bearings products please fill in the "Inquiry Form" in the right hand column.
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