| 摘要 |
<p>The feed unit (4) expanding the hose over the holder, and/or the off-take unit (5) gathering it from the holder, have special construction. A rotationally-symmetrical body (7) and a surrounding module (8) including electromagnets, form a gap (14) for the hose. Each module has spacing sensors to control the magnetic force exerted by the electromagnets. This arrangement forms a magnetic bearing for the central carrier (3). At the other free end of the unit, a conventional roller bearing (9) comprises pairs of support rollers and fixed rollers, between which a further gap for the hose is formed. The body (7) is entirely or partly ferromagnetic. It has ferromagnetic components integrated into its periphery. They are permanent magnets. Electromagnets and spacing sensors are integrated into the modules. Permanent magnets are also included in them. To adjust and control the first gap, there are at least three spacing sensors and at least three electromagnets in equal spacing around the periphery of the modules. An electromagnet, a sensor and a controller, form a control loop. A controller is provided for all control loops of the magnetic bearing, and is fed from a power supply. Alternatively, each control loop of the magnetic bearing is fed from an individual power supply.</p> |
