1 / 4

Magnetic fields

pearlie
Download Presentation

Magnetic fields

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. 26/08/97 Issue A 1 Magnetic fields Pump should not be operated in magnetic fields Rotors cutting a magnetic field produces eddy current heating Heating thus produced causes rotor and bearing heating and premature failure COULD FAIL WITHIN 1 HOUR !

    2. 26/08/97 Issue A 2 Maximum fields Axial 7 mTesla Radial 3 mTesla

    3. 26/08/97 Issue A 3 Sources of magnetic fields Magnets from standard Penning / AIM heads Do not fit head within 100mmof turbo pump Low field AIM can be fitted at any distance Magnets used in the application Example : beam bending as in mass spectrometer heads Superconducting magnets in Sector MS machines

    4. 26/08/97 Issue A 4 Symptom of magnetic field heating Heating is produced internally - in the rotor Casing is still at an acceptable temperature Not dealt with by external cooling Power drawn increases when field is applied a few watts increase is a indication of trouble Worst case causes rapid bearing failure and/or rotor stator crash

More Related