Spinner turbine

Anderson modification of extended Hiickel treatment, 34 136 -MO, 37 151-153 Anderson structure heteropolyacids, 41 123 Andrews-Beams turbine spinner, 33 209 Aniline... 

Fig. 2. Schematic representation of an Andrew-Beams turbine spinner. Compressed gas enters the space between the stator and the rotor (containing the sample) through jet holes machined at an angle to the conical mushroom surface of the rotor. The whole assembly can be placed at any desired angle to the direction of the magnetic field (not shown).

To insert the sample, first push the sample tube gently into the spinner turbine and adjust the vertical position of the tube using a gauge to assure that the actual sample solution will be centered in the probe inside the RF coils. Place the sample on the air cushion at the top of the magnet bore and deactivate the eject air, and the sample will gently descend into the bore until the spinner rests on the probe with the bottom of the NMR tube inserted into the probe. 

Take out the upper part of the commercial internal NMR magnet assembly, including the spinner turbine. 

Figure I. Side and end section views of the high speed cylindrical NMR sample spinner assembly. Key 1, housing 2, O-ring 3, stator 4, rotor 5, lower end plate 6, bearing point 7, lower rotor end cap 8, bearing button 9, rotor drive end cap JO, air bearing orifice and pocket 11, cooling air hole 12, NMR receiver coil 13, turbine drive jet 14, upper end plate and 15, exhaust holes. (Reproduced, with permission, from Ref. 8J...

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