Rotating assemblies

L. Vibrational conveyance. This is referred as the vibratory centrifuge. A relatively bign frequency force is superimposed on the rotating assembly. This can be either in-line with the axis of rotation or torsional, around the drivesbaft. In either case, the cake under inertial force from the vibration is partly fluidized and propelled down the screen under a somewhat steady pace toward the large end, where it is discharged. 

After sueeessful eompletion of all testing, eaeh rotating assembly must be disassembled for visual inspeetion of the rotor, bearings, and seals. Oversped wheels should be examined by the liquid penetrant method. 

The concrete block walls of the cell housing the generator tube and associated components are 1.7 meters thick. The facility also includes a Kaman Nuclear dual-axis rotator assembly for simultaneous transfer and irradiation of reference and unknown sample, and a dual Na iodide (Nal) scintillation detector system designed for simultaneous counting of activated samples. Automatic transfer of samples between load station to the rotator assembly in front of the target, and back to the count station, is accomplished pneumatically by means of two 1.2cm (i.d.) polyethylene tubes which loop down at both ends of the system and pass underneath the concrete shielding thru a pipe duct. Total one-way traverse distance for the samples is approx 9 meters. In performing quantitative analysis for a particular element by neutron activation, the usual approach is to compare the count rates of an unknown sample with that of a reference standard of known compn irradiated under identical conditions... 

For the analyses given in Table 1, samples were contained in special polyethylene vials specifically designed to fit the Kaman Nuclear dual-axis rotator assembly. These vials are 4,5cm long and 1.0cm o.d. with an internal volume of 2.3cu cm. When filled, a vial contains approx 0,5g of NC and 2.3g of TNT or HMX. 

Nitrogen analyses with this special rotator assembly are given in Table 3 for apparently pure samples of Ammonium Nitrate (AN),... 

The most cost-effective way to produce a high polytropic head is to increase the number of wheels on the rotor. But the longer the rotating assembly, the more difficult it is to properly balance the rotor. Especially for high-speed machines, rotors which become unbalanced are subject to destructive vibration. Therefore, for low-molecular-weight gas services (less than 10), it is not uncommon to use reciprocating compressors. 

The cell for rotating electrodes, Fig. 7, is usually cylindrical and surrounded by a water jacket for thermostatting purposes, but as long as the cell walls are more than 1 cm or so from the rotating assembly, there are usually no cell edge effects. The auxiliary electrode is very often contained in a separate compartment behind a glass frit in order to avoid contamination problems. A Luggin capillary, where required, can be positioned in various ways unless it is more than 0.5 cm from the electrode, it must be placed under the centre of the disc in order to avoid a non-equipotential surface this can cause some problems with disturbance of the fluid flow. 

The useful life of the rotating assembly is 5 years. All other components of the still have a 20-year life. 

North and Wells (N7) described the design and operation of a rotary-film contactor for the solvent extraction of metals directly from leached ore slurries. It consists of an enclosed rotating assembly of closely spaced disks centrally mounted on a common horizontal shaft. The transfer of the metal to the solvent layer is effected by the rotating disks where a film of slurry is formed on contact with the leached ore at the bottom of the vessel. This contactor gave excellent uranium recovery from sulfuric... 

C. CLOSEV-LCOP REFRIGERATIOW S/STEM V. PUAL-AXIS SAMPLE ROTATOR ASSEMBLE E. PROTOW RECOIL WEOTROW FLUX MOWITOR... 

The vaporized glycerine stream passes through the entrainment separator [10] and condenses on the internal U-tube condenser [9]. Droplets of material entrained with the vapor stream impinge on the entrainment separator and flow back to the heated wall through centrifugal force of the rotating assembly. Distillate flows out the distillate outlet [11] and noncondensables flow out through the vacuum outlet [13]. 

A suitable automatic cyclic batch centrifuge for this second stage is shown in Figures 6 and 7. It consists of a perforated rotor or basket that runs continuously at full speed on a horizontal axis. The entire rotating assembly is contained in a casing that may be pressurized to meet system requirements with a... 

Critical Speed. The first lateral critical speed of the rotating assembly shall be at least 120% of die maximum operating speed. A dry critical speed calculation (see HI 9.6.4) is adequate to verify compliance. HI 9.6.4 shall be used to calculate static deflections used for the critical speed calculation. 

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