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SECTION 3 — ROTOR-STATOR GENERATOR PROBES
3.1 INSTALLING ROTOR-STATOR GENERATOR PROBES
Rotor-stator generator probes are easily installed to the Omni GLH
motor by means of a quarter-turn bayonet mount. Simply push the
generator probe into the motor housing as far as possible, turn clock-
wise, and release. Remove the blue protective cap from the tip of the
generator probe and the Omni GLH is ready to operate.
CAUTION:
Replace the blue protective cap on the end of the generator
probe when the generator probe is not being used.
WARNING:
The tip of a saw tooth generator probe is sharp.
3.2 THEORY OF OPERATION
The rotor shaft is coupled directly to the drive motor, via the drive pin.
When attached to the Homogenizer motor, the rotor shaft can spin up to
28,000rpm. This assembly makes up the rotor portion of the rotor-stator
generator probe. The tube and collar assembly is attached to the motor
housing, but does not spin. This is the stator portion of the rotor-stator
generator probe. As the rotor knife spins within the tube and collar
assembly, it creates a pumping action, pulling the sample into the open
end of the generator probe and forcing the sample out through the win-
dows in the tube. The interaction of the rotor knife with these windows
sets up a shearing action, reducing the particle size of the sample. The
speed differential between the rapidly moving portion and the relatively
stationary of the sample sets up a second force called cavitation pulls the
sample apart, further reducing the particle size.
The processing efficiency can be affected by:
•
Amount of material processed vs. size and speed of the generator probe.
•
Container geometry and size (round vessels encourage swirling,
while fluted or cornered vessels disrupt flow patters for more effec-
tive mixing/ processing).
•
Processing speed vs. optimal speed.
•
Size and type of material and flow characteristics (material parti-
cles must be small enough to be carried into the generator head
for optimal processing).
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