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 Starting at point A, the chambers of the rotor are filled with
water. This water rotates with the rotor, but follows the contour
of the casing. The water, which entirely fills the rotor chamber
at point A, recedes into the casing as the rotor advances, until
The converging casing
at point C, the rotor chamber is empty.
forces the water back into the rotor chamber, until at point D,
the chamber is again full.
This cycle occurs once during each
revolution of the rotor. As water recedes from the rotor chamber
at point B, the water is replaced by air drawn through an inlet
port in the stationary conical casing that connects to the
compressor inlet.
As the rotor turns through 360 and water is
forced by the casing back into the rotor chamber, the air that has
filled the chamber is forced through discharge ports in the
conical casing to the compressor discharge. The water used as the
liquid compressant also serves to seal clearances between the
rotor and the cone and is referred to as seal water.
FIGURE 2-10. Compression Cycle, Rotary Liquid Piston Compressor
2-24
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