Cooling gas in a rotary screw type pump
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United States of America Patent
Stats
-
May 28, 2002
Grant Date -
Oct 18, 2001
app pub date -
Dec 29, 2000
filing date -
Jan 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the compression side of the casing to the shaft portion of the rotors. The cavities are charged with a fluid and may include a porous wick in order to act similar to a heat pipe for removing the heat generated during pump compression. The heat is transferred to the shaft portion of the rotors. The shaft portion of the rotors extend into a cavity that contains a coolant. A water jacket surrounds the cavity. The heat is transferred from the shaft portion of the rotors to the coolant and then the water jacket for removal. The heat transfer from the shaft portions to the coolant may be facilitated with the use of fins.
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