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COMPRESSION APPARATUS WITH VARIABLE SPEED SCREW AND METHOD

  • US 20110110810A1
  • Filed: 07/16/2010
  • Published: 05/12/2011
  • Est. Priority Date: 07/17/2009
  • Status: Active Grant
First Claim
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1. A two stage compressor feed apparatus operable to compress loose feedstock material, said feed apparatus comprising:

  • a first compressor stage and a second compressor stage;

    said first compressor stage having a screw, said screw having a volute operable to drive the feedstock forward in an axial direction while compressing the feedstock;

    said second compressor stage having an axial accommodation permitting an end of said screw to extend therethrough;

    said first compressor stage having a drive connected to operate said screw;

    said drive being a variable speed drive;

    sensors mounted to monitor operation of said screw and said second compressor stage;

    a controller operable to receive signals from said sensors and to control operation of said screw; and

    said controller being operable continuously to vary operating speed of said drive in response to operation of said second compressor stage.

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