Three-stage screw compressor
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United States of America Patent
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Jan 1, 2013
Grant Date -
Oct 1, 2009
app pub date -
Jun 9, 2006
filing date -
Dec 8, 2005
priority date (Note) -
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Abstract
The invention relates to a multi step helical screw compressor unit which consists of a drive housing (90), wherein a first, second, and third helical screw compressor (60, 70, 80) are secured in a protruding manner parallel to each other and are driven together by a drive toothed wheel in the drive housing. A gas-like fluid is compressed by the first helical screw compressor (60) at a first intermediate pressure of approximately 3.5 bars, by the second helical screw compressor (70) at a second intermediate pressure of approximately 12 bars and by the third helical screw compressor (80) at an end pressure of approximately 40 bars. The driven toothed wheels (65, 75) of the first and the second helical screw compressors are in contact with the drive toothed wheel (95) above the axes thereof, when the driven toothed wheel (85) of the third helical screw compressor (80) is in contact with the drive toothed wheel (95) in the vicinity of the deepest point thereof (T). The position of the axis of the drive toothed wheel (95) can be modified horizontally, and the position of the driven toothed wheel (85) of the third helical compressor (80) can be modified vertically, in order to install a wheel set having various diameter ratios.
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