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Multi-stage cyclone separator

  • US 4,289,611 A
  • Filed: 05/05/1980
  • Issued: 09/15/1981
  • Est. Priority Date: 05/10/1979
  • Status: Expired due to Term
First Claim
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1. A vortex separator, operating as a dust filter system for air intake machines, such as gas turbines and other internal combustion engines, comprising dust filters including first and second casings arranged coaxially and having upstream and downstream ends, said upsteam end of said first casing having a predetermined diameter and said upstream end of said second casing having a diameter less than said predetermined diameter, first and second helical bladed inserts respectively mounted within and having corresponding diameters to said upstream ends of said casings, said inserts having blades oriented for effecting air rotation in the same direction, said blades of said second insert having a pitch greater than the blade pitch of said first insert for increasing the swirl of the air entering said second casing, an air outlet connector having upstream and downstream ends and extending coaxially of said downstream end of said second filter, said upstream end of said connector having a diameter less than said upstream end of said second casing, said downstream end of said first casing surrounding and having a larger diameter than said upstream end of said second casing to thereby form a first annular space therewith, said downstream end of said second casing surrounding and having a larger diameter than said upstream end of said air outlet connector to thereby form a second annular space therewith, whereby air containing dust particles of various grain sizes enters said upstream end of said first filter and is subjected to a centrifugal force by said first insert, the dust particles having larger grain sizes first impacting against the inner wall of said first casing and thereby exiting through said first annular space, the dust particles having relatively smaller grain sizes entering said upstream end of said second filter and being subjected to a further centrifugal force by said second insert, the dust particles having grain sizes smaller than said larger sizes first impacting against the inner wall of said second casing and thereby exiting through said second annular space, the dust particles having grain sizes still smaller than said smaller sizes being discharged through said outlet connector.

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