US2016222977A1PendingUtilityA1

Multiphase pump impeller with means of amplifying and distributing clearance flows

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Assignee: IFP ENERGIES NOWPriority: Sep 11, 2013Filed: Aug 25, 2014Published: Aug 4, 2016
Est. expirySep 11, 2033(~7.1 yrs left)· nominal 20-yr term from priority
Inventors:Philippe Pagnier
F04D 29/548F04D 29/32F04D 29/688F04D 15/0033F04D 29/181F04D 29/526F04D 29/183F04D 29/681F04D 31/00F04D 29/161F04D 29/165F01D 1/20F05D 2210/13F05D 2250/294F04D 29/528F05D 2250/712F04D 7/00F04D 29/242F01D 5/141F04D 29/522F01D 5/20Y02T50/60
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Claims

Abstract

The invention relates to a multiphase compressor or expander impeller (rotor) that can be inserted in a multiphase pump casing. The impeller comprises a blade (Ai) that comprises means ( 6 ) for amplifying and distributing clearance flows between the blade (Ai) and the casing ( 4 ).

Claims

exact text as granted — not AI-modified
1 - 12 . (canceled) 
     
     
         13 . A helical-radial-axial multiphase compressor or expander impeller comprising:
 at least one blade mounted on a hub, the multiphase impeller being disposed in a casing of a multiphase fluid compression or expansion device; and wherein at least one blade comprises means for amplifying and for distributing clearance flows between the at least one blade and the casing.   
     
     
         14 . An impeller as claimed in  claim 13 , wherein the means for amplifying and distributing comprises at least one zone where clearance between the casing and at least one blade is largest at a clearance between the tips of at the least one blade. 
     
     
         15 . An impeller as claimed in  claim 14 , wherein the clearance between at least one blade and the casing varies along longitudinal length of the impeller or a curvilinear direction of the impeller. 
     
     
         16 . An impeller as claimed in  claim 15 , wherein clearance between at least one blade and the casing is largest in a zone where a pressure difference between an overpressure side and an underpressure side of the at least one blade is a maximum. 
     
     
         17 . An impeller as claimed in  claim 14 , wherein the clearance is a maximum over a length of the blade starting in a vicinity of 20% of a longitudinal length of the at least one blade. 
     
     
         18 . An impeller as claimed in  claim 15 , wherein the clearance is a maximum over a length of the blade starting in a vicinity of 20% of a longitudinal length of the at least one blade. 
     
     
         19 . An impeller as claimed in  claim 16 , wherein the clearance is a maximum over a length of the blade starting in a vicinity of 20% of a longitudinal length of the at least one blade. 
     
     
         20 . An impeller as claimed in  claim 14 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         21 . An impeller as claimed in  claim 15 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         22 . An impeller as claimed in  claim 16 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         23 . An impeller as claimed in  claim 17 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         24 . An impeller as claimed in  claim 18 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         25 . An impeller as claimed in  claim 19 , wherein clearance is at a minimum at a leading edge and a trailing edge of the at least one blade. 
     
     
         26 . An impeller as claimed in  claim 14 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         27 . An impeller as claimed in  claim 15 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         28 . An impeller as claimed in  claim 16 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         29 . An impeller as claimed in  claim 17 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         30 . An impeller as claimed in  claim 18 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         31 . An impeller as claimed in  claim 19 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         32 . An impeller as claimed in  claim 20 , wherein clearance is provided by at least one groove formed on the radial tip of at the least one blade. 
     
     
         33 . An impeller as claimed in  claim 14 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         34 . An impeller as claimed in  claim 15 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         35 . An impeller as claimed in  claim 16 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         36 . An impeller as claimed in  claim 17 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         37 . An impeller as claimed in  claim 18 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         38 . An impeller as claimed in  claim 19 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         39 . An impeller as claimed in  claim 20 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         40 . An impeller as claimed in  claim 26 , wherein clearance is provided by a continuous variation of clearance between the at least one blade and the casing. 
     
     
         41 . An impeller as claimed in  claim 14 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         42 . An impeller as claimed in  claim 15 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         43 . An impeller as claimed in  claim 16 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         44 . An impeller as claimed in  claim 17 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         45 . An impeller as claimed in  claim 18 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         46 . An impeller as claimed in  claim 19 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         47 . An impeller as claimed in  claim 20 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         48 . An impeller as claimed in  claim 26 , wherein the means for amplifying and for distributing comprises at least one zone where a thickness of at least one blade is decreased in relation to a thickness at the tips of the blade. 
     
     
         49 . An impeller as claimed in  claim 14 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         50 . An impeller as claimed in  claim 15 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         51 . An impeller as claimed in  claim 16 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         52 . An impeller as claimed in  claim 17 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         53 . An impeller as claimed in  claim 18 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         54 . An impeller as claimed in  claim 19 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         55 . An impeller as claimed in  claim 20 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         56 . An impeller as claimed in  claim 26 , wherein the means for amplifying and for distributing comprises a curvature of the tip of at least one face of a transverse profile of the blade in a direction of lowest pressure. 
     
     
         57 . An impeller as claimed in  claim 49 , wherein tips of two faces of the transverse profile are curved in a direction of lowest pressure. 
     
     
         58 . A device for compressing or expanding a multiphase fluid comprising at least one liquid phase and a gas phase comprising a helical-radial-axial multiphase compressor or expander impeller including at least one blade mounted on a hub, the multiphase impeller being disposed in a casing of a multiphase fluid compression or expansion device; and wherein at least one blade comprises means for amplifying and for distributing clearance flows between the at least one blade and the casing.

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