EP 1069315 A2 20010117 - Turbo machines
Title (en)
Turbo machines
Title (de)
Turbomaschinen
Title (fr)
Turbomachines
Publication
Application
Priority
JP 20130299 A 19990715
Abstract (en)
A turbo machine comprising: an impeller having a plurality of blades therewith; a casing having a flow surface defined therein and being positioned with the impeller therein; and a plurality of grooves being formed in the flow surface of the casing, for connecting between an inlet side of said impeller and an area on the flow surface of the casing in which the blades of said impeller reside, on a periphery thereof, wherein an index of determining a form of the grooves is obtained by a following equation: <DF>JE No. = WR x VR x WDR x DLDR </DF> where, WR (a width ratio) is a value obtained by dividing a total value of the groove widths W with a length of casing periphery; VR (a volume ratio) is a value obtained by dividing a total volume of said grooves with a volume of said impeller; WDR (a width-depth ratio) is a value obtained by dividing the width W of said groove with a depth D of said groove; and DLDR is a ratio between a length of said groove in flow, being lower than the impeller inlet and the depth of said groove, and wherein, said grooves are formed so that the index JE No. lies in a range from 0.03 to 0.5. <IMAGE>
IPC 1-7
IPC 8 full level
F04D 27/02 (2006.01); F04D 29/42 (2006.01); F04D 29/66 (2006.01); F04D 29/68 (2006.01)
CPC (source: EP)
F04D 27/009 (2013.01); F04D 29/4213 (2013.01); F04D 29/4273 (2013.01); F04D 29/669 (2013.01); F04D 29/685 (2013.01); F04D 29/688 (2013.01); F05B 2260/96 (2013.01)
Citation (applicant)
US 4212585 A 19800715 - CARTER ANTHONY F [US], et al
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 1069315 A2 20010117; EP 1069315 A3 20020529; EP 1069315 B1 20070912; AT E373175 T1 20070915; CN 1221741 C 20051005; CN 1281953 A 20010131; DE 60036336 D1 20071025; DE 60036336 T2 20080612
DOCDB simple family (application)
EP 00114868 A 20000711; AT 00114868 T 20000711; CN 00120383 A 20000714; DE 60036336 T 20000711