EP 0653021 A1 19950517 - PAIR OF CONVEYOR WORMS FOR ROTARY POSITIVE-DISPLACEMENT PUMPS.
Title (en)
PAIR OF CONVEYOR WORMS FOR ROTARY POSITIVE-DISPLACEMENT PUMPS.
Title (de)
FÖRDERSCHRAUBENPAAR FÜR ROTIERENDE VERDRÄNGERPUMPEN.
Title (fr)
PAIRE DE VIS TRANSPORTEUSES POUR POMPES VOLUMETRIQUES ROTATIVES.
Publication
Application
Priority
- DE 9300595 W 19930703
- DE 4224969 A 19920729
Abstract (en)
[origin: WO9403730A1] The invention relates to a pair of conveyor worms for rotary positive-displacement pumps, the conveyor worms of which, which are formed as a rotor and counter-rotor, rotate contactlessly in the drilling and the sides at the same speed (worm-drive pump), form loss gaps between them and have the same throat depth and pitch and symmetrical flank profiles on each side, made up with respect to their land height of a tooth base beneath the flank profile reversal point (q) and a tooth head thereabove. To provide an improvement it is proposed that the height of the loss gap (c) determined by the profile in the axial section on the pitch circle can be kept constant for a given rotor diameter (DK) by shifting the flank profile reversal point (q) as a function of a technically attainable rotor rise (H).
IPC 1-7
IPC 8 full level
F04C 2/16 (2006.01); F04C 18/08 (2006.01)
CPC (source: EP)
F04C 18/084 (2013.01)
Citation (search report)
See references of WO 9403730A1
Designated contracting state (EPC)
AT BE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9403730 A1 19940217; AT E139304 T1 19960615; CA 2141455 A1 19940217; CN 1042259 C 19990224; CN 1088666 A 19940629; DE 4224969 C1 19930930; EP 0653021 A1 19950517; EP 0653021 B1 19960612; ES 2089828 T3 19961001; JP H07509295 A 19951012; NO 306076 B1 19990913; NO 950310 D0 19950127; NO 950310 L 19950324; ZA 935312 B 19940210
DOCDB simple family (application)
DE 9300595 W 19930703; AT 93914601 T 19930703; CA 2141455 A 19930703; CN 93116899 A 19930729; DE 4224969 A 19920729; EP 93914601 A 19930703; ES 93914601 T 19930703; JP 50487693 A 19930703; NO 950310 A 19950127; ZA 935312 A 19930722