EP 1259737 A1 20021127 - CONTROL DEVICE FOR POSITIVE DISPLACEMENT PUMPS
Title (en)
CONTROL DEVICE FOR POSITIVE DISPLACEMENT PUMPS
Title (de)
REGELEINRICHTUNG FÜR VERDRÄNGERPUMPEN
Title (fr)
DISPOSITIF DE REGULATION POUR POMPES VOLUMETRIQUES
Publication
Application
Priority
- DE 10006140 A 20000211
- EP 0100955 W 20010130
Abstract (en)
[origin: WO0159301A1] The invention relates to a control device for positive displacement pumps, consisting of a throttle device (20) and a flow control valve (18). The flow control valve (18) is provided with a flow control piston (21) and regulates an unrequired excess flow to the pump at an increased speed. The throttle device (20) produces a speed-related pressure differential in a bore section (17A), said pressure differential being responsible for the displacement of the flow control valve (18) and the throttle device (20). The throttle device (20) is placed in the pressure outlet (bore section 17A) of the pump and contains a regulating pin (27) which is connected to the flow control piston (21), having a control contour which is embodied in such a way that a modifiable through cross-section is created in association with a throttle bore (28). The control pin (27) has a wider section (34) in an axial displacement area of the throttle device (20), said area not being involved in control of the volume flow, whereby a minimum obturating section arises in the displacement area. This results in accelerated movement of the flow control piston (21), which in turn results in quicker reaction of the control mechanism, thereby preventing an overshoot and overincrease in the flow capacity.
IPC 1-7
IPC 8 full level
F04C 2/344 (2006.01); F04C 14/26 (2006.01); F04C 15/00 (2006.01); F04C 15/06 (2006.01)
CPC (source: EP US)
F04C 14/26 (2013.01 - EP US); F04C 15/00 (2013.01 - EP US); F04C 15/062 (2013.01 - EP US)
Citation (search report)
See references of WO 0159301A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0159301 A1 20010816; DE 10006140 A1 20010816; DE 50101292 D1 20040212; EP 1259737 A1 20021127; EP 1259737 B1 20040107; ES 2213685 T3 20040901; JP 2003522884 A 20030729; US 2003113216 A1 20030619; US 7059838 B2 20060613
DOCDB simple family (application)
EP 0100955 W 20010130; DE 10006140 A 20000211; DE 50101292 T 20010130; EP 01902363 A 20010130; ES 01902363 T 20010130; JP 2001558612 A 20010130; US 20335702 A 20021015