EP 1350033 A2 20031008 - DEVICE FOR THE FORCE OIL FEED OF A HYDRAULIC CONSUMER OPERATED AT A DEFINED OPERATING PRESSURE
Title (en)
DEVICE FOR THE FORCE OIL FEED OF A HYDRAULIC CONSUMER OPERATED AT A DEFINED OPERATING PRESSURE
Title (de)
EINRICHTUNG ZUR DRUCKÖLVERSORGUNG EINES MIT EINEM DEFINIERTEN BETRIEBSDRUCK BETRIEBENEN HYDRAULISCHEN VERBRAUCHERS
Title (fr)
DISPOSITIF D'ALIMENTATION EN HUILE SOUS PRESSION DESTINE A UN CONSOMMATEUR HYDRAULIQUE FONCTIONNANT AVEC UNE PRESSION DE FONCTIONNEMENT DEFINIE
Publication
Application
Priority
- DE 10101481 A 20010112
- EP 0200275 W 20020114
Abstract (en)
[origin: WO02055886A2] The invention relates to a device for the forced oil feed of a hydraulic clamping cylinder (11) which is operated at a defined operating pressure p>b< and during whose clamping operation a significant oil leakage flow occurs that is returned to the reservoir (32) of a pressure supply system (33). Said pressure supply system is used for the temporary force oil supply of at least one further hydraulic consumer. The pressure supply system comprises a first pump (41) that permanently functions so as to charge a pressure accumulator (52) used as the pressure source for the consumer (11; 61), and a second pump (42) that feeds a cooling circuit in a low power circulation operation mode. A reservoir charging device (41, 42, 59) is used by means of which the reservoir can be charged to a pressure p>s< when the reservoir pressure falls below a threshold value p>su<, said pressure p>s< being significantly higher than the operation pressure p>b<. The first pump (41) is designed for a pump capacity that supplies the oil leakage flow in the normal operation and that maintains the reservoir pressure at a minimum value p>s< at which the operating pressure p>b< is stable. The reservoir charging device comprises a switch valve (5) that switches also the second pump (42) to the reservoir charging operation mode when the reservoir pressure falls below the lower switch threshold value p>su<. Once the reservoir (52) is charged to a significantly higher switch threshold value p>so<, the second pump is switched back to the circulation operation mode.
IPC 1-7
IPC 8 full level
F15B 1/027 (2006.01)
CPC (source: EP)
F15B 1/033 (2013.01); F15B 2015/268 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20584 (2013.01); F15B 2211/212 (2013.01); F15B 2211/50536 (2013.01); F15B 2211/62 (2013.01); F15B 2211/6306 (2013.01); F15B 2211/6651 (2013.01); F15B 2211/6653 (2013.01)
Citation (search report)
See references of WO 02055886A2
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 02055886 A2 20020718; WO 02055886 A3 20030109; AT E354030 T1 20070315; DE 10201183 A1 20020814; DE 50209473 D1 20070329; EP 1350033 A2 20031008; EP 1350033 B1 20070214
DOCDB simple family (application)
EP 0200275 W 20020114; AT 02706702 T 20020114; DE 10201183 A 20020114; DE 50209473 T 20020114; EP 02706702 A 20020114