Method and apparatus for the (moment) activation of a hydraulic drive, in particular a swivel drive for a hydraulic excavator or the like

摘要

The invention relates to a method and an apparatus for the moment activation of a hydraulic drive which is arranged in a hydraulic circuit with drive arrangement controlled as a function of load, has a hydraulic pump and is intended for at least two consumers, of which at least one is a special consumer of an appliance to be actuated hydraulically, in particular a swivel drive for an excavator or the like, which in at least one operating phase has a power requirement with a flow rate reduced in relation to other consumers at a relatively high pressure, with an output control device by means of which the output (oil pressure, oil quantity) required in each case by the individual consumers is to be measured at the hydraulic system and is to be signalled via a control spool or the like as respective desired output as a control variable to the output controller of the hydraulic system in such a way that the latter in each case produces only the (total) required output, to carry out the method according to Claim 1, at least one pressure-reducing device being arranged between the control spool or the like and the output controller, by means of which pressure-reducing device the output signal, when the pressure level set by the output controller is reached, is to be changed to the effect that the pressure fed to the special consumer is increased relative to the output pressure, and the hydraulic fluid quantity fed to the special consumer is reduced to that (desired) quantity which the special consumer ... Original abstract incomplete. <IMAGE>