| 摘要 |
PCT No. PCT/EP96/01970 Sec. 371 Date Aug. 12, 1997 Sec. 102(e) Date Aug. 12, 1997 PCT Filed May 9, 1996 PCT Pub. No. WO96/36813 PCT Pub. Date Nov. 21, 1996A power or moment regulation device for an adjustable hydraulic pump having a servo setting apparatus providing for a smooth stepless setting of the pump delivery quantity. In the device, the delivery quantity setting is determined in dependence upon the delivery pressure of the hydraulic pump in a delivery pressure line and a control pressure in a control line. The setting apparatus has a spring setting a pump setting member in the direction of maximum delivery quantity and a piston acting upon the pump setting member in the opposite direction of delivery quantity reduction. The piston is acted upon via a hydraulically actuated control valve with the delivery pressure. The actuation of the control valve is effected by the control pressure in the control line. A moment valve is provided, the closure force of which is determined by a metering spring arrangement connected with the pump setting member and biased in dependence upon the delivery quantity setting. The moment valve connects the control line with a discharge in dependence upon the control pressure in the control line and the biasing of the metering spring arrangement. A settable choke device, for setting the control pressure acting upon the control valve and the moment valve, is arranged in the control line branching off from the operating pressure line of the pump.
|
