Control arrangement for at least two hydraulic consumers

US5752384A · kind A · utility

Assignee

• Mannesmann Rexroth AG · DE

Inventors

• Martin Schmitt · Heidelberg, DE
• Thomas Weickert · Karsbach, DE

Key dates

• Filing date: Nov 20, 1996
• Grant date: May 19, 1998
• Expiry date: Nov 20, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/71
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The present invention proceeds from a control arrangement for at least two hydraulic consumers which has a positive displacement pump the setting of which is variable by a load-sensing regulator which can be acted on via a load-signaling line by the highest load pressure, on which a maximum-pressure and an output regulation are superimposed, two displaceable metering diaphragms a first one of which is connected between the positive displacement pump and a first hydraulic consumer and the second between the positive displacement pump and a second hydraulic consumer, and two pressure compensators a first one of which is arranged behind the first metering diaphragm and the second behind the second metering diaphragm and the regulating pistons of which can be acted on, in opening direction on a front side, by the pressure behind the corresponding metering diaphragm and in closing direction on the rear side by the pressure in the load-signaling line. In order that the pump pressure does not become maximum, since, upon simultaneous actuation of the two hydraulic consumers, the one consumer is moved against a stop or carries out a clamping function, it is provided that, in the event of su…