Controlling device for hydraulic consumers
AssigneeHydac Filtertechnik GmbH
InventorWinfried Rüb
Life of this patent
Estimating the term…
Abstract
A controlling device for hydraulic consumers (10, 12) has one controlling valve (18) for controlling a supply pipeline (TReg) for the hydraulic consumer (10, 12) and a tank return pipeline (TRO). Because the control valve (18) is connected to an additional supply pipeline (TR) and constructed as a priority valve, the supply pipeline (TReg) receives priority preference of a fluid supply system over the priority of the tank return pipeline (TRO). A sensor circuit is realized which checks whether, in accordance with the load situation at the hydraulic consumer (10, 12), there is any need at all for a supply flow.
Claims22
A controlling device for hydraulic consumers, comprising:
- at least one first control valve in a supply line in fluid communication with at least one hydraulic consumer;
- a tank return line in fluid communication with said first control valve;
- an additional feed line connected to said first control valve, said first control valve operating as a priority valve such that said supply line acquires preference of fluid supply relative to said tank return line, and
- a check valve connected between said supply line and said additional feed line and opening in a direction of said supply line.
A controlling device for hydraulic consumers, comprising:
- at least one first control valve in a supply line in fluid communication with at least one hydraulic consumer, said first control valve having a valve piston therein with a control edge;
- a tank return line in fluid communication with said control valve;
- an additional feed line connected to said first control valve, said first control valve operating as a priority valve such that said supply line acquires preference of fluid supply relative to said tank return line;
- and
- a second feed line with a second throttle in said first control valve, said control edge regulating free fluid flow through said second feed line.
A controlling device for hydraulic consumers, comprising:
- at least one first control valve in a supply line in fluid communication with at least one hydraulic consumer, said first control valve being compensator and a 4/3 directional control proportional valve;
- a tank return line in fluid communication with said control valve;
- an additional feed line connected to said first control valve, said first control valve operating as a priority valve such that said supply line acquires preference of fluid supply relative to said tank return line;
- first and second feed valves connected in fluid communication in said supply line and connected to and controlling respective utility parts of a hydraulic consumer individually;
- at least one second control valve having all output side connected to connecting lines of said feed valves and an input side connected to a fluid supply and to said additional feed line, said second control valve being a 4/3 directional control valve.
Dependencies are inferred from the claim text.