Hydraulic assembly

Abstract

The present invention relates to a hydraulic assembly, including a hydraulic pump and at least a first, second and third consumption devices, each of which is hydraulically connected with a hydraulic pump in parallel through its supply line by at least one control valve, the first consumption device is endowed with a first priority level, the second consumption device is endowed with a second priority level following the first priority level, and the third consumption device is endowed with a third priority level following the second priority level. In order to provide low-cost priorities for the consumption devices, supply lines of the second and third consumption devices are connected through a connection line for controlling supply priority levels assigned to controls, a load pressure-controlled priority valve is arranged between the hydraulic pump and the connection line in the supply line of the third consumption device, and a volume flow reducing element is arranged in the supply line of the second consumption device, furthermore, the connection line is provided with a blocking unit for blocking volume flow from the second supply line to the third supply line.

Description

technical field [0001] The invention relates to a hydraulic unit with a hydraulic pump and at least a first, a second and a third consumer (Verbraucher) supplied by the hydraulic pump in a demand-controlled (bedarfsgesteuert) manner via corresponding load pressure lines (Lastdruckleitung) (hydraulische Anordnung), in which each consumer is hydraulically connected in parallel with a hydraulic pump via at least one control valve (Steuerventil) via its own supply line (Versorgungsleitung), and the first consumer is assigned a first-stage supply priority A supply priority of the second level subordinate to the first level is assigned to the second consumer, and a supply priority of the third level subordinate to the second level is assigned to the third consumer. Background technique [0002] In agricultural (landwirtschafilichen) vehicles, such as in agricultural tractors or tractors, but also in hydraulic systems in harvesting machines and construction and forestry machines,...

AI Technical Summary

Problems solved by technology

However, when the overall system is undersupplied, this can lead to one of the integrated hydraulic consumers being supplied with an insufficient volume flow and thus shutting down

This is particularly disadvantageous if it is a hydraulic consumer which should have an inherently higher supply priority than hydraulic consumers integrated in the same priority class

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