Hydraulic system

摘要

For controlling supply priorities, a hydraulic system includes several loads, a pump, and a tank. One load has a first-level supply priority, and optionally a second load has a second-level supply priority subordinate to the first level. A third load has a third-level supply priority subordinate to the second level. Each load can be connected to the pump by a separate supply line. The supply lines for the first and the optional second load are connected to the pump by a common load-pressure-controlled priority valve and the supply line for the third load is connected to the pump by an additional load-pressure-controlled priority valve. A first load-pressure line leading to the pump is connected to a load-pressure line of the third hydraulic load and to a second load-pressure line.

主权项

1. A hydraulic system for controlling the supply priorities of several hydraulic loads, with a hydraulic pump and a hydraulic tank, at least one first hydraulic load with a first-level supply priority, a second hydraulic load with a second-level supply priority subordinate to the first level, a third hydraulic load with a third-level supply priority subordinate to the second level, wherein each load can be connected hydraulically to the hydraulic pump by a separate supply line, characterized by:
supply lines for the first and the second loads are connected to the hydraulic pump by a common load-pressure-controlled priority valve, and the supply line for the third load is connected to the hydraulic pump by an additional load-pressure-controlled priority valve, and a first load-pressure line leading to the hydraulic pump is connected to a load-pressure line of the third hydraulic load and to a second load-pressure line, the priority valves are connected in parallel and each priority valve has an inlet port connected directly to the pump.