초록 ▼

A hydraulic system includes at least one hydraulic circuit with at least one pump, one or more consumer equipment units, at least one HP discharge line comprising at least one bypass, the bypass being located between the pump and the units, at least one return line including at least one bypass, the

A hydraulic system includes at least one hydraulic circuit with at least one pump, one or more consumer equipment units, at least one HP discharge line comprising at least one bypass, the bypass being located between the pump and the units, at least one return line including at least one bypass, the bypass being located between a tank and the units. The hydraulic system further includes at least one closure element on the at least one HP line between the bypass and the units, and at least one nonreturn valve on the at least one return line between the bypass and the units. The closure element is placed automatically in the closed position when a break of the HP line is detected downstream of the closure element of the HP line.

대표청구항 ▼

1. A hydraulic system comprising at least one hydraulic circuit said hydraulic circuit comprising: at least one hydraulic pump for generating a high pressure flow of a hydraulic fluid of the at least one hydraulic circuit, said pump defining a direction upstream of the hydraulic circuit,one or more

1. A hydraulic system comprising at least one hydraulic circuit said hydraulic circuit comprising: at least one hydraulic pump for generating a high pressure flow of a hydraulic fluid of the at least one hydraulic circuit, said pump defining a direction upstream of the hydraulic circuit,one or more consumer equipment units of a first zone using the hydraulic fluid, said consumer equipment units defining a direction downstream of the hydraulic circuit,at least one HP discharge line in which the hydraulic fluid flows from the pump to the consumer equipment units, said HP discharge line comprising at least one bypass consumer equipment units of a second zone, in which second zone the hydraulic pump is located, said bypass being located between, on the one hand, the pump and, on the other hand, the consumer equipment units,at least one return line in which the hydraulic fluid flows from the consumer equipment units to a hydraulic tank, said return line comprising at least one bypass to consumer equipment units of a second zone, said bypass being located between, on the one hand, the tank and, on the other hand, the consumer equipment units,wherein the hydraulic system comprises:at least two fuses, on the at least one HP discharge line of the at least one hydraulic circuit between, on the one hand, the bypass and, on the other hand, the consumer equipment units, the second fuse being located downstream of the first,at least two nonreturn valves on the at least one return line of the at least one hydraulic circuit between, on the one hand, the bypass and, on the other hand, the consumer equipment units, and opposing the flow of the fluid from the pump to the consumer equipment unit,each fuse comprising an open position in which the hydraulic fluid flows freely in the HP discharge line from upstream to downstream of said fuse in a normal operating mode of the hydraulic circuit and comprising a closed position in which the hydraulic fluid is prevented from flowing from upstream to downstream of said fuse, each fuse being placed automatically in the closed position when a break of the HP discharge line is detected downstream of said fuse of said HP discharge line, and each fuse is normally open and closes, without external action, when a flow rate of fluid passing through the line at said fuse is higher than a predefined threshold flow rate, characteristic of the rating of the fuse concerned. 2. The hydraulic system as claimed in claim 1, in which a distance between two consecutive fuses on an HP discharge line is such that: the rating of the fuse is at least higher than the maximum normal operating flow rate of all the consumer equipment units located downstream of the fuse,the rating of the fuse is lower than the flow rate in case of breakage of the HP discharge line downstream of the fuse and upstream of the next downstream fuse. 3. The hydraulic system as claimed in claim 2, in which the number and arrangement of the fuses are such that a break at any point of an HP line causes the closure of a fuse upstream of the break on said HP line. 4. The hydraulic system as claimed in claim 3, in which the number and arrangement of the fuses are determined for a given temperature of the hydraulic fluid. 5. An aircraft comprising at least two hydraulic circuits, each circuit supplying consumer equipment units which are specific to it and in which at least one circuit comprises lines in the two wings of said aircraft and belongs to a hydraulic system as claimed in claim 1. 6. A hydraulic system comprising at least one hydraulic circuit said hydraulic circuit comprising: at least one hydraulic pump for generating a high pressure flow of a hydraulic fluid of the at least one hydraulic circuit, said pump defining a direction upstream of the hydraulic circuit,one or more consumer equipment units of a first zone using the hydraulic fluid, said consumer equipment units defining a direction downstream of the hydraulic circuit,at least one HP discharge line in which the hydraulic fluid flows from the pump to the consumer equipment units, said HP discharge line comprising at least one bypass to consumer equipment units of a second zone, in which second zone the hydraulic pump is located, said bypass being located between, on the one hand, the pump and, on the other hand, the consumer equipment units,at least one return line in which the hydraulic fluid flows from the consumer equipment units to a hydraulic tank, said return line comprising at least one bypass to consumer equipment units of a second zone, said bypass being located between, on the one hand, the tank and, on the other hand, the consumer equipment units,the hydraulic system comprising: at least one controlled valve, on the at least one HP discharge line of the at least one hydraulic circuit between, on the one hand, the bypass and, on the other hand, the consumer equipment units,at least one nonreturn valve on the at least one return line of the at least one hydraulic circuit between, on the one hand, the bypass and, on the other hand, the consumer equipment units, and opposing the flow of the fluid from the pump to the consumer equipment units,said at least one controlled valve comprising an open position in which the hydraulic fluid flows freely in the HP discharge line from upstream to downstream of said controlled valve in a normal operating mode of the hydraulic circuit and comprising a closed position in which the hydraulic fluid is prevented from flowing from upstream to downstream of the controlled valve, said controlled valve being placed automatically in the closed position when a break of the HP discharge line is detected downstream of the controlled valve of said HP discharge line,wherein the valve is controlled when a signal from at least one pressure sensor detects a pressure lower than a predefined threshold in a HP discharge line at a point close to a consumer equipment unit among the furthest from the controlled valve,and wherein the at least one sensor is positioned on a HP discharge line close to one tip of an aircraft wing. 7. An aircraft comprising at least two hydraulic circuits, each circuit supplying consumer equipment units which are specific to it and in which at least one circuit comprises lines in two wings of said aircraft and belongs to a hydraulic system as claimed in claim 6.