Control device for aircraft undercarriages and trap-door housing closure
阅读：77发布：2024-02-02
专利汇可以提供Control device for aircraft undercarriages and trap-door housing closure专利检索，专利查询，专利分析的服务。并且A control device for a retractable aircraft undercarriage and for the trap-door closing its housing, with their actuating and locking members and control members supplying them in mechanohydraulic sequences from a general undercarriage-lifting conduit and a general undercarriage-lowering conduit jack serves for actuating the trap-door, and a first slide-valve distributor and a second slide-valve distributor cooperate in supplying the jack. A first kinematic coupling is controlled by the retracted position of the undercarriage and places the first slide-valve in a characteristic undercarriage-up position and in a noncharacteristic position. A second kinematic coupling is controlled by the down position of the undercarriage and places the second slide-valve in a characteristic position. A mechanohydraulic means connects, in the non-characteristic positions, the opening chamber of the trap-door jack to the high-pressure supply, with hydraulic locking, and the closure chamber to the low-pressure supply.，下面是Control device for aircraft undercarriages and trap-door housing closure专利的具体信息内容。
1. A control device for a retractable undercarriage and for a trap-door closing a housing for the undercarriage, the undercarriage and trap-door having actuating and locking members, and control members for connection and disconnection of the actuating and locking members with an undercarriage-lifting conduit, an undercarriage-lowering conduit and a return conduit, the lifting and lowering conduits being selectively placed under pressure, and the return conduit being at low pressure, said control device comprising a jack connected for actuating said trap-door and havinG opening and closing chambers, a first slidevalve distributor and a second slide-valve distributor cooperating to supply said jack, a first kinematic coupling controlled by the up position of the undercarriage and placing said first slide-valve in a characteristic undercarriage-up position and in a non-characteristic position, a second kinematic coupling controlled by the down position of the undercarriage and placing said second slide-valve in a characteristic undercarriage-down position and in a non-characteristic position, and mechano-hydraulic means for joining together, in said noncharacteristic positions, the opening chamber of the trap-door jack and one of the conduits at high-pressure to effect hydraulic locking, and the closure chamber with the return conduit at low pressure.
2. A device as claimed in claim 1, in which said undercarriage comprises a locking device in the up position, said first kinematic coupling being controlled by said locking device.
3. A device as claimed in claim 1, in which each of said two distributors is provided with four outlets and with a passage, each of said two distributors in its characteristic position connecting the lifting conduit to a first outlet and the lowering conduit to a second outlet, and in its non-characteristic position connecting said first outlet to a third outlet and a fourth outlet to said passage, said first outlet of the first distributor being connected to said second outlet of said second distributor and to the closure chamber of the trap-door jack, said second outlet of the first distributor being connected to the first outlet of the second distributor and to the opening chamber of the trap-door jack, the third outlet of each distributor being connected to the fourth outlet of the other distributor, and said mechano-hydraulic means comprising, on the one hand in said first distributor, two spring clapper-valves supplying its passage, one from the lifting conduit and the other from the lowering conduit, and on the other hand in said second distributor, two spring clapper-valves, one supplying the lifting conduit and the other the lowering conduit from the passage of said distributor.
4. A device as claimed in claim 1, in which each of said two distributors is provided with five outlets, each of said two distributors in its characteristic position connecting the lifting conduit to a first outlet and the lowering conduit to a second outlet, and in its non-characteristic position, connecting 133 first outlet to a third outlet and a fourth outlet to a fifth outlet, said first outlet of said first distributor being connected to said second outlet of said second distributor and to the closure chamber of the trap-door jack, said second outlet of the first distributor being connected to the first outlet of the second distributor and to the opening chamber of the trap-door jack, the third outlet of each distributor being connected to the fourth outlet of other other distributor, and said mechano-hydraulic means comprising, on the one hand a non-return valve supplied by a conduit under pressure and supplying the fifth outlet of said first distributor, and on the other hand a direct connection between the fifth outlet of said second distributor and a return conduit.
5. A device as claimed in claim 1, in which each of said two distributors is provided with three outlets, said first distributor in its characteristic position (undercarriage-up) connecting the lifting conduit to a first outlet and the lowering conduit to a second outlet, and in its non-characteristic position (undercarriage not up) connecting said first outlet to a third outlet, said second distributor in its characteristic position (undercarriage-down) connecting the lifting conduit to a first outlet and the lowering conduit to a second outlet, and in its non-characteristic position (undercarriage not down) connecting a third outlet to a passage, the first outlet of the first distributor being connected to the second outlet and to the closure chAmber of the trap-door jack, the second outlet of the first distributor being connected to the first outlet of the second distributor and to the opening chamber of said trap-door jack, the third outlets of the two distributors being connected together, and said mechano-hydraulic means comprising on the one hand in said second distributor, two spring valves, one supplying the lifting conduit and the other the lowering conduit from the passage of said second distributor, and on the other hand the trap-door jack including a rod provided in the closure chamber with a dog adapted to lock in the open trap-door position on a shoulder by means of an auxiliary piston under the action of a spring in the absence of pressure in said closure chamber.
6. A device as claimed in claim 1, in which said mechano-hydraulic means provide, for the opening chamber of the trap-door jack, a section smaller than the section of its closure chamber.
7. A device as claimed in claim 1, in which each of said two distributors is provided with two outlets, said first distributor in its characteristic position connecting the lifting conduit to a first outlet, and in its non-characteristic position (undercarriage not up) connecting a second outlet to the return conduit, said second distributor in its characteristic position (undercarriage-down) connecting the lowering conduit to a first outlet, and in its non-characteristic position (undercarriage not down) connecting said first outlet to a second outlet, said first outlets being connected together and to the closure chamber of the trap-door jack, said second outlets being connected together, and mechano-hydraulic said means comprising a distributor coupled to the main undercarriage control selector and supplying under pressure during each operation, the opening chamber of the trap-door jack, said trap-door jack having a rod provided, in the closure chamber, with a dog adapted to lock in the open trap-door position, on a shoulder by means of an auxiliary piston under the action of a spring, in the absence of pressure in the closure chamber.
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