JP2004050856A - Alighting gear for aircraft - Google Patents

Alighting gear for aircraft Download PDF

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Publication number
JP2004050856A
JP2004050856A JP2002206688A JP2002206688A JP2004050856A JP 2004050856 A JP2004050856 A JP 2004050856A JP 2002206688 A JP2002206688 A JP 2002206688A JP 2002206688 A JP2002206688 A JP 2002206688A JP 2004050856 A JP2004050856 A JP 2004050856A
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Japan
Prior art keywords
line
leg
door
landing gear
bypass valve
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JP2002206688A
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JP3940645B2 (en
Inventor
Manabu Nakahara
中原 学
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KYB Corp
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Kayaba Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance the workability of manually lighting up and down a landing gear during the ground maintenance or during an emergency landing gear lowering mode by automatically operating a bypass valve in an alighting gear for aircraft. <P>SOLUTION: An alighting gear for aircraft comprises a landing gear 21 accommodated in a fuselage, an up-line 45 to lead a pressurized working fluid to a landing gear operating actuator 7 when accommodating the landing gear 21 in the aircraft alighting gear with the landing gear 21 driven by hydraulic pressure via the landing gear operating actuator 7, a down-line 46 to lead the pressurized working fluid to the landing gear operating actuator 7 when the landing gear 21 is developed, and a first bypass valve 6 having an opening to enable the manual operation of the landing gear operating actuator 7. The first bypass valve 6 automatically switches pressure to the opening when internal pressure is dropped after the landing gear operating actuator 7 is stopped with working fluid pressure in the up-line 45 and the down-line 46 as pilot pressure. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、機体に格納可能に設けられる脚を備え、この脚が脚操作アクチュエータを介して油圧によって駆動される航空機用降着装置の改良に関するものである。
【0002】
【従来の技術】
従来、この種の航空機用降着装置はその油圧システムとして、脚操作アクチュエータの手動操作を可能とする開成ポジションを有するバイパスバルブを備え、地上整備時、非常脚下げ時等に手動で脚を揚降する場合に、作業者がバイパスバルブを手動で切換えるようにしたものがあった。
【0003】
【発明が解決しようとする課題】
しかしながら、このような従来の航空機用降着装置にあっては、バイパスバルブを切換える操作に手間がかかるばかりか、地上整備等の際にバイパスバルブが開成ポジションのまま戻し忘れとなってしまう心配があり、これを回避するため非常に複雑な機構が設けられていた。
【0004】
本発明は上記の問題点に鑑みてなされたものであり、航空機用降着装置において、バイパスバルブの作動を自動化して地上整備時、非常脚下げ時等に手動で脚を揚降する作業性を高めることを目的とする。
【0005】
【課題を解決するための手段】
第1の発明は、機体に格納可能に設けられる脚を備え、この脚が脚操作アクチュエータを介して油圧によって駆動される航空機用降着装置に適用する。
【0006】
そして、脚を格納するときに脚操作アクチュエータに加圧作動油を導くアップラインと、脚を展開するときに脚操作アクチュエータに加圧作動油を導くダウンラインと、脚操作アクチュエータの手動操作を可能とする開成ポジションを有する第一バイパスバルブとを備え、この第一バイパスバルブがアップライン及びダウンラインの作動油圧をパイロット圧として脚操作アクチュエータの作動停止後の内圧低下時に開成ポジションへと自動的に切換わる構成としたことを特徴とするものとした。
【0007】
第2の発明は、第1の発明において、脚が格納される格納庫を開閉する扉と、扉を開く時に扉操作アクチュエータに加圧作動油を導くオープンラインと、扉を閉じる時に扉操作アクチュエータに加圧作動油を導くクローズラインと、扉操作アクチュエータの手動操作を可能とする開成ポジションを有する第二バイパスバルブとを備え、この第二バイパスバルブがオープンライン及びクローズラインの作動油圧をパイロット圧として扉操作アクチュエータの作動停止後の内圧低下時に開成ポジションへと自動的に切換わる構成としたことを特徴とするものとした。
【0008】
【発明の作用および効果】
第1の発明によると、第一バイパスバルブの切換え作動がアップライン及びダウンラインの作動油圧をパイロット圧として自動的に行われるため、非常脚下げ時等に手動で脚を揚降する場合、第一バイパスバルブを切換える操作が不要になり、作業性を高められる。また、装置の作動時に第一バイパスバルブが開成ポジションから閉成ポジションに自動的に切換わるため、地上整備等の際に第一バイパスバルブが開成ポジションのまま戻し忘れとなってしまう心配がない。
【0009】
第2の発明によると、第二バイパスバルブの切換え作動がオープンライン及びクローズラインの作動油圧をパイロット圧として自動的に行われるため、地上整備時、非常脚下げ時等に手動で扉を開閉する場合、第二バイパスバルブを切換える操作が不要になり、作業性を高められる。また、装置の作動時に第二バイパスバルブが開成ポジションから閉成ポジションに自動的に切換わるため、地上整備等の際に第二バイパスバルブが開成ポジションのまま戻し忘れとなってしまう心配がない。
【0010】
【発明の実施の形態】
以下、本発明の実施の形態を添付図面に基づいて説明する。
【0011】
図1に示すように、航空機の脚揚降装置は、機体に格納可能に設けられる脚21と、この脚21が格納される格納庫29を開閉する扉31とを備え、脚21及び扉31が油圧システムによって駆動される。
【0012】
脚21は機体に軸22を介して回動可能に支持される。脚揚降装置は、脚21を格納、展開させる脚操作アクチュエータ7と、脚21を展開位置で係止する脚ダウンロック機構23と、この脚ダウンロック機構23の係止作動を解除する脚ダウンロックリリースアクチュエータ4と、脚21を格納位置で係止する脚アップロック機構24と、この脚アップロック機構24の係止作動を解除する脚アップロックリリースアクチュエータ5とを備える。
【0013】
扉31は機体に図示しないヒンジを介して開閉可能に支持される。脚揚降装置は、扉31を開閉させる扉操作アクチュエータ11と、扉31を閉位置で係止する扉アップロック機構34と、この脚アップロック機構34のロック作動を解除する扉アップロックリリースアクチュエータ10とを備える。
【0014】
油圧システムは、油圧源1からの加圧作動油を導くシステムプレッシャーライン15と、作動油をタンクに戻すシステムリターンライン16と、脚21の格納時、展開時に作動油の給排を切換える電磁式セレクターバルブ2と、このセレクターバルブ2を介して導かれる作動油圧によって扉31を開閉駆動する扉回路30と、脚21を駆動する脚回路40とを備える。
【0015】
扉回路30は、扉操作アクチュエータ11及び扉アップロックリリースアクチュエータ10に対する作動油の給排を切換えるシーケンスバルブ8と、このシーケンスバルブ8を介して扉31を開く時に加圧作動油を導くオープンライン35と、扉31を閉じる時に加圧作動油を導くクローズライン36とを備える。
【0016】
シーケンスバルブ8は脚21の動きがメカニカルリンク37を介して伝えられることによりそのポジションが自動的に切換えられる。
【0017】
扉31を手動で開閉するために、扉回路30はクローズライン36にタンク圧を導く第二バイパスバルブ9を備える。第二バイパスバルブ9の油圧アクチュエータにパイロット圧としてオープンライン35の作動油圧を導くパイロットライン25を配設するとともに、同じくパイロット圧としてクローズライン36の作動油圧を導くパイロットライン26を配設する。これにより、第二バイパスバルブ9はオープンライン35、クローズライン36の作動油圧をパイロット圧として切換え作動し、オープンライン35またはクローズライン36に油圧源1から加圧作動油が導かれるのに伴ってクローズライン36を開通させる閉成ポジションに切換わる一方、オープンライン35及びクローズライン36の作動油圧が低下するのに伴ってクローズライン36をシステムリターンライン16に連通させる開成ポジションに切換わる。
【0018】
脚回路40は、脚操作アクチュエータ7と脚ダウンロックリリースアクチュエータ4及び脚アップロックリリースアクチュエータ5に対して、脚21を格納するときに加圧作動油を導くアップライン45と、脚21を展開するときに加圧作動油を導くダウンライン46と、このアップライン45及びダウンライン46を脚操作アクチュエータ7の手前で開閉するシーケンスバルブ3とを備える。
【0019】
シーケンスバルブ3は扉31の開閉作動がメカニカルリンク38を介して伝えられ、そのポジションが自動的に切換えられる。シーケンスバルブ3はアップライン45及びダウンライン46を扉31が開位置にあるときに開き、扉31が閉位置にあるときに閉じる。
【0020】
脚21を手動で揚降するために、脚回路40はアップライン45及びダウンライン46にタンク圧を導く第一バイパスバルブ6を備える。第一バイパスバルブ6の油圧アクチュエータにパイロット圧としてアップライン45の作動油圧を導くパイロットライン17を配設するとともに、同じくパイロット圧としてダウンライン46の作動油圧を導くパイロットライン18を配設する。これにより、第一バイパスバルブ6はアップライン45、ダウンライン46の作動油圧をパイロット圧として切換え作動し、アップライン45またはダウンライン46に油圧源1から加圧作動油が導かれるのに伴ってアップライン45及びダウンライン46の連通を遮断する閉成ポジションに切換えられる一方、アップライン45及びダウンライン46の作動油圧が低下するのに伴ってアップライン45及びダウンライン46を互いに連通し、かつアップライン45及びダウンライン46をシーケンスバルブ3を迂回してシステムリターンライン16に連通させる開成ポジションに切換わる。
【0021】
次に図1〜図6にしたがって、脚21を格納する動作について説明する。
【0022】
図1に示すように、図示しない操作盤からの指令に基づきコントローラがセレクターバルブ2をアップ操作時のポジションに切換え、アップライン45に加圧作動油が導かれ、ダウンライン46にタンク圧が導かれる。このとき、扉回路30では、シーケンスバルブ8が脚ダウン時のポジションに保持されており、オープンライン35に加圧作動油が導かれ、クローズライン36にタンク圧が導かれる。
【0023】
図2に示すように、アップライン45に導かれる加圧作動油によって脚ダウンロックリリースアクチュエータ4のロック作動を解除するとともに、第一バイパスバルブ6を閉じる。同時に、オープンライン35に導かれる加圧作動油によって扉アップロックリリースアクチュエータ10を伸張作動させて扉アップロック機構34のロック作動を解除するとともに、第二バイパスバルブ9がクローズライン36を開通させる閉成ポジションに切換わる。そして、扉操作アクチュエータ11が伸張作動して扉31が開かれ、これに伴いメカニカルリンク38を介してシーケンスバルブ3が開かれる。
【0024】
図3に示すように、シーケンスバルブ3が開かれるのに伴って脚操作アクチュエータ7が伸張作動し、脚21を格納する。この脚21が格納されるのに伴いメカニカルリンク37を介してシーケンスバルブ8が脚ダウン時のポジションからトランジット時の中間ポジションを経て脚アップ時のポジションへと切換えられる。
【0025】
図4に示すように、脚21が所定の格納位置まで上がると、シーケンスバルブ8が脚アップ時のポジションへと切換えられ、オープンライン35にタンク圧が導かれ、クローズライン36に加圧作動油が導かれる。
【0026】
シーケンスバルブ8がトランジット時の中間ポジションからアップポジションに切換わる際、第二バイパスバルブ9に導かれるパイロットライン25からのパイロット圧が一次的に遮断されるが、即座にパイロットライン26からのパイロット圧が導かれ、この動作は瞬間的に行われるので、扉31が開閉する動作が円滑に行われる。
【0027】
図5に示すように、クローズライン36に導かれる加圧作動油によって扉操作アクチュエータ11が収縮作動して扉31が閉じられるとともに、扉アップロックリリースアクチュエータ10が収縮作動して扉アップロック機構34がロック作動する。そして、扉31が閉じられるのに伴いメカニカルリンク38を介してシーケンスバルブ3が閉じられる。
【0028】
図6に示すように、扉アップロック機構34がロック作動するのに伴い図示しないリミットスイッチ等の検出信号に基づきコントローラがセレクターバルブ2を停止ポジションに切換える。これによって脚21を格納する動作が完了する。
【0029】
次に図7〜図11にしたがって、脚21を展開する動作について説明する。
【0030】
図7に示すように、図示しない操作盤からの指令に基づきコントローラがセレクターバルブ2をダウン操作時のポジションに切換え、ダウンライン46に加圧作動油が導かれ、アップライン45にタンク圧が導かれる。このとき、扉回路30では、シーケンスバルブ8が脚アップ時のポジションに保持されており、クローズライン36にタンク圧が導かれ、オープンライン35に加圧作動油が導かれる。
【0031】
図8に示すように、ダウンライン46に導かれる加圧作動油によって脚アップロックリリースアクチュエータ5のロック作動を解除するとともに、第一バイパスバルブ6がアップライン45とダウンライン46の連通を閉じる。同時に、オープンライン35に導かれる加圧作動油によって扉アップロックリリースアクチュエータ10を伸張作動させて扉アップロック機構34のロック作動を解除するとともに、第二バイパスバルブ9がクローズライン36を開通させる閉成ポジションに切換わる。そして、扉操作アクチュエータ11が伸張作動して扉31が開かれ、これに伴いメカニカルリンク38を介してシーケンスバルブ3が開かれる。
【0032】
図9に示すように、シーケンスバルブ3が開かれるのに伴って脚操作アクチュエータ7が収縮作動し、脚21を展開する。この脚21が展開されるのに伴いメカニカルリンク37を介してシーケンスバルブ8が脚アップ時のポジションからトランジット時の中間ポジションを経て脚ダウン時のポジションへと切換えられる。
【0033】
図10に示すように、脚21が所定の展開位置まで降りると、シーケンスバルブ8が脚ダウン時のポジションへと切換えられ、オープンライン35にタンク圧が導かれ、クローズライン36に加圧作動油が導かれる。
【0034】
図11に示すように、クローズライン36に導かれる加圧作動油によって扉操作アクチュエータ11が収縮作動して扉31が閉じられるとともに、扉アップロックリリースアクチュエータ10が収縮作動して扉アップロック機構34がロック作動する。そして、扉31が閉じられるのに伴いメカニカルリンク38を介してシーケンスバルブ3が閉じられる。これによって脚21を展開する動作が完了する。
【0035】
セレクターバルブ2が停止ポジションに切換えられるのに伴って、第二バイパスバルブ9はそのパイロット圧としてオープンライン35及びクローズライン36にタンク圧が導かれることにより、クローズライン36をシステムリターンライン16に連通させる開成ポジションに切換わり、非常脚下げ時等に扉31を手動で開閉することが可能となる。
【0036】
同じくセレクターバルブ2が停止ポジションに切換えられるのに伴って、第一バイパスバルブ6はそのパイロット圧としてアップライン45及びダウンライン46にタンク圧が導かれることにより、アップライン45及びダウンライン46を互いに連通し、かつアップライン45及びダウンライン46をシーケンスバルブ3を迂回してシステムリターンライン16に連通させる開成ポジションに切換わり、脚21を手動で揚降することが可能となる。
【0037】
以上のように第一、第二バイパスバルブ6,9が脚回路40、扉回路30に導かれる圧力に応じて自動的に切換わる構成としたため、地上整備時、非常脚下げ時等に第一、第二バイパスバルブ6,9を切換える操作が不要になり、作業性を高められる。また、装置の作動時に第一、第二バイパスバルブ6,9が自動的に閉成ポジションに切換わるため、地上整備等の際に第一、第二バイパスバルブ6,9が開成ポジションのまま戻し忘れとなってしまう心配がない。
【0038】
本発明は上記の実施の形態に限定されずに、その技術的な思想の範囲内において種々の変更がなしうることは明白である。
【図面の簡単な説明】
【図1】本発明の実施の形態を示す航空機用降着装置の油圧回路図及び作動説明図。
【図2】同じく油圧回路図及び作動説明図。
【図3】同じく油圧回路図及び作動説明図。
【図4】同じく油圧回路図及び作動説明図。
【図5】同じく油圧回路図及び作動説明図。
【図6】同じく油圧回路図及び作動説明図。
【図7】同じく油圧回路図及び作動説明図。
【図8】同じく油圧回路図及び作動説明図。
【図9】同じく油圧回路図及び作動説明図。
【図10】同じく油圧回路図及び作動説明図。
【図11】同じく油圧回路図及び作動説明図。
【符号の説明】
6 第一バイパスバルブ
7 脚操作アクチュエータ
9 第二バイパスバルブ
11 扉操作アクチュエータ
17,18 パイロットライン
21 脚
25,26 パイロットライン
30 扉回路
31 扉
35 オープンライン
36 クローズライン
40 脚回路
45 アップライン
46 ダウンライン
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an aircraft landing gear that includes a leg provided so as to be retractable in an airframe, and the leg is hydraulically driven via a leg operation actuator.
[0002]
[Prior art]
Conventionally, this type of aircraft landing gear has as its hydraulic system a bypass valve with an open position that allows manual operation of the leg operation actuator, and manually raises and lowers the leg during ground maintenance, emergency landing, etc. In some cases, the operator manually switches the bypass valve.
[0003]
[Problems to be solved by the invention]
However, in such a conventional aircraft landing gear, not only is the operation of switching the bypass valve troublesome, but also there is a concern that the bypass valve may be forgotten to return to the open position during ground maintenance or the like. In order to avoid this, a very complicated mechanism has been provided.
[0004]
The present invention has been made in view of the above problems, and in an aircraft landing gear, the workability of automating the operation of a bypass valve and raising and lowering a leg manually at the time of ground maintenance, emergency landing, etc. The purpose is to increase.
[0005]
[Means for Solving the Problems]
A first aspect of the present invention is applied to an aircraft landing gear that is provided with legs that can be stored in an airframe and that is driven by hydraulic pressure via leg operation actuators.
[0006]
Also, the up line that guides pressurized hydraulic oil to the leg operation actuator when retracting the leg, the down line that guides pressurized hydraulic oil to the leg operation actuator when the leg is deployed, and manual operation of the leg operation actuator are possible A first bypass valve having an open position, and the first bypass valve automatically switches to the open position when the internal pressure decreases after the operation of the leg operation actuator is stopped using the operating oil pressure of the up line and the down line as the pilot pressure. It is characterized in that it is configured to be switched.
[0007]
According to a second aspect of the present invention, in the first aspect, a door for opening and closing a hangar in which legs are stored, an open line for guiding pressurized hydraulic oil to a door operation actuator when the door is opened, and a door operation actuator for closing the door A closed line for introducing pressurized hydraulic oil, and a second bypass valve having an open position that allows manual operation of the door operation actuator, the second bypass valve uses the operating oil pressure of the open line and the closed line as pilot pressure When the internal pressure drops after the operation of the door operation actuator is stopped, the internal operation automatically switches to the open position.
[0008]
Function and Effect of the Invention
According to the first invention, since the switching operation of the first bypass valve is automatically performed using the operating oil pressure of the up line and the down line as the pilot pressure, when the leg is manually lifted or lowered when the emergency leg is lowered, etc. The operation of switching one bypass valve is not required, and workability can be improved. Further, since the first bypass valve is automatically switched from the open position to the closed position when the apparatus is operated, there is no fear that the first bypass valve will be left in the open position during maintenance on the ground.
[0009]
According to the second aspect, the switching operation of the second bypass valve is automatically performed using the operating hydraulic pressure of the open line and the closed line as the pilot pressure, so that the door is manually opened and closed during ground maintenance, when the emergency landing gear is lowered, and the like. In this case, the operation of switching the second bypass valve is not required, and workability can be improved. In addition, since the second bypass valve is automatically switched from the open position to the closed position when the device is operated, there is no fear that the second bypass valve will be left in the open position during maintenance on the ground.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0011]
As shown in FIG. 1, the leg lifting device of the aircraft includes a leg 21 provided so as to be able to be stored in the fuselage, and a door 31 that opens and closes a hangar 29 in which the leg 21 is stored. Driven by hydraulic system.
[0012]
The leg 21 is rotatably supported on the body via a shaft 22. The leg lifting device includes a leg operation actuator 7 for storing and deploying the leg 21, a leg down lock mechanism 23 for locking the leg 21 in the deployed position, and a leg down lock for releasing the locking operation of the leg down lock mechanism 23. It includes a lock release actuator 4, a leg up lock mechanism 24 for locking the leg 21 in the retracted position, and a leg up lock release actuator 5 for releasing the locking operation of the leg up lock mechanism 24.
[0013]
The door 31 is supported on the body via a hinge (not shown) so as to be openable and closable. The leg lifting device includes a door operation actuator 11 for opening and closing the door 31, a door up lock mechanism 34 for locking the door 31 in the closed position, and a door up lock release actuator for releasing the locking operation of the leg up lock mechanism 34. 10 is provided.
[0014]
The hydraulic system includes a system pressure line 15 for guiding pressurized hydraulic oil from the hydraulic pressure source 1, a system return line 16 for returning hydraulic oil to the tank, and an electromagnetic type for switching the supply and discharge of hydraulic oil when the legs 21 are stored and deployed. The vehicle includes a selector valve 2, a door circuit 30 that opens and closes a door 31 by operating hydraulic pressure guided through the selector valve 2, and a leg circuit 40 that drives the legs 21.
[0015]
The door circuit 30 includes a sequence valve 8 for switching supply and discharge of hydraulic oil to and from the door operation actuator 11 and the door up lock release actuator 10, and an open line 35 for guiding pressurized hydraulic oil when the door 31 is opened via the sequence valve 8. And a close line 36 for guiding the pressurized hydraulic oil when the door 31 is closed.
[0016]
The position of the sequence valve 8 is automatically switched when the movement of the leg 21 is transmitted through the mechanical link 37.
[0017]
To open and close the door 31 manually, the door circuit 30 includes a second bypass valve 9 for guiding the tank pressure to the closed line 36. A pilot line 25 for guiding the operating oil pressure of the open line 35 as the pilot pressure is provided to the hydraulic actuator of the second bypass valve 9, and a pilot line 26 for guiding the operating oil pressure of the closed line 36 as the pilot pressure is also provided. As a result, the second bypass valve 9 switches and operates the operating oil pressure of the open line 35 and the closed line 36 as pilot pressure, and pressurized hydraulic oil is guided from the hydraulic power source 1 to the open line 35 or the closed line 36. While the operating position is switched to the closed position for opening the closed line 36, the operating position is switched to the opened position for connecting the closed line 36 to the system return line 16 as the operating oil pressure of the open line 35 and the closed line 36 decreases.
[0018]
The leg circuit 40 deploys the leg 21 to the leg operation actuator 7, the leg down lock release actuator 4, and the leg up lock release actuator 5 to guide the pressurized hydraulic oil when the leg 21 is stored. A down line 46 that sometimes guides pressurized hydraulic oil, and a sequence valve 3 that opens and closes the up line 45 and the down line 46 just before the leg operation actuator 7 are provided.
[0019]
The opening and closing operation of the door 31 is transmitted to the sequence valve 3 via the mechanical link 38, and the position is automatically switched. The sequence valve 3 opens the up line 45 and the down line 46 when the door 31 is in the open position, and closes when the door 31 is in the closed position.
[0020]
In order to raise and lower the leg 21 manually, the leg circuit 40 includes a first bypass valve 6 for leading tank pressure to an up line 45 and a down line 46. A pilot line 17 for guiding the operating oil pressure of the up line 45 as the pilot pressure is provided to the hydraulic actuator of the first bypass valve 6, and a pilot line 18 for guiding the operating oil pressure of the down line 46 is also provided as the pilot pressure. As a result, the first bypass valve 6 switches and operates the operating oil pressure of the up line 45 and the down line 46 as pilot pressure, and the pressurized hydraulic oil is guided from the hydraulic power source 1 to the up line 45 or the down line 46. The switch is switched to the closed position where the communication between the upline 45 and the downline 46 is cut off, and the upline 45 and the downline 46 communicate with each other as the operating oil pressure of the upline 45 and the downline 46 decreases, and The open line 45 and the down line 46 are switched to an open position in which the bypass line bypasses the sequence valve 3 and communicates with the system return line 16.
[0021]
Next, the operation of storing the legs 21 will be described with reference to FIGS.
[0022]
As shown in FIG. 1, the controller switches the selector valve 2 to the position at the time of the up operation based on a command from an operation panel (not shown), the pressurized hydraulic oil is led to the up line 45, and the tank pressure is led to the down line 46. I will At this time, in the door circuit 30, the sequence valve 8 is held at the position when the leg is down, the pressurized hydraulic oil is led to the open line 35, and the tank pressure is led to the close line 36.
[0023]
As shown in FIG. 2, the locking operation of the leg down lock release actuator 4 is released by the pressurized hydraulic oil guided to the up line 45, and the first bypass valve 6 is closed. At the same time, the door up lock release actuator 10 is extended by the pressurized hydraulic oil guided to the open line 35 to release the lock operation of the door up lock mechanism 34, and the second bypass valve 9 closes the closed line 36. Switch to the composed position. Then, the door operation actuator 11 is extended and the door 31 is opened, and the sequence valve 3 is opened via the mechanical link 38 accordingly.
[0024]
As shown in FIG. 3, when the sequence valve 3 is opened, the leg operation actuator 7 is extended and the leg 21 is retracted. As the legs 21 are retracted, the sequence valve 8 is switched from the down position to the leg up position via the intermediate position during transit via the mechanical link 37.
[0025]
As shown in FIG. 4, when the leg 21 is raised to a predetermined storage position, the sequence valve 8 is switched to the position when the leg is raised, the tank pressure is led to the open line 35, and the pressurized hydraulic fluid is Is led.
[0026]
When the sequence valve 8 switches from the intermediate position during transit to the up position, the pilot pressure from the pilot line 25 led to the second bypass valve 9 is temporarily interrupted, but immediately the pilot pressure from the pilot line 26 And this operation is performed instantaneously, so that the operation of opening and closing the door 31 is performed smoothly.
[0027]
As shown in FIG. 5, the door operation actuator 11 contracts by the pressurized hydraulic oil guided to the close line 36 to close the door 31, and the door uplock release actuator 10 contracts to operate the door uplock mechanism 34. Locks. Then, as the door 31 is closed, the sequence valve 3 is closed via the mechanical link 38.
[0028]
As shown in FIG. 6, the controller switches the selector valve 2 to the stop position based on a detection signal from a limit switch (not shown) as the door-up lock mechanism 34 locks. Thus, the operation of storing the leg 21 is completed.
[0029]
Next, the operation of deploying the legs 21 will be described with reference to FIGS.
[0030]
As shown in FIG. 7, the controller switches the selector valve 2 to the position at the time of the down operation based on a command from an operation panel (not shown), the pressurized hydraulic oil is introduced to the down line 46, and the tank pressure is introduced to the up line 45. I will At this time, in the door circuit 30, the sequence valve 8 is held at the position when the leg is raised, the tank pressure is led to the closed line 36, and the pressurized hydraulic oil is led to the open line 35.
[0031]
As shown in FIG. 8, the lock operation of the leg up lock release actuator 5 is released by the pressurized hydraulic oil guided to the down line 46, and the first bypass valve 6 closes the communication between the up line 45 and the down line 46. At the same time, the door up lock release actuator 10 is extended by the pressurized hydraulic oil guided to the open line 35 to release the lock operation of the door up lock mechanism 34, and the second bypass valve 9 closes the closed line 36. Switch to the composed position. Then, the door operation actuator 11 is extended and the door 31 is opened, and the sequence valve 3 is opened via the mechanical link 38 accordingly.
[0032]
As shown in FIG. 9, as the sequence valve 3 is opened, the leg operation actuator 7 contracts and the leg 21 is deployed. As the legs 21 are deployed, the sequence valve 8 is switched via the mechanical link 37 from the leg up position to the leg down position via the intermediate position during transit.
[0033]
As shown in FIG. 10, when the leg 21 descends to a predetermined deployed position, the sequence valve 8 is switched to the position when the leg is down, the tank pressure is guided to the open line 35, and the pressurized hydraulic fluid is supplied to the closed line 36. Is led.
[0034]
As shown in FIG. 11, the door operating actuator 11 contracts by the pressurized hydraulic oil guided to the close line 36 to close the door 31, and the door up lock release actuator 10 contracts to operate the door up lock mechanism 34. Locks. Then, as the door 31 is closed, the sequence valve 3 is closed via the mechanical link 38. Thus, the operation of deploying the leg 21 is completed.
[0035]
When the selector valve 2 is switched to the stop position, the tank pressure is guided to the open line 35 and the closed line 36 as the pilot pressure of the second bypass valve 9 so that the closed line 36 communicates with the system return line 16. Then, the door 31 can be manually opened and closed when the emergency leg is lowered.
[0036]
Similarly, as the selector valve 2 is switched to the stop position, the tank pressure is guided to the up line 45 and the down line 46 as the pilot pressure of the first bypass valve 6 so that the up line 45 and the down line 46 are connected to each other. The switch is switched to the open position where the communication is performed and the up line 45 and the down line 46 bypass the sequence valve 3 and communicate with the system return line 16, so that the leg 21 can be lifted and lowered manually.
[0037]
As described above, the first and second bypass valves 6 and 9 are configured to be automatically switched according to the pressure guided to the leg circuit 40 and the door circuit 30, so that the first and second bypass valves 6 and 9 can be used for maintenance on the ground or when the emergency leg is lowered. In addition, the operation of switching the second bypass valves 6 and 9 becomes unnecessary, and the workability can be improved. Also, since the first and second bypass valves 6, 9 are automatically switched to the closed position when the device is operated, the first and second bypass valves 6, 9 are returned to the open position during ground maintenance or the like. Don't worry about forgetting.
[0038]
It is apparent that the present invention is not limited to the above-described embodiment, and that various changes can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a hydraulic circuit diagram and an operation explanatory diagram of an aircraft landing gear showing an embodiment of the present invention.
FIG. 2 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 3 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 4 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 5 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 6 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 7 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 8 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 9 is a hydraulic circuit diagram and operation explanatory diagram.
FIG. 10 is a hydraulic circuit diagram and an operation explanatory diagram.
FIG. 11 is a hydraulic circuit diagram and an operation explanatory diagram.
[Explanation of symbols]
6 First bypass valve 7 Leg operation actuator 9 Second bypass valve 11 Door operation actuator 17, 18 Pilot line 21 Leg 25, 26 Pilot line 30 Door circuit 31 Door 35 Open line 36 Close line 40 Leg circuit 45 Up line 46 Down line

Claims (2)

機体に格納可能に設けられる脚を備え、この脚が脚操作アクチュエータを介して油圧によって駆動される航空機用降着装置において、
脚を格納するときに脚操作アクチュエータに加圧作動油を導くアップラインと、脚を展開するときに脚操作アクチュエータに加圧作動油を導くダウンラインと、脚操作アクチュエータの手動操作を可能とする開成ポジションを有する第一バイパスバルブとを備え、この第一バイパスバルブがアップライン及びダウンラインの作動油圧をパイロット圧として脚操作アクチュエータの作動停止後の内圧低下時に開成ポジションへと自動的に切換わる構成としたことを特徴とする航空機用降着装置。
The aircraft landing gear is provided with legs provided so as to be retractable in the fuselage, and the legs are hydraulically driven via leg operation actuators.
Enables manual operation of the leg operation actuator, as well as an up line that guides pressurized hydraulic oil to the leg operation actuator when the leg is retracted, and a down line that guides pressurized hydraulic oil to the leg operation actuator when the leg is deployed. A first bypass valve having an open position, wherein the first bypass valve automatically switches to the open position when the internal pressure decreases after the operation of the leg operation actuator is stopped using the operating oil pressure of the up line and the down line as the pilot pressure. An aircraft landing gear having a configuration.
前記脚が格納される格納庫を開閉する扉と、この扉を開く時に扉操作アクチュエータに加圧作動油を導くオープンラインと、扉を閉じる時に扉操作アクチュエータに加圧作動油を導くクローズラインと、扉操作アクチュエータの手動操作を可能とする開成ポジションを有する第二バイパスバルブとを備え、この第二バイパスバルブがオープンライン及びクローズラインの作動油圧をパイロット圧として扉操作アクチュエータの作動停止後の内圧低下時に開成ポジションへと自動的に切換わる構成としたことを特徴とする請求項1記載の航空機用降着装置。A door that opens and closes a hangar in which the legs are stored, an open line that guides pressurized hydraulic oil to a door operation actuator when the door is opened, and a close line that guides pressurized hydraulic oil to the door operation actuator when the door is closed, A second bypass valve having an open position allowing manual operation of the door operation actuator, wherein the second bypass valve uses the operating oil pressure of the open line and the closed line as a pilot pressure to reduce the internal pressure after the operation of the door operation actuator is stopped. 2. The landing gear for an aircraft according to claim 1, wherein the landing gear is automatically switched to an opening position at the time.
JP2002206688A 2002-07-16 2002-07-16 Aircraft landing gear Expired - Fee Related JP3940645B2 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006142869A (en) * 2004-11-16 2006-06-08 Kayaba Ind Co Ltd Landing gear ascending/descending system for aircraft
JP2007522009A (en) * 2004-02-09 2007-08-09 ザ・ボーイング・カンパニー Method and system for operating an aircraft landing gear
JP2008110751A (en) * 2006-10-17 2008-05-15 Messier Bugatti Architecture for hydraulic system for operating aircraft landing gear
JP2008132970A (en) * 2006-10-17 2008-06-12 Messier Bugatti Architecture for hydraulic system for operating aircraft landing gear
JP2009047237A (en) * 2007-08-20 2009-03-05 Sumitomo Precision Prod Co Ltd Actuator system
US9415864B2 (en) 2013-06-27 2016-08-16 Mitsubishi Aircraft Corporation Main landing gear bay of aircraft and aircraft
US9499256B2 (en) 2013-08-08 2016-11-22 Mitsubishi Aircraft Corporation Landing gear storage compartment of aircraft, and aircraft
CN106697266A (en) * 2016-12-28 2017-05-24 中国航空工业集团公司西安飞机设计研究所 Retracting control system of aircraft landing gear
US9957033B2 (en) 2012-01-17 2018-05-01 Mitsubishi Aircraft Corporation Door of aircraft and aircraft having the same

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007522009A (en) * 2004-02-09 2007-08-09 ザ・ボーイング・カンパニー Method and system for operating an aircraft landing gear
JP2011136692A (en) * 2004-02-09 2011-07-14 Boeing Co:The Method and system for operating aircraft landing gear
JP2011136693A (en) * 2004-02-09 2011-07-14 Boeing Co:The Method and system for operating aircraft landing gear
JP4859675B2 (en) * 2004-02-09 2012-01-25 ザ・ボーイング・カンパニー Method and system for operating an aircraft landing gear
JP2006142869A (en) * 2004-11-16 2006-06-08 Kayaba Ind Co Ltd Landing gear ascending/descending system for aircraft
JP2008110751A (en) * 2006-10-17 2008-05-15 Messier Bugatti Architecture for hydraulic system for operating aircraft landing gear
JP2008132970A (en) * 2006-10-17 2008-06-12 Messier Bugatti Architecture for hydraulic system for operating aircraft landing gear
JP2009047237A (en) * 2007-08-20 2009-03-05 Sumitomo Precision Prod Co Ltd Actuator system
US9957033B2 (en) 2012-01-17 2018-05-01 Mitsubishi Aircraft Corporation Door of aircraft and aircraft having the same
US9415864B2 (en) 2013-06-27 2016-08-16 Mitsubishi Aircraft Corporation Main landing gear bay of aircraft and aircraft
US9499256B2 (en) 2013-08-08 2016-11-22 Mitsubishi Aircraft Corporation Landing gear storage compartment of aircraft, and aircraft
CN106697266A (en) * 2016-12-28 2017-05-24 中国航空工业集团公司西安飞机设计研究所 Retracting control system of aircraft landing gear

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