CN115924066A - Undercarriage locking device and method - Google Patents
Undercarriage locking device and method Download PDFInfo
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- CN115924066A CN115924066A CN202211518361.6A CN202211518361A CN115924066A CN 115924066 A CN115924066 A CN 115924066A CN 202211518361 A CN202211518361 A CN 202211518361A CN 115924066 A CN115924066 A CN 115924066A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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Abstract
The invention provides a landing gear locking device and a method. The undercarriage locking device comprises a shell, wherein a first spring, a second spring and two oil through holes which are respectively communicated with a hydraulic system and an undercarriage locking hydraulic working cavity are arranged in the shell, a piston assembly which can lock the oil through holes through the resetting of the first spring is arranged between the first oil through holes, and the piston assembly is pushed to move under the hydraulic action, so that the opening or closing of an oil way of the hydraulic system and the undercarriage locking hydraulic working cavity is realized; and the second oil through hole piece is provided with a valve component which can lock the oil through hole through resetting of a second spring, and under the hydraulic action, the valve component is pushed to move, so that the hydraulic system and the undercarriage lock the opening or closing of a pressure relief oil way of the hydraulic working cavity. The invention improves the reliability of landing gear locking, simplifies the landing gear system design, saves space, lightens weight and improves safety.
Description
Technical Field
The invention relates to the technical field of safety control of an oil way lock of an undercarriage, in particular to an undercarriage locking device and an undercarriage locking method, which are applied to hydraulic systems which have strict space and weight control and high reliability requirements and have functions of hydraulic locking, emergency mechanical conversion, oil way pulse and pressure protection, such as hydraulic systems of an aircraft cabin door actuator cylinder, a flap transmission mechanism and other products with similar functions.
Background
The landing gear locking device functions to securely hold the landing gear structure in a position that enables the landing gear structure to be loaded. With the continuous improvement of the reliability requirement of modern airplane fleet landing gear systems, besides a mechanical lock, a hydraulic lock is required to be arranged to control the opening and closing of an oil way of the corresponding mechanical lock. The mechanical lock and the hydraulic lock act simultaneously, and the reliability of the landing gear locking can be improved.
The hydraulic lock of the landing gear locking device disclosed in the prior patent publication No. CN212195874U comprises a piston rod, a shell, a spring, a filler neck and the like, wherein when a product is locked, the piston inputs hydraulic pressure to a right piston cavity through the filler neck, so that the piston moves leftwards until the shell is limited, hydraulic oil in a left piston cavity returns to an oil tank from the filler neck, and the hydraulic lock is locked; when the product is unlocked, hydraulic pressure is input into the left piston cavity through the filler neck, hydraulic pressure acts on the piston, the piston moves rightwards until the screw plug is limited, hydraulic oil in the right piston cavity returns to the oil tank from the filler neck, and the hydraulic lock is unlocked.
However, when the landing gear moves in place or the electromagnetic valve is switched, the oil circuit instantly generates hydraulic energy or the pressure is increased due to temperature and other reasons, if the pressure is not released or absorbed in time, the mechanical lock is unlocked, and damage is caused. In this regard, the prior patents do not consider how this is avoided.
Disclosure of Invention
The invention aims to provide an undercarriage locking device and an undercarriage locking method, which are integrated in the same device by coordinating oil line control and pressure safety protection of an undercarriage locking hydraulic working cavity, control the opening and closing of an oil line of the undercarriage locking hydraulic working cavity and the safety of the oil line in a locking state, improve the reliability of undercarriage locking, simplify the undercarriage system design, save space, reduce weight and improve safety.
The technical scheme of the invention is as follows: a landing gear locking device comprises a shell, wherein a first spring, a second spring and two oil through holes respectively communicated with a hydraulic system and a landing gear locking hydraulic working cavity are arranged in the shell, a piston assembly capable of locking the oil through holes through resetting of the first spring is arranged between the first oil through holes, and the piston assembly is pushed to move under the action of hydraulic pressure so as to open or close an oil way of the hydraulic system and the landing gear locking hydraulic working cavity; and a valve assembly capable of locking the oil through hole through second spring reset is arranged on the second oil through hole piece, and the valve assembly is pushed to move under the hydraulic action, so that the hydraulic system and the undercarriage lock the opening or closing of a pressure relief oil way of the hydraulic working cavity.
Preferably, a push rod which is installed opposite to the coaxial hole of the valve assembly is arranged beside the second oil through hole, and external force is applied through a mechanical method to push the push rod to drive the valve assembly to move, so that the hydraulic system is communicated with an oil way of the landing gear locking hydraulic working cavity.
The other technical scheme of the invention is as follows: a landing gear locking device comprises a spring seat, a first spring, a shell, a piston assembly, a second spring and a valve assembly, wherein one end of the shell is radially provided with a first nozzle, and the other end of the shell is radially provided with a second nozzle; a first communication hole, a second communication hole, a third communication hole and a fourth communication hole which are communicated with each other are formed in the shell; one end of the shell is provided with a cavity; the inner end of the first nozzle is communicated with the first communication hole, and the outer end of the first nozzle is connected with a hydraulic system; the inner end of the second nozzle is communicated with the fourth communication hole, and the outer end of the second nozzle is connected with the landing gear locking hydraulic working cavity; the cavity of the shell is communicated with the fourth communication hole through the third communication hole; the second communication hole is communicated with the cavity of the shell and the fourth communication hole;
the spring seat is in threaded connection with one end of the shell, which is provided with a cavity, and the first spring, the piston assembly, the second spring and the valve assembly are sequentially arranged in the spring seat and the shell from the spring seat; the piston assembly, the valve assembly and the cavity of the shell form a hydraulic working cavity communicated with the first communication hole; the piston assembly moves in the cavity to enable the first nozzle, the second nozzle, the first communication hole, the second communication hole and the fourth communication hole to be communicated or disconnected; the valve assembly moves in the cavity to connect or disconnect the first nozzle, the second nozzle, the first communication hole, the third communication hole and the fourth communication hole.
Preferably, a first sealing surface is arranged on the piston assembly, a second sealing surface is arranged on the housing, and the first sealing surface is attached to the second sealing surface, so that the first nozzle, the second nozzle, the first communication hole, the second communication hole and the fourth communication hole are disconnected.
Preferably, a third sealing surface is arranged on the valve assembly, a fourth sealing surface is arranged on the shell, and the third sealing surface is attached to the fourth sealing surface, so that the first nozzle, the second nozzle, the first communicating hole, the third communicating hole and the fourth communicating hole are disconnected.
Preferably, the landing gear locking device further comprises an adjustment washer disposed between the first spring and the piston assembly.
Preferably, the distance that the piston assembly moves in the cavity is a piston opening stroke, and the piston opening stroke is a distance between the piston assembly and the spring seat; the moving distance of the valve component in the cavity is a valve opening stroke, and the valve opening stroke is the distance between the valve component and the shell.
Preferably, the landing gear locking device further comprises a push rod penetrating through the shell, and the push rod and the valve assembly are coaxially arranged.
The invention also provides an undercarriage locking method which is carried out by adopting the undercarriage locking device and comprises the following steps:
when the first nozzle connected with the hydraulic system is non-pressure supply:
the first spring piston assembly moves towards the direction far away from the spring seat, so that the piston assembly is attached and sealed with the shell, and the first nozzle and the second nozzle are disconnected from the oil way of the fourth communication hole through the first communication hole and the second communication hole; meanwhile, the second spring pushes the valve assembly to move towards the direction far away from the spring seat, so that the valve assembly is attached and sealed with the shell, and the first nozzle and the second nozzle are disconnected from an oil way of the fourth communication hole through the first communication hole and the third communication hole; locking the landing gear locking oil circuit;
when a first nozzle connected with a hydraulic system supplies pressure:
hydraulic pressure enters the hydraulic working cavity through the first communicating hole, then the piston assembly is pushed to overcome the first spring and move towards the direction close to the spring seat, so that the piston assembly is attached to the spring seat, the hydraulic pressure is communicated through oil ways among the second communicating hole, the fourth communicating hole and the second nozzle through the first nozzle and the first communicating hole, and enters the undercarriage to lock the hydraulic working cavity, and the opening of a pressure supply oil way of the undercarriage mechanical lock is realized;
when the hydraulic pressure of the locking hydraulic working cavity of the landing gear is in a locking state pulsated or the pressure is too high:
hydraulic pressure enters through the second nozzle, the fourth communication hole and the third communication hole and pushes the valve assembly to overcome the second spring to move towards the direction close to the spring seat, so that the valve assembly is separated from the shell, the hydraulic pressure enters the hydraulic working cavity, the first communication hole, the first nozzle and an oil circuit of a hydraulic system are communicated, and the opening of a locking pressure relief oil circuit of the undercarriage is realized; after the pressure relief is finished, the valve assembly resets and is attached to the shell again under the action of the second spring, and the oil way of the third communicating hole is locked.
Preferably, the landing gear locking method further comprises:
when a first nozzle connected with the hydraulic system is supplied with pressure: hydraulic pressure gets into confined hydraulic pressure working chamber through first intercommunication hole, when hydraulic pressure can't promote piston assembly to overcome first spring and remove, exert thrust on the push rod, make the push rod promote the valve assembly and overcome the second spring and remove to the direction that is close to the spring holder, hydraulic pressure passes through first mouthpiece, first intercommunication hole through the oil circuit intercommunication between second intercommunication hole, fourth intercommunication hole and the second mouthpiece to enter undercarriage locking hydraulic pressure working chamber, realize undercarriage mechanical lock and supply opening of pressing the oil circuit.
Compared with the related technology, the invention has the following beneficial effects: two oil through holes respectively communicated with the hydraulic system and the undercarriage locking hydraulic working cavity are formed in the same shell, a first spring reset locking piston assembly is arranged between the oil through holes, and the piston assembly is pushed to move under the hydraulic action, so that the opening and closing of an oil way of the hydraulic system and the undercarriage locking hydraulic working cavity are realized; a second spring reset locking valve assembly is arranged between the other oil through hole, so that when hydraulic pulsation or pressure is too high in a locking state of the hydraulic working cavity locked by the undercarriage, a pressure relief oil way can be quickly opened in response to avoid the mechanical lock from being unlocked, a safety effect is achieved, meanwhile, a push rod which is installed in a way of being coaxial with the valve assembly is arranged on a bypass of the oil through hole, external force is applied through a mechanical method to push the push rod to drive the valve assembly to move, the redundant design of the oil way between the hydraulic system and the undercarriage locking hydraulic working cavity is achieved, the mechanical lock and the safety device have the common and coordinated effect, the reliability and the safety of undercarriage locking are improved, the undercarriage system design is simplified, the space is saved, and the weight is reduced.
Drawings
FIG. 1 is a schematic view in section of a landing gear locking device according to the present invention with the first nozzle I at a non-pressurized state;
FIG. 2 is a schematic view of an alternative cross-sectional view of the landing gear locking device provided by the present invention with the first nozzle I at a non-pressurized state;
FIG. 3 is a schematic view in section of a normal open state of the first nozzle I of the landing gear locking device provided by the present invention under pressure;
FIG. 4 is a schematic view in cross section of an alternative view of the landing gear locking device provided in the present invention in the normal open state of the first nozzle I when pressurized;
FIG. 5 is a schematic representation of a cross-sectional view of a redundant open state of the first nozzle I of the landing gear locking device provided by the present invention under pressurized conditions;
FIG. 6 is a schematic representation of another cross-sectional view of the landing gear locking device provided in the present invention in a redundant open state of the first nozzle I when pressurized;
FIG. 7 is a schematic representation of one cross-sectional view of the safety relief of the landing gear locking device provided by the present invention;
figure 8 is a schematic representation of another cross-sectional view of the safety relief of the landing gear locking device provided by the present invention.
In the drawings: 1. a spring seat; 2. a first spring; 3. an adjusting washer; 4. a housing; 5. a piston assembly; 6. a second spring; 7. a shutter assembly; 8. a push rod;
A 1 a first stop surface; a. The 2 A second stop surface; b 1 A first sealing surface; b is 2 A second sealing surface; c 1 A third sealing surface; c 2 A fourth sealing surface; D. a hydraulic working chamber; h 1 The first connecting through hole; h 2 The second communication hole; h 3 And a third communicating hole; h 4 The fourth communication hole; h 5 And a fifth communication hole;
S 1 the piston opening stroke; s 2 The valve opening stroke;
i, a first nozzle; II, a second nozzle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
As shown in fig. 1 and 2, the landing gear locking device provided by the present embodiment includes a spring seat 1, a first spring 2, an adjustment washer 3, a housing 4, a piston assembly 5, a second spring 6, a shutter assembly 7, and a push rod 8.
One end of the shell 4 is radially provided with a first nozzle I, and the other end of the shell is radially provided with a second nozzle II; the housing 4 is provided therein with a first communication hole H1, a second communication hole H2, a third communication hole H3, and a fourth communication hole H4 which are mutually communicated. One end of the shell 4 is provided with a cavity (a large cavity penetrating the end face of the shell 4 and a small cavity extending from the large cavity), the other end of the shell is provided with a fifth communication hole H2, and the shell 4 is also internally provided with a third communication hole H3 coaxially communicated with the fifth communication hole H2. The inner end of the first nozzle I is communicated with the first through hole H1, and the outer end of the first nozzle I is connected with a hydraulic system. The inner end of the second nozzle II is communicated with a fourth communication hole H4, and the outer end of the second nozzle II is connected with the landing gear locking hydraulic working cavity; the second communication hole H2 communicates with the cavity of the housing 4 and the fourth communication hole H4. A push rod 8 is arranged in the fifth communication hole H2.
The spring seat 1 is of a hollow structure, is in threaded connection with one end, provided with a cavity, of the shell 4, and the spring seat 1 extends into the large cavity. The first spring 2, the adjusting washer 3, the piston assembly 5, the second spring 6 and the valve assembly 7 are sequentially arranged in the spring seat 1 and the shell 4 from the spring seat 1. The piston assembly 5 is slidably disposed inside the spring seat 1 at the large cavity position of the housing 4. The cavities of the piston assembly 5, the valve assembly 7 and the housing 4 form a hydraulic working chamber D (i.e., a small chamber) communicated with the first communication hole H1. The piston assembly 5 moves in the cavity to connect or disconnect the first nozzle I, the second nozzle II, the first communication hole H1, the second communication hole H2 and the fourth communication hole H4. The piston assembly 5 is provided with a first sealing surface B1, the shell 4 is provided with a second sealing surface B2, and the first sealing surface B1 is attached to the second sealing surface B2, so that the first nozzle I, the second nozzle II, the first communicating hole H1, the second communicating hole H2 and the fourth communicating hole H4 are disconnected.
The valve assembly 7 moves in the cavity to connect or disconnect the first nozzle I, the second nozzle II, the first communication hole H1, the third communication hole H3 and the fourth communication hole H4. The valve assembly 7 is provided with a third sealing surface C1, the shell 4 is provided with a fourth sealing surface C2, and the third sealing surface C1 is attached to the fourth sealing surface C2, so that the first pipe nozzle I, the second pipe nozzle II, the first communicating hole H1, the third communicating hole H3 and the fourth communicating hole H4 are disconnected.
The distance of the piston assembly 5 moving in the cavity is a piston opening stroke S1, and the piston opening stroke S1 is the distance between the piston assembly 5 and the spring seat 1; the moving distance of the valve component 7 in the cavity is a valve opening stroke S2, and the valve opening stroke S2 is the distance between the valve component 7 and the shell 4.
One end of the first spring 2 is pressed in the spring seat 1, and the other end is pressed on the piston assembly 5, so that the first sealing surface B of the piston assembly 5 1 Second sealing surface B with housing 4 2 Contact is compressed tightly and is formed sealedly, under the hydraulic pressure effect, control hydraulic pressure passes through first mouthpiece I, first communication hole H 1 Through the second communicating hole H 2 And the fourth communicating hole H 4 And the second nozzle II is communicated and disconnected, so that the opening and closing of an oil way of the hydraulic working cavity locked by the undercarriage are realized. One end of the second spring 6 is pressed on the piston assembly 5, and the other end is pressed on the shutter assembly 7, so that the shutter assembly 7 passes through the third communication hole H 3 Guide, third sealing surface C 1 Fourth sealing surface C with housing 4 2 The second nozzle II and the landing gear locking hydraulic working cavity are in locking state under the action of pressure, hydraulic pressure is controlled to pass through the second nozzle II and the fourth communication hole H 4 Through the third communicating hole H 3 And the first communication hole H 1 The first nozzle I is communicated and disconnected, so that the opening and closing of an oil way of a hydraulic working cavity of a mechanical lock of the undercarriage are realized, and the reliability and the safety of the locking of the undercarriage are improved.
Fifth connection of the other end of the housing 4Through hole H 5 A push rod 8 is arranged in the valve seat, and external force is applied by a mechanical method to push the push rod 8 to drive the valve component 7 to overcome the second spring 6 and move to the valve opening stroke S 2 The hydraulic pressure passes through the first pipe nozzle I and the first communication hole H 1 Through the third communicating hole H 3 And a fourth communicating hole H 4 And the oil circuit of the hydraulic working cavity of the mechanical lock of the undercarriage is opened redundantly by the communication of the second nozzle II.
The invention also provides a landing gear locking method which is carried out by adopting the landing gear locking device and comprises the following steps:
as shown in fig. 1 and 2, when a first nozzle i connected with a hydraulic system is non-pressure-supplying:
the first spring 2 moves the piston assembly 5 in the direction away from the spring seat 1, so that the piston assembly 5 is attached and sealed with the shell 4, and the first nozzle I and the second nozzle II are disconnected from an oil way of the fourth communication hole H4 through the second communication hole H2 and the first communication hole H1; meanwhile, the second spring 6 pushes the valve assembly 7 to move towards the direction far away from the spring seat 1, so that the valve assembly 7 is attached to and sealed with the shell 4, and the first nozzle I and the second nozzle II are disconnected from an oil path of the fourth communication hole H4 through the third communication hole H3 and the first communication hole H1. And the locking oil way locking device and the mechanical lock of the undercarriage jointly and coordinately act to lock the locking oil way of the undercarriage.
As shown in fig. 3 and 4, when the first nozzle i connected with the hydraulic system is supplied with pressure:
hydraulic pressure gets into hydraulic pressure working chamber D through first intercommunicating pore H1, promotes again piston assembly 5 overcomes first spring 2 and removes to the direction that is close to spring holder 1, makes piston assembly 5 and the laminating of spring holder 1, and hydraulic pressure passes through first mouthpiece I, first intercommunicating pore H1 through the oil circuit intercommunication between second intercommunicating pore H2, fourth intercommunicating pore H4 and second mouthpiece II to enter undercarriage locking hydraulic pressure working chamber, realize undercarriage mechanical lock and supply opening of pressing the oil circuit.
When the nozzle I connected to the hydraulic system is pressurized, as shown in FIGS. 5 and 6, the hydraulic pressure passes through the first communication hole H 1 Enters a closed hydraulic working chamber D, and when the hydraulic pressure can not push the piston assembly 5 to overcome the first spring 2 and move towards the direction close to the spring seat 1When the valve is in motion, external force can be applied through a mechanical method to push the push rod 8 to drive the valve component 7 to overcome the second spring 6 to move towards the direction close to the spring seat 1 until the valve 7 is opened by a stroke S 2 (third seal surface C 1 To the fourth sealing surface C 2 Disengaged, the seal of the portion is released), the hydraulic pressure passes through the first nozzle I, the first communication hole H 1 Through the third communicating hole H 3 And a fourth communication hole H 4 And an oil way between the second nozzle II is communicated, so that hydraulic pressure enters the undercarriage locking hydraulic working cavity, and then the hydraulic pressure enters the mechanical lock hydraulic working cavity, so that the undercarriage mechanical lock pressure supply oil way is opened.
As shown in fig. 7 and 8, when the hydraulic pressure is pulsated or the pressure is too high in the locking state of the landing gear locking hydraulic working chamber, the hydraulic pressure passes through the second nozzle ii and the fourth communication hole H 4 And a third communicating hole H 3 The valve component 7 is pushed to move to the direction close to the spring seat 1 against the second spring 6 to reach the valve opening stroke S 2 (third seal surface C) 1 To the fourth sealing surface C 2 Disengaged, the seal of this portion is released), hydraulic pressure enters the hydraulic working chamber D, and then passes through the first communication hole H 1 First mouthpiece I and hydraulic system's oil circuit intercommunication realizes that quick response opens undercarriage locking pressure release oil circuit, avoids drawing the mechanical lock and unblanks, plays the safety action. After pressure relief, the valve component 7 automatically and quickly resets under the action of the second spring 6, and the third sealing surface C 1 To the fourth sealing surface C 2 Contact-pressing to form a seal and lock the third communication hole H 3 The oil passage of (2).
According to the hydraulic control system, two oil holes which are respectively communicated with a hydraulic system and the undercarriage locking hydraulic working cavity are arranged in the same component, the piston assembly which is reset and locked through the spring is arranged between the oil holes, and the piston assembly is pushed to move under the hydraulic action of the system, so that the opening and closing of an oil way of the undercarriage locking hydraulic working cavity are realized. A valve assembly which is reset and locked through a spring is arranged between the other oil hole, so that when the hydraulic pressure pulsation or the pressure of the undercarriage locking hydraulic working cavity is too high in a locking state, the pressure relief oil way is opened in a quick response mode, the mechanical lock is prevented from being unlocked, and the safety effect is achieved. A push rod is arranged on a bypass of the valve assembly control oil passage hole, so that the redundant design of opening the undercarriage locking hydraulic working cavity pressure supply oil passage in a mechanical mode is realized.
The undercarriage locking device can control the opening and closing of the undercarriage locking hydraulic working cavity oil way and the safety of oil way locking, the mode of mechanically opening the oil way is designed in a redundant mode, the undercarriage locking device and the mechanical lock act together and coordinately, and the reliability and the safety of undercarriage locking are improved. When the hydraulic system supplies pressure, the hydraulic pressure overcomes the pressing force of the built-in piston assembly to push the piston assembly to move, so that the pressure supply oil way of the hydraulic working cavity for locking the undercarriage is opened, and the mechanical lock of the undercarriage is unlocked. When the undercarriage is in a locking position and a locking state, hydraulic energy generated instantaneously by an oil circuit when the electromagnetic valve is switched or the oil pressure of a hydraulic locking cavity locked by the undercarriage is too high due to temperature and other reasons, the built-in valve assembly can be quickly opened and decompressed in response, so that the mechanical lock is prevented from being unlocked, and the safety protection effect is achieved. When the pressure supply of the hydraulic system cannot overcome the pressing force of the piston assembly to open the oil circuit, the valve assembly can be controlled by a push rod arranged on a bypass of the oil circuit, the pressing force of the valve assembly is overcome by a mechanical method, the valve assembly is pushed to move, and therefore the undercarriage is opened to lock the pressure supply oil circuit of the hydraulic working cavity, and the reliability of oil circuit control is improved. When the hydraulic system is not used for supplying pressure, the built-in piston assembly and the valve assembly reset respectively under the action of respective pressing force, and the landing gear locks the oil circuit of the hydraulic working cavity to be closed.
The undercarriage locking device is integrated in the same device through coordination of locking, pressure safety protection and emergency communication functions of a hydraulic oil circuit, corresponding function working cavities are formed respectively, control over the undercarriage locking hydraulic working cavity oil circuit is achieved, the undercarriage system and the undercarriage structure are simplified, the space is saved, the weight is reduced, and the safety is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A landing gear locking device is characterized by comprising a shell (4), wherein a first spring (2), a second spring (6) and two oil through holes which are respectively communicated with a hydraulic system and a landing gear locking hydraulic working cavity are arranged in the shell (4), a piston assembly (5) which can lock the oil through holes through the resetting of the first spring (2) is arranged between the first oil through holes, and the piston assembly (5) is pushed to move under the hydraulic action, so that the opening or closing of an oil way of the hydraulic system and the landing gear locking hydraulic working cavity is realized; and a valve component (7) which can lock the oil through hole by resetting through a second spring (6) is arranged on the second oil through hole piece, and the valve component (7) is pushed to move under the hydraulic action, so that the hydraulic system and the undercarriage lock the opening or closing of a pressure relief oil way of the hydraulic working cavity.
2. The landing gear locking device according to claim 1, wherein a push rod (8) is arranged beside the second oil passage hole and is coaxially arranged with the valve assembly (7), and an external force is mechanically applied to push the push rod (8) to drive the valve assembly (7) to move so as to enable the hydraulic system to be communicated with an oil passage of the landing gear locking hydraulic working cavity.
3. A landing gear locking device is characterized by comprising a spring seat (1), a first spring (2), a shell (4), a piston assembly (5), a second spring (6) and a valve assembly (7), wherein one end of the shell (4) is radially provided with a first nozzle (I), and the other end of the shell is radially provided with a second nozzle (II); a first communication hole (H) which is communicated with each other is arranged in the shell (4) 1 ) And a second communicating hole (H) 2 ) And a third communicating hole (H) 3 ) And a fourth communicating hole (H) 4 ) (ii) a One end of the shell (4) is provided with a cavity; the inner end of the first nozzle (I) and the first communicating hole (H) 1 ) The outer end of the connecting rod is connected with a hydraulic system; the inner end of the second nozzle (II) and a fourth communicating hole (H) 4 ) The outer end of the hydraulic working cavity is connected with the landing gear locking hydraulic working cavity; the cavity of the shell (4) and the fourth communication hole (H) 4 ) Through the third communicating hole (H) 3 ) Communicating; the second connectionThrough hole (H) 2 ) A cavity with the shell (4) and a fourth communication hole (H) 4 ) Communicating;
the spring seat (1) is in threaded connection with one end, provided with a cavity, of the shell (4), and the first spring (2), the piston assembly (5), the second spring (6) and the valve assembly (7) are sequentially arranged in the spring seat (1) and the shell (4) from the spring seat (1); the cavities of the piston assembly (5), the valve assembly (7) and the shell (4) form a first connecting hole (H) 1 ) A hydraulic working chamber (D) in communication; the piston assembly (5) moves in the cavity to enable the first nozzle (I), the second nozzle (II) and the first communication hole (H) to be communicated 1 ) And a second communicating hole (H) 2 ) And a fourth communicating hole (H) 4 ) Connection or disconnection; the valve component (7) moves in the cavity to ensure that the first nozzle (I), the second nozzle (II) and the first communication hole (H) 1 ) And a third communicating hole (H) 3 ) And a fourth communicating hole (H) 4 ) Connected or disconnected.
4. Landing gear locking device according to claim 3, characterized in that the piston assembly (5) is provided with a first sealing surface (B) 1 ) A second sealing surface (B) is arranged on the shell (4) 2 ) Said first sealing surface (B) 1 ) With the second sealing surface (B) 2 ) Attaching the first nozzle (I), the second nozzle (II) and the first through hole (H) 1 ) And a second communicating hole (H) 2 ) And a fourth communicating hole (H) 4 ) And (4) disconnecting.
5. Landing gear locking device according to claim 3, wherein the shutter assembly (7) is provided with a third sealing surface (C) 1 ) A fourth sealing surface (C) is arranged on the shell (4) 2 ) Said third sealing surface (C) 1 ) With said fourth sealing surface (C) 2 ) Attaching the first nozzle (I), the second nozzle (II) and the first through hole (H) 1 ) And a third communicating hole (H) 3 ) And a fourth communicating hole (H) 4 ) And (5) disconnecting.
6. A landing gear locking device according to claim 3, further comprising a trim washer (3) disposed between the first spring (2) and the piston assembly (4).
7. Landing gear locking device according to claim 3, wherein the piston assembly (5) moves within the cavity over a piston opening stroke (S) 1 ) The opening stroke (S) of the piston 1 ) The distance between the piston assembly (5) and the spring seat (1); the distance of the valve component (7) moving in the cavity is the valve opening stroke (S) 2 ) Said valve opening travel (S) 2 ) Is the distance between the valve component (7) and the shell (4).
8. A landing gear locking device according to claim 3, further comprising a push rod (8) passing through the housing (4), the push rod (8) being arranged coaxially with the shutter assembly (7).
9. A landing gear locking method using a landing gear locking device according to any of claims 3 to 8, comprising:
when a first nozzle (I) connected to the hydraulic system is non-pressurized:
the first spring (2) and the piston assembly (5) move towards the direction far away from the spring seat (1), so that the piston assembly (5) is attached to the shell (4) in a sealing manner, and the first nozzle (I) and the second nozzle (II) are enabled to pass through the first through hole (H) 1 ) Through the second communicating hole (H) 2 ) And a fourth communication hole (H) 4 ) The oil passage of (2) is disconnected; meanwhile, the second spring (6) pushes the valve component (7) to move towards the direction far away from the spring seat (1), so that the valve component (7) is attached to the shell (4) in a sealing manner, and the first nozzle (I) and the second nozzle (II) are enabled to pass through the first through hole (H) 1 ) Through the third communicating hole (H) 3 ) And a fourth communication hole (H) 4 ) The oil passage of (2) is disconnected; locking the landing gear locking oil circuit;
when a first nozzle (I) connected with a hydraulic system is used for supplying pressure:
hydraulic pressure passes through the first communication hole (H) 1 ) Enter into hydraulic operationThe cavity (D) pushes the piston assembly (5) to overcome the first spring (2) and move towards the direction close to the spring seat (1), so that the piston assembly (5) is attached to the spring seat (1), and hydraulic pressure passes through the first nozzle (I) and the first communication hole (H) 1 ) Through the second communicating hole (H) 2 ) And a fourth communication hole (H) 4 ) The oil way between the landing gear mechanical lock and the second nozzle (II) is communicated and enters the landing gear locking hydraulic working cavity, so that the opening of the pressure supply oil way of the landing gear mechanical lock is realized;
when the hydraulic pressure of the locking state of the landing gear locking hydraulic working cavity is pulsated or the pressure is too high:
the hydraulic pressure passes through the second nozzle (II) and the fourth communication hole (H) 4 ) And a third communicating hole (H) 3 ) Enters and pushes the valve component (7) to overcome the second spring (6) and move towards the direction close to the spring seat (1), so that the valve component (7) is separated from the shell (4), hydraulic pressure enters the hydraulic working chamber (D), and the first communication hole (H) is formed 1 ) The first nozzle (I) is communicated with an oil way of the hydraulic system, so that the opening of a pressure relief oil way locked by the undercarriage is realized; after the pressure relief is finished, the valve component (7) resets and is attached to the shell (4) again under the action of the second spring (6), and the third communicating hole (H) is locked 3 ) The oil passage of (2).
10. The landing gear locking method according to claim 9, further comprising:
when a first nozzle (I) connected with a hydraulic system is used for supplying pressure: hydraulic pressure passes through the first communication hole (H) 1 ) Get into confined hydraulic pressure working chamber (D), when hydraulic pressure can't promote piston assembly (5) and overcome first spring (2) and remove exert thrust on push rod (8), make push rod (8) promote valve assembly (7) and overcome second spring (6) and remove to the direction that is close to spring seat (1), hydraulic pressure is through first mouthpiece (I), first through-hole (H) 1 ) Through the second communicating hole (H) 2 ) And a fourth communication hole (H) 4 ) And an oil way between the second nozzle (II) is communicated with the oil way and enters the landing gear locking hydraulic working cavity, so that the opening of a pressure supply oil way of a landing gear mechanical lock is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518361.6A CN115924066A (en) | 2022-11-30 | 2022-11-30 | Undercarriage locking device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518361.6A CN115924066A (en) | 2022-11-30 | 2022-11-30 | Undercarriage locking device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115924066A true CN115924066A (en) | 2023-04-07 |
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ID=86555225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211518361.6A Pending CN115924066A (en) | 2022-11-30 | 2022-11-30 | Undercarriage locking device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115924066A (en) |
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2022
- 2022-11-30 CN CN202211518361.6A patent/CN115924066A/en active Pending
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