A landing gear emergency switching manual valve

Abstract

A landing gear emergency conversion manual valve relates to the field of power systems, comprising a shell, which has a radial channel and two axial channels, each axial channel being divided into two symmetrical valve core holes; a conversion shaft is rotatably assembled in the radial channel, the conversion shaft body is reduced in diameter to form an annular groove, and a cam is coaxially fixed to the reduced diameter body of the conversion shaft corresponding to the annular groove; a valve sleeve and a plug are inserted in the valve core hole, the inner end face of the plug is provided with a transition hole, and the transition hole is correspondingly connected to the corresponding end side opening of the shell; the middle part of the inner wall of the valve sleeve is reduced inward to form a shrinkage hole, and a valve structure and a top door structure are slidably inserted in the two end parts of the valve sleeve respectively, a first spring is provided between the valve structure and the plug, and the top door structure is used to be moved by the resistance of the cam protrusion when the conversion shaft rotates, and then push the valve structure away from the shrinkage hole, so that the two ends of the valve sleeve can be connected; the landing gear emergency conversion manual valve can realize rapid on-off switching of the two channels while ensuring safety and reliability.

Description

Technical Field

[0001] The present invention relates to the field of power systems, and in particular to an emergency switching manual valve for a landing gear. Background Art

[0002] For the landing gear of amphibious aircraft, its landing and retraction is driven by the hydraulic system. In order to prevent the failure of the retraction and extension hydraulic system, a redundant design is generally adopted, that is, there are two sets of hydraulic system drives. When the main hydraulic system can work normally, an emergency valve needs to be installed at the backup hydraulic system and keep the passage in a cut-off state. Only when the main hydraulic system fails can the emergency valve be used to switch the hydraulic system oil circuit to ensure the normal emergency retraction and extension function of the landing gear.

[0003] Since there are two corresponding switching paths, the traditional method of setting a valve on each path will require two actions for opening and closing, which is very troublesome and does not meet the emergency requirements of fast manual switching. Moreover, due to the high oil pressure of the oil system, the general top-insert valve structure is fast but has the risk of oil leakage, posing a major safety hazard. Summary of the Invention

[0004] In order to overcome the deficiencies in the background technology, the present invention discloses a landing gear emergency switching manual valve, which can achieve rapid on-off switching of two channels while ensuring safety and reliability.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A landing gear emergency conversion hand valve comprises a shell, two axial channels symmetrically provided on both sides of the shell axially extending through the shell, a radial channel radially extending through the middle of the shell, the radial channel dividing each axial channel into two symmetrical valve core holes connected from the corresponding shell end face to the radial channel; a conversion shaft is rotatably assembled in the radial channel, the shaft bodies of the conversion shaft corresponding to the two axial channels are both reduced in diameter to form an annular groove, a cam is coaxially fixed to the reduced diameter shaft body of the conversion shaft corresponding to the annular groove, the cam has two symmetrical protrusions, the shaft bodies of the conversion shaft located at both ends of the annular groove are both rotatably sealed with the inner walls of the corresponding radial channels, one end of the conversion shaft extends out of the radial channel and is connected to a rotating hand Handle; the valve sleeve and the plug are sequentially inserted in the valve core hole from the inside to the outside, and the transition hole is provided in the center of the inner end face of the plug, and the transition hole is correspondingly connected with the corresponding end side opening of the shell; the middle part of the inner wall of the valve sleeve is contracted to form a shrinkage hole, and a valve structure is slidably inserted in the end of the valve sleeve near the plug, and a first spring for applying elastic force to the valve structure and making the valve structure resist the sealing shrinkage hole is provided between the valve structure and the corresponding plug, and a top door structure is slidably inserted in the end of the valve sleeve corresponding to the cam; the two top door structures in the same axial channel are used to be simultaneously resisted and moved by the two protrusions of the cam when the conversion shaft rotates, thereby pushing the corresponding two valve structures away from the shrinkage hole, so that the axial channel can be connected.

[0007] Furthermore, the inner end outer wall of the plug is threadedly connected to the corresponding hole wall of the valve core hole, and a first sealing ring is provided between the outer end outer wall of the plug and the corresponding hole wall of the valve core hole.

[0008] Furthermore, the valve structure includes a sealing cone head and a guide sleeve coaxially fixed to the rear end face of the sealing cone head. The front end cone wall of the sealing cone head can be sealed against the corresponding shrinkage hole. The rear end cone wall of the sealing cone head is provided with a side flow inclined hole connected to the inner cavity of the guide sleeve. The outer wall of the guide sleeve is slidably matched with the corresponding sleeve wall of the valve sleeve, and the corresponding end of the first spring is correspondingly inserted into the guide sleeve.

[0009] Furthermore, the valve structure includes a sealing cone head and a guide sleeve coaxially fixed to the rear end face of the sealing cone head. The front end cone wall of the sealing cone head can be sealed against the corresponding shrinkage hole. The rear end cone wall of the sealing cone head is provided with a side flow inclined hole connected to the inner cavity of the guide sleeve. The outer wall of the guide sleeve is slidably matched with the corresponding sleeve wall of the valve sleeve, and the corresponding end of the first spring is correspondingly inserted into the guide sleeve.

[0010] Furthermore, the top door structure is configured as a stepped shaft with progressive steps, the minimum diameter shaft end of the stepped shaft corresponds to the shrinkage hole and has a diameter smaller than the shrinkage hole, and the maximum diameter shaft body of the stepped shaft is slidably fitted with the corresponding sleeve wall of the valve sleeve; a spherical head is provided in the center of the maximum diameter shaft end face of the stepped shaft, and a side flow hole is provided at the outer edge of the maximum diameter shaft end face.

[0011] Furthermore, the stepped shaft body is sleeved with a second spring, one end of the second spring contacts the corresponding outer edge surface of the shrinkage hole, and the other end of the second spring contacts the stepped surface of the stepped shaft body with the largest diameter.

[0012] Furthermore, a second sealing ring is provided between the outer wall of the outer end of the valve sleeve and the shell, the outer wall of the inner end of the valve sleeve is reduced in diameter to form a step, and the valve core hole is set as a step hole adapted for the insertion of the valve sleeve.

[0013] Furthermore, a third sealing ring is provided between the conversion shaft body at both ends of the annular groove and the inner wall of the corresponding radial channel.

[0014] Furthermore, a limit stop disc having a diameter larger than that of the radial channel is provided at one end of the conversion shaft away from the rotating handle.

[0015] Furthermore, the shell walls at both ends of each axial channel of the shell are provided with interface pipes connected to the corresponding plug transition holes.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

[0017] The landing gear emergency conversion manual valve disclosed in the present invention inserts a conversion shaft in the radial channel of the shell and manually controls the rotation of the conversion shaft, and then can use the cam on the conversion shaft to apply a reciprocating thrust to the valve structure to control the opening and closing of the valve, thereby achieving the purpose of side rotation operation and controlling the valve opening state, which can expand the use environment, and a single rotation operation can drive the connection of the two axial channels, greatly improving the conversion efficiency of the landing gear hydraulic system and meeting the needs of emergency switching; in addition, two series-connected switch mechanisms are correspondingly arranged in the two symmetrical valve core holes of each axial channel, which can ensure greater safety and reliability in the high-pressure hydraulic oil circuit and prevent leakage accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the implementation structure of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A;

[0020] Figure 3 yes Figure 1 Schematic diagram of the top door structure from a top view;

[0021] Figure 4 1 is a schematic diagram of the end surface structure of the cam;

[0022] Figure 5 This is another schematic diagram of the structural state of the present invention;

[0023] Figure 6 yes Figure 4 Schematic diagram of the left view structure;

[0024] Figure 7 yes Figure 4 Schematic diagram of the right view structure.

[0025] In the figure: 1. Shell; 2. Plug; 201. Transition hole; 3. First sealing ring; 4. First spring; 5. Valve sleeve; 501. Shrinkage hole; 6. Second sealing ring; 7. Conversion shaft; 701. Cam; 702. Limiting plate; 8. Valve structure; 801. Side flow inclined hole; 9. Top door structure; 901. Side flow hole; 10. Third sealing ring; 11. Second spring; 12. Rotating handle. DETAILED DESCRIPTION

[0026] The technical solutions of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" and the like indicating directions or positional relationships, these are merely for the purpose of corresponding to the drawings of the present invention and for the convenience of describing the present invention. They do not indicate or imply that the devices or components referred to must have a specific direction.

[0027] Combined with attachment Figure 1-7 The landing gear emergency conversion hand valve comprises a housing 1, two axial channels symmetrically provided on both sides of the housing 1 and extending axially through the housing 1, a radial channel extending radially through the middle of the housing 1, and the radial channel divides each axial channel into two symmetrical valve core holes connected from the corresponding end face of the housing 1 to the radial channel; a conversion shaft 7 is rotatably assembled in the radial channel, and the shaft body of the conversion shaft 7 corresponding to the two axial channels is reduced in diameter to form an annular groove, which can ensure that the inner ends of the two valve core holes in the same axial channel are always in a connected state, and a cam 701 is coaxially fixed to the reduced shaft body of the conversion shaft 7 corresponding to the annular groove, and the cam 701 has two symmetrical protrusions located The conversion shaft 7 at both ends of the annular groove is rotationally sealed with the inner wall of the corresponding radial channel. One end of the conversion shaft 7 extends out of the radial channel and is connected to a rotary handle 12. The rotary handle 12 is used to control the rotation and positioning of the conversion shaft 7, thereby switching whether the convex part or the flat part of the cam 701 corresponds to the valve core hole. As needed, a third sealing ring 10 is provided between the conversion shaft 7 at both ends of the annular groove and the inner wall of the corresponding radial channel to ensure flexible rotation and sealing effect. In addition, a limit stopper 702 with a diameter larger than the radial channel is provided at the end of the conversion shaft 7 away from the rotary handle 12 to prevent the conversion shaft 7 from escaping from the radial channel.

[0028] The valve sleeve 5 and the plug 2 are sequentially inserted into the valve core hole from the inside to the outside, and the plug 2 is used to limit the valve sleeve 5 axially. A second sealing ring 6 is provided between the outer wall of the outer end of the valve sleeve 5 and the shell 1 to ensure the sealing effect. The inner outer wall of the valve sleeve 5 is reduced in diameter to form a step, and the valve core hole is set as a step hole adapted to the insertion of the valve sleeve 5. The valve sleeve 5 is axially positioned by using the step and the plug 2; according to needs, the inner outer wall of the plug 2 is correspondingly threaded with the corresponding hole wall of the valve core hole, which is convenient for disassembly and assembly of the plug 2 and the valve sleeve 5. A first sealing ring 3 is provided between the wall and the corresponding hole wall of the valve core hole to ensure the sealing effect; a transition hole 201 is provided in the center of the inner end surface of the plug 2, and the transition hole 201 is correspondingly connected to the corresponding end side opening of the housing 1, thereby ensuring the communication between the valve port outside the valve and the transition hole 201; as needed, the shell wall of the housing 1 at both ends of each axial channel is provided with an interface pipe connected to the corresponding transition hole 201 of the plug 2, that is, a corresponding R interface pipe and B interface pipe, as well as a corresponding P interface pipe and A interface pipe;

[0029] The middle portion of the inner wall of the valve sleeve 5 is inwardly contracted to form a shrinkage hole 501. A valve structure 8 is slidably inserted into the end of the valve sleeve 5 near the plug 2. A first spring 4 is provided between the valve structure 8 and the plug 2 for applying elastic force to the valve structure so that the valve structure 8 contacts the sealing shrinkage hole 501. A top gate structure 9 is slidably inserted into the end of the valve sleeve 5 corresponding to the cam 701. The two top gate structures 9 in the same axial channel are used to be simultaneously contacted and moved by the two protrusions of the cam 701 when the conversion shaft 7 rotates, thereby pushing the corresponding two valve structures 8 away from the shrinkage hole, so that the axial channel can be connected;

[0030] As needed, the valve structure 8 includes a sealing cone head and a guide sleeve coaxially fixed to the tail end face of the sealing cone head, the front end cone wall of the sealing cone head can correspondingly contact and seal with the shrinkage hole 501, and the rear end cone wall of the sealing cone head is provided with a side flow inclined hole 801 connected to the inner cavity of the guide sleeve, and multiple side flow inclined holes 801 can be provided; the outer wall of the guide sleeve is slidably matched with the corresponding sleeve wall of the valve sleeve 5, and the corresponding end of the first spring 4 is correspondingly inserted into the guide sleeve, and the guide sleeve is used to radially limit the first spring 4; in addition, the transition hole 201 is set as a stepped hole with three levels of successively reduced diameters, the outer edge surface of the first hole of the stepped hole corresponds to the corresponding end surface of the valve sleeve 5, and the first hole diameter is larger than the outer diameter of the guide sleeve, thereby leaving space for the axial movement of the valve structure 8, the second hole of the stepped hole corresponds to the corresponding end of the first spring 4, and the first spring 4 is radially positioned, and the third hole of the stepped hole is correspondingly connected with the corresponding end side opening of the shell 1 through a radially processed hole;

[0031] The cam 701 is pressed against the top of the step shaft 902 and the cam 703 is pressed against the top of the step shaft 904. The cam 703 is pressed against the top of the step shaft 902 and the cam 703 is pressed against the top of the step shaft 904.

[0032] In the implementation of the landing gear emergency conversion hand valve described in the present invention, when the rotary handle 12 is rotated to drive the conversion shaft 7 to rotate, so that the protruding part of the cam 701 abuts the top door structure 9, the top door structure 9 will push the valve structure 8 out of the shrinkage hole 501, thereby connecting the R interface pipe and the B interface pipe, and the corresponding P interface pipe and the A interface pipe; when the rotary handle 12 is rotated to drive the conversion shaft 7 to rotate, so that the flat part of the cam 701 abuts the top door structure 9, the top door structure 9 will disengage from the abutting valve structure 8, and the valve structure 8 will resume the abutment against the sealed shrinkage hole 501 under the elastic force of the first spring 4, so that the R interface pipe and the B interface pipe are disconnected, and the corresponding P interface pipe and the A interface pipe are disconnected; in addition, the valve sleeve 5 can be set as an integral structure with the shell 1, and the top door structure 9 can be disassembled and assembled from the radial channel.

[0033] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A landing gear emergency switch manual valve, characterized by: The invention comprises a shell (1), wherein two axial channels penetrating along the axial direction of the shell (1) are symmetrically provided on both sides of the shell (1), and a radial channel penetrating along the radial direction is provided in the middle of the shell (1), and each axial channel is divided into two symmetrical valve core holes connected from the end face of the corresponding shell (1) to the radial channel; a conversion shaft (7) is rotatably assembled in the radial channel, and the shaft bodies of the conversion shaft (7) corresponding to the two axial channels are both reduced in diameter to form an annular groove, and the reduced shaft bodies of the conversion shaft (7) corresponding to the annular groove are coaxially fixed with a cam (701), and the cam (701) has two symmetrical protrusions, and the shaft bodies of the conversion shaft (7) located at both ends of the annular groove are both rotatably sealed with the inner wall of the corresponding radial channel, and one end of the conversion shaft (7) extends out of the radial channel and is connected to a rotating handle (12); a valve sleeve (5) and a plug (2) are sequentially inserted into the valve core hole from the inside to the outside, A transition hole (201) is provided at the center of the inner end surface of the plug (2), and the transition hole (201) is correspondingly connected to the corresponding end side opening of the shell (1); the middle part of the inner wall of the valve sleeve (5) is contracted to form a shrinkage hole (501), and a valve structure (8) is slidably inserted in the end of the valve sleeve (5) close to the plug (2), and a first spring (4) is provided between the valve structure (8) and the corresponding plug (2) for applying elastic force to the valve structure (8) so that the valve structure (8) contacts the sealing shrinkage hole (501), and a top door structure (9) is slidably inserted in the end of the valve sleeve (5) corresponding to the cam (701); the two top door structures (9) of the same axial channel are used to be simultaneously contacted and moved by the two protrusions of the cam (701) when the conversion shaft (7) rotates, thereby pushing the corresponding two valve structures (8) away from the shrinkage hole (501), so that the axial channel can be connected.

2. The landing gear emergency switch manual valve according to claim 1, characterized in that: The inner end outer wall of the plug (2) is correspondingly threadedly connected to the corresponding hole wall of the valve core hole, and a first sealing ring (3) is provided between the outer end outer wall of the plug (2) and the corresponding hole wall of the valve core hole.

3. The landing gear emergency switch manual valve according to claim 1, characterized in that: The valve structure (8) includes a sealing cone head and a guide sleeve coaxially fixed to the rear end face of the sealing cone head. The front end cone wall of the sealing cone head can contact and seal with the shrinkage hole (501). The rear end cone wall of the sealing cone head is provided with a side flow inclined hole (801) connected to the inner cavity of the guide sleeve. The outer wall of the guide sleeve is slidably matched with the corresponding sleeve wall of the valve sleeve (5), and the corresponding end of the first spring (4) is correspondingly inserted into the guide sleeve.

4. The landing gear emergency switch manual valve according to claim 3, characterized in that: The transition hole (201) is configured as a stepped hole with three levels of successively reduced diameters. The outer edge surface of the first-level hole of the stepped hole contacts the corresponding end surface of the valve sleeve (5), and the first-level hole diameter is larger than the outer diameter of the guide sleeve. The second-level hole of the stepped hole is correspondingly inserted with the corresponding end of the first spring (4). The third-level hole of the stepped hole is correspondingly connected to the corresponding end side opening of the shell (1) through a radially processed hole.

5. The landing gear emergency switch manual valve according to claim 1, characterized in that: The top door structure (9) is configured as a stepped shaft with progressive steps, the minimum diameter shaft end of the stepped shaft corresponds to the shrinkage hole (501) and has a diameter smaller than the shrinkage hole (501), and the maximum diameter shaft body of the stepped shaft is slidably matched with the corresponding sleeve wall of the valve sleeve (5); a spherical head is provided at the center of the maximum diameter shaft end face of the stepped shaft, and a side flow hole (901) is provided at the outer edge of the maximum diameter shaft end face.

6. The landing gear emergency switch manual valve according to claim 5, characterized in that: The stepped shaft body is sleeved with a second spring (11), one end of the second spring (11) contacts the corresponding outer edge surface of the shrinkage hole (501), and the other end of the second spring (11) contacts the stepped surface of the stepped shaft body with the largest diameter.

7. The landing gear emergency switch manual valve according to claim 1, characterized in that: A second sealing ring (6) is provided between the outer wall of the outer end of the valve sleeve (5) and the housing (1); the inner outer wall of the valve sleeve (5) is reduced in diameter to form a step; and the valve core hole is provided as a step hole adapted for inserting the valve sleeve (5).

8. The landing gear emergency switch manual valve according to claim 1, characterized in that: A third sealing ring (10) is provided between the shaft body of the conversion shaft (7) and the inner wall of the corresponding radial channel at both ends of the annular groove.

9. The landing gear emergency switch manual valve according to claim 1, characterized in that: An end of the conversion shaft (7) away from the rotating handle (12) is provided with a limit stop disc (702) having a diameter larger than the radial channel.

10. The landing gear emergency switch manual valve according to claim 1, characterized in that: The shell walls of the shell (1) at both ends of each axial channel are provided with interface pipes connected to the transition holes (201) of the corresponding plugs (2).

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