Pipe guiding device with oil passage switching function

Abstract

The present application relates to a kind of pipe routing device with oil circuit conversion function, product uses similar hinged mechanism to provide pipe routing, there are two oil circuits in the inside connection upstream pressure supply system, different system pressure is provided by the oil circuit switching controlled by conversion valve block;Product has multiple rotary pairs, the rotary axis and rotary sleeve of rotary pair can relatively rotate, when landing gear works, rotary pair changes relative position with the rotation of wheel edge brake device, movement compensation angle is large, adapt to the large angle rotation of wheel edge brake device and keep fluid communication, without causing pipe leakage and rupture;Each rotary pair has limiting and sealing function, there is reliable connection between each rotary pair, and service life is long.

Description

Technical Field

[0001] This invention belongs to the field of aircraft hydraulic system accessories and relates to a pipeline guiding device with oil circuit conversion function. Background Technology

[0002] The existing aircraft landing gear uses two flexible hoses connected to a switching valve to control the switching between normal and emergency braking. Due to the high-intensity operation of aircraft landing gear, the hoses have a relatively short lifespan, requiring frequent maintenance and replacement. Furthermore, the large-angle rotation of the tire brake valve relative to the landing gear during retraction and extension makes hose arrangement design difficult, and hose ruptures and leaks are frequent occurrences. Therefore, it is essential to develop a pipeline guiding device that integrates hose compensation and hydraulic circuit switching functions for use on aircraft landing gear. Summary of the Invention

[0003] The purpose of this invention is to provide a structure that integrates large-angle fluid direction control and function switching, applicable to situations requiring pipeline connection, guidance, and switching.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A pipeline guiding device with oil circuit switching function. The product adopts a hinge-like mechanism and has two internal oil circuits connected to the upstream pressure supply system. The oil circuit switching is controlled by a switching valve block to provide different system pressures. The product has multiple rotating joints, each of which has limit and sealing functions, and there is a reliable connection between the rotating joints.

[0006] The pipeline guiding device with oil circuit switching function of the present invention includes: a first rotating pair, a second rotating pair, a third rotating pair, a fourth rotating pair, a fifth rotating pair, and a sixth rotating pair. The six rotating pairs have the same or similar main structure, that is, each rotating pair has a rotating shaft and a rotating sleeve around one end of the rotating shaft, and the rotating shaft and the rotating sleeve can rotate relative to each other on their axial centers. Openings are arranged on the rotating shaft and the rotating sleeve respectively, and fluid communication is formed inside the rotating shaft. A control valve is sealed at both ends to the symmetrically arranged first and second rotating pairs, and is fluidly connected to the openings of the first and second rotating pairs respectively. The other openings of the first and second rotating pairs are connected to the openings of the third and fourth rotating pairs respectively through bends and are fluidly connected. The other openings of the third and fourth rotating pairs are connected to the openings of the fifth and sixth rotating pairs respectively through bends and are fluidly connected.

[0007] The opening of the rotating sleeve corresponds to the position of the rotating shaft, which is a through hole in the circumferential range, so that when the rotating sleeve rotates relative to the rotating shaft, the opening of the rotating sleeve always maintains fluid communication with the rotating shaft.

[0008] When the device of this invention is applied to a landing gear hydraulic system, the wheel-side brake device and the landing gear carriage are concentric circles that are not on the same plane axially. A control valve is connected to the wheel-side brake device via a flange and can rotate with the wheel-side brake device. The control valve also includes an outlet that is fluidly connected to the wheel-side brake device to provide hydraulic pressure. The fifth and sixth rotating joints are respectively connected to the landing gear carriage via flanges, and another opening of the fifth and sixth rotating joints is fluidly connected to the first and second hydraulic lines, respectively.

[0009] When the wheel-side brake device rotates, the first rotating joint, the second rotating joint, and the control valve rotate with the wheel-side brake device. The rotating shafts and rotating sleeves of different rotating joints rotate relative to each other, and the positions of the rotating joints move relative to each other. The guides present different included angles, that is, the oil circuit can still be connected when the aircraft landing gear is retracted or extended through the rotation between the connected rotating shafts and rotating sleeves.

[0010] Preferably, the two openings of the first and second rotary joints are located on opposite sides of the shaft, and the two openings of the third and fourth rotary joints are located on the same side of the shaft, which facilitates pipe bending and reduces interference.

[0011] Preferably, the rotating shaft and the rotating sleeve have circumferential arc grooves on their outer and inner rings, respectively, and steel balls are installed inside to achieve relative rotation between the rotating shaft and the rotating sleeve.

[0012] Preferably, the outer rings on both sides of the through hole of the rotating shaft are grooved in the axial direction to accommodate sealing rings and protective rings, thereby improving sealing performance.

[0013] Preferably, the control valve is equipped with a valve that can move left and right. When the first hydraulic line is used for supply, fluid is supplied to the control valve through the fifth rotating joint, the bend, the third rotating joint, the bend, and the first rotating joint, and further supplied to the wheel-side brake device through the control valve outlet, pushing the valve to the right to block the opening of the second rotating joint; conversely, when the second hydraulic line is used for supply, fluid is supplied to the control valve through the sixth rotating joint, the bend, the fourth rotating joint, the bend, and the second rotating joint, and further supplied to the wheel-side brake device through the control valve outlet, pushing the valve to the left to block the opening of the first rotating joint.

[0014] Preferably, any one of the first, second, third, and fourth rotary joints can be used in reverse order, meaning the inlet and outlet can be used interchangeably. However, to maintain structural stability, it is preferable that the first and second rotary joints are inverted simultaneously, and the third and fourth rotary joints are inverted simultaneously.

[0015] Preferably, sealing rings and protective rings are arranged at the connection points between the first rotary joint, the second rotary joint and the control valve to improve the sealing performance between the rotary joint and the control valve.

[0016] Preferably, the bend is made of rigid material, which is stronger and has a longer service life than flexible plastic tubing.

[0017] The beneficial effects of this invention are:

[0018] It reduces the connection between traditional pipelines and switching valve nozzles, resulting in a smaller space occupation, reliable connection, and low leakage rate; it adopts a hinge-like mechanism to provide pipeline guidance, resulting in a long service life and a large motion compensation angle; the product's integrated design has a compact structure; the rotating pairs are connected by bent pipes to absorb product impact deformation; each rotating pair is equipped with a limit and sealing structure to ensure structural stability and prevent oil leakage, thereby achieving the product's function. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the pipeline guiding device of the present invention from a frontal view angle;

[0021] Figure 2 This is a top-view sectional view of the pipeline guiding device of the present invention;

[0022] Figure 3 This is a schematic diagram showing the state of the pipeline guiding device of the present invention at different rotation angles of the wheel-side brake device during application;

[0023] Marked in the image:

[0024] I: Wheel-side brake device; II: Pipeline guiding device of the present invention; III: Landing gear trolley;

[0025] 1: First rotating pair; 1-1: Rotating shaft of the first rotating pair; 1-2: Rotating sleeve of the first rotating pair; 1-3: Liquid inlet of the first rotating pair; 1-4: Liquid outlet of the first rotating pair;

[0026] 2: Second rotating pair; 2-1: Rotating shaft of the second rotating pair; 2-2: Rotating sleeve of the second rotating pair; 2-3: Liquid inlet of the second rotating pair; 2-4: Liquid outlet of the second rotating pair;

[0027] 3: Third rotating pair; 3-1: Rotating shaft of the third rotating pair; 3-2: Rotating sleeve of the third rotating pair; 3-3: Liquid inlet of the third rotating pair; 3-4: Liquid outlet of the third rotating pair; 3-5: Through hole; 3-6: Steel ball; 3-7: Sealing ring; 3-8: Protective ring;

[0028] 4: Fourth rotating pair; 4-1: Rotating shaft of the fourth rotating pair; 4-2: Rotating sleeve of the fourth rotating pair; 4-3: Liquid inlet of the fourth rotating pair; 4-4: Liquid outlet of the fourth rotating pair;

[0029] 5: Fifth rotating pair; 5-1: Rotating shaft of the fifth rotating pair; 5-2: Rotating sleeve of the fifth rotating pair; 5-3: Liquid inlet of the fifth rotating pair; 5-4: Liquid outlet of the fifth rotating pair;

[0030] 6: Sixth rotating joint; 6-1: Rotating shaft of the sixth rotating joint; 6-2: Rotating sleeve of the sixth rotating joint; 6-3: Liquid inlet of the sixth rotating joint; 6-4: Liquid outlet of the sixth rotating joint;

[0031] 7: Control valve; 7-1: Valve; 7-2: Liquid outlet;

[0032] 8: Bend; 8-1: First bend; 8-2: Second bend; 8-3: Third bend; 8-4: Fourth bend;

[0033] 9: First flange; 10: Second flange; 11: Third flange; 12: Sealing ring; 13: Protective ring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] This application is described below with reference to the accompanying drawings and specific embodiments:

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, the pipeline guiding device with oil circuit conversion function of the present invention includes: a first rotating pair 1, a second rotating pair 2, a third rotating pair 3, a fourth rotating pair 4, a fifth rotating pair 5, and a sixth rotating pair 6. The six rotating pairs have the same main structure, each having a rotating shaft and a rotating sleeve. The rotating shaft and the rotating sleeve can rotate relative to each other, and openings are respectively located on the rotating shaft and the rotating sleeve, with fluid communication between the two openings. Figure 2Taking the structure of the third rotating pair 3 shown as an example, it has a rotating shaft 3-1 and a rotating sleeve 3-2 around one end of the rotating shaft 3-1. The rotating shaft 3-1 and the rotating sleeve 3-2 can rotate relative to each other on their axial sides. Openings 3-3 and 3-4 are respectively arranged on the rotating shaft 3-1 and the rotating sleeve 3-2, and the openings 3-3 and 3-4 form fluid communication inside the rotating shaft 3-1. A control valve 7 is sealed at both ends to the symmetrically arranged first rotating pair 1 and second rotating pair 2, and is respectively connected to the first rotating pair 1 and the second rotating pair 2. The outlets 1-3 and 2-3 of the moving pair 2 are fluidly connected; the inlets 1-4 and 2-4 of the first rotating pair 1 and the second rotating pair 2 are connected to the outlets 3-4 and 4-4 of the third rotating pair 3 and the fourth rotating pair 4 respectively through the second bend 8-2 and the fourth bend 8-4 and are fluidly connected; the inlets 3-3 and 4-3 of the third rotating pair 3 and the fourth rotating pair 4 are connected to the outlets 5-4 and 6-4 of the fifth rotating pair 5 and the sixth rotating pair 6 respectively through the first bend 8-1 and the third bend 8-3 and are fluidly connected.

[0038] Combination Figure 3 The diagram shown illustrates the working principle of the pipeline guiding device II of the present invention when applied to the system (front view). The wheel-side brake device I and the landing gear carriage III are concentric circles that are not on the same plane axially. The control valve 7 is connected to the wheel-side brake device I through the first flange 9 and can rotate with the wheel-side brake device I. The control valve 7 also includes an outlet 7-2 that is fluidly connected to the wheel-side brake device I. The fifth rotating joint 5 and the sixth rotating joint 6 are connected to the landing gear carriage III through the second flange 10 and the third flange 11, respectively. The inlets 5-3 and 6-3 of the fifth rotating joint 5 and the sixth rotating joint 6 are fluidly connected to the first hydraulic pipeline and the second hydraulic pipeline of the landing gear carriage III, respectively.

[0039] In a certain working state, such as Figure 3 As shown in the comparison, when the wheel-side brake device I rotates at different angles, the first rotating joint 1, the second rotating joint 2, and the control valve 7 rotate with the wheel-side brake device I. The rotating shafts and rotating sleeves of the six different rotating joints rotate relative to each other, and the guide tubes 8 exhibit different included angles. Through the rotation between the connected rotating shafts and rotating sleeves, the oil circuit can still be connected when the aircraft landing gear is retracted or extended.

[0040] For the specific structure of the rotating joint, please refer to Figure 2 The structure of the third rotating pair 3 shown is as follows: The rotating pair 3 consists of a rotating shaft 3-1 and a rotating sleeve 3-2 sleeved around one end of the rotating shaft 3-1. The rotating shaft 3-1 and the rotating sleeve 3-2 can rotate relative to each other. They are respectively provided with an outlet 3-4 and an inlet 3-3, and the outlet 3-4 and the inlet 3-3 are in fluid communication within the rotating shaft 3-1.

[0041] At the position of the rotating shaft 3-1 corresponding to the liquid inlet 3-3 at the rotating sleeve 3-2, the rotating shaft 3-1 is a through hole 3-5 in the circumferential range, so that when the rotating sleeve 3-2 rotates relative to the rotating shaft 3-1, the liquid inlet 3-3 at the rotating sleeve 3-2 always maintains fluid communication with the rotating shaft 3-1.

[0042] The rotating shaft 3-1 and the rotating sleeve 3-2 have circular arc grooves on their outer and inner rings, respectively, and have steel balls 3-6 inside, so as to realize the relative rotation of the rotating shaft 3-1 and the rotating sleeve 3-2.

[0043] The outer rings on both sides of the through hole 3-5 of the rotating shaft 3-1 are grooved in the axial direction to accommodate the sealing ring 3-7 and the protective ring 3-8, thereby improving the sealing performance.

[0044] The control valve 7 is equipped with a valve 7-1 that can move left and right. When the first hydraulic line is used for supply, the fluid enters through the inlet 5-3 of the fifth rotating joint 5, and is supplied to the control valve 7 in sequence through the fifth rotating joint 5, the first bend 8-1, the third rotating joint 3, the second bend 8-2 and the first rotating joint 1. The fluid is supplied to the wheel-side brake device I through the outlet 7-2 of the control valve 7, and pushes the valve 7 to move to the right to block the outlet 2-4 of the second rotating joint 2. Conversely, when the second hydraulic line is used for supply, the fluid enters through the inlet 5-3 of the sixth rotating joint, and is supplied to the control valve 7 in sequence through the sixth rotating joint 6, the third bend 8-3, the fourth rotating joint 4, the fourth bend 8-4 and the second rotating joint 2. The fluid is supplied to the wheel-side brake device I through the outlet 7-2 of the control valve 7, and pushes the valve 7-1 to move to the left to block the outlet 1-4 of the first rotating joint 1.

[0045] A sealing ring 12 and a protective ring 13 are arranged between the connection points of the first rotating pair 1, the second rotating pair 2 and the control valve 7.

[0046] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

Claims

1. A pipeline guiding device with oil circuit conversion function, characterized in that, include: The system comprises a first rotating joint, a second rotating joint, a third rotating joint, a fourth rotating joint, a fifth rotating joint, a sixth rotating joint, and a control valve; each of the rotating joints has a rotating shaft and a rotating sleeve sleeved around one end of the rotating shaft, the rotating shaft and the rotating sleeve are capable of rotating relative to each other, and the rotating shaft and the rotating sleeve are respectively provided with an opening, the two openings being fluidly connected inside the rotating shaft; The two ends of the control valve are respectively sealed and connected to the first rotating joint and the second rotating joint, which are symmetrically arranged, and are in fluid communication with one opening of the first rotating joint and the second rotating joint, respectively; The other openings of the first and second rotary joints are respectively fluidly connected to one opening of the third and fourth rotary joints via bends, and the other openings of the third and fourth rotary joints are respectively fluidly connected to one opening of the fifth and sixth rotary joints via bends; The control valve is connected to the wheel-side brake device via a flange and rotates with the wheel-side brake device. The control valve is provided with an outlet that is in fluid communication with the wheel-side brake device. The fifth and sixth rotating joints are respectively connected to the landing gear trolley via flanges, and the other openings of the fifth and sixth rotating joints are respectively fluidly connected to the first and second hydraulic lines on the landing gear trolley. The control valve is equipped with a valve that can move left and right. When the first hydraulic pipeline is used for fluid supply, the fluid sequentially passes through the fifth rotating joint, the bend connecting the fifth rotating joint and the third rotating joint, the third rotating joint, the bend connecting the third rotating joint and the first rotating joint, and the first rotating joint into the control valve, and is supplied to the wheel-side brake device through the outlet of the control valve. The fluid pushes the valve to move towards the second rotating joint to block the opening where the second rotating joint and the control valve are in fluid communication. When the second hydraulic pipeline is used for fluid supply, the fluid sequentially passes through the sixth rotating joint, the bend connecting the sixth rotating joint and the fourth rotating joint, the fourth rotating joint, the bend connecting the fourth rotating joint and the second rotating joint, and the second rotating joint into the control valve, and is supplied to the wheel-side brake device through the outlet of the control valve. The fluid pushes the valve to move towards the first rotating joint to block the opening where the first rotating joint and the control valve are in fluid communication.

2. The pipeline guiding device with oil circuit conversion function according to claim 1, characterized in that, A through hole extending circumferentially along the rotation axis is provided at the position of the rotation axis corresponding to the opening of the rotating sleeve, so that when the rotating sleeve rotates relative to the rotation axis, the opening of the rotating sleeve always maintains fluid communication with the interior of the rotation axis through the through hole.

3. The pipeline guiding device with oil circuit conversion function according to claim 1, characterized in that, The outer ring of the rotating shaft and the inner ring of the rotating sleeve are respectively provided with corresponding circumferential arc grooves, and steel balls are provided in the circumferential arc grooves to realize the relative rotation of the rotating shaft and the rotating sleeve.

4. The pipeline guiding device with oil circuit conversion function according to claim 2, characterized in that, The rotating shaft has annular grooves on both sides of the outer ring of the through hole, and a sealing ring and a protective ring are provided in the annular grooves.

5. The pipeline guiding device with oil circuit conversion function according to claim 1, characterized in that, Any one of the first, second, third, and fourth rotary joints can be reversed so that the liquid inlet and liquid outlet functions of the two openings of the rotary joint can be interchanged.

6. The pipeline guiding device with oil circuit conversion function according to claim 5, characterized in that, The first and second revolute joints are arranged in pairs and simultaneously reversed vertically, and / or the third and fourth revolute joints are arranged in pairs and simultaneously reversed vertically.

7. The pipeline guiding device with oil circuit conversion function according to claim 1, characterized in that, Both the connection point between the first rotating joint and the control valve and the connection point between the second rotating joint and the control valve are provided with sealing rings and protective rings.

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