An automatic and manual integrated exhaust device of an aircraft hydraulic system self-pressurized tank

Abstract

The utility model belongs to the technical field of airplane pressurized fuel tank, disclose a kind of automatic manual integration exhaust device of airplane hydraulic system self-pressurized fuel tank, install in the top of self-pressurized fuel tank of airplane, including manual exhaust component, automatic exhaust component, series connection's upper shell, middle shell and lower shell, exhaust device entrance is located at the bottom of lower shell, manual exhaust component outlet is located at one side of lower shell, manual exhaust component handle is located at another side of lower shell, and automatic exhaust component outlet is located at the top of upper shell;Automatic exhaust component is located in upper shell and middle shell, and manual exhaust component is located in lower shell.The utility model's automatic exhaust component, manual exhaust component share same fluid inlet, and the movement of valve core valve in respective passage realizes the discharge of air, so that self-pressurized fuel tank exhaust device realizes automatic manual integration.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft pressurized fuel tank technology, and relates to a device that can manually vent gas during ground maintenance and automatically vent gas in the system within a certain pressure range during aircraft flight. Specifically, it relates to an automatic and manual integrated venting device for a self-pressurized fuel tank of an aircraft hydraulic system. Background Technology

[0002] In aircraft hydraulic systems, the vent valve on the pressurized oil tank often serves as the venting device for the entire hydraulic system. Currently, vent valves on pressurized oil tanks in aircraft hydraulic systems are mainly divided into manual vent valves and automatic vent valves. However, the application scenarios of these two types of vent valves are limited. Manual vent valves have a single application scenario, used only during the ground phase. They can be used directly to vent air after maintenance tasks, but their operation requires the intervention of maintenance personnel, and the venting time and timing depend on the operator's experience. Automatic vent valves can automatically vent air only when the pressure reaches the designed venting pressure range during the pressurization or depressurization of the aircraft hydraulic system. If the pressure is below or above this range, the seal will close, and venting will not be possible. The drawback of this design feature is that after maintenance, the aircraft hydraulic system often contains a large amount of air. In this case, using only an automatic vent valve requires performing the system pressurization and depressurization process multiple times to completely remove the air, resulting in long venting time, low efficiency, and affecting aircraft dispatch rate.

[0003] Therefore, it is urgent to improve the existing exhaust device for aircraft hydraulic systems so that the exhaust function can cover all stages, improve the exhaust efficiency during ground maintenance, and ensure the automatic exhaust function during the flight phase. Utility Model Content

[0004] Therefore, this utility model provides an automatic and manual integrated venting device for the self-pressurizing oil tank of an aircraft hydraulic system. This venting device integrates both manual and automatic venting functions, fully covering the venting needs of the aircraft during both ground maintenance and flight phases, and greatly improving the venting efficiency after maintenance. It can effectively solve the problems described in the background art.

[0005] The technical solution of this utility model is as follows: An integrated automatic and manual venting device for an aircraft hydraulic system's self-pressurizing oil tank is installed on top of the tank. It includes a manual venting assembly, an automatic venting assembly, and an upper housing, a middle housing, and a lower housing connected in series. The venting device inlet is located at the bottom of the lower housing, the manual venting assembly outlet is located on one side of the lower housing, the manual venting assembly handle is located on the other side of the lower housing, and the automatic venting assembly outlet is located at the top of the upper housing. The automatic venting assembly is located inside the upper and middle housings, and the manual venting assembly is located inside the lower housing.

[0006] Furthermore, the manual exhaust assembly includes an exhaust nozzle, a manual exhaust assembly handle, and a manual exhaust valve assembly. The exhaust nozzle, serving as the outlet of the manual exhaust assembly, is located on the side of the lower housing. The connection point between the exhaust nozzle and the lower housing is blocked by the manual exhaust valve assembly. The other end of the manual exhaust valve assembly is the manual exhaust assembly handle. The manual exhaust valve assembly can move laterally within the lower housing and is reset by a manual exhaust spring.

[0007] Furthermore, the automatic venting assembly includes an upper retaining sleeve, a lower retaining sleeve, an automatic venting valve core valve, a valve seat, and an automatic venting spring. The lower retaining sleeve is located at the internal inlet of the middle housing, and the upper retaining sleeve is located at the outlet of the middle housing. The automatic venting valve core valve slides in the flow channel inside the middle housing. The two valve seats are respectively located on the lower outer circumferential surface of the upper retaining sleeve and the upper outer circumferential surface of the lower retaining sleeve. The automatic venting spring is located between the valve seat and the automatic venting valve core valve. When the automatic venting valve core valve moves upward to a set position against the force of the automatic venting spring, the flow channel between the upper retaining sleeve and the lower retaining sleeve is connected.

[0008] Furthermore, a coarse filter screen is provided between the lower retaining sleeve and the lower housing.

[0009] Furthermore, the upper retaining sleeve and the corresponding valve seat are located inside the upper housing.

[0010] Furthermore, a damping housing is also provided inside the upper housing. The damping housing is located on the radial inner side of the upper retaining sleeve, and an upper filter screen component is provided on the top of the damping housing. The center of the damping housing is a cylindrical or conical through hole, which together with the through hole inside the upper housing forms the rear section of the automatic exhaust channel.

[0011] Technical effects: The automatic and manual venting components of this invention feature highly integrated valve bodies that share a common fluid inlet. Air is vented through the movement of valve cores within their respective channels, thus achieving integrated automatic and manual operation for the self-pressurizing oil tank venting device. The entire device boasts a compact structure and high reliability. This invention is suitable for aircraft hydraulic systems with stringent weight control requirements. Attached Figure Description

[0012] Figure 1 A schematic block diagram illustrating the principle of the exhaust device of the present invention is shown.

[0013] Figure 2 An embodiment of the exhaust device according to the present invention is illustrated schematically.

[0014] Figure 3 A functional block diagram of an embodiment of the exhaust device of the present invention is shown schematically.

[0015] Figure 4 A schematic front view of an embodiment of the exhaust device of the present invention is shown.

[0016] Figure 5 A top view schematically illustrates an embodiment of the exhaust device of the present invention.

[0017] Figure 6 A schematic front sectional view of an embodiment of the exhaust device of the present invention is shown.

[0018] Figure 7 An embodiment of the exhaust device according to the present invention is illustrated schematically.

[0019] Among them, 100—exhaust device, 110—manual exhaust component handle, 120—manual exhaust component outlet (C port), 130—automatic exhaust component outlet (B port), 140—exhaust device inlet (A port), 200—self-pressurizing oil tank, 300—exhaust pipeline, 400—bolt.

[0020] 1—Upper housing, 2—Middle housing, 3—Lower housing, 4—Plug, 5—Dust cap, 6—Exhaust nozzle, 7—Screw, 8—Handle, 9—Lead seal, 10—Upper filter assembly, 11—Damping housing, 12—First O-ring seal, 13—Upper retaining sleeve, 14—Valve seat, 15—Automatic exhaust valve core valve, 16—Adjusting shim, 17—Lower retaining sleeve, 18—Coarse filter, 19—Second O-ring seal, 20—Third O-ring seal, 21—Manual exhaust valve assembly, 22—Manual exhaust spring, 23—Inlet plug, 24—Fourth O-ring seal, 25—Fifth O-ring seal, 26—Automatic exhaust spring, 27—Dust cap, 28—Fuse. Detailed Implementation

[0021] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. Numerous specific design details are set forth in the following detailed description to provide a more complete understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific setup and method set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and device without departing from the spirit of this utility model. In the drawings and the following description, any parts not exhaustively described are considered to be common knowledge or conventional practices in the art.

[0022] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Example 1: An integrated automatic and manual venting device for a self-pressurizing oil tank in an aircraft hydraulic system is installed on top of the self-pressurizing oil tank 200 of the aircraft. It includes a manual venting assembly, an automatic venting assembly, and an upper housing 1, a middle housing 2, and a lower housing 3 connected in series. The venting device inlet 140 is located at the bottom of the lower housing 3, the manual venting assembly outlet 120 is located on one side of the lower housing 3, the manual venting assembly handle 110 is located on the other side of the lower housing 3, and the automatic venting assembly outlet 130 is located at the top of the upper housing 1. The automatic venting assembly is located inside the upper housing 1 and the middle housing 2, and the manual venting assembly is located inside the lower housing 3.

[0024] The manual exhaust assembly includes an exhaust nozzle 6, a manual exhaust assembly handle 110, and a manual exhaust valve assembly 21. The exhaust nozzle 6, serving as the manual exhaust assembly outlet 120, is located on the side of the lower housing 3. The connection point between the exhaust nozzle 6 and the lower housing 3 is blocked by the manual exhaust valve assembly 21. The other end of the manual exhaust valve assembly 21 is the manual exhaust assembly handle 110. The manual exhaust valve assembly 21 can move laterally within the lower housing 3 and is reset by a manual exhaust spring 22.

[0025] The automatic exhaust assembly includes an upper retaining sleeve 13, a lower retaining sleeve 17, an automatic exhaust valve core valve 15, a valve seat 14, and an automatic exhaust spring 26. The lower retaining sleeve 17 is located at the internal inlet of the middle housing 2, and the upper retaining sleeve 13 is located at the outlet of the middle housing 2. The automatic exhaust valve core valve 15 slides in the flow channel inside the middle housing 2. The two valve seats 14 are respectively located on the lower outer circumferential surface of the upper retaining sleeve 13 and the upper outer circumferential surface of the lower retaining sleeve 17. The automatic exhaust spring 26 is located between the valve seat 14 and the automatic exhaust valve core valve 15. When the automatic exhaust valve core valve 15 moves upward to a set position against the force of the automatic exhaust spring 26, the flow channel between the upper retaining sleeve 13 and the lower retaining sleeve 17 is connected.

[0026] A coarse filter screen 18 is provided between the lower retaining sleeve 17 and the lower housing 3.

[0027] The upper retaining sleeve 13 and the corresponding valve seat 14 are located inside the upper housing 1.

[0028] The upper housing 1 is also provided with a damping housing 11, which is located on the radial inner side of the upper retaining sleeve 13. The top of the damping housing 11 is provided with an upper filter screen component 10. The center of the damping housing 11 is a cylindrical or conical through hole, which together with the through hole inside the upper housing 3 forms the rear section of the automatic exhaust channel.

[0029] Example 2: An integrated automatic and manual venting device for a self-pressurizing oil tank in an aircraft hydraulic system, the main structure of which includes a housing assembly and a manual venting assembly and an automatic venting assembly disposed inside the housing assembly.

[0030] The housing assembly includes a fluid inlet (port A) for connecting to the exhaust port of the self-pressurized oil tank of the aircraft hydraulic system; the housing assembly contains the installation positions for the manual exhaust assembly and the automatic exhaust assembly; the housing assembly also includes an automatic exhaust assembly outlet (port B) for connecting to the exhaust pipeline on the aircraft; the housing assembly also includes a manual exhaust assembly outlet (port C) for connecting to the ground exhaust pipeline during ground maintenance.

[0031] The automatic exhaust assembly includes an automatic exhaust channel.

[0032] The manual exhaust assembly includes a human-machine interface, providing maintenance personnel with the operation position to open and close the exhaust channel for the manual exhaust function, and also includes a manual exhaust channel.

[0033] In the above scheme, there is an external sealing device between the automatic venting assembly and the housing assembly, and there is also an external sealing device between the manual venting assembly and the housing assembly to prevent fluid leakage.

[0034] The automatic exhaust channel of the automatic exhaust assembly and the manual exhaust channel of the manual exhaust assembly are sealed together, so that the automatic exhaust function and the manual exhaust function of the exhaust device can work independently.

[0035] like Figure 2 , Figure 4 As shown, this invention provides a self-pressurizing oil tank venting device for an aircraft hydraulic system, comprising a lower housing 3. The interior of the lower housing 3, perpendicular to the lower mounting surface, forms a fluid inflow channel, which serves as the venting device inlet (port A) 140. This inlet is connected to the vent of the self-pressurizing oil tank 200 of the aircraft hydraulic system via several bolts 400. The venting device inlet (port A) 140 of the lower housing 3 is provided with an annular groove, within which an O-ring seal 24 is fitted, creating an end-face seal between the lower housing 3 and the vent of the self-pressurizing oil tank 200. The interior of the lower housing 3, perpendicular to the fluid inflow channel, houses the installation position for the manual venting assembly. The upper part of the lower housing 3 is connected to the lower part of the middle housing 2 via several screws 7. The interior of the middle housing 2 houses the installation position for the automatic venting assembly, and the upper part of the middle housing 2 is connected to the lower part of the upper housing 1 via several screws 7. The upper part of the upper housing 1 is the automatic vent, connected to the aircraft's exhaust pipe 300.

[0036] like Figure 4 , Figure 5 , Figure 6As shown, the manual exhaust assembly includes a handle 8, providing a gripping position for maintenance personnel to open and close the exhaust channel for manual exhaust function; it also includes a screw plug 4, providing an installation position for the manual exhaust valve assembly; the manual exhaust valve assembly contains a manual exhaust spring 22. The handle 8 is riveted to the manual exhaust valve assembly. The manual exhaust assembly also includes an exhaust nozzle 6, which is a manual exhaust port and is protected by a dust cap 5. The dust cap 5 is removed during manual exhaust.

[0037] In the illustrated embodiment, the manual venting assembly is in the closed state. The manual venting valve assembly 21 includes a manual venting valve and a rubber component. The manual venting spring 22 abuts against the rubber component and the lower housing 3 to form a seal. When manual venting is required for the hydraulic system self-pressurizing tank 200, the dust cap 5 is removed, and a transparent venting pipe is connected to the venting nozzle 6 to pressurize the hydraulic system self-pressurizing tank 200 to a certain pressure. Air in the hydraulic system self-pressurizing tank 200 enters the venting device of this invention through the venting device inlet (port A). The maintenance personnel pull the handle 8 outward. Since the handle 8 is riveted to the manual venting valve assembly 21, it moves the manual venting valve assembly 21 outward, compressing the manual venting spring 22. A fluid flow channel is formed between the manual venting valve assembly 21 and the lower housing 3, and the air in the hydraulic system self-pressurizing tank 200 is discharged outward through the manual venting assembly outlet (port C) 120.

[0038] In the above embodiment, the screw plug 4 is threadedly connected to the lower housing 3, and an external sealing device is disposed at the end of the thread. The external sealing device is an O-ring 19.

[0039] In the above embodiment, an annular groove exists between the screw plug 4 and the manual exhaust valve assembly 21, and a sealing device is provided in the groove to form a dynamic seal between the screw plug and the manual exhaust valve assembly. The external sealing device is an O-ring 20.

[0040] In the above embodiment, the exhaust nozzle 6 is threadedly connected to the lower housing 3, and an external sealing device is disposed at the end of the thread. The external sealing device is an O-ring 25.

[0041] In the above embodiment, the automatic exhaust assembly is in the closed state, including a lower filter screen component 18 to filter contaminants in the fluid; it also includes a lower retaining sleeve 17 to provide an installation position for the valve seat 14, and the valve seat 14 and the automatic exhaust valve core valve 15 cooperate vertically to form a seal. The automatic exhaust valve core valve 15 contains an automatic exhaust spring 26, the lower end of which presses against the automatic exhaust valve core valve 15, and the upper end of which presses against the upper retaining sleeve 17. The upper retaining sleeve 17 provides an installation position for the automatic exhaust spring 26, the damping housing 11, the upper filter screen component 10, and the coarse filter screen 18.

[0042] In the above embodiment, an adjusting shim 16 is used between the automatic exhaust spring 26 and the automatic exhaust valve core valve 15 to adjust the compression of the automatic exhaust spring 26, thereby adjusting the opening pressure and closing pressure of the automatic exhaust assembly.

[0043] In the above embodiment, the outer mounting surface of the automatic exhaust valve core valve 15 has several annular grooves, and the annular grooves and the interior of the above-mentioned housing 2 form the front section of the automatic exhaust channel.

[0044] In the above embodiments, the upper retaining sleeve 13 and the damping housing 11 have cylindrical and conical through holes at their centers, which together with the through holes inside the upper housing 3 form the rear section of the automatic exhaust channel.

[0045] In the above embodiment, the automatic exhaust process is as follows: when the fluid pressure at the exhaust device inlet (port A) is within the designed pressure range, the fluid pressure received by the automatic exhaust valve core valve 15 is greater than the spring force generated by the compression of the automatic exhaust spring 26. The automatic exhaust valve core valve 15 moves outward, and the gas passes through the annular groove on the outer mounting surface of the automatic exhaust valve core valve 15, reaches the central hole in the upper retaining sleeve 13 and the damping housing 11, and flows to the outlet (port B) 130 of the automatic exhaust assembly; when the fluid pressure at the exhaust device inlet (port A) is greater than the designed pressure range, the automatic exhaust valve core valve 15 moves to the upper limit position, cooperates with the middle housing 2 to form a seal, the automatic exhaust channel is closed, and the automatic exhaust assembly loses its exhaust capability.

[0046] Figure 7 In another embodiment of the present invention, the manual venting assembly is a spring-loaded manual venting assembly, which uses a spring to press the valve core against the valve body to achieve a seal. When venting is required, the maintenance personnel press the handle, and the valve core moves to create a gap, thus venting. The automatic venting assembly is a traditional mechanical automatic venting valve, which uses a float-type working principle for venting. The manual venting assembly and the automatic venting assembly share the same venting device inlet (port A).

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An integrated automatic and manual venting device for a self-pressurizing oil tank in an aircraft hydraulic system, characterized in that, Installed on top of the self-pressurized fuel tank (200) of the aircraft, it includes a manual exhaust assembly, an automatic exhaust assembly, an upper housing (1), a middle housing (2), and a lower housing (3) connected in series. The exhaust device inlet (140) is located at the bottom of the lower housing (3), the manual exhaust assembly outlet (120) is located on one side of the lower housing (3), the manual exhaust assembly handle (110) is located on the other side of the lower housing (3), and the automatic exhaust assembly outlet (130) is located at the top of the upper housing (1). The automatic exhaust assembly is located inside the upper housing (1) and the middle housing (2), and the manual exhaust assembly is located inside the lower housing (3).

2. The automatic and manual integrated venting device for a self-pressurizing oil tank in an aircraft hydraulic system according to claim 1, characterized in that, The manual exhaust assembly includes an exhaust nozzle (6), a manual exhaust assembly handle (110), and a manual exhaust valve assembly (21). The exhaust nozzle (6) serves as the manual exhaust assembly outlet (120) and is located on the side of the lower housing (3). The connection between the exhaust nozzle (6) and the lower housing (3) is blocked by the manual exhaust valve assembly (21). The other end of the manual exhaust valve assembly (21) is the manual exhaust assembly handle (110). The manual exhaust valve assembly (21) can move laterally within the lower housing (3). The manual exhaust valve assembly (21) is reset by the manual exhaust spring (22).

3. The automatic and manual integrated venting device for a self-pressurizing oil tank in an aircraft hydraulic system according to claim 2, characterized in that, The automatic exhaust assembly includes an upper retaining sleeve (13), a lower retaining sleeve (17), an automatic exhaust valve core valve (15), a valve seat (14), and an automatic exhaust spring (26). The lower retaining sleeve (17) is located at the inlet of the middle housing (2), and the upper retaining sleeve (13) is located at the outlet of the middle housing (2). The automatic exhaust valve core valve (15) slides in the flow channel inside the middle housing (2). The two valve seats (14) are respectively located on the lower outer circumferential surface of the upper retaining sleeve (13) and the upper outer circumferential surface of the lower retaining sleeve (17). The automatic exhaust spring (26) is located between the valve seat (14) and the automatic exhaust valve core valve (15). When the automatic exhaust valve core valve (15) moves upward to a set position against the force of the automatic exhaust spring (26), the flow channel between the upper retaining sleeve (13) and the lower retaining sleeve (17) is connected.

4. The automatic and manual integrated venting device for a self-pressurizing oil tank in an aircraft hydraulic system according to claim 3, characterized in that, A coarse filter screen (18) is provided between the lower retaining sleeve (17) and the lower housing (3).

5. The automatic and manual integrated venting device for a self-pressurizing oil tank in an aircraft hydraulic system according to claim 3, characterized in that, The upper retaining sleeve (13) and the corresponding valve seat (14) are located inside the upper housing (1).

6. The automatic and manual integrated venting device for a self-pressurizing oil tank in an aircraft hydraulic system according to claim 3, characterized in that, The upper housing (1) is also provided with a damping housing (11), which is located on the radial inner side of the upper retaining sleeve (13). The top of the damping housing (11) is provided with an upper filter screen component (10). The center of the damping housing (11) is a cylindrical or conical through hole, which together with the through hole inside the upper housing (1) forms the rear section of the automatic exhaust channel.

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