Water seal test device and seal test method for hatch seal

Abstract

The application discloses a water seal test device and a sealing test method for a cabin door sealing element. The water seal test device comprises a sealing box body, the sealing box body is provided with a mounting position for mounting the cabin door sealing element; a pressure applying element is movably mounted on the sealing box body, and the pressure applying element is used for being in mutual extrusion contact with the cabin door sealing element and dividing the space in the sealing box body into a first chamber and a second chamber, the pressure applying element is moved to adjust the compression amount of the cabin door sealing element; a first pressure control assembly is connected with the first chamber and used for controlling the pressure of the first chamber; and a second pressure control assembly is connected with the second chamber and used for controlling the pressure of the second chamber. The water seal test device can be used for testing the leakage of the cabin door sealing element under different compression amounts, the multiple mounting and clamping for testing different compression amounts are effectively avoided, the sealing test demand of the water entry working condition can be met, and the operation difficulty and cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing test, more particularly, to a water sealing test device for a cabin door sealing element and a sealing test method. BACKGROUND

[0002] The sealing performance of a cabin door of an aircraft has an important influence on flight safety, and the airworthiness document also has strict requirements on the sealing performance of the cabin door. The water leakage rate of the cabin door sealing element after the aircraft is ditched into water is clearly specified in the airworthiness document. Accurate measurement of the leakage rate of the cabin door sealing element of the aircraft under various working conditions is an important basis for improving the sealing performance of the cabin door sealing element and improving the design of the sealing element and the sealing element pressure head. Accurate measurement of the water leakage rate of the cabin door sealing element when the aircraft is ditched into water will effectively provide an opportunity for escape and survival and ensure the safety of the aircraft structure.

[0003] In the related art, a fixed loading plate is used to compress the sealing element to measure the gas leakage rate of the sealing element under the same pressure difference. This test method is not suitable for water sealing working conditions, and the fixed loading plate cannot test the leakage under different compression amounts of the sealing element. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a water sealing test device for a cabin door sealing element, which can be used to test the leakage of the cabin door sealing element under different compression amounts and water entry working conditions.

[0005] Another object of the present application is to provide a sealing test method using the above-mentioned water sealing test device.

[0006] The water sealing test device for a cabin door sealing element according to an embodiment of the present application comprises: a sealing box body having a mounting position for mounting a cabin door sealing element inside; a pressure applying element movably mounted to the sealing box body, and configured to be in mutual extrusion contact with the cabin door sealing element and to divide the space inside the sealing box body into a first chamber and a second chamber, the pressure applying element being movable to adjust the compression amount of the cabin door sealing element; a first pressure control assembly connected to the first chamber and configured to control the pressure of the first chamber; and a second pressure control assembly connected to the second chamber and configured to control the pressure of the second chamber.

[0007] The water sealing test device of the hatch seal according to the embodiment of the present application can be used for liquid leakage test, meets the sealing test requirement of water entry condition, and reduces operation difficulty and cost, and can provide reliable basis for hatch seal and component design matched with the hatch seal.

[0008] In addition, the water sealing test device of the hatch seal according to the above embodiment of the present application can further have the following additional technical features:

[0009] According to some embodiments of the present application, the pressure applying part comprises a pressure applying portion and an adjusting portion, the adjusting portion is threadedly matched with the sealing box body, and the pressure applying portion is located at one side of the adjusting portion close to the installation position and is used for extruding the hatch seal.

[0010] According to some embodiments of the present application, the sealing box body comprises a box body and a mounting rack mounted on the box body, the box body has the installation position inside, the pressure applying portion is arranged in the box body, and the adjusting portion is located outside the box body and is threadedly matched with the mounting rack.

[0011] According to some embodiments of the present application, the first pressure control assembly comprises a first tank body, a first connecting pipe and a first air inlet valve, the first connecting pipe connects a lower opening of the first tank body and the first chamber, and the first air inlet valve is arranged at an upper opening of the first tank body.

[0012] According to some embodiments of the present application, the first pressure control assembly comprises a first pressure sensor arranged in the first chamber and used for detecting fluid pressure in the first chamber; and / or, the first pressure control assembly comprises a first flow meter arranged in the first connecting pipe and used for detecting liquid flow into the first chamber.

[0013] According to some embodiments of the present application, the second pressure control assembly comprises a second tank body, a second connecting pipe and a second air inlet valve, the second connecting pipe connects a lower opening of the second tank body and the second chamber, and the second air inlet valve is arranged at an upper opening of the second tank body.

[0014] According to some embodiments of the present application, the second pressure control assembly comprises a second pressure sensor arranged in the second chamber and used for detecting fluid pressure in the second chamber; and / or, the second pressure control assembly comprises a second flow meter arranged in the second connecting pipe and used for detecting liquid flow leaking into the second chamber.

[0015] According to some embodiments of the present application, the water seal test device further comprises a flexible sealing structure sealing the gap between the hatch seal and the sealing box, and sealing the gap between the pressure applying member and the sealing box.

[0016] According to some embodiments of the present application, the pressure applying member and the sealing box are adhesively sealed with the flexible sealing structure, and the flexible sealing structure is adhesively sealed with the hatch seal.

[0017] According to some embodiments of the present application, the flexible sealing structure comprises two flexible sealing members respectively located in the first chamber and the second chamber.

[0018] According to some embodiments of the present application, the flexible sealing member comprises a first plate body, a second plate body and a connecting plate body connecting the first plate body and the second plate body, the first plate body is sealingly connected with the inner wall of the sealing box, the second plate body is sealingly connected with the pressure applying member, and the connecting plate body is sealingly connected with the outer surface of the hatch seal.

[0019] The sealing test method of the hatch seal according to the embodiments of the present application adopts the water seal test device of the hatch seal according to the embodiments of the present application, and the sealing test method comprises the following steps: installing the hatch seal into the installation position in the sealing box; adjusting the compression amount of the pressure applying member on the hatch seal; injecting a certain amount of liquid into the first chamber and controlling the pressure in the first chamber through the first pressure control assembly; controlling the pressure in the second chamber through the second pressure control assembly; after the pressures in the first chamber and the second chamber are stabilized, detecting the leakage of the hatch seal.

[0020] According to some embodiments of the present application, the detection of the leakage of the hatch seal comprises: calculating the leakage rate of the hatch seal according to the formula L*R=Q / (△P*L), and △P=P1-P2, wherein L is the effective length of the hatch seal; R is the leakage rate of the hatch seal; Q is the liquid flow rate leaked into the second chamber; P1 is the liquid pressure in the first chamber; and P2 is the liquid pressure in the second chamber.

[0021] According to some embodiments of the present application, the first pressure control assembly comprises a first tank body connected with the first chamber, and the injection of a certain amount of liquid into the first chamber and the control of the pressure in the first chamber through the first pressure control assembly comprises: injecting half of the liquid amount into the first tank body; and injecting gas into the first tank body according to the target hatch water entry depth to adjust the liquid pressure in the first chamber.

[0022] According to some embodiments of the present application, the second pressure control component comprises a second tank connected to the second chamber, and the controlling the pressure in the second chamber by the second pressure control component comprises: introducing gas into the second tank according to a target cabin air pressure to adjust the air pressure in the second chamber.

[0023] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a schematic view of a water seal test device according to an embodiment of the present application;

[0026] Figure 2 is a schematic view of a partial structure of a water seal test device according to an embodiment of the present application;

[0027] Figure 3 is a schematic view of a flexible seal according to an embodiment of the present application;

[0028] Figure 4 is a flow chart of a seal test method according to an embodiment of the present application;

[0029] Figure 5 is a flow chart of a seal test method according to a specific embodiment of the present application.

[0030] REFERENCE NUMERALS:

[0031] water seal test device 1; hatch seal 2;

[0032] seal box 10; first chamber 101; second chamber 102; mounting seat 11; box body 12; box body 121; box cover 122; mounting frame 13;

[0033] pressure applying member 20; pressure applying part 21; adjusting part 22;

[0034] first pressure control component 30; first tank 31; first connecting pipe 32; first air inlet valve 33; first pressure sensor 34; first flow meter 35;

[0035] second pressure control component 40; second tank 41; second connecting pipe 42; second air inlet valve 43; second pressure sensor 44; second flow meter 45;

[0036] Flexible sealing structure 50; flexible seal 51; first plate body 521; second plate body 522; connecting plate body 523. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same or like elements or components. The embodiments described below are exemplary, and are not intended to be limiting.

[0038] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the description of the present application, "first feature" and "second feature" can include one or more of the features, and the meaning of "a plurality of" is two or more, and "above" or "below" the first feature with respect to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature therebetween, and "above", "over" and "on" the first feature with respect to the second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height.

[0040] The sealing performance of the aircraft cabin door has an important influence on flight safety, and the airworthiness document also has strict requirements on the sealing performance of the cabin door. The water leakage rate of the cabin door seal after the aircraft ditching into water is clearly specified in the airworthiness document. Accurate measurement of the leakage rate of the aircraft cabin door seal under various working conditions is an important basis for improving the sealing performance of the aircraft cabin door seal and improving the design of the seal and the seal head. Accurate measurement of the water leakage rate of the cabin door seal when the aircraft ditching into water will effectively provide the opportunity for escape and survival, and ensure the safety of the aircraft structure.

[0041] The inventor has found that the sealing test of the whole cabin door is difficult and costly, especially the sealing test of the cabin door when the airplane is forced to land on water. When the airplane is forced to land on water, the pressure difference between the inside and outside of the cabin changes with different water entry depths, and the leakage rate of the cargo door at the bottom of the airplane also changes. The compression amount of the sealing member of the cabin door is different, and the leakage rate of the sealing member is also different. Therefore, it is particularly important to develop a special test device and test method for the water sealing performance of the fabric rubber cabin door sealing member. However, the special water working condition and the variable test parameters bring inconvenience to the design of the water sealing test device.

[0042] In the related art, a pressure difference is formed on both sides of the sealing member by means of air inflation and air extraction, and a fixed loading plate is used to compress the cabin door sealing member, so as to realize the measurement of the gas leakage rate of the cabin door sealing member under the same pressure difference. However, this test method is not applicable to the water sealing condition, and the fixed loading plate cannot test the leakage under different compression amounts of the sealing member.

[0043] Therefore, the water sealing test device 1 for the cabin door sealing member 2 is provided, which can be used for the sealing detection of gas and liquid, and can test the leakage under different compression amounts of the cabin door sealing member 2. The water sealing test device 1 can realize the test of the cabin door sealing member 2 under various conditions by means of one device, has high practicability, reduces the difficulty and cost of the sealing test, and provides a basis for the design of the cabin door sealing member 2 and the components matched with the cabin door sealing member 2.

[0044] The water sealing test device 1 for the cabin door sealing member 2 according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0045] Referring to Figures 1-3 As shown in the drawings, the water sealing test device 1 for the cabin door sealing member 2 according to the embodiments of the present application can include a sealing box body 10, a pressure applying member 20, a first pressure control assembly 30, and a second pressure control assembly 40.

[0046] Specifically, the sealing box body 10 has a mounting position for mounting the cabin door sealing member 2.

[0047] The mounting position is a position for mounting the cabin door sealing member 2. In other words, the cabin door sealing member 2 to be detected can be mounted to the mounting position in the sealing box body 10, so as to realize the mounting and fixation of the cabin door sealing member 2, and avoid the displacement of the cabin door sealing member 2 during the test to affect the test accuracy.

[0048] Here, the cabin door seal 2 can be a complete cabin door seal 2 for a cabin door, or a seal sample formed by a part of the complete cabin door seal 2. The cabin door seal 2 can be an aviation fabric rubber material, or other materials that can be used for sealing, which is not limited in the present application. The cabin door seal 2 can be an aviation seal, such as a seal for an aircraft cabin door, or a seal for a cabin door of other equipment, which will be described below taking the seal for an aircraft cabin door as an example.

[0049] In addition, it should be noted that the present application does not specially limit the specific structure of the mounting position. It can be a part of the sealing box 10 as a mounting position, or other components can be additionally provided in the sealing box 10 to form a mounting position. For example Figure 1 and Figure 2 As shown, the sealing box 10 is provided with a mounting seat 11, which provides a mounting position for mounting the cabin door seal 2. The cross section of the mounting seat 11 perpendicular to the length direction of the cabin door seal 2 (such as the front-back direction shown in Figure 2 ) is L-shaped, which is used to simulate the structure of the cabin door frame, on the one hand to ensure the stable installation of the cabin door seal 2 on the mounting seat 11, and on the other hand to simulate the actual installation structure of the cabin door seal 2 as much as possible to improve the accuracy of the sealing performance test.

[0050] In addition, as shown in Figure 1 and Figure 2 , the pressure applying member 20 is movably installed in the sealing box 10, and the pressure applying member 20 is used to be in mutual extrusion contact with the cabin door seal 2 and to divide the space in the sealing box 10 into a first chamber 101 and a second chamber 102. The pressure applying member 20 is moved to adjust the compression amount of the cabin door seal 2. The first pressure control assembly 30 is connected with the first chamber 101 and is used to control the pressure of the first chamber 101. The second pressure control assembly 40 is connected with the second chamber 102 and is used to control the pressure of the second chamber 102.

[0051] The pressure of the first chamber 101 can be greater than the pressure of the second chamber 102, so that the first chamber 101 is formed as a high-pressure chamber and the second chamber 102 is formed as a low-pressure chamber; or the pressure of the first chamber 101 can be less than the pressure of the second chamber 102, so that the first chamber 101 is formed as a low-pressure chamber and the second chamber 102 is formed as a high-pressure chamber.

[0052] The compression amount of the cabin door seal 2 by the cabin door is different, and the leakage rate of the cabin door seal 2 is also different. And when the aircraft ditch in water, with different water entry depth, the pressure difference between the inside and outside of the cabin changes constantly, and the leakage rate of the cabin door seal 2 also changes.

[0053] The present application can simulate the working conditions of different compression amounts of the cabin door to the cabin door seal 2 by moving the pressure applying piece 20 to change the extrusion force on the cabin door seal 2, so as to facilitate continuous measurement of the leakage process of the aircraft cabin door after entering the water under different compression amounts, and effectively avoid multiple clamping during testing under different compression amounts. Therefore, the water sealing test device 1 only needs to move the pressure applying piece 20 to measure the leakage under different compression amounts, the water sealing test device 1 has the characteristics of high testing efficiency and comprehensive working condition simulation, low operation difficulty and low cost, and greatly facilitates the design of the cabin door seal 2 and the components cooperating with the cabin door seal 2 (such as the pressure applying piece 20 which can simulate the seal pressure head cooperating with the cabin door seal 2).

[0054] In the present application, the first pressure control assembly 30 can control the pressure in the first chamber 101 to be at a fixed target value; or the first pressure control assembly 30 can control the pressure in the first chamber 101 to be at different target values to simulate different pressure working conditions, such as simulating the water pressure at different water entry depths. Similarly, the second pressure control assembly 40 can control the pressure in the second chamber 102 to be at a fixed target value; or the second pressure control assembly 40 can control the pressure in the second chamber 102 to be at different target values to simulate different pressure working conditions.

[0055] Among them, by controlling the pressure of the first chamber 101 through the first pressure control assembly 30 and controlling the pressure of the second chamber 102 through the second pressure control assembly 40, different pressure differences between the first chamber 101 and the second chamber 102 are formed, which can simulate different water entry depths. In this embodiment, the water sealing test device 1 can be suitable for sealing test of the cabin door seal 2 under different working conditions, reduce the design and test cost of the cabin door seal 2, and greatly reduce the operation difficulty.

[0056] For example, when simulating the aircraft water entry working condition, water can be introduced into the first chamber 101 and the water pressure in the first chamber 101 can be controlled by the first pressure control assembly 30 to simulate the aircraft water entry state; the air pressure in the second chamber 102 can be controlled by the second pressure control assembly 40 to simulate the state under different air pressures in the aircraft cabin.

[0057] Of course, it should be noted that the water sealing test device 1 can not only be used to detect the liquid leakage of the cabin door seal 2 (for example, liquid is introduced into the first chamber 101 or the first chamber 102 at this time), but also can be used to detect the gas leakage of the cabin door seal 2 (for example, no liquid is introduced into the first chamber 101 and the second chamber 102 at this time). Corresponding to the required test working condition, the "pressure of the first chamber 101" and the "pressure of the second chamber 102" can be air pressure or liquid pressure.

[0058] The water sealing test device 1 of the hatch seal 2 according to the embodiment of the present application can be used for the leakage test of the hatch seal 2 under different compression amounts by moving the pressing member 20 to adjust the compression amount of the hatch seal 2, effectively avoiding the multiple clamping for the test under different compression amounts, and can be used for the liquid leakage test, meeting the sealing test requirement under the water condition, reducing the operation difficulty and cost, and providing a reliable basis for the design of the hatch seal 2 and the components matched with the hatch seal 2.

[0059] The pressing member 20 according to some embodiments of the present application will be described below with reference to the accompanying drawings.

[0060] According to some embodiments of the present application, as shown in Figure 1 and Figure 2 The pressing member 20 can include a pressing part 21 and an adjusting part 22. The adjusting part 22 is threadedly connected with the sealing box 10, and the pressing part 21 is located on the side of the adjusting part 22 close to the installation position, and the pressing part 21 is used to press the hatch seal 2.

[0061] The adjusting part 22 can be rotated relative to the sealing box 10 through the threaded connection structure, so as to realize the approaching or moving away of the adjusting part 22 relative to the installation position, thereby driving the pressing part 21 to move in the direction close to the installation position or move away from the installation position, and realizing the continuous adjustment of the compression amount. For example Figure 1 As shown in the figure, the adjusting part 22 is rotated to move upward relative to the sealing box 10, so as to increase the distance between the adjusting part 22 and the installation position, and the pressing part 21 can move away from the installation position, thereby increasing the installation space of the hatch seal 2, and the compression amount of the hatch seal 2 is reduced; the adjusting part 22 is rotated to move downward relative to the sealing box 10, so as to reduce the distance between the adjusting part 22 and the installation position, and the pressing part 21 can approach the installation position, thereby reducing the installation space of the hatch seal 2, and the compression amount of the hatch seal 2 is increased.

[0062] It should be noted that the adjusting part 22 and the pressing part 21 can be fixedly connected to ensure that the pressing part 21 moves synchronously with the adjusting part 22; or the adjusting part 22 and the pressing part 21 can be rotatably connected or abutted, so that the pressing part 21 does not rotate synchronously with the adjusting part 22, thereby avoiding the rotation of the pressing part 21 relative to the hatch seal 2, and being beneficial to the stability of the cooperation between the pressing part 21 and the hatch seal 2, and preventing misalignment.

[0063] In addition, it should be noted that the specific structure of the adjusting part 22 and the pressing part 21 is not limited. For example, the adjusting part 22 can be a threaded part such as a screw, a bolt, a screw rod, etc. For example, the pressing part 21 can move along the length direction of the hatch seal 2 (such as Figure 2The pressing part 21 extends in a strip shape along the front-rear direction of the cabin door seal 2, so that the pressing part 21 can be pressed against the cabin door seal 2 in a large range from one end to the other end of the cabin door seal 2.

[0064] In some embodiments, the specific structure of the pressing part 21 can be the same as that of the seal pressing head on the cabin door of the airplane for pressing sealing with the cabin door seal 2, so as to more truly simulate the actual sealing state and provide a test basis for the design of the seal pressing head.

[0065] In some embodiments, as shown in Figure 1 The sealing box 10 includes a box body 12 and a mounting frame 13 mounted on the box body 12. The box body 12 has a mounting position inside, the pressing part 21 is arranged in the box body 12, the adjusting part 22 is located outside the box body 12, and the adjusting part 22 is threadedly connected with the mounting frame 13.

[0066] The box body 12 can provide a mounting space for the cabin door seal 2 and facilitate the definition of the first chamber 101 and the second chamber 102. The adjusting part 22 is located outside the box body 12, which can reduce the interference of the adjusting part 22 during rotation with the seal inside the box body 12. The exposure of the adjusting part 22 also facilitates the rotation operation of the adjusting part 22, making the compression amount adjustment more convenient and accurate. The pressing part 21 arranged in the box body 12 can facilitate the cooperation with the adjusting part 22. The mounting frame 13 and the box body 12 are in a split structure, so that the materials of the two can be selected according to the needs. For example, the mounting frame 13 can be a metal frame, which is not easy to wear and tear, and is beneficial to improve the reliability and service life of the threaded connection with the adjusting part 22.

[0067] In some specific embodiments, as shown in Figure 1 The box body 12 includes a box body 121 and a box cover 122, and the box cover 122 is arranged on the box body 121 to cooperate with the box body 121 to define a mounting space, facilitating the assembly of the mounting seat 11, the cabin door seal 2, the pressing part 21, and the like with the box body 12. The pressing part 21 can be arranged in the box cover 122, and the mounting frame 13 is arranged on the side of the box cover 122 away from the box body 121.

[0068] In some embodiments of the present application, as shown in Figure 1 The first pressure control assembly 30 can include a first tank 31, a first connecting pipe 32, and a first air inlet valve 33. The first connecting pipe 32 connects the lower opening of the first tank 31 and the first chamber 101, and the first air inlet valve 33 is arranged at the upper opening of the first tank 31.

[0069] Here, the upper opening and the lower opening include but are not limited to the upper opening being located at the uppermost end of the first tank 31 and the lower opening being located at the lowermost end of the first tank 31. It is only required that the vertical height of the upper opening is higher than that of the lower opening.

[0070] The first inlet valve 33 can be used to introduce gas into the first tank 31 to control the pressure in the first tank 31, and the first tank 31 is in communication with the first chamber 101, so the pressure in the first chamber 101, such as the gas pressure or the liquid pressure, can be controlled. Thus, the pressure in the first chamber 101 can be controlled by the first pressure control assembly 30 to simulate different cabin door water entry depths or different air pressures outside the cabin.

[0071] In some embodiments, continuing to refer to Figure 1 As shown, the first pressure control assembly 30 can include a first pressure sensor 34, which is arranged in the first chamber 101 and is used to detect the fluid pressure in the first chamber 101. For example, when the first chamber 101 is filled with liquid, the first pressure sensor 34 can detect the liquid pressure (such as water pressure); when the first chamber 101 is filled with gas, the first pressure sensor 34 can detect the gas pressure.

[0072] By detecting the fluid pressure through the first pressure sensor 34, the first pressure control assembly 30 can control the gas inlet state of the first inlet valve 33 according to the detection result fed back by the first pressure sensor 34, so as to accurately control the fluid pressure in the first chamber 101, and also can calculate or judge the leakage of the fluid according to the detection result fed back by the first pressure sensor 34.

[0073] In some embodiments, continuing to refer to Figure 1 As shown, the first pressure control assembly 30 can include a first flow meter 35. The first flow meter 35 is arranged in the first connecting pipe 32 and is used to detect the liquid flow (such as liquid mass) flowing into the first chamber 101. By the first flow meter 35, the amount of fluid flowing into the first chamber 101 can be accurately measured, so as to accurately calculate or judge the leakage of the fluid.

[0074] In some embodiments of the present application, as Figure 1 As shown, the second pressure control assembly 40 includes a second tank 41, a second connecting pipe 42 and a second inlet valve 43. The second connecting pipe 42 connects the lower opening of the second tank 41 and the second chamber 102, and the second inlet valve 43 is arranged at the upper opening of the second tank 41.

[0075] Here, the upper opening and the lower opening include but are not limited to the upper opening being located at the uppermost end of the second tank 41 and the lower opening being located at the lowermost end of the second tank 41, as long as the vertical height of the upper opening is higher than that of the lower opening.

[0076] The second inlet valve 43 can be used to introduce or extract gas into or from the second tank 41 to control the pressure in the second tank 41 to simulate the air pressure in different cabins, and the second tank 41 is in communication with the second chamber 102, so that the air pressure in different cabins can act on the fluid or the hatch seal 2 at the second chamber 102.

[0077] In some embodiments, continuing to refer to Figure 1 As shown in FIG. 1, the second pressure control assembly 40 can include a second pressure sensor 44. The second pressure sensor 44 is arranged in the second chamber 102, and the second pressure sensor 44 is used to detect the fluid pressure in the second chamber 102.

[0078] By detecting the fluid pressure through the second pressure sensor 44, the second pressure control assembly 40 can control the ventilation state of the second inlet valve 43 according to the detection result fed back by the second pressure sensor 44 to accurately control the fluid pressure in the second chamber 102; after part of the water has entered the second chamber 102, the leakage of the fluid can be calculated or judged according to the detection result fed back by the second pressure sensor 44.

[0079] In some embodiments, continuing to refer to Figure 1 As shown in FIG. 1, the second pressure control assembly 40 can include a second flow meter 45, and the second flow meter 45 is arranged in the second connecting pipe 42 and is used to detect the flow of the liquid leaked into the second chamber 102. By the second flow meter 45, the amount of the fluid leaked into the second chamber 102 can be accurately measured, so as to accurately calculate or judge the leakage of the fluid.

[0080] According to some embodiments of the present application, as Figures 1-3 As shown in FIG. 1, the water sealing test device 1 can further include a flexible sealing structure 50. The flexible sealing structure 50 seals the gap between the hatch seal 2 and the sealing box 10, and the flexible sealing structure 50 seals the gap between the pressure applying member 20 and the sealing box 10.

[0081] The flexible sealing structure 50 has flexibility, which on the one hand is conducive to improving the sealing effect of the gap between the hatch seal 2 and the sealing box 10 and the gap between the pressure applying member 20 and the sealing box 10, and on the other hand, the flexible sealing structure 50 can be deformed to adapt to the movement of the pressure applying member 20 relative to the sealing box 10 and the change of the compression amount of the hatch seal 2, thereby ensuring the reliability of the sealing under different compression amounts. For example, the flexible sealing structure 50 can be made of rubber, silicone or the like, such as nitrile rubber, which is corrosion resistant and has good mechanical properties and is easy to bond; for example, the flexible sealing structure 50 can be elongated by more than 50%.

[0082] Further, the gap between the hatch seal 2 and the sealing box 10 and the gap between the pressure applying member 20 and the sealing box 10 are sealed by the flexible sealing structure 50, so that the fluid can not flow between the first chamber 101 and the second chamber 102 through the gap between the hatch seal 2 and the sealing box 10 and the gap between the pressure applying member 20 and the sealing box 10, that is, the fluid leakage channel only exists between the pressure applying member 20 and the hatch seal 2, which is beneficial to improve the accuracy of the leakage condition test.

[0083] In some embodiments, the pressure applying member 20 and the sealing box 10 are adhesively sealed with the flexible sealing structure 50, and the flexible sealing structure 50 is adhesively sealed with the hatch seal 2. Compared with the contact sealing and other sealing modes, the adhesive sealing has better sealing effect, good waterproof and anti-dislocation effect, and better effect of improving the accuracy of the leakage condition test.

[0084] In some embodiments of the present application, the specific structure of the flexible sealing structure 50 can be flexibly set according to actual conditions, for example, the flexible sealing structure 50 can be an integral piece or a split piece.

[0085] In some embodiments, as shown in Figure 1 and Figure 2 , the flexible sealing structure 50 includes two flexible sealing members 51, which are respectively located in the first chamber 101 and the second chamber 102, that is, on both sides of the pressure applying member 20. The flexible sealing member 51 located in the first chamber 101 can seal the gap between the cavity wall of the first chamber 101 and the hatch seal 2 and the gap between the cavity wall of the first chamber 101 and the pressure applying member 20; the flexible sealing member 51 located in the second chamber 102 can seal the gap between the cavity wall of the second chamber 102 and the hatch seal 2 and the gap between the cavity wall of the second chamber 102 and the pressure applying member 20. In this way, the two flexible sealing members 51 can not only achieve effective sealing, but also will not interfere with the position of the pressure applying member 20, so that the pressure applying member 20 moves more smoothly and the device is easier to assemble.

[0086] In some specific embodiments, as shown in Figures 1-3 , the flexible sealing member 51 can include a first plate body 521, a second plate body 522 and a connecting plate body 523. The connecting plate body 523 connects the first plate body 521 and the second plate body 522, so that the flexible sealing member 51 forms a whole by itself. The first plate body 521 is sealingly connected with the inner wall of the sealing box 10, the second plate body 522 is sealingly connected with the pressure applying member 20, and the connecting plate body 523 is sealingly connected with the outer surface of the hatch seal 2. In this way, the flexible sealing member 51 can completely separate the gap between the pressure applying member 20 and the hatch seal 2 from other gaps, so as to ensure that the fluid leakage channel only exists between the pressure applying member 20 and the hatch seal 2.

[0087] Further, as shown in Figures 1-3 The first plate body 521 and the second plate body 522 are spaced apart along the left-right direction (i.e. the arrangement direction of the first chamber 101 and the second chamber 102); the first plate body 521 is an n-shaped plate, and three edges of the n-shaped plate are sealingly connected with the top wall, the front side wall and the rear side wall of the sealing box 10; the second plate body 522 is an n-shaped plate, and three edges of the n-shaped plate are sealingly connected with the upper edge, the front edge and the rear edge of the pressure applying member 20; the corresponding connecting plate body 523 includes three parts connected in sequence to connect the first n-shaped plate body 521 and the second n-shaped plate body 522 together, and the flexible sealing member 51 is generally formed in an n-shaped structure; and the front end lower edge and the rear end lower edge of the connecting plate body 523 are matched with the outer surface shape of the hatch sealing member 2, so that the front end lower edge is sealingly connected with the front end of the hatch sealing member 2, and the rear end lower edge is sealingly connected with the rear end of the hatch sealing member 2.

[0088] Thus, the gap between the pressure applying member 20 and the hatch sealing member 2 is located on the inner side of the n-shaped structure, the gap between the hatch sealing member 2 and the sealing box 10 and the gap between the pressure applying member 20 and the sealing box 10 are located on the outer side of the n-shaped structure, and it is ensured that the leakage channel only exists between the pressure applying member 20 and the hatch sealing member 2. The one-piece n-shaped structure of the flexible sealing member 51 is simple in structure, easy to assemble, and has better sealing effect.

[0089] In some embodiments, the height of the first plate body 521 is greater than the height of the second plate body 522, so that the connecting plate body 523 extends obliquely from the first plate body 521 to the second plate body 522. Thus, during the movement of the pressure applying member 20, the second plate body 522 can move with the pressure applying member 20, reducing the resistance of the flexible sealing member 51 to the movement of the pressure applying member 20, and providing a larger deformation amount for the pressure applying member 20.

[0090] The present application also proposes a sealing test method of the hatch sealing member 2, and the sealing test method according to the embodiments of the present application uses the water sealing test device 1 of the hatch sealing member 2 according to the embodiments of the present application.

[0091] Specifically, as shown in Figure 4 The sealing test method according to the embodiments of the present application can include:

[0092] S1: installing the hatch sealing member 2 to the installation position in the sealing box 10;

[0093] S2: adjusting the compression amount of the pressure applying member 20 to the hatch sealing member 2;

[0094] S3: injecting a certain amount of liquid into the first chamber 101, and controlling the pressure in the first chamber 101 through the first pressure control assembly 30;

[0095] S4: controlling the pressure in the second chamber 102 by the second pressure control component 40;

[0096] S5: detecting the leakage of the cabin door seal 2 after the pressures in the first chamber 101 and the second chamber 102 are stabilized.

[0097] By adjusting the compression amount of the pressure applying component 20 to the cabin door seal 2, the leakage under different compression amounts can be measured; by controlling the pressure in the first chamber 101 by the first pressure control component 30, the liquid pressure in the first chamber 101 can be changed, thereby simulating the working conditions under different water entry depths; by controlling the pressure in the second chamber 102 by the second pressure control component 40, the gas pressure in the second chamber 102 can be changed, thereby simulating the working conditions under different pressures in the cabin.

[0098] Therefore, by changing the pressure in the first chamber 101, the pressure in the second chamber 102, and the compression amount of the cabin door seal 2, the leakage process of the aircraft cabin door after entering the water under different compression amounts can be continuously measured, effectively avoiding multiple clamping during measurement under different compression amounts, having the characteristics of high measurement efficiency, comprehensive simulation of aircraft water entry conditions, low operation difficulty, and low cost, and greatly facilitating the design of the cabin door seal 2 and components cooperating with the cabin door seal 2 (such as the pressure applying component 20 which can simulate the seal pressure head cooperating with the cabin door seal 2).

[0099] It should be noted that the numbering of the above steps S1-S5 is not a limitation on the operation sequence, but only for clearer description of each operation procedure. For example, step S3 can be performed before step S2, or step S2 can be performed before step S3; for example, step S3 and step S4 can be performed simultaneously or sequentially; for example, after step S5 is performed, step S2 can be performed again to continue detecting the leakage under another compression amount.

[0100] In addition, it should be noted that there are many methods for detecting the leakage of the cabin door seal 2, such as observing or measuring the liquid depth or pressure in the second chamber 102, observing or measuring the depth or pressure of the remaining liquid in the first chamber 101, calculating the leakage rate, calculating the sample leakage rate, etc.

[0101] In some embodiments, detecting the leakage of the cabin door seal 2 in step S5 can specifically include: calculating the leakage rate of the cabin door seal 2 according to the formula L*R=Q / (△P*L),△P=P1-P2. Wherein, L is the effective length of the cabin door seal 2; R is the leakage rate of the cabin door seal 2; Q is the liquid flow rate leaked into the second chamber 102; P1 is the liquid pressure in the first chamber 101; P2 is the liquid pressure in the second chamber 102.

[0102] For example, L is the length of the part of the hatch seal 2 actually corresponding to the leakage passage, such as in the embodiment comprising the flexible seal 51, L is the length of the hatch seal 2 located in the n-shaped structure of the flexible seal 51, i.e. the length located between the front end and the rear end of the flexible seal 51.

[0103] In the embodiment in which the second pressure control assembly 40 comprises the second flow meter 45, Q is the value of the second flow meter 45, which can be, for example, the average value of the values of the second flow meter 45 continuously read after the pressure is stabilized to reduce detection errors. It should be noted that after the liquid in the first chamber 101 leaks into the second chamber 102, it flows through the second connecting pipe 42 and flows to the second tank 41, so the value of the second flow meter 45 is the amount of liquid leaked from the first chamber 101 to the second chamber 102.

[0104] P1 can be the value of the first pressure sensor 34 of the first pressure control assembly 30, and P2 can be the value of the second pressure sensor 44 of the second pressure control assembly 40.

[0105] The above formula combines the effective length of the hatch seal 2, the amount of liquid leakage, and the liquid pressure in the first chamber 101 and the second chamber 102 to evaluate the leakage condition, which parameterizes and accurately evaluates the leakage condition, and is beneficial to provide a basis for the design of the hatch seal 2 and the sealing head.

[0106] In some embodiments, as shown in FIG. 1, the first pressure control assembly 30 comprises a first tank 31 connected to the first chamber 101. Step S3 injects a certain amount of liquid into the first chamber 101 and controls the pressure in the first chamber 101 through the first pressure control assembly 30, which can specifically include: Figure 1

[0107] Step S31: introduce half the amount of liquid into the first tank 31;

[0108] Step S32: introduce gas into the first tank 31 to adjust the liquid pressure in the first chamber 101 according to the target hatch water entry depth.

[0109] Here, the target hatch water entry depth refers to the required simulated water entry depth, and different target hatch water entry depths correspond to different liquid pressures in the first chamber 101, and different liquid pressures in the first chamber 101 correspond to different amounts of gas introduced into the first tank 31. The target hatch water entry depth can be a continuously changing water entry depth interval, or one or more water entry depth values.

[0110] ​The amount of liquid input is generally half of the volume of the first tank 31, so that the subsequent input of gas into the first tank 31 can adjust the gas pressure in the first tank 31, and in turn adjust the liquid pressure in the first chamber 101, simulating different water entry depths. By adjusting the liquid pressure by inputting gas into the first tank 31, the stability of the liquid pressure adjustment is improved, and in turn the accuracy of the leakage detection is improved.

[0111] In some embodiments, as shown in Figure 1 The second pressure control assembly 40 includes a second tank 41 connected to the second chamber 102. Step S4 controls the pressure in the second chamber 102 through the second pressure control assembly 40, which can specifically include:

[0112] According to the target cabin air pressure, gas is input into the second tank 41 to adjust the gas pressure in the second chamber 102.

[0113] To improve passenger comfort, the cabin is usually filled with air pressure. Here, the target cabin air pressure is the desired simulated cabin air pressure, so that the air pressure in the second chamber 102 is consistent with the actual air pressure, which helps improve the accuracy of the leakage detection.

[0114] The water sealing test device 1 and the sealing test method of the hatch seal 2 according to one specific embodiment of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the following description is only exemplary and should not be construed as limiting the invention.

[0115] According to some specific embodiments of the present application, as shown in Figures 1-3 The water sealing test device 1 is used for water entry sealing detection of the hatch seal 2, which is an aviation fabric rubber hatch seal. The water sealing test device 1 includes a first pressure control assembly 30, a second pressure control assembly 40, a sealing box 10, a pressure applying member 20 and a flexible sealing structure 50.

[0116] The first pressure control assembly 30 is a high-pressure side water pressure control assembly, which includes a first air inlet valve 33, a first tank 31, a first connecting pipe 32, a first pressure sensor 34 and a first flow meter 35. The first air inlet valve 33 can input compressed air into the first tank 31 to generate stable water pressure. Moreover, the first pressure control assembly 30 can receive signals from the first pressure sensor 34 to close-loop control the water pressure, and accurately measure the amount of water flowing into the first chamber 101 through the first flow meter 35.

[0117] The pressure-applying component 20 includes a pressure-applying section 21 and an adjusting section 22. The pressure-applying component 20 and the door seal 2 divide the space inside the sealing housing 10 into a first chamber 101 and a second chamber 102 located on both sides of the door seal 2. The first chamber 101 is a high-pressure chamber, and the second chamber 102 is a low-pressure chamber. The first chamber 101 is equipped with a first pressure sensor 34, and the second chamber 102 is equipped with a second pressure sensor 44, which can accurately measure the fluid pressure on both sides of the door seal 2 and feed it back to the first pressure control component 30 and the second pressure control component 40. The adjusting section 22 is a telescopic screw, which can continuously adjust the compression amount of the door seal 2 by the pressure-applying component 21. The sealing housing 10 is equipped with a mounting base 11, and the door seal 2 is fixed to the mounting base 11. The mounting base 11 can provide the door seal 2 with an installation and fixing method consistent with the aircraft door.

[0118] The second pressure control component 40 is a low-pressure side water pressure control component, including a second air inlet valve 43, a second tank 41, a second connecting pipe 42, a second pressure sensor 44, and a second flow meter 45. Compressed air is introduced into the second tank 41 through the second air inlet valve 43 to generate stable pressure. The second pressure control component 40 can receive signals from the second pressure sensor 44 to regulate the water pressure in a closed loop, and accurately measure the amount of water flowing into the second chamber 102 through the second flow meter 45.

[0119] The flexible sealing structure 50 includes two flexible sealing elements 51, which are respectively disposed on both sides of the hatch seal 2. The flexible sealing elements 51 can move up and down with the pressure application element 20. While changing the compression amount of the pressure application element 20 on the hatch seal 2, the sealing between the hatch seal 2 and the two sides of the sealing box 10, as well as between the pressure application element 20 and the sealing box 10, is maintained, ensuring that the leakage channel exists only between the hatch seal 2 and the pressure application element 20.

[0120] like Figure 4 and Figure 5 As shown, the sealing test method for hatch seal 2 includes the following steps:

[0121] (1) Install the hatch seal 2 on the mounting seat 11 of the sealed housing 10;

[0122] (2) Use a waterproof adhesive to bond the flexible seal 51 to the inner surface of the sealing box 10;

[0123] (3) Cover the sealed box 10 with the box cover 122 to seal the installation space of the sealed box 10;

[0124] (4) Adjust the compression of the hatch seal 2 by applying pressure 20;

[0125] (5) Half the volume of water is introduced into the first tank 31, and the pressure in the first tank 31 is set by the first pressure control component 30;

[0126] (6) The pressure in the second tank 41 is set by the second pressure control component 40 to simulate the state under the actual pressure in the cabin of the airplane;

[0127] (7) After the pressure on both sides of the cabin door seal 2 is stabilized, the values of the first flow meter 35 are continuously read and averaged, and the values of the second flow meter 45 are continuously read and averaged;

[0128] (8) The leakage rate of the cabin door seal 2 is calculated according to the formula L*R=Q / (△P*L), and △P=P1-P2;

[0129] (9) After step (8), at least one of steps (4), (5), and (6) is returned to be executed, and the leakage rate of the cabin door seal 2 is calculated again after the pressure is stabilized.

[0130] In the above embodiment, the pressure in the first tank 31 is adjusted by the first pressure control component 30 to simulate the water pressure when the cabin door of the airplane enters water at different depths, the pressure in the second tank 41 is adjusted by the second pressure control component 40 to simulate the state under different pressures in the cabin of the airplane, and the degree of extrusion of the cabin door seal 2 is adjusted by the movement of the pressure applying member 20 to simulate the state under different compression amounts of the cabin door seal 2. Thus, the leakage process of the cabin door of the airplane after entering water under different compression amounts and different working conditions can be continuously measured, and multiple clamping during testing is effectively avoided, and the testing efficiency is high and the simulation of the water entry working condition of the airplane is comprehensive.

[0131] Other configurations and operations of the water sealing test device 1 according to the embodiment of the present application are known to those skilled in the art, and will not be described in detail here.

[0132] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "linking" should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0133] In the description of the present application, the description of the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0134] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application will be defined with respect to the claims and their equivalents.

Claims

1. A water seal test device for a hatch seal, characterized by, The device comprises: a sealed box body having a mounting position for mounting a hatch seal inside; a pressure applying member movably mounted on the sealed box body, and used for being in mutual extrusion contact with the hatch seal and separating a space inside the sealed box body into a first chamber and a second chamber, the pressure applying member being moved for adjusting the compression amount of the hatch seal; a first pressure control assembly connected with the first chamber and used for controlling the pressure of the first chamber, the first pressure control assembly comprising a first flow meter used for detecting the liquid flow into the first chamber; a second pressure control assembly connected with the second chamber and used for controlling the pressure of the second chamber, and further comprising: a flexible sealing structure sealing the gap between the hatch seal and the sealed box body, and sealing the gap between the pressure applying member and the sealed box body; the pressure applying member and the sealed box body are adhesively sealed with the flexible sealing structure, and the flexible sealing structure is adhesively sealed with the hatch seal, the flexible sealing structure comprising two flexible sealing members respectively located in the first chamber and the second chamber, the flexible sealing member comprising a first plate body, a second plate body and a connecting plate body, the connecting plate body connecting the first plate body and the second plate body, the first plate body being sealingly connected with the inner wall of the sealed box body, the second plate body being sealingly connected with the pressure applying member, and the connecting plate body being sealingly connected with the outer surface of the hatch seal, the height of the first plate body being greater than the height of the second plate body.

2. The water-tight test device for a hatch seal according to claim 1, wherein, The pressure applying member comprises a pressure applying part and an adjusting part, the adjusting part being threadedly connected with the sealed box body, and the pressure applying part being located on the side of the adjusting part close to the mounting position and used for extruding the hatch seal.

3. The water-tight test device for a hatch seal according to claim 2, wherein, The sealed box body comprises a box body and a mounting rack mounted on the box body, the box body having the mounting position inside, the pressure applying part penetrating through the box body, and the adjusting part being located outside the box body and threadedly connected with the mounting rack.

4. The water-tight test device for a hatch seal as defined in claim 1, wherein, The first pressure control assembly comprises a first tank body, a first connecting pipe and a first air inlet valve, the first connecting pipe connecting the lower opening of the first tank body and the first chamber, and the first air inlet valve being arranged at the upper opening of the first tank body.

5. The water sealing test device for the hatch seal according to claim 4, wherein the first pressure control assembly comprises a first pressure sensor arranged in the first chamber and used for detecting the fluid pressure in the first chamber, and the first flow meter is arranged in the first connecting pipe and used for detecting the liquid flow into the first chamber.

6. The water-tight test device for a hatch seal as defined in claim 1, wherein, The second pressure control assembly comprises a second tank body, a second connecting pipe and a second air inlet valve, the second connecting pipe connecting the lower opening of the second tank body and the second chamber, and the second air inlet valve being arranged at the upper opening of the second tank body.

7. The water sealing test device for the hatch seal according to claim 6, wherein The second pressure control assembly comprises a second pressure sensor arranged in the second chamber and configured to detect the fluid pressure in the second chamber; and / or, The second pressure control assembly comprises a second flow meter arranged in the second connecting pipe and configured to detect the liquid flow leaked into the second chamber.

8. A method of seal testing a hatch seal, characterized by, The water leakage test device using the hatch seal according to any one of claims 1-7, the sealing test method comprising: installing the hatch seal into the installation position in the sealing box; adjusting the compression amount of the compression member on the hatch seal; injecting a certain amount of liquid into the first chamber and controlling the pressure in the first chamber by the first pressure control assembly; controlling the pressure in the second chamber by the second pressure control assembly; after the pressures in the first chamber and the second chamber are stabilized, detecting the leakage of the hatch seal.

9. The method of sealing testing of a hatch seal according to claim 8, characterized in that, The detection of the leakage of the hatch seal comprises: calculating the leakage rate of the hatch seal according to the formula L*R=Q / (△P*L),△P=P1-P2, wherein, L is the effective length of the hatch seal; R is the leakage rate of the hatch seal; Q is the liquid flow leaked into the second chamber; P1 is the liquid pressure in the first chamber; P2 is the liquid pressure in the second chamber.

10. The method of seal testing of a hatch seal as claimed in claim 8, wherein, The first pressure control assembly comprises a first tank connected to the first chamber, and the injection of a certain amount of liquid into the first chamber and the control of the pressure in the first chamber by the first pressure control assembly comprises: injecting half of the liquid amount into the first tank; injecting gas into the first tank according to the target hatch water depth to adjust the liquid pressure in the first chamber.

11. The method of seal testing of a hatch seal as claimed in claim 8, wherein, The second pressure control assembly comprises a second tank connected to the second chamber, and the control of the pressure in the second chamber by the second pressure control assembly comprises: injecting gas into the second tank according to the target cabin air pressure to adjust the air pressure in the second chamber.

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