Testing device for verifying instantaneous damage safety of windshield glass

Abstract

The utility model discloses a testing device for verifying the instantaneous damage safety of windshield glass, relates to the technical field of aircraft windshield glass, and solves the problem that the conventional damage safety testing device can not only meet the pressurization requirement of the windshield glass but also give consideration to the safety of testing personnel. And the instantaneous damage examination of the windshield glass is difficult to realize. Comprising a pressurization cavity and a damage control device, a test piece installation port is formed in one side of the pressurization cavity, a windshield test piece is connected to the test piece installation port in a sealed mode, a plurality of cavity function holes are formed in the periphery of the pressurization cavity, and internal pressurization and / or pressure relief and / or pressure monitoring are / is conducted on the pressurization cavity through the cavity function holes; the damage control device is located on the outer side of the windshield test piece and carries out instantaneous impact work on the windshield test piece. According to the invention, safety verification under the condition of instantaneous damage of the windshield can be realized, and the effect of safety verification under the condition of instantaneous damage of the windshield is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft windshield glass, especially relates to a test device for verifying the instantaneous breakage safety of windshield glass. BACKGROUND

[0002] In the field of aviation, flight safety is always the top priority, and the safety of windshield glass, as an important protective and visual assurance component of the aircraft, cannot be ignored. Aircraft windshield glass not only has to withstand the aerodynamic pressure, temperature changes and other regular factors during flight, but also needs to resist sudden situations such as bird strikes and foreign object impacts. In some cases, the structural layer of the windshield glass may break instantaneously, which may lead to serious flight accidents. Therefore, the windshield glass of the aircraft usually has a breakage safety design requirement, that is, when the structural layer breaks suddenly, the remaining structure of the windshield glass should be sufficient to support the aircraft to return.

[0003] Therefore, during the design process of the windshield glass, the safety of the structure of the windshield glass after instantaneous breakage needs to be verified through testing means. Since there is a certain air pressure requirement inside the cabin during actual use of the windshield glass, the traditional breakage safety test device cannot simultaneously consider the safety of the test personnel, meet the pressurization requirements of the windshield glass, and achieve the requirements of the instantaneous breakage examination of the windshield glass. Therefore, there is an urgent need for a new test device to verify the safety of the windshield glass under instantaneous breakage conditions. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a test device for verifying the instantaneous breakage safety of windshield glass, which can verify the safety of the windshield glass under instantaneous breakage conditions, and at the same time, ensure the safety of the operator.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme:

[0006] A test device for verifying the instantaneous breakage safety of windshield glass, comprising a pressurized cavity and a breakage control device, a test piece mounting port is formed on one side of the pressurized cavity, a windshield test piece is sealingly connected at the test piece mounting port, a plurality of cavity function holes are provided on the outer periphery of the pressurized cavity, and the pressurized cavity is internally pressurized and / or depressurized and / or pressure monitored through the cavity function holes; the breakage control device is located outside the windshield test piece and performs instantaneous impact work on the windshield test piece.

[0007] Further, the breakage control device comprises a breakage control cylinder, and the output end of the breakage control cylinder is aligned with the windshield test piece.

[0008] Further, the output end of the breakage control cylinder is provided with a sharp impact head.

[0009] Further, the output end of the breakage control cylinder is provided with a drill bit.

[0010] Further, the breakage control device is installed on a device connecting support connected to the plenum.

[0011] Further, the plenum comprises a through hole away from the test piece installation port side and a cavity bottom connecting plate at the through hole position, and the cavity bottom connecting plate is sealingly connected to the plenum.

[0012] Further, the windscreen test piece is connected to the test piece installation port through a fastener.

[0013] Further, the test piece installation port is sealed by the windscreen test piece body, or a sealant layer is arranged between the two to achieve sealing.

[0014] In summary, the utility model has the following beneficial effects:

[0015] The plenum and the breakage control device are arranged, the test piece installation port is arranged on one side of the plenum to connect the windscreen test piece and the breakage control device, the internal pressure of the plenum is increased, or the pressure is released, or the pressure is monitored through the cavity function hole, the breakage control device is arranged and located outside the windscreen test piece and performs instantaneous impact work on the windscreen test piece, the breakage control device is remotely controlled and started, the safety verification of the windscreen instantaneous breakage is realized, and the safety of the operator is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Figure 1 It is a structure schematic view of a test device for verifying the instantaneous breakage safety of the windscreen.

[0018] In the figure, 1, plenum; 1-1, cavity function hole; 1-2, test piece installation port; 2, cavity bottom connecting plate; 3, device connecting support; 4, breakage control cylinder; 5, breakage control circuit; 6, windscreen test piece. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model will be further described below in combination with the drawings, and the embodiments do not constitute a limitation on the utility model. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0020] An experimental device for verifying the instantaneous breakage safety of a windscreen, as shown in the drawings, comprising a pressurized cavity 1 and a breakage control device, the pressurized cavity 1 comprising an experimental piece mounting port 1-2 opened on one side and a through hole on the other side, the experimental piece mounting port 1-2 being sealingly connected to a windscreen experimental piece 6, and the through hole being connected to a cavity bottom connecting plate 2, which is sealingly connected to the pressurized cavity 1. Figure 1

[0021] The windscreen experimental piece 6 is connected to the experimental piece mounting port 1-2 by a fastener, which can be a screw or the like structure, and the sealing performance between the windscreen experimental piece 6 and the experimental piece mounting port 1-2 is realized by the body of the windscreen experimental piece 6 or by a caulking sealant. Similarly, the cavity bottom connecting plate 2 can also be sealingly connected to the through hole position by a screw or the like fastener.

[0022] As shown in the drawings, the pressurized cavity 1 is provided with one or more cavity function holes 1-1 on the outer periphery, through which the internal pressure of the pressurized cavity 1 is increased, released, and monitored. Figure 1

[0023] The breakage control device is located outside the windscreen experimental piece 6 and performs instantaneous impact work on the windscreen experimental piece 6. Specifically, the breakage control device comprises a breakage control cylinder 4, the output end of which is aligned with the windscreen experimental piece 6, and the output end of the breakage control cylinder 4 can be connected to a sharp impact head such as a drill bit.

[0024] In this embodiment, the breakage control device is mounted on a device connecting bracket 3, which is connected to one side of the pressurized cavity 1 where the experimental piece mounting port 1-2 is provided by welding or fastener assembly or the like. The breakage control device can be detachably connected to the device connecting bracket 3 by a screw, so as to adjust the distance between the breakage control cylinder 4 and the windscreen experimental piece 6. The breakage control cylinder 4 is connected to a breakage control circuit 5 and connected to a control system through the breakage control circuit 5, so as to control the instantaneous impact of the drill bit or other sharp metal in the breakage control cylinder 4 on the windscreen experimental piece 6, thereby realizing the instantaneous breakage of the windscreen glass.

[0025] The movement stroke of the drill bit or other sharp metal in the breakage control cylinder 4 can be adjusted, so as to realize different degrees of windscreen breakage safety test according to different test requirements. The breakage control circuit 5 can be appropriately lengthened to ensure the safety of the operator.

[0026] ​​The embodiment sets the pressurizing cavity 1 and the breakage control device, opens the test piece mounting port 1-2 on one side of the pressurizing cavity 1 to connect the windscreen test piece 6 and the breakage control device, carries out internal pressurization, pressure relief or pressure monitoring to the pressurizing cavity 1 through the cavity function hole 1-1, sets the breakage control device and makes it located outside the windscreen test piece 6 and carries out instantaneous impact work to the windscreen test piece 6, so that the breakage control device can be remotely controlled and started, solves the problem that the traditional breakage safety test device is difficult to simultaneously consider the safety of test personnel, meet the pressurization requirements of the windscreen and realize the instantaneous breakage test requirements of the windscreen, verifies the safety of the windscreen under the condition of instantaneous breakage and ensures the safety of the operator.

[0027] The embodiment also discloses a test method for verifying the instantaneous breakage safety of the windscreen, which comprises the following steps.

[0028] Step S1, according to the actual technical state requirements, the pressurizing cavity 1 is gradually punched to make the internal pressure reach P1 = △Pt + △Pa, wherein △Pt is the maximum setting value of the release valve of the airplane, and △Pa is the aerodynamic negative pressure of the cabin of the airplane; the pressure tolerance needs to be a positive value to ensure complete test;

[0029] Step S2, the breakage control cylinder 4 is remotely controlled to act by the control system, the stroke of the breakage control device for breaking the glass is set according to the requirements of the breakage position of the windscreen to be verified, and the breakage control device is ensured to be accurately positioned to the breakage position of the windscreen, so that the instantaneous breakage of the windscreen test piece 6 is realized;

[0030] Step S3, the internal pressure of the pressurizing cavity 1 is compensated to make the internal pressure reach P2 = n x (△Pt + △Pa), wherein n is a load amplification coefficient and is determined according to the material of the windscreen glass; and the pressure is maintained, and the pressure maintaining time is determined according to the flight time of the verified product;

[0031] When a single breakage occurs in the structure layer of the windscreen glass, the material characteristics, material characteristic variation, performance degradation in service and influence of critical environment need to be considered, a load amplification coefficient needs to be used to cover the influence of these factors, that is, the pressure load of the breakage safety test is n x (△Pt + △Pa), wherein the amplification coefficient n is combined with the commonly used material of the windscreen glass, and the commonly used amplification coefficients are given, including:

[0032] For inorganic glass, the load amplification coefficient is 2.0; for tensile organic glass material, the load amplification coefficient is 2.0; for cast organic glass material, the load amplification coefficient is 4.0;

[0033] Step S4, the internal pressure of the pressurizing cavity 1 is monitored, the state of the test piece and the pressure maintaining condition after the test are analyzed and confirmed, and whether the test result meets the relevant technical requirements is determined.

[0034] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the technical scheme of the present application.

Claims

1. A test apparatus for verifying the safety of a windscreen against instantaneous breakage, characterized in that it comprises: The device comprises a plenum chamber (1) and a break control device, the plenum chamber (1) is provided with a test piece mounting port (1-2) on one side, the test piece mounting port (1-2) is sealingly connected with a wind deflector test piece (6), a plurality of chamber function holes (1-1) are arranged on the outer periphery of the plenum chamber (1), and the plenum chamber (1) is internally pressurized and / or depressurized and / or pressure monitored through the chamber function holes (1-1); the break control device is located outside the wind deflector test piece (6) and performs instantaneous impact work on the wind deflector test piece (6).

2. A test device for verifying the instantaneous breakage safety of a windscreen according to claim 1, characterized in that: The break control device comprises a break control cylinder (4), and the output end of the break control cylinder (4) is aligned with the wind deflector test piece (6).

3. A test apparatus for verifying the instantaneous breakage safety of a windscreen according to claim 2, characterized in that: The output end of the break control cylinder (4) is provided with a sharp impact head.

4. A test apparatus for verifying the instantaneous breakage safety of a windscreen according to claim 2, characterized in that: The output end of the break control cylinder (4) is provided with a drill bit.

5. A test device for verifying the instantaneous breakage safety of a windscreen according to claim 1 or 2, characterized in that: The break control device is mounted on a device connecting support (3), and the device connecting support (3) is connected to the outer side of the plenum chamber (1).

6. A test device for verifying the instantaneous breakage safety of a windscreen according to claim 1, characterized in that: The plenum chamber (1) comprises a through hole away from the side of the test piece mounting port (1-2) and a chamber bottom connecting plate (2) at the position of the through hole, and the chamber bottom connecting plate (2) is sealingly connected to the plenum chamber (1).

7. A test device for verifying the instantaneous breakage safety of a windscreen according to claim 1 or 6, characterized in that: The wind deflector test piece (6) is connected to the test piece mounting port (1-2) through a fastener.

8. A test device for verifying the instantaneous breakage safety of a windscreen according to claim 1 or 6, characterized in that: The test piece mounting port (1-2) is sealed by the body of the wind deflector test piece (6), or a sealant layer is arranged between the two to achieve sealing.

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