阅读说明：本技术 复合材料火焰蔓延测试装置及测试方法 (Composite material flame spread testing device and testing method ) 是由 陈元 于新华 谢飞 刘又瑞 于 2019-10-29 设计创作，主要内容包括：本发明涉及飞机测试技术领域,公开了一种复合材料火焰蔓延测试装置,包括支撑部、放置部和点火部；所述支撑部,用来支撑放置部；所述放置部,用来放置复合材料板,放置部与复合材料板之间形成供空气通过的缝隙；所述放置部通过调节与支撑部的连接位置调节放置部与复合材料板的倾斜角度；所述点火部,用来点燃放置部上放置的复合材料板。本发明还公开了一种复合材料火焰蔓延测试方法,能够模拟飞机真实场景更加精准地测试飞机上各种复合材料的火焰蔓延情况。(The invention relates to the technical field of airplane testing, and discloses a composite material flame spread testing device which comprises a supporting part, a placing part and an ignition part, wherein the supporting part is arranged on the placing part; the supporting part is used for supporting the placing part; the placing part is used for placing the composite material plate, and a gap for air to pass through is formed between the placing part and the composite material plate; the placing part adjusts the inclination angle of the placing part and the composite plate by adjusting the connecting position of the placing part and the supporting part; the ignition part is used for igniting the composite material plates placed on the placing part. The invention also discloses a composite material flame spread testing method, which can simulate the real scene of an airplane to more accurately test the flame spread condition of various composite materials on the airplane.)

1. The composite material flame spread testing device is characterized in that: comprises a supporting part, a placing part and an ignition part;

the supporting part is used for supporting the placing part;

the placing part is used for placing the composite material plate, and a gap for air to pass through is formed between the placing part and the composite material plate; the placing part adjusts the inclination angle of the placing part and the composite plate by adjusting the connecting position of the placing part and the supporting part;

the ignition part is used for igniting the composite material plates placed on the placing part.

2. The composite flame spread test apparatus of claim 1, wherein: the supporting part comprises a bottom frame and a support vertically connected with the bottom frame, and the support is located above the bottom frame.

3. The composite flame spread test apparatus of claim 2, wherein: the placing part comprises a movable frame detachably connected with the support, and the movable frame is arranged in an inclined mode.

4. The composite flame spread test apparatus of claim 3, wherein: the testing tray is connected in the movable frame in a clamping mode and comprises a bottom plate used for placing the composite material plate, and a plurality of thermocouples are arranged on the bottom surface of the bottom plate.

5. The composite flame spread test apparatus of claim 4, wherein: the test tray comprises two clamping grooves perpendicular to the bottom plate, and the test tray is connected with the movable frame through the clamping grooves.

6. The composite flame spread test apparatus of claim 5, wherein: and a mounting groove for placing the composite material plate is arranged between the opposite surfaces of the two clamping grooves, the mounting groove is parallel to the test disc, and a certain distance is reserved between the mounting groove and the top surface of the bottom plate of the test disc.

7. The composite flame spread test apparatus of claim 6, wherein: the distance between the mounting groove and the top surface of the bottom plate of the test tray is 2.54 centimeters.

8. The composite material flame spread test method is characterized by comprising the following steps: the method comprises the following steps:

step one, adjusting the inclination angle of a placing part;

placing the metal sheet into the placing part, and adjusting the height of the placing part to enable the metal sheet to be in contact with a fire source of the ignition part;

taking away the metal sheet, and placing the composite material plate in the adjusted placing part;

igniting the ignition part, and burning the composite material plate;

and step five, after the combustion is finished, taking down the composite material plate for testing.

9. The composite flame spread test method of claim 8, wherein: in the first step, the placing part is adjusted by adjusting the inclination angle of the movable frame.

10. The composite flame spread test method of claim 8, wherein: in the fourth step, when the composite board is burned, the flame is burned along the top surface of the composite board, and the flame is burned upward along the gap between the composite board and the placement portion.

Technical Field

The invention relates to the technical field of airplane testing, in particular to a composite material flame spread testing device and a testing method.

Background

Aircraft are important transportation vehicles. Non-metallic composite materials, including fuselage skin and structural components, are now increasing on aircraft fuselages, and the flammability assessment of these new non-metallic conforming materials is an important ring in aircraft qualification compared to traditional metallic materials. The impact of the fire flame propagation on these composites, in particular, is hidden, and is directly related to the safety of the aircraft in the use of these composites.

In an aircraft cabin, many tiny gaps often become a way to hide the fire flame from being generated and spread, and therefore, the actual environment of the aircraft cabin needs to be simulated to test the external heat loss of the composite material for flame propagation within the panel.

Disclosure of Invention

The invention aims to provide a composite material flame spread testing device which is used for simulating the real environment of an airplane to test the external heat loss and the internal flame propagation condition of the composite material.

The basic scheme provided by the invention is as follows: the composite material flame spread testing device comprises a supporting part, a placing part and an ignition part;

the supporting part is used for supporting the placing part;

the placing part is used for placing the composite material plate, and a gap for air to pass through is formed between the placing part and the composite material plate; the placing part adjusts the inclination angle of the placing part and the composite plate by adjusting the connecting position of the placing part and the supporting part;

the ignition part is used for igniting the composite material plates placed on the placing part.

The basic scheme has the working principle and the beneficial effects that:

this scheme places the combined material board that combined material made through the portion of placing, can find the angle that is favorable to testing flame to spread through the inclination of adjusting combined material board, simulates the environment when the aircraft is on fire as far as really possible. Meanwhile, a gap formed between the placing part and the composite plate simulates an area which cannot enter the aircraft cabin, so that the hidden flame spreading condition can be conveniently tested.

The scheme can effectively simulate the real situation of the airplane to test the external heat loss and the internal flame propagation situation of the composite material.

The inclination angle range of the placing part and the composite plate is 0-80 degrees, namely the included angle range of the placing part and the horizontal plane or the composite plate and the horizontal plane is 0-80 degrees. Therefore, the simulation of the structure which is arranged in any inclination is facilitated, and the flame spread test of the composite material which forms the corresponding structure is conveniently and truly carried out.

Further, the supporting part comprises a bottom frame and a bracket vertically connected with the bottom frame, and the bracket is positioned above the bottom frame.

The supporting part is placed on the ground through the bottom frame, and the supporting part is connected with the placing part through the supporting frame.

Further, the placing part comprises a movable frame detachably connected with the support, and the movable frame is arranged in an inclined mode.

When the ignition test is carried out, the movable frame is connected with the support, and after the test is finished, the movable frame and the support are detached. The movable frame is obliquely arranged, so that flame of the ignition part can spread upwards along the oblique direction conveniently.

Furthermore, a test tray is clamped in the movable frame and comprises a bottom plate for placing the composite material plate, and a plurality of thermocouples are arranged on the bottom surface of the bottom plate.

Through the thermocouple that sets up on the bottom plate, the temperature of the combined material board of placing on the test bottom plate can be come indirect test through the temperature of test bottom plate, and then the burning condition of test combined material board.

Furthermore, the test tray comprises two clamping grooves perpendicular to the bottom plate, and the test tray is connected with the movable frame through the clamping grooves.

Through the draw-in groove, make test tray and movable frame be connected, make the bottom plate of test tray parallel with movable frame, make the bottom plate of test tray and the same slope setting of movable frame, and then make the combined material board of placing on the bottom plate also slope and place.

Further, a mounting groove for placing the composite material plate is arranged between the opposite surfaces of the two clamping grooves, the mounting groove is parallel to the test disc, and a certain distance is reserved between the mounting groove and the top surface of the bottom plate of the test disc.

The distance between the mounting groove and the top surface of the bottom plate of the test tray is the width of a gap formed between the composite plate and the bottom plate of the test tray.

The mounting groove in-connection has the stopper, can adjust the gap width between combined material board and the experimental dish through the stopper. The width of this gap ranges from 1.53 cm to 4.58 cm.

Further, the distance between the mounting groove and the top surface of the bottom plate of the test tray is 2.54 centimeters.

After the composite plate is placed on the test disc, the width of a gap between the composite plate and the test disc is 2.54 cm, so that a hidden space in a cabin can be conveniently simulated, and a flame spread test can be carried out.

Still install the heat insulating board in the mounting groove, the heat insulating board is laminated with combined material board, and be located combined material board's top surface, combined material board is between heat insulating board and test panel bottom plate promptly, a thermal-protective coating for simulating on the aircraft, to combined material's flame spread in this direction play the effect of blockking, the effect of thermal-protective coating in the real aircraft of simulation, the flame that makes combined material board meet behind the heat insulating board spreads the condition more really, the test result is more accurate, be favorable to obtaining test results such as more accurate flame spread rate and combined material board temperature distribution condition through the experiment.

It is same, can also install soundproof cotton in the mounting groove, soundproof cotton and the laminating of combined material board, and be located combined material board's top surface, combined material board is between soundproof cotton and test panel bottom plate promptly, be used for simulating the puigging on the aircraft, to combined material's flame spread in this direction play the effect of blockking, simulate real aircraft in the effect of puigging, make the combined material board flame after meetting soundproof cotton spread the condition more true, the test result is more accurate, be favorable to obtaining test results such as more accurate flame spread speed and combined material board temperature distribution condition through the experiment.

The invention also provides a composite material flame spread testing method, which comprises the following steps:

step one, adjusting the inclination angle of a placing part;

placing the metal sheet into the placing part, and adjusting the height of the placing part to enable the metal sheet to be in contact with a fire source of the ignition part;

taking away the metal sheet, and placing the composite material plate in the adjusted placing part;

igniting the ignition part, and burning the composite material plate;

and step five, after the combustion is finished, taking down the composite material plate for testing.

The method has the advantages that;

the flame spread testing device made of the composite material can complete simulation of an airplane scene through simple operation, and is simple and convenient in operation steps.

Further, in the first step, the placing part is adjusted by adjusting the inclination angle of the movable frame.

The movable frame is the basic structure of whole portion of placing, adjusts the inclination of movable frame, just can adjust the angle of placing composite board in the portion of placing.

Further, in the fourth step, when the composite board is burned, the flame is burned along the top surface of the composite board, and at the same time, the flame is burned upward along the gap between the composite board and the placement portion.

When the composite board is directly burnt through open fire, the flame combustion is hidden in a narrow space of a simulated aircraft cabin through a gap, the combustion of two different conditions of the top surface and the bottom surface of the composite board is hidden, and the flame spread test on the composite board is conveniently simulated under the actual condition.

Drawings

FIG. 1 is a schematic structural diagram of a composite flame spread testing apparatus according to a first embodiment of the present invention.

Fig. 2 is another view of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the test plate 11, the support 12, the connecting piece 13, the bottom frame 14, the reinforcing plate 15, the movable frame 16, the foam block fire source 21 and the thermocouple 31.