Durability test device for a water drainage flap, and test method using the durability test device for a water drainage flap

Abstract

The present invention provides a durability test device for a drain flap, which is used for testing the durability of a drain flap, the drain flap being composed of a flap column, a drain plate provided in the flap column, and a drain rotation shaft connected to the drain plate, the durability test device for the drain flap includes a vibration table for applying vertical reciprocating vibration, and a water inlet flange disk fixed to the vibration table for supplying water to the drain flap, the water inlet flange disk includes a base fixed to the vibration table, and a water inlet column provided on the side of the base facing the drain flap, the water inlet column has a water inlet, the water inlet column and the flap column surround a water intake chamber, and the water inlet communicates with the water intake chamber. The durability test device for the drain flap of the present invention has a simple structure, can place the drain flap in a more realistic environment, has low test costs, can continuously apply a load force, and has more accurate measurement results.

Description

Technical Field

[0001] The present invention relates to a durability test apparatus for a drain flap and a test method using the durability test apparatus for a drain flap.

Background Art

[0002] An aircraft drain flap is an actuator for draining water provided on the hatch door of an aircraft. In the daily use of the hatch door of an aircraft, when encountering rain during flight, if the hatch door is opened or the seal strip of the hatch door is aged, rainwater may enter the cabin from the hatch door. Therefore, measures for draining the water accumulated in the cabin are necessary. When the water in the water storage chamber of the aircraft reaches a certain amount, the automatic mode of the aircraft drain flap is activated. After receiving the angular position indication signal transmitted from the pressure control device, the drain flap changes the flow passage area of the aircraft, thereby changing the water discharge flow rate of the hatch door and realizing the water discharge function in the cabin. When the automatic mode is invalid, the crew manually controls the rotating shaft of the drain flap via the panel, and changes the flow passage area of the aircraft drain flap to change the water discharge flow rate of the water storage chamber.

[0003] Due to the special environment encountered during the flight of the aircraft, it is necessary to frequently rotate the flap blade of the aircraft drain flap. The durability test of the aircraft drain flap is an important part of the reliability test of the aircraft. Currently, the conventional durability test of the drain flap can be performed by simulating the random vibration of the aircraft using an electric vibration table. During the test, the vibration is transmitted to the aircraft drain flap via the equipment, and a certain load is applied to the other end to simulate the water pressure of the drain flap. However, such a test can only reproduce a general environment. When the flap blade rotates obliquely, the force loading device cannot continuously apply force, and as a result, the test becomes discontinuous. That is, the generally used durability test apparatus for the aircraft drain flap cannot completely simulate the actual environment and is not suitable as a method for continuously testing the durability of the drain flap.

[0004] In view of the above points, in order to solve the above problems, it is necessary to improve the existing durability test device for drainage flaps.

Summary of the Invention

[0005] An object of the present invention is to provide a durability test device for drainage flaps to solve the problem that the existing test device cannot continuously apply a load force.

[0006] To achieve the above object, the present invention provides a durability test device for drainage flaps for testing the durability of drainage flaps. The drainage flap includes a flap column, a drainage plate provided in the flap column, and a drainage rotary shaft connected to the drainage plate. It is provided with a vibration table that gives vertical reciprocating vibration, and a water inlet flange disk fixed to the vibration table for supplying water to the drainage flap. The water inlet flange disk includes a base fixed to the vibration table and a water inlet column provided on the side of the base facing the drainage flap. A water inlet is opened in the water inlet column, and the water inlet column and the flap column surround a water absorption chamber, and the water inlet communicates with the water absorption chamber.

[0007] As a further improvement of the present invention, an overflow port communicating with the water absorption chamber is opened in the water inlet column.

[0008] As a further improvement of the present invention, the water inlet flange disk includes an overflow valve connected to the overflow port.

[0009] As a further improvement of the present invention, the drainage flap further includes a drainage control device connected to the drainage rotary shaft. The drainage control device is used to control the drainage rotary shaft to rotate the drainage plate, and the drainage control device is fixed to the flap column and the water inlet flange disk.

[0010] As a further improvement of the present invention, the water inlet flange disk further includes a fixed block fixed to the base and a lug fixedly connected to the fixed block, and the water drainage control device is fixedly connected to the lug.

[0011] As a further improvement of the present invention, the durability test device of the water drainage flap further includes a water discharge column provided on the side of the water drainage flap away from the water inlet flange disk, the water discharge column and the flap column surround a water discharge chamber, and the water drainage plate is provided between the water discharge chamber and the water absorption chamber.

[0012] As a further improvement of the present invention, a water discharge port is opened in the water discharge column.

[0013] As a further improvement of the present invention, the water drainage control device further includes a pressure sensor, and the pressure sensor is used to detect the water pressure in the water absorption chamber.

[0014] As a further improvement of the present invention, the durability test device of the water drainage flap further includes a high-pressure water tank, the high-pressure water tank communicates with the water inlet, and the high-pressure water tank is provided with a pressure adjustment device for controlling the water pressure entering the water absorption chamber.

[0015] The present invention further provides a test method using the durability test device of the water drainage flap, and the test method using the durability test device of the water drainage flap is as follows: S1: Starting the vibration table to simulate the influence of vibration on the water drainage operation during operation; S2: Supplying water into the water absorption chamber by the high-pressure water tank to simulate the working environment of the water drainage flap, and adjusting the water pressure by the pressure adjustment device to simulate different working conditions; S3: Detect the water pressure in the water absorption chamber by the pressure sensor. When the pressure in the water absorption chamber exceeds the set value, activate the overflow valve to reduce the water pressure in the water absorption chamber. When the pressure in the water absorption chamber does not exceed the set value, control the water drainage rotating shaft by the water drainage control device to rotate the water drainage plate, control different water drainage angles, allow the discharged water to enter the water discharge chamber, and discharge it from the water discharge port. This step is included.

Advantages of the Invention

[0016] The present invention has the following beneficial effects. The durability test device for the water drainage flap of the present invention has a simple structure, can install the water drainage flap in a more realistic environment, has a low test cost, can continuously apply a load force, and has a more accurate measurement result.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0018] Hereinafter, the solution means of the present invention will be clearly and completely described in combination with the drawings of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative labor are included in the protection scope of the present invention.

[0019] In the description of the present invention, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is the orientation or positional relationship based on the drawings, and is only used for the description of the present invention and the simplification of the description. It does not indicate or imply that such a device or element must have a specific orientation and be configured or operated in a specific orientation, so it cannot be understood as a limitation of the present invention. Also, the terms "first", "second", "third", etc. are only used for the purpose of description and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected" should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or there may be internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations. Furthermore, the technical features related to different embodiments of the present invention described below can be combined as long as they do not conflict with each other.

[0021] As shown in FIGS. 1 to 5, the durability test device 100 of the drain flap of the present invention is used to test the durability of the drain flap 200.

[0022] As shown in Fig. 1, the drain flap 200 includes a flap post 201, a drain plate 202 provided inside the flap post 201, a drain rotating shaft 203 connected to the drain plate 202, and a drain control device 204 connected to the drain rotating shaft 203. The drain control device 204 can control the rotation angle of the drain plate 202 by controlling the drain rotating shaft 203 to rotate the drain plate 202, and further control the drain amount by controlling the flow path area. In this embodiment, the rotation angle of the drain rotating shaft 203 is 0 to 45°, and the drain control device 204 is fixedly connected to the flap post 201.

[0023] The drain control device 204 includes a pressure sensor and a pressure regulating device.

[0024] As shown in Figs. 2 and 3, the durability test device 100 for the drain flap includes a vibration table 1 that gives vertical reciprocating vibration, a water inlet flange disk 2 fixed to the vibration table 1 for supplying water to the drain flap 200, a water discharge post 3 provided on the side of the drain flap 200 away from the water inlet flange disk 2, a high-pressure water tank, a return water tank, and a control unit.

[0025] The vibration table 1 is an electric vibration table and includes a driving device, an external power amplifier, a control device, a table body 11, and a vibration output table surface 12. The vibration output table surface 12 is fixedly connected to the water inlet flange disk 2.

[0026] During operation, the vibration table 1 drives the vibration output table surface 12 of the vibration table 1 to reciprocate through the driving device. The movement can be random or in the form of a sine curve under the control of the control device so as to simulate the irregular vibration during the flight of the aircraft. In this embodiment, before the durability test device 100 for the drain flap works, the table body 11 of the vibration table 1 is attached to the anchor bolts on the ground of the factory through nuts so that the vibration table 1 can operate stably. The vibration effect on the drain flap 200 during the flight of the aircraft can be simulated by the movement given by the vibration table 1.

[0027] As shown in FIG. 4, the water inlet flange disk 2 includes a base 21 fixed to the vibration table 1, a water inlet column 22 provided on the side of the base 21 facing the drain flap 200 of the base 21, an overflow valve, a fixed block 23 fixed to the base 21, and a lug 24 fixedly connected to the fixed block 23.

[0028] Furthermore, a countersunk hole 211 is formed in the base 21 so as to be fixedly connected to the vibration output table surface 12 of the vibration table 1 via a screw.

[0029] A water inlet 221 communicating with the water absorption chamber and an overflow port 222 communicating with the water absorption chamber are formed in the water inlet column 22, and the overflow port 222 is provided on the side facing the water inlet 221.

[0030] The water inlet 221 communicates with the high-pressure water tank. In this embodiment, the water inlet column 22 and the flap column 201 surround the water absorption chamber, and the water inlet 221 communicates with the water absorption chamber. The water in the high-pressure water tank flows into the water absorption chamber through the water inlet 221. In this embodiment, a tapered structure is provided on the side of the water inlet column 22 facing the drain flap 200, and a tapered structure is also provided on the side of the flap column 201 of the drain flap 200 facing the water inlet flange disk 2 of the water inlet flange disk 2. Both are fixed by a clamp collar to prevent loosening and water leakage.

[0031] The pressure sensor is used to detect the water pressure in the water absorption chamber. The pressure regulating device is used to control the water pressure of the water entering the water absorption chamber from the high-pressure water tank.

[0032] The overflow valve is connected to the overflow port 222. When the water pressure in the water absorption chamber is greater than the set value, the overflow valve opens to discharge the water in the water absorption chamber to reduce the water pressure in the water absorption chamber and prevent the destruction of the structure due to excessive water pressure. Furthermore, the overflow valve communicates with the high-pressure water tank via a high-pressure water pipe, and the overflow water can be introduced into the high-pressure water tank for reuse.

[0033] In this embodiment, the fixed block 23 is welded to the base 21, a mounting groove 231 is formed in the fixed block 23, and the lug 24 is mounted in the mounting groove 231. In this embodiment, the lug 24 can be designed according to different models of the drain flap 200 so as to meet the design requirements of more models of the drain flap 200.

[0034] In this embodiment, the water inlet flange disk 2 is fixed to the drain device, and further, the drain control device 204 is fixedly connected to the lug 24 via a screw.

[0035] As shown in FIG. 5, the water discharge column 3 and the flap column 201 surround the water discharge chamber, and the drain plate 202 is disposed between the water discharge chamber and the water absorption chamber.

[0036] A water discharge port 31 is formed in the water discharge column 3. The water discharge port 31 communicates with the return water tank, and the return water tank is for collecting the discharged water. The water discharge port 31 is provided on one side of the drain flap of the water discharge column 3.

[0037] In this embodiment, the return water tank may communicate with the high-pressure water tank, and after a certain amount of the discharged water accumulates, the water can be refluxed to the high-pressure water tank for reuse.

[0038] The connection side of the water discharge column 3 and the flap column 201 has a tapered structure that can be fixed with a clamp collar.

[0039] The control unit is electrically connected to the drain control device 204, the pressure sensor, the pressure adjustment device, the overflow valve, the vibration table 1, etc., and controls the operation of the durability test device 100 of the drain flap, such as the operation of the vibration table 1.

[0040] The present invention further provides a test method using the durability test device 100 of the drain flap. This test method includes: S1: Starting the vibration table 1 to simulate the vibration during the operation of the drain operation, especially the vibration generated during the flight of the aircraft; S2: Supply water into the water suction chamber by means of a high-pressure water tank to simulate the working environment of the drain flap 200. For example, when the water in the water storage chamber of an aircraft needs to be drained in a thunder or rain environment, use a pressure adjustment device to adjust the water pressure and simulate different working conditions, such as different water storage pressures. S3: Detect the water pressure in the water suction chamber by means of a pressure sensor. When the pressure in the water suction chamber exceeds the set value, activate the overflow valve to reduce the water pressure in the water suction chamber. When the pressure in the water suction chamber does not exceed the set value, control the drain rotating shaft 203 by means of a drain control device 204 to rotate the drain plate 202, control it to different drain angles, allow the discharged water to enter the water discharge chamber, and discharge it from the water discharge port 31.

[0041] Repeat the test in this way to test the durability of the drain flap 200.

[0042] The durability test device 100 for the drain flap of the present invention has a simple structure, can install the drain flap 200 in a more realistic environment, has a low test cost, and can continuously apply a load force. The test method using the durability test device 100 for the drain flap of the present invention is simple and the test results are accurate.

[0043] The technical features of the above embodiments can be arbitrarily combined. For the sake of simplifying the description, not all possible combinations of the technical features in the above embodiments are described. However, it goes without saying that as long as there is no contradiction in the combination of these technical features, they are all included in the protection scope of this specification.

[0044] The above embodiments only represent some embodiments of the present invention, and their descriptions are more specific and detailed, but they should not be construed as limiting the scope of the patent claims of the present invention. Without departing from the idea of the present invention, various changes and modifications made by those skilled in the art are all included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope of the patent claims.

Claims

1. A durability test device for a drain flap comprising a flap post, a drain plate provided in the flap post, and a drain rotary shaft connected to the drain plate, which is used to test the durability of the drain flap, The durability test device for the drain flap comprises a vibration table for imparting vertical reciprocating vibration, and a water inlet flange disk fixed to the vibration table for supplying water to the drain flap, The water inlet flange disk comprises a base fixed to the vibration table, and a water inlet post provided on a side of the base facing the drain flap, A water inlet is formed in the water inlet post, The water inlet post and the flap post surround a water absorption chamber, The water inlet communicates with the water absorption chamber, An overflow port communicating with the water absorption chamber is formed in the water inlet post. The durability test device for the drain flap is characterized by this.

2. The water inlet flange disk includes an overflow valve connected to the overflow port. The durability test device for the drain flap according to claim 1 is characterized by this.

3. The drain flap further comprises a drain control device connected to the drain rotary shaft, The drain control device is used to control the drain rotary shaft to rotate the drain plate, The drain control device is fixed to the flap post and the water inlet flange disk. The durability test device for the drain flap according to claim 2 is characterized by this.

4. The water inlet flange disk further comprises a fixed block fixed to the base, and a lug fixedly connected to the fixed block, The drain control device is fixedly connected to the lug. The durability test device for the drain flap according to claim 3 is characterized by this.

5. The durability test device for the water drainage flap further includes a water discharge column provided on a side away from the water inlet flange disk of the water drainage flap. The water discharge column and the flap column surround a water discharge chamber. The water drainage plate is provided between the water discharge chamber and the water suction chamber. The durability test device for the water drainage flap according to claim 4 is characterized by this.

6. A water discharge port is opened in the water discharge column. The durability test device for the water drainage flap according to claim 5 is characterized by this.

7. The water drainage control device further includes a pressure sensor. The pressure sensor is used to detect the water pressure in the water suction chamber. The durability test device for the water drainage flap according to claim 6 is characterized by this.

8. The durability test device for the water drainage flap further includes a high-pressure water tank. The high-pressure water tank communicates with the water inlet, and the high-pressure water tank is provided with a pressure adjustment device for controlling the water pressure entering the water suction chamber. The durability test device for the water drainage flap according to claim 7 is characterized by this.

9. A test method using the durability test device for the water drainage flap according to claim 8, The test method using the durability test device for the water drainage flap is, S1: Starting the vibration table to simulate the influence of vibration on the water drainage operation during operation; S2: Supplying water into the water suction chamber by the high-pressure water tank to simulate the working environment of the water drainage flap, and adjusting the water pressure by the pressure adjustment device to simulate different working conditions. S3: Detect the water pressure in the water absorption chamber by the pressure sensor. When the pressure in the water absorption chamber exceeds the set value, activate the overflow valve to reduce the water pressure in the water absorption chamber. When the pressure in the water absorption chamber does not exceed the set value, control the water drainage rotating shaft by the water drainage control device to rotate the water drainage plate, control it to different water drainage angles, allow the discharged water to enter the water discharge chamber, and discharge it from the water discharge port. A test method characterized by including the above steps.

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