Device for raining and durability test of airplane sealing element

Abstract

The utility model relates to a raining and endurance test device for an airplane sealing element. An existing airplane sealing element testing device cannot independently verify the rain performance of a sealing element, and a rain test and a durability test cannot be connected in series. The device comprises a lower mechanism and an upper mechanism, a plurality of movable limiting blocks are arranged between the lower mechanism and the upper mechanism, a sealing piece is fixed to the lower mechanism through a pressing assembly, and a pressing piece structure is fixed to the bottom of the upper mechanism and arranged above the sealing piece. Blocking mechanisms are respectively arranged on two sides of the device and are connected with the lower mechanism and the upper mechanism; the surface of the lower mechanism and the surface of the upper mechanism are provided with interfaces used for durability tests. According to the utility model, component-level large-size test verification is converted into small-size part-level test verification in a laboratory, the rain performance of the sealing element can be independently verified, and a rain test and a durability test can be connected in series.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing performance test technical field, concretely relates to a kind of rain and endurance test device of aircraft seal. BACKGROUND

[0002] The rain performance of aircraft seal is the key functional index to consider the flight working condition of aircraft seal, and the endurance performance is the important index to measure the safety performance and life of aircraft seal. Nowadays, the development of whole machine is obviously accelerated, and the requirements for functional safety, easy maintenance and durability are higher. The performance of rubber parts as the sealing performance between parts of machine determines the functional performance of aircraft, especially higher requirements are proposed for the existing water leakage problem, from permeable to not leaking, and the life requirement is greatly extended. The whole process of existing rain and endurance test of aircraft seal has high cost, long cycle and high threshold, and the final result is affected by other agencies and assembly factors, and the following problems exist in detail:

[0003] (1) the rain performance of the current technology for seal is mostly product verification of whole machine or assembly, component level, and the existing aircraft rain test related content is mostly inclined to the design of rain test bench, emphasizes the system control of rain test bench, accurate adjustment of rainfall, test bench versatility, water resource recycling and other contents, lacks separate evaluation of seal performance.

[0004] (2) the endurance performance of aircraft seal is generally tested randomly with aircraft and parts, and the endurance test of aircraft seal is mostly completed by test bench at present, the rain performance of product after endurance is indirectly represented by observing the appearance of seal, measuring the height of seal or compressing the recovery force, and lacks direct verification means of rain test function of seal after endurance test.

[0005] Therefore, an experimental device capable of performing part-level product rain test verification and directly performing rain test after endurance test is needed. SUMMARY

[0006] The utility model aims at providing a kind of rain and endurance test device of aircraft seal to at least solve the problems that existing aircraft seal test device cannot verify the rain performance of seal alone and cannot connect rain test and endurance test.

[0007] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0008] A kind of rain and endurance test device of aircraft seal, including lower mechanism and upper mechanism;

[0009] A plurality of movable limiting blocks are arranged between the lower mechanism and the upper mechanism, a sealing element is fixed on the lower mechanism by a pressing assembly, a pressing structure is fixed at the bottom of the upper mechanism, and the pressing structure is arranged above the sealing element;

[0010] Blocking mechanisms are arranged on both sides of the device, and the blocking mechanisms are connected with the lower mechanism and the upper mechanism.

[0011] The surfaces of the lower mechanism and the upper mechanism are provided with interfaces for durability tests.

[0012] Further, the lower mechanism and the upper mechanism are semicircular arcs with a middle convex part and two end concave parts.

[0013] Further, the longitudinal section of the lower mechanism and the upper mechanism is a right-angled trapezoid.

[0014] Further, the longitudinal section of the sealing element is in the shape of P, Ω or peach heart.

[0015] Further, a plurality of mounting holes are arranged in the handle of the sealing element.

[0016] Further, the pressing assembly comprises an arc-shaped plate and a countersunk screw, a plurality of screw holes are arranged on the arc-shaped plate, the countersunk screw passes through the screw holes and the mounting holes of the sealing element in sequence, and the countersunk screw is fixed on the lower mechanism.

[0017] Further, one side of the blocking mechanism does not exceed the observation surface, and the other side exceeds the contact surface between the sealing element and the pressing structure but does not exceed the height of the rain surface of the sealing element.

[0018] Further, the blocking mechanism is a cuboid structure, and four corners of the cuboid structure are fixed on the side end surfaces of the lower mechanism and the upper mechanism.

[0019] Further, the movable limiting blocks are at least three, are arranged at the middle parts and the positions close to the two ends of the lower mechanism and the upper mechanism, and are distributed in a triangular shape.

[0020] Further, the lengths of the lower mechanism and the upper mechanism are 100-500 mm.

[0021] Compared with the prior art, the device has the following beneficial effects:

[0022] 1. The rain and durability test device for the aircraft seal of the utility model provides a kind of, it is the test verification of large-size test of component level into the test verification of small-size part level in laboratory, the rain performance of seal can be verified separately, while reducing verification cost, shorten verification period, and by being provided with the interface for durability test on lower mechanism and upper mechanism, the functional test and durability test of rain test can be connected in series.

[0023] 2, the utility model discloses a sealing mechanism is set, avoid the accumulation of rain test water flow and the water flow of non-sealing surface enters the inside of device and influences test observation;Adopt raw rubber sealing connection, the effective sealing of device is realized, avoid the judgment of the rain performance of seal by the water leakage of remaining non-sealing surface part, while realizing the simple disassembly and reassembly and recycling of device;And the utility model has good applicability, can be used for different product cross section such as P type, omega type, peach heart shape, is applicable to the test verification under different installation structure, different compression structure and different compression state. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain the drawings of other embodiments according to these drawings without creating creative labor.

[0025] Figure 1 It is the utility model overhead view sectional view;

[0026] Figure 2 It is Figure 1 A-A section in the figure;

[0027] Figure 3 It is the utility model side view;

[0028] Figure 4 It is the utility model use state schematic view;

[0029] Marked as in the figure:

[0030] 1-lower mechanism, 2-seal, 3-pressing assembly, 4-pressing piece structure, 5-upper mechanism, 6-movable limit block, 7-sealing mechanism. DETAILED DESCRIPTION

[0031] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Example:

[0035] like Figure 1 As shown, this embodiment provides a rain and durability testing device for aircraft seals. This rain and durability testing device is designed during the product design stage according to the installation and usage status of the seal 2 on the aircraft. Through rain and durability tests on sample sections, the actual functional performance of the seal 2 is evaluated. It is used for comprehensive verification of the configuration, assembly and usage functions of the seal 2, guides the forward design of the seal 2, shortens the development cycle and reduces development costs.

[0036] Specifically, this embodiment includes a lower mechanism 1 and an upper mechanism 5. The lower mechanism 1 and the upper mechanism 5 are generally semi-circular arcs with a convex middle and concave ends. The curvature is consistent with the actual assembly structure. Furthermore, the longitudinal section of the lower mechanism 1 and the upper mechanism 5 is generally a right trapezoid. The shape and assembly relationship of the lower mechanism 1 and the upper mechanism 5 are consistent with the actual assembly and use scenario of the seal 2.

[0037] Preferably, the lengths of the lower mechanism 1 and the upper mechanism 5 are 100-500 mm.

[0038] In this embodiment, the longitudinal section of the sealing member 2 is P-shaped, and the handle portion of the sealing member 2 is provided with a plurality of mounting holes. In other embodiments, the longitudinal section of the sealing member 2 can also be Ω-shaped or heart-shaped.

[0039] As shown in Figure 2 , the sealing member 2 is fixed to the lower mechanism 1 by the pressing assembly 3, and the pressing assembly 3 includes an arc-shaped plate and a countersunk screw. The arc-shaped plate is a flat metal sheet with a size, thickness, and curvature consistent with the actual use and assembly state of the sealing member 2. A plurality of screw holes are uniformly arranged on the arc-shaped plate. The countersunk screw passes through the screw holes on the arc-shaped plate and the mounting holes on the sealing member 2 in sequence and is fixed to the lower mechanism 1, thereby fixing the sealing member 2 to the lower mechanism 1. In other embodiments, the pressing assembly 3 can be replaced according to the actual installation and use conditions.

[0040] The pressing member structure 4 is fixed to the bottom of the upper mechanism 5 by bolts and is sealed with raw rubber. The pressing member structure 4 is located above the sealing member 2. According to actual needs, the material and surface state of the pressing member structure 4 can be adjusted to simulate different assembly conditions of the sealing member 2.

[0041] In this embodiment, three movable limiting blocks 6 are arranged between the lower mechanism 1 and the upper mechanism 5, respectively arranged at the middle and near the ends of the lower mechanism 1 and the upper mechanism 5, and arranged in an isosceles triangle shape. The movable limiting blocks 6 are fixedly connected to the lower mechanism 1 and the upper mechanism 5 by bolts. At this time, the sealing member 2 is in contact with the pressing member structure 4. By adjusting and replacing the movable limiting blocks 6 with different heights, the compression amount of the sealing member 2 can be controlled, thereby simulating the working state of the sealing member 2.

[0042] As shown in Figure 3 , the device is provided with a blocking mechanism 7 on each side. The blocking mechanism 7 is a cuboid structure. The four corners of the blocking mechanism 7 are fixed to the side end faces of the lower mechanism 1 and the upper mechanism 5 by bolts and are sealed with raw rubber. The blocking mechanism 7 is tightly attached to the two ends of the sealing member 2. The height of the blocking mechanism 7 is less than the height from the bottom surface of the lower mechanism 1 to the top surface of the upper mechanism 5. The observation direction end of the blocking mechanism 7 does not exceed the observation surface, and the rain direction end exceeds the contact surface of the sealing member 2 and the pressing member structure 4 but does not exceed the height of the rain surface of the sealing member 2, and is sealed with raw rubber.

[0043] During the rain test, the sealing member 2 is in a static state. A spraying type water injector is used to uniformly spray water on the sealing member 2, which is vertically sprayed onto the surface of the sealing member 2. The rainfall intensity is 130 mm / h to 230 mm / h, and the spraying time is at least 20 minutes. Alternatively, the rainfall intensity is 50.8 mm / h, and the spraying time is at least 8 hours. The simulated rainfall intensity should be measured by placing a standard rain gauge of the National Meteorological Bureau on the surface of the sealing member 2.

[0044] In this embodiment, the lower mechanism 1 and the upper mechanism 5 are both provided with interfaces for durability test, which meets the requirement that the service life of the aircraft seal 2 is not less than 90000 cycles under normal use environment during the entire service period, and the seal 2 still meets the related requirements of the rain test after the durability test.

[0045] In this embodiment, each component is made of metal material, and the surface is plated.

[0046] In this embodiment, the rain performance of the large-size aircraft seal 2 is tested by the small-size test piece, and the interface between the test device and the durability test bench (test tooling) is designed. The rain test and the durability test are connected in series to realize the correlation and effective test verification of the durability index and the rain functionality index of the seal 2. The rain performance of the seal 2 and the rain performance after the durability are evaluated at the part level, which can meet the requirements of short-time rainfall and long-time rainfall.

[0047] The test steps of this embodiment are as follows:

[0048] (1) Install the seal 2

[0049] The seal 2 to be tested is connected to the lower mechanism 1 through the compression assembly 3.

[0050] (2) Device packaging

[0051] Select the appropriate compression piece structure 4 and the movable limiting block 6. The compression piece structure 4 is connected to the upper mechanism 5 by bolts and sealed with raw rubber. The installed lower mechanism 1, the installed upper mechanism 5, the movable limiting block 6, and the sealing blocking mechanism 7 on both sides are connected by bolts. The sealing blocking mechanism 7 on both sides is sealed with raw rubber on both ends of the upper mechanism 5, the lower mechanism 1, and the seal 2.

[0052] (3) Rain test

[0053] As shown in Figure 4 , the packaged seal 2 and the test device are placed on the rain test bench with the rain-facing upward. The test conditions such as the amount of rain are adjusted according to the actual requirements, and the rain test is started. The rain test results are observed at different time intervals as needed. Figure 4 The upper arrow is the rain direction, and the lower arrow is the observation direction.

[0054] (4) Durability test

[0055] Open the bolts connecting the sealing blocking mechanism 7 and the movable limiting block 6, and connect the lower mechanism 1 and the upper mechanism 5 to the durability test bench through the interface. Set the compression cycle frequency, amplitude, and cycle number. When the test requirement number is reached, pause the test, observe the surface state of the seal 2, and prepare for subsequent tests.

[0056] (5) Rain test after durability

[0057] After the durability test in (4) is completed, the two side sealing mechanisms 7 and the movable limiting blocks 6 are resealed according to the requirements in (2), and then the rain test is performed again according to the rain test steps in (3).

[0058] The above describes the utility model by using specific examples, which is only used to help understand the utility model and does not limit the utility model. According to the idea of the utility model, the skilled person in the technical field to which the utility model belongs can also make a number of simple deductions, deformations or substitutions.

Claims

1. An apparatus for rain and endurance testing of aircraft seals, characterized in that: It comprises a lower mechanism (1) and an upper mechanism (5); A plurality of movable limiting blocks (6) are arranged between the lower mechanism (1) and the upper mechanism (5), a sealing element (2) is fixed to the lower mechanism (1) by a pressing assembly (3), and a pressing element structure (4) is fixed to the bottom of the upper mechanism (5) and arranged above the sealing element (2); Blocking mechanisms (7) are arranged on both sides of the device, and the blocking mechanisms (7) are connected with the lower mechanism (1) and the upper mechanism (5); The surfaces of the lower mechanism (1) and the upper mechanism (5) are provided with interfaces for durability test.

2. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The lower mechanism (1) and the upper mechanism (5) are semicircular arcs with a convex middle and concave ends.

3. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The longitudinal sections of the lower mechanism (1) and the upper mechanism (5) are overall right-angled trapezoids.

4. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The longitudinal sections of the sealing element (2) are P-shaped, Ω-shaped or peach-shaped.

5. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: A plurality of mounting holes are arranged in the handle of the sealing element (2).

6. The rain and durability test device for aircraft sealing elements according to claim 5, characterized in that: The pressing assembly (3) comprises an arc-shaped plate and countersunk screws, a plurality of screw holes are arranged on the arc-shaped plate, and the countersunk screws are sequentially arranged through the screw holes and the mounting holes of the sealing element (2) and fixed to the lower mechanism (1).

7. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: One side of the blocking mechanism (7) does not exceed the observation surface, and the other side exceeds the contact surface of the sealing element (2) and the pressing element structure (4) but does not exceed the height of the rain surface of the sealing element (2).

8. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The blocking mechanism (7) is a cuboid structure, and the four corners of the cuboid structure are fixed to the side end surfaces of the lower mechanism (1) and the upper mechanism (5).

9. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The movable limiting blocks (6) are at least three, arranged at the middle and near the two ends of the lower mechanism (1) and the upper mechanism (5) and distributed in a triangular shape.

10. The rain and durability test device for aircraft sealing elements according to claim 1, characterized in that: The lengths of the lower mechanism (1) and the upper mechanism (5) are 100-500 mm.

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