Testing equipment for shimmy damper

Abstract

The utility model discloses a shimmy damper test device, comprising a support assembly which comprises a first fixing plate; the testing assembly comprises a servo hydraulic cylinder, an energy accumulator, a servo valve, a push-pull force sensor and a connecting adapter; the servo hydraulic cylinder is fixedly connected to the center of the outer end of the first fixing plate, the energy accumulators are fixedly connected to the two sides of the upper end of the servo hydraulic cylinder, the servo valve is fixedly connected to the upper portion of the front end of the servo hydraulic cylinder, and the push-pull force sensor is fixedly connected to the outer end of the servo hydraulic cylinder. And the connection adapter is fixedly connected to the outer end of the push-pull force sensor. According to the utility model, the problems that when a conventional shimmy damper is used for testing the shimmy damping effect, a servo motor is usually used for testing the shimmy damping effect of the shimmy damper, and when the servo motor is used for measuring, the measured distance is difficult to control and the force applied to the shimmy damper by the servo motor cannot be accurately controlled are solved; and measurement is not convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of shimmy dampers, in particular to a shimmy damper testing device. Background Art

[0002] The shimmy damper, also called the landing gear shimmy reducer, is a damping structure installed on the aircraft to prevent the front wheel from shimmying. It does not restrict the rotation of the front wheel, but only reduces the shimmy speed, absorbs the impact energy generated by the shimmy, and prevents the occurrence of shimmy. Since the shimmy damper's shimmy reduction effect needs to be measured regularly, it needs to be done with dedicated test equipment.

[0003] However, it still has the following disadvantages in actual use:

[0004] When testing the sway reduction effect of existing sway dampers, a servo motor is usually used to test the sway reduction effect of the sway damper. Since it is difficult to control the measurement distance during measurement by the servo motor and the force applied by the servo motor to the sway damper cannot be accurately controlled, it is not convenient to measure.

[0005] Therefore, a new shimmy damper testing device is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a sway damper testing device to solve the problem proposed in the above background technology that when testing the sway reduction effect of the existing sway damper, a servo motor is usually used to test the sway reduction effect of the sway damper. Since it is difficult to control the measurement distance during measurement by the servo motor and the force applied by the servo motor to the sway damper cannot be accurately controlled, it is not convenient to perform measurement.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model is a shimmy damper testing device, comprising:

[0009] A support assembly, the support assembly comprising a first fixing plate;

[0010] A test assembly, the test assembly comprising a servo hydraulic cylinder, an accumulator, a servo valve, a push-pull force sensor and a connecting adapter;

[0011] The servo hydraulic cylinder is fixedly connected to the central position of the outer end of the first fixed plate, the accumulator is fixedly connected to the two sides of the upper end of the servo hydraulic cylinder, the servo valve is fixedly connected to the upper position of the front end of the servo hydraulic cylinder, the push-pull force sensor is fixedly connected to the outer end position of the servo hydraulic cylinder, and the connecting adapter is fixedly connected to the outer end position of the push-pull force sensor.

[0012] Furthermore, the support assembly also includes a working plate, a limiting rod, a second fixing plate and a shimmy damper;

[0013] The first fixed plate is fixedly connected to one side of the upper end of the working plate, the second fixed plate is fixedly connected to the other side of the upper end of the working plate, the limiting rod passes through the four corners of the first fixed plate and the second fixed plate, and the swing damper is fixedly connected to the central position of the outer end of the second fixed plate.

[0014] Furthermore, the push-pull force sensor and the connecting adapter are located at a central position inside the first fixing plate, and an outer end of the connecting adapter is in contact with an outer end of the shimmy damper.

[0015] Furthermore, the servo hydraulic cylinder contains a displacement sensor inside, and the shimmy damper extends inwardly through the center of the second fixing plate.

[0016] Furthermore, the accumulator and the servo valve are located outside the first fixed plate, and the four corners of the first fixed plate and the second fixed plate are respectively provided with through holes opened relative to the limit rod.

[0017] Furthermore, the first fixing plate and the second fixing plate are connected to both sides of the upper end of the working plate by fixing bolts, and the servo hydraulic cylinder and the shimmy damper are located above the working plate.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The utility model sets a servo hydraulic cylinder, makes the hydraulic transmission correspond to the hydraulic transmission inside the shimmy damper, and compensates the pressure of the servo hydraulic cylinder through the accumulator, so as to achieve uniform pressure on the shimmy damper. At the same time, a servo valve is used to limit the pressure, and a push-pull force sensor and a displacement sensor are used to accurately control the measurement.

[0020] 2. Based on beneficial effect 1, the second fixed plate is supported by setting a limit rod so that different specifications of shimmy dampers can be fixed at the central position of the outer end of the second fixed plate, so that the outer end of the shimmy damper and the connection adapter position correspond to each other, which is convenient for replacing the specifications of the shimmy damper to be tested.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is the front view of the utility model;

[0024] Figure 2 This is the front view of the utility model;

[0025] Figure 3 It is a top view of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Working plate; 2. First fixed plate; 3. Servo hydraulic cylinder; 4. Accumulator; 5. Servo valve; 6. Push-pull force sensor; 7. Connecting adapter; 8. Limit rod; 9. Second fixed plate; 10. Swing damper. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1-3 As shown, this embodiment is a shimmy damper testing device, comprising:

[0033] A support assembly, the support assembly comprises a first fixing plate 2;

[0034] A test assembly, the test assembly includes a servo hydraulic cylinder 3, an accumulator 4, a servo valve 5, a push-pull force sensor 6 and a connecting adapter 7;

[0035] The servo hydraulic cylinder 3 is fixedly connected to the center of the outer end of the first fixed plate 2, the accumulator 4 is fixedly connected to the two sides of the upper end of the servo hydraulic cylinder 3, the servo valve 5 is fixedly connected to the upper front end of the servo hydraulic cylinder 3, the push-pull force sensor 6 is fixedly connected to the outer end of the servo hydraulic cylinder 3, and the connecting adapter 7 is fixedly connected to the outer end of the push-pull force sensor 6;

[0036] The servo hydraulic cylinder 3 is used to provide the test pressure, the accumulator 4 is used to limit and compensate the measured pressure, the servo valve 5 is used to control the pressure of the servo hydraulic cylinder 3, the push-pull force sensor 6 is used to measure the pressure of the servo test, and the connecting adapter 7 is used to contact the outer side of the shimmy damper 10;

[0037] The support assembly also includes a working plate 1, a limiting rod 8, a second fixing plate 9 and a shimmy damper 10;

[0038] The first fixing plate 2 is fixedly connected to one side of the upper end of the working plate 1, the second fixing plate 9 is fixedly connected to the other side of the upper end of the working plate 1, the limiting rod 8 passes through the four corners of the first fixing plate 2 and the second fixing plate 9, and the shimmy damper 10 is fixedly connected to the center of the outer end of the second fixing plate 9;

[0039] The working plate 1 is used to support the first fixing plate 2 and the second fixing plate 9, the limiting rod 8 keeps the first fixing plate 2 and the second fixing plate 9 flush, and the second fixing plate 9 is used to support the shimmy damper 10;

[0040] The push-pull force sensor 6 and the connecting adapter 7 are located at the center of the inner side of the first fixing plate 2, and the outer end of the connecting adapter 7 is in contact with the outer end of the shimmy damper 10;

[0041] The servo hydraulic cylinder 3 applies a push-pull force to the push-pull force sensor 6 and applies a push-pull force to the shimmy damper 10 through the connecting adapter 7;

[0042] The servo hydraulic cylinder 3 contains a displacement sensor inside, and the shimmy damper 10 extends inwardly through the center of the second fixing plate 9;

[0043] The displacement sensor can be used to measure the movement distance of the shimmy damper 10 by the servo hydraulic cylinder 3;

[0044] The accumulator 4 and the servo valve 5 are located outside the first fixing plate 2, and the first fixing plate 2 and the second fixing plate 9 have through holes at the four corners thereof respectively, which are opened relative to the limit rod 8;

[0045] The first fixing plate 2 and the second fixing plate 9 are connected to both sides of the upper end of the working plate 1 by fixing bolts, and the servo hydraulic cylinder 3 and the shimmy damper 10 are located above the working plate 1;

[0046] By changing the position of the second fixing plate 9 on the upper end of the working plate 1, the position of the shimmy damper 10 can be changed, and by replacing the second fixing plate 9, different shimmy dampers 10 can be fixed;

[0047] Working principle: fix the shimmy damper 10 at the central position of the outer end of the second fixed plate 9, then pass the second fixed plate 9 through the limit rod 8, and fix the second fixed plate 9 at the upper end position of the working plate 1 by fixing bolts, so that the first fixed plate 2 and the second fixed plate 9 are flush. At this time, the outer end of the shimmy damper 10 is in contact with the connecting adapter 7, and the servo hydraulic cylinder 3 is started. The servo hydraulic cylinder 3 starts to apply a push-pull force to the push-pull force sensor 6, and the push-pull force sensor 6 applies a push-pull force to the shimmy damper 10 through the connecting adapter 7. In this process, the accumulator 4 and the servo valve 5 control and compensate the push-pull force to keep the push-pull force uniform, and the displacement sensor can measure the shimmy distance of the shimmy damper 10.

[0048] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A shimmy damper testing device, characterized in that: include: A support assembly, the support assembly comprising a first fixing plate (2); A test assembly, the test assembly comprising a servo hydraulic cylinder (3), an accumulator (4), a servo valve (5), a push-pull force sensor (6) and a connecting adapter (7); The servo hydraulic cylinder (3) is fixedly connected to the center position of the outer end of the first fixed plate (2), the accumulator (4) is fixedly connected to the positions on both sides of the upper end of the servo hydraulic cylinder (3), the servo valve (5) is fixedly connected to the upper position of the front end of the servo hydraulic cylinder (3), the push-pull force sensor (6) is fixedly connected to the outer end position of the servo hydraulic cylinder (3), and the connecting adapter (7) is fixedly connected to the outer end position of the push-pull force sensor (6).

2. A shimmy damper testing device according to claim 1, characterized in that: The support assembly further comprises a working plate (1), a limiting rod (8), a second fixing plate (9) and a shimmy damper (10); The first fixing plate (2) is fixedly connected to one side of the upper end of the working plate (1), the second fixing plate (9) is fixedly connected to the other side of the upper end of the working plate (1), the limiting rod (8) passes through the four corners of the first fixing plate (2) and the second fixing plate (9), and the shimmy damper (10) is fixedly connected to the central position of the outer end of the second fixing plate (9).

3. A shimmy damper testing device according to claim 1, characterized in that: The push-pull force sensor (6) and the connecting adapter (7) are located at the central position of the inner side of the first fixed plate (2), and the outer end of the connecting adapter (7) is in contact with the outer end of the shimmy damper (10).

4. A shimmy damper testing device according to claim 1, characterized in that: The servo hydraulic cylinder (3) contains a displacement sensor inside, and the shimmy damper (10) penetrates the center of the second fixed plate (9) and extends inwardly.

5. The shimmy damper testing device according to claim 1, characterized in that: The accumulator (4) and the servo valve (5) are located outside the first fixed plate (2), and the first fixed plate (2) and the second fixed plate (9) are respectively provided with through holes opened relative to the limit rod (8) at the four corners.

6. A shimmy damper testing device according to claim 1, characterized in that: The first fixing plate (2) and the second fixing plate (9) are connected to the upper ends of the working plate (1) at both sides thereof via fixing bolts, and the servo hydraulic cylinder (3) and the shimmy damper (10) are located above the working plate (1).

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