A pressure measuring tube transfer installation structure of a blowing model and a blowing model

Abstract

The present invention relates to the technical field of wind tunnel test, and provides a pressure measuring tube switching installation structure of a blowing model, including a fixed gasket, a pressure measuring tube and a sealing ring, wherein the fixed gasket is provided with a plurality of step holes, the step holes include a large diameter section and a small diameter section, the pressure measuring tube is placed in the small diameter section and welded thereto, and the sealing ring is arranged in the large diameter section. A blowing model is also disclosed, including a main wing, an aileron and the pressure measuring tube switching installation structure, wherein the main wing and the aileron are connected, and the main wing is provided with a mounting groove, the fixed gasket is arranged in the mounting groove, the pressure measuring tube is arranged from one side to the other side inside the main wing, and an air flow channel connected to the pressure measuring tube is provided through the aileron. The present invention ensures that the absolute wall thickness of the aileron meets the experimental requirements by 3D printing a 2mm-3mm air flow channel on the aileron, and is suitable for a blowing model with a model pressure measuring point distribution chord length that is backward or a thin wall thickness.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning devices, and in particular to a pressure measuring tube adapter installation structure of a blowing model and the blowing model. Background Art

[0002] In the development process of various types of aircraft (especially various types of aircraft), it is necessary to manufacture an aircraft pressure blowing model to test and verify the air pressure. The wings of an aircraft are mainly used to generate lift to make the aircraft fly, and the aileron is the main control component of the aircraft wing. In the pressure blowing test, multiple angles need to be changed. In the structural design of the traditional pressure blowing model, many small holes are always drilled on the surface of the aileron, and then the pressure measuring tube is installed on the small holes on the surface of the aileron. The pressure measuring tube wiring groove processed on the surface of the aileron enters the main wing of the wing and is finally connected to the pressure gauge. In order to leave a certain installation space for the pressure measuring tube in the aileron, it is necessary to have sufficient absolute wall thickness at the pressure measuring point of the aileron. Since the diameter of the pressure measuring tube is eight or nine millimeters, the wall thickness of the aileron increases, which not only affects the experimental data, but also this design method is difficult to adapt to the blowing model with a chord length of the model pressure measuring point distribution at the back or a thin wall thickness.

[0003] Therefore, how to solve the above problems has become the focus of research in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a pressure measuring tube adapter installation structure of a blowing model and a blowing model to solve the problems of the existing technology.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A pressure measuring tube adapter installation structure for a blowing model includes a fixed gasket, a pressure measuring tube and a sealing ring. The fixed gasket is provided with a plurality of step holes, and the step holes include a large diameter section and a small diameter section. The pressure measuring tube is placed in the small diameter section and welded thereto, and the sealing ring is arranged in the large diameter section.

[0007] Furthermore, positioning protrusions are provided at the bottoms of both ends of the long axis of the fixed gasket.

[0008] A blowing model comprises a main wing, an aileron and a pressure measuring tube adapter installation structure, wherein the main wing and the aileron are connected, and a mounting groove is provided on the surface of the main wing for connecting with the aileron, the fixing gasket is provided in the mounting groove, the pressure measuring tube is provided along the inside of the main wing from a side close to the aileron to a side away from the aileron, and an airflow channel connected to the pressure measuring tube is provided in the aileron from a side away from the main wing to a side close to the main wing.

[0009] Furthermore, a stepped hole for sealingly connecting the sealing ring is provided at a pipeline opening on one side of the air flow channel close to the pressure measuring tube.

[0010] Furthermore, the inner diameter of the air flow channel is 2mm-3mm.

[0011] Furthermore, the center of the terminal pipe opening of the air flow channel and the center of the step hole are on the same straight line.

[0012] Furthermore, one end of the pressure measuring tube away from the aileron is connected to a pressure gauge.

[0013] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0014] The pressure measuring tube adapter installation structure for the pressure measuring blowing model provided by the present invention is not only simple in structure and easy to install, but also when applied to the blowing model, there is no need to set a pipe groove for installing the pressure measuring tube in the aileron. It is only necessary to print a 2mm-3mm air flow channel through 3D printing, thereby ensuring that the absolute wall thickness of the aileron meets the experimental requirements, and is suitable for the blowing model with a model pressure measuring point distribution chord length at the rear or a thinner wall thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a pressure measuring tube transfer installation structure of a blowing model provided in Example 1 of the present invention;

[0017] Figure 2 It is an exploded view of a pressure measuring tube transfer installation structure of a blowing model provided in Example 1 of the present invention;

[0018] Figure 3 is a structural schematic diagram of a blowing model provided by Embodiment 2 of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the main wing;

[0020] Figure 5 It is a structural schematic diagram of the connection between a pressure measuring tube adapter installation structure of a blowing model provided in Example 1 of the present invention and a main wing.

[0021] Icons: 1-fixing gasket, 2-sealing ring, 3-pressure measuring tube, 4-main wing, 5-step hole, 6-positioning protrusion, 7-aileron, 8-mounting groove, 9-airflow channel. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] See also Figure 1 to Figure 2 As shown, this embodiment provides a pressure measuring tube adapter installation structure for a blowing model, including a fixed gasket 1, a pressure measuring tube 3 and a sealing ring 2. The fixed gasket 1 is provided with a plurality of step holes 5 penetrating from the upper end face to the lower end face. The step hole 5 includes a large diameter section and a small diameter section. The large diameter section is closer to the upper end face, and the small diameter section is closer to the lower end face. The pressure measuring tube 3 is placed in the small diameter section and is laser welded to the inner wall of the small diameter section. The sealing ring 2 is arranged in the large diameter section. No lubricating oil or lubricant can be applied to the step hole 5. In general, for sealing rings 2 of different sizes, the step hole 5 has the following design principles:

[0026] (1) Depth design of step hole:

[0027] H=d2n cr

[0028] H-hole depth (depth of the sealing ring hole);

[0029] d2-wire diameter (seal ring wire diameter);

[0030] n cr -Compression rate (the ratio of the sealing ring to compression) is generally 15% to 30%.

[0031] (2) Diameter design of step hole:

[0032] D=d1+Δd1+2d2+2Δd2

[0033] D-hole diameter (diameter of the hole for installing the sealing ring);

[0034] Δd1-inner diameter difference (error of the inner diameter of the sealing ring), generally ±0.1mm;

[0035] Δd2-wire diameter difference (error of the sealing ring wire diameter), generally ±0.08mm;

[0036] d1-inner diameter (inner diameter of the sealing ring);

[0037] d2-wire diameter (seal ring wire diameter)

[0038] Example 2

[0039] See also Figures 1 to 5 As shown, this embodiment provides a blowing model, including a main wing 4, an aileron 7 and the pressure measuring tube 3 adapter installation structure described in Example 1, the inside of the main wing 4 is provided with a penetrating pressure measuring tube 3 placement groove from the outer edge side to the inner edge side, the pressure measuring tube 3 is arranged along the pressure measuring tube 3 placement groove from the outer edge side to the inner edge side, and is connected to the pressure gauge on the inner edge side.

[0040] The outer edge of the main wing 4 is provided with a mounting groove 8. When the pressure measuring tube 3 is installed, the fixing gasket 1 is placed in the mounting groove 8. In order to make the fixing gasket 1 fit tightly with the main wing 4, positioning protrusions 6 are integrally formed at the bottom of the left and right ends of the fixing gasket 1 to increase the friction between the main wing 4 and the fixing gasket 1. Generally, the fixing gasket 1 is glued in the mounting groove 8 by AB glue; if the positioning protrusions 6 on both sides of the fixing gasket 1 have sufficient thickness, they can also be fixed by screw connection.

[0041] After the sealing ring 2 is installed in the step hole 5, the aileron 7 is installed on the outer edge of the main wing 4. An air flow channel 9 connected to the pressure measuring tube 3 is provided in the aileron 7 from the side away from the main wing 4 to the side close to the main wing 4. The inner diameter of the air flow channel 9 is 2mm-3mm. It is formed by 3D printing. The center of the terminal pipe opening of the air flow channel 9 is in the same straight line as the center of the step hole 5. A stepped hole for sealingly connecting the sealing ring 2 is provided at the pipe opening of the air flow channel 9 close to the pressure measuring tube 3 to ensure the sealing of the connection between the main wing 4 and the aileron 7.

[0042] From the above content, it can be seen that the blowing model provided in this embodiment communicates with the pressure measuring tube 3 by 3D printing an air flow channel 9 with an inner diameter of 2mm-3mm inside the aileron 7, so that the air flow goes along the air flow channel 9 through the pressure measuring tube 3 to reach the pressure gauge to complete the pressure measurement.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blowing model, characterized in that: The invention comprises a main wing (4), an aileron (7) and a pressure measuring tube transfer installation structure, wherein the pressure measuring tube transfer installation structure comprises a fixed gasket (1), a pressure measuring tube (3) and a sealing ring (2), wherein the fixed gasket (1) is provided with a plurality of step holes (5), wherein the step holes (5) comprise a large diameter section and a small diameter section, wherein the pressure measuring tube (3) is placed in the small diameter section and welded thereto, and wherein the sealing ring (2) is arranged in the large diameter section; The main wing (4) and the aileron (7) are connected, and a mounting groove (8) is provided on the surface of the main wing (4) for connecting to the aileron (7), the fixing gasket (1) is arranged in the mounting groove (8), the pressure measuring tube (3) is arranged along the inside of the main wing (4) from the side close to the aileron (7) to the side away from the aileron (7), and an air flow channel (9) formed by 3D printing is arranged in the aileron (7) from the side away from the main wing (4) to the side close to the main wing (4), the air flow channel (9) is communicated with the pressure measuring tube (3), and a stepped hole for sealingly connecting the sealing ring (2) is provided at the pipe opening of the air flow channel (9) close to the side of the pressure measuring tube (3).

2. The blowing model according to claim 1, characterized in that: Positioning protrusions (6) are provided at the bottoms of both ends of the long axis of the fixed gasket (1).

3. The blowing model according to claim 1, characterized in that: The inner diameter of the air flow channel (9) is 2 mm-3 mm.

4. The blowing model according to claim 1, characterized in that: The center of the terminal pipe opening of the air flow channel (9) and the center of the step hole (5) are on the same straight line.

5. The blowing model according to claim 1, characterized in that: One end of the pressure measuring tube (3) away from the aileron (7) is connected to a pressure gauge.

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