JPS63170196A - Wing detachable method of model for wind tunnel test - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in a method for removing a blade layer of a wind tunnel test model of a spacecraft.

[Conventional technology]

Figure 3 is an external view of the wind tunnel test model (No. 11, and here, for convenience, explanation will be given in terms of a flying object. This model +1) is as follows:
A hollow cylindrical body (2), four JKs (Fl) to (F4) attached in the circumferential direction of the body (2), and a conical model attached to one end of the body (2). The head is composed of a nose (3).

In wind tunnel tests, installing a protrusion on the outside of the model (1) causes a change in the flow in that area, and in order to influence the test results, a measuring device is installed inside the body (2) of the model (1) to measure the flow of the flying object. It is common to measure the forces that the aircraft receives during flight. Therefore, the inside of the fuselage (2) must be hollow, and ailL(Fl) to (F4) must be fixed near the outer periphery of the fuselage (2). There are also limitations to the method.

Figure 4 is a conventional wind tunnel test model (the method for installing the wing (F) in No. 11 is a schematic diagram. In Figure 9, (2) is the fuselage, and (F) is the wing.

CP) is a rectangular image part that is integral with the above X(F),
If is a long hole provided in the circumferential longitudinal direction of the body (2) and engages with the rectangular convex part (P), #')
After fitting the rectangular convex part (P) into the long hole), the wing (F) and the fuselage (2) are fixed using a jig and then glued or brazed. It was connected.

[Problem that the invention seeks to solve]

In the conventional joining method, the wings and fuselage are joined using adhesive or brazing as described above, so the joining strength between the wings and the fuselage is greatly influenced by the working conditions, and it is not possible to always maintain a uniform joining strength. The problem was that it was difficult to guarantee that Particularly regarding brazing, since heat is applied after machining the wings and fuselage, there are problems such as a reduction in the processing n1 area due to thermal deformation and deterioration of the heat treatment effects such as quenching.

By the way, one of the parts of a spacecraft that most significantly affects its flight characteristics is the wing, so in wind tunnel tests it is often necessary to test the same fuselage shape by changing only the wing shape. arise. However, in the conventional joining method, the wings and the fuselage are bonded or brazed, making it difficult to change only the wings. Therefore, there was a problem in that even the fuselage, which had not been changed in any way, had to be rebuilt.

This invention was made to improve these problems, and aims to provide a method for attaching and detaching the blades of a wind tunnel test model that increases joint strength, avoids deformation due to heating, and makes it possible to replace the blades. purpose.

[Means for Solving the Problems] The wing attachment/detachment method according to the present invention includes a cylindrical body having long holes in two circumferential longitudinal directions and a screw at one end; A wing with a rectangular convex part and a pin hole provided there.

A pin screw is provided that includes a cylindrical pin and a thread that interlocks with the body.

[Operation] In this invention, the positions of the wing and the fuselage are determined by fitting the rectangular convex part of the wing into the elongated hole of the fuselage, and the pin provided at one end of the pin screw is determined by fitting the pin screw to the fuselage. Butt it into the pin hole of the wing.

Fix the wings to the fuselage.

〔Example〕

FIG. 1 is an overall configuration diagram of an embodiment of the blade attachment/detachment method according to the present invention, and is common to FIGS. 3 and 4.

(Fl) ~ (H4) , (Pt) ~ (H4) #
(2) l (Hl) + (H4), - pin holes (K1) provided in the rectangular convex portions (Pl) to (H4)
K4), a screw (N) provided at one end of the body (2)
, pins (S) that engage the above pin holes (K1) to (K4)
The pin screws (Jl) to (J4) each include a screw (Nb) that fits into the screw (Na).

FIG. 2 is a cross-sectional view of FIG. 1 taken along a plane including JiiL (Fz) and g (H4), and all symbols are the same as in FIG. 1.

In Fig. 1, the wings (Fl) to (H4) and the fuselage (2) are fixed by connecting the rectangular convex parts (Pl) to (H4) to the long holes (Hl).
) to (H4), insert pin C into pin hole (K).
This is accomplished by fixing the pin (8) by engaging the screw (N,) and the screw (Nb).

〔Effect of the invention〕

As described above, according to the present invention, since the wing and the fuselage are mechanically joined using pins, the joint strength can be increased compared to adhesion or brazing. Furthermore, unlike brazing, there is no need to apply heat, so problems such as deformation due to heat and deterioration due to heat treatment do not occur. Further, according to the present invention, when the blade shape is changed due to a change in experimental conditions, only X can be replaced.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of an embodiment of the method for attaching and detaching blades of a wind tunnel test model according to the present invention, Fig. 2 is a horizontal sectional view of the structure shown in Fig. 1, and Fig. 3 is an example of the wind tunnel test model. figure,
Fig. 4 is a diagram showing a conventional method for attaching a wing. In Fig. 99, (1) is a model. (2) is the fuselage, (H) is the long hole, (F) is the wing, (P) is the rectangular convex part, (K) is the pin hole, (3) is the nose, (S)
is a pin. (N) is a screw, and (J) is a pin screw. Note that in FIG. 1, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

[Claims] In a method for attaching and detaching wings of a wind tunnel test model of a flying object having a cylindrical fuselage shape, a fuselage is provided with an elongated hole at the wing attachment position, a pin hole and a screw extending from one end to the elongated hole, and a fuselage that connects the elongated hole with the elongated hole. A wing having a rectangular convex portion that engages with the wing, and a wing having a pin hole in the convex portion, a pin that engages with the fuselage pin hole and the wing pin hole, and a pin screw that has a thread that engages with the screw of the fuselage, A wind tunnel test model characterized in that a wing is fixed by fitting a pin screw into a fuselage and a pin is engaged with a pin hole, and the wing can be removed by removing the pin. How to attach and detach the wings.