JPS63182539A - Wing attaching and detaching method for wind channel test model - Google Patents

Abstract

PURPOSE:To press pins against connection plates and fix wings to a body by inserting the connection plates of the wings into long holes of a body and engag ing screws provided to one end of the channel body threadably. CONSTITUTION:When the wings 5 (5a-5d) and body 2 are fixed, the pins 9 (9a-9d) are pressed against the tapered connection plates 6 (6a-6d) while the connection plates 6 (6a-6d) are inserted into the long holes 4 (4a-4d), the male screws 8 (8a-8d) are engaged threadably, and the pins 9 are moved forth as shown by an arrow (a) to press the connection plates 6 against the body. Mechanical joining is possible, so the joining strength is large and no heat needs to be applied, so no deformation is caused and the blades are easily replaced.

Description

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

[Conventional technology]

FIG. 3 is an external view of the wind tunnel test model (1), which will be described here in terms of a flying object for convenience. This model (1) is
A hollow cylindrical fuselage (2), four wings (5) attached in the circumferential direction of the fuselage (2), and the fuselage (
2) consists of a nose (31) which is a conical model head attached to one end of the model (2).
1) If a protrusion is provided on the outside, the flow will change in that area, which will affect the test results.

It is common to install a measuring device inside the model (11) fuselage (21) to measure the forces that the flying object receives during flight.Therefore, the inside of the fuselage (2) must be hollow. The wings (5) must be fixed near the outer periphery of the fuselage (2), which imposes restrictions on the method of attaching the wings (5).

Figure 4 is a schematic diagram of how to attach the wing (5) of the conventional wind tunnel test model (1).In Figure 91, (2) is the fuselage, and (5) is the wing.

+61 is a long hole that is formed in the circumferential longitudinal direction of the fuselage (2) and engages with the connecting plate (6) after the connection with the wing (51), and and torso (2)
After connecting the connection plate (61) to the elongated hole (41), use a jig (F) to fix the wing (5) and fuselage (2), and also glue the parts (L).
They were joined by brazing.

[Problems that the invention attempts to solve]

In the conventional joining method, the wings and fuselage are bonded or brazed using pipes as described above, so the strength of the joint between the wings and the fuselage is greatly affected by the working conditions and cannot always be uniform. There was a problem in that it was difficult to guarantee bonding strength. In particular, with regard to brazing, since heat is applied after machining the wings and fuselage, there are problems such as a decrease in machining accuracy due to thermal deformation and deterioration of 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 necessary to change only the wing shape to the same fuselage shape. Occurs frequently. However, in the conventional joining method, the wings and the fuselage were entirely glued or brazed, making it difficult to modify only the wings. Therefore, there was a problem in that the fuselage, which had not been modified in any way, had to be rebuilt.

This invention was made to improve these problems, and provides a method for attaching and detaching the blades of a wind tunnel test model that increases joint strength, avoids deformation due to heating, and allows the blades to be replaced. purpose.

[Solving the problem - means to solve the problem]

The method for attaching and detaching a wing according to the present invention includes a cylindrical body having a long hole in the longitudinal direction of one circumference, a screw hole at one end, and all holes penetrating from the screw hole to the long hole; A wing with a connecting plate that fits into a long hole in the fuselage, and a pin with one end cut in half.

It is equipped with a screw that screws into the screw on the body.

[Effect]

In this invention, by inserting the connecting plate of the wing into the elongated hole of the fuselage and screwing it together with the screw provided at one end of the fuselage,
Press the pin against the connecting plate and securely weigh the wing and fuselage.

〔Example〕

FIG. 1 is an overall configuration diagram of an embodiment of the blade attachment/detachment method according to the present invention. (
4! , f51. (61 A pin (9) that engages with a long hole provided in the body (2) and a tapered portion provided in the connecting plate (6)) A female thread (7) provided in the body (2) and a screw It is composed of a male screw f81 that presses the pin (9) against the connecting plate (61).

FIG. 2 is a cross-sectional view of FIG. 1 taken along a plane including the wings (5b) and wings (5d), and all symbols are the same as in FIG. 1.

In Figure 1, @f51 and the fuselage (2) are fixed by inserting the tapered connection @61 into the long hole (4).

By pressing the pin (9) f connecting plate (6) K and screwing together the male screw (8), advance the pin (9) in the direction of the arrow @) and push the connecting plate f61 against the body (2). Realize by doing things.

〔Effect of the invention〕

As described above, according to the present invention, the wing and the fuselage are joined mechanically by the taper of the connecting plate, so that the joining 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. Furthermore, according to this invention.

If the blade shape is changed due to changes in experimental conditions, only R can be changed.

[Brief explanation of the drawing]

Figure 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, Figure 2 is a horizontal sectional view of the object shown in Figure 1, and Figure 3 is an example of a wind tunnel test model. A diagram showing
Figure 4 shows the conventional method for attaching the wing. In Figure 1, (1) is the model, (2) is the fuselage, (3) is the nose,
(4) is a long hole, (5) is a wing, (6) is a connecting plate, (7) is a set screw, (81 is a male screw, and (9) is a pin. In addition, the same symbols in each figure are the same or equivalent. Show parts.

Claims (1)

[Claims] In the method for attaching and detaching the wings of a wind tunnel test model of a flying object with a cylindrical body shape, a tapered long hole is provided at the wing attachment position, a pin hole is provided in the longitudinal direction of the long hole, and furthermore, at one end of the pin hole. A fuselage provided with a screw, a wing provided with a tapered connecting plate that engages with the elongated hole, a pin that engages with the fuselage pin hole and reaches the connection part of the wing, and a screw that engages with the screw of the fuselage. By screwing the screw into the fuselage, the pin is pressed against the connecting plate of the wing, and the taper of the long hole provided in the fuselage and the taper of the connecting plate provided in the wing are engaged to fix the wing. A method for attaching and detaching a wing of a wind tunnel test model, characterized in that the wing can be removed by removing this pin.