Improved wind tunnel test mechanism for model placement and separation

Abstract

The invention provides a model release and separation improved type wind tunnel testing mechanism. Bullet grooves (1-1) are symmetrically designed in a parent shell (1) along an axial direction, and bullets (2) are placed in the bullet grooves (1-1); a spring blind hole (1-2) is formed in each bullet groove along a radial direction of the parent shell, a tightening block groove is designed in theparent shell in the axial direction and is perpendicular to the axial directions of the spring blind holes, and a binding rope through hole (1-3) is formed in the bottom of each spring blind hole (1-2) and penetrates through the tightening block groove; a tightening block (4) is placed in each tightening block groove, and a draw-in bolt through hole (1-5) is formed in the bottom of each tighteningblock groove; a spring (3) is positioned in each spring blind hole (1-2), a binding rope (6) penetrates through each binding rope through hole (1-3) and the tightening block (4), and a draw-in bolt (9) penetrates through the bolt through hole and is in screwed connection with the tightening block; the depth of the tightening block in the tightening block groove is adjusted through the draw-in bolt (9), and thus, the bullets can be adjusted to preset mounting positions by the binding ropes (6); and a left cover plate (7) is tightly pressed on the outer end surface of the draw-in bolt (9), a right cover plate (8) is mounted on the outer end surface of the tightening block groove, and the geometric profile of the parent shell is ensured by the left cover plate (7) and the right cover plate (8).

Description

technical field [0001] The invention relates to the support and release of a wind tunnel test model, in particular to an improved wind tunnel test mechanism with separated model release, which belongs to the field of aerospace engineering. Background technique [0002] The release separation test is a special wind tunnel test, and the more common one should be the submunition separation test. The lethality of submunitions largely depends on the dispensing effect of bullets. How to effectively distribute bullets so that they can reach the preset distribution position is an important link in the development of submunitions. [0003] In the past, the problems existing in the free-flying separation test devices of sub-cluster bombs and even the drop-in separation test devices are as follows: [0004] (1) Due to technical defects in the past, after the model is installed, it will deviate from the pre-installed position, resulting in unreliable test data. The previous test setu...

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Problems solved by technology

This kind of problem becomes particularly prominent in the shell ejection test. The normal shell is completely consistent with the shape of the model and is excessively smooth. However, the previous test technology must cause the rope to become longer, and the longer rope will inevitably lead to the joint between the shell and the model. The boss or even the entire shell protrudes from the outside of the model, which will lead to the unreliability of the test data, the test cannot be carried out, and even the project cannot be accepted in the end

This defect is fatal and must be improved on previous test institutions

[0005] (2) The binding rope passes through the inside of the bullet or shell, and the rope hinders the free movement of the model for a long time during the separation process

The ideal situation for unlocking is that the thicker rope breaks the left and right binding ropes at the same time, but this is often not the case in real situations, but only one is broken and the other is pulled out from the model hole. There must be friction resistance when pulling out, which affects Normal free movement of bullets or casings, causing test data to be unreliable

[0006] (3) The knot interferes with the movement of the bullet or shell, affecting its separation trajectory, resulting in unreliable test data

In the past, the test institutions used a thicker rope to break the binding rope, but there must be knots in the binding rope, and the bullets or shell pieces are symmetrically distributed up and down. Holes and bullets or shells through holes, thus hindering the free separation of bullets or shells, affecting their separation trajectory, resulting in unreliable test data

[0007] (4) Completely manual installation is time-consuming and laborious, and the installation effect is not good

[0008] (5) The unlocking device is clumsy, and the unlocking failure rate is high

In the past, a thicker rope was used to break a thinner rope in the previous test scheme. Although the principle is simple, there is still a possibility of failure. Failure of the test will waste a lot of manpower and material resources, especially the precious test model, so the unlocking device needs to be improved.

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