High Speed ​​Ejection Model Quick Release

Abstract

The invention discloses a high speed ejector model quick release device, including a launching cylinder, a launching mechanism, an opening mechanism and a drive mechanism. The launching mechanism includes a fixing ring and at least two launching claws. Rear ends of the launching claws are pivoted on the outer peripheral wall of the fixing ring. The opening mechanism comprises opening devices of the same number as that of the launching claws. Each opening device includes a strut and an opening spring. One end of each strut is fixed on the outer surface of the launch cylinder. One end of each opening spring is connected with one end of the corresponding strut, and the other end is connected to the front portions of the launching claws. The drive mechanism is connected with the fixing ring and drives the fixing ring to move from an opening at the front portion of the launching cylinder to the outside of the launching cylinder. The invention not only avoids the collision problem between a high speed ejection model and the launching mechanism, eliminates the deformation caused by the rigid collision between parts and improves the stability of a launching system, but also realizes the adjustment of the pitch and yaw rates of the ejector model and improves the reliability of a test mechanism, so that the model launch has a high repeatability.

Description

technical field [0001] The invention relates to the support and launch of a wind tunnel test model, in particular to a quick release device for a high-speed ejection model, which belongs to the field of aerospace engineering. Background technique [0002] Model free-flying wind tunnel test technology is a commonly used research method to study the dynamic aerodynamic characteristics of aircraft, and this type of technology has served model missions many times. The basic method of the test is to fix the free-flying model on the launching mechanism of the scimitar in the sub-span supersonic or hypersonic wind tunnel. After the flow field is stable, the model is ejected at high speed against the direction of the airflow. The model will fly in a short time. Free flight in the wind tunnel. At this time, high-speed photography is used to shoot the model through the observation window, and the attitude track of the free flight of the aircraft model can be obtained. After data proce...

AI Technical Summary

Problems solved by technology

The design of the original mechanism does not conform to the scientific principles. At the same time, there are problems such as short action time and insufficient inertia moment. As a result, the launching claws of the original launching mechanism collide with the model very easily, causing the test to fail.

This has become a difficult problem that the original institution cannot overcome, and the test institution must improve

[0006] 2) Rigid impacts lead to deformation of parts and poor mechanism stability

Every time the model of the original mechanism is launched, the steel piston will rigidly collide with the front pad of the copper cylinder to achieve the purpose of deceleration. Interference occurs, the piston movement resistance becomes larger, or even stuck, which leads to poor stability of the mechanism, lower model launch efficiency, and extremely inconvenient use, which needs to be improved

[0007] 3) The launch attitude of the model is single, which cannot meet the task requirements of more models

The original mechanism can only eject the model forward according to a fixed attitude angle, and more and more model tasks require the model not only to have a certain initial angle but also to have a certain angular velocity during the free flight process, while the original mechanism Cannot meet this goal, needs improvement

[0008] 4) The repeatability of the launch speed of the model is not high, which affects the test results, and the piston rod of the main cylinder will appear to have insufficient stamina even under the condition of high air source pressure. The original mechanism needs to be improved

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