Film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking

Abstract

A film clamping device for double-film pressure-fixed film breaking and single-film impact film breaking relates to the field of high-supersonic-speed shock-wave wind tunnel engineering. The fill clamping device a levorotatory screw, a Laval nozzle, an open-mounted nut, a first adjusting ring and a gas vent; a through hole is arranged horizontally in the middle portion of the open-mouthed nut; the first adjusting ring is vertically and fixedly mounted at one end of the through hole of the open-mounted nut; the Laval nozzle is fixedly mounted in the external surface of the first adjusting ring along the axial direction of the through hole of the open-mounted nut; the levorotatory screw is fixedly mounted in the external surface of the first adjusting ring along the axial direction of the through hole of the open-mounted nut, and wraps the Laval nozzle; and the gas vent is arranged in the top of the open-mounted nut along the vertical direction, and is communicated with the upper surface of the open-mounted nut and the through hole in the middle of the open-mounted nut. Energy is transmitted from one end to the other end of a film rapidly during operation of a wind tunnel in a film breaking manner, especially the film clamping device can realize double-film pressure-fixed film breaking and single-film impact film breaking, and thus, different conditions of wind tunnel operation can be met at the same time.

Description

technical field [0001] The invention relates to the field of hypersonic shock wave wind tunnel engineering, in particular to a membrane clamping device that can be used for double-membrane constant-pressure membrane rupture and single-membrane impact membrane rupture. Background technique [0002] During the operation of the wind tunnel, the clamping device is an important device that quickly transmits energy from one end of the diaphragm to the other through the instantaneous rupture of the membrane. It has been continuously developed and innovated for decades. At present, the membrane clamping devices used in wind tunnel operation are mainly divided into two types: double-diaphragm constant-pressure membrane rupture devices and single-membrane impact membrane rupture devices. The above two membrane breaking devices have their own characteristics, and different membrane clamping devices are used to meet different operating requirements in response to the operating condition...

AI Technical Summary

Problems solved by technology

At present, in order to meet the requirements of different working conditions of the wind tunnel during the wind tunnel test, it is necessary to replace the two clamping devices repeatedly, which makes the operation of the wind tunnel cumbersome and reduces the efficiency of the wind tunnel.

At the same time, there is no effective solution to the problem of airflow impact caused by the difference in inner diameter between the front and rear ends of the clamping mechanism.

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