End surface driving film clamping device

Abstract

The invention discloses an end surface driving film clamping device. A driving section and a rotary nut of the film clamping device are integrated into a whole and serve as a left side section; a filmclamping ring, a transition nut, a driven section, a trunnion, a double-lug support, a single-lug support and an oil cylinder are integrated into a whole and serve as a right side section; a cuttinggroove, with uniform cutting internal threads, of the rotary nut corresponds to a part, in which threads are not removed, of the transition nut with the uniform cutting external threads; and the oil cylinder drives the transition nut to rotate relative to the driven section and the rotary nut, the driven section is driven to move close to the driving section, so that a film and the film clamping ring are clamped. The film clamping ring comprises the trunnion, the double-lug support, the single-lug support and the driving device of the oil cylinder which are all installed in the end surface ofthe rotary nut, and the occupied radial space is reduced. The end surface driving film clamping device can provide enough clamping force for the film of shock tunnel type ground test equipment, and isparticularly suitable for the conditions that the caliber of a shock tube is large, requirement for the clamping force is high, and the space in the circumferential direction is limited.

Description

technical field [0001] The invention belongs to the technical field of hypersonic testing equipment, and in particular relates to an end-face-driven clamping device. Background technique [0002] Pulse-type test equipment such as shock wave wind tunnel is an essential key equipment for ultra-high-speed ground simulation tests. This type of equipment has a common feature: before the test, it is necessary to use a metal diaphragm to divide the shock tube into several pipe sections, and fill different pipe sections with gases of different pressures, and then take measures to rupture the membrane during the test to complete the test. Therefore, it is necessary to design a device between different sections of the shock tube to ensure the clamping and sealing of the diaphragm, which is the clamping device. [0003] The cut thread clamping device and the full thread clamping device are two commonly used thread clamping methods. The clamping principle of the cut-off thread clampin...

AI Technical Summary

Problems solved by technology

The thread clamping device has the advantages of a wide range of applicable wind tunnel diameters and a small volume of the clamping device body. However, the driving cylinders of the current thread clamping device are installed on both sides of the rotary nut, driving the rotary nut to rotate tangentially, and driving The radial space occupied by the device is large

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