Wind tunnel metal diaphragm clamping device

Abstract

The invention relates to the technical field of wind tunnel equipment, in particular to a wind tunnel metal diaphragm clamping device. According to the wind tunnel metal diaphragm clamping device, the relative position change of a first pipe section and a second pipe section is achieved through cooperation of a step face, a pull rod, a limiting nut and an arc-shaped long hole, so that the state switching of loosening and clamping of the metal diaphragm is achieved, the pull force of the electric cylinder is amplified through cooperation of the electric cylinder and the labor-saving lever and the lever effect, the clamping force needed by clamping the metal diaphragm is met, the movable ejector block is utilized to adapt to the change of the loading action point of the labor-saving lever, the pulling force of the electric cylinder is amplified through the lever action, existing hydraulic equipment is replaced, the reliability of the metal diaphragm clamping device is improved, the manufacturing cost of the metal diaphragm clamping device is reduced, the convenience of clamping and replacing the metal diaphragm is improved, and then the operation efficiency of a wind tunnel is improved.

Description

technical field [0001] The invention relates to the technical field of wind tunnel equipment, in particular to a wind tunnel metal diaphragm clamping device. Background technique [0002] In the pulse wind tunnel equipment that simulates hypersonic airflow on the ground, such as shock wave wind tunnel and expansion pipe wind tunnel, between appropriate pipe sections, it is necessary to set up a valve that can seal reliably and can be fully opened quickly, usually using a metal diaphragm ( Unbroken) as a closed valve, separates different sections of the wind tunnel, applies pressure to the metal diaphragm when needed, and quickly breaks the metal diaphragm to achieve the effect of quickly and completely opening and connecting different sections of the wind tunnel. The metal diaphragm is generally set between two pipes through a film ring, and in order to meet the sealing requirements, the general engineering application wind tunnel equipment requires a clamping force of the o...

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Problems solved by technology

[0003] At present, the commonly used wind tunnel metal diaphragm clamping device has a hydraulic clamping mechanism, which uses the pressure of hydraulic oil to clamp the diaphragm. The advantage is that the device is simple and the diaphragm clamping force is large; the disadvantage is that the size of the hydraulic clamping mechanism is very small. Large, inconvenient to manufacture and use, which limits its application in large-scale equipment. At the same time, oil leakage often occurs in the sealing structure of active parts, which reduces reliability and pollutes the use environment. What's more, oil leakage will It will lead to insufficient clamping force, which will bring safety risks and hidden dangers of air leakage. In order to maintain the hydraulic clamping mechanism, it is necessary to disassemble the hydraulic clamping mechanism for maintenance. In a very crowded laboratory site, it is extremely difficult to disassemble and maintain. , in addition to increasing the cost of the experiment, it also seriously affects the progress of the experiment; it is difficult to provide the clamping force that meets the sealing requirements by replacing the existing hydraulic equipment with small hydraulic equipment or electric cylinders and other force-applying equipment

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