Connecting and quick releasing device for test model in wind tunnel

Abstract

The invention relates to the technical field of wind tunnels, in particular to a connecting and quick releasing device for test models in a wind tunnel. The device comprises a stretching base, a drag hook, an air cylinder, a force measuring sensor and a linear guide rail, the force measuring sensor is installed at one end of the stretching base, a through groove is formed in the other end, opposite to the force measuring sensor, of the stretching base, the drag hook is rotatably arranged in the through groove, one end of the drag hook is an object hanging end, the other end of the drag hook is a limiting end, and when a pneumatic control rod stretches into the through groove, the air cylinder is driven by the air cylinder to rotate. The pull hook is located between the limiting end and the groove bottom of the through groove, the limiting end is prevented from rotating towards the groove bottom, the side, close to the groove bottom, of the hanging end is parallel to the groove bottom, the test model is horizontally hung at the hanging end, and when the pneumatic control rod is withdrawn, the pull hook rotates so that the test model can be rapidly released. The device is small in external disturbance force, can ensure that the stress of the test model is free of an inclined included angle, realizes the measurement of the tensile force borne by the test model, can enable the test model to be quickly released and generate vibration, and meets the test requirements.

Description

technical field [0001] The invention relates to the technical field of wind tunnels, in particular to a connection and quick release device of a test model in a wind tunnel. Background technique [0002] The wind tunnel dynamic test needs to study the aerodynamic load, deformation, flow field and other characteristics of the aircraft model in the process of dynamic motion. In some dynamic tests, relevant research measurements need to be carried out under the vibration state of the test model, and the vibration of the test model needs to be induced by external force, and the magnitude of the applied external tensile force needs to be accurately measured, and the applied initiation test needs to be cut off during the vibration process. The influence of the external tensile force of the model vibration on the test model, and the faster the cutting speed, the smaller the impact on the vibration process of the test model, and the more accurate the test results. In this process, i...

AI Technical Summary

Problems solved by technology

At present, there is no mature, standardized, and commercialized model connection and quick release device that can meet the requirements

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