A coupling structure of tail support device strut and rod balance in wind tunnel test

Abstract

The invention is applicable to the technical field of wind tunnel tests, and in particular relates to a coupling structure of a tail support device pole and a rod-type balance for wind tunnel tests, including a balance coupling end, a pole coupling end, a locking ring, and a locking nut. The coupling end is positioned with the stop of the locking ring and connected with the cylindrical surface, the locking ring is connected with the conical surface of the coupling end of the strut, and the differential lock nut is threadedly connected with the locking ring and the coupling end of the strut respectively. The invention can realize the accurate positioning of the rod balance on the support rod of the tail support device in the wind tunnel test, and can adjust the roll angle of the rod balance according to the needs, and solves the problem of the rod caused by the commonly used conical surface + wedge key connection mode at present. The problem that the roll angle of the type balance on the support rod cannot be adjusted improves the position accuracy of the connection between the rod type balance and the support rod of the tail support device, especially the accuracy of the roll direction around the balance, so as to better ensure the wind tunnel force test Accuracy and Reliability of Data.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests, in particular to a connection structure of a tail support device pole and a rod-type balance for wind tunnel tests. Background technique [0002] As one of the three basic means of aerodynamic research, wind tunnel test fixes aircraft models such as airplanes made according to the similarity criterion in the internal flow field of the wind tunnel test section through support devices, and uses the principle of relative motion to make artificial air flow Through the test model, various sensors are used to measure the influence of airflow on the test model to understand the aerodynamic characteristics of aircraft and other aircraft. During the wind tunnel test, the supporting device can fix the position and attitude of the model in the wind tunnel test section, and can control the change of the position and attitude of the model according to the agreed method, and the error of the position...

AI Technical Summary

Problems solved by technology

However, the nonlinearity of the elastic deformation of the tail support device under the action of the aerodynamic load will make the correction very complicated and difficult to obtain accurately, thus adversely affecting the accuracy and reliability of the aerodynamic load measurement of the model

In addition, the taper surface is used. The machining accuracy of the rod and rod balance with the taper surface is high. The two surfaces must be matched to achieve a contact area of ​​more than 75%. If the contact area is low, the coupling stiffness will be greatly reduced. It is easy to loosen and shake during the test, which will also adversely affect the test results and safety

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