Six-component ring type wind tunnel balance

Abstract

The invention discloses a six-component ring type wind tunnel balance. The balance comprises a balance resistance measuring section, one side of the balance resistance measuring section is provided with a balance cantilever connecting section used for connecting a force measuring model or part; a balance fixed connection section is arranged on the other side of the balance resistance measurement section, a balance front measurement section used for measuring force is arranged between the balance resistance measurement section and the balance cantilever connection section, and a balance rear measurement section used for measuring force is arranged between the balance resistance measurement section and the balance fixed connection section. According to the invention, the limitation of a traditional rod-type wind tunnel balance structure is broken through; a four-face symmetrical structure is adopted, the stress deformation symmetry is good, the anti-interference capacity is high, the bending moment bearing capacity and the temperature characteristic are high, deformation is smaller, the strength is higher, the measurement accuracy is higher under the same output condition, the wind tunnel test quality can be improved, and the engineering application value is high.

Description

technical field [0001] The invention relates to the technical field of wind tunnel test model resistance measurement, in particular to a six-component ring type wind tunnel balance. Background technique [0002] The wind tunnel balance (referred to as the balance) is the key measuring device in the wind tunnel force test, which is used to measure the magnitude, direction and action point of the aerodynamic load (force and moment) acting on the model. When involving jets, propellers, etc., which require central ventilation or installation of rotating shafts, due to the limitation of model space, the balance can only use a ring structure. The traditional six-component ring wind tunnel balance is formed by punching holes on the basis of conventional balances. It adopts a multi-section series rod structure. The balance structure is asymmetrical. When the size of the middle hole of the balance is large, the rigidity of the upper and lower ends of the balance has a large differenc...

AI Technical Summary

Problems solved by technology

The traditional six-component ring wind tunnel balance is formed by punching holes on the basis of conventional balances. It adopts a multi-section series rod structure, and the balance structure is asymmetrical. When the size of the middle hole of the balance is large, the rigidity of the upper and lower ends of the balance has a large difference. , when the balance is under load, the deformation of the balance measuring element is asymmetrical, and the local stress is large, resulting in a large overall deformation of the balance, low strength, large interference load from other components, and there are certain problems such as positive and negative force asymmetry, which affect the test. Force measurement accuracy

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