A multi-degree-of-freedom support mechanism for a high-speed wind tunnel

By designing a multi-degree of freedom support mechanism for high-speed wind tunnels, using a full-scisor three-degree of freedom mechanism and hollow motor rolling assembly, the problems of biased load and poor load-bearing capacity of the existing support mechanism are solved, and efficient and symmetrical aerodynamic test is achieved.

CN119309767BActive Publication Date: 2025-03-28INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Patent Information

Application Number
CN202411864303.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-18
Publication Date
2025-03-28
Estimated Expiration
2044-12-18

AI Technical Summary

Technical Problem

The existing high-speed wind tunnel model support mechanism has a bias load problem in aerodynamic tests, which affects the symmetry and stability of the model and flow field, and has poor load-bearing capacity and low test efficiency.

Method used

A high-speed wind tunnel multi-degree of freedom support mechanism is designed, including the main load-bearing skeleton, side sliding assembly, angle of attack assembly and rolling assembly. It adopts a full scimitar three-degree of freedom mechanism to realize rolling motion through a hollow motor and a rolling bracket to improve the stiffness and symmetry of the overall structure.

Benefits of technology

The continuous free movement of the model in the angle of attack, side slip and rolling directions is achieved, the test efficiency is improved, the stiffness and airflow symmetry of the support mechanism are enhanced, and the impact of electromagnetic interference on the sensor is reduced.

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Abstract

The invention discloses a high-speed wind tunnel multi-degree-of-freedom support mechanism, including a main load-bearing frame, a side-slip assembly rotating along a vertical axis on the main load-bearing frame, an angle-of-attack assembly rotating along a transverse horizontal axis on the side-slip assembly, a roll assembly rotating along a longitudinal horizontal axis on the angle-of-attack assembly, and a model placement position on the roll assembly. Beneficial effects of the invention: a full scimitar three-degree-of-freedom mechanism is adopted, which is divided into free movements in three directions of angle of attack, side-slip, and roll, and the three postures required by the model can be continuously changed. The full scimitar arrangement is adopted, which can improve the rigidity of the entire support mechanism, the airflow has good symmetry up and down, and can realize the up and down routing of strong and weak electricity, and reduce the influence of electromagnetic interference on the data of high-precision measurement equipment of sensors such as balance.
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