Compound large-resistance wind-tunnel strain balance

Abstract

The invention discloses a compound large-resistance wind-tunnel strain balance which comprises a compound loop balance and a supporting rod. The compound loop balance comprises a free end transition section, a #2 supporting section, a #1 supporting section, a fixed end transition section and a supporting rod connecting section; the supporting rod comprises a cone-shaped connecting section and an equal straight section; the free end transition section is connected to the #2 supporting section through four-column beams (a side force, pitch moment and rolling torque measuring element) on the left and right sides; the fixed end transition section is connected to the #1 supporting section through two-column beams (a lift force and yawing moment measuring element) on the upper and lower sides; the #1 supporting section and the #2 supporting section are connected through a four-column beam (a resistance measuring element) on the inner side; and the supporting rod connecting section is connected to the cone-shaped connecting section of the supporting rod. According to the invention, the balance length is shortened, the diameter of the balance is increased, the carrying capacity of the balance is improved, the testing safety is improved, and the service life of the balance is prolonged.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic force measurement in aerospace dynamometer experiments, especially for the problem of force measurement of aerodynamic models with large lift-drag ratios such as reentry cabins and landers. The circuit structure is compact and the measurement components are arranged, the length of the balance is shortened, the diameter of the balance is increased, the bearing capacity of the resistance element of the balance and the overall rigidity of the balance are improved, and the aerodynamic force of the six components of the model can be better measured. Background technique [0002] When it comes to the aerodynamic measurement of models with large lift-to-drag ratios such as return capsules and landers, due to the large diameter and short length of the models, the resistance load to be measured is often about ten times the lift load, and the load matching It is difficult and requires high measurement a...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a compound large-resistance wind tunnel strain balance, which aims to solve the difficulty of installing the balance in the aerodynamic measurement of the traditional three-section series rod balance in the return cabin, lander and other models. , Insufficient resistance bearing capacity and the design of the balance did not make full use of the cavity space of the model, providing a compound circuit wind tunnel strain balance and support rod, and completed the accurate measurement of the six components of the model's aerodynamic load

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