A support device for wind tunnel test of automobile model

Abstract

The invention discloses a car model air tunnel test support device, including a positioning support pillar of a support car model, the positioning support pillar is an extendable structure, the top end of the positioning support pillar through a joint component with at least two rotation degrees of freedom is connected with the bottom of the car model, the joint component is provided at the location close to a side skirt at the bottom of the car model. The positioning support pillar through the joint component is connected with the car model, through the joint component can adjust the elevation angle and the heel angle of a car, meanwhile the degrees of freedom of the joint component also can adapt to the internal stress of the positioning support pillar in the installation process, avoid affecting the test results, the device has the advantages of being simple in installation, convenient to adjust, broad in test scope and accurate in test structure.

Description

technical field [0001] The invention belongs to the technical field of automobile testing, and in particular relates to a supporting device for wind tunnel testing of automobile models. Background technique [0002] The support mechanism of the original car model wind tunnel dynamometer balance support system is a four-wheel alignment support mechanism, such as figure 1 and figure 2 As shown, after the upper ends of the four positioning support columns 3 pass through the balance turntable 2, they are respectively aligned and inserted into the pre-drilled positioning holes at the bottom of the four wheels 11 of the car model 1, and the lower ends of the positioning support columns 3 are connected with the balance column 4 through threads. Realize the positioning and fixing of the car model 1; the balance column 4 is connected with the wheel and wheelbase adjustment device (not shown in the figure) of the balance force measuring system; the wheel and wheelbase adjustment dev...

AI Technical Summary

Problems solved by technology

[0004] ①The car roll test is not easy to operate, the car model cannot be opened, and it is inconvenient to arrange the roll hose every time it rolls

[0005] ②It is difficult to install the car model, and the strut assembly has internal stress: the diameter of the hole at the bottom of the wheel is only 2cm, which not only causes some difficulties in the installation of the model, but also causes the positioning support column 3 to have an included angle with the vertical direction due to installation errors, resulting in the positioning of the support column. The internal stress of the car model has an impact on the experimental results

[0006] ③It is difficult to ensure the level of the car model. When the depth of the pre-drilled holes at the bottom of the wheel is inconsistent, it will cause the installation error of the pitch angle and roll angle of the car model, which will affect the experimental results

[0007] ④The attitude of the car model is not adjustable, and the support method at the bottom of the wheel makes the pitch angle and roll angle of the model not adjustable, which makes the test simplistic

[0008] ⑤ The wheel rotation test cannot be carried out, and the support installation of the car model sacrifices the degree of freedom of the wheel, making the test simplistic

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