A low-speed wind tunnel model test support device based on internal balance

Abstract

The invention discloses a support device for a low-speed wind tunnel model test based on an internal balance, which includes a support rod, and the connecting head of the support rod is a U-shaped structure with an upward opening, and two vertical sides of the U-shaped structure Cylindrical pin holes are respectively provided, and a transition piece is provided in the U-shaped structure, and the transition piece is a cylindrical structure with an opening at one end and a flange structure at the other end, and a cylindrical pin hole is provided on the side of the transition piece , the cylindrical pin passes through the U-shaped structure and the cylindrical hole on the transition piece in turn to fix the transition piece in the U-shaped structure. Adopting the structure of the present invention can satisfy both the use of the internal balance and the use of the external balance. In the wind tunnel test, a set of supporting devices can meet the test requirements of different needs, and there is no need to replace the support due to use during the test. device.

Description

technical field [0001] The invention relates to the field of wind tunnel tests, in particular to a support device for low-speed wind tunnel model tests based on internal balances. Background technique [0002] The 4m×3m wind tunnel is used as the main supporting device for conventional force testing of transport aircraft. It is a single-point (or two-point) supporting device designed based on a tower-type six-component mechanical strain balance. However, according to the needs of the expansion of new aircraft wind tunnel test tasks, the internal balance technology is being developed to form a conventional force measurement test capability that complements the internal and external balances. However, the main part of the existing single-point (or two-point) support device - the support rod is designed and manufactured for the external balance, which cannot meet the test requirements of the internal balance, because the interfaces of the two are completely different. The supp...

AI Technical Summary

Problems solved by technology

However, the main part of the existing single-point (or two-point) support device - the support rod is designed and manufactured for the external balance, which cannot meet the test requirements of the internal balance, because the interfaces of the two are completely different

The support rod based on the external balance and the hollow design connecting plate inside the model are fixed with the main cylindrical pin, so the head is designed as a square (see figure 1 , figure 2 ); and the support rod based on the internal balance is connected with the balance installed inside the model. Due to the limitation of the volume, strength and rigidity, the balance cannot be made hollow, so the original support rod cannot be applied to the internal model. on the balance

Images