Water cooling balance

Abstract

The invention discloses a water cooling balance which comprises a rod-type balance and a water-cooled jacket. Two water flow pipelines are arranged in the rod-type balance. The two ends of each water flow pipeline are arranged on the two end faces of the rod-type balance respectively. A switching joint is arranged between the water-cooled jacket and the rod-type balance and fixed to one end face of the rod-type balance through a screw. A water inlet switching pipeline and a water outlet switching pipeline are arranged on the switching joint. One end of the water inlet switching pipeline and one end of the water outlet switching pipeline correspond to openings of the two water flow pipelines on the end faces of the rod-type balance in position and the other end of the water inlet switching pipeline and the other end of the water outlet switching pipeline correspond to a water inlet and a water outlet of the water-cooled jacket in position. The defects that a corrugated pipe type water cooling balance is large in drag measurement error and inconvenient to install and use and a corrugated pipe is prone to being damaged and leaking water are overcome. In addition, due to the fact that corrugated pipe related devices are omitted, the length of the balance is reduced, the diameter of the balance is increased, the rigidity and the cooling effect of the balance are greatly improved, the temperature effect is reduced, and measurement uncertainty is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic force measurement for aerospace dynamometer tests, in particular, during the wind tunnel dynamometer test of a hypersonic vehicle model, the precise six-component aerodynamic measurement of the hypersonic vehicle model is carried out by using a water-cooling system cooling rod balance, which is a hypersonic vehicle model. The most important measuring equipment in force testing. Background technique [0002] The balance is the core mechanical measurement equipment used to measure the aerodynamic load on the model in the wind tunnel test. The Wheatstone bridge composed of strain gauges pasted on the surface of the measuring element is used to convert the deformation of the measuring element caused by the aerodynamic load into a voltage signal. The corresponding matrix of voltage signal and force and torque obtained by calibration is calculated to obtain the aerodynamic force acting on the test m...

AI Technical Summary

Problems solved by technology

Because the bellows connects the balance element and the support rod, the influence of bellows rigidity, water pressure and assembly on the resistance measurement data cannot be eliminated, and the wind tunnel test may cause damage and water leakage due to vibration, and its structure is complex, reducing The diameter of the balance is increased, the length of the balance is increased, and the rigidity of the balance is reduced, which seriously affects the long-term stability and service life of the water-cooled balance.

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