a water-cooled balance

Abstract

The invention discloses a water-cooled balance, which comprises a rod-type balance and a water-cooling jacket. The inside of the rod-type balance is provided with two water-through pipes, and the two ends of the water-through pipes are respectively arranged on two end faces of the rod-type balance; An adapter is provided between the water-cooling jacket and the rod-type balance, and the adapter is fixed on one end face of the rod-type balance by screws. One end of the road corresponds to the position of the two water pipes on the end face of the rod balance, and the other end of the water inlet and outlet transfer pipe is connected to the water inlet and water outlet of the water cooling jacket. The invention overcomes the defects of large resistance measurement error of the bellows water-cooled balance, inconvenient installation and use, and easy damage and water leakage of the bellows. In addition, due to the removal of bellows-related devices, the length of the balance is shortened and the diameter is increased, which greatly improves the stiffness and cooling effect of the balance, reduces the temperature effect, and significantly reduces the measurement uncertainty.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic measurement of aerospace force measurement test, in particular to the use of a water-cooling system cooling rod-type balance to perform accurate six-component aerodynamic measurement of a hypersonic aircraft model during a wind tunnel force measurement test of a hypersonic aircraft model. The most important measuring device in force testing. Background technique [0002] The balance is the core mechanical measurement equipment used to measure the aerodynamic load of the model in the wind tunnel test. The Wheatstone bridge composed of strain gauges pasted on the surface of the measuring element converts the deformation of the measuring element caused by the aerodynamic load into a voltage signal. The corresponding matrix of the voltage signal and force and moment obtained by calibration is used to calculate the aerodynamic force acting on the test model. [0003] In the hypersonic wind tunnel ...

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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