Deep sea ultrasonic driving device based on Helmholtz resonant cavity

Abstract

The invention discloses a deep sea ultrasonic driving device based on a Helmholtz resonant cavity. A piezoelectric element is fixedly connected into the stator component and is of a hollow annular structure, a plurality of vibration blades are arranged on the peripheral face of the excitation ring, and the inner wall of the rotor component is in interference fit with the vibration blades; the fixing assemblies are installed at the two ends of the rotor component and the two ends of the stator component, one end of the rotor component is used for being connected with a driving piece, a hollow Helmholtz liquid resonant cavity is formed in the stator component, and the liquid radial resonant frequency generated by the liquid resonant cavity is far lower than the solid radial resonant frequency. The driving device is simple in structure, the driver works in a liquid cavity resonance mode, the liquid cavity resonance frequency of the driver is far lower than the radial resonance frequency in the deep sea, the Q value at the resonance point is large, the electro-mechanical conversion efficiency is high, the size of the propeller is effectively reduced, the electric energy utilization efficiency is improved, and the application field and range of the ultrasonic motor device are expanded.

Description

technical field [0001] The invention relates to the technical field of design and manufacture of piezoelectric transducers and drivers, in particular to a deep-sea ultrasonic driving device based on a Helmholtz resonant cavity. Background technique [0002] Deep-sea exploration mainly encounters the problem of high water pressure in the deep sea. The deep-sea motors used in the current detectors mainly use the anti-pressure method, and the hydraulic system is mainly used to compensate or balance the high water pressure. This method is not only complex in structure, but also has the risk of marine environmental pollution and propulsion device failure caused by oil leakage and seawater intrusion. Because the piezoelectric transducer can adapt to the high water pressure in the deep sea, it has good and stable working performance in the deep sea. Therefore, the present invention proposes to use the principle of combining the inverse piezoelectric effect and friction drive to con...

AI Technical Summary

Problems solved by technology

At the same time, facing the demand for miniaturization of marine detectors, existing deep-sea AUVs or detectors need smaller drive devices, and the Q (signal quality) value of ordinary radial vibration overflow ring transducers is low, although large Bandwidth work, but the piezoelectric driver needs to work near the resonance point. In order to achieve high electromechanical conversion efficiency, a large Q value is required, which leads to the large size of the existing piezoelectric driver and the large power consumption

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