Venturi tube cavitation online monitoring device based on triboelectrification and electrostatic induction
A technology of electrostatic induction and friction electrification, which is applied in the direction of measuring devices, testing of machines/structural components, instruments, etc., can solve the problems of low reliability, inability to monitor real-time, limitations of cavitation monitoring, etc., to prevent cavitation, The effect of simple structure and convenient operation
Pending Publication Date: 2021-03-09
DALIAN MARITIME UNIVERSITY
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Problems solved by technology
In order to solve the limitations of existing cavitation monitoring, the inability to monitor in real time and the problems of low reliability
Method used
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[0024] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0025] Such as figure 1 As shown, the present invention provides a Venturi tube cavitation online monitoring device based on triboelectrification and electrostatic induction, including a triboelectric nanogenerator, an A / D converter, a single-chip microcomputer and a computer.
[0026] Frictional nanogenerator, the frictional nanogenerator is arranged in the expansion part of the Venturi tube, used to generate electrical signals in response to the vibration of the Venturi tube, the frictional nanogenerator includes a support structure 2, the support The lower part of the structure 2 is set to be able to adapt to and accommodate the groove structure in the shape of the expansion part of the Ventu...
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The invention provides a venturi tube cavitation on-line monitoring device based on triboelectrification and electrostatic induction. The venturi tube cavitation on-line monitoring device comprises atriboelectrification nanometer generator, an A / D converter, a single-chip microcomputer and a computer. The friction nano-generator is arranged on an expansion part of a Venturi tube and used for responding to vibration of the Venturi tube to generate an electric signal, the friction nano-generator comprises a supporting structure, the lower portion of the supporting structure is arranged to be capable of adapting to and containing a shape groove structure of the expansion part of the Venturi tube, and the upper portion of the supporting structure is arranged to be capable of adapting to and containing the shape groove structure of the expansion part. A wedge-shaped groove is engraved in the upper portion of the supporting structure in a concave mode, the bottom face of the wedge-shaped groove is horizontally arranged, a special-shaped electrode is arranged on the wedge-shaped groove, the special-shaped electrode limits the bottom face of the wedge-shaped groove into an electrode areaand a non-electrode area which are arranged at intervals, and meanwhile balls are arranged in the wedge-shaped groove and roll in the electrode area and the non-electrode area. The device is simple instructure and convenient to operate, and the cavitation degree can be monitored in real time without damaging equipment.
Description
technical field [0001] The invention relates to the technical field of cavitation on-line monitoring, in particular to a Venturi tube cavitation on-line monitoring device based on friction electrification and electrostatic induction. Background technique [0002] Hydrodynamic cavitation is the rapid formation and collapse of gas bubbles in a fluid when the fluid pressure changes. Cavitation can cause material erosion, reduce equipment efficiency, and generate hazards such as vibration and noise, so it should be avoided as much as possible. [0003] The cavitation "hot spot effect" is huge in energy and can be exploited with appropriate methods. The degree to which cavitation occurs is critical in practical applications. If the degree of cavitation is too low, the expected effect cannot be achieved, and if the degree of cavitation is too high, it will increase energy consumption and damage equipment, so it is necessary to monitor the degree of cavitation. [0004] At prese...
Claims
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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 宋立国杨金刚潘新祥徐敏义刘奇陈天予孟春阳
Owner DALIAN MARITIME UNIVERSITY