Array type ultrasonic dynamic sealing device and method
A sealing device and array technology, which is applied to the sealing of engines, engine components, mechanical equipment, etc., can solve the problems of not very severe sound pressure changes and unsatisfactory sealing effects, and achieve good results, convenient structure and assembly, and reduced The effect of wear and tear
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[0035] An array type ultrasonic dynamic sealing device of the present invention, the backing 6 is formed by hot pressing after fully mixing tungsten powder and epoxy resin, the particle size of the tungsten powder is 5 μm, and the volume fraction is 15%; the outer side of the backing 6 is in contact with the T-shaped groove, Fixed in the sealing sleeve 8 through the T-shaped groove;
[0036] Acoustoelectric chip belt 5 is made up of rectangular PZT piezoelectric ceramic sheet, and the thickness of piezoelectric ceramic sheet is 1 / 2 wavelength when ultrasonic wave propagates in it.
[0037] The matching layer 4 is made of low-viscosity epoxy resin filled with alumina in a single layer, the particle size of alumina powder is 2.5 μm, and the volume fraction is 25%. The filler and the base material are cast into a thin layer by casting. 1 / 4 wavelength when layer 4 propagates; acoustic lens 3 is made of polymethyl methacrylate (PMMA).
[0038] Four radial sealing teeth 10 are even...
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