A device for cavitation jet strengthening on metal surface

Abstract

The invention provides a device for metal surface cavitation jet flow strengthening. The device comprises a lifting device, a three-dimensional moving device, a control system, a water supply system, a spiral cavitation jet flow nozzle, a processing pool and a recovering pool; and the processing pool is located on the lifting device and is communicated with the recovering pool, the spiral cavitation jet flow nozzle is installed on the three-dimensional moving device and located above the processing pool, the water supply system supplies water to the spiral cavitation jet flow nozzle, and the control system controls the lifting device and the three-dimensional moving device to move according to the set program. According to the device, a spiral accelerated runner is used for enabling liquid media to generate the angular spin rate so as to form a vortex, the vortex center pressure of the vortex is reduced to the saturated vapor pressure even negative pressure, a large number of stable vortex vacuoles are induced to be generated, external energy such as lasers do not need to be introduced to generate cavitation vacuoles, and the cavitation generating effect is straightened through the effect of a diffusion angle of a diffusion cavity of the spiral cavitation jet flow nozzle.

Description

technical field [0001] The invention relates to the field of strengthening metal materials, in particular to a device for strengthening the surface of metal materials. Background technique [0002] In some special fields, it is necessary to use high-performance anti-fatigue materials, such as aerospace, automobile or national defense military industry. Research has found that introducing residual compressive stress on the surface can significantly improve the fatigue strength of metal materials. At present, there are many mechanical methods to improve surface properties, such as shot peening, laser shock peening, ultrasonic shot peening, deep rolling and rolling, etc., which can lead to the formation of residual compressive stress on the surface of materials. [0003] Cavitation phenomenon is a very common phenomenon in fluid dynamics, which widely exists in people's daily life, is the root cause of many water conservancy equipment not working properly, and seriously hinders...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current research on cavitation jets on metal surfaces is focused on the design of the nozzle structure and the change of materials after processing. Few literatures have recorded a simple schematic device for cavitation jets on metal surfaces, and this device is only for the surface of metal materials. In the case of a plane, when the metal surface is a curved surface, a good cavitation effect cannot be achieved

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