Device and method for cavitation jet flow reinforcement of shaft parts

Abstract

The invention provides a device and method for cavitation jet flow reinforcement of shaft parts. The device comprises a workpiece processing system, a high-pressure water supply system, a low-pressure water supply system, a reservoir and a nozzle device. The nozzle device is of a T-shaped structure, a through hole is formed in the central axis of the nozzle device, annular flow channels which communicate with high-pressure water holes are formed in the outer side of the through hole, a plurality of contraction flow channel layers uniformly distributed are arranged on the inner wall of the nozzle device, the contraction flow channel layers are provided with contraction flow channels uniformly distributed along the circumference, and the contraction flow channels communicate with the through hole and the annular flow channels. According to the device and the method, high-pressure water and low-pressure water are supplied to the annular flow channels and the through hole respectively, the contraction flow channels are made to generate cavitation bubbles, the surfaces of the shaft parts are reinforced by local ultrahigh pressure and high-strength shock waves generated when the cavitation bubble are collapsed, and external energy is prevented from being introduced so as to achieve the cavitation effect compared with laser cavitation reinforcement. The whole device system is simple in structure and beneficial to rapid reinforcement of long shaft parts.

Description

technical field [0001] The invention relates to a device and method for cavitation of shaft parts, in particular to a device and method for cavitation jet strengthening of shaft parts. Background technique [0002] Cavitation is a special phenomenon in fluid dynamics and a long-standing problem in the field of hydraulic machinery. When the partial pressure inside the liquid is reduced to the saturated vapor pressure or even negative value, a cavity will be formed inside the liquid and at the interface between solid and liquid. This phenomenon is usually called cavitation. With the continuous expansion and deepening of the research field, the phenomenon of cavitation caused by cavitation has been found in water pumps and water turbines, and cavitation damage has also appeared in the drainage structures of high dams. How to make reasonable use of cavitation phenomenon to serve social production has always been a concern of scientific researchers. [0003] As the core compone...

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Problems solved by technology

However, there is no device in the prior art that uses cavitation jet strengthening to perform surface strengthening treatment on materials.

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