Constant-pressure water jet cavitation test device

Abstract

The invention discloses a constant-pressure water jet cavitation test device which comprises a water return tank, a constant-pressure variable-frequency water supply device, a pressure tank, a base, a bottom plate, a jet chamber, a nozzle fixing pipe, a jet nozzle, a silicone mat sealing ring, a transparent organic glass plate, a pressing top plate, a sample, a sample fixing pipe and a drainage flange, wherein the transparent organic glass plate is arranged at the upper end face of the jet chamber; the pressing top plate is arranged on the transparent organic glass plate; the bottom plate is arranged at the lower end face of the jet chamber; the bottom plate is arranged on the base; the nozzle fixing pipe and the sample fixing pipe are both arranged on the pipe wall of the jet chamber; the jet nozzle is arranged on the nozzle fixing pipe; the sample is arranged on the sample fixing pipe; the sample oppositely and directly corresponds to the position of the jet nozzle, and the jet nozzle is communicated with the constant-pressure variable-frequency water supply device and a diaphragm pressure cavity. The jet test device disclosed by the invention is compact and reasonable in structure and strong in generality, can be used to flexibly and simply dismantle the sample, and can carry out different cavitation degree tests on a plurality of groups of sample materials by adjusting the jet speed and jet distance.

Description

technical field [0001] The invention belongs to the technical field of cavitation in fluid machinery, and in particular relates to a constant-pressure water jet cavitation device used for material cavitation resistance performance testing, which can realize different jet speeds and jet distances, and can test multiple groups of sample materials. Carry out cavitation test. Background technique [0002] Cavitation erosion refers to the process in which cavitation bubbles collapse to form shock waves or micro jets, which impact the wall surface and cause material damage. At present, with the continuous development of fluid mechanical products such as ships, water turbines, high-speed bearings, fluid pumps, and propellers in the direction of high speed and high power, the problem of micro-jet cavitation has become more prominent. With higher requirements, the research and application of anti-cavitation materials become the key. [0003] The internationally recognized devices f...

AI Technical Summary

Problems solved by technology

The above patents have the following defects: 1) The pressure control valve is often used to adjust the supply pressure of the pump, the adjustment accuracy is poor, it is easy to cause the pressure pulsation in the jet area of ​​the nozzle, and the characterization of the cavitation number is not accurate enough; 2) The material of the jet nozzle is not mentioned, However, ordinary stainless steel nozzles have a short service life during jet cavitation; 3) Cavitation tests cannot be performed on multiple groups of samples at one time, and the efficiency is low; 4) The first two patents mainly simulate the erosion process of seawater or sandy water, and the device is universal The latter two patents use lifting devices to adjust the distance between the nozzle and the sample, making the structure too complicated

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