A Pulse Nozzle Based on Air Resonance

Abstract

The invention belongs to the technical field of water jet cutting and washout pulsejet nozzles and particularly relates to a pulsejet nozzle based on harmonic air vibration. The pulsejet nozzle based on harmonic air vibration comprises a base provided with a fluid channel, wherein the base is located at the outlet end of the fluid channel and is detachably connected with a spray head, the outside of the spray head is covered with a cover, and an outflow hole is formed in the position corresponding to the spray head in the cover. A cavity provided with an air inlet is formed between the cover and the base, the cavity is communicated with the outside through the air inlet and the outflow hole, and a plugging mechanism is arranged at the air inlet. The pulsejet nozzle is simple in structure, easy to machine and ingenious in design and has no special requirement for the internal structure of the jet nozzle. Compared with the mainstream prior art, another way is opened: the air pressure in the jet flow cavity is regulated by combining the entrainment effect produced by a high-speed jet flow with air circulation control, further a pulse flow fixed in frequency is formed, the jet nozzle machining difficulty is reduced, and the frequency stability of the pulse jet flow and obvious prolonging of the service life are also ensured.

Description

technical field [0001] The invention belongs to the technical field of water jet cutting and erosion pulse nozzles, and in particular relates to a pulse nozzle based on air resonance. Background technique [0002] High-pressure water jet technology is an emerging technology developed in modern times. It has the advantages of strong cutting ability and convenient operation in narrow spaces, and has been used more and more in various fields. As one of the branches, pulsed water jet has stronger cutting and erosion ability and higher erosion specific energy than continuous water jet, so it has broad application prospects. [0003] Scholars at home and abroad have done a lot of research to generate pulsed jets. For example, the patent document with the publication number CN1098337A discloses a high-efficiency energy-gathering oscillating pulse jet nozzle and its production method, and the patent document with the publication number CN102133562A discloses a multifunctional self-...

AI Technical Summary

Problems solved by technology

However, in order to produce the self-excited oscillation effect of the above-mentioned nozzle, the structure of the oscillation cavity inside the nozzle is relatively complicated, and the machining accuracy is difficult to guarantee, and because only relying on this structure and special boundary conditions to generate the oscillation pulse effect, its oscillation frequency is difficult to control

Of course, some scholars have studied the blocking pulse nozzle and the hammer pulse nozzle, but there are certain problems, and they cannot be popularized and applied on the basis of the existing processing technology.

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