RU2345280C1 - Acoustic nozzle - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention is related to facilities for spraying of liquids, solutions. Acoustic nozzle comprises body with acoustic generator installed inside in the form of nozzle and resonator, tube for supply of air and liquid. Body is arranged in the form of cylinder with bottom, body is provided with cylindrical cavity for supply of liquid via tube arranged in cover, in upper part of which fastening element is provided that fixes upper part of gas-jet transmitter rod in nozzle provided in cover, and upper part of rod is hingedly fixed to lower part of transmitter in cover by means of at least one fixing disk arranged in the form of at least three elastic lobes that interact with internal surface of cover tapered surface, and slot channel for liquid supply is arranged between opening in body bottom and external surface of nozzle cover, and annular channel for supply of spraying agent is arranged between internal surface of tapered opening and external surface of rod lower part. Ratio of transmitter height h₁ to distance h between upper base of tapered surface and lower end surface of nozzle lies within optimal range of values: h₁/h=1÷3; ratio of internal diameter d₁ of transmitter cavity to diameter d₂ of its external cylindrical surface lies in optimal range of values: d₁/d₂=0.7÷0.9; ratio of external diameter d₁ of transmitter cavity to diameter d of its rod lies in optimal range of values: d₁/d=1÷3; ratio of internal diameter d₁ of transmitter cavity to cavity height h₁ lies in optimal range of values: d₁/h₁=1÷1.5.

EFFECT: higher efficiency of spraying.

2 cl, 1 dwg

Description

The invention relates to means for spraying liquids, solutions and can be used in engine building, chemical, food and light industries.

The closest technical solution to the claimed object is an acoustic atomizer-nozzle for AS USSR No. 306270, F02C 7/24, 06/11/1971, comprising a housing with an acoustic oscillator located inside the nozzle and resonator, made in the form of concentric annular slots located in a plane perpendicular to the axis of the housing, a ring with a conical surface connected to the housing and a sprayer, which serves to form a liquid film that blocks the exit from the generator, and is fixed in the housing by means of a hollow rod with a screw swirl at the end, and a shoulder for placing an annular platform onto which the liquid flows bone from a nebulizer (prototype).

A disadvantage of the known acoustic nozzle is that it does not provide a high degree of atomization.

The technical result is an increase in spraying efficiency.

This is achieved by the fact that the acoustic nozzle contains a housing with an acoustic oscillator located inside the nozzle and resonator, a tube for supplying air and liquid. According to the invention, the housing is made in the form of a cup with a bottom, a cylindrical cavity is made in the housing for supplying fluid through a tube located in the lid, in the upper part of which there is a fastening element fixing the upper part of the rod of the rod gas-jet emitter in the nozzle made in the lid, and the upper part the rod is pivotally connected to the lower part of the emitter in the cover by means of at least one fixing disk, made in the form of at least three elastic petals interacting with the inside renney surface of the conical hole cover, and between the opening in the bottom of the housing and the outer surface of the cover is configured slotted nozzle channel through which fluid flows, and between the inner surface of the conical hole and the outer surface of the lower part of the rod has an annular channel on which the spattering agent does.

The drawing shows a General view of an acoustic nozzle for spraying liquids.

The acoustic nozzle comprises a housing 5 made in the form of a cup with a bottom, in which a cylindrical cavity 1 is provided for supplying liquid through a tube 16 located in the cover 6. In the housing 5 of the nozzle, a cylindrical groove 8 is provided, in which an elastic sealing element 9 is located, with the cover 6 and the housing 5 are connected by screws 7. In the upper part of the lid 6 there is a fastener 10 fixing the upper part of the rod 12 of the rod gas-jet emitter 4 (resonator) Hartmann in the nozzle 18. Through the slotted channel 11, the spraying agent p steps to the nozzle 18. Between the opening in the bottom of the housing 5 and the outer surface 18 of the nozzle cover 6 is slotted bore 2, through which fluid flows. An annular channel 3 is made between the inner surface of the conical hole 17 and the outer surface of the lower part of the rod 13, through which a spraying agent, for example, air, enters.

The upper part of the rod 12 is pivotally connected to the lower part of the rod 13, which is fixed relative to the conical hole 17, made in the cover 6, by means of at least one locking disk 14, made in the form of at least three elastic petals 15, interacting with the inner surface tapered hole cover 6.

For optimal operation of the nozzle, the following ratios of its parameters must be observed:

- the ratio of the height h _{1 of the} emitter 4 to the distance h between the upper base of the conical surface 19 and the lower end surface of the nozzle 18 lies in the optimal range of values of h ₁ / h = 1 ÷ 3;

- the ratio of the inner diameter d _{1 of the} cavity 20 of the emitter 4 to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values of d ₁ / d ₂ = 0.7 ÷ 0.9;

- the ratio of the inner diameter d _{1 of the} cavity 20 of the emitter 4 to the diameter d of its rod lies in the optimal range of values d ₁ / d = 1 ÷ 3;

- the ratio of the inner diameter d _{1 of the} cavity 20 of the emitter 4 to the height h _{1 of the} cavity 20 lies in the optimal range of values d ₁ / h ₁ = 1 ÷ 1,5.

The acoustic nozzle operates as follows.

Liquid under pressure is supplied to a cylindrical cavity 1 located outside the emitter 4, from where it flows through the slotted channel 2 in the form of a film, which is exposed to fluctuations in velocity and pressure generated by pulsating shock waves that occur near the annular channel 3 due to the supersonic jet flowing onto the resonator 4. As a result, the film is crushed into small droplets, which together with the air stream form a torch of atomized liquid.

Claims (2)

1. The acoustic nozzle contains a housing with an acoustic oscillator located inside the nozzle and resonator, a tube for supplying air and liquid, characterized in that the housing is made in the form of a cup with a bottom, a cylindrical cavity for supplying fluid through the tube located in a lid, in the upper part of which there is a fastening element fixing the upper part of the rod of the rod gas-jet emitter in the nozzle made in the lid, and the upper part of the rod is pivotally connected to the lower part a radiator in the lid by means of at least one fixing disk made in the form of at least three elastic petals interacting with the inner surface of the conical opening of the lid, and a slot channel is made between the opening in the bottom of the housing and the outer surface of the lid nozzle, through which liquid enters, and between the inner surface of the conical hole and the outer surface of the lower part of the rod there is an annular channel through which the spraying agent enters. 2. The acoustic nozzle according to claim 1, characterized in that the ratio of the height h _{1 of the} emitter to the distance h between the upper base of the conical surface and the lower end surface of the nozzle lies in the optimal range of values of h ₁ / h = 1 ÷ 3; the ratio of the inner diameter d _{1 of} the emitter cavity to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values of d ₁ / d ₂ = 0.7 ÷ 0.9; the ratio of the inner diameter d _{1 of} the emitter cavity to the diameter d of its rod lies in the optimal range of values d ₁ / d = 1 ÷ 3; the ratio of the inner diameter d _{1 of} the emitter cavity to the height h _{1 of the} cavity lies in the optimal range of values: d ₁ / h ₁ = 1 ÷ 1,5.