CN2494709Y - Jet atomization nozzle for multifunction supersonic flame plating - Google Patents

Abstract

The utility model relates to a jet atomization nozzle for multifunctional supersonic flame plating. The utility model is characterized in that the nozzle is divided into an oxygen inlet segment, an outstretched segment and a mixing chamber segment, the length value of the mixing chamber is similar to the diameter of the mixing chamber, and a coal oil inlet hole is arranged on the mixing chamber segment and presents an included angle with the mixing chamber. Compared with the prior art, the utility model has the advantages of simple structure, good atomizing quality, stable and sufficient combustion in spraying, no coking or backfire, and a certain protecting function on the shell of a combustion chamber. The utility model successfully solves the atomization problem of the multifunctional supersonic flame plating and can also be applied to other occasions of gas-liquid atomization.

Description

Multifunctional supersonic flame spraying jet atomization nozzle

The utility model belongs to the atomizing spraying technical field, relates to a kind of oxygen-kerosene HVAF spraynozzle.

In the prior art before the utility model, it is vaporific uniformly that two kinds of fluid media (medium)s atomizings of gas and liquid are mixed into distribution, the gas-liquid spraynozzle that forms combustion mixture has multiple, mainly contains five classes: direct current atomization type, centrifugal, coaxial-type, ultrasonic atomizatio formula, compound atomization type.Single flow spraynozzle atomizing effect is relatively poor, can not satisfy clean-burning requirement under multifunctional supersonic flame spraying low pressure reliable ignition and the spraying state.Centrifugal spraying nozzle atomizing effect is better, but structure is complicated, requires to have tangential hole (swirler) or minor air cell, and processing is difficulty, also is difficult for installing at the head of multifunctional supersonic flame gun.The coaxial-type spraynozzle is simple in structure, be easy to processing, but its atomizing angle is less, the continuous segment length of jet before atomizing mixes, and atomization quality is undesirable.The ultrasonic atomizatio nozzle need be installed supersonic generator, and is inapplicable in the limited spray gun of installation dimension and wiring.Compound spraynozzle structure is more complicated than eddy current type spraynozzle, though atomizing effect is good, is difficult to use in multifunctional supersonic flame spraying.In the existing gas-liquid spraynozzle,, in multifunctional supersonic flame spraying, can not directly use owing to be subjected to the restriction of atomization, structure, installation dimension etc.

Technology status and weak point at above-mentioned existing gas-liquid spraynozzle, the purpose of this utility model is: develop a kind of novel gas-liquid spraynozzle, claimed structure is simple, be easy to processing and installation, in gas pressure 0～16bar, fluid pressure 0～15bar scope, can both produce good atomizing effect.At the ignition phase of multifunctional supersonic flame spraying, guarantee spray gun reliable ignition in quite big parameter area.In the spraying stage, normally working effectively in assurance multifunctional supersonic flame spraying combustion chamber, guarantees burning fully, stability of flow, and do not produce rough burning, also the certain protection effect need be arranged to head of combustion chamber.

Now technical solution of the present utility model is described below:

According to the principle of jet atomization nozzle, the structural parameters of nozzle mainly contain: the oxygen intake diameter d ₁, kerosene inlet diameter d ₂, mixing chamber diameter D, mixing chamber length L, kerosene inlet angle a etc.They all have remarkable influence to the atomization of nozzle.Oxygen intake diameter and kerosene inlet diameter guarantee under certain pressure reduction, by the oxygen and the kerosene of corresponding discharge, and the oil gas mixing ratio when guaranteeing burning.Suitable kerosene inlet angle guarantees strong fragmentation between kerosene jet and oxygen jet, and suitable mixing chamber length and diameter guarantee that good atomizing mixes, and promote the stability of burning.The kerosene inlet diameter is determined by formula (1): $d_2=\sqrt{\frac{4{\stackrel{.}{m}}_2}{{\mathrm{\π\μ}}_2\sqrt{2{\mathrm{\ρ}}_2{\mathrm{\ΔP}}_2}}}---\left(1\right)$

Wherein,

, μ ₂, Δ P ₂, ρ ₂Be respectively flow, the discharge coefficient of kerosene inlet mouth, the kerosene inlet and the pressure reduction of combustion chamber and the density of kerosene of kerosene.

The oxygen intake diameter is determined by formula (2): $d_1=\sqrt{\frac{4{\stackrel{.}{m}}_1}{{\mathrm{\π\μ}}_1\sqrt{2\frac{k}{k-1}{P}_1{\mathrm{\ρ}}_1[{\left(\frac{P}{P_1}\right)}^{\frac{2}{k}}-{\left(\frac{P}{P_1}\right)}^{\frac{k+1}{k}}]}}}---\left(2\right)$

Wherein, , μ ₁, P ₁, P, ρ ₁, κ is respectively the flow of oxygen, the discharge coefficient of oxygen intake mouth, the pressure of oxygen intake, the pressure of combustion chamber, the density at oxygen intake place and the specific heat ratio of oxygen.

According to above-mentioned principle, the utility model calculates and repetition test through theoretical, the optimum structure and the structural parameters of nozzle have been drawn, it is characterized in that: nozzle is divided into three sections, oxygen intake section, expansion segment, mixing chamber region, kerosene spray orifice are opened on mixing chamber region and with mixing chamber and are 35 °～45 ° angles; The oxygen intake diameter is 3～6mm; The kerosene inlet diameter is 0.3～0.6mm; The diameter that the length of mixing chamber is got mixing chamber is 6～10mm.Oxygen enters mixing chamber from the top of nozzle, and kerosene enters mixing chamber from two of the nozzle side (or a plurality of, decide on flow) spray orifices by certain angle, atomizing is mixed into combustion mixture in mixing chamber, from the spout ejection, enter the combustion chamber then, participate in combustion process.

Now that description of drawings is as follows:

Fig. 1: the utility model structural representation

Fig. 2: the utility model most preferred embodiment assembling schematic diagram

As shown in Figure 2, (1) is oxygen nozzle, and (2) are the kerosene mouth, and (4) are burning chamber shell, and (3), (5) are sealing gasket, and (6) are O-ring seals.Oxygen enters interior mixing chamber by oxygen nozzle, kerosene is entered the liquid collecting cavity of oxygen nozzle lower end earlier by the inclined hole on the burning chamber shell by the kerosene mouth, enter interior mixing chamber by two place's inclined holes on the oxygen nozzle then, oxygen and kerosene atomize mix to form behind the combustion mixture in mixing chamber and spray into the combustion chamber from the spout of nozzle and burn.

The utility model is compared with prior art, and is simple in structure, is easy to processing and installation; Atomization quality Good, in quite wide parameter area, can both produce good atomizing effect, can fully satisfy multi-functional The needs of HVAF igniting and spraying, igniting is reliable, flameholding, abundant during spraying, Noncoking, not tempering, and burning chamber shell had certain protective effect, combustion chamber in the use procedure Housing is not ablated. The utility model has successfully solved the atomizing of multifunctional supersonic flame spraying, Also can be applicable to the occasion of other gas-liquid atomizing, such as burning, pharmacy, dusty material manufacturing etc., will Produce good economic benefit and social benefit.

Claims (2)

1, a kind of multifunctional supersonic flame spraying jet atomization nozzle is characterized in that: nozzle is divided into three sections, oxygen intake section, expansion segment, mixing chamber region; The diameter that the length of mixing chamber is got mixing chamber is 6～10mm; The kerosene ingate is opened on mixing chamber region and with mixing chamber and is 35 °～45 ° angles;

The kerosene inlet diameter is determined by following formula: $d_2=\sqrt{\frac{4{\stackrel{.}{m}}_2}{\mathrm{\π}{\mathrm{\μ}}_2\sqrt{2{\mathrm{\ρ}}_2{\mathrm{\ΔP}}_2}}}$ Wherein, , μ ₂, Δ P ₂, ρ ₂Be respectively flow, the discharge coefficient of kerosene inlet mouth, the kerosene inlet and the pressure reduction of combustion chamber and the density of kerosene of kerosene;

The oxygen intake diameter is determined by following formula: $d_1=\sqrt{\frac{4{\stackrel{.}{m}}_1}{{\mathrm{\π\μ}}_1\sqrt{2\frac{k}{k-1}{P}_1{\mathrm{\ρ}}_1[{\left(\frac{P}{P_1}\right)}^{\frac{2}{k}}-{\left(\frac{P}{P_1}\right)}^{\frac{k+1}{k}}]}}}$

Wherein, , μ ₁, P ₁, P, ρ ₁, κ is respectively the flow of oxygen, the discharge coefficient of oxygen intake mouth, the pressure of oxygen intake, the pressure of combustion chamber, the density at oxygen intake place and the specific heat ratio of oxygen.

2, multifunctional supersonic flame spraying according to claim 1 jet atomization nozzle is characterized in that: oxygen intake diameter optimum value is 3～6mm; Kerosene inlet diameter optimum value is 0.3～0.6mm.

Images