RU2636522C1 - Method and device for producing fine aerosols with prevention of atomizer clogging - Google Patents

Abstract

FIELD: technological processes.SUBSTANCE: method involves feeding fluid to a rotating calibrated hole through a filter mounted after the stuffing box. The device for the preparation of fine aerosols with the prevention of atomizers clogging contains a filter that cleans the fluid, fed from it through random sores, a stuffing box connecting the fixed part of the device with its rotating part containing the rotator. The device also comprises a collet connecting the rotator to the fluid feeding channel and a nozzle with calibrated hole at its end located at a distance from the axis of rotation and forming a jet that breaks into droplets. Filter is made of chemically resistant mesh with cell sizes less than the calibrated hole and positioned at an acute angle to the axis of rotating channel just before the collet, to seal the mesh, which is mounted in an oblique section of the tube. Slope of the tube cut relative to the rotation axis provides an increase in filter area without changing the channel diameter. The need to clean the filter is detected as a result of reduction in flow rate of fluid arising from the commensurability of filter uncoloured part with the area of the calibrated hole, and the cleaning of filter is ensured through the outlet by feeding return flow of fluid, purified from microparticles.EFFECT: increasing the working life.2 cl, 1 dwg

Description

The invention relates to the field of inkjet technology for producing monodisperse flows of droplets, can be used in various sectors of the national economy for coating by the jet-centrifugal method.

Known generator of monodisperse drops [1], made in the form of two capillary tubes communicated with the reservoir. The output ends of the tubes are spaced and facing each other. The generator is also equipped with an elastic membrane mounted above the surface of the liquid in the tank, connected to a source of mechanical vibrations. To increase the generation efficiency due to the initial velocity drops being communicated, the output ends of the capillary tubes are cut symmetrically with respect to the central axis of symmetry of the reservoir. The source of mechanical vibrations through the elastic membrane creates a periodically changing pressure on the surface of the dispersible liquid in the tank, which leads to periodic fusion and separation of the menisci formed at the outlet ends of the tubes.

The disadvantage of [1] is the possibility of clogging of the holes of the capillary tubes.

A device for spraying liquid, a centrifugal nozzle [2], containing a vertically mounted chamber with a tangential inlet and a nozzle hole, is placed in the chamber along the axis with the formation of the upper and lower parts of the turbine with blades and an axial hole, a cover, breaker elements, blades.

The disadvantage of [2] is the complexity of the design and the inability to obtain monodisperse aerosols.

The closest to the essence of the claimed invention, the prototype is a method of producing a stream of droplets [3], which involves the use of a device containing a filter that purifies the liquid supplied through it from random sorin, an oil seal connecting the stationary part of the device with its rotating part containing a rotator, collets, connecting the rotator to the fluid supply channel and the nozzle with a calibrated hole made at its end located at a distance from the axis of rotation and forming a jet that breaks up into droplets .

The disadvantage of the prototype [3] is the contamination of a calibrated hole with a diameter of less than 100 microns, wear products of the stuffing box.

The aim of this invention is to eliminate the clogging of a calibrated hole with a diameter of less than 100 microns, wear products of the seal.

To achieve this goal in a known method of producing a stream of droplets, involving the use of a device containing a filter that purifies the liquid supplied through it from random sorin, an oil seal connecting the stationary part of the device with its rotating part containing a rotator, a collet connecting the rotator to the liquid supply channel and a pipe with a calibrated hole made at its end, located at a distance from the axis of rotation and forming a jet that breaks up into droplets. The filter is made of a chemical-resistant mesh in the form of an ellipse with mesh sizes less than the size of the calibrated hole, located at an acute angle to the axis of the rotating channel directly in front of the collet to ensure sealing of the mesh mounted in an oblique section of the tube. The slope of the cut of the tube relative to the axis of rotation provides an increase in the filter area without changing the diameter of the channel, significantly increasing its working life until the need to clean the filter is revealed, which is revealed as a result of a decrease in the liquid flow rate that arises when the non-clogged part of the filter is comparable with the area of the calibrated hole, and filter cleaning is provided through the outlet by supplying a reverse flow of liquid purified from microparticles.

To explain this device in FIG. its schematic section is given, where 1 is an oil seal, 2 is a tube, 3 is a filter, 4 is a rotator, 5 is a collet, 6 is a channel, 7 is a pipe, 8 is a calibrated hole.

The claimed invention is implemented in the following way. As shown in Fig., The tube 2 is cut at an acute angle in the area corresponding to the area of the rotator 4. Then, the surface of the cut is tinned, followed by mounting a filter on it and sealing the cut by soldering.

The device operates as follows. The fluid is supplied to the gland 1, falling into the rotating tube 2, in an oblique section of which a mesh filter 3 of a chemically resistant mesh with mesh sizes less than the size of the calibrated hole is placed. The rotator 4 provides the necessary flow rate of fluid into the pipe 7 and the movement of the calibrated hole 8 in accordance with the required dispersion of the sprayed liquid and the path of the aerosol.

As a result of the use of this invention, the clogging of the calibrated hole is eliminated when its diameter is less than 100 microns, wear products of the gland.

The examples of application of the present invention show its usefulness for obtaining a monodisperse stream of submillimeter drops.

The present invention satisfies the criteria of novelty, since when determining the level of technology, no means have been found that have characteristics that are identical (that is, matching the functions performed by them and the form in which these signs are performed) to all the signs listed in the claims, including the purpose of the application.

The present invention has an inventive step, because it has not been identified technical solutions having features that match the distinguishing features of this invention, and not known the influence of distinctive features on the specified technical result.

The claimed technical solution can be implemented in the field of obtaining products from rapidly polymerizing liquids and in the spectral analysis of various solutions.

USED SOURCES

1. Harutyunyan S.O. The generator of monodispersed drops // A.S. No. 1388105. Application: 4099482, 05/11/1986. Published: 04/15/1988. Bull. Number 14.

2. Childless IV, Mikhailenko GG, Sherstobitov VV Centrifugal nozzle // A.S. No. 889122. Application: 2896522, 03.20.1980. Published: December 15, 1981. Bull. No. 46.

3. Karikh F.G., Karikh A.F. A method of obtaining a stream of drops. // Patent of Russia No. 1834714. Application: 4888996, 12/10/1990. Published: 08/15/1993. Bull. No. 30.

Claims (2)

1. A method of obtaining fine aerosols to prevent clogging of nozzles, comprising supplying fluid to a rotating calibrated hole, characterized in that in order to eliminate clogging of the calibrated hole when its diameter is less than 100 μm, the wear of the stuffing box provides fluid supply to the calibrated hole through a filter mounted after the stuffing box . 2. A device for producing fine aerosols to prevent nozzle clogging, including a filter that cleans the liquid supplied from it from random sorin, an oil seal connecting the stationary part of the device with its rotating part, containing a rotator, a collet connecting the rotator to the liquid supply channel, and a pipe with a at its end, a calibrated hole located at a distance from the axis of rotation and forming a jet decaying into droplets, characterized in that the filter is made of a chemically resistant mesh with The cells of the cells are smaller than the size of the calibrated hole and placed at an acute angle to the axis of the rotating channel directly in front of the collet to ensure sealing of the mesh mounted in an oblique section of the tube, which ensures an increase in the filter area without changing the diameter of the channel, thereby increasing its working life, while the need to clean the filter it is detected as a result of a decrease in fluid flow that occurs when the non-clogged part of the filter is commensurate with the area of the calibrated hole, and cleaning tra provided through the outlet reverse feed fluid stream, cleaned of the microparticles.

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