Cutting head for receiving high pressure liquid jet
(57) Abstract:The invention relates to hydraulic machines, high pressure to obtain a high-pressure cutting supersonic liquid jets with a small angle expansion of their external borders in the open air space. In the cutting head for receiving high pressure liquid jet canal sealer is made variable cross-section. The length of the surface area of the Central channel of the seal, made from the nozzle in the form of a Laval nozzle, is much greater than the diameter of the inlet of the nozzle channel in its front section. The diameters of the inlet of the nozzle channel and the outlet channel of the seal in their end sections are equal, and the diameter of the outlet channel liner is not smaller than the diameter of the inlet section of the channel of the seal, the surface of which is made in the form of a Laval nozzle. In this two-stage cylindrical liner cutting head provided with a conical end, made at its smaller diameter and in contact with the input conical end of the deformable seal, and between the ends of the holder and the liner is installed shim and the insert with a smaller diameter is located in the holder, and Bo is t: when the fluid pressure at 250 MPa and the diameter of the outlet nozzle 100 ám cutting head provides the angle of the external borders of the jet in the free air space of not more than when the length of the cylindrical part of the flowing stream is not less than 0.5 mm 1 C. p. F.-ly, 1 Il. The invention relates to the field of machine tools, in particular to hydraulic machines, high pressure, and can be used, for example, when designing working heads gidroliznyh devices to obtain Morashtite thin cutting supersonic liquid jets.Known nozzle for receiving the fluid cutting jet (see and.with. N 1228915, publ. 07.05.86, bull. N 17, IPC6B 05 B 1/02) containing socket with a spherical end face and an axial channel of the fluid supply mounted on the nozzle holder, flush mounted in the holder liner with an outer conical surface and the outlet nozzle has a cylindrical shape with a conical inlet part, covering the liner sleeve adjacent its end to the spherical end fitting located with a clearance relative to the addressed end of the liner. The device has installed in the output side of the channel fitting swirler in the form of a conical tapering in the direction of the fluid spring, the smaller base of which is located outside of the channel fitting on the end of the liner. The internal diameter of the smaller base is set equal to the hole diameter of the cross section of the inlet part of the channel liner which is the impossibility of achieving sustainable jet at the nozzle exit of small diameter, forming a supersonic jet cutting fluids with enhanced properties (high specific pressure on the workpiece surface).Jet with improved cutting properties is a jet leaving the nozzle with a minimum angle of its exposure in free air space, and the parameters that affect the opening angle of the jet, multiple, and the main ones are the following: the level of initial turbulations flow of liquid supplied to the nozzle (the smaller, the better the stream output), geometry and workmanship of the Central channel of the nozzle (providing a minimum turbulization in the fluid flow), the level of the working fluid pressure depends on the flow rate of the jet (more or less than the speed of sound, that significantly affects the external geometry of the flowing stream).Today there is no consensus regarding the mechanisms of disintegration of jets of high and ultrahigh pressures, and there are no General mathematical relationships for determining the initial length of the cylindrical section of the jet, so in each case it is necessary to find it experimentally.In the known device to receive ustoichivee more than one millimeter) and subsonic speeds leakage of the fluid (so that is, for operating pressures of the fluid is less than 60 MPa), when the contribution of the quality (level of roughness) of the surface of the Central channel of the nozzle and its geometry in the inhibition of cross-border part of the flow (in cross section) and turbulization in comparison with the velocity fields of the main axial portion of the stream is not so significant. For supersonic jets of small diameter (35...100) μm forced swirling flow only resplit stream at the output due to inertial forces and, thereby, increase the opening angle of the jet in free air space, which, of course, will adversely affect its cutting properties. Known cutting head (and.with. N 597427, publ. 15.03.78, bull. N-10, MCP6B 05 B 1/02) for receiving high-pressure jet, containing situated in the body of the holder and installed sequentially and coaxially in contact with each other nozzle, a deformable seal and liner made them a Central channel, and the channel seal is made variable cross-section. In the canal sealer is a two-stage liner with the conical end of the ledge. Between the ends of the holder and the liner is installed shim. Insert a smaller diameter is located in the holder, and large - in the case the at the exit end of the liner and the surface of the Central channel deformable seal on the one hand, and between the end surface of the Central discharge opening of the deformable gasket and the inlet of the nozzle in its front section.The presence of these design flaws lead to significant turbulence in the flow of fluid supplied to the inlet of the nozzle, and, as a consequence, deterioration of the cutting properties of the emerging liquid jet (increase the angle of divergence of the jet in the free air space).The task of the invention is to improve the cutting properties of the jet by reducing the level of turbulence and cavitation in the flow cross section of the fluid supplied directly to the cross section of the inlet nozzle.Technical result achieved when using the present invention, is characterized by the following parameters cutting jet: when the value of the working fluid pressure at 250 MPa and the diameter of the outlet nozzle 100 μm, the angle of expansion of the external borders of the streams does not exceed six degrees when the length of the cylindrical part of the jet is not less than 0.5 mmThe above technical result is achieved by the fact that in the known device the cutting head for receiving vysokonaporny is aligned in contact with each other nozzle, a deformable seal and liner made them a Central channel, and the channel seal is made variable cross-section, according to the invention the diameters of the channels of the nozzle and seal in their contacting end sections are equal and much less than the channel length of the seal, the surface area with which the nozzle is made in the form of a Laval nozzle diameters flow areas of the channels of the liner and sealer in the area of their pair are equal and not less than the diameter of the inlet section of the channel seal is made in the form of a Laval nozzle.According to the invention the deformable seal cutting head made of metal.The execution of the diameter of the inlet channel of the nozzle and the outlet seal in their end sections are equal leads to such primary technical effect as an exception gradation at the junction of their assasino contacting ends and means and to the exclusion of further turbulence in the fluid flow at the entrance to the nozzle, which, in turn, reduces the angle of expansion of the external borders of the jets in free air space.The execution of the diameter of the outlet liner is not smaller than the diameter of the entrance open is to function effectively, as the imposition of sources of turbulence of fluid flow (tapered edge of the liner at the time of deformation of the seal may be formed from the material of the ring "influx") beyond smooth (in the mathematical sense) of the surface area of the Central channel of the seal, which, ultimately, reduces the angle of expansion of the external borders of the thin supersonic jet in free air space.Execution of the length of the surface area of the Central canal sealer (having the form of a Laval nozzle) from the nozzle of the cutting head is a lot bigger than the diameter of the inlet channel to the nozzle of the cutting head in its front section provides the primary technical effect, as the maximum possible laminarization fluid flow leaving the Central channel of the liner. Smooth the surface of the Central channel of the seal, made in the form of a Laval nozzle, plays the role of a damper fluid flow, while its length is selected calculation-experimental method depending on the nominal value of the diameter of the inlet nozzle and the working fluid pressure, which, ultimately, reduces the angle of expansion of the external borders of the thin St. the political sense) surface area of the Central channel of the seal is much greater than the diameter of the inlet of the nozzle channel in its front section provides such sverhsummarny technical effect, as an additional gradual reduction to the minimum design value pass hole of the Central channel of the gasket is deformed during application of the axial load to the liner in a moment of mutual nozzle seal, the deformable seal and liner during Assembly of the cutting head.The mentioned technical effect provides the final formation of the geometry of the Laval nozzle and the local increase in the rate of fluid flow, which leads to additional sverhsummarny the laminar < / span > flow of thin liquid stream over the cross-section of the Central channel of the seal with the smallest diameter.The invention is illustrated by a drawing, which shows a diagram of the cutting head for receiving high-pressure liquid jet, where:
1 - body;
2 - the holder;
3 - nozzle;
4 - deformable gasket;
5 - two-stage liner;
6 - an adjusting washer;
L is the length of the surface area of the Central channel of the seal, made in the form of a Laval nozzle.The cutting head contains located in the housing 1 holder 2, and installed sequentially and coaxially in contact with each other, the nozzle 3, for example, from Capparis 5, made them a Central channel, while the channel of the seal 4 is made variable cross-section.The length L of the surface area of the Central channel of the seal 4, made from the nozzle 3 in the form of a Laval nozzle, is much greater than the diameter of the inlet channel of the nozzle 3 in its end section (the larger the diameter of the inlet channel of the nozzle 3, the more the above-mentioned relation). The diameters of the inlet hole of the nozzle 3 and the outlet seal 4 in their end sections are equal, and the diameter of the outlet of the liner 5 is not smaller than the diameter of the inlet section of the Central channel of the seal 4, the surface of which is made in the form of a Laval nozzle. Two-stage cylindrical liner 5 of the cutting head provided with a conical end, made at its smaller diameter and in contact with the input conical end face of the seal 4, and the shim 6 installed between the ends of the holder 2 and the liner 5 and the liner 5 smaller diameter is located in the holder 2, and large - in the housing 1.The device operates as follows.When filing in the cutting head of the working fluid under pressure from the liner 5 by performing output is arnosti which is made in the form of a Laval nozzle, a jet of fluid regardless of the history of its formation additionally turbulizers, as a maximum, only the end section of the outlet of the liner 5 and the cross section of the inlet fluid flow in the channel of the seal, the surface of which is made in the form of a Laval nozzle. The possible appearance of influx metal seal 4 at the sharp edge of the tapered end of the liner 5 in the preliminary axial deformation of the seal 4 on the calculated value due to selection of the thickness of the shim 6 can cause further turbulence in the fluid flow.The length L of the Central channel of the seal 4, the value of which is much greater than the diameter of the inlet nozzle 3 in its front section, a flow of high-pressure fluid maximum calms down, that is laminaribioside to the highest possible status as due to optimally matched experimental values of size L, and, additionally, by increasing the flow rate of a fluid in a local narrowing of the Central canal sealer 4, finally took shape in the course of its axial deformation during Assembly of the cutting head. This, eventually, and provides the minimum angle of divergence of the jet are paid 3 and the outlet seal 4 in their end sections reduce to the lowest possible level the turbulization of the flow of liquid.The proposed device allows you to get the cutting supersonic jet of fluid with the angle of the disclosure in a free air space of not more than six degrees when the length of the cylindrical part of the flowing stream is not less than 0.5 mm when the fluid pressure at the inlet 250 MPa and the diameter of the outlet nozzle 100 microns.The invention can be effectively used in admixture in liquid diamond dust a certain fractional composition, for example, to separate the different gemstones with a nozzle diameter of the outlet (30. . . 60) microns (by minimizing the thickness of the cut provided by the reduced angles of divergence of the boundaries of the jet of fluid in a free air space). 1. Cutting head for receiving high-pressure liquid streams containing located in the holder case, and installed sequentially and coaxially in contact with each other nozzle, a deformable seal and liner made them a Central channel, and the channel seal is made variable cross-section, characterized in that the diameters of the channels of the nozzle and seal in their contacting end sections are equal and much less than the length of the canal sealer, castledyke and seal contact end sections are equal and not less than the diameter of the inlet section of the channel seal made in the form of a Laval nozzle.2. Cutting head for receiving high pressure liquid jet under item 1, wherein the deformable seal is made of metal.
FIELD: oil and gas industry.
SUBSTANCE: in end piece, flow conic slit-like channel of variable section is made screwed with rotation of longitudinal axis for angle 20-60°. Section at output is decreased in comparison to input in 1.5-3 times.
EFFECT: higher efficiency.
FIELD: sanitary equipment, particularly for domestic, medical and transport use.
SUBSTANCE: device includes lavatory pan with hinged seat, flushing tank, composite tube with operating handle to supply water from water source to pouring head, namely to shower head. Operating handle includes L-shaped connection pipe arranged in depression formed in seat and having short and long parts. L-shaped connection pipe rotates around long part axis during water pouring out process and may be longitudinally displaced. L-shaped connection pipe is freely arranged on lavatory pan and freely detached from it. Connection pipe is secured to pouring head. Short part of connection pipe is attached from below with water source by means of flexible hose. Short part axis is always parallel to pouring direction of pouring head. Operating handle includes two mutually perpendicular arms provided with seating areas for L-shaped connection pipe installation in different positions is socket of wall holder. Shower head made in accordance with the first embodiment comprises hollow body with outlet cavity, outlet net for water pouring and inlet L-shaped connection pipe. Connection pipe includes seating areas for shower head installation in wall holder socket formed in transition area between short and long parts of connection pipe. Shower head may perform mechanical rotation inside wall holder socket. Shower head made in accordance with the second embodiment comprises body with outlet cavity, outlet net for water pouring and handle. Arranged inside body are relief valve, shutoff member and operating lever connected to relief valve by the first lever arm and kinematically linked with control member of shower head handle by another, free, end. L-shaped connection pipe is used as shower head handle. Shower head handle has inner water hose. Connection pipe includes seating areas for shower head installation in wall holder socket formed in transition area between short and long parts of connection pipe. Shower head may perform mechanical rotation inside wall holder socket.
EFFECT: simplified structure, reduced number of supply pipeline branches, elimination of hinge and sealing connections usage, improved ability of device detachment.
3 cl, 6 dwg
FIELD: nozzles, particularly for cleaning reservoir bottom from residual viscous, high-viscous and hardening liquids and for removing deposits near connection pipes of fire-extinguishing systems adapted for extinguishing fire in reservoirs.
SUBSTANCE: device bottom is provided with radial eccentrically located distributors formed as plates having chamfers on the first plate sides. Plate length is less than device bottom radius. Plate height exceeds width of gap defined by device body and bottom.
EFFECT: increased efficiency along with maintaining design effective volume of the reservoir, reduced reservoir damage due to corrosive action.
FIELD: heat-and-power engineering, particularly for medium and deep water spraying in cooling towers, scrubbers, gas and steam condensing plants, gas-cleaning systems, for spraying high-viscous liquids or liquids with considerable content of impurities.
SUBSTANCE: nozzle comprises connection pipe and deflecting members formed so that cone angle of each next deflecting member is less than that of previous one. Nozzle has conical body. Deflecting members made as deflecting washers are arranged along vertical axis between at least two fixing posts. Deflecting washers have inner orifices decreasing in direction away from inlet connection pipe. Each deflecting washer is made as truncated cone. Outermost deflecting washer is of hemispheric shape and adapted for water spraying into area located under nozzle connected with pipeline by straight and adapter couplings. To increase hydraulic capacity and system flexibility cascade nozzles with lesser inlet connection pipe diameters are substituted for ones with greater diameters.
EFFECT: increased cooling efficiency, simplified structure, improved flexibility, minimizing of nozzle clogging.
FIELD: environmental protection.
SUBSTANCE: furnace comprises combustion chamber whose bottom section is provided with the igniter and branch pipe for supplying fuel, intermediate section is provided with the branch pipe for supplying waste, and top section is provided with the exhaust branch pipe connected with the duct for discharging flue gases. The casing is mounted around the chamber to define the air passage between the casing and outer side of the chamber. The passage is in communication with the bottom section of the combustion chamber and branch pipe for supplying fuel. The casing is provided with the air supply branch pipe. The branch pipe for supplying fuel receives at least one pair of vortex cyclonic chambers whose openings for air supply are made in opposite tangential directions.
EFFECT: enhanced environmental safety.
4 cl, 1 dwg
FIELD: irrigation equipment, in particular, fine-dispersion or drop sprinkling equipment used in mobile and stationary sprinkler units for producing of sprays with droplet sizes admissible for irrigation of wide range of farm crops.
SUBSTANCE: sprinkler unit has hollow cylindrical casing with partition wall, wherein guiding rod is rigidly fixed centrally of partition wall. Conical deflector with curved grooves is fixed on guiding rod for displacement along it. Location of conical deflector in predetermined position on guiding rod is provided by means of adjustment nut which may is fixed by lock nut. In order to form uniform liquid film around perimeter of conical deflector, grooves are provided in such a manner that they do not reach edge by distance equal to width of casing outlet opening ring, when conical deflector is lifted to maximal extent. Fluoroplastic layer is built in friction surface of conical deflector.
EFFECT: increased efficiency in producing of finely dispersed uniform spray, simplified construction and enhanced reliability in operation.
SUBSTANCE: invention relates to equipment for carrying out health-improving and curing hydrothermal treatment. Proposed contrast sprays set has sprays panel made of two non-communicating tubular systems consisting of collecting and operating pipes installed parallel to each other at preset angle to sides of sprays panel. Operating pipes are provided with great number of holes pointed to side of operating zone. Panel is installed on supports for reciprocating in plane of panel under action of drive.
EFFECT: provision of convenience in treatment of patient, and accurately checking of main parameters.
4 cl, 6 dwg
FIELD: spraying equipment, particularly hydrodynamics of delivery pipeline adapted to be used in different industries.
SUBSTANCE: device comprises pump, liquid vessel, barrel with control arm and flexible hoses. Barrel includes valve with grooves to provide working liquid jet bypass in reverse direction to pump inlet. Device also has means aimed at reduction of losses and minimization of force to be applied to valve control arm. More particularly, valve grooves are inclined at 60° angle one to another, device comprises collars for valve securing having outer and inner packing members with seats and providing free valve rotation about valve axis. The rotation is performed around pin with packing member. Pin diameter is considerably lesser than valve diameter.
EFFECT: simplified structure, improved performance and increased safety.
4 cl, 3 dwg
FIELD: liquid spraying equipment, particularly used in fire-fighting, sanitary and watering facilities, for liquid fuel combustion, etc.
SUBSTANCE: sprayer has body with channels for liquid jets forming and liquid supply nipple. The channels are directed so that axes thereof cross beyond channel outlets in sprayed liquid flow generation space. Minimal distance between crossing axes does not exceed hydraulic channel radius Rh value. Distance between outlet channel sections and sprayed liquid flow generation space defined by plane with minimal distance between crossing channel axes preferably does not exceed 80Rh. Sprayer body may be provided with chamber shaped as solid of revolution and installed beyond outlet channel sections. Axial channel may be formed in the sprayer body. Channels may have equal cross-sections. Sprayer in accordance with the second embodiment has one channel with cross-sectional area, which is not more than 2 times greater than that of another one.
EFFECT: increased uniformity of droplet intensity and dispersion over flow section, reduced energy consumption.
1 cl, 7 dwg
FIELD: spraying or atomizing.
SUBSTANCE: device comprises housing with the lid provided with even number of nozzles and disk deflector provided with odd number of ring recesses. Each ring recess has central corner that overlaps the outlet openings of adjacent nozzles.
EFFECT: improved design.
5 cl, 8 dwg