Section of radiator for cooling system of internal combustion engine
FIELD: engine engineering.
SUBSTANCE: radiator section comprises bank of flat-oval tubes that are set and soldered into the openings of the top and bottom tube boxes, finned plates, and collectors. The ends of the flat-oval tubes diverge outward. The tube boxes are provided with openings with flanges mating to the outwardly diverging ends of the flat-oval tubes. The tubes are soldered to the tube boxes. According to the other version, the tube boxes are sectional and made of main tube boxes with the openings and hollows arranged over periphery or along the boxes and spacing shaped bushings. The ends of the tubes are soldered to the spacing shaped bushings with a zinc solder.
EFFECT: enhanced reliability and efficiency.
2 cl, 5 dwg
The invention relates to the field of heat exchangers, in particular for radiator cooling systems of internal combustion engine (ice) locomotives and other vehicles.
Well-known section of the radiator of the cooling system of internal combustion engines, containing the beam plancoulaine tubes arranged in a checkerboard pattern, is inserted and soldered refractory copper-phosphorous brazing alloy into the copper pipe box with raised towards collectors outer edges of the cross-sectional shape of the section, finned shared plates soldered to the cooling tubes of tin-lead solder, cast steel manifolds welded brass tubular housings, and side panels (Collection of Transportation engineering 11-66-1, NIIINFORMTYAZHMASH, Moscow, 1966, p.10, 11).
The disadvantages of the known radiator sections are:
- small internal section plancoulaine tubes (the transverse size of only 1.1 mm), leading to intense their clogging (especially the input and output sections) and a significant increase in hydraulic resistance, resulting in reduced water flow through the system; in winter operation due to clogging of pipes or poor circulation of water on them, there is a danger of its freezing; in addition, because of the small bore tubing is difficult to drain water from sections of the radiator;
Well-known section of the radiator of the cooling system of the internal combustion engine adopted for the prototype, containing the beam corridor is located plancoulaine tubes that are inserted into and soldered tin-lead solder in the holes of the flat top and bottom tube boxes, plate fins soldered to PlasmaWall tubes also tin-lead solder, composite reservoir temperature deformation compensators in the form of a bellows (Transportation engineering, 5-67-7, NIIINFORMTYAZHMASH, Moscow, 1967, p.17-21).
Well-known section is characterized by a relatively low thermal efficiency, high hydraulic resistance, and limited durability and service life due to its use for the connection of tubes and tube boxes tin-lead solder.
The technical result of the invention is to increase the strength of the connection plancoulaine pipe the pipe boxes, the decrease in these tubes, hydraulic losses and improve thermal efficiency and reliability of the radiator sections.
This technical result is achieved by the fact that in the section of the radiator of the cooling system of the internal combustion engine, containing the beam corridor is located plancoulaine tubes that are inserted into and soldered in the holes of the upper and lower pipe boxes, plates, fins, headers, plancoulaine tube made from expanding outward ends of the oval, tubular cartons are made with holes flanged shape expanding outward ends plancoulaine tube edges with grooves around the perimeter or along the flanged edges of the holes of tube boxes; connection extending out of the ends of the oval plancoulaine tubes and tube boxes made by soldering zinc solder; section of a heat sink according to another variant unlike the above options only change the pipe boxes, which are made of a compound - of the main pipe boxes with holes and recesses around their perimeter or along them and the spacer profile sleeve corresponding to the expanding outward ends of the oval plancoulaine tubes and installed in the holes of the upper and lower main pipe boxes welded to them copper. Connection extends the I out of the ends of the oval plancoulaine tube with spacer profile bushings made by soldering zinc solder.
Figure 1 shows a section of a radiator in the section, General view; figure 2 - element 1 And the connection tubes of the upper tube box; figure 3 - element B figure 1 - connection tubes from the bottom of the pipe box. Figure 4 - option element 1 And the connection tubes of the upper tube box in the last integral with the spacer profile bushings, figure 5 - B figure 1 - connection tubes of the lower tube box in the last integral with the spacer profile of the sleeves.
The section of the radiator of the cooling system of the internal combustion engine (Fig.1-3) contains the beam corridor is located plancoulaine tube 1 inserted and soldered into the holes 2 of the upper pipe 3 boxes and into the holes of the bottom tube 4 box 5, plate fins 6, the reservoir 7; plancoulaine tube 1 is made with extending outward ends 8 oval-shaped; tube boxes 3 and 5 are made with beaded shape expanding outward ends 8 plancoulaine tubes 1 edges 9 of the holes 2 in the upper tube box 3 and the edges 10 of the 4 holes in the lower tube box 5, with grooves 11 around the perimeter or along the flanged edges of the holes 2 in the upper tube box 3 and the recesses 12 on the perimeter or along the flanged edges of the openings 4 in the bottom of the pipe box 5; connections extending outside ancov 8 oval plancoulaine tubes 1 tube boxes 3 and 5 are made by soldering zinc solder.
The section of the radiator can be made according to other variant (figure 4 and 5) - with integral tube boxes, consisting of the main pipe boxes, respectively, the top 13 and bottom 14 with holes in them, respectively 15 and 16, the recesses respectively 17 and 18 around the perimeter of their holes 15 and 16, or along them and of the spacer profile sleeve 19 in the upper pipe box 13 and 20 in the lower tubular carton 14, the respective expanding outward ends 8 oval plancoulaine tubes 1 and installed in the holes 15 and 16 of the upper and lower main pipe boxes 13 and 14 and welded thereto copper. Connection extending out of the ends of the oval plancoulaine tube with spacer profile bushings made by soldering zinc solder.
Section radiator works as follows.
Hot water cooling system of the internal combustion engine enters the section of the radiator through the holes of the collector 7, passes through the inlet extending out of the ends 8 oval plancoulaine tubes 1, the channels of the tubes 1, the output of expanding outside their ends 8, is cooled by passing heat through the tube walls 1 and plate fins 6 air flow circulating between the plates of the fins 6, and then enters another collector 7, a through hole which extends from the partition.
Thanks the issue is the implementation plancoulaine tubes 1 with expanding outward ends 8 will be substantially reduced hydraulic losses during the flow of water through them and reduced their blocking, increased thermal efficiency of the radiator sections are provided free emptying of the section, as the minimum internal cross-section size of the ends 8 oval plancoulaine tubes 1 significantly more water droplets, increased contact surface extending ends 8 plancoulaine tubes 1 with beaded edges 9 of the holes 2 and the edges 10 holes 4 pipe boxes 3 and 5, and thereby improves the durability of the soldered connections, even when using less durable than high-temperature copper-phosphorous, mainly used in diesel radiator sections, zinc-temperature solder.
When running pipe boxes compound (different version) - from the main pipe boxes 13 and 14 and the spacer profile of the sleeves 19 and 20 of the above-noted positive features of the invention will be fully retained, but will be simplified and cheapened their production.
Use for soldering plancoulaine tubes 1 tube boxes 3 and 5 zinc solder instead of the high-temperature copper-phosphorous will completely eliminate the risk of burnout and the burning of the ends of the tubes 1, which will allow the use of a tube with a reduced wall thickness, in addition, will not be broken contact plate fins 6 of the tube 1 near the tube boxes 3 and 5 due to melting albanovizotto solder. The use of medium temperature zinc solder in combination with tin-lead, used for soldering pipes with fins fins will allow soldering of the package (the tube bundle and tube boxes and plates beading) section in special furnaces, completely eliminating time-consuming and difficult controlled manual soldering of high-temperature copper-phosphorous brazing using gas burners.
1. The section of the radiator of the cooling system of the internal combustion engine, containing the beam corridor is located plancoulaine tubes that are inserted into and soldered in the holes of the upper and lower pipe boxes, plates, fins, headers, characterized in that plancoulaine tube made from expanding outward ends of the oval, tubular cartons are made with holes flanged shape expanding outward ends plancoulaine tube edges with grooves around the perimeter or along the flanged edges of the holes pipe boxes, connections extending out of the ends of the oval plancoulaine tubes and tube boxes made by soldering zinc solder.
2. The section of the radiator of the cooling system of the internal combustion engine, containing the beam corridor is located plancoulaine tubes that are inserted into and soldered in holes in the rhna and lower pipe boxes, plate fins, headers, characterized in that plancoulaine tube made from expanding outward ends of the oval, tubular carton is made of a composite of the main pipe boxes with holes in them and recesses around their perimeter or along them and the spacer profile sleeve corresponding to the expanding outward ends of the oval plancoulaine tubes and installed in the holes of the upper and lower main pipe boxes and welded thereto copper connections extending out of the ends of the oval plancoulaine tube with spacer profile bushings made by soldering zinc solder.
FIELD: heat engineering, particularly air inlet and outlet headers for exhaust gas heat recovery devices, particularly for devices to heat air with exhaust combustion products from compressor of gas-turbine plant used in gas-transfer devices for compressor stations of gas main pipelines.
SUBSTANCE: method involves cutting metal sheets into case blanks; folding and welding the blanks to create header body preferably having cylindrical shape; cutting orifice for tube plate installation into the case, wherein orifice edges define contour of cylindrical rectangle having height of 0.72-0.95 of header height in heat-exchanging unit and with angular width equal to 0.07-0.25 of header case cross-sectional perimeter; cutting out tube plate; beveling thereof and forming orifices in the tube plate, wherein summary orifice area is equal to 0.52-0.81 of total tube plate area; welding tube plate to above header case orifice edges so that orifice edges are arranged within the bounds of tube plate contacting the edges.
EFFECT: increased manufacturability, reduced metal consumption along with improved structural rigidity thereof, simplified production and decreased labor inputs.
13 cl, 5 dwg
FIELD: power engineering, particularly gas cooling equipment.
SUBSTANCE: method involves producing least two intermediate header body sections provided with orifices adapted to receive connection pipes having flanges to connect thereof with gas inlet or outlet chambers of heat-exchanging section of the gas air-cooling plant; manufacturing end body members shaped as doubly curved bottoms; producing flanges with connection pipes; assembling and welding header body and welding bottoms to intermediate sections of header body. Header body is created by joining intermediate sections to central cylindrical one to form T-member having two coaxial cylindrical parts adjoining intermediate sections and having diameters of not less than intermediate section diameters. Adjoined to above cylindrical parts is the third cylindrical part adapted to be connected to gas pipeline. The third cylindrical part is inclined substantially at 90° to above cylindrical parts and extends substantially at 90° to plane passing through vertical axes of the connection pipes of intermediate sections. Diameter of the third cylindrical part is equal to 0.81-1.10 diameters of cylindrical body part. Technological support to facilitate manufacture of gas inlet and outlet header body or header body sections has frame with at least two support members, namely with support plates arranged from both sides from medium vertical plane of housing body to be produced and spaced apart from longitudinal axis thereof to support contact points in lower body half for radial distance corresponding to outer body radius. Each support member comprises not less than one flat part tangential to corresponding radius and arranged to be supported along cylindrical body section generator or cylindrical body part generator so that above radius is spaced an angular distance equal to 15-75° from vertical line in plane transversal to the generator in both opposite directions beginning from lower point of cross-section of the body or body section preferably shaped as solids of revolution.
EFFECT: increased manufacturability, reduced labor inputs and material consumption for header components assemblage, increased quality, reliability and service life of header characterized with elevated internal pressure due to optimized parameters of header body sections and technological supports, increased assemblage accuracy and improved header body stability during boring operations performing.
18 cl, 5 dwg
FIELD: heat and power engineering, namely tube walls of inlet or outlet chambers of apparatus for air cooling of gas or section of such apparatus.
SUBSTANCE: tube plate of chamber of gas inlet or gas outlet of heat exchange section of apparatus for air cooling of gas includes plate in the form of parallelepiped, mainly right-angled one. Said plate includes system of through openings for ends of heat exchange tubes of tube bundle. Said openings are arranged by rows along height of wall at pitch of their axes in row being in range (1.7 - 3.4) d; at pitch of rows along height of wall being in range (1.6 - 3.4)d where d - diameter of openings. Said openings are shifted in adjacent rows by value 0.35 -0.65 of pitch in row. Projection of surface area of wall carcass onto mean plane of tube wall exceeds by 4 - 12.5 times projection of total surface area of voids of wall on the same plane. Portion of continuous cross section is arranged along perimeter of tube wall for forming rigidity band of tube wall. Surface area of rigidity band consists 16.0 - 45.0% of tube wall surface area.
EFFECT: enhanced strength, lowered metal consumption of construction due to optimal parameters of tube wall.
10 cl, 3 dwg
FIELD: engineering of collectors for injection or drainage of gas for apparatuses for air-based gas cooling.
SUBSTANCE: device has bearing frame, on which not less than three cradle supports are mounted for supporting body of collector for injection or drainage of gas and for abutment of branch pipe connected thereto for connection to gas main, and no less than four portal supports for temporary technological holding by plane, rotation angle and position along collector for injection or drainage of gas of branch pipes with flanges for connection to chambers for inlet or outlet of gas of heat-exchange sections of air-based gas cooling apparatus adequately to position of contact surfaces of response flanges and mounting apertures in them in chamber for inlet or outlet of gas. At least two cradle supports are positioned with possible abutment of body of collector for injection or drainage of gas against them in accordance to suspension scheme, each one primarily between additional pair of portal supports, mounted below outmost and adjacent flanges of branch pipes for connection to chambers for inlet or outlet of gas. Each portal support is made with detachable beam, which is provided with device for temporary holding by plane and rotation angle of flange of appropriate branch pipe and for connection of it to body of collector for injection or drainage of gas in planned position.
EFFECT: simplified construction of building berth while providing for high precision of manufacturing of collector for drainage or injection of gas.
4 cl, 4 dwg
FIELD: power engineering, particularly gas cooling plant components.
SUBSTANCE: gas inlet or outlet chamber is made as a high-pressure tank and comprises side, upper, lower and end walls. Gas inlet or outlet chamber also comprises not less than two load-bearing partitions arranged between side walls and provided with through orifices. One chamber wall is made as tube plate with orifices defining grid structure and adapted to receive heat-exchanging tube ends. One chamber wall has orifices to receive pies to connect thereof with gas inlet or outlet manifold, which supplies gas to or discharges gas from the chamber. Orifices for connection pipe receiving, load-bearing partition orifices and tube plate orifices define communication system to connect gas air cooling plant with gas pipeline. The communication system has several stages with orifices formed so that orifice number at each stage successively changes in gas flow direction. For gas inlet chamber above number increases, for gas outlet chamber the number decreases.
EFFECT: possibility to equalize velocity field, reduced hydraulic hammer, which results in reduced power losses in pipeline conveying gas to be cooled and in increased thermal performance of air cooling plant as a whole or air cooling plant section, increased economy of plant production and operation.
3 dwg, 13 cl
FIELD: power engineering, in particular, heat exchange devices, primarily, air-based gas cooling apparatuses.
SUBSTANCE: device is made in form of reservoir working under pressure, including cylindrical body with end portions of two-side curvature, central branch pipe for connection to gas main and branch pipes for connecting to chambers for inlet or outlet of gas of heat-exchange sections of air gas cooling apparatus, while cylindrical body is made of technological sections, central one of which is made primarily in form of unified technological element with central branch pipe, and branch pipes for connection to chambers for inlet and outlet of gas of heat exchange sections of air gas cooling apparatus are mainly symmetrically positioned on both sides from central technological section and number of these branch pipes on each side ranges from 2 to 8, while the area of cross-section in light of central branch pipe is 0,7-1,0 of area of cross-section in light of cylindrical portion of body of collector fro injection or drainage of gas, and total area of cross section in light of branch pipes for connection to chamber for inlet or outlet of gas of each heat-exchange section of air-based gas cooling apparatus is 0,37-0,62 of area of cross-section in light of cylindrical portion of body of collector for injection or drainage of gas.
EFFECT: decreased metal cost of gas injection or drainage collector and higher manufacturability of its construction, and also decreased hydraulic losses in collector for injection or drainage of gas.
3 dwg, 7 cl
FIELD: power engineering, in particular, engineering of collectors for devices for utilization of gases exhausted by apparatuses primarily used for heating air by combustion products, coming from compressor of gas-turbine plant of gas flow apparatus at compressor stations of main gas pipelines.
SUBSTANCE: air injection or drainage collector of heat exchange block of heat-exchange apparatus like regenerative air heater is made in form of cylindrical ring with opening, in which additional pipe board is welded, while projection on end of pipe board of curvilinear portion of ring, forming an end of opening, is positioned within limits of thickness of pipe board, connection of ring to pipe board in plane of ring cross-section is made within angular range γ=28°-75°, and relation of projection area on aforementioned plane of curvilinear ring portion, forming an end of opening, to projection area on this plane of appropriate end of pipe board, is 0,048-0,172.
EFFECT: decreased mass of construction, high manufacturability of same, possibly lower laboriousness of manufacture, high durability of injection and drainage collector and reliability of its operation due to higher rigidity of construction.
5 cl, 4 dwg
FIELD: heat exchange apparatus; chemical industry and power engineering.
SUBSTANCE: proposed manifold has body with distributor secured on it. Secured to non-magnetic body are magnetic coils; distributor consists of movable and rigidly secured screens made from magnetic material with porous medium placed in between them. Porous medium may be made from foamed plastic and at least 5 rows of elastic balls whose diameter exceeds pitch of screen; it may include at least four layers of ferrite particles at effective diameter equal to diameter of elastic balls.
EFFECT: possibility of performing control of flows in wide temperature range.
4 cl, 9 dwg
FIELD: heat power engineering.
SUBSTANCE: the inventions are intended for heating water and-or steam and may be used in heat power engineering. The boiler plant contains a cylindrical boiler having one course of gases and an internal cylindrical shielded furnace chamber, an air heater, controlled circuits of heating of a heat carrier and fuels, one and more rows of heat exchange pipes, a ring-shaped cylindrical sectional header and a contact economizer. The finned heat exchange pipes are made U-shaped or coiled and form in the end part of the furnace chamber a radiation-convective beam. At that the gas-tightness of the furnace chamber may be ensured either by heat exchange diaphragms connecting the heat exchange pipes or by a heat exchange cylindrical surface. The heat exchange diaphragms, as well as the heat exchange cylindrical surface, which is sealing the furnace chamber and the convective part of the boiler, are spread to the frontal collector. On the collector there are outlet branch-pipes for withdrawal of the heat carrier, from which it is simultaneously possible to take the heat-carrier of several parameters. The boiler plant is countercurrent in respect to a temperature pressure of the furnace chamber and has one and more supporting devices. The back butt of the furnace chamber serves a part of a heating surface of the air-heater together with a branch-pipe of the outlet of the combustion products. The boiler and its heat-exchange pipes are made with in an series heating of the heat-carrier at the speed of its movement in the heat-exchange pipes of 2.15 m\s. The ring-shaped finned boiler header has sections, which are formed by partitions both blank and perforated, one and more frontal covers, one and more pipe plates, on which the heat-exchange pipes of the boiler are fixed. A part of the partitions is made flat and a part of the partitions is made as a ring or a part of a ring. The external finned frontal side of a collector is a part of the heating surface of the air heater. Inventions ensure increased efficiency of the boiler gross load and expansion of its functionalities.
EFFECT: the inventions ensure increased efficiency of the boiler gross load and expansion of its functionalities.
20 cl, 27 dwg
FIELD: heat-power engineering; power engineering; chemical and oil industries.
SUBSTANCE: proposed chamber is provided with rods having section in form of rectangle; rods are mounted over entire perimeter of tube bank in parallel with tubes; vertices of adjacent faces directed towards each other form diffuser and contraction passages. Vertices of faces of adjacent rods directed towards each other may be rounded-off.
EFFECT: reduced hydraulic resistance and enhanced reliability.
2 cl, 3 dwg
FIELD: tubular members of heat exchange apparatuses, manufacture of heat exchange apparatuses, possibly in machine engineering, heat power engineering, transporting systems, refrigerator making industry branch, oil and gas processing.
SUBSTANCE: heat exchange unit is in the form of flat tube with wall thickness S and with inner and outer fins. On both longitudinal outer sides of tube triangular walls and longitudinal grooves are formed. Width and depth of said grooves a = 0.2 - 0.5S and their pitch is in range 3 - 20 mm. Inner fins are in the form of rectangular cross section lengthwise ducts having on longitudinal horizontal walls small-height fins with height in range 0.05h - 0.5h where h - height of lengthwise duct. Width of lengthwise duct B = 0.5h - 0.3h. Outer fins are in the form of cross petal-type fins formed on outer horizontal faces of tube. Cross petal type fins are in the form of rhombs inclined relative to horizontal face of tube in cross direction and they are arranged between longitudinal grooves. On one face of flat tube cross petal-type fins are inclined to one side and on other face fins are inclined to opposite side. Cross petal-type fins are arranged with pitch t = 0.1H - 1.0 H where H - height of cross petal-type fins. Method comprises steps of undercutting layer of material in surface of heat exchanger and bending formed fins by constant bending angle at undercutting by means of cutting tool provided with rotary roller mounted in it.
EFFECT: improved intensity of heat exchange of heat exchanging cell due to increased surface of heat exchange and turbulence, simplified manufacturing process.
FIELD: heat power engineering.
SUBSTANCE: invention can be used in thermoelectric plants and boiler rooms, at transportation and storage of materials whose viscosity depends on temperature. According to invention, proposed device contains pump, external heater, suction branch pipe, pressure pipeline and jet head, and guide member. Guide member is made of cylindrical, conical pipes or their combination, including telescopic pipes and is provided with blind, plate and separate baffles. Guide member is arranged in reservoir between its bottom and surface of fuel oil in reservoir.
EFFECT: increased area of fuel oil heating (in reservoir) to temperature not lower than required temperature without additional consumption of power.
5 cl, 7 dwg
FIELD: heating engineering.
SUBSTANCE: developed heat-exchange surface can be used in heat exchangers, steam and hot water boilers, and boilers-exhausts. Developed heat-exchange surface has heat-exchange surface and set of hollow rods disposed inside holes of heat-exchange surface. Edges of rods are plugged at the sides from where the heat is supplied. Set of hollow rods can be disposed along both sides of heat exchange surface or only at the side from where the heat is supplied. Heat-exchange surface has cylindrical or flat shape.
EFFECT: improved accrual of heat exchange.
7 cl, 12 dwg
FIELD: mechanical engineering, particularly support metal structures used in air cooling plants.
SUBSTANCE: support structure comprises rod-like post members and cross-bars. The cross-bars form horizontal grid-like structure with three longitudinal and transversal belts creating support parts for heat-exchanging sections of gas air-cooling plant supporting. The grid-like structure also creates chambers for fans installation. The fans are mounted on support plates suspended by rigid braces forming four-disc three-dimensional system. The posts include posts of two kinds, namely intermediate and corner ones. Intermediate posts are flat V-shaped. Corner posts are three-dimensional and consist of vertical branches and two inclined branches adjoining lower part of vertical branch. The inclined branches are arranged in two mutually perpendicular planes. Intermediate post and corresponding parts of longitudinal belt form triangle so that distance between post branch ends corresponds to distance between adjacent support plates of chamber for fan installation. Angle between inclined and vertical branches of corner post is determined from a given relation.
EFFECT: reduced material consumption and labor inputs for support structure and support structure components erection.
8 cl, 3 dwg
FIELD: heating engineering, particularly tubular air heater production.
SUBSTANCE: method involves bending metal strip to form tube and performing longitudinal welding thereof. Before strip folding identical depressions with predetermined geometrical parameters are formed on strip surface corresponding to inner tube surface. The strip edges adapted for following welding are free of above depressions. The depressions are formed by cold stamping along the full tube length.
EFFECT: increased manufacturability, possibility to produce tube of small diameter.
FIELD: heat-exchanging equipment, particularly for combustion engine radiators and for other heat-exchanging facilities using gaseous coolant.
SUBSTANCE: heat-exchanger comprises coolant pipes and cooling plates provided with corrugations and cuts. The pipes are formed of brass and copper corrugations extend in longitudinal direction. The corrugations are used as turbulence promoters and define channels for gaseous coolant circulation. The plates are formed of copper strip.
EFFECT: increased heat dissipation.
FIELD: the invention is designed for application in the field of heat-and-power engineering namely in finned heat-exchanging tubes of a gas air cooling apparatus.
SUBSTANCE: the apparatus has the body of a heat exchanging tube and an exterior finning which form in the transverse cooling flow of the exterior heat exchanging environment plots of shading of various intensity in a conditioned flatness normal to the vector of the mentioned flow of the exterior heat exchanging environment and passing through the central longitudinal axle of the tube: complete aerodynamics shading corresponding to the square of projection on the referred flatness of the unit of the length of the actual body of the tube without taking the finning into consideration and incomplete aerodynamics shading corresponding to the total square of projections on the referred flatness of the plots of finning of the unit of the length of the finned tubes limited from each side with a conditional direct line tracing along the tops of the fins minus the square of complete shading produced by the body of the tube without taking the finning into consideration. At that the connection of the squares of projections on the referred flatness of the plots of shading of various intention to their sum forms correspondently (0,30-0,80): 1 and (0,21-0,79):1 and the medium value along the radius of finning of the specific square of aerodynamics shading on the plots of projection of finning on the referred flatness on the unit of the length of the tube composes 0,08-0,55.
EFFECT: allows to increase thermal aerodynamics characteristics of finned heat exchanging tubes and thermal effectiveness of the apparatus in the whole and also to decrease metal consuming and the dimension of the construction of the beam of heat exchanging tubes of the gas air cooling apparatus.
15 cl, 4 dwg
FIELD: heat power engineering.
SUBSTANCE: method comprises setting the core and ribs into the piping blank. The core is hollow, and each of the ribs are made of a hollow body defined by the rotation of a figure composed of the straight sections interconnected to form a hexagon. After setting the ribs, they are subjected to the flexible deformation by bringing the sides of the rib together. The sides of the ribs are perpendicular to the axis of the pipe and point in the direction of the pipe axis.
EFFECT: enhanced efficiency.
FIELD: heat-exchange equipment.
SUBSTANCE: heat-exchange apparatus has supplying and removing collectors integrated by group of heat-exchange tubes having protrusions at their surfaces. Protrusions are made in form of sheets connected by their side surfaces with surface of tube along the length being equal to 1,5-3,0 thickness of sheets. Protrusions are disposed tangentially to surface of tube tat the points of connection of those sheets with tubes. Several sheets are fastened to tube along the perimeter of cross-section to overlap each other. Protrusions on surfaces of heat-exchange tubes are made in form of several sheets of different lengths being fastened along their side surfaces by welding or soldering along the whole length of surfaces of heat-exchange tubes. Protrusions in form of sheets fastened to surfaces of heat-exchange tubes can be also made to have slots and curves relatively sheets at adjacent, neighboring parts.
EFFECT: improved efficiency of heat exchange; provision of adjustment of heat flow.
7 cl, 12 dwg
FIELD: heat engineering; production of methods and the equipment for production of finned pipes of cooling apparatuses or containers.
SUBSTANCE: the invention is intended for application in heat engineering, in particular, at production of finned pipes of cooling apparatuses or containers used for storage of spent fuel of nuclear reactors, and also other materials or objects being the powerful heat sources. The method of production of a heat-exchanging pipe provides for introduction of a core and ribs inside a tubular billet. At that on the internal surface of the tubular billet and on the external surface of the core there are preliminary made hollow longitudinal grooves. The ribs produced separately from the core are made in the form of a strip consisting of two layers, joint among themselves on edges in longitudinal direction or in the form of hollow pipes of oval cross-section, which before installation in the grooves are deformed creating inside excessive pressure, then insert them in the grooves and relieve the pressure. At that the pressure is chosen so, that the relative change of the maximal overall dimension of each rib in transversal direction is equal to: δ≥δmin,
where δ is the value of the relative change of maximum overall dimensions of a rib in the transversal direction, δmin - minimum value of a relative change of the maximum overall dimensions of the rib in the transversal direction, at which assembly of a pipe and creation of elastic deformations in the ribs are ensured. The invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.
EFFECT: the invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.
FIELD: heat exchanging facilities for use in different industries.
SUBSTANCE: invention is designed for use in heat exchanging devices, particularly those with two non-communicating flows of heat carriers with heat exchange through wall. Proposed heat exchanger consists of housing accommodating thin-walled hollow elements with clearances in between, hollow ribs opening into said clearances and passing through inner space of thin-walled hollow elements being made in form of hermetically sealed flat spaces arranged in tandem and interconnected by circular channels, and ribs are made so that in any two adjacent thin-walled hollow elements single rib in one of elements is arranged along axis of heat exchanger, and other element has several ribs arranged over periphery of thin-walled hollow elements.
EFFECT: intensification of heat exchange, reduced overall dimensions and mass of device.
2 cl, 2 dwg