CN201420626Y - Waste gas recirculation cooler with ridge rings for medium and heavy vehicles - Google Patents
Waste gas recirculation cooler with ridge rings for medium and heavy vehicles Download PDFInfo
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- CN201420626Y CN201420626Y CN2009201085904U CN200920108590U CN201420626Y CN 201420626 Y CN201420626 Y CN 201420626Y CN 2009201085904 U CN2009201085904 U CN 2009201085904U CN 200920108590 U CN200920108590 U CN 200920108590U CN 201420626 Y CN201420626 Y CN 201420626Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model relates to a waste gas recirculation cooler with ridge rings for medium and heavy vehicles. The cooler comprises a tube casing, tube plates mounted at the two ends of the tube casingas well as a water inlet tube and a water outlet tube which are on the side surfaces of the tube casing; a plurality of heat exchange tubes for waste gas circulation are mounted between the two tubeplates at the two ends of the tube casing; the two tube plates are connected with an air inlet tube box and an air outlet tube box respectively; the tube casing is formed by a metal plate with the thickness less than 2 mm; the section of the tube casing is rectangular, and the shape thereof is rectangular as well; the tube casing is formed by connecting one segment or a plurality of segments of tube casings; the total contour lengths of both the single-segment tube casing or the multi-segment tube casing are greater than one time of the width or the height thereof; and the tube casing and theair inlet tube box or the air outlet tube box as well as all the segments of the multi-segment tube casing are connected via ridge rings. In the utility model, split-type tube casings as well as the tube casing and the tube boxes are connected via ridge rings, so that the strength of the cooler is increased; the structural design is more compact; and the overall performance is improved. In addition, the cooler is provided with ridge rings, thereby reducing the assembly difficulty of the cooler and improving the machining precision at the same time.
Description
Technical field
The utility model relates to a kind of medium and heavy Vehicular waste gas recycle cooler with the ridge ring, is in a kind of being applied to, the heat exchanger of heavy-duty car engine exhaust recirculated cooling system.
Background technique
At automotive field, the engine exhaust recirculated cooling system with cooler in continuous improvement, with the standard of the motor vehicle exhaust emission that adapts to increasingly stringent; For medium and heavy diesel engine, the cost of cooler for recycled exhaust gas wants high than LD-diesel, therefore when designing for the client and processing cooler, not only its Performance And Reliability to be fully taken into account, the complexity and the cost problem of processing will be taken into account simultaneously.
The application of exhaust gas recirculation cooling technology is one of effective measures of automobile industry reduction motor vehicle exhaust emission.The exhaust gas recirculation cooling technology is to add cooler in the gas recirculation system, after the waste gas of the part cycling and reutilization that motor car engine is discharged cools off by cooler for recycled exhaust gas earlier, the firing chamber that passes back to motor again and a kind of technology of burning after fresh air fully mixes.This technology is utilized and is contained a large amount of chemically inactive gas (CO in the waste gas
2, N
2, H
2O) have this characteristic of higher specific heat and reduce NO
xGeneration.Because NO
xFormation condition be high-temperature oxygen-enriched, and the introducing of the low waste gas of temperature makes mixed gas thermal capacity increase on the one hand, makes the mixed gas of the same amount then required heat of same temperature that raises increase, thereby effectively reduces maximum combustion temperature, has departed from NO
xHigh temperature generate the district; Waste gas is to the also corresponding concentration that reduces oxygen of the dilution of fresh air on the other hand, thereby suppresses NO effectively
xGeneration.Therefore in gas recirculation system, being provided with efficiently, cooler for recycled exhaust gas can make the exhaust emissions amount of automobile satisfy the requirement of strict rules.
At present, the cooler used of vehicle engine exhaust gas recirculation system has two big classes.One class is a strip-fin oil cooler, and a class is a shell and tube cooler, and wherein the type application with shell and tube cooler is the most extensive.The operation that affiliation influences the whole cooling system of motor that adds owing to cooler for recycled exhaust gas, even can whole motor be impacted, therefore not only require the cooler compact efficient, the more important thing is and to guarantee its reliability, consider from the cost aspect simultaneously, to produce the product of high reliability with the most practical technology, for the client saves the batch supply that cost guarantees product simultaneously.
Because the running environment of medium and heavy car is more abominable, so the reliability of cooler for recycled exhaust gas is extremely important, if leaking appears in running in cooler, with direct injury to damaging property of motor.Because cooler for recycled exhaust gas is divided into gas side and two passages of water side, pass through high-temperature gas in the heat exchanging tube, the interior freezing mixture of shell by motor, if leaking appears in the gas side, freezing mixture is entered in the heat exchanging tube, and then make cooler enter vent systems, will destroy the normal operation of gas circuit, thereby cause destruction motor; If leaking appears in coolant side, the joint that is freezing mixture by shell and water pipe leaks in the environment, then can cause the continuous loss of freezing mixture, finally make the whole cooling system of motor ineffective, can cause very big injury to motor equally, therefore, take place, must guarantee cooler integral intensity and reliability for fear of this situation.
The medium and heavy diesel locomotive that at present designs at home and produce is with in the cooler for recycled exhaust gas, shell adopts foundry goods more, make the overall structure of cooler relatively heavier, take the bigger space of motor, the specific power of the cooler of this form is lower, do not give full play to the heat exchange effect of per unit volume intercooler, and the ability of this cooler upgrading is relatively poor.
Summary of the invention
In order to address this problem, the utility model proposes a kind of medium and heavy diesel locomotive cooler for recycled exhaust gas with the ridge ring, the shell of this cooler is the rectangular cross-section, shell is surrounded but not foundry goods by sheetmetal, can effectively utilize the space, make full use of the space in the shell, compact layout heat exchanger pipe bundle, the performance of cooler is met the demands, and have the ability of upgrading; According to the length scale of cooler, the shell of this cooler can select to adopt split-type design, and connects by the ridge ring between the split shell, has reduced difficulty of processing, has improved machining accuracy, can effectively guarantee the reliability of shell; Simultaneously, also connect by the ridge ring between the bobbin carriage of shell and end, tube sheet is fixed between shell and the bobbin carriage, thereby the global reliability of cooler is improved, can satisfy the requirement of motor from Performance And Reliability two aspects, satisfy the requirement of the Abgasgesetz of increasingly stringent.
The purpose of this utility model is achieved in that a kind of medium and heavy Vehicular waste gas recycle cooler with the ridge ring, comprise: as the shell of main body be installed in the tube sheet at shell two ends and the intake pipe and the outlet pipe of shell side, many heat exchanging tubes of circulation waste gas are installed between two tube sheets at described shell two ends, two tube sheets are connected with the exhaust bobbin carriage with the air inlet bobbin carriage respectively, described shell is to be surrounded by the sheet metal of thickness less than 2 millimeters, described shell cross section is a rectangle, external form also is a rectangle, described shell can be a single hop, also can be formed by connecting by multistage, no matter what be its total contour length of single hop shell or multistage shell greater than 1 times is wide or high, between described shell and air inlet bobbin carriage or the exhaust bobbin carriage, connect by the ridge ring between each section shell of multistage shell.
The beneficial effect that the utility model produces is: the medium and heavy Vehicular waste gas recycle cooler of band ridge ring, because after adding the ridge ring, can realize welding fabrication of cooler, and present medium and heavy Vehicular waste gas recycle cooler majority adopts twice or more times is welded, therefore the design method of cooler can improve the manufacturing efficiency of cooler in the utility model, is particularly suitable for producing in batches.
The split design of the medium and heavy Vehicular waste gas recycle cooler rectangle shell of band ridge ring, with respect to the shell cast-in-block mode that generally adopts, can guarantee that cooler global design on the identical appearance space basis is compacter on the one hand, effectively utilize the space in the shell, the layout of tube bank is more reasonable, thereby improves the overall performance of cooler.The cooler shell adopts the split design, has greatly reduced the difficulty of processing of longer cooler shell, and the split shell has improved the intensity of shell by the connection of ridge ring; In the end of cooler, shell is connected by the ridge ring with bobbin carriage, and tube sheet is turnup structure, is fixed between shell and the bobbin carriage, increases the join strength between the three, and the global reliability of heat exchanger is improved.
Because chiller applications is on medium and heavy diesel locomotive, general structure is longer, in order to reduce the thermal stress of expanding with heat and contract with cold and causing, arrange expansion joint in cooler shell end, adopt the split design, just can on short shell, process expansion joint, greatly reduced the difficulty of processing, simultaneously can improve the precision of processing, improve the reliability that shell connects, also improve the cooler whole reliability simultaneously.Cooler promptly satisfies reliability requirement, and performance requirement is satisfied again, thereby effectively reduces the temperature of EGR gas, has reduced the discharging of oxynitrides in the waste gas, and environmental protection is made a due contribution.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 the utility model embodiment one, three described cooler for recycled exhaust gases;
The local figure of Fig. 2 the utility model embodiment one described cooler for recycled exhaust gas;
Tube sheet schematic representation described in Fig. 3 the utility model embodiment one;
The cooler for recycled exhaust gas of Fig. 4 the utility model embodiment one, seven described Twin channel, the flat-shaped groove heat exchange tube of use;
Fig. 5 the utility model embodiment two described ridge ring schematic representation;
Fig. 6 the utility model embodiment four described ridge ring schematic representation;
Fig. 7 the utility model is installed the schematic representation of the cooler for recycled exhaust gas of embodiment's four described ridge rings;
Fig. 8 the utility model embodiment five, seven described cooler for recycled exhaust gases that have three sections shells of expansion joint and use the circular groove heat exchanging tube;
Fig. 9 the utility model embodiment six described cooler for recycled exhaust gases;
Figure 10 the utility model embodiment eight described flat-shaped groove heat exchange tube schematic representation.
Embodiment
Embodiment one:
Present embodiment is a kind of medium and heavy Vehicular waste gas recycle cooler with the ridge ring, as shown in Figure 1, 2.Described cooler comprises: as the shell 1 of main body, 2 and be installed in the tube sheet 9 at shell two ends and the intake pipe 5 and the outlet pipe 6 of shell side, the many heat exchanging tubes 4 of circulation waste gas are installed between two tube sheets at described shell two ends, two tube sheets are connected with exhaust bobbin carriage 8 with air inlet bobbin carriage 7 respectively, described shell is to be surrounded by the sheet metal of thickness less than 2 millimeters, described shell cross section is a rectangle, external form also is a rectangle, described shell can be a single hop, also can be formed by connecting by multistage, no matter what be its total contour length of single hop shell or multistage shell greater than 1 times is wide or high, between described shell and air inlet bobbin carriage or the exhaust bobbin carriage, connect by ridge ring 3 between each section shell of multistage shell.
Enclosing the shell made from sheetmetal and replace the cast inblock shell, is not simple replacement.Adopt the cast-in-block package types, can meet the demands the period not high in emission regulation demands, and still along with the more and more strictness of Abgasgesetz, this shell is cooler very big drawback of existence in upgrading of casting.Because it is limited that the space of cooler is installed on motor, and the thickness of foundry goods is bigger, under identical spatial volume, the space is difficult to expansion in the foundry goods, has therefore limited the increase of the effective heat exchange area of tube bank in the shell.If under the condition that identical heat exchanger pipe bundle is arranged, the heat exchange tube external space of the shell that the employing sheetmetal surrounds is bigger, has reduced the flow resistance of freezing mixture by cooler, and is favourable to EGR (exhaust gas recirculation) system.Perhaps, can make and pass through more freezing mixture in the cooler, the whole heat exchange effect of cooler is improved because the space is bigger.Because medium and heavy Vehicular waste gas recycle cooler profile is rectangle normally, relative and the width and highly much bigger of its length, so the intensity of length direction must be bigger, to be unlikely to distortion when occurring too big colding and heat succeed each other just to stand shell, so that damage shell.
Because the profile of the described shell of present embodiment is that the cross section is the long strip of rectangle, so present embodiment can be designed to single hop with shell, also can be designed as multistage.So-called single hop shell is exactly that shell has an one-piece metal sheet, so-called multistage shell be shell on length direction, block shell into a plurality of weak points, by 3 connections of ridge ring, Fig. 1,2,4,6,9 is two sections designs between each section, Fig. 8 is three sections designs.This segmentation manufacturing method of linking together then can effectively solve the manufacturing process problem of long shell.
Shell adopts split-type design, has greatly reduced the difficulty of processing of longer cooler shell, has improved machining accuracy simultaneously; Because the structure of cooler is longer, for solving the problem that the long tube shell expands with heat and contract with cold, expansion joint is set on the shell, reduce the thermal stress of expanding with heat and contract with cold and causing.
Shell is provided with claims hole 13,23, and water pipe 5,6 directly inserts in the shell, and by the fixing position of water pipe of annular projection 51,61, the water pipe shown in the present embodiment is a straight tube, and equally as required, water pipe can be the form of bend pipe.
Be illustrated in figure 3 as the tube sheet that is adopted among the embodiment one, be turnup structure, heat exchanging tube is by the through hole on the tube sheet 93, and the welding back links together with tube sheet.Bending 92 is inserted in the ridge ring through hole, and flange 91 is connected with the ridge ring on one side, with bobbin carriage be connected on one side, be fixed between bobbin carriage and the ridge ring, improved join strength.
Present embodiment can be the single channel cooler, and the shell that has used sheetmetal to be bent into is different from the casting shell of traditional medium and heavy Vehicular waste gas recycle cooler.The shell of sheetmetal manufacturing has many advantages with respect to the casting shell: manufacturing process is simple, and production process is polluted less, realizes automatic production easily, and quality is easy to guarantee.If adopt the shell design of segmentation, the length of single shell is shorter, is easier to processing, and can ensures the quality of products, and is suitable for the manufacturing of bulk article.
Present embodiment also can be a pair of channel cooler, as shown in Figure 4.When multiple cylinder engine (such as six cylinder engine) is divided into two groups, and when adopting common turbosupercharger, generally to consider to adopt the Twin channel cooler, bobbin carriage has two passages 72,73; This mode general using engine exhaust pulse realizes exhaust gas recirculation function.Among this embodiment, cooler adopts split-type design equally, and is divided into left shell 1, right shell 2 two-part, and shell adopts the effect of split design identical with example one.
The cooler shell adopts the split design, just can process expansion joint on the short shell in end, has greatly reduced the difficulty of processing, can improve the precision of processing simultaneously, also just improves the reliability that shell connects, and has improved the cooler whole reliability simultaneously.This split-type design can be enhanced productivity, and is suitable for the batch process of product.The design of cooler rectangle shell, can effectively utilize space in the shell, make the layout of tube bank compacter, cooler promptly satisfies reliability requirement and satisfies performance requirement again, thereby effectively reduce the temperature of EGR gas, reduce the discharging of oxynitrides in the waste gas, satisfied the environmental requirement of increasingly stringent.
Owing in cooler, adopt the ridge ring, strengthened the whole intensity of cooler, cooler is more useful on the medium and heavy truck, because the general environment of applications of truck is more abominable, not only load-carrying is big, and the road surface of operation jolts very much, so this cooler is the cooler for recycled exhaust gas that is suitable for as medium and heavy car.
Embodiment two:
Present embodiment is embodiment one improvement, is the refinement of embodiment about the ridge ring.The described ridge ring of present embodiment is a rectangular metal ring, and there is a belt convex ridge at the outer side surface middle part of rectangular metal ring, forms the ring surface of two grafting shells or air inlet bobbin carriage, exhaust bobbin carriage in the both sides of convex ridge.
Be illustrated in figure 5 as the described ridge ring of present embodiment, comprise annular projection 32 and two ring surfaces 31,33.The ridge ring has following effect: the first, and the ridge ring is the link between the split shell; The second, the ridge ring is the link between shell and the bobbin carriage; The 3rd, after the split shell connects into an integral body by the ridge ring, can strengthen the bulk strength of shell; The 4th, projection in the ridge ring makes things convenient for the assembling of ridge ring, plays location and spacing effect, in two side plane insertion tube shells or the bobbin carriage; The 5th, the end tube sheet between bobbin carriage and ridge ring, ridge ring and the effect of playing fixed tube sheet after bobbin carriage is connected; The 6th, because the ridge ring has been installed in the cooler many places, make the support strength of cooler integral frame increase, improve the shock resistance of cooler; In addition, when shell is longer, need to add the circulation length that deflection plate improves cooler, for the shell of integral body, deflection plate unusual difficulty when assembling.Adding the ridge ring can be fixed on deflection plate on the ridge ring, deflection plate can be fixed on earlier on the shell before the assembling tube bank, convenient for assembly.After installing the ridge ring additional, the whole assembling difficulty of medium and heavy vehicle cooler reduces, can a welding fabrication; And present medium and heavy vehicle cooler majority is by twice even twice above welding process moulding, can reduce the number of times of welding behind the adding ridge ring, enhances productivity, and satisfies the needs of producing in batches.
Embodiment three:
Present embodiment is the refinement of the foregoing description, is the refinement about the shell end of using the ridge ring.The described shell of present embodiment is plugged on the ring surface of ridge ring after by expanding end.
In order to strengthen the join strength of ridge ring and shell, the end of split shell is the enlarging design, shown among Fig. 1 11,12,21,22, makes things convenient for the connection of the two; Equally, the ridge ring is directly inserted the connecting end 71,81 of bobbin carriage, make the integral body of cooler connect more firm.
Embodiment four:
Present embodiment is embodiment one a reconfiguration, is about the refinement of ridge ring, sees Fig. 6.Described ridge ring is a rectangular metal ring, and there is a belt convex ridge at the inner side surface middle part of rectangular metal ring, forms two insertion pipe shell ring surfaces 34,35 in the both sides of convex ridge, and shell directly inserts in the ridge ring, and convex ridge plays position-limiting action; When the ridge ring was used for pipe end connecting tube shell-and-tube case, ridge ring one side was the inner annular face, and opposite side is outside ring surface, and shell is plugged on the inner annular face of ridge ring, and the outside ring surface of ridge ring is plugged on the internal edge of end face bobbin carriage; In addition, be used for the ridge ring of pipe end connecting tube shell-and-tube case, also can be identical with the ridge ring that connects shell.The mode of above-mentioned employing ridge ring connected element can strengthen the effect of cooler integral intensity.
The internal surface of the described ridge ring of present embodiment has boss, makes things convenient for shell to insert, and accurately locatees, as shown in Figure 7.Shell inserts the inside of ridge ring, has avoided the technology of shell enlarging, has reduced processing link.
Embodiment five:
Present embodiment is the improvement of the foregoing description about shell.Arrange expansion joint on the described shell, described expansion joint is along the set continuous arc convex of the wide and high direction of shell, as shown in Figure 8.
Present embodiment adopts a kind of facility of expansion joint 14,24, is arranged on the shell, is a continuous arc convex, and the rib that processes one arc convex on the shell of metal thin-wall can play the effect of expanding with heat and contract with cold as expansion joint exactly.This expansion joint can absorb the amount of deformation that expands with heat and contract with cold and cause effectively.Because the applied environment of cooler for recycled exhaust gas is more abominable, flow through the waste gas of high temperature in the heat exchanging tube, flow through the freezing mixture of low temperature in the shell, therefore make and produce different thermal expansion amounts between tube bank and the shell, thereby cause thermal stress, produce flexural stress producing on the heat exchanging tube to produce on tensile stress, the tube sheet on pressure stress, the shell, tube bank, tube sheet and shell form the stressed stream of a sealing.Because the different stress that produce of each parts swell increment may cause single component failure or produce destruction in the joint of tube sheet, and cooler is leaked, and may destroy the normal operation of motor when serious.
As shown in Figure 8, left and right shell is provided with expansion joint, especially when cooler for recycled exhaust gas is applied on the medium and heavy car, in order to satisfy the heat exchange efficiency of cooler, the length of general cooler is longer, the thermal stress that thermal expansion amount difference between this parts causes more can not be ignored, therefore, in the split shell of present embodiment, all be provided with expansion joint on left side shell and the right shell, can absorb effectively owing to the different different situations of swell increment that cause of tube bank, reduce the generation of thermal stress, prevent the destruction of cooler parts with being heated of shell.Identical with it, right shell adopts identical design, has expansion joint, and role is identical.
Embodiment six:
Present embodiment is the improvement of the foregoing description.What described intake pipe and outlet pipe were connected with shell is a bend pipe, and described outlet pipe is provided with a branched pipe; Described suction tude case comprises: the suction tude flange, and what be connected with described suction tude flange is to subtract the coupling device, is air inlet bobbin carriage end socket with what subtract that the coupling device is connected, described air inlet bobbin carriage end socket is connected with the ridge ring of air inlet bobbin carriage one side.Described steam outlet pipe case comprises: the steam outlet pipe flange, and described steam outlet pipe flange is connected with the bobbin carriage end socket of giving vent to anger, and the described bobbin carriage end socket of giving vent to anger is connected with the ridge ring of bobbin carriage one side of giving vent to anger.
Present embodiment comprises split shell 1,2, water pipe 5,6, ridge ring 3, support 110,120, end bobbin carriage 7,8 and heat exchanging tube and several parts of tube sheet (not shown) as shown in Figure 9.The heat exchanging tube that present embodiment adopted can adopt round screw thread groove heat exchange tube or flat-shaped groove heat exchange tube according to the difference of emission request; Ridge ring 3 roles between bobbin carriage and the shell, between shell and the shell are identical with embodiment's one median ridge ring role; Wherein intake pipe 5, outlet pipe 6 are the bend pipe design, this design is directly determined by the layout of cooler in motor, and the main effect of the branched pipe 62 on the water pipe 6 is to be used for steam discharge, cooler is in heat transfer process, and the temperature of freezing mixture raises, and may cause the partial vaporization phenomenon, heat exchange to cooler is very unfavorable, when the water side pressure is elevated to a certain degree, the freezing mixture of vaporization can be discharged from branched pipe 62, and cooler is normally played a role; Air inlet bobbin carriage 7 is not integrated design, by suction tude flange 75, subtract coupling device 74, suction tude end socket 76 several sections are formed, this Combination Design can make the more compact structure of cooler, the suction tude flange is directly connected on the motor, to subtract the coupling device and be directly connected to the suction tude end socket, reduced the EGR pipeline that connects motor and cooler for recycled exhaust gas, this design has effectively utilized the confined space of motor.Exhaust bobbin carriage 8 is the integrated design, because cooler needs to connect afterwards equipment such as modulating valve, need not to be designed to the form of air inlet bobbin carriage according to the layout of motor.The design and implementation example one of shell is identical in the cooler.The global design of present embodiment is compacter, not only can make motor satisfy strict emission request, and can effectively save the space, and the bulk strength of cooler is big, the reliability height.Cooler can pass through a welding fabrication, has improved manufacturing efficiency, satisfies the demand of producing in batches.
Embodiment seven:
Present embodiment is the improvement of the foregoing description about heat exchanging tube.The described heat exchanging tube of present embodiment is the round screw thread groove heat exchange tube.
The described heat exchanging tube of present embodiment is the round screw thread groove heat exchange tube, and shown in Fig. 2,8, by high-temp waste gas, the zone between split shell and the heat exchanging tube is a coolant channel in the heat exchanging tube 8 of cooler for recycled exhaust gas.When high-temperature gas passes through the round screw thread groove heat exchange tube, run into the inhibition at spiral salient position, flow direction changes, produce complicated secondary flow vortex flow, simultaneously also formed vortex, increased the turbulivity of waste gas, especially increased disturbance the near wall region boundary layer in the back of spiral salient, destroy or attenuate the boundary layer of fluid, thereby strengthened heat exchange; Simultaneously, the enhancing of flow disturbance makes transition reynolds number reduce, and promptly takes place ahead of time from the transformation of laminar flow to turbulent flow, and strong turbulent motion makes dirt suffer fierce erosion in pipe, and is less scaling, is beneficial to cleaning.
Cooler can satisfy the emission standard of Europe three or even Ou Si owing to adopt round screw thread groove pipe; On this basis, do not change the profile of cooler, can improve the efficient of heat exchanging tube with tube bank by the profile that changes heat exchanging tube, thereby satisfy higher emission request.
Embodiment eight:
Present embodiment is the improvement of above-mentioned one to five embodiment about heat exchanging tube.The described heat exchanging tube of present embodiment is flat-shaped groove heat exchange tube.
Present embodiment adopts flat-shaped groove heat exchange tube 4, shown in Fig. 4,10, residing two surfaces up and down, the long limit in heat exchanging tube cross section all are furnished with groove and bulge, it is an equidistant helix that the axis of its further groove and bulge links together, and adopts flat-shaped groove pipe better effects if than employing round screw thread groove pipeline on heat-exchange performance; The advantage of flat-shaped cross section spiral heat exchange tube is: at first, under the constant prerequisite of the volume that guarantees cooler and exhaust gas flow, just under the situation that the heat exchanging tube section area is constant, the perimeter of section of flat pipe is affirmed the perimeter of section greater than pipe, thereby the heat exchange area of flat pipe is greater than the heat exchange area of pipe, and then improved the heat exchange area of whole cooler, make cooler reach higher heat exchange effect; The bulge of flat-shaped heat exchanging tube is played the effect of fixed support heat exchanging tube between two heat exchanging tubes, prevent that simultaneously heat exchanging tube from deforming owing to expanding with heat and contract with cold, and adopts the cooler for recycled exhaust gas of flat-shaped heat exchanging tube can satisfy the above emission request of Ou Si.
Below just shown the Placement of the split type shell of several typical medium and heavy use for diesel engine cooler for recycled exhaust gases of the present utility model, wherein can revise about the profile of cooler shell, the number of shell segmentation etc.; The branch body structure of shell, reduced the difficulty of processing of longer cooler effectively, improved machining accuracy, thereby guarantee the weld strength of the integral body of cooler, be applicable to produce in batches and use, this design has improved the reliability of cooler, guarantees that cooler realizes its function, makes motor car engine satisfy the emission regulation demands of increasingly stringent.
It should be noted that at last, below only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to the preferred arrangement scheme, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model (such as being provided with of the shape of the profile of the profile of housing, water pipe, end bobbin carriage, ridge ring inside and outside grafting ring surface etc.), and not break away from the spirit and scope of technical solutions of the utility model.
Claims (8)
1. medium and heavy Vehicular waste gas recycle cooler with the ridge ring, comprise: as the shell of main body be installed in the tube sheet at shell two ends and the intake pipe and the outlet pipe of shell side, many heat exchanging tubes of circulation waste gas are installed between two tube sheets at described shell two ends, two tube sheets are connected with the exhaust bobbin carriage with the air inlet bobbin carriage respectively, it is characterized in that, described shell is to be surrounded by the sheet metal of thickness less than 2 millimeters, described shell cross section is a rectangle, external form also is a rectangle, described shell can be a single hop, also can be formed by connecting by multistage, no matter what be its total contour length of single hop shell or multistage shell greater than 1 times is wide or high, between described shell and air inlet bobbin carriage or the exhaust bobbin carriage, connect by the ridge ring between each section shell of multistage shell.
2. cooler according to claim 1 is characterized in that, described ridge ring is a rectangular metal ring, and there is a belt convex ridge at the outer side surface middle part of rectangular metal ring, forms the ring surface of two grafting shells or air inlet bobbin carriage, exhaust bobbin carriage in the both sides of convex ridge.
3. cooler according to claim 2 is characterized in that, described shell is plugged on the ring surface of ridge ring after by expanding end.
4. cooler according to claim 1 is characterized in that, described ridge ring is a rectangular metal ring, and there is a belt convex ridge at the inner side surface middle part of rectangular metal ring, forms the ring surface of two grafting shells or air inlet bobbin carriage, exhaust bobbin carriage in the both sides of convex ridge.
5. according to claim 3 or 4 described coolers, it is characterized in that, arrange expansion joint on the described shell, described expansion joint is along the set continuous arc convex of the wide and high direction of shell.
6. cooler according to claim 5 is characterized in that, what described intake pipe and outlet pipe were connected with shell is a bend pipe, and described outlet pipe is provided with a branched pipe; Described suction tude case comprises: the suction tude flange, and what be connected with described suction tude flange is to subtract the coupling device, is air inlet bobbin carriage end socket with what subtract that the coupling device is connected, described air inlet bobbin carriage end socket is connected with the ridge ring of air inlet bobbin carriage one side; Described steam outlet pipe case comprises: the steam outlet pipe flange, and described steam outlet pipe flange is connected with the bobbin carriage end socket of giving vent to anger, and the described bobbin carriage end socket of giving vent to anger is connected with the ridge ring of bobbin carriage one side of giving vent to anger.
7. cooler according to claim 6 is characterized in that, described heat exchanging tube is the round screw thread groove heat exchange tube.
8. cooler according to claim 6 is characterized in that, described heat exchanging tube is flat-shaped groove heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201085904U CN201420626Y (en) | 2009-06-09 | 2009-06-09 | Waste gas recirculation cooler with ridge rings for medium and heavy vehicles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201085904U CN201420626Y (en) | 2009-06-09 | 2009-06-09 | Waste gas recirculation cooler with ridge rings for medium and heavy vehicles |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576029B (en) * | 2009-06-09 | 2011-06-15 | 锦州美联桥汽车部件有限公司 | Exhaust gas recirculation cooler for medium and heavy-duty vehicle with ridge ring |
| CN107228578A (en) * | 2017-08-01 | 2017-10-03 | 芜湖精达机械制造有限公司 | A kind of novel heat exchanger |
| CN110480132A (en) * | 2019-09-19 | 2019-11-22 | 张家港市恒强冷却设备有限公司 | The welding processing of nuclear power motor cooler |
| CN112334730A (en) * | 2018-06-22 | 2021-02-05 | 巴斯夫欧洲公司 | Heat exchanger |
-
2009
- 2009-06-09 CN CN2009201085904U patent/CN201420626Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576029B (en) * | 2009-06-09 | 2011-06-15 | 锦州美联桥汽车部件有限公司 | Exhaust gas recirculation cooler for medium and heavy-duty vehicle with ridge ring |
| CN107228578A (en) * | 2017-08-01 | 2017-10-03 | 芜湖精达机械制造有限公司 | A kind of novel heat exchanger |
| CN112334730A (en) * | 2018-06-22 | 2021-02-05 | 巴斯夫欧洲公司 | Heat exchanger |
| CN110480132A (en) * | 2019-09-19 | 2019-11-22 | 张家港市恒强冷却设备有限公司 | The welding processing of nuclear power motor cooler |
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Granted publication date: 20100310 Effective date of abandoning: 20090609 |