Tandem type high-pressure-resistant fuel and lubricating oil radiator

Abstract

The invention discloses a tandem type high-pressure-resistant fuel oil and lubricating oil radiator which comprises a first radiating core body and a second radiating core body which are connected in parallel or at a certain angle through a fuel oil middle switching section and arranged along the arc-shaped outer surface of a cartridge receiver. The fuel oil channels of the first heat dissipation core body and the second heat dissipation core body are connected in series through a fuel oil middle switching section; a lubricating oil switching section is arranged on the same side of the first heat dissipation core body and the second heat dissipation core body, a lubricating oil inlet section is connected with one end of a lubricating oil channel of the second heat dissipation core body, and a lubricating oil outlet section is connected with one end of a lubricating oil channel of the first heat dissipation core body; the other side of the first heat dissipation core body and the other side of the second heat dissipation core body are provided with lubricating oil connecting and switching sections, and the lubricating oil connecting and switching sections are connected with the other end of the lubricating oil channel of the first heat dissipation core body and the other end of the lubricating oil channel of the second heat dissipation core body respectively. The space utilization rate in an engine cabin is increased, the pipeline complexity is reduced, and meanwhile flow resistance is reduced to enhance heat exchange.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat exchangers, and relates to a series connection type high-pressure-resistant fuel-oil radiator. BACKGROUND

[0002] The aircraft engine radiator is mainly used for cooling the fuel-oil system, uses the aircraft fuel as a cooling medium to cool the circulating fuel oil of the engine lubrication transmission system, ensures that the fuel oil temperature is within a good working condition range, and part of the heated fuel oil enters the combustion chamber for full combustion, and the other part returns to the fuel tank.

[0003] According to the requirements of the fuel-oil radiator of the aircraft engine in the engine, the radiator core body is used for heating different fuel oil paths and cooling fuel oil, if the heat dissipation requirement is large, a single radiator of a certain size cannot meet the heat dissipation requirement, and multiple radiators need to be connected in series or parallel for installation, but due to the complex pipeline, the strict limitation of system space and weight, and the mutual constraint of installation structure space, the engine cabin usually does not have enough space to realize the series-parallel connection and assembly of multiple radiators.

[0004] The existing high-pressure-resistant fuel-oil radiator of the aircraft engine is mainly of a shell-and-tube type, and the shell-and-tube type structure has the following disadvantages: 1. In order to meet the high-pressure-resistant and high-heat-dissipation requirements of the aircraft engine, multiple fuel-oil radiators are used to connect with different fuel oil paths, when the multiple radiators are installed with the engine case, each radiator is separately installed and connected, and the space in the engine cabin cannot be fully utilized; 2. The traditional shell-and-tube radiator includes an end cover, a partition plate, a tube bundle, a valve accessory, a safety bypass and the like, has many types of parts and many external pipelines, and the structure characteristics make it difficult to be arranged according to the type, which is not conducive to the space utilization of the engine case; 3. The traditional radiator needs too many structures of parts, and each structure is fixed by means of argon arc welding, brazing, bolt connection and the like, has many processing procedures, has great inspection difficulty, and has a large number of tube bundles in the core body, and when the flow rate is high, there is a vibration risk in the pipeline channel during operation. SUMMARY

[0005] In order to solve the above problems, the application provides a series connection type high-pressure-resistant fuel-oil radiator, which improves the space utilization rate in the engine cabin, reduces the pipeline complexity, and reduces the flow resistance to strengthen heat exchange.

[0006] The technical scheme adopted by the application is that a first radiator core body and a second radiator core body are connected in parallel or at a certain angle through a fuel oil intermediate adapter and are arranged along the arc-shaped outer surface of the engine case, and the fuel oil channels of the first radiator core body and the second radiator core body are connected in series through the fuel oil intermediate adapter. The same side of the first and second heat dissipation cores is provided with a lubricating oil transfer section, and a lubricating oil bypass safety valve installed in the lubricating oil transfer section divides the lubricating oil transfer section into a lubricating oil inlet section and a lubricating oil outlet section, the lubricating oil inlet section is connected with one end of the lubricating oil channel of the second heat dissipation core, and the lubricating oil outlet section is connected with one end of the lubricating oil channel of the first heat dissipation core. The other side of the first and second heat dissipation cores is provided with a lubricating oil connection transfer section, and the lubricating oil connection transfer section is connected with the other end of the lubricating oil channel of the first heat dissipation core and the other end of the lubricating oil channel of the second heat dissipation core, respectively.

[0007] Further, the fuel intermediate transfer section contains a flow guide structure, and the flow guide structure adopts a grid structure, a honeycomb structure, a needle structure or a mesh plate structure to realize flow equalization and redistribution of the fuel.

[0008] Further, the first and second heat dissipation cores include an upper cover plate and a lower cover plate, and a heat exchange unit is arranged between the upper cover plate and the lower cover plate. The heat exchange unit includes first and second heat dissipation plates stacked in sequence from top to bottom. The top surface and the bottom surface of the first and second heat dissipation plates are provided with heat dissipation flow channels. The heat dissipation flow channel at the bottom surface of each first heat dissipation plate and the heat dissipation flow channel at the top surface of the second heat dissipation plate at the bottom thereof form a first fluid channel, and the heat dissipation flow channel at the bottom of each second heat dissipation plate and the heat dissipation flow channel at the top surface of the first heat dissipation plate at the bottom thereof form a second fluid channel. The first fluid channel is a fuel channel, and the second fluid channel is a lubricating oil channel; or the first fluid channel is a lubricating oil channel, and the second fluid channel is a fuel channel.

[0009] Further, the left and right sides of each first and second heat dissipation plate are correspondingly provided with a fuel inlet and a fuel outlet of a fuel channel. One end of the fuel intermediate transfer section is connected with the fuel outlets of all fuel channels of the second heat dissipation core, and the other end is connected with the fuel inlets of all fuel channels of the first heat dissipation core.

[0010] Further, the front and rear sides of each first and second heat dissipation plate are correspondingly provided with a lubricating oil inlet and a lubricating oil outlet of a lubricating oil channel. The lubricating oil inlet section of the lubricating oil transfer section is connected with the lubricating oil inlets of all lubricating oil channels of the second heat dissipation core, and the lubricating oil outlet section of the lubricating oil transfer section is connected with the lubricating oil outlets of all lubricating oil channels of the first heat dissipation core. The lubricating oil connection transfer section is connected with the lubricating oil outlets of all lubricating oil channels of the second heat dissipation core and the lubricating oil inlets of all lubricating oil channels of the first heat dissipation core.

[0011] Further, the heat dissipation flow channels on the first and second heat dissipation plates are Z-shaped or S-shaped flow channel structures, the first and second heat dissipation plates comprise water-drop rib column structures, staggered corrugated structures or combined structures of rib columns and intermittent flow guide fins.

[0012] Further, the oil transfer section is a bypass pipeline structure arranged in a shape following the oil flow.

[0013] Further, the end of the first heat dissipation core is provided with a fuel outlet joint, the end of the second heat dissipation core is provided with a fuel inlet joint, the end of the oil inlet section of the oil transfer section is provided with an oil inlet joint, and the end of the oil outlet section of the oil transfer section is provided with an oil outlet joint.

[0014] Further, the fuel inlet joint is connected with the fuel inlets of all fuel channels of the second heat dissipation core through a fuel outlet transfer section, and the fuel outlet joint is connected with the fuel outlets of all fuel channels of the first heat dissipation core through a fuel inlet transfer section.

[0015] Further, the oil transfer section is internally integrated with a mounting sleeve, and the oil bypass safety valve is mounted in the mounting sleeve.

[0016] The beneficial effects of the present application are as follows: 1. A series type fuel and oil heat dissipation device structure is provided, two heat dissipation cores are connected in series at a certain angle by a transfer section, the heat dissipation device can be arranged in a shape following the engine case shell, the valve accessories are integrated in the side transfer section, the external pipeline structure is reduced, the number of parts is reduced, the pipeline complexity is reduced, the case space utilization rate is improved, and the problem of low space utilization rate in the existing multiple heat dissipation device combination connection is solved.

[0017] 2. The fuel intermediate transfer section has a flow equalization function, can adopt grid, honeycomb, needle, perforated plate and other structures to realize flow equalization and redistribution of fuel, and can strengthen the fuel intermediate transfer section under high pressure conditions.

[0018] 3. The heat dissipation plate of the core is processed by double-sided etching, and the heat dissipation plate and the partition plate are integrated and designed, so that the number of core assembly parts is simplified and the processing period is shortened.

[0019] 4. The heat dissipation plate comprises water-drop rib column structures and staggered corrugated structures, and has the characteristics of low flow resistance and strong heat exchange.

[0020] 5. The oil bypass valve of the mounting sleeve of the oil adapter section can be 3D printed and numerically controlled machining; the fuel intermediate adapter section and the heat dissipation core are connected by melting welding, a total of 8 welds (there are two contact surfaces between the fuel intermediate adapter section and the heat dissipation core, and each contact surface has 4 welds), the weld positions are all located on the outer surface of the radiator, the welding types are few, the welding accessibility is good, the welding difficulty is small and convenient for inspection. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, below the drawings needed to be used in the embodiments or prior art description will be briefly introduced, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 It is a series type high pressure resistant fuel and oil radiator structure of the present application.

[0023] Figure 2 It is a front view schematic diagram of the series type high pressure resistant fuel and oil radiator installed on the surface of the engine case (not including the oil adapter section) of the present application.

[0024] Figure 3 It is a top view schematic diagram when the series type high pressure resistant fuel and oil radiator is installed on the surface of the engine case of the present application.

[0025] Figure 4 It is an overall assembly explosion diagram of the series type high pressure resistant fuel and oil radiator of the present application.

[0026] Figure 5a It is a first structure schematic diagram of the flow equalization structure inside the intermediate adapter section of the present application.

[0027] Figure 5b It is a second structure schematic diagram of the flow equalization structure inside the intermediate adapter section of the present application.

[0028] Figure 5c It is a third structure schematic diagram of the flow equalization structure inside the intermediate adapter section of the present application.

[0029] Figure 5d It is a fourth structure schematic diagram of the flow equalization structure inside the intermediate adapter section of the present application.

[0030] Figure 6 It is an assembly explosion diagram of the core of the series type high pressure resistant fuel and oil radiator of the present application.

[0031] Figure 7It is a partial view of a series high-pressure-resistant fuel and lubricating oil radiator core of the present application.

[0032] Figure 8 It is a fuel working flow line diagram of a series high-pressure-resistant fuel and lubricating oil radiator of the present application.

[0033] Figure 9 It is a lubricating oil working flow line diagram of a series high-pressure-resistant fuel and lubricating oil radiator of the present application.

[0034] Figure 10a It is a first structure diagram of the flow channel inside the heat dissipation plate of the present application.

[0035] Figure 10b It is a second structure diagram of the flow channel inside the heat dissipation plate of the present application.

[0036] Figure 10c It is a third structure diagram of the flow channel inside the heat dissipation plate of the present application.

[0037] Figure 11 It is an integrated structure of the radiator bypass pipe and the lubricating oil switching section of the present application.

[0038] In the figure, 1. fuel inlet switching section, 2. first heat dissipation core, 3. fuel intermediate switching section, 3-1. grid structure, 4. second heat dissipation core, 5. fuel outlet switching section, 6. lubricating oil switching section, 7. lubricating oil connecting switching section, 8. lubricating oil inlet joint, 9. lubricating oil outlet joint, 10. fuel outlet joint, 11. fuel inlet joint, 12. lubricating oil bypass safety valve, 13. upper cover plate, 14. first heat dissipation plate, 15. second heat dissipation plate, 16. lower cover plate. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Embodiment 1 A series high-pressure-resistant fuel and lubricating oil radiator, as shown in Figures 1-4 , comprises: a first heat dissipation core 2 and a second heat dissipation core 4, the first heat dissipation core 2 and the second heat dissipation core 4 are connected in parallel or at a certain angle through a fuel intermediate switching section 3 and are arranged along the arc-shaped outer surface of the engine case, and the fuel passages of the first heat dissipation core 2 and the second heat dissipation core 4 are connected in series through the fuel intermediate switching section 3; The lubricating oil transfer section 6 is located on one side of the first heat dissipation core 2 and the second heat dissipation core 4. The lubricating oil transfer section 6 is equipped with a lubricating oil bypass safety valve 12, which divides the lubricating oil transfer section 6 into two parts: a lubricating oil inlet section and a lubricating oil outlet section. The lubricating oil inlet section is connected to one end of the lubricating oil channel of the second heat dissipation core 4, and the lubricating oil outlet section is connected to one end of the lubricating oil channel of the first heat dissipation core 2. The lubricating oil connection adapter section 7 is located on the other side of the first heat dissipation core 2 and the second heat dissipation core 4. The lubricating oil connection adapter section 7 is connected to the other end of the lubricating oil channel of the first heat dissipation core 2 and the other end of the lubricating oil channel of the second heat dissipation core 4, respectively.

[0041] In some embodiments, a fuel outlet connector 10 is provided at the end of the first heat dissipation core 2, and a fuel inlet connector 11 is provided at the end of the second heat dissipation core 4. An oil inlet connector 8 is provided at the end of the oil inlet section of the oil transfer section 6, and an oil outlet connector 9 is provided at the end of the oil outlet section.

[0042] like Figure 8 As shown, the fuel medium flows into the second heat dissipation core 4 through the fuel inlet connector 11, is guided by the fuel intermediate transfer section 3, and then enters the first heat dissipation core 2, and finally flows out from the fuel outlet connector 10.

[0043] like Figure 9 As shown, the lubricating oil medium flows into the lubricating oil inlet section of the lubricating oil transfer section 6 through the lubricating oil inlet connector 8, is guided by the second heat dissipation core 4, enters the first heat dissipation core 2 through the lubricating oil connection transfer section 7, and finally flows into the lubricating oil outlet section of the lubricating oil transfer section 6 and flows out from the lubricating oil outlet connector 9.

[0044] In some embodiments, the fuel outlet connector 10 is connected to the first heat dissipation core 2 via the fuel inlet adapter section 1, and the fuel inlet connector 11 is connected to the second heat dissipation core 4 via the fuel outlet adapter section 5.

[0045] In some embodiments, the lubricating oil transfer section 6 has an integrated mounting sleeve inside, and the lubricating oil bypass safety valve 12 is installed inside the mounting sleeve.

[0046] In some embodiments, such as Figures 5a-5d As shown, the fuel intermediate transfer section 3 includes a flow guiding structure. The flow guiding structure can adopt a grid structure 1-3, a honeycomb structure, a needle structure or a mesh structure to achieve uniform flow and redistribution of fuel. At the same time, it strengthens the fuel intermediate transfer section 3 under high pressure conditions. Compared with increasing the thickness, the weight can be reduced by more than 10%, and the pressure resistance can be increased to 20MPa.

[0047] In the field of military aero-engine, plate-fin heat exchanger or shell-and-tube heat exchanger is usually used, and aluminum alloy and stainless steel are selected as the material. The plate-fin heat exchanger usually adopts brazing, and the processing mode determines that it cannot withstand high pressure working conditions above 10 MPa. The shell-and-tube usually adopts argon arc welding, electron beam welding and brazing, and the structure characteristics of the cylinder determine that it can withstand high pressure working conditions, but the structure form is a cylinder, and bypass pipelines need to be erected on both sides of the cylinder, and there are many space limitation factors.

[0048] In the embodiment of the present application, the first and second rectangular heat dissipation cores 2 and 4 are connected in series at a certain angle, the heat dissipation area is increased, and the heat exchange efficiency is improved; the bypass pipeline is combined with the oil transfer section 6, the accessories are integrated inside the transfer section, and are arranged on the side of the core after the integration, the volume of the heat dissipation device is reduced, the space utilization rate is improved, and the compact shape realizes the strengthening of the core connection. The design idea of each step is progressive and connected, and the processability of the structure and the realizability of the process are also considered.

[0049] In some embodiments, the connection mode between the fuel outlet joint 10, the fuel inlet joint 11 and the fuel inlet transfer section 1, the fuel outlet transfer section 5, and the connection mode between the oil inlet joint 8, the oil outlet joint 9 and the oil transfer section 6, include but are not limited to bolt flange connection, internal and external thread connection, fusion welding connection and brazing connection.

[0050] In some embodiments, as shown in Figures 6-7 The first and second heat dissipation cores 2 and 4 include upper cover plates 13 and lower cover plates 16, and heat exchange units are arranged between the upper cover plates 13 and the lower cover plates 16; The heat exchange units include first and second heat dissipation plates 14 and 15 stacked in order from top to bottom; The top surface and the bottom surface of each of the first and second heat dissipation plates 14 and 15 are provided with heat dissipation flow channels; The heat dissipation flow channel at the bottom of each of the first heat dissipation plates 14 and the heat dissipation flow channel at the top of the second heat dissipation plate 15 below it form a first fluid passage, and the heat dissipation flow channel at the bottom of each of the second heat dissipation plates 15 and the heat dissipation flow channel at the top of the first heat dissipation plate 14 below it form a second fluid passage; The first fluid passage is a fuel passage, and the second fluid passage is an oil passage; or, the first fluid passage is an oil passage, and the second fluid passage is a fuel passage.

[0051] In some embodiments, the left and right sides of each of the first and second heat dissipation plates 14 and 15 are provided with fuel inlets and fuel outlets corresponding to fuel passages; The fuel inlet joint 11 is connected with the fuel inlets of all fuel passages of the second heat dissipation core 4; One end of the fuel intermediate adapter 3 is connected with the fuel outlets of all fuel channels of the second heat sink core 4, and the other end is connected with the fuel inlets of all fuel channels of the first heat sink core 2. The fuel outlet joint 10 is connected with the fuel outlets of all fuel channels of the first heat sink core 2.

[0052] In some embodiments, the front and back sides of each of the first and second heat sink plates 14 and 15 are provided with oil inlet and outlet of the oil channel. The oil inlet section of the oil adapter 6 is connected with the oil inlets of all oil channels of the second heat sink core 4, and the oil outlet section of the oil adapter 6 is connected with the oil outlets of all oil channels of the first heat sink core 2. The oil connection adapter 7 is connected with the oil outlets of all oil channels of the second heat sink core 4 and the oil inlets of all oil channels of the first heat sink core 2.

[0053] In some embodiments, the heat sink flow channel on the first and second heat sink plates 14 and 15 is Z-shaped or S-shaped flow channel structure, so that the fuel and oil can be fully heat exchanged, and the heat exchange efficiency of the heat exchanger is improved.

[0054] As shown in Figures 10a-10c The first and second heat sink plates 14 and 15 include water droplet rib structure, staggered corrugated structure, and combination structure of rib and intermittent flow guide fin, which has flow guiding effect. The water droplet rib structure has small flow resistance; the staggered corrugated structure can enhance the disturbance of the fluid and obtain stronger heat transfer coefficient; the combination structure of rib and intermittent fin can strengthen the heat transfer coefficient of the fluid, reduce the flow resistance by flow guide fin, and has the advantages and characteristics of water droplet rib structure and staggered corrugated structure; all the three structures have high pressure resistance.

[0055] Figure 10c The combination structure of middle rib and intermittent flow guide fin mainly has the following characteristics: The heat exchange coefficient is improved by destroying the flow boundary layer and the thermal boundary layer, the heat exchange area is also increased, the heat transfer is strengthened, the weight of the plate is reduced, and the high heat dissipation requirement is realized in the limited space; the fin width is 0.8mm-1mm, the fin spacing is controlled to be 1.5mm-2mm, and the length of the intermittent fin is 1mm-2mm; the width, length and spacing of the fin are controlled to reduce the resistance generated by the structure to the fluid, and the fin with a certain width and length can improve the welding contact area of the plate and the plate during diffusion welding, improve the welding rate and meet the 20MPa pressure resistance requirement; the curved fins are different in length, the long curved fin is used to guide and distribute the fluid at the inlet of the heat exchange plate, and the short curved fin in the bending area is used to redistribute and guide the fluid flowing out of the intermittent fin, so as to reduce the flow resistance caused by the structure.

[0056] As shown in Figure 11 The oil transfer section 6 is a bypass pipeline structure arranged in a random shape, the inlet section of the oil transfer section 6 is connected with all the oil passage inlets of the second heat dissipation core 4, and the outlet section of the oil transfer section 6 is connected with all the oil passage outlets of the first heat dissipation core 2. The bypass pipe and the core and the oil transfer section are designed integrally, which improves the integrity of the structure of the radiator, and the bypass pipe, the transfer section and the core structure are connected by brazing, which plays a role of mutual strengthening.

[0057] The integrated structure of the bypass pipe and the transfer section can be processed by 3D printing, and is connected with the surface of the core by brazing, which increases the welding area, reduces the number of part welds, and simplifies the welding process and difficulty.

[0058] In some embodiments, the mounting mode of the series high-pressure-resistant fuel oil radiator includes but is not limited to: a. The mounting seat is reserved in the engine case, and the mounting seat is also extended on the series high-pressure-resistant fuel oil radiator, and the mounting seat is fixed by bolts; b. The welding joint is reserved in the engine case, and the corresponding welding joint is also extended on the series high-pressure-resistant fuel oil radiator, and the welding joint is fixed by melting welding.

[0059] For the large-flow aero-engine oil cooling system, the mounting space and the core connection form of the radiator are combined to meet the high-pressure-resistant, large-flow and high-heat-dissipation fuel oil radiator processing requirements in the limited space. The working temperature range of the aero-engine fuel oil radiator is-45℃-250℃, the fuel flow can be more than 100L / min, and the pressure resistance requirement is usually 20MPa. According to the design of the embodiment of the present application, a series high-pressure-resistant fuel oil radiator test piece has been processed, and the flow resistance, heat dissipation and pressure resistance performance test has been carried out, and the results are shown in Table 1.

[0060] Table 1 Comparison of test data of the present application and traditional structure The above descriptions are only the preferable embodiments of the present application, not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A series-type high-pressure resistant lubricating oil radiator, comprising a first heat dissipation core (2) and a second heat dissipation core (4), characterized in that, The first heat dissipation core (2) and the second heat dissipation core (4) are connected in parallel or at a certain angle through the fuel intermediate transfer section (3) and are set along the arc-shaped outer surface of the casing. The fuel passages of the first heat dissipation core (2) and the second heat dissipation core (4) are connected in series through the fuel intermediate transfer section (3). The first heat sink (2) and the second heat sink (4) are provided with an oil transfer section (6) on the same side. The oil bypass safety valve (12) installed inside the oil transfer section (6) divides the oil transfer section (6) into two parts: an oil inlet section and an oil outlet section. The oil inlet section is connected to one end of the oil channel of the second heat sink (4), and the oil outlet section is connected to one end of the oil channel of the first heat sink (2). The first heat sink (2) and the second heat sink (4) are provided with an oil connection adapter section (7) on the other side. The oil connection adapter section (7) is connected to the other end of the oil channel of the first heat sink (2) and the other end of the oil channel of the second heat sink (4).

2. The series-type high-pressure resistant lubricating oil radiator according to claim 1, characterized in that, The intermediate fuel transfer section (3) contains a flow guiding structure. The flow guiding structure adopts a grid structure (1-3), honeycomb structure, needle structure or mesh structure to achieve fuel flow equalization and redistribution.

3. The series-type high-pressure resistant lubricating oil radiator according to claim 1, characterized in that, The first heat dissipation core (2) and the second heat dissipation core (4) include an upper cover plate (13) and a lower cover plate (16), and a heat exchange unit is provided between the upper cover plate (13) and the lower cover plate (16); The heat exchange unit includes a first heat dissipation plate (14) and a second heat dissipation plate (15) stacked from top to bottom. The top and bottom surfaces of the first heat sink (14) and the second heat sink (15) are provided with heat dissipation channels; The heat dissipation channel on the bottom surface of each first heat dissipation plate (14) and the heat dissipation channel on the top surface of the second heat dissipation plate (15) at its bottom form a first fluid channel, and the heat dissipation channel on the bottom surface of each second heat dissipation plate (15) and the heat dissipation channel on the top surface of the first heat dissipation plate (14) at its bottom form a second fluid channel. The first fluid passage is a fuel passage and the second fluid passage is a lubricating oil passage; or, the first fluid passage is a lubricating oil passage and the second fluid passage is a fuel passage.

4. The series-type high-pressure resistant lubricating oil radiator according to claim 3, characterized in that, Each of the first heat sink plate (14) and the second heat sink plate (15) is provided with a fuel inlet and a fuel outlet for the fuel channel on the left and right sides respectively. One end of the fuel intermediate transfer section (3) is connected to the fuel outlet of all fuel channels of the second heat dissipation core (4), and the other end is connected to the fuel inlet of all fuel channels of the first heat dissipation core (2).

5. A series-type high-pressure resistant lubricating oil radiator according to claim 3, characterized in that, Each of the first heat sink plate (14) and the second heat sink plate (15) is provided with an oil inlet and an oil outlet for the oil channel on the front and rear sides respectively. The lubricating oil inlet section of the lubricating oil transfer section (6) is connected to the lubricating oil inlet of all the lubricating oil channels of the second heat sink (4), and the lubricating oil outlet section of the lubricating oil transfer section (6) is connected to the lubricating oil outlet of all the lubricating oil channels of the first heat sink (2). The lubricating oil connection adapter section (7) is connected to the lubricating oil outlets of all lubricating oil channels of the second heat dissipation core (4) and the lubricating oil inlets of all lubricating oil channels of the first heat dissipation core (2).

6. The series-type high-pressure resistant lubricating oil radiator according to claim 3, characterized in that, The heat dissipation channels on the first heat sink (14) and the second heat sink (15) are Z-shaped or S-shaped channel structures. The first heat sink (14) and the second heat sink (15) include a water droplet rib structure, an interlaced corrugated structure, or a combination structure of ribs and intermittent guide fins with a flow guiding function.

7. The series-type high-pressure resistant lubricating oil radiator according to claim 1, characterized in that, The lubricating oil transfer section (6) is a bypass pipeline structure arranged according to the shape.

8. A series-type high-pressure resistant lubricating oil radiator according to claim 4, characterized in that, The first heat dissipation core (2) is provided with a fuel outlet connector (10) at its end, and the second heat dissipation core (4) is provided with a fuel inlet connector (11) at its end; the lubricating oil transfer section (6) is provided with a lubricating oil inlet connector (8) at its end and a lubricating oil outlet connector (9) at its end.

9. A series-type high-pressure resistant lubricating oil radiator according to claim 8, characterized in that, The fuel inlet connector (11) is connected to the fuel inlet of all fuel passages of the second heat sink (4) through the fuel outlet adapter section (5), and the fuel outlet connector (10) is connected to the fuel outlet of all fuel passages of the first heat sink (2) through the fuel inlet adapter section (1).

10. A series-type high-pressure resistant lubricating oil radiator according to claim 1, characterized in that, The lubricating oil transfer section (6) has an integrated installation sleeve inside, and the lubricating oil bypass safety valve (12) is installed inside the installation sleeve.

Images