Oil cooler with H-shaped vapor chamber heat transfer unit structure

Abstract

The utility model discloses an oil cooler of an H-shaped vapor chamber heat transfer unit structure. The oil cooler comprises a heat exchange core body, a lubricating oil inlet and outlet device and a fuel oil inlet and outlet device. The heat exchange core body consists of an H-shaped vapor chamber and a harmonica-shaped tube which are arranged in a closed cavity; each harmonica-shaped tube is vertically arranged; the harmonica-shaped tubes are transversely arranged at intervals to form a longitudinal row; the multiple columns of harmonica-shaped tubes are longitudinally arranged; two separated through holes are formed in the middle of the interior of a lubricating oil collecting pipe of the lubricating oil inlet and outlet device, and the lower ends of the two through holes communicate with lubricating oil flow channels formed by the H-shaped vapor chamber and the outer wall face of the harmonica-shaped pipe correspondingly. The fuel inlet and outlet device comprises a front end cover assembly and a rear end cover assembly. And the front end cover assembly and the rear end cover assembly are communicated with the plurality of openings of the harmonica-shaped tube through the closed cavity of the heat exchange core body. According to the oil cooler, the flow resistance of fluid is reduced, meanwhile, heat exchange between lubricating oil and fuel oil can be efficiently achieved, the heat exchange efficiency of the oil cooler is improved, and meanwhile the oil cooler can bear very high pressure.

Description

Technical Field

[0001] The utility model relates to an oil cooler, in particular to an oil cooler with an H-shaped heat pipe heat transfer unit structure, which is used to improve the enhanced heat transfer efficiency of the existing oil cooler while ensuring the strength of the oil cooler. Background Art

[0002] Oil coolers are widely used in the fields of aviation, ships, automobiles, construction machinery, etc. With the continuous innovation of technology, the design optimization of oil coolers puts forward higher requirements for lubricating oil. It not only needs to have the functions of lubrication, heat dissipation and cleaning, but also needs to control its temperature within a strict working condition range. As a key device for controlling the temperature of lubricating oil, the oil cooler has a very broad application prospect.

[0003] At present, the types and designs of oil coolers are various. Among them, the shell-and-tube oil cooler is the most common one. The shell-and-tube oil cooler reduces the temperature of the lubricating oil by flowing a cooling medium (such as fuel or air) through a heat dissipation device, and then exchanging heat between the heat dissipation fins or heat pipes and the fluid. However, the existing shell-and-tube oil coolers generally have problems such as low heat dissipation efficiency and large flow resistance, and cannot meet the working conditions of high temperature, high pressure and high flow rate. Moreover, the shell-and-tube oil cooler also has the problem of difficult cleaning.

[0004] In order to improve the problems of difficult cleaning and relatively poor cooling efficiency of the shell-and-tube oil cooler, Chinese invention patent CN104625864B discloses a fluorine evaporation type detachable shell-and-tube oil cooler, which includes a square shell, long strip-shaped waist holes are axially opened on both sides of the square shell, long waist-shaped flange seats are arranged along the edges of the long strip-shaped waist holes, the long waist-shaped flange seats are fixedly connected with a detachable long waist-shaped flange cover plate through bolts, and the connection part is sealed through a flange cover plate gasket; an inner rubber cushion plate, a filling cushion plate and an outer rubber cushion plate are filled in sequence from inside to outside between the long strip-shaped waist holes of the square shell and the long waist-shaped flange cover plate to seal the long strip-shaped waist holes. This technology adopts the design of a square shell and is provided with a detachable inspection and cleaning hole, which solves the problem of difficult disassembly and cleaning. This technology connects both ends of the heat exchange tube to a first tube box and a second tube box with a plurality of cavity structures, extends the flow path of the refrigerant, sets a baffle plate to form an S-shaped flow path for the cutting oil, and enables the refrigerant and the cutting oil to fully contact and exchange heat in a limited volume, effectively improving the heat exchange efficiency. However, this technology is generally still a long strip-shaped structure, and the strength of the oil cooler itself still needs to be improved, and it is difficult to be competent in some occasions where the strength of the oil cooler itself is required to be relatively high; moreover, only by extending the flow path to improve the cooling efficiency is limited. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide an oil cooler with an H-shaped heat pipe heat transfer unit structure for the problems existing in the prior art, which can reduce the fluid flow resistance while improving the heat exchange efficiency of the oil cooler, especially having strong pressure-bearing capacity, so as to ensure the stable operation of engineering machinery equipment.

[0006] The purpose of the present utility model is achieved by the following technical solutions:

[0007] An oil cooler with an H-shaped heat pipe heat transfer unit structure includes a heat exchange core, a lubricating oil inlet and outlet device, and a fuel inlet and outlet device; the heat exchange core is composed of an H-shaped heat pipe and a corrugated tube arranged in a sealed cavity; there are multiple corrugated tubes; each corrugated tube is evenly provided with a plurality of through holes at equal intervals along the thickness direction; each corrugated tube is arranged vertically; multiple corrugated tubes are arranged at intervals horizontally to form a longitudinal row; multiple rows of corrugated tubes are arranged longitudinally; there are multiple H-shaped heat pipes, and each H-shaped heat pipe is longitudinally connected by two side wing plates and a middle waist plate, and the open sides of each H-shaped heat pipe are respectively welded to the corrugated tubes at both ends, and multiple H-shaped heat pipes are arranged at intervals or continuously between two rows of corrugated tubes; the lubricating oil inlet and outlet device includes a lubricating oil outlet, a lubricating oil collecting pipe, and a lubricating oil inlet; two through holes separated by a partition are arranged in the middle of the lubricating oil collecting pipe, and the two through hole ends of the lubricating oil collecting pipe are respectively connected to the lubricating oil inlet and the lubricating oil outlet; the lower ends of the two through holes are respectively communicated with the lubricating oil flow channels formed by the outer wall surfaces of the H-shaped heat pipe and the corrugated tube; the fuel inlet and outlet device includes a front end cover assembly and a rear end cover assembly; the front end cover assembly and the rear end cover assembly are respectively located on both sides of the heat exchange core; the front end cover assembly and the rear end cover assembly are communicated with multiple openings of the corrugated tube 7 through the sealed cavity of the heat exchange core. The front end cover assembly is divided into two non-communicating cavities; the two cavities are respectively sealed and communicated with the fuel inlet and the fuel outlet; the rear end cover assembly is divided into two communicating cavities.

[0008] To further achieve the purpose of the present utility model, preferably, the front end cover assembly is mainly composed of a front end plate, a front partition, a front end cover, and a fuel side end plate; the front end cover is an arc-shaped structure or a square structure with multiple spaced plates inside, and the front end cover, the front end plate, and the fuel side end plate form an open cavity structure on one side. The spaced plates provided on the front end cover evenly divide the cavity, and multiple through holes are evenly provided on the spaced plates. A front partition is arranged in the middle of the cavity to divide the cavity into two non-communicating parts.

[0009] Preferably, the through holes are circular holes or square holes.

[0010] Preferably, the rear end cover assembly mainly consists of a rear end plate, a rear partition plate, and a rear end cover; the rear end cover is an arc-shaped structure or a square structure with multiple spaced plates inside, and the rear end cover and the rear end plates at both ends form an open cavity structure on one side. The spaced plates inside the rear end cover evenly divide the cavity, and multiple through holes are evenly arranged on the spaced plates to connect the cavities separated by different spaced plates; multiple rear partition plates are arranged in the middle of the cavity, and each rear partition plate is processed with an opening.

[0011] Preferably, the sealed cavity of the heat exchange core is composed of the fuel front main sheet and the fuel rear main sheet on both sides, the lubricating oil inlet side support plate at the front end, the lubricating oil outlet side support plate at the rear end, and the lubricating oil upper housing and the lubricating oil lower housing at the upper and lower ends, which are hermetically connected.

[0012] Preferably, both the fuel front main sheet and the fuel rear main sheet are obtained by machining or die stamping; openings for installing and fixing the cross-section holes of multiple rows of corrugated tubes are arranged on the main bodies of the fuel front main sheet and the fuel rear main sheet, and rectangular holes for installing and fixing with the lubricating oil inlet side support plate and the lubricating oil outlet side support plate are arranged on both sides; both the lubricating oil upper housing and the lubricating oil lower housing are bent structures, and one end of the bending of the lubricating oil upper housing and the lubricating oil lower housing covers the upper and lower ends of the heat exchange core; the other end of the bending respectively covers the upper and lower sides at the front end of the heat exchange core; multiple openings are arranged on one side of the upper end of the heat exchange core covered by the lubricating oil upper housing.

[0013] Preferably, the corrugated tube is a plate with multiple through holes spaced along the thickness direction; the cross-sectional shape of the through holes of the corrugated tube is rectangular, circular, or semi-circular and their combinations; the spacing between the through holes in the corrugated tube is 0.3 - 0.4 mm, and the width from the through holes of the corrugated tube to the outer edge is 0.3 - 0.5 mm.

[0014] Preferably, the middle through hole in the through holes of the corrugated tube is rectangular, and the through holes at both ends are semi-circular.

[0015] Preferably, the horizontal spacing between adjacent two corrugated tubes in the horizontal spaced arrangement of multiple corrugated tubes is 8 - 12 mm; the vertical spacing between adjacent two corrugated tubes in the vertical arrangement of multiple rows of corrugated tubes is 35 - 45 mm.

[0016] Preferably, the thicknesses of the two wing plates and the middle waist plate of the H-shaped heat pipe are 0.4 - 0.6 mm and 1.5 - 2.5 mm respectively; the cross-section of the waist plate of the H-shaped heat pipe is oblong or V-shaped.

[0017] Preferably, the waist plate of the H-shaped heat pipe is composed of two V-shaped cross-sections arranged at intervals; a V-shaped inner cavity with a spacing of 0.5 - 1.5 mm is formed between the two waist plates, and acetone working fluid is injected into the cavity.

[0018] Compared with the prior art, the present utility model has the following advantages:

[0019] 1) High efficiency heat exchange and extremely high pressure bearing capacity: Multiple groups of harmonica tubes and H-type heat spreader structures are used inside the oil cooler. This structure effectively increases the heat conduction area and improves the heat exchange efficiency of the oil cooler, so that it can effectively cool the lubricating oil and heat the fuel oil, achieving a good heat exchange effect. At the same time, the harmonica tubes are arranged longitudinally, and the middle waist plate of the H-type heat spreader is also designed longitudinally. In particular, the opening edge of each H-type heat spreader of the utility model is welded to the harmonica tubes at both ends respectively. With the longitudinal arrangement of the harmonica tubes, the heat exchange core of the utility model forms a longitudinal and transverse flow channel mesh arrangement structure, which is almost similar to a solid structure, so that the heat exchange core has extremely high pressure bearing capacity.

[0020] 2) Cross-flow channel design: The oil cooler adopts a cross-flow channel design, which enables the fuel and lubricating oil to flow inside the oil cooler without interfering with each other, and to exchange heat more fully.

[0021] 3) Good sealing: The lubricating oil inlet and outlet are connected to the lubricating oil collecting pipe through threads, and sealing rings are installed at the threaded connections to prevent fluid leakage, forming a good sealing effect and ensuring safe and reliable flow of lubricating oil inside the oil cooler.

[0022] 4) The heat exchange core has a solid structure: The harmonica tube is mainly made by hot extrusion, with high strength and hardness. It can effectively withstand the pressure gradient changes inside the oil cooler and external vibrations, ensuring the structural solidity and safety of the oil cooler.

[0023] 5) High reliability: The H-type heat spreader has a 1mm thick V-shaped inner cavity processed inside, and an appropriate amount of acetone is injected into the cavity, and then the waist plate is completely sealed, and a reliability test is carried out in a constant temperature water bath to ensure its good sealing. This design makes the H-type heat spreader have high reliability and durability, which can effectively ensure the long-term stable operation of the oil cooler.

[0024] 6) High-quality material performance: The oil cooler is made of Al6061 aluminum alloy, which has good corrosion resistance, high strength and high thermal conductivity, which can ensure the durability and stability of the oil cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall appearance assembly of the oil cooler with an H-type heat transfer unit structure.

[0026] Figure 2 This is an exploded view of the oil cooler with an H-type heat transfer unit structure.

[0027] Figure 3 for Figure 2 Schematic diagram of the lubricating oil manifold.

[0028] Figure 4 is Figure 2 a schematic diagram of the front end cover assembly.

[0029] Figure 5 is Figure 2 a schematic diagram of the rear end cover assembly.

[0030] Figure 6 is Figure 2 the front view of the front main fuel sheet.

[0031] Figure 7 is Figure 2 the front view of the heat exchange core

[0032] Figure 8 is Figure 2 the top view of the heat exchange core.

[0033] Figure 9 is Figure 2 the left view of the heat exchange core.

[0034] Figure 10 is Figure 2 the front view of the corrugated tube.

[0035] Figure 11 is Figure 2 the isometric view of the H-shaped heat sink.

[0036] The figure shows: the upper lubricating oil housing 1, the rear end cover assembly 2, the rear end plate 2-1, the rear partition 2-2, the rear end cover 2-3, the rear main fuel sheet 3, the lubricating oil inlet side support plate 4, the lower lubricating oil housing 5, the H-shaped heat sink 6, the corrugated tube 7, the front main fuel sheet 8, the fuel inlet 9, the front end cover assembly 10, the front end plate 10-1, the front partition 10-2, the front end cover 10-3, the fuel side end plate 10-4, the fuel outlet 11, the lubricating oil outlet side support plate 12, the lubricating oil outlet 13, the lubricating oil manifold 14, the lubricating oil baffle 14-1, the lubricating oil inlet 15. Specific embodiments

[0037] To better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0038] As Figures 1 - 11As shown in the figure, an oil cooler with an H-shaped heat pipe heat transfer unit structure is used in a lubricating oil cooling system, and includes a heat exchange core, a lubricating oil inlet and outlet device, and a fuel inlet and outlet device; the heat exchange core is composed of an H-shaped heat pipe 6 and a corrugated pipe 7 arranged in a sealed cavity; there are multiple corrugated pipes 7; each corrugated pipe is evenly provided with a plurality of through holes at uniform intervals in the cross section; each corrugated pipe is vertically arranged; multiple corrugated pipes are horizontally spaced to form a longitudinal row; multiple rows of corrugated pipes are longitudinally arranged; there are multiple H-shaped heat pipes, and each H-shaped heat pipe 6 is longitudinally connected by two side wing plates and a middle waist plate. The open side of each H-shaped heat pipe 6 is welded to the corrugated pipe 7, and each H-shaped heat pipe 6 is arranged between two rows of corrugated pipes at intervals or continuously; the lubricating oil inlet and outlet device includes a lubricating oil outlet 13, a lubricating oil manifold 14, and a lubricating oil inlet 15; two through holes separated by a partition are provided in the middle of the lubricating oil manifold 14, and the two through hole ends of the lubricating oil manifold 14 are respectively connected to the lubricating oil inlet 15 and the lubricating oil outlet 13; the lower ends of the two through holes are respectively communicated with the lubricating oil flow channels formed by the outer wall surfaces of the H-shaped heat pipe 6 and the corrugated pipe 7; the fuel inlet and outlet device includes a front end cover assembly 10 and a rear end cover assembly 2; the front end cover assembly 10 and the rear end cover assembly 2 are respectively located on both sides of the heat exchange core; the front end cover assembly 10 and the rear end cover assembly 2 are communicated with a plurality of openings of the corrugated pipe 7 through the sealed cavity of the heat exchange core; the front end cover assembly 10 is divided into two non-communicating cavities; the two cavities are respectively sealed and communicated with the fuel inlet 9 and the fuel outlet 11; the rear end cover assembly 2 is divided into two communicating cavities;.

[0039] There are two through holes separated by a partition in the middle of the lubricating oil manifold 14, and the two through hole ends of the lubricating oil manifold 14 are respectively connected to the lubricating oil inlet 15 and the lubricating oil outlet 13; one implementation manner in which the lower ends of the two through holes are respectively communicated with the lubricating oil flow channels formed by the outer wall surfaces of the H-shaped heat pipe 6 and the corrugated pipe 7 is as Figure 2 and 3 As shown in the figure, a rectangular through hole with a side length of 1-3 mm, preferably 2 mm, is opened at the middle position of the lubricating oil manifold 14; this hole can also be other shapes, such as a hexagon or a circle. The upper side of the lubricating oil baffle 14-1 is inserted into this through hole to form a barrier sheet. It can also not be a through hole, that is, two non-communicating holes without the lubricating oil baffle 14-1 are provided; the lower side of the lubricating oil baffle 14-1 is connected to the lubricating oil upper shell 1, and the lubricating oil baffle is placed between the lubricating oil manifold and the lubricating oil upper shell 1 by means of high-strength welding. When the high-temperature lubricating oil flows into the right chamber of the lubricating oil manifold 14 from the lubricating oil inlet 15, under the forced blocking action of the lubricating oil baffle 14-1, the lubricating oil flows into the lubricating oil flow channels formed by the outer wall surfaces of the H-shaped heat pipe 6 and the corrugated pipe 7 through the lubricating oil upper shell 1.

[0040] One implementation manner in which the front end cover assembly 10 is divided into two non-communicating cavities is as Figure 2 and 4As shown, the front end cover assembly 10 is mainly composed of a front end plate 10-1, a front partition plate 10-2, a front end cover 10-3, and a fuel side end plate 10-4. The front end cover 10-3 is an arc-shaped structure or a square structure with multiple spacer plates inside. The front end cover 10-3, the front end plate 10-1, and the fuel side end plate 10-4 form an open cavity structure on one side. The spacer plates provided inside the front end cover 10-3 evenly divide the cavity. Multiple through holes are evenly provided on the spacer plates to connect the cavities separated by different spacer plates; preferably, the through holes are round holes or square holes; a front partition plate 10-2 is provided in the middle of the cavity to divide the cavity into two non-connected parts. The front end plate 10-1, the front partition plate 10-2, the front end cover 10-3, and the fuel side end plate 10-4 are connected by a high-strength welding process. The multiple through holes evenly provided on the spacer plates of the front end cover 10-3 can efficiently utilize the internal space of the end cover assembly, and at the same time divert the low-temperature fuel flowing in from the fuel inlet into the inner channel of the corrugated pipe and make the fuel evenly distributed in each end cover inner cavity.

[0041] One implementation of dividing the rear end cover assembly 2 into two interconnected cavities is as Figure 2 and 5 As shown, the rear end cover assembly 2 is mainly composed of a rear end plate 2-1, a rear partition plate 2-2, and a rear end cover 2-3 components. The rear end cover 2-3 is an arc-shaped structure or a square structure with multiple spacer plates inside. The rear end cover 2-3 and the rear end plates 2-1 at both ends form an open cavity structure on one side. The spacer plates provided inside the rear end cover 2-3 evenly divide the cavity. Multiple through holes are evenly provided on the spacer plates to connect the cavities separated by different spacer plates, facilitating the uniform flow of fuel inside the rear end cover; multiple rear partition plates 2-2 are provided in the middle of the cavity, and each rear partition plate 2-2 is processed with an opening, preferably a window-shaped opening. While the rear partition plate 2-2 supports the arched rear cover assembly 2, it controls the fuel flow rate to make the low-temperature fuel flow in a front-back-front horizontal U-shaped manner in the tube-side flow channel.

[0042] The sealed cavity of the heat exchange core is preferably composed of the fuel front main sheet 8 and the fuel rear main sheet 3 on both sides, the lubricating oil inlet side support plate 4 at the front end, the lubricating oil outlet side support plate 12 at the rear end, and the lubricating oil upper housing 1 and the lubricating oil lower housing 5 at the upper and lower ends, which are hermetically connected. As Figure 2 and 6As shown, both the front fuel main piece 8 and the rear fuel main piece 3 are processed by machining or die stamping. An opening for installing and fixing the cross-section holes of multiple rows of harmonica tubes is arranged in the middle body of the front fuel main piece 8 and the rear fuel main piece 3, and rectangular holes for installing and fixing with the lubricating oil inlet side support plate and the lubricating oil outlet side support plate are arranged on both sides. The upper and lower ends of the front fuel main piece 8 and the rear fuel main piece 3 are bent and processed into a rectangular serrated structure, which not only supports the oil cooler housing but also reduces the self-weight of the oil cooler, meeting the requirements of lightweight design. Both the upper lubricating oil housing 1 and the lower lubricating oil housing 5 are bent structures. One end of the bend of the upper lubricating oil housing 1 and the lower lubricating oil housing 5 covers the upper and lower ends of the heat exchange core; the other end of the bend covers the upper and lower sides of the front end of the heat exchange core respectively. Multiple openings are provided on one side of the upper lubricating oil housing 1 covering the upper end of the heat exchange core.

[0043] As Figure 1 and 2 shown, the fuel inlet 9 and the fuel outlet 11 are connected with the front end cover assembly 10 by threaded connection, and the lubricating oil inlet 15 and the lubricating oil outlet 13 are connected with the lubricating oil manifold 14 by threaded connection. The advantage of threaded connection is its good reliability and sealing performance. Through threaded connection, a firm connection between fasteners can be achieved, and at the same time, the sealing between the fuel inlets and outlets and the fuel end cover and between the lubricating oil inlets and outlets and the lubricating oil manifold is ensured, effectively avoiding fuel and lubricating oil leakage during the operation of the oil cooler.

[0044] Figure 7 is the front view of the heat exchange core; Figure 8 is the top view of the heat exchange core; Figure 9 is the left view of the heat exchange core. As Figure 2 、 7 、8 and 9 shown, the main body of the heat exchange core is composed of an H-shaped heat sink 6 and harmonica tubes 7. There are multiple groups of harmonica tubes 7, and multiple groups of H-shaped heat sinks are evenly arranged between each column of harmonica tubes according to the fuel flow direction. The H-shaped heat sinks are connected to the outer wall of the harmonica tubes by brazing. Low-temperature fuel flows from the fuel inlet 9 into the right chamber of the front end plate 10-3 in the front end cover assembly 10, flows through multiple micro-channels inside the harmonica tubes 7 connected to this area into the rear end cover assembly 2, and returns to the internal flow path of the harmonica tubes on the left side of the heat exchange core through the rear partition 2-2. After flowing through the left chamber of the front end cover 10-3, it flows out from the fuel outlet 11. High-temperature lubricating oil flows from the lubricating oil inlet 15 into the right chamber of the lubricating oil baffle 14-1 in the lubricating oil manifold 14, and flows into the flow path surrounded by the outer wall of the H-shaped heat sink 6 and the harmonica tubes 7 through the flow path holes opened on the upper lubricating oil housing 1. After the lubricating oil fills a column of flow path cavities, from Figure 9The rectangular holes formed by the assembly of the middle heat pipe and the corrugated pipe flow into the next row of chambers, flow from right to left, fill the entire heat exchange core chamber, and then flow into the chamber to the left of the oil baffle 14-1 in the oil collecting pipe 14 and flow out from the oil outlet 13. In the heat exchange core, the fuel and oil flow channels are arranged in a cross-flow manner, effectively reducing the fluid flow resistance, thereby reducing heat loss and enhancing the heat exchange effect.

[0045] As Figure 10 shown, the corrugated pipe 7 is prepared by a hot extrusion method. The aluminum alloy plate is heated to a certain temperature and then placed in an extruder, and the required shape is formed through an extrusion die under high pressure. The corrugated pipe 7 is a plate with a plurality of through holes arranged at intervals along the thickness direction; the length of the plate is the length of the sealed cavity, and the through holes of the plate communicate with the front end cover assembly 10 and the rear end cover assembly 2. The cross-sectional shape of the through holes of the corrugated pipe 7 is rectangular, circular or semi-circular and their combinations; as Figure 10 shown, it is preferred that the through holes in the middle are rectangular and the through holes at both ends are semi-circular; all right-angled edges of the corrugated pipe 7 are rounded, and the radius of the rounded corner is 0.2 mm. The spacing between the through holes in the corrugated pipe is 0.3 - 0.4 mm, preferably 0.35 mm; the width from the through hole of the corrugated pipe to the outer edge is 0.3 - 0.5 mm, preferably 0.4 mm. In the transverse interval arrangement of multiple corrugated pipes, the transverse spacing between two adjacent corrugated pipes in the middle row is 8 - 12 mm, and in the longitudinal arrangement of multiple rows of corrugated pipes, the longitudinal spacing between two adjacent corrugated pipes is 35 - 45 mm.

[0046] As Figure 11 shown, the H-shaped heat pipe 6 is composed of two side wing plates and a middle waist plate. The thicknesses of the two side wing plates and the middle waist plate are 0.4 - 0.6 mm (preferably 0.5 mm) and 1.5 - 2.5 mm (preferably 2 mm) respectively; there are multiple groups of H-shaped heat pipes arranged in the heat exchange core and are arranged between the corrugated pipes by brazing. The cross-section of the waist plate of the H-shaped heat pipe 6 is strip-shaped or V-shaped; it is preferred that the cross-section of the waist plate of the H-shaped heat pipe 6 is V-shaped; especially preferably, the waist plate of the H-shaped heat pipe 6 is composed of two V-shaped cross-sections arranged at intervals; a V-shaped inner cavity with a spacing of 0.5 - 1.5 mm is formed between the two waist plates. An appropriate amount of acetone working fluid is injected into the cavity, and then the waist plates are completely sealed, and a reliability test is carried out in a constant temperature water bath to ensure good sealing. In the present utility model, the two side wing plates and the processed heat pipe waist plate are connected into a whole by brazing to form a complete H-shaped heat pipe structure; this structure can significantly increase the fluid contact area and maintain a uniform heat distribution, promote the smooth flow of the fluid in the inner cavity, generate a stronger turbulent effect and shear force, and improve the heat conduction efficiency. At the same time, the H-shaped heat pipe structure can dissipate heat more effectively, reduce the generation of hot spots and cold spots, and achieve a better temperature equalization effect.

[0047] The materials of the oil cooler of the present utility model are all preferably Al6061 aluminum alloy materials, and each component is prepared from this material.

[0048] The low-temperature fuel of the oil cooler of the utility model flows through the microchannel inside the harmonica tube, and flows in the direction of front-rear-front transverse flow; the high-temperature lubricating oil flows through the flow channel formed by the outer wall of the harmonica tube and the H-type heat spreader structure, and flows in the direction of up-down-up longitudinal flow; after the high-temperature lubricating oil flows into the heat exchange core structure, it contacts the H-type heat spreader structure and the outer wall surface of the harmonica tube; after the low-temperature fuel flows into the heat exchange core structure, it contacts the wall surfaces of multiple flow channels inside the harmonica tube; the fuel and the lubricating oil exchange heat through the outer wall surface of the harmonica tube.

[0049] The flow channel of the utility model adopts a cross-flow arrangement flow channel design, which can make the fuel and lubricating oil flow inside the oil cooler without interfering with each other, and more fully exchange heat. The low-temperature fuel of the oil cooler flows in through the fuel inlet 9 on the lower right side of the front of the shell, flows through the harmonica tube 7, and flows out from the fuel outlet 11 on the upper left side of the front of the shell; the high-temperature lubricating oil of the oil cooler flows in from the lubricating oil inlet 15 on the upper part of the shell, flows into the flow channel composed of the H-type heat spreader and the harmonica tube through the right chamber of the lubricating oil manifold 14, and flows out from the lubricating oil outlet on the left side of the lubricating oil manifold, so that the tube-side flow channel flows low-temperature fuel and the shell-side flow channel flows high-temperature lubricating oil, which improves the heat dissipation efficiency, reduces the flow resistance, and adapts to more stringent working conditions.

[0050] In particular, the utility model oil cooler adopts multiple groups of harmonica tubes and H-type heat spreader structure inside. This structure effectively increases the heat conduction area and improves the heat exchange efficiency of the oil cooler, so that it can effectively cool the lubricating oil and heat the fuel oil, achieving a good heat exchange effect. The harmonica tubes are arranged longitudinally, and the middle waist plate of the H-type heat spreader is also designed longitudinally. In particular, the opening edge of each H-type heat spreader of the utility model is welded to the harmonica tubes at both ends respectively. With the longitudinal arrangement of the harmonica tubes, the heat exchange core of the utility model forms a longitudinal and transverse flow channel mesh arrangement structure, which is almost similar to a solid structure, so that the heat exchange core has an extremely high pressure bearing capacity; so that the utility model achieves both efficient heat exchange and extremely high pressure bearing capacity. The utility model oil cooler has the advantages of simple manufacturing and easy maintenance, so as to meet the wide application of oil coolers in aviation, ships, automobiles, engineering machinery and other fields.

[0051] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An oil cooler with an H-type heat transfer unit structure, characterized in that It includes a heat exchange core, a lubricating oil inlet and outlet device and a fuel inlet and outlet device; the heat exchange core is composed of an H-shaped heat spreader and a harmonica tube arranged in a closed cavity; there are multiple harmonica tubes; each harmonica tube is evenly spaced and provided with multiple through holes along the thickness direction; each harmonica tube is arranged vertically; multiple harmonica tubes are arranged horizontally and spaced to form a vertical column; multiple columns of harmonica tubes are arranged vertically; there are multiple H-shaped heat spreaders, each of which is composed of two side wing plates and a middle waist plate connected longitudinally, and the opening edges of each H-shaped heat spreader are respectively welded to the harmonica tubes at both ends, and multiple H-shaped heat spreaders are spaced or continuously arranged between two rows of harmonica tubes; the lubricating oil inlet and outlet device includes a lubricating oil outlet, a lubricating oil collector Pipe, lubricating oil inlet; two through holes are provided in the middle of the lubricating oil collecting pipe, and the two through hole ends of the lubricating oil collecting pipe are respectively connected to the lubricating oil inlet and the lubricating oil outlet; the lower ends of the two through holes are respectively connected to the lubricating oil flow channel formed by the H-type heat spreader and the outer wall of the harmonica tube; the fuel inlet and outlet device includes a front cover assembly and a rear cover assembly; the front cover assembly and the rear cover assembly are respectively located on both sides of the heat exchange core; the front cover assembly and the rear cover assembly are connected with multiple openings of the harmonica tube through the closed cavity of the heat exchange core; the front cover assembly is divided into two non-connected cavities; the two cavities are respectively sealed and connected with the fuel inlet and the fuel outlet; the rear cover assembly is divided into two mutually connected cavities.

2. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The front end cover assembly is mainly composed of a front end plate, a front partition, a front end cover and a fuel side end plate; the front end cover is an arc-shaped structure or a square structure with multiple partition plates inside. The front end cover and the front end plate and the fuel side end plate form an open cavity structure. The partition plates provided on the front end cover divide the cavity evenly, and multiple through holes are evenly provided on the partition plates. A front partition plate is provided in the middle of the cavity to divide the cavity into two parts that are not connected to each other.

3. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 2, characterized in that: The through hole is a circular hole or a square hole.

4. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The rear end cover assembly is mainly composed of a rear end plate, a rear partition and a rear end cover; the rear end cover is an arc-shaped structure or a square structure with multiple spacer plates inside, and the rear end cover and the rear end plates at both ends form an open cavity structure, the spacer plates arranged inside the rear end cover divide the cavity evenly, and the spacer plates are evenly provided with multiple through holes to connect the cavities separated by different spacer plates; multiple rear partition plates are arranged in the middle of the cavity, and each rear partition plate is processed with an opening.

5. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The closed cavity of the heat exchange core is composed of the front fuel main plate and the rear fuel main plate on both sides, the front oil inlet side support plate and the rear oil outlet side support plate, and the upper and lower oil shells and the lower oil shells that are sealed and connected.

6. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 5, characterized in that: The front fuel main plate and the rear fuel main plate are obtained by machining or die stamping; the main bodies of the front fuel main plate and the rear fuel main plate are arranged with openings for installing and fixing multiple rows of harmonica tube cross-section holes, and rectangular holes are arranged on both sides for installing and fixing with the lubricating oil inlet side support plate and the lubricating oil outlet side support plate; the lubricating oil upper shell and the lubricating oil lower shell are both bent structures, and one end of the bent lubricating oil upper shell and the lubricating oil lower shell covers the upper and lower ends of the heat exchange core; the other bent ends respectively cover the upper and lower sides of the front end of the heat exchange core; the lubricating oil upper shell covers a plurality of openings on one side of the upper end of the heat exchange core.

7. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The harmonica tube is a plate with a plurality of through holes spaced apart in the thickness direction; the cross-sectional shape of the through holes of the harmonica tube is rectangular, circular or semicircular and a combination thereof; the spacing between the through holes in the harmonica tube is 0.3-0.4 mm, and the width from the through holes to the outer edge of the harmonica tube is 0.3-0.5 mm.

8. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 7, characterized in that: The middle through hole of the harmonica pipe is rectangular, and the through holes at both ends are semicircular.

9. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The lateral spacing between two adjacent harmonica pipes in the lateral spacing arrangement of the plurality of harmonica pipes is 8-12 mm; the longitudinal spacing between two adjacent harmonica pipes in the longitudinal arrangement of the plurality of harmonica pipes is 35-45 mm.

10. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 1, characterized in that: The thicknesses of the two side wing plates and the middle waist plate of the H-shaped heat spreader are 0.4-0.6 mm and 1.5-2.5 mm respectively; the cross section of the waist plate of the H-shaped heat spreader is a long strip or V-shaped.

11. The oil cooler with H-type vapor chamber heat transfer unit structure according to claim 10, characterized in that: The waist plate of the H-shaped heat spreader is composed of two V-shaped cross-sections arranged at intervals; a V-shaped inner cavity with an interval of 0.5-1.5 mm is formed between the two waist plates, and acetone working medium is injected into the cavity.

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