Reducing plate-fin oil cooler

Abstract

The invention discloses a variable-diameter plate-fin oil cooler. The variable-diameter plate-fin oil cooler comprises an oil cooler core and a connecting plate, a plurality of first cavities and a plurality of second cavities are formed in the oil cooler core, the first cavities and the second cavities are distributed alternately and arranged in the thickness direction of the oil cooler core, and the inlet end and the outlet end of each first cavity are connected with a first variable-diameter channel to form a cooling flow path. The inlet end and the outlet end of each second cavity are respectively connected with a second reducing channel to form an engine oil flow path; the connecting plate is used for mounting an oil cooler core; and the diameters of the first variable-diameter channel and the second variable-diameter channel are reduced from the opposite side, provided with the connecting plate, of the oil cooler core to the direction of the connecting plate. A first variable-diameter channel and a second variable-diameter channel are arranged to control the flow entering each layer so as to control the flow speed; the purpose of reducing local pressure and heat is achieved through uniform flow velocity of each layer.

Description

Technical Field

[0001] The invention relates to the technical field of oil coolers, and in particular to a variable diameter plate-fin type oil cooler. Background Art

[0002] Plate-fin oil coolers were first used for heat dissipation in aircraft engines. They are compact, lightweight, and have good heat transfer performance. They have also been widely used in petrochemical, aviation, and vehicle industries. In actual operation, the heat transfer performance of plate-fin oil coolers is always lower than the design value. The main reasons are the uneven velocity distribution in the heat exchange gas, the uneven temperature distribution, and the longitudinal heat conduction. Among the above three factors, the uneven velocity distribution in the oil cooler aggravates the uneven temperature field distribution and longitudinal heat conduction, and is therefore the root cause of the overall performance decline of the oil cooler. Related experiments show that the performance decline of the oil cooler caused by the uneven velocity distribution ranges from 5% to 25%.

[0003] The existing method for achieving uniform flow velocity in each layer of the oil cooler is usually to place fins with high resistance in the high velocity area and fins with low resistance in the low velocity area to reduce the difference in flow velocity between layers. However, the introduction of fins with high resistance in the high velocity area will significantly increase the pressure drop in the area, which may cause local flow blockage and affect the uniformity of fluid distribution. Although fins with high resistance can slow down the flow velocity, they may reduce the heat exchange efficiency in the area, affecting the overall heat exchange performance of the oil cooler. Summary of the invention

[0004] The main purpose of the present invention is to provide a variable diameter plate-fin oil cooler, aiming to solve the problems of uneven flow velocity in each layer of the flow channel of the oil cooler, reduced heat exchange efficiency and affected heat exchange performance of the overall oil cooler.

[0005] To achieve the above-mentioned purpose, the variable diameter plate-fin type oil cooler proposed in the present invention comprises an oil cooler core and a connecting plate;

[0006] The oil cooler core is formed with a plurality of first cavities and a plurality of second cavities, the first cavities and the second cavities are alternately distributed and arranged along the thickness direction of the oil cooler core, the inlet end and the outlet end of each of the first cavities are respectively connected with a first diameter-reducing channel to form a cooling flow path, the cooling medium flows along the direction of the cooling flow path, the inlet end and the outlet end of each of the second cavities are respectively connected with a second diameter-reducing channel to form an oil flow path, the high-temperature oil flows along the direction of the oil flow path; the inlet and outlet of the cooling flow path and the inlet and outlet of the oil flow path are arranged on the same side, the connecting plate is arranged on the surface of the oil cooler core, and corresponds to the inlet and outlet of the cooling flow path and the inlet and outlet of the oil flow path, and is used for installing the oil cooler core;

[0007] The diameters of the first and second variable-diameter channels are reduced from the opposite side of the oil cooler core where a connecting plate is provided toward the connecting plate, and the connecting plate is provided with openings connected to the inlet and outlet of the cooling flow path and the inlet and outlet of the oil flow path.

[0008] Preferably, the oil cooler core includes first fins and second fins, and the first fins and the second fins are alternately stacked to form the first cavity and the second cavity.

[0009] Preferably, the edge of the first fin is provided with a first flange, the edge of the second fin is provided with a second flange, the first fin is connected to the surface of the second fin facing away from the second flange via the first flange, and the surface of the first fin facing away from the first flange is arranged toward the connecting plate.

[0010] Preferably, the surface of the first fin provided with the first convex edge is provided with two first abutting members, the surface of the first fin away from the first convex edge is provided with two second abutting members, the first abutting member is provided with a first through hole, and the second abutting member is provided with a second through hole;

[0011] And / or, the first abutting member and the second abutting member abut against two adjacent second fins respectively.

[0012] Preferably, the apertures of the first through holes and the second through holes of two adjacent first fins are the same or different.

[0013] Preferably, the surface of the second fin provided with the second convex edge is provided with two third abutting members, the surface of the second fin away from the second convex edge is provided with two fourth abutting members, the third abutting member is provided with a third through hole, and the fourth abutting member is provided with a fourth through hole;

[0014] And / or, the third abutting member and the fourth abutting member abut against two adjacent first fins respectively.

[0015] Preferably, the diameters of the third through holes and the fourth through holes of two adjacent second fins are the same or different.

[0016] Preferably, the oil cooler core also includes a first sealing plate and a second sealing plate, the first sealing plate is arranged between the connecting plate and the first fin of the bottom layer, and encloses the first cavity, and the second sealing plate is connected to the first flange of the first fin of the top layer, and encloses the second cavity.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting two first reducing channels and two second reducing channels and connecting them to each first cavity, the flow rate of the coolant in the first cavity is changed, while the two second reducing channels are connected to each second cavity to change the flow rate of the engine oil in the second cavity, so as to control the flow entering each layer and then control the flow rate; the flow rate of each layer is uniform so as to achieve the purpose of reducing local pressure and heat, thereby improving the performance and service life of the oil cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a variable diameter plate-fin type oil cooler of the present invention;

[0021] Figure 2 is a side view of the variable diameter plate-fin type oil cooler of the present invention;

[0022] Figure 3 yes Figure 2 Sectional view at A-A';

[0023] Figure 4 It is an exploded view of the variable diameter plate-fin type oil cooler of the present invention;

[0024] Figure 5 Schematic diagram of the cooling flow path of an embodiment of a variable diameter plate-fin type oil cooler of the present invention;

[0025] Figure 6 Schematic diagram of the oil flow path of an embodiment of a variable diameter plate-fin oil cooler of the present invention;

[0026] Figure 7 is an exploded view of another embodiment of the variable diameter plate-fin type oil cooler of the present invention;

[0027] Figure 8 It is a schematic diagram of simulated flow rate of the variable diameter plate-fin type oil cooler of the present invention.

[0028] In the accompanying drawings, 1-oil cooler core, 11-first fin, 111-first flange, 112-first abutment, 113-second abutment, 114-first through hole, 115-second through hole, 12-second fin, 121-second flange, 122-third abutment, 123-fourth abutment, 124-third through hole, 125-fourth through hole, 13-first cavity, 14-second cavity, 15-first sealing plate, 151-third flange, 152-fifth abutment, 153-fifth through hole, 154-sixth through hole, 16-second sealing plate, 161-sealing member, 162-fourth flange, 2-first variable diameter channel, 3-second variable diameter channel, 4-cooling flow path, 5-oil flow path, 6-connecting plate, 61-opening, 62-connecting hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] To solve the above problems, Figures 1 to 7 As shown, the present invention provides a variable diameter plate-fin type oil cooler, comprising an oil cooler core 1 and a connecting plate 6; Figure 3As shown, the oil cooler core 1 is formed with a plurality of first cavities 13 and a plurality of second cavities 14, the first cavities 13 and the second cavities 14 are alternately distributed and arranged along the thickness direction of the oil cooler core 1, the inlet end and the outlet end of each of the first cavities 13 are respectively connected with a first diameter-reducing channel 2 to form a cooling flow path 4, and the cooling medium flows along the direction of the cooling flow path 4, and the inlet end and the outlet end of each of the second cavities 14 are respectively connected with a second diameter-reducing channel 3 to form an oil flow path 5, and the high-temperature oil flows along the direction of the oil flow path 5; the inlet and outlet of the cooling flow path 4 and the oil flow path 5 are connected. The inlet and outlet are arranged on the same side, and the connecting plate 6 is arranged on the surface of the oil cooler core 1, and corresponds to the inlet and outlet of the cooling flow path 4 and the inlet and outlet of the engine oil flow path 5, and is used to install the oil cooler core 1; wherein the diameters of the first reducing channel 2 and the second reducing channel 3 are reduced from the opposite side of the oil cooler core 1 where the connecting plate 6 is arranged toward the connecting plate 6, and the connecting plate 6 is provided with an opening 61 connected with the inlet and outlet of the cooling flow path 4 and the inlet and outlet of the engine oil flow path 5; further, the connecting plate 6 is also provided with a connecting hole 62, and the oil cooler is installed on the application component through the connecting hole 62. Further, as Figure 4 and Figure 7 As shown, the two first variable-diameter channels can be distributed diagonally or on the same side, and the two second variable-diameter channels can be distributed diagonally or on the same side, and the positions of the corresponding first to fifth abutting members and the blocking member are set according to the distribution of the first variable-diameter channels and the second variable-diameter channels; Figures 3 to 6 Two first variable-diameter channels distributed diagonally and two second variable-diameter channels distributed diagonally are taken as examples.

[0034] In an optional embodiment, if Figure 1 As shown, the oil cooler core 1 includes a first fin 11 and a second fin 12, and the first fin 11 and the second fin 12 are alternately stacked and arranged to form the first cavity 13 and the second cavity 14. Specifically, in this embodiment, the second sealing plate 16 can be connected to the first fin 11 or the second fin 12, and the number of the first fin 11 or the second fin 12 can be designed according to different usage scenarios or environments.

[0035] In an optional embodiment, a first flange 111 is provided at an edge of the first fin 11, a second flange 121 is provided at an edge of the second fin 12, the first fin 11 is connected to a surface of the second fin 12 facing away from the second flange 121 via the first flange 111, and a surface of the first fin 11 facing away from the first flange 111 is arranged toward the connecting plate 6.

[0036] In an optional embodiment, if Figure 4 and Figure 5As shown, the first fin 11 is provided with two first abutting members 112 on the surface of the first flange 111, and two second abutting members 113 are provided on the surface of the first fin 11 facing away from the first flange 111. The first abutting member 112 is provided with a first through hole 114, and the second abutting member 113 is provided with a second through hole 115; further, the first abutting member 112 and the second abutting member 113 are respectively abutted with two adjacent second fins 12; specifically, the first flange 111, the first fin 11, the first abutting member 112 and the second abutting member 113 are an integrally formed structure with high connection strength, and further, the apertures of the first through hole 114 and the second through hole 115 of the two adjacent first fins 11 are the same or different.

[0037] In an optional embodiment, if Figure 6 As shown, the surface of the second fin 12 provided with the second flange 121 is provided with two third abutting members 122, and the surface of the second fin 12 away from the second flange 121 is provided with two fourth abutting members 123, the third abutting member 122 is provided with a third through hole 124, and the fourth abutting member 123 is provided with a fourth through hole 125; further, the third abutting member 122 and the fourth abutting member 123 are respectively abutted with two adjacent first fins 11; specifically, the second flange 121, The third abutment 122, the fourth abutment 123 and the second fin 12 are an integrally formed structure, which improves the connection strength among the four. The apertures of the third through hole 124 and the fourth through hole 125 of two adjacent second fins 12 are the same or different. After a plurality of first fins 11 and second fins 12 are alternately stacked, the abutments at various positions abut against each other, and the first variable-diameter channel 2 and the second variable-diameter channel 3 are formed through the corresponding through holes, so as to achieve the purpose of controlling the uniform flow rate of the fluid in the first cavity 13 and the second cavity 14.

[0038] In an optional embodiment, if Figure 4As shown, the oil cooler core 1 further includes a first sealing plate 15 and a second sealing plate 16. The first sealing plate 15 is disposed between the connecting plate 6 and the first fin 11 of the bottom layer, and encloses and forms the first cavity 13. The second sealing plate 16 is connected to the first flange 111 of the first fin 11 of the top layer, and encloses and forms the second cavity 14. Specifically, the surface of the first sealing plate 15 facing away from the connecting plate 6 is provided with a third flange 151, and the third flange 151 is connected to the surface of the first fin 11 facing away from the first flange 111. The first sealing plate 15 is provided with two fifth abutting members 152 corresponding to the second abutting member 113, and is provided with a fifth through hole 153 and two sixth through holes 154. The coolant enters the first reducing channel 2 at the inlet end through the sixth through hole 154, and flows into each first cavity 13, and then the coolant passes through The first reducing channel 2 at the outlet end converges into the first cavity 13 formed between the first sealing plate 15 and the first fin 11, and flows out from the sixth through hole 154 which is separately arranged. The second sealing plate 16 is provided with a sealing member 161 corresponding to the first abutment 112, and a fourth flange 162 is provided on the surface away from the sealing member 161. The sealing member 161 seals the corresponding first through hole 114, and the first abutment 112 at this location is brazed with the fourth flange 162 to realize the sealing layer of the oil cooler core 1.

[0039] The oil cooler core 1 is assembled in such a way that the bottom first fin 11 is placed on a plane, and its first flange 111 is arranged in a direction away from the plane, the second fin 12 is placed on the surface of the first fin 11 provided with the first flange 111 in the same direction, and is brazed with the first flange 111, at which time the first abutment 112 and the fourth abutment 123 abut against each other, the second abutment 113 of the bottom first fin 11 abuts against the fifth abutment 152 of the first sealing plate 15, and the third abutment 112 of the second fin 12 abuts against each other. 122 abuts against the second abutment member 113 of the next first fin 11. In this embodiment, a total of six first fins 11 and five second fins 12 are provided. Each first fin 11 and second fin 12 are alternately arranged and connected according to the above arrangement. In addition, it is necessary to select the corresponding first fin 11 and second fin 12 combination according to the rule that the diameters of the first reducing channel 2 and the second reducing channel 3 are reduced from the opposite side of the oil cooler core 1 provided with the connecting plate 6 toward the connecting plate 6; the cooling flow path is as follows: Figure 5 As shown, the oil flow path is as follows Figure 6 As shown, this solution controls the flow rate of fluid such as engine oil or cooling water entering each layer through the first variable diameter channel 2 and the second variable diameter channel 3, thereby controlling the flow rate of the fluid in each layer to achieve the purpose of uniform flow rate of the fluid in each layer.

[0040] The change of the through-hole aperture of various abutments can control the flow rate flowing into the first cavity 13 and the second cavity 14 and thus control the flow rate. According to the relationship between the flow rate (Q) and the flow rate (v): Q = vA, A is the cross-sectional area through which the fluid passes, which is related to the size of the apertures of the first through hole 114, the second through hole 115, the third through hole 124 and the second through hole 115. The smaller the aperture, the less the flow rate flowing into the first cavity 13 or the second cavity 14, and the slower the flow rate. According to the above principle, a first fin 11 and a second fin 12 are used as a layer of flow channel, wherein the sixth layer of flow channel is composed of a first fin 11 and a second sealing plate 16, and the apertures of various through holes are divided into three groups of 10mm, 12mm and 14mm, as shown in Table 1:

[0041] Table 1 The diameter of the through holes corresponding to the flow channels in each layer

[0042]

[0043] Furthermore, the first abutment 112, the second abutment 113, the third abutment 122, the fourth abutment 123 and the fifth abutment 152 have the same appearance and the same outer diameter, and will not change with the aperture of the corresponding through hole, so that when the aperture of the corresponding through hole changes, the two corresponding abutments can fit tightly together. In addition, sealing gaskets can be arranged on the surfaces where the abutments abut each other to improve the sealing of the oil cooler core 1.

[0044] like Figure 3 and Figure 8 As shown, the flow rate of the first layer of channels is the fastest and becomes slower as the layers go up, so the first fin 11 and the second fin 12 with a through hole diameter of 10mm are used as the first layer. The flow rate of the second layer is similar to that of the first layer, so the first fin 11 and the second fin 12 with a through hole diameter of 10mm are used as the second layer, and so on. The sixth layer is the first fin 11 and the second fin 12 with a through hole diameter of 14mm, so as to control the difference in flow rate of each channel to reduce and achieve uniform flow rate of each layer. According to the results of the simulation, the flow rate of the fluid in the first cavity 13 and the second cavity 14 of the first layer where the coolant or the engine oil enters respectively is the fastest, and the flow rate of the fluid in the first cavity 13 or the second cavity 14 becomes slower as the layers go up.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A variable diameter plate-fin oil cooler, characterized in that: Including oil cooler core and connecting plate; The oil cooler core is formed with a plurality of first cavities and a plurality of second cavities, the first cavities and the second cavities are alternately distributed and arranged along the thickness direction of the oil cooler core, the inlet end and the outlet end of each first cavity are respectively connected with a first diameter-reducing channel to form a cooling flow path, the cooling medium flows along the cooling flow path, the inlet end and the outlet end of each second cavity are respectively connected with a second diameter-reducing channel, and the high-temperature engine oil flows along the engine oil flow path; the inlet and outlet of the cooling flow path and the inlet and outlet of the engine oil flow path are arranged on the same side, the connecting plate is arranged on the surface of the oil cooler core, and corresponds to the inlet and outlet of the cooling flow path and the inlet and outlet of the engine oil flow path, and is used for installing the oil cooler core; The diameters of the first and second variable-diameter channels are reduced from the opposite side of the oil cooler core where a connecting plate is provided toward the connecting plate, and the connecting plate is provided with openings connected to the inlet and outlet of the cooling flow path and the inlet and outlet of the oil flow path.

2. The variable diameter plate-fin oil cooler according to claim 1, characterized in that: The oil cooler core includes a first fin and a second fin, wherein the first fin and the second fin are alternately stacked and arranged to form the first cavity and the second cavity.

3. The variable diameter plate-fin type oil cooler according to claim 2, characterized in that: The first fin has a first flange at its edge, the second fin has a second flange at its edge, the first fin is connected to the surface of the second fin facing away from the second flange via the first flange, and the surface of the first fin facing away from the first flange is arranged toward the connecting plate.

4. The variable diameter plate-fin type oil cooler according to claim 3, characterized in that: The surface of the first fin provided with the first convex edge is provided with two first abutting members, the surface of the first fin away from the first convex edge is provided with two second abutting members, the first abutting member is provided with a first through hole, and the second abutting member is provided with a second through hole; And / or, the first abutting member and the second abutting member abut against two adjacent second fins respectively.

5. The variable diameter plate-fin type oil cooler according to claim 4, characterized in that: The apertures of the first through holes and the second through holes of two adjacent first fins are the same or different.

6. The variable diameter plate-fin type oil cooler according to claim 3, characterized in that: The surface of the second fin provided with the second convex edge is provided with two third abutting members, the surface of the second fin away from the second convex edge is provided with two fourth abutting members, the third abutting member is provided with a third through hole, and the fourth abutting member is provided with a fourth through hole; And / or, the third abutting member and the fourth abutting member abut against two adjacent first fins respectively.

7. The variable diameter plate-fin type oil cooler according to claim 6, characterized in that: The apertures of the third through holes and the fourth through holes of two adjacent second fins are the same or different.

8. The variable diameter plate-fin oil cooler according to claim 2, characterized in that: The oil cooler core also includes a first sealing plate and a second sealing plate, wherein the first sealing plate is disposed between the connecting plate and the first fin of the bottom layer and encloses the first cavity, and the second sealing plate is connected to the first flange of the first fin of the top layer and encloses the second cavity.

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