Novel ducted arc-shaped radiator

Abstract

The utility model discloses a novel ducted arc-shaped radiator which is mainly composed of a mounting plate, a lubricating oil pipe nozzle, a bypass valve, a lubricating oil inlet and outlet end cover, a core body assembly, an oil return end cover and the like. The utility model relates to a ducted arc-shaped radiator matched with the development of an engine lubricating system. The upper side of the mounting plate is of a conical surface structure used for being attached to the engine duct, the lower side of the mounting plate is of an arc surface structure in transition and is connected with the arc-shaped radiator in a welded mode, the engine duct is well attached, the problem that a conical core assembly is difficult to machine is solved, and the radiating efficiency is improved. The mounting plate adopts a weight reduction design, a groove is formed in the middle, and reinforcing ribs are added for supporting in order to guarantee the strength. A bypass valve is designed on the lubricating oil side, when the pressure difference between the lubricating oil inlet and the lubricating oil outlet is increased, the lubricating oil opens the lubricating oil bypass valve, and the lubricating oil directly flows to the oil outlet from the oil inlet. By using the lubricating oil cooling device, the lubricating oil cooling process can be controlled, and the lubricating oil cooling device is safe, stable, reliable and good in economical efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel duct arc-shaped radiator belongs to air slide oil radiator design field. BACKGROUND

[0002] The lubrication system has important effects on the lubrication, heat dissipation, cleaning, corrosion prevention and the like of the aero-engine, and the safety of the lubrication system affects the safety of the whole engine. With the improvement of the engine performance, the temperature of the transmission chamber is also higher and higher, and the requirement for the lubrication system is also continuously improved. The most common heat dissipation mode of the lubrication system is to add a pipeline connection in the engine duct, air is introduced through the air inlet of the engine, and heat exchange is carried out between the air and the slide oil, but the pipeline arrangement is complex, the space occupancy rate is high, and the material consumption is large. Therefore, in the past two years, researchers have proposed that the radiator is installed in the engine duct, which not only saves the pipeline arrangement, but also utilizes the idle space and reduces the use of materials. However, the duct structure has a certain slope, and therefore, the researchers initially modified the overall structure of the radiator to be conical to adapt to the installation in the duct, but the process requirement is high, which increases the difficulty for the process personnel. SUMMARY

[0003] In view of the problems of high cost, complex pipeline arrangement and high process requirement of the existing arc-shaped radiator, the utility model aims to provide a novel duct arc-shaped radiator to solve the above problems.

[0004] In order to achieve the above target, the utility model adopts the following technical scheme:

[0005] A novel duct arc-shaped radiator comprises:

[0006] The surface of the mounting plate assembled and connected with the engine duct is a conical surface, the surface away from the engine duct is a circular arc surface, and the circular arc surface is coaxial with the conical surface;

[0007] The core body assembly is in a circular arc shape and is connected to the circular arc surface of the mounting plate through the circular arc surface thereof, and the core body assembly comprises an air flow channel and a slide oil flow channel, wherein the air flow channel is parallel to the axis of the conical surface of the mounting plate, the slide oil flow channel is in a circular arc shape, and the slide oil flow channel is an even number of flow processes, such as two flow processes or more than two flow processes;

[0008] The slide oil inlet and outlet end cover is arranged at the first end of the corresponding circular arc length direction of the core body assembly, and the slide oil inlet and outlet end cover comprises at least one oil inlet cavity, at least one oil outlet cavity and at least one bypass cavity, the oil inlet cavity and the oil outlet cavity are communicated with the slide oil flow channel in the core body assembly, and the bypass cavity is communicated with the oil inlet cavity and the oil outlet cavity, respectively;

[0009] An oil return end cover is arranged at the second end of the circular arc of the core assembly, and the oil return end cover is in communication with the oil flow channels of different processes.

[0010] Two oil pipe nozzles are arranged on the oil inlet and outlet end cover, one of which is in communication with the oil inlet cavity as an oil inlet joint, and the other is in communication with the oil outlet cavity as an oil outlet joint. The oil pipe nozzles extend towards the engine duct through the mounting plate.

[0011] A bypass valve is arranged in the bypass cavity of the oil inlet and outlet end cover. When the pressure difference between the oil inlet cavity and the oil outlet cavity is greater than a set value, the bypass valve opens, and the oil in the oil inlet cavity flows directly into the bypass cavity and then into the oil outlet cavity.

[0012] As an option, a plurality of lightening grooves are arranged on the conical surface of the mounting plate, and the adjacent lightening grooves are separated by reinforcing ribs.

[0013] As an option, a through hole is arranged on the mounting plate for connecting with the engine duct, and the through hole is distributed along the outer contour line of the mounting plate.

[0014] As an option, the end face of the oil pipe nozzle is connected by a clamp after being connected with the main engine pipeline.

[0015] As an option:

[0016] The bypass cavity includes a bypass inlet in communication with the oil inlet cavity and a bypass outlet in communication with the oil outlet cavity.

[0017] The bypass valve includes a valve seat, a valve core and a spring. The valve seat is mounted on the oil inlet and outlet end cover, the valve core is slidably connected to the valve seat by the spring and is located between the bypass inlet and the bypass outlet of the bypass cavity.

[0018] As an option, the core assembly includes alternately stacked mouthpieces and fins. The internal passage of each layer of mouthpiece forms an oil flow channel, and the internal passage formed by the adjacent two layers of mouthpieces and the fins between the two layers of mouthpieces forms an air flow channel.

[0019] As an option, the circular arc surface of the core assembly is welded with the circular arc surface of the mounting plate.

[0020] Further, the circular arc surface of the mounting plate is provided with an I-shaped groove. The mounting plate and the core assembly are welded at the plurality of I-shaped grooves to ensure the overall strength of the product.

[0021] Compared with the prior art, the mounting plate with the upper side being a conical surface structure and the lower side being a circular arc surface structure is used for abutting the engine duct, is fixed by using bolts, is simple to disassemble and assemble, the arc core body assembly is connected by welding at the lower side of the mounting plate, the mounting plate is slotted in the middle for weight reduction design, and a reinforcing rib is additionally arranged in the middle for supporting to ensure the strength.

[0022] The working principle of the utility model is as follows: high-temperature lubricating oil from the engine enters the duct arc radiator, and low-temperature air is heat-conducted by the fin and the harmonica pipe inside the core body assembly, exchanges heat with the low-temperature air flowing through the fin from the outer duct, and achieves the purpose of cooling the lubricating oil, and the lubricating oil side is designed with a bypass valve.

[0023] In the process of design, development and test, the three-in-one design concept is implemented on the basis of satisfying high quality and reducing various costs as much as possible, in the process of implementing value engineering, the processing technology of the part is improved and the cost is reduced under the premise of satisfying the technical indexes. In addition, when the pressure difference between the lubricating oil inlet and outlet increases, the lubricating oil opens the lubricating oil bypass valve, and the lubricating oil flows directly from the lubricating oil (inlet) nozzle to the lubricating oil (outlet) nozzle through the bypass cavity, so that the lubricating oil cooling process is controlled, safe, stable, reliable, economical and stable.

[0024] The novel duct arc radiator has the advantages of compact structure, good heat transfer effect, strong pressure bearing capacity and good processability, solves the problem of high lubricating oil temperature, has high adaptability, reduces the processing difficulty, and can be used for lubricating systems of large, medium and small power aeroengines. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the utility model;

[0026] Figure 2 It is a front view of Figure 1 ;

[0027] Figure 3 It is a top view of Figure 1 ;

[0028] Figure 4 It is a right view of Figure 1 ;

[0029] Figure 5 It is a left view of Figure 1 ;

[0030] Figure 6 It is a sectional view of the mounting plate;

[0031] Figure 7 This is a schematic diagram of an oil nozzle;

[0032] Figure 8 This is a schematic diagram of a bypass valve;

[0033] Figure 9 Schematic diagram of the lubricating oil inlet and outlet end caps;

[0034] Figure 10 This is a schematic diagram of the core component structure;

[0035] Figure 11 for Figure 1 A cross-sectional diagram;

[0036] Figure 12 This is a schematic diagram of the oil return end cap;

[0037] In the diagram: 1. Mounting plate; 2. Oil nozzle; 3. Bypass valve; 4. Oil inlet / outlet end caps; 5. Core assembly; 6. Oil return end cap; 7. Upper side plate; 8. Lower side plate; 9. Fins; 10. Harmonica tube; 11. Grid plate; 12. Plug; 13. Sealing ring. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0039] like Figure 1 As shown, this utility model presents a novel ducted arc-shaped radiator, comprising a mounting plate 1, an oil nozzle 2, a bypass valve 3, oil inlet and outlet end caps 4, a core assembly 5, and an oil return end cap 6.

[0040] like Figures 2-6 As shown, the upper side of mounting plate 1 has a tapered surface structure to fit the engine duct and is fixed with bolts, making assembly and disassembly simple. The lower side of mounting plate 1 transitions to an arc-shaped surface structure, using welded connections to the arc-shaped core assembly 5. To achieve weight reduction, a groove is cut in the middle of mounting plate 1, and reinforcing ribs are added in the middle for support to ensure strength. Figure 11 As shown, the lower side of the mounting plate 1 is connected to the core assembly 5 by welding, and the welding position is located at the I-shaped through hole on the arc surface of the mounting plate 1.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, the lubricating oil nozzle 2 is the lubricating oil inlet and outlet nozzle. It is connected to the main unit pipeline by end face assembly and then by clamp. The lubricating oil passes through the lubricating oil inlet nozzle, through the harmonica tube 10, through the core assembly 5 to the return oil end cap 6, and returns to the lubricating oil outlet nozzle from the other end of the harmonica tube 10. The diameter of the lubricating oil nozzle 2 is φ26mm.

[0042] like Figure 8 As shown, bypass valve 3 is the control device, and there are 12 plugs ( Figure 8 The left side of the valve (middle section) features a threaded assembly structure. By controlling the spring compression, it ensures the valve opens to regulate the lubricating oil connection. Together with the valve assembly (valve seat, valve core), spring, and sealing ring 13, it forms the bypass valve 3. If the pressure difference between the lubricating oil inlet and outlet increases, the lubricating oil opens the bypass valve 3, flowing directly from the lubricating oil inlet nozzle to the lubricating oil outlet nozzle, bypassing the harmonica tube 10. The sealing ring 13 in the bypass valve 3 is made of fluoropolymer rubber with good high and low temperature resistance.

[0043] like Figure 9 The lubricating oil inlet and outlet end cap 4 is a transition part between the heat exchange core assembly 5 and the pipeline in the radiator. It mainly plays the role of collecting working medium and rectifying flow. It is also the pressure-bearing structure inside the product cavity. The lubricating oil inlet and outlet end cap 4 is processed by welding. Materials with good weldability are preferred, and reasonable welding processes are selected to ensure the quality of welding materials.

[0044] like Figure 10 The core assembly 5 consists of an upper side plate 7, a lower side plate 8, a harmonica tube 10, a grid plate 11 (which is welded to the harmonica tube 10 to isolate it from the air and collect lubricating oil), and fins 9 (with brazing filler metal), all integrally brazed. Vacuum brazing is preferred, which further improves the brazing quality and raises the brazing requirements, avoiding the need for re-welding after brazing aluminum alloy. This ensures the overall brazing of the core assembly 5 while controlling the product weight. The internal channel of the harmonica tube 10 is formed from aluminum profiles using a mold, and then pressed into the required shape using special tooling. The air-side fins 9 are also pressed into the required shape. After the core assembly 5 is assembled, it is clamped using a special fixture and then brazed in a vacuum brazing furnace. At high temperature, the air-side fins 9 with brazing filler metal are connected to the harmonica tube 10. The welding quality is checked after brazing. In core assembly 5, the number of flow paths on the oil side is even, and the number of flow paths on the air side is single. The flow path arrangements are either 1-2 or 1-4 (1 represents a single flow path, 2 and 4 represent double and four flow paths respectively). As the number of flow paths increases, the flow resistance loss at the bends increases significantly. Calculations show that when there are four flow paths on the oil side, the flow resistance at the bends accounts for approximately 30% to 35% of the product's flow resistance. Separating each flow path requires adding a seal, thus increasing the product weight. Therefore, a structure with two flow paths on the oil side and a single flow path on the air side is preferred. Core assembly 5 consists of an upper side plate 7, a lower side plate 8, a harmonica tube 10, a grid plate 11, and fins 9 (with brazing filler metal) welded together via vacuum brazing. The structure of the harmonica tube 10 is as follows... Figure 11Cross-sectional view shown.

[0045] As Figure 12 The oil return end cover 6 is the oil passage, and is formed by argon arc welding, and mainly functions as collecting the oil to make the oil return to the oil outlet.

[0046] As Figure 1 And Figure 11 The main process of the novel duct arc-shaped radiator is that the radiator assembly is formed by argon arc welding of the core assembly 5, the oil inlet and outlet end cover 4, the oil return end cover 6 and the oil nozzle 2, and then the surface treatment is carried out, the nanometer passivation is carried out on the outer surface, the air side fin 9 and the mounting surface, the oil inlet and outlet are connected with the pipeline on the machine through the clamp, the mounting surface of the upper side plate 7 is fixed through the bolt, and the main process methods of the product mainly relate to mechanical processing, sheet metal forming, argon arc welding and post-weld machining.

[0047] The working principle of the duct arc-shaped radiator is that the core assembly 5 adopting the plate-fin structure, the high-temperature oil from the engine enters the mouth pipe 10 of the duct arc-shaped radiator, the low-temperature air passes through the fin 9 inside the core assembly 5, and heat conduction is carried out between the fin 9 and the mouth pipe 10, so that the heat is exchanged to the low-temperature air flowing through the fin 9 from the outer duct, so that the purpose of cooling the high-temperature oil is achieved. Figure 9 The left side of the oil inlet and outlet end cover 4 is the oil outlet cavity and the oil outlet nozzle, the right side is the oil inlet cavity and the oil inlet nozzle, the bypass cavity is below the oil outlet cavity, the bypass cavity is provided with an oil outlet corresponding to the oil outlet cavity, the bypass cavity is provided with an oil inlet corresponding to the oil inlet cavity, and the bypass valve 3 is located in the bypass cavity.

[0048] Different from the single-layer fin design of the cold edge structure in the prior art, the cold edge of the utility model adopts the multi-layer fin structure, and the hot edge adopts the structure of the mouth pipe 10.

[0049] The above merely provides one of the embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A novel ducted arc heat sink, characterized by, The application relates to a new type of duct arc-shaped radiator. The mounting plate (1) is connected with an engine duct, the surface of the mounting plate (1) connected with the engine duct is a conical surface, the surface far from the engine duct is a circular arc surface, and the circular arc surface is coaxial with the conical surface. The core body assembly (5) is circular arc-shaped, is connected with the circular arc surface of the mounting plate (1) through the circular arc surface of the core body assembly (5), and comprises an air flow channel and an oil flow channel, wherein the air flow channel is parallel to the axis of the conical surface of the mounting plate (1), the oil flow channel is circular arc-shaped, and the oil flow channel is an even number of two flow processes or more than two flow processes. The oil inlet and outlet end cover (4) is arranged at the first end of the corresponding circular arc length direction of the core body assembly (5), the oil inlet and outlet end cover (4) comprises at least one oil inlet cavity, at least one oil outlet cavity and at least one bypass cavity, the oil inlet cavity and the oil outlet cavity are communicated with the oil flow channel of the core body assembly (5), and the bypass cavity is communicated with the oil inlet cavity and the oil outlet cavity respectively. The oil return end cover (6) is arranged at the second end of the corresponding circular arc length direction of the core body assembly (5), and the oil return end cover (6) is communicated with different oil flow channels at the same time. The oil pipe nozzles (2) are arranged on the oil inlet and outlet end cover (4), one of the oil pipe nozzles (2) is communicated with the oil inlet cavity and serves as an oil inlet joint, the other oil pipe nozzle (2) is communicated with the oil outlet cavity and serves as an oil outlet joint, and the oil pipe nozzles (2) extend towards the engine duct after penetrating through the mounting plate (1). The bypass valve (3) is a normally closed valve and is arranged in the bypass cavity of the oil inlet and outlet end cover (4), when the pressure difference between the oil inlet cavity and the oil outlet cavity is greater than a set value, the bypass valve (3) is opened, oil in the oil inlet cavity directly flows into the bypass cavity through the oil flow channel and then flows into the oil outlet cavity and out.

2. A novel ducted arc heat sink according to claim 1, characterized in that: A plurality of lightening grooves are formed in the conical surface of the mounting plate (1), and adjacent lightening grooves are separated by reinforcing ribs.

3. A novel ducted arc heat sink according to claim 1, characterized in that: A through hole is formed in the mounting plate (1) for connecting with the engine duct, and the through hole is distributed along the outer contour line of the mounting plate (1).

4. A novel ducted arc heat sink according to claim 1, characterized in that: The end surface of the oil pipe nozzle (2) is connected with the main engine pipeline through a clamp after butt joint.

5. The new type of duct arc-shaped radiator according to claim 1, characterized in that: The bypass cavity comprises a bypass inlet communicated with the oil inlet cavity and a bypass outlet communicated with the oil outlet cavity. The bypass valve (3) comprises a valve seat, a valve core and a spring, the valve seat is arranged on the oil inlet and outlet end cover (4), the valve core is slidably connected to the valve seat through the spring and is arranged between the bypass inlet and the bypass outlet of the bypass cavity.

6. A novel ducted arc heat sink according to claim 1, characterized in that: The core body assembly (5) comprises alternately stacked mouth organ pipes (10) and fins (9), the internal passage of each layer of mouth organ pipes (10) forms an oil flow channel, and the internal passage formed by the two layers of mouth organ pipes (10) and the fins (9) between the two layers of mouth organ pipes (10) forms an air flow channel.

7. A novel ducted arc heat sink according to claim 1, characterized in that: The circular arc surface of the core body assembly (5) is welded with the circular arc surface of the mounting plate (1).

8. A novel ducted arc heat sink according to claim 1, characterized in that: A H-shaped groove is formed in the circular arc surface of the mounting plate (1).

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