Intercooler integrated device for intermediate case area of engine

Abstract

The invention discloses an intercooler integrated device for an engine intermediate case area, which comprises an intermediate case outer case and an intermediate case inner case, a plurality of support plates are arranged between the intermediate case outer case and the intermediate case inner case, and intercooler mounting modules are fixed on the support plates. And the intercooler mounting module is used for mounting the shunting ring-intercooler integrated module between the intermediate case outer case and the intermediate case inner case. The defects in the prior art can be overcome, and the design and installation work of the newly-added intercooler can be completed on the premise that the original structure is reserved to the maximum degree and a new complex structure is not introduced.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to an intercooler integrated device for the intermediate casing area of an engine. Background Art

[0002] Hypersonic flight is the goal pursued by the next generation of aircraft after powered takeoff flight and supersonic flight. In hypersonic flight propulsion technology, the turbofan ramjet combined engine has always been the most promising power solution. However, at high flight Mach numbers, the total inlet temperature of the turbine engine rises significantly, and the total inlet temperature of the compressor inlet also rises accordingly, reducing the working efficiency of the compressor and thus deteriorating the overall performance of the engine. One of the technical solutions to solve the above problems is to adopt the intercooling technology, that is, an intercooler is arranged in front of the compressor to reduce the compressor inlet temperature and improve the working efficiency of the compressor and the overall performance of the engine.

[0003] In a conventional intercooled engine structure, the installation layout of the intercooler is restricted by the geometric dimensions of multiple components such as the compressor and the outer bypass duct. Under such geometric restrictions, the design of the diffuser channel and the exhaust channel of the intercooler accessory channel and the flow resistance characteristics of the intercooler unit directly affect the airflow loss flowing through the intercooling system. Therefore, it is necessary to study the design of the intercooler accessory channel and the performance of the intercooler outer bypass installation model to obtain an intercooling system that meets the design requirements. However, the limited installation space and strict weight requirements inside the engine are not conducive to direct installation design, bringing great challenges to the installation design of the intercooler. To solve the problem that adding an intercooler to a mature model engine requires a large-scale transformation or even a new design of the original structural features. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an intercooler integrated device for the intermediate casing area of an engine, which can solve the deficiencies of the prior art and complete the design and installation of the newly added intercooler on the premise of maximizing the retention of the original structure and not introducing new complex structures.

[0005] To solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] An intercooler integrated device for the intermediate casing area of an engine includes an outer intermediate casing and an inner intermediate casing. A plurality of support plates are arranged between the outer intermediate casing and the inner intermediate casing. An intercooler installation module is fixed on the support plates, and the intercooler installation module installs a split ring-intercooler integrated module between the outer intermediate casing and the inner intermediate casing.

[0007] Preferably, the thickness of the intercooler mounting module is greater than that of the support plate, and the edge of the intercooler mounting module extends beyond the edge of the support plate by 2-3 mm to serve as a welding space; when the intercooler mounting module is bolted to the splitter ring-intercooler integrated module, a first bolt edge is provided on the side of the intercooler mounting module, and a second bolt edge corresponding to the first bolt edge is provided on the splitter ring-intercooler integrated module.

[0008] Preferably, the splitter ring-intercooler integrated module includes a splitter ring-collection chamber integrated module, and a number of intercooler inlet and outlet manifolds are provided on the splitter ring-collection chamber integrated module. A number of flat heat exchange units are inserted between the splitter ring-collection chamber integrated module and the inner casing of the intermediate casing, and the splitter ring-collection chamber integrated module and the flat heat exchange units are fixedly connected by brazing.

[0009] Preferably, the outer surface of the intercooler mounting module and the outer surface of the splitter ring-collection chamber integrated structure are the same as the outer surface of the engine splitter ring; the outer surface of the engine splitter ring is composed of a splitter ring leading edge, an outer annulus inner wall surface, and an inner annulus outer wall surface. The control equation of the basis function of the Bezier curve fitting method for the splitter ring leading edge is,

[0010] A(t) = ΣA i f i，n (t), 0 ≤ t ≤ 1

[0011]

[0012] The control equations of the outer annulus inner wall surface (508) and the inner annulus outer wall surface (509) are,

[0013]

[0014] Preferably, an air sandwich partition is provided in the inner cavity of the splitter ring-collection chamber integrated module. The air sandwich partition divides the inner cavity of the splitter ring-collection chamber integrated module into an inlet chamber and an outlet chamber, and reinforcing ribs are provided in the air sandwich partition.

[0015] Preferably, the intercooler inlet and outlet manifolds include an intercooler inlet manifold and an intercooler outlet manifold. The intercooler inlet manifold is connected to the inlet chamber, and the intercooler outlet manifold is connected to the outlet chamber.

[0016] Preferably, the outer casing of the intermediate casing, the inner casing of the intermediate casing, and the support plate form a second flow path, and the upper and lower edges of the flat heat exchange unit are in contact with the inner wall of the second flow path.

[0017] Preferably, the thickness of the flat heat exchange unit is 1.1 - 2 mm, the distance between adjacent flat heat exchange units is 2 - 10 mm, the inner side wall of the shunt ring - collector chamber integrated module and the flat heat exchange units form a first flow channel, the wall thickness of the first flow channel is 0.2 - 0.5 mm, both ends of the first flow channel are respectively provided with a first flow channel inlet and a first flow channel outlet, the first flow channel inlet is communicated with the intake chamber, and the first flow channel outlet is communicated with the outlet chamber.

[0018] Preferably, the shapes of 1 or 2 flat heat exchange units adjacent to the support plate are the same as the outer contour surface of the corresponding support plate.

[0019] The beneficial effects brought by adopting the above technical solution are as follows: The intercooler installation module and the shunt ring - collector chamber integrated module of the present invention are based on the original shunt ring structure of the engine, adopt the idea of conformal design, change the inner cavity structure and connection mode of the shunt ring. While ensuring that the outer surface can retain the function of the original shunt ring for reasonably distributing the internal and external flow rates, its inner cavity also serves as the intercooler collector chamber to evenly distribute the cooling working medium to the flat heat exchange units; enabling the integration design of the intercooler structure and the original shunt ring structure of the engine, solving the problem that adding an intercooler to a mature model engine requires a large - scale transformation or even re - design of the original structural features. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a plan view of a specific embodiment of the present invention.

[0021] Figure 2 is a three - dimensional view of a specific embodiment of the present invention.

[0022] Figure 3 is a structural diagram of the intercooler installation module in a specific embodiment of the present invention.

[0023] Figure 4 is a structural diagram of the shunt ring - intercooler integrated module in a specific embodiment of the present invention.

[0024] Figure 5 is a structural diagram of the shunt ring - collector chamber integrated module in a specific embodiment of the present invention.

[0025] Figure 6 is a structural diagram of the flat heat exchange unit in a specific embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Refer to Figure 1-2, this embodiment is an intercooler integrated device installed in the intermediate casing area of the AL-31F engine, including the outer intermediate casing 1 and the inner intermediate casing 2. There are several support plates 3 arranged between the outer intermediate casing 1 and the inner intermediate casing 2. An intercooler installation module 4 is fixed on the support plate 3, and the intercooler installation module 4 installs the splitter ring - intercooler integrated module between the outer intermediate casing 1 and the inner intermediate casing 2. The splitter ring - intercooler integrated module includes a splitter ring - plenum integrated module 5. There are several intercooler inlet and outlet headers 6 arranged on the splitter ring - plenum integrated module 5. Several flat heat exchange units 7 are vertically inserted into the splitter ring - plenum integrated module 5, and the splitter ring - plenum integrated module 5 and the flat heat exchange units 7 are connected and fixed by brazing. The splitter ring - plenum integrated module 5 and the intercooler inlet and outlet headers are integrally formed by 3D printing. The first fluid working medium in the first flow channel exchanges heat with the second fluid working medium in the second flow channel. Both the intercooler installation module 4 and the splitter ring - intercooler integrated module adopt a conformal design, based on the original splitter ring structure of the engine, and the outer surface is completely consistent with the original splitter ring of the engine.

[0027] Refer to Figure 3 , the thickness of the intercooler installation module 4 is greater than that of the support plate 3. The edge of the intercooler installation module 4 extends beyond the edge of the support plate 3 by 2 - 3 mm, serving as a welding space. The intercooler installation module 4 and the splitter ring - intercooler integrated module are connected by bolts. The side of the intercooler installation module 4 is provided with a first bolt edge 402, and the splitter ring - intercooler integrated module is provided with a second bolt edge 502 corresponding to the first bolt edge 402. Through the transition of the intercooler installation module 4, the splitter ring - intercooler integrated module is installed on the original structure of the engine, making the intercooler installation model simpler. There is no need to design an intercooler accessory channel or modify the structural features of the original mature engine model.

[0028] Refer to Figure 4 , the splitter ring - intercooler integrated module includes a splitter ring - plenum integrated module 5. There are several intercooler inlet and outlet headers 6 arranged on the splitter ring - plenum integrated module 5. Several flat heat exchange units 7 are inserted between the splitter ring - plenum integrated module 5 and the inner intermediate casing 2. The splitter ring - plenum integrated module 5 and the flat heat exchange units 7 are connected and fixed by brazing. The flat heat exchange unit 7 adopts a microchannel flat structure and is evenly distributed between the inner intermediate casing 2 and the splitter ring - plenum integrated module 5. Its thickness is small and the spacing is adjustable, which can effectively reduce the flow resistance of the second fluid working medium in the second flow channel. Even when the second fluid working medium is in a high - speed state, the heat exchange structure can still maintain a low flow resistance level. The flat heat exchange unit 7 is vertically inserted into the splitter ring - plenum integrated module 5, that is, vertically and evenly distributed between the splitter ring - plenum integrated module 5 and the inner intermediate casing 2, enhancing the stability of the overall structure and the applicable range of the heat exchange structure.

[0029] Referring to Figure 5 , an air sandwich partition 505 is provided in the inner cavity of the flow splitting ring - plenum integrated module 5. The air sandwich partition 505 divides the inner cavity of the flow splitting ring - plenum integrated module 5 into an intake chamber 503 and an exhaust chamber 504. Reinforcing ribs 506 are provided in the air sandwich partition 505. The intercooler inlet and outlet headers 6 include an intercooler inlet header 601 and an intercooler outlet header 602. The intercooler inlet header 601 is connected to the intake chamber 503, and the intercooler outlet header 602 is connected to the exhaust chamber 504. The purpose of setting the inlet and outlet chambers is to play a certain buffering role for the first fluid medium, making the first fluid medium entering the first flow channel more uniform, which is beneficial to the steady progress of subsequent heat exchange. The reinforcing ribs 506 can enhance the stability of the overall structure. The inlet and outlet headers are round tubes. The purpose of setting the inlet and outlet headers and the inlet and outlet chambers is to play a certain buffering role for the first fluid medium, making the first fluid medium entering the first flow channel more uniform, which is beneficial to the steady progress of subsequent heat exchange.

[0030] The shape of the outer surface 401 of the intercooler installation module and the outer surface 501 of the flow splitting ring - plenum integrated structure is the same as the shape of the engine flow splitting ring outer surface; the engine flow splitting ring outer surface is composed of a flow splitting ring leading edge 507, an outer duct inner wall surface 508, and an inner duct outer wall surface 509. The control equation of the basis function of the Bezier curve fitting method for the flow splitting ring leading edge 507 is

[0031] A(t) = ΣA i f i，n (t), 0 ≤ t ≤ 1

[0032]

[0033] The control equations for the outer duct inner wall surface 508 and the inner duct outer wall surface 509 are

[0034] The design of the flow splitting ring profile according to the aerodynamic requirements can effectively reduce the flow resistance of the second fluid medium in the second flow channel; even when the second fluid medium is in a high - speed state, the installation structure can still keep the flow resistance at a low level.

[0035] Referring to Figure 6, the outer casing 1 of the intermediate casing, the inner casing 2 of the intermediate casing, and the support plate 3 are combined to form a second flow path, that is, the second flow path is set as an open passage structure. The upper edge 702 and the lower edge 701 of the flat heat exchange unit 7 are in contact with the inner wall of the second flow path, and the space in the second flow path can be fully utilized. The thickness of the flat heat exchange unit 7 is 1.1 - 2 mm. The design of the flat heat exchange unit 7 greatly reduces its structural size and provides sufficient flow space for the first fluid working medium. The distance between adjacent flat heat exchange units 7 is 2 - 10 mm. The width of the second flowing working medium flowing through the second flow path is small, and it can fully exchange heat with the first flowing working medium in the flat heat exchange units 7 on both sides. Even in the case of high-speed flow, the heat exchange can still be completed more evenly. The equidistant and uniform arrangement of the flat heat exchange units 7 also ensures the structural stability. The inner side wall of the flow splitting ring - cavity integration module 5 and the flat heat exchange unit 7 are combined to form a first flow path, and the wall thickness of the first flow path is 0.2 - 0.5 mm. The two ends of the first flow path are respectively provided with a first flow path inlet 703 and a first flow path outlet 704. The first flow path inlet 703 is communicated with the intake chamber 503, and the first flow path outlet 704 is communicated with the outlet chamber 504. One flow splitting ring - cavity integration module 5 can deliver the first fluid working medium to multiple flat heat exchange units 7, which can simplify the pipeline for the first fluid working medium to flow into the first flow path. The shapes of 1 or 2 flat heat exchange units 7 adjacent to the support plate 3 are the same as the outer contour surface of the corresponding support plate 7. This curved surface design can further reduce the flow resistance when the second fluid working medium flows into the second flow path. Even when the second fluid working medium is in a high-speed state, the intercooler heat exchange structure can still maintain a low flow resistance.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An intercooler integrated device for the intermediate casing area of an engine, comprising an outer intermediate casing (1) and an inner intermediate casing (2), and a plurality of support plates (3) are arranged between the outer intermediate casing (1) and the inner intermediate casing (2), and is characterized in that: A charge air cooler mounting module (4) is fixed on the support plate (3), and the charge air cooler mounting module (4) mounts the splitter ring - charge air cooler integrated module between the outer casing (1) and the inner casing (2) of the intermediate casing.

2. The intercooler integration device for the engine intermediate case area according to claim 1, characterized in that: The thickness of the charge air cooler mounting module (4) is greater than that of the support plate (3). The edge of the charge air cooler mounting module (4) extends beyond the edge of the support plate (3) by 2 - 3 mm, serving as a welding space. When the charge air cooler mounting module (4) is bolt - connected to the splitter ring - charge air cooler integrated module, a first bolt edge (402) is provided on the side of the charge air cooler mounting module (4), and a second bolt edge (502) corresponding to the first bolt edge (402) is provided on the splitter ring - charge air cooler integrated module.

3. The intercooler integration device for the engine intermediate case area according to claim 1, characterized in that: The splitter ring - charge air cooler integrated module includes a splitter ring - plenum integrated module (5). A number of charge air cooler inlet and outlet headers (6) are provided on the splitter ring - plenum integrated module (5). A number of flat heat - exchange units (7) are inserted between the splitter ring - plenum integrated module (5) and the inner casing (2) of the intermediate casing, and the splitter ring - plenum integrated module (5) and the flat heat - exchange units (7) are fixed by brazing.

4. The intercooler integration device for the engine intermediate case area according to claim 3, characterized in that: The shape of the outer surface (401) of the charge air cooler mounting module and the outer surface (501) of the splitter ring - plenum integrated structure is the same as the shape of the engine splitter ring outer surface; The engine splitter ring outer surface is composed of a splitter ring leading edge (507), an outer annulus inner wall surface (508), and an inner annulus outer wall surface (509). The control equation of the basis function of the Bezier curve fitting method for the splitter ring leading edge (507) is A(t) = ΣA i f i，n (t), 0 ≤ t ≤ 1 The control equations for the outer annulus inner wall surface (508) and the inner annulus outer wall surface (509) are 5. The intercooler integration device for the engine intermediate case area according to claim 3, characterized in that: An air - sandwich partition (505) is arranged in the inner cavity of the splitter ring - plenum integrated module (5). The air - sandwich partition (505) divides the inner cavity of the splitter ring - plenum integrated module (5) into an inlet chamber (503) and an outlet chamber (504), and stiffening ribs (506) are arranged in the air - sandwich partition (505).

6. The intercooler integration device for the engine intermediate case area according to claim 5, characterized in that: The charge air cooler inlet and outlet headers (6) include a charge air cooler inlet header (601) and a charge air cooler outlet header (602). The charge air cooler inlet header (601) is connected to the inlet chamber (503), and the charge air cooler outlet header (602) is connected to the outlet chamber (504).

7. The intercooler integration device for the engine intermediate case area according to claim 3, characterized in that: The outer casing (1) of the intermediate casing, the inner casing (2) of the intermediate casing, and the support plate (3) form a second flow path, and the upper edge (702) and the lower edge (701) of the flat heat - exchange unit (7) are in contact with the inner wall of the second flow path.

8. The intercooler integration device for the engine intermediate case area according to claim 7, characterized in that: The thickness of the flat heat - exchange unit (7) is 1.1 - 2 mm, the spacing between adjacent flat heat - exchange units (7) is 2 - 10 mm. The inner side wall of the splitter ring - plenum integrated module (5) and the flat heat - exchange units (7) form a first flow path. The wall thickness of the first flow path is 0.2 - 0.5 mm. The two ends of the first flow path are respectively provided with a first flow path inlet (703) and a first flow path outlet (704). The first flow path inlet (703) communicates with the inlet chamber (503), and the first flow path outlet (704) communicates with the outlet chamber (504).

9. The intercooler integration device for the engine intermediate case area according to claim 8, characterized in that: The shape of one or two flat plate heat exchange units (7) adjacent to the support plate (3) is the same as the outer contour surface of the corresponding support plate (7).

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