Aircraft piston engine heat exchange device

Abstract

The utility model discloses an aircraft piston engine heat exchange device which comprises an exchange outer cylinder installed on the outer wall of a silencing cylinder, and an annular cavity is formed between the inner wall of the exchange outer cylinder and the outer wall of the silencing cylinder. Comprising a foam copper core which is laid in the annular cavity. Comprising an air inlet pipe and an exhaust pipe, and the air inlet pipe and the exhaust pipe are connected to the outer end of the exchange outer cylinder and communicate with the annular cavity. According to the waste heat recovery device, the foamy copper core is installed in the annular cavity, and the rhombic opening is combined, so that the air retention time is prolonged, and the waste heat recovery efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aero-engine heat management technical field especially relates to a plane piston engine heat exchange device. BACKGROUND

[0002] Piston aero-engine refers to the reciprocating internal combustion engine that provides aircraft flight power. A 4-stroke, spark plug ignited gasoline engine. The crankshaft rotates two circles, and each piston reciprocates in the cylinder four times to complete a cycle. The piston is called "a stroke" each time. The four strokes are intake, compression, expansion and exhaust in turn. It is mainly composed of crankshaft, connecting rod, piston, cylinder, gas distribution mechanism and case.

[0003] In the prior art, the plane piston engine heat exchange device has large structure weight, low heat exchange efficiency, and the effect of transmitting warm air to the cabin is not obvious, so a plane piston engine heat exchange device is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] (I) Utility model purpose

[0005] To solve the technical problems in the background art, the utility model provides a plane piston engine heat exchange device, which installs a foam copper core in the annular cavity, and combines a rhombic opening to prolong the air residence time and significantly improve the waste heat recovery efficiency.

[0006] (II) Technical scheme

[0007] The utility model provides a plane piston engine heat exchange device, which comprises an exchange outer cylinder installed on the outer wall of a muffler cylinder, and an annular cavity is formed between the inner wall of the exchange outer cylinder and the outer wall of the muffler cylinder.

[0008] It comprises a foam copper core, which is laid in the annular cavity.

[0009] It comprises an air inlet pipe and an air outlet pipe, which are respectively connected to the outer end of the exchange outer cylinder and communicate with the annular cavity.

[0010] Preferably, the foam copper core is in a mesh structure, and a plurality of rhombic openings are arranged on the surface of the foam copper core.

[0011] Preferably, the surface of the foam copper core is plated with a nickel layer.

[0012] Preferably, side edge clamping rings are sealingly clamped on both sides of the foam copper core at the openings of both sides of the exchange outer cylinder.

[0013] Preferably, the air inlet pipe, the side edge clamping ring, the exchange outer cylinder and the air outlet pipe are all made of metal 3D printing.

[0014] Preferably, the air inlet pipe and the air outlet pipe are arranged in a staggered manner.

[0015] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:

[0016] The aircraft piston engine heat exchange device prolongs the air residence time and improves the warm air heating effect by installing the foam copper core in the annular cavity and combining the diamond-shaped openings; and the air inlet pipe, the side edge clamping ring, the exchange outer cylinder and the air outlet pipe are all made of metal 3D printing, the 3D printed parts can reduce the weight by 30%, the overall device weight is reduced by 25% compared with the traditional scheme, and the aircraft lightweight demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 A structural schematic view of the aircraft piston engine heat exchange device is provided in the utility model.

[0018] Fig. 2 A perspective view of the foam copper core in the aircraft piston engine heat exchange device is provided in the utility model.

[0019] Fig. 3 An exploded view of the exchange outer cylinder and the side edge clamping ring in the aircraft piston engine heat exchange device is provided in the utility model.

[0020] The drawings show that: 1, the side edge clamping ring; 2, the foam copper core; 3, the diamond-shaped opening; 4, the air inlet pipe; 5, the annular cavity; 6, the exchange outer cylinder; 7, the air outlet pipe. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the device or element indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, welding, riveting, bonding and the like, or detachable connection, threaded connection, key connection, pin connection and the like, or integrally connected, can be mechanical connection, or electrical connection, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0024] As Figs. 1-3 Indicated, a kind of aircraft piston engine heat exchange device is provided in the utility model, including the exchange outer tube 6 being installed in the outer wall of muffler cylinder, annular cavity 5 is formed between the inner wall of exchange outer tube 6 and the outer wall of muffler cylinder;

[0025] Including foam copper core 2, foam copper core 2 is laid in annular cavity 5, to enhance oxidation resistance and heat conductivity performance;

[0026] Including air inlet pipe 4 and exhaust pipe 7, air inlet pipe 4 and exhaust pipe 7 are connected to the outer end of exchange outer tube 6 and are connected with annular cavity 5.

[0027] In the utility model, when engine is running, exhaust muffler cylinder surface will release heat due to high temperature, foam copper core 2 in exchange outer tube 6 rapidly absorbs heat, when air pump connected with exhaust pipe 7 is started, air pump can draw the air outside into the inside of exchange outer tube 6 by air inlet pipe 4, and cooperate with foam copper core 2, cold air spirally flows in annular cavity 5, is heated after fully absorbing heat, is finally transported to cabin by exhaust pipe 7, realizes efficient heating.‌

[0028] In an alternative embodiment, foam copper core 2 is a mesh structure, and a plurality of equidistantly distributed diamond-shaped openings 3 are formed on the surface of foam copper core 2.

[0029] It should be noted that the surface of foam copper core 2 is a mesh structure and a plurality of equidistantly distributed diamond-shaped openings 3 are formed, for increasing heat exchange area and improving heat conduction efficiency.

[0030] In an alternative embodiment, a nickel layer is plated on the surface of foam copper core 2.

[0031] It should be noted that the nickel layer is plated to solve the problem of high-temperature oxidation of copper matrix, and the porous structure and high thermal conductivity of foam copper are used to improve the heat exchange efficiency.‌

[0032] In an alternative embodiment, side edge clamping rings 1 are sealingly clamped on both sides of the opening of exchange outer tube 6 and on both sides of foam copper core 2, and the side edge clamping rings 1 adopt a sealing structure to ensure no leakage under high-temperature working conditions.

[0033] It should be noted that the foam copper core 2 is replaced through the side clamping ring 1 on both sides, and the side clamping ring 1 at both ends is located on the outer wall of the muffler cylinder during installation, so that the installation of the exchange outer cylinder 6 is realized.

[0034] In an optional embodiment, the air inlet pipe 4, the side clamping ring 1, the exchange outer cylinder 6 and the air outlet pipe 7 are all metal 3D printed.

[0035] It should be noted that since the air inlet pipe 4, the side clamping ring 1, the exchange outer cylinder 6 and the air outlet pipe 7 are all metal 3D printed, the 3D printed parts can reduce the weight by 30%, the overall device weight is reduced by 25% compared with the traditional scheme, and the aircraft lightweight demand is met.

[0036] In an optional embodiment, the air inlet pipe 4 and the air outlet pipe 7 are arranged in a staggered manner.

[0037] It should be noted that the air inlet pipe 4 and the air outlet pipe 7 are not arranged in a straight line, combined with the diamond-shaped opening 3, the air residence time is prolonged, and the heat exchange efficiency is improved by more than 40%.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An aircraft piston engine heat exchange device, characterized in that, The muffler comprises an exchange outer cylinder (6) installed on the outer wall of the muffler, and an annular cavity (5) is formed between the inner wall of the exchange outer cylinder (6) and the outer wall of the muffler. The muffler comprises a foamed copper core (2) laid in the annular cavity (5). The muffler comprises an air inlet pipe (4) and an air outlet pipe (7) respectively connected to the outer ends of the exchange outer cylinder (6) and communicating with the annular cavity (5).

2. An aircraft piston engine heat exchange device according to claim 1, characterised in that, The foamed copper core (2) has a mesh structure, and a plurality of rhombic openings (3) are arranged on the surface of the foamed copper core (2) at equal intervals.

3. An aircraft piston engine heat exchange device as claimed in claim 1, characterised in that, The surface of the foamed copper core (2) is plated with a nickel layer.

4. An aircraft piston engine heat exchange device as claimed in claim 1, wherein, Side edge clamping rings (1) are clamped and sealed on both sides of the exchange outer cylinder (6) and located on both sides of the foamed copper core (2).

5. An aircraft piston engine heat exchange device according to claim 4, characterised in that, The air inlet pipe (4), the side edge clamping ring (1), the exchange outer cylinder (6) and the air outlet pipe (7) are all made of metal 3D printing.

6. An aircraft piston engine heat exchange device as claimed in claim 1, characterised in that, The air inlet pipe (4) and the air outlet pipe (7) are arranged in a staggered manner.

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