Aircraft piston engine air inlet and entraining device

Abstract

The utility model discloses an aircraft piston engine air inlet and entraining device which comprises an air filter and an air filter protective cover, a connector is installed at the air outlet end of the air filter, the air filter is connected with an air inlet of an aircraft engine through the connector, the air filter is connected into the air filter protective cover in a clamped mode, and the air filter protective cover is connected with the air filter. An alignment sleeve is installed on the side edge of the air filter protective cover, an open hole is formed in the engine cover in a penetrating mode, a connecting sleeve is arranged on the outer end face of the engine cover and located at the open hole, the connecting sleeve is connected with an air guiding pipe through a connecting structure, and an air outlet channel of the air guiding pipe is located in the alignment sleeve. A filtering assembly is arranged at the joint of the air guiding pipe and the interior of the connecting sleeve. According to the air inlet system, the problems of poor maintainability, low filtering efficiency and the like of a traditional air inlet system are solved, and the dual purposes of prolonging the service life and reducing the maintenance cost are synchronously achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of piston engine especially relates to a plane piston engine air intake air guide device. BACKGROUND

[0002] In the stable operation process of the plane piston engine, the suction of the appropriate cold air is very important, because the plane piston engine generates a large amount of heat when continuously running, if the temperature is not effectively reduced in time, the engine performance is likely to be reduced due to overheating, even failure, affect the flight safety, therefore, the introduction of the appropriate cold air becomes the key measure to control the engine working temperature.

[0003] The existing plane piston engine air intake system has two technical bottlenecks: first, the hose connection mode between the air intake air guide device and the engine body and the engine hatch cover has the problems of poor operability, low work efficiency during installation, debugging and maintenance detection;Second, the air filter system adopts a single filter element structure, and the interception efficiency of the suspended particulate matter with large particle size is insufficient.Because the rapid deposition of large-particle pollutants on the filter material surface forms a dense blocking layer, the effective filtration area of the filter element is sharply reduced, so that its service life is shortened compared with the conventional working condition, and once the service life of the air filter is shortened, frequent replacement is required, thereby increasing the maintenance cost, and therefore a plane piston engine air intake air guide device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0004] (I) Utility model purpose

[0005] To solve the technical problems in the background art, the utility model provides a plane piston engine air intake air guide device, which solves the problems of poor maintainability, low filtration efficiency and the like of the traditional air intake system, and simultaneously realizes the dual objectives of service life extension and maintenance cost reduction.

[0006] (II) Technical scheme

[0007] The utility model provides a plane piston engine air intake air guide device, including air filter and air filter protection cover, the air filter is installed on the gas outlet end and is connected with the plane engine air inlet through the interface, the air filter is clamped in the inside of the air filter protection cover, the side of air filter protection cover is installed with alignment sleeve, still include engine cover, the opening is passed through in the engine cover, the engine cover outer end surface and located the opening place are equipped with the connecting sleeve pipe, the connecting sleeve pipe is connected with the air guide pipe through the connecting structure, the air outlet of the air guide pipe is located in the alignment sleeve, the air guide pipe and the connecting sleeve pipe inside the junction is equipped with filter assembly.

[0008] Preferably, the connecting structure comprises a first fixing ring, a second fixing ring and fixing screws, the first fixing ring is fixed to the bottom of the outer end surface of the air induction pipe, the second fixing ring is fixed to the top of the outer end surface of the connecting sleeve, the fixing screws are arranged in an annular array, penetrating through the first fixing ring and extending to the inside of the second fixing ring, and the fixing screws are in threaded connection with the second fixing ring.

[0009] Preferably, a groove is formed in the outer end surface of the air filter protective cover.

[0010] Preferably, the inner diameter of the alignment sleeve is slightly larger than the outer diameter of the air outlet of the air induction pipe.

[0011] Preferably, the filter assembly comprises a first mounting plate and a second mounting plate, the first mounting plate is arranged at the bottom of the inner wall of the air induction pipe, and the second mounting plate is arranged at the top of the inner wall of the connecting sleeve.

[0012] Preferably, the first mounting plate and the second mounting plate are conical, and a plurality of filter holes are arranged at equal intervals in the second mounting plate and the first mounting plate.

[0013] Preferably, a filter plate is arranged between the second mounting plate and the first mounting plate.

[0014] Compared with the prior art, the above technical scheme of the utility model has the following beneficial technical effects:

[0015] The aircraft piston engine air induction device separates the air filter protective cover of the engine from the air inlet of the engine fairing, facilitates disassembly under the condition that the air induction function of the engine is normal, solves the problems of poor maintainability and low filtering efficiency of the traditional air induction system, and simultaneously realizes the dual goals of prolonging the service life and reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure diagram of the aircraft piston engine air induction device is provided.

[0017] Figure 2 A rear view of the aircraft piston engine air induction device is provided.

[0018] Figure 3 A partial sectional view of the aircraft piston engine air induction device is provided.

[0019] Figure 4 An aircraft piston engine air induction device is provided. Figure 3 An enlarged view of A.

[0020] Figure 5The utility model provides an air inlet air guide device of an airplane piston engine Figure 3 An enlarged view of the middle B.

[0021] Reference signs: 1, air filter protection cover, 2, alignment sleeve, 3, air guide pipe, 4, air filter, 5, slotted, 6, connecting sleeve, 7, engine cover, 8, interface, 9, first mounting plate, 10, first fixed ring, 11, fixed screw, 12, second fixed ring, 13, filter plate, 14, second mounting plate. DETAILED DESCRIPTION

[0022] To make the purpose, technical scheme and advantages of the utility model clearer and more apparent, 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.

[0023] 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", "the other end" and the like 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 does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0024] 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 understood broadly, for example, "connection" can be fixed connection, welding, riveting, bonding and the like, or can be 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 ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] As Figures 1-5The utility model provides a kind of aircraft piston engine air intake air guide device shown, including air filter 4 and air filter protective cover 1, the air outlet end of air filter 4 is equipped with interface 8, air filter 4 is connected with aircraft engine air inlet by interface 8, air filter 4 is connected in the inside of air filter protective cover 1, air filter protective cover 1 side is equipped with alignment sleeve 2, further include engine cover 7, the opening is penetrated in engine cover 7, and the outer end surface of engine cover 7 and located opening is equipped with connecting sleeve 6, connecting sleeve 6 is connected with air guide pipe 3 by connecting structure, the air outlet of air guide pipe 3 is located in alignment sleeve 2, and the connecting place of air guide pipe 3 and connecting sleeve 6 inside is equipped with filter assembly, by filter assembly, it can filter larger impurities;The inner diameter of alignment sleeve 2 is slightly larger than the outer diameter of the air outlet of air guide pipe 3, wherein connecting sleeve 6 and engine cover 7 are integrated structure.

[0026] In the utility model, when engine cover 7 is opened, connecting sleeve 6 drives air guide pipe 3 to move, so that the air outlet of air guide pipe 3 is separated from alignment sleeve 2, so that it is convenient to disassemble and assemble under the condition that the aircraft piston engine air intake function is normal, and it is convenient to maintain;And when starting aircraft piston engine, the inhaled gas can be pre-filtered by filter assembly, so that some larger impurities are filtered out first, and then the inhaled gas is filtered again by air filter 4, since some impurities have been filtered out by filter assembly, the service life of air filter 4 is improved.

[0027] In an optional embodiment, the filter assembly includes a first mounting plate 9 and a second mounting plate 14, the first mounting plate 9 is arranged at the bottom of the inner wall of the air guide pipe 3, the second mounting plate 14 is arranged at the top of the inner wall of the connecting sleeve 6, the first mounting plate 9 and the second mounting plate 14 are conical, and a plurality of filter holes are equally penetrated through the second mounting plate 14 and the first mounting plate 9.

[0028] It should be noted that the filter plate 13 can be installed by the first mounting plate 9 and the second mounting plate 14.

[0029] The second mounting plate 14 is conical, and the second mounting plate 14 can slide some larger impurities through the inclined surface of the second mounting plate 14 to the edge of the cone, to prevent blockage.

[0030] In an optional embodiment, a filter plate 13 is arranged between the second mounting plate 14 and the first mounting plate 9.

[0031] It should be noted that the filter plate 13 can filter some impurities smaller than the filter holes.

[0032] In an alternative embodiment, the connecting structure comprises the first fixing ring 10, the second fixing ring 12 and the fixing screws 11, the first fixing ring 10 is fixed to the bottom of the outer end surface of the air intake pipe 3, the second fixing ring 12 is fixed to the top of the outer end surface of the connecting sleeve 6, the fixing screws 11 are arranged in an annular array and extend through the first fixing ring 10 and into the second fixing ring 12, and the fixing screws 11 are threadedly connected with the second fixing ring 12.

[0033] It should be noted that when the filter plate 13 needs to be replaced, the fixing screws 11 are rotated to separate the fixing screws 11 from the first fixing ring 10 and the second fixing ring 12, and then the air intake pipe 3 and the connecting sleeve 6 are separated, so that the first mounting plate 9 and the second mounting plate 14 connected with the air intake pipe 3 can be separated, and then the filter plate 13 can be removed, and then the filter plate 13 to be replaced is placed on the inner end surface of the second mounting plate 14, and then the first fixing ring 10 and the second fixing ring 12 are contacted, and the fixing screws 11 are rotated in the opposite direction to fix the first fixing ring 10 and the second fixing ring 12, so that the air intake pipe 3 and the connecting sleeve 6 can be fixed, thereby achieving the installation of the filter plate 13.

[0034] In an alternative embodiment, the outer end surface of the air filter protective cover 1 is provided with a slot 5.

[0035] It should be noted that the cold air emitted by the cooling device installed in the engine can enter the air filter 4 through the slot 5.

[0036] Although the embodiments of the present application have been shown and described, it should be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An air intake air-bleed device for an aircraft piston engine, comprising an air filter (4) and an air filter protective cover (1), an interface (8) being mounted on the air outlet end of the air filter (4), the air filter (4) being connected to the air intake of the aircraft engine through the interface (8), the air filter (4) being clamped inside the air filter protective cover (1), a positioning sleeve (2) being mounted on the side of the air filter protective cover (1), characterized in that, Also include the engine cover (7), the engine cover (7) is through the opening, the engine cover (7) outer end surface and located at the opening is provided with a connecting sleeve (6), the connecting sleeve (6) is connected with the air pipe (3) through the connecting structure, the air pipe (3) gas outlet is located in the alignment sleeve (2), the air pipe (3) and the connecting sleeve (6) inside the connecting part is provided with a filter assembly.

2. An aircraft piston engine bleed air device according to claim 1, characterized in that The connecting structure includes a first fixed ring (10), a second fixed ring (12) and a fixed screw (11), the first fixed ring (10) is fixed to the bottom of the outer end surface of the air pipe (3), the second fixed ring (12) is fixed to the top of the outer end surface of the connecting sleeve (6), the fixed screw (11) is arranged in the first fixed ring (10) and extends to the inside of the second fixed ring (12), the fixed screw (11) and the second fixed ring (12) are screw connected.

3. An aircraft piston engine bleed air device according to claim 1, characterized in that The outer end surface of the air filter protective cover (1) is provided with a slot (5).

4. An aircraft piston engine bleed air device according to claim 1, characterized in that The inner diameter of the alignment sleeve (2) is slightly larger than the outer diameter of the air pipe (3) gas outlet.

5. An aircraft piston engine bleed air device according to claim 1, characterized in that The filter assembly includes a first mounting plate (9) and a second mounting plate (14), the first mounting plate (9) is arranged on the bottom of the inner wall of the air pipe (3), the second mounting plate (14) is arranged on the top of the inner wall of the connecting sleeve (6).

6. An aircraft piston engine bleed air device according to claim 5, characterized in that The first mounting plate (9) and the second mounting plate (14) are conical, and a plurality of filter holes are arranged on the first mounting plate (9) and the second mounting plate (14) at equal intervals.

7. An aircraft piston engine bleed air device according to claim 6, characterized in that The second mounting plate (14) and the first mounting plate (9) are placed with a filter plate (13).

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