Air inlet pipe of engine

Abstract

The utility model discloses an air inlet pipe of an engine, which belongs to the technical field of engines and comprises a connecting section, an inclined channel section and an air inlet section which are sequentially connected. The connecting section is connected with an air inlet of the aero-engine; the axial direction of an air inlet of the aero-engine is along the advancing direction of the naval vessel The end where the connecting section is located in the axial direction is the left end, and the end where the air inlet section is located is the right end; the left end of the inclined channel section is communicated with the right end of the connecting section, the pipeline of the inclined channel section inclines towards the lower right side from left to right, and the inclination angle is alpha; the pipeline of the air inlet section inclines towards the lower right side from left to right, and the inclination angle is theta and alphagt; according to the utility model, water can be effectively prevented from entering the engine along the air inlet channel, and the stealth of the ultra-high-speed aero-engine can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, specifically relating to an engine intake pipe. Background Technology

[0002] Hypersonic aero engines have the advantages of high speed and mature technology. Applying hypersonic engines to ships can effectively increase the speed of ships.

[0003] However, applying hypersonic aero engines to naval vessels requires redesigning the air intake to prevent water and air from entering the engine during intake. Furthermore, in special circumstances, naval vessels may require radar stealth capabilities, necessitating an air intake design that also meets radar stealth requirements. Utility Model Content

[0004] In view of this, the present invention provides an engine air intake pipe that can effectively prevent water from entering the engine along the air intake channel, and also helps to achieve the stealth of ultra-high speed aero engines.

[0005] This utility model is achieved through the following technical solution:

[0006] An engine intake pipe is installed at the air inlet of an aircraft engine to enable air intake for the aircraft engine, comprising a connecting section, an inclined channel section and an air inlet section connected in sequence.

[0007] The connecting section connects to the air intake of the aircraft engine;

[0008] The axial direction of the aircraft engine air intake is along the forward direction of the ship; let the end where the connecting section along the axial direction is located be the left end, and the end where the air intake section is located be the right end.

[0009] The left end of the inclined channel section is connected to the right end of the connecting section. The pipe of the inclined channel section slopes downward from left to right with an angle of α. The pipe of the air inlet section slopes downward from left to right with an angle of θ, where α > θ.

[0010] Furthermore, a grille is provided at the air intake end face of the air intake section.

[0011] Furthermore, the connection end face between the air inlet section and the inclined channel section is in the vertical direction. The air inlet section is a tubular structure formed by a rectangular plate I at the top, a rectangular plate II at the bottom, and two quadrilateral side plates on both sides. The upper side of the quadrilateral side plates is longer than the lower side. The air inlet of the air inlet section is an inclined opening that is longer at the top and shorter at the bottom.

[0012] Furthermore, the air intake section is constricted from the right end to the left end.

[0013] Furthermore, the inclined channel section is a tubular structure formed by two parallel rectangular plates at the top and bottom and two trapezoidal plates on both sides; the cross-section of the connection end between the inclined channel section and the connecting section is perpendicular to the rectangular plate of the inclined channel section 4.

[0014] Furthermore, the connecting section is diffused from right to left, and the connecting end face of the connecting section and the air inlet of the aircraft engine is square and vertical, with a circular interface on the end face for fixed connection with the air inlet of the aircraft engine.

[0015] Furthermore, the connecting section is sealed to the air intake of the aircraft engine.

[0016] Beneficial effects:

[0017] (1) The present invention provides an engine intake pipe with an inclined channel section. The inclined channel section uses an upward air intake slope to increase resistance, which can effectively prevent water from entering the engine along the air intake channel. Moreover, the inclined channel section can also change the radar signal reflection direction to achieve concealment of the air intake, thereby contributing to the stealth of ultra-high-altitude ships.

[0018] (2) The present invention has a grille at the air intake end face of the air intake section, which can ensure that the flying objects cannot enter the engine during the operation of the ultra-high speed ship. At the same time, the grille can also reflect radar signals, so that the air intake pipe can avoid radar detection and form a shield.

[0019] (3) The air inlet of this utility model is a slanted opening that is longer at the top and shorter at the bottom. On the one hand, water splashed from the top to the air inlet can be blocked by the rectangular plate I to prevent it from entering the air inlet; water splashed from the bottom to the air inlet is reflected by the rectangular plate I and then blocked by the slanted channel section to prevent it from entering the air inlet; on the other hand, the slanted opening can also change the direction of radar signal reflection to achieve the function of concealment.

[0020] (4) The air inlet section of this utility model is tapered from the right end to the left end, which is conducive to the air entering the air inlet pipe under the action of ram pressure during the operation of ultra-high speed ships.

[0021] (5) The connecting section of this utility model is sealed to the air inlet of the aircraft engine to ensure that air can fully enter the engine and make full use of the air. Attached Figure Description

[0022] Figure 1 This is an installation diagram of the present invention;

[0023] Figure 2 The isometric view of the engine intake pipe of this utility model Figure I ;

[0024] Figure 3 The isometric view of the engine intake pipe of this utility model Figure II ;

[0025] Among them, 1-aircraft engine air inlet, 2-engine air inlet pipe, 3-connecting section, 4-sloping channel section, 5-air inlet section, and 6-grille. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] This embodiment provides an engine intake manifold, see attached document. Figure 1 It is installed at the air intake 1 of the aircraft engine to enable the aircraft engine to take in air.

[0028] See appendix Figure 2 and 3 The engine intake pipe 2 includes a connecting section 3, an inclined channel section 4, and an intake section 5 connected in sequence; the connecting section 3 is connected to the aero-engine intake 1.

[0029] The axial direction of the aircraft engine air intake 1 is along the forward direction of the ship; let the end where the connecting section 3 is located along the axial direction be the left end, and the end where the air intake section 5 is located be the right end.

[0030] The left end of the inclined channel section 4 is connected to the right end of the connecting section 3. The pipe direction of the inclined channel section 4 is inclined from left to right and downward to the right, and the inclination angle is α. The pipe direction of the air inlet section 5 is inclined from left to right and downward to the right, and the inclination angle is θ (θ can be equal to 0), α>θ.

[0031] The engine intake pipe 2 provided in this embodiment is equipped with an inclined channel section 4. The inclined channel section 4 uses an upward air intake ramp to increase drag, which can effectively prevent water from entering the engine along the air intake channel. Moreover, the inclined channel section 4 can also change the radar signal reflection direction to achieve concealment of the air intake, thereby contributing to the stealth of ultra-high-altitude ships.

[0032] In one embodiment, a grille 6 is provided at the air intake end face of the air intake section 5, which can ensure that flying objects cannot enter the engine during the operation of the ultra-high speed ship. At the same time, the grille 6 can also reflect radar signals, so that the air intake pipe can avoid radar detection and form a shield.

[0033] In one embodiment, the connection end face between the air inlet section 5 and the inclined channel section 4 is vertical. The air inlet section 5 is a tubular structure formed by a rectangular plate I at the top, a rectangular plate II at the bottom, and two quadrilateral side plates on both sides. The upper side of the quadrilateral side plates is longer than the lower side. The air inlet of the air inlet section 5 is an inclined opening that is longer at the top and shorter at the bottom. In this embodiment, the air inlet of the air inlet section 5 is an inclined opening that is longer at the top and shorter at the bottom. On the one hand, water splashed from the top to the air inlet can be blocked by the rectangular plate I to prevent it from entering the air inlet. Water splashed from the bottom to the air inlet is reflected by the rectangular plate I and then blocked by the inclined channel section 4 to prevent it from entering the air inlet. On the other hand, the inclined opening can also change the direction of radar signal reflection to achieve the function of concealment.

[0034] In one embodiment, the air intake section 5 is constricted from the right end to the left end; the cross-sectional area of ​​the air intake at the right end is large, which is beneficial for air to enter the air intake pipe under the action of ram pressure during the operation of the ultra-high speed ship.

[0035] In one embodiment, the inclined channel section 4 is a tubular structure formed by two parallel rectangular plates at the top and bottom and two trapezoidal plates on both sides; the cross section of the connection end between the inclined channel section 4 and the connecting section 3 is perpendicular to the rectangular plate of the inclined channel section 4.

[0036] The connecting section 3 is diffused from right to left. The connecting end face of the connecting section 3 and the air inlet 1 of the aircraft engine is square and vertical. A circular interface is provided on the end face for fixed connection with the air inlet 1 of the aircraft engine.

[0037] In one embodiment, the connecting section 3, the inclined channel section 4, and the air inlet section 5 are integrally formed or welded together; the grille 6 is welded to the right end of the air inlet section 5.

[0038] In one embodiment, the connecting section 3 is sealed to the air inlet 1 of the aircraft engine to ensure that air can fully enter the engine and make full use of the air.

[0039] Waterproofing principle:

[0040] When water splashes onto the air intake section 5 from above, the rectangular plate I located above the air intake section 5 blocks the water; when water enters the air intake section 5 horizontally, the inclined channel section 4 generates upward resistance to the water, preventing the water from entering the aero engine; when water splashes onto the air intake section 5 from below, the rectangular plate I located above the air intake section 5 reflects the water, and if it enters the air intake pipe again, it will continue to be blocked by the inclined channel section 4. In summary, the air intake pipe is designed to prevent water from entering the engine from all directions.

[0041] Stealth principle:

[0042] On the one hand, the grille 6 located at the air intake section 5 can initially reflect and shield radar signals. On the other hand, the oblique passage section 4 and the oblique opening of the air intake section 5 also reflect radar signals, changing the transmission direction of radar signals, thereby achieving the stealth of the air intake pipe, which in turn helps to achieve the stealth of the ship.

[0043] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An engine intake pipe, installed at the air inlet of an aircraft engine, for realizing air intake of the aircraft engine, characterized in that, It includes a connecting section, an inclined channel section, and an air inlet section connected in sequence; The connecting section connects to the air intake of the aircraft engine; The axial direction of the aircraft engine air intake is along the forward direction of the ship; let the end where the connecting section along the axial direction is located be the left end, and the end where the air intake section is located be the right end. The left end of the inclined channel section is connected to the right end of the connecting section. The pipe of the inclined channel section slopes downward from left to right with an angle of α. The pipe of the air inlet section slopes downward from left to right with an angle of θ, where α > θ.

2. The engine intake pipe as described in claim 1, characterized in that, A grille is provided at the air intake end face of the air intake section.

3. An engine intake pipe as described in claim 1 or 2, characterized in that, The connection end face between the air inlet section and the inclined channel section is in the vertical direction. The air inlet section is a tubular structure formed by a rectangular plate I at the top, a rectangular plate II at the bottom, and two quadrilateral side plates on both sides. The upper side of the quadrilateral side plates is longer than the lower side. The air inlet of the air inlet section is an inclined opening that is longer at the top and shorter at the bottom.

4. The engine intake pipe as described in claim 1, characterized in that, The air intake section is constricted from the right end to the left end.

5. An engine intake pipe as described in claim 1, characterized in that, The inclined passage section is a tubular structure formed by two parallel rectangular plates at the top and bottom and two trapezoidal plates on both sides; the cross section at the connection end between the inclined passage section and the connecting section is perpendicular to the rectangular plate of the inclined passage section.

6. An engine intake manifold as described in claim 1 or 5, characterized in that, The connecting section is radiating from right to left. The connecting end face of the connecting section and the air inlet of the aircraft engine is square and vertical. A circular interface is provided on the end face for fixed connection with the air inlet of the aircraft engine.

7. An engine intake pipe as described in claim 1, characterized in that, The connecting section is sealed to the air intake of the aircraft engine.

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