Stealth aircraft engine leaked oil discharging device

Abstract

The utility model belongs to the technical field of aircraft engine oil leakage discharging, and particularly relates to a stealth aircraft engine oil leakage discharging device which comprises a turbofan engine, an outer culvert main injection pipe, a mixing pipeline and a leakage discharging stealth grid. When the system runs, external air enters the engine compartment from the air inlet stealth grating to serve as ejected airflow, the outer culvert main ejection pipe ejects the ejected airflow to drive air in the compartment to ventilate and cool the engine compartment on one hand, and ejects an oil-gas mixture of the engine residual oil tank and the oil-gas separator on the other hand to drive the engine compartment to cool the engine compartment. And the oil-gas mixture is conveyed to the leakage-discharging stealth grating, and then the oil-gas mixture is discharged out of the machine through the leakage-discharging stealth grating. The engine compartment can be ventilated and cooled while the stealth performance of an aircraft is guaranteed, damage of engine leakage to the stealth performance of the aircraft is reduced, and the interior of the engine compartment can be ventilated and cooled; meanwhile, the structure is simple, and the engineering feasibility is high.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aircraft engine oil leakage discharge, and particularly relates to a stealth aircraft engine oil leakage discharge device. BACKGROUND

[0002] The functions of the aircraft oil leakage discharge system mainly include: 1) discharging the normal and accidental leakage of fuel, lubricating oil and hydraulic oil of the engine and its accessories to the outside of the aircraft, preventing the leakage of fuel and lubricating oil from being stored inside and outside the engine, causing pollution of adjacent components and causing engine failure due to oil ignition; 2) discharging the air leaked into the bearing cavity of the engine from each sealing device to ensure the effective sealing of each bearing cavity.

[0003] The conventional aircraft oil leakage discharge system generally adopts a discharge mode of collecting oil in a residual oil tank and then ejecting the oil outside the aircraft. When the aircraft is stationary or at a low speed, the engine oil leakage is collected in the residual oil tank. When the aircraft reaches a certain flight speed, the concentrated oil in the residual oil tank is ejected outside the aircraft through the ejection pipe or wing knife aerodynamic pressure difference arranged on the aircraft belly. However, with the increasing requirement of modern war on the stealth performance of the aircraft, the conventional ejection pipe or wing knife will destroy the current distribution and scattering characteristics of electromagnetic waves on the surface of the aircraft, thereby affecting the radar scattering cross section (RCS) value of the whole machine and reducing the radar stealth performance of the aircraft.

[0004] Therefore, how to maintain the radar stealth performance of the aircraft is a problem to be solved. CONTENT OF THE INVENTION

[0005] The application aims to provide a stealth aircraft engine oil leakage discharge device to solve the problem that the conventional ejection pipe or wing knife reduces the radar stealth performance of the aircraft.

[0006] The technical scheme of the application is: a stealth aircraft engine oil leakage discharge device, comprising a turbofan engine, an outer-canal main ejection pipe, a mixing pipe and a leakage discharge stealth grille; the turbofan engine is arranged in an engine cabin, and the turbofan engine is internally provided with an engine residual oil tank, an oil-gas separator, an outer-canal air inlet and an engine leakage discharge pipeline; the engine leakage discharge pipeline has two inlets and one outlet, the two inlets are connected with the engine residual oil tank and the oil-gas separator respectively, and the objects discharged from the engine residual oil tank and the oil-gas separator are mixed in the engine leakage discharge pipeline to form an oil-gas mixture; the outlet of the engine leakage discharge pipeline is connected with an inlet end of the mixing pipe; the mixing pipe is internally provided with a mixing chamber, and the mixing chamber is internally provided with a mixing rod; the mixing pipe is externally provided with a mixing pipe outlet; the mixing pipe outlet is connected with the leakage discharge stealth grille; the leakage discharge stealth grille is externally provided with a leakage discharge stealth grille outlet; the leakage discharge stealth grille outlet is connected with the outer-canal main ejection pipe; the outer-canal main ejection pipe is externally provided with an outer-canal main ejection pipe outlet; and the outer-canal main ejection pipe outlet is connected with the turbofan engine.

[0007] The one end of the outer channel main injection pipe is connected with the outer channel air inlet, and the other end is communicated with the inlet end of the mixing pipeline, and can introduce the injected air flow in the outer channel air inlet; the outlet end of the mixing pipeline is communicated with the leakage stealthy grid, and the leakage stealthy grid can discharge the air and oil gas mixture in the mixing pipeline to the outside of the engine cabin; the inner wall of the engine cabin is provided with an air inlet stealthy grid communicated with the outside.

[0008] Preferably, the engine leakage pipeline and the mixing pipeline have a fire-resistant compensation hose.

[0009] Preferably, the outer channel main injection pipe and the mixing pipeline are provided with an air inlet pipe, and the air inlet pipe can suck the injected air flow into the engine cabin.

[0010] Preferably, the air inlet pipe is a cone structure.

[0011] The stealthy aircraft engine oil leakage discharge device provided by the application, when the system is running, the external air enters the engine cabin as the injected air flow through the air inlet stealthy grid, the outer channel main injection pipe drives the air in the cabin to ventilate and cool the engine cabin by injecting the injected air flow, and on the other hand, the oil gas mixture of the engine oil tank and the oil gas separator is transported to the leakage stealthy grid, and then the oil gas mixture is discharged outside by the leakage stealthy grid. The engine cabin can be ventilated and cooled while the stealth performance of the aircraft is ensured, the damage of the engine leakage to the stealth performance of the aircraft is reduced, and the engine cabin can be ventilated and cooled; meanwhile, the structure is simple, and the engineering implementation is strong. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions provided by the application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the application.

[0013] Figure 1 It is a schematic diagram of the overall structure of the application.

[0014] 1, engine cabin; 2, turbofan engine; 3, engine oil tank; 4, oil gas separator; 5, outer channel air inlet; 6, outer channel main injection pipe; 7, air inlet stealthy grid; 8, mixing pipeline; 9, leakage stealthy grid; 10, engine leakage pipeline; 11, compensation hose; 12, air inlet pipe. DETAILED DESCRIPTION

[0015] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application.

[0016] A stealth aircraft engine oil leakage discharge device, as shown in Figure 1 The engine 2 is arranged in the engine cabin 1, and the engine 2 is internally provided with an engine oil tank 3, an oil-gas separator 4, an outer channel air inlet 5 and an engine leakage pipeline 10. The engine leakage pipeline 10 has two inlets and one outlet, the two inlets are respectively connected with the engine oil tank 3 and the oil-gas separator 4, and the objects discharged from the engine oil tank 3 and the oil-gas separator 4 are mixed in the engine leakage pipeline 10 to form an oil-gas mixture; and the outlet of the engine leakage pipeline 10 is connected with an inlet end of a mixing pipeline 8.

[0017] The outer channel main injection pipe 6 is connected with the outer channel air inlet 5 at one end and is in communication with the inlet end of the mixing pipeline 8 at the other end, so as to introduce the injected air flow in the outer channel air inlet 5, and the outlet end of the mixing pipeline 8 is in communication with a leakage stealth grid 9, and the leakage stealth grid 9 can discharge the air and the oil-gas mixture in the mixing pipeline 8 to the outside of the engine cabin 1. An air inlet stealth grid 7 is arranged on the inner wall of the engine cabin 1 and is in communication with the outside.

[0018] During system operation, the external air enters the engine cabin 1 as the injected air flow through the air inlet stealth grid 7, the outer channel main injection pipe 6 drives the air in the cabin to ventilate and cool the engine cabin 1 by injecting the injected air flow, and on the other hand, the oil-gas mixture of the engine oil tank 3 and the oil-gas separator 4 is transported to the leakage stealth grid 9 by injecting the oil-gas mixture, and then the oil-gas mixture is discharged to the outside of the engine cabin 1 by the leakage stealth grid 9.

[0019] The method can ventilate and cool the engine cabin 1 while ensuring the stealth performance of the aircraft, reduces the damage of the engine leakage to the stealth performance of the aircraft, and can ventilate and cool the engine cabin 1; and the structure is simple and has strong engineering implementability.

[0020] The length and diameter of the outer channel main injection pipe 6 are determined by the space of the engine cabin 1 and the flow and pressure of the outer channel air flow. The size requirements of the air inlet stealth grid 7 and the leakage stealth grid 9 should be able to meet the requirements of the stealth performance of the aircraft while ensuring sufficient fluid flow.

[0021] Preferably, the engine bleed line 10 and the mixing duct 8 are connected by a fire resistant compensating hose 11, which compensates for engine vibrations, thermal expansion, relative displacement of the installation of the bleed air, and which ensures sufficient fluid flow while meeting the aircraft stealth requirements.

[0022] Preferably, the outer bypass main ejector duct 6 and the mixing duct 8 are connected by an air intake duct 12, which is able to draw in the air flow being ejected into the engine compartment 1.

[0023] Preferably, the air intake duct 12 is of a conical shape, in order to ensure sufficient air intake speed.

[0024] Finally, it should be noted that the drawings of the disclosed embodiments only relate to the structures involved in the disclosed embodiments, and other structures can be referred to the usual design, and in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0025] Finally, the above only refers to the preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A stealth aircraft engine oil leak exhaust apparatus, characterized by: The turbofan engine (2), the outer-cant main injection pipe (6), the mixing pipe (8) and the leakage discharge stealth grid (9); the turbofan engine (2) is arranged in the engine cabin (1), the turbofan engine (2) is internally provided with an engine oil tank (3), an oil-gas separator (4), an outer-cant air injection port (5) and an engine leakage discharge pipeline (10); the engine leakage discharge pipeline (10) has two inlets and an outlet, wherein the two inlets are connected with the engine oil tank (3) and the oil-gas separator (4) respectively, and the objects discharged by the engine oil tank (3) and the oil-gas separator (4) are mixed in the engine leakage discharge pipeline (10) to form an oil-gas mixture; the outlet of the engine leakage discharge pipeline (10) is connected with the inlet end of the mixing pipe (8); The outer-cant main injection pipe (6) is connected with the outer-cant air injection port (5) at one end and is in communication with the inlet end of the mixing pipe (8) at the other end, and can introduce the injected air flow in the outer-cant air injection port (5); the outlet end of the mixing pipe (8) is in communication with the leakage discharge stealth grid (9), and the leakage discharge stealth grid (9) can discharge the air and the oil-gas mixture in the mixing pipe (8) to the outside of the engine cabin (1); the inner wall of the engine cabin (1) is provided with an air inlet stealth grid (7) in communication with the outside.

2. The stealth aircraft engine oil leak exhaust apparatus of claim 1, wherein: The engine leakage discharge pipeline (10) and the mixing pipe (8) are provided with a fire-resistant compensation hose (11).

3. The stealth aircraft engine oil leak exhaust apparatus of claim 1, wherein: The outer-cant main injection pipe (6) and the mixing pipe (8) are provided with an air inlet pipe (12), and the air inlet pipe (12) can suck the injected air flow into the engine cabin (1).

4. The stealth aircraft engine oil leak exhaust apparatus of claim 3, wherein: The air inlet pipe (12) is a cone structure.

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