An oil injection rod and stabilizer integrated structure

Abstract

The application discloses an oil injection rod and stabilizer integrated structure, which comprises a radial stabilizer, a circumferential stabilizer arranged on the radial stabilizer, a mounting seat arranged at a side end of the circumferential stabilizer, an I-way oil injection rod mounting seat, a II-way oil injection rod and a III-way oil injection rod arranged on the mounting seat, a plug and a plug arranged at a bottom end of the radial stabilizer, wherein the oil injection rod and stabilizer integrated structure is a multi-cavity and multi-hole complex hollow structure, and is provided with evaporation cavities, cooling cavities and fuel flow path cavities, and is provided with a plurality of oil injection holes, cooling holes and evaporation holes. The plug, the plug and the II-way oil injection rod and the III-way oil injection rod are connected through welding, and closed oil path cavities are formed in the inner cavities of the II-way oil injection rod and the III-way oil injection rod; the structure integrates multiple functions such as oil supply, combustion organization, on-duty flame, cooling and anti-spontaneous combustion of fuel oil, has multiple functions, and can work at a total temperature of 1450K in a thrust chamber and at a working temperature lower than 1300K, and is reliable in work.

Description

Technical Field

[0001] This invention belongs to the field of afterburner technology for aero-engines, specifically relating to an integrated structure of fuel injector and stabilizer. Background Technology

[0002] The stabilizer assembly is a core component of the afterburner, integrating the essential functional structures for afterburner fuel supply and combustion organization. Its main function is to ensure fuel supply and combustion organization in all areas of the afterburner. The rationality of the fuel supply assembly and stabilizer structure design directly determines the performance and operational stability of the afterburner, and consequently, the performance of the afterburner. Therefore, the design of the stabilizer assembly is a core task in the afterburner design process and a focus of research.

[0003] With the development of aero-engine technology, higher requirements are being placed on both overall performance and economy. This has led to increasingly higher operating temperatures and more compact structures in afterburners, necessitating comprehensive consideration of cooling, multi-functional integration, and other factors, resulting in significant design challenges. Traditional stabilizer assemblies, with their independent fuel injector rods and stabilizers and relatively large spacing between them, are prone to premature fuel combustion and stabilizer ablation when used in next-generation afterburners. Especially for variable cycle engines, the high inlet temperature and large fluctuations in internal and external airflow parameters within the afterburner pose significant challenges to the integrated design of the injector and stabilizer. It is necessary to address the issue of ensuring the integrated component's cooling design remains effective despite significant aerodynamic parameter variations, preventing the component's operating temperature from exceeding its limit. Furthermore, it is crucial to ensure proper matching between the injector's injection point and the stabilizer's backflow zone to prevent fuel combustion from being affected by large aerodynamic parameter changes, thus avoiding fuel auto-ignition and stabilizer ablation. Therefore, based on the operational requirements of variable cycle engine afterburners, a multi-functional integrated injector and stabilizer structure is proposed, incorporating functions such as fuel supply, combustion organization, standby flame control, cooling, and fuel auto-ignition prevention. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide an integrated structure for the fuel injector and stabilizer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an integrated structure of a fuel injector and a stabilizer, comprising a radial stabilizer, a circumferential stabilizer disposed on the radial stabilizer, a mounting base disposed on the side end of the circumferential stabilizer, a fuel injector mounting base for a first-path fuel injector, a second-path fuel injector, and a third-path fuel injector disposed on the mounting base, and a plug and a stopper disposed at the bottom end of the radial stabilizer.

[0006] The integrated structure of the fuel injector and stabilizer is a complex hollow structure with multiple cavities and holes, including an evaporation cavity, a cooling cavity, and a fuel flow path cavity, as well as several fuel injection holes, cooling holes, and evaporation holes.

[0007] The plug is connected to the second-path fuel injector and the third-path fuel injector by welding, forming a closed oil passage cavity in the inner cavity of the second-path fuel injector and the third-path fuel injector.

[0008] The circumferential stabilizer and the radial stabilizer are provided with circumferential evaporation chambers and radial evaporation chambers, and are provided with a number of evenly distributed evaporation holes with a diameter of 2-3 mm.

[0009] The circumferential evaporation chamber has two evaporation chamber air inlets, and the ratio of the flow area of ​​the evaporation holes to the flow area of ​​the evaporation chamber air inlets is 0.4.

[0010] The second-stage and third-stage fuel injector rods are provided with several fuel injection holes.

[0011] A cooling chamber is provided at the contact point between the stabilizer and the fuel injector. The air inlet of the cooling chamber is located at the lower end of the mounting base, drawing low-temperature air from the outside to cool the fuel injector and stabilizer. The operating temperature is below 1300K under a total internal temperature of 1450K in the afterburner.

[0012] Three fixing points are evenly arranged from top to bottom in the vertical direction of the fuel injector rod, which are integrated with the stabilizer.

[0013] The mounting base has threaded holes.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This integrated structure is a complex, multi-cavity, multi-pore hollow structure that integrates multiple functions such as fuel supply, combustion organization, standby flame, cooling, and prevention of fuel auto-ignition. It is equipped with an evaporation chamber, a cooling chamber, and a fuel flow path chamber, and has several injection holes, cooling holes, and evaporation holes, which allows it to operate at a temperature below 1300K with a total internal temperature of 1450K in the afterburner, ensuring reliable operation.

[0016] 2. This structure has two evaporator chamber air inlets and one cooling chamber air inlet. The evaporator chamber air inlets introduce the mixture of the inner and outer bypass fuel and the standby fuel, which is then fully mixed and enters the circumferential and radial evaporator chambers respectively. The cooling chamber air inlet introduces low-temperature air into the cooling chamber, which flows out from the gap between the fuel injection hole and the stabilizer cooling hole. Its functions are as follows: first, to form an air film around the fuel to prevent fuel auto-ignition; second, to remove excess heat from the stabilizer and fuel injection rod, reducing the operating temperature; and third, to introduce clean air from the outer bypass into the inner bypass, increasing the oxygen in the inner bypass area and improving combustion efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an isometric view of the integrated structure of the fuel injector and stabilizer in this invention;

[0019] Figure 2 This is a right view of the integrated structure of the fuel injector and stabilizer in this invention;

[0020] Figure 3 yes Figure 2 Sectional view of AA;

[0021] Figure 4 This is a left view of the integrated structure of the fuel injector and stabilizer in this invention;

[0022] Figure 5 yes Figure 4 Sectional view of BB;

[0023] Figure 6 This is a partially enlarged schematic diagram of the fuel injection hole in the integrated injector / stabilizer structure;

[0024] Figure 7 This is a partially enlarged schematic diagram of the evaporation chamber of the integrated spray / stabilizer structure;

[0025] Among them, 1-radial stabilizer; 2-first plug; 3-second plug; 4-II-way fuel injector; 5-III-way fuel injector; 6-I-way fuel injector mounting base; 7-circumferential stabilizer; 8-mounting base; 9-fuel injection hole; 10-evaporation hole. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. All modifications, substitutions and alterations made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0027] Reference Figures 1-3An integrated structure of fuel injector and stabilizer includes a radial stabilizer 1, a first plug 2, a second plug 3, a second-path fuel injector 4, a third-path fuel injector 5, a first-path nozzle mounting base 6, a circumferential stabilizer 7, and a mounting base 8. The radial stabilizer 1, second-path fuel injector 4, third-path fuel injector 5, first-path fuel injector mounting base 6, circumferential stabilizer 7, and mounting base 8 are integrated. The radial stabilizer 1 and circumferential stabilizer 7 are used for on-duty flame stabilization, the second-path fuel injector 4 and third-path fuel injector 5 are used for fuel replenishment in the afterburner, and the first-path fuel injector mounting base 6 is used to mount the first-path fuel injector. (See reference...) Figure 3 The first plug 2 and the second plug 3 are connected to the second-path fuel injector 4 and the third-path fuel injector 5 by welding, forming a closed fuel circuit cavity in the inner cavity of the second-path fuel injector 4 and the third-path fuel injector 5.

[0028] Reference Figure 3 , Figure 4 , Figure 5 and Figure 7 The integrated structure of the fuel injector and stabilizer has two 40mm×20mm evaporator chamber air inlets. The air-fuel mixture from the inner and outer bypass is fully mixed with the standby fuel and then enters the circumferential evaporator chamber and the radial evaporator chamber respectively. Finally, it flows out from the evaporator hole and enters the stabilizer backflow zone for stable combustion.

[0029] Reference Figure 3 and Figure 6 The integrated structure of the fuel injector and stabilizer features a 65mm×20mm cooling chamber air inlet, introducing low-temperature air into the cooling chamber and flowing out from the gap between the fuel injector and the stabilizer cooling hole. Its functions are: first, to form an air film around the fuel to prevent fuel auto-ignition; second, to remove excess heat from the stabilizer and fuel injector, reducing the operating temperature; and third, to introduce clean air from the outside into the inside, increasing oxygen in the inside area and improving combustion efficiency.

[0030] The circumferential and radial evaporation chambers of the integrated structure of the fuel injector and stabilizer are provided with several evenly distributed evaporation holes 10 with a diameter of 2-3 mm. Considering the penetration depth of the fuel in the backflow zone, the ratio of the flow area of ​​the evaporation hole 10 to the flow area of ​​the air inlet of the evaporation chamber is preferably 0.4. The second-path fuel injector 4 and the third-path fuel injector 5 are provided with several fuel injection holes 9. According to the fuel supply requirements within the envelope, the second-path fuel injector 4 is provided with 2 fuel injection holes 9 with a diameter of 0.8 mm and 6 fuel injection holes 9 with a diameter of 0.6 mm, and the third-path fuel injector 5 is provided with 7 fuel injection holes 9 with a diameter of 0.8 mm and 11 fuel injection holes 9 with a diameter of 0.7 mm.

[0031] To control the thermal deformation of the fuel injector, three fixing points are evenly arranged from top to bottom in the vertical direction of the fuel injector, which are integrated with the stabilizer. Six M6 threaded holes are provided on the mounting base 8 for installation, which can ensure installation reliability and disassembly.

[0032] The integrated structure of the fuel injector and stabilizer is a complex, multi-cavity, multi-hole hollow structure. The multi-cavity refers to the evaporation chamber, cooling chamber, and fuel flow path chamber, while the multi-hole refers to several injection holes 9, cooling holes, and evaporation holes 10. It integrates multiple functions, including fuel supply, combustion organization, standby flame, cooling, and prevention of fuel auto-ignition. The cooling chamber draws in low-temperature air from outside to cool the fuel injector and stabilizer, maintaining an operating temperature below 1300K within the afterburner chamber's total internal temperature of 1450K. The evaporation chamber serves two main functions: acting as a standby flame when ignition is required, and acting as a cooling function when ignition is not needed.

[0033] The above provides a detailed description of the integrated structure of the fuel injector and stabilizer provided by the present invention. Specific examples have been used to illustrate the structure and working principle of the invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principle of the invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An integrated structure of fuel injector and stabilizer, characterized in that: Includes a radial stabilizer (1), a circumferential stabilizer (7) set on the radial stabilizer (1), a mounting base (8) set on the side end of the circumferential stabilizer (7), a first-way fuel injector mounting base (6), a second-way fuel injector (4) and a third-way fuel injector (5) set on the mounting base (8), and a first plug (2) and a second plug (3) set at the bottom end of the radial stabilizer (1); The integrated structure of the fuel injector and stabilizer is a complex hollow structure with multiple cavities and holes. It has an evaporation cavity, a cooling cavity and a fuel flow path cavity, and several fuel injection holes (9), cooling holes and evaporation holes (10). Three fixing points are evenly arranged from top to bottom in the vertical direction of the fuel injector and are integrated with the stabilizer. The cooling chamber is located at the contact point between the stabilizer and the fuel injector. The air inlet of the cooling chamber is located at the lower end of the mounting base (8). The low-temperature cooling airflow introduced from the air inlet of the cooling chamber can flow out from the gap between the fuel injector hole (9) of the fuel injector and the cooling hole on the stabilizer, thereby forming a gas film around the fuel to prevent fuel from spontaneous combustion. The working temperature is below 1300K under a total internal temperature of 1450K in the afterburner. The first plug (2) and the second plug (3) are connected to the II-way fuel injector (4) and the III-way fuel injector (5) by welding, forming a closed oil circuit cavity in the inner cavity of the II-way fuel injector (4) and the III-way fuel injector (5). Several fuel injection holes (9) are opened on the II-way fuel injector (4) and the III-way fuel injector (5). The circumferential stabilizer (7) and the radial stabilizer (1) are provided with circumferential evaporation cavity and radial evaporation cavity, and several evenly distributed evaporation holes (10) with a diameter of 2-3 mm are opened on them. Two evaporation cavity air inlets are opened on the circumferential evaporation cavity. The evaporation cavity air inlets introduce the inner and outer bypass mixture and the duty fuel, and then enter the circumferential evaporation cavity and the radial evaporation cavity respectively.

2. The integrated structure of the fuel injector and stabilizer according to claim 1, characterized in that: The ratio of the flow area of ​​the evaporation hole (10) to the flow area of ​​the air inlet of the evaporation chamber is 0.

4.

3. The integrated structure of the fuel injector and stabilizer according to claim 1, characterized in that: A threaded hole is provided on the mounting base (8).

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