CN111706878A - Double oil circuit hedging direct injection nozzle - Google Patents

Abstract

The invention provides a dual-oil-path counter-injection nozzle, which relates to the field of gas turbine combustion chambers. A first rotating bearing is arranged on the first rotating bearing, a rotating shaft is arranged on the first rotating bearing, and a plurality of stirring rods are arranged on the rotating shaft. , A drive motor is installed on the outside of the outlet bracket. The nozzle in the present invention has dual oil paths, so that the fuel is collided and broken, and the fuel can be crushed twice by the setting of the stirring rod. Secondary crushing, the whole invention is simple in structure and thoughtful in thinking, which can make the fuel and air completely mix, and the fuel space is evenly distributed, the atomization effect is good, and the practicability is high.

Description

Double oil circuit hedging direct injection nozzle

technical field

The invention relates to the field of gas turbine combustion chambers, in particular to a dual-oil path counteracting direct injection nozzle.

Background technique

The basic performance and structural distribution of modern aero-engine combustion chambers have reached a fairly high level, but for modern aero-engine combustion chambers, there are still a lot of problems and challenges, so there is still room for improvement in structural design and performance , such as the development and application of new materials, new processes, new structures, and new concepts, which are the source of ensuring the continuous progress of its technology.

In order to improve the performance of the aero-engine combustion chamber, the internal fuel atomization effect is an important part. The quality of the fuel atomization effect determines the working characteristics of the combustion chamber. It is necessary to make the fuel and air completely mix, and the fuel space distribution Therefore, the study of fuel atomization is a very important part in the study of aero-engine combustion chamber.

The patent number is CN201910153702.6 dual oil circuit hedging direct injection nozzle, the overall form of the injection nozzle is a direct injection nozzle, through upstream pressure, the fuel is transported into the injection nozzle, the injection nozzle has a central oil circuit and an outer ring oil circuit. At the end of the straight section of the jet nozzle and the expansion section, the fuel in the outer ring oil circuit will enter the central oil circuit in the reverse direction, and the two fuels will collide and be broken. The invention simply breaks the fuel through the collision of the fuel between the central oil circuit and the outer ring oil circuit. This method is too simple and the fuel atomization effect is not good.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dual-oil hedging direct injection nozzle to solve the above-mentioned technical problems.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme to realize: a double-oil hedging direct injection nozzle, including a central oil passage and an outer oil passage, the outer wall of the central oil passage is arranged on the outer side of the central oil passage, and the outer oil passage is provided with an outer wall of the central oil passage. The outer wall of the outer oil circuit is provided on the outside of the road. The end of the outer oil circuit is a closed structure, and the outer wall of the central oil circuit is provided with an inclined injection hole and a rectangular inlet near the end of the outer oil circuit. The outer wall of the outer oil circuit An expansion jet nozzle is arranged at the end of the expansion jet, and the inner side wall of the expansion jet nozzle is tightly welded with the outer wall of the central oil passage. The opening position of the central oil passage is provided with a support frame, and the center position of the support frame is provided with a first rotating bearing. The rotating bearing is provided with a rotating shaft along the central axis, and a plurality of stirring rods are arranged in the same plane along the central axis on the rotating shaft, and the outer sides of all stirring rods are connected and fixed by a fixing ring, and the rotating shaft is located in the stirring rod. An isolation net is provided on one side of the nozzle, the end of the expanding jet nozzle is fixedly provided with an outlet bracket, the inner center of the outlet bracket is provided with a second rotating bearing, and the right end of the rotating shaft is installed on the second rotating bearing. A drive motor is installed on the outer side of the bracket, and the output end of the drive motor is drivingly connected with the input end of the rotating shaft, and a sealing cover is provided on the outer side of the second rotating bearing and the drive motor.

Preferably, the outer wall of the central oil passage is a cylindrical cylinder structure.

Preferably, there are eight stirring rods in total, and they are distributed in an annular array along the axis of the rotating shaft.

Preferably, a ventilation pipe is arranged inside the stirring rod, a plurality of jet nozzles are evenly arranged on the outer side wall of the stirring rod, a one-way valve is installed on the jet nozzle, and an air delivery pipe is provided inside the rotating shaft, The ventilation pipeline is movably connected with the gas delivery pipe, and the gas delivery pipe is connected with an air pump.

Preferably, the expanding angle of the expanding jet nozzle is 8-10°.

Preferably, the gas delivery pipe is movably connected with the rotating shaft.

Preferably, the inner radius of the central oil passage is 2-5 mm, the outer oil passage is concentric with the central oil passage, and the distance between the inner wall of the outer oil passage and the outer wall of the central oil passage is 0.5-1 mm.

Preferably, an inclined baffle is provided on the inner wall of the expanding jet nozzle toward the outlet bracket.

The beneficial effects of the present invention are:

The jet nozzle in the present invention has dual oil circuits, including a central oil circuit and an outer oil circuit. In the expansion section, the outer ring fuel enters the central oil circuit in reverse, and the fuel is collided and broken, which can effectively improve the fuel atomization effect. The arrangement of the hole and the rectangular inlet makes the fuel entering the central oil circuit from the outer oil circuit collide with the fuel in the central oil circuit. Driven by the shaft, it rotates rapidly, and the fuel is crushed for the third time, so that the fuel can be atomized to the greatest extent, and the performance of the combustion chamber of the engine is obviously improved. And the fuel space is evenly distributed, the atomization effect is good, and the practicability is high.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the dual-oil hedging direct injection nozzle of the present invention;

FIG. 2 is a schematic cross-sectional view of the central axis of the dual-oil hedging direct injection nozzle of the present invention;

3 is a schematic diagram of the three-dimensional structure of the isolation net of the present invention;

4 is a schematic front view of a stirring rod of the present invention;

Fig. 5 is the enlarged schematic diagram of part A in Fig. 4 of the present invention;

Reference numerals: 1. Central oil circuit; 2. Outer oil circuit; 3. Outer wall of central oil circuit; 4. Outer wall of outer oil circuit; 5. Inclined injection hole; 6. Rectangular inlet; Support frame; 9. The first rotating bearing; 10. The rotating shaft; 11. The stirring rod; 12. The fixing ring; 13. The isolation net; 14. The outlet bracket; 15. The second rotating bearing; hood; 18, ventilation pipe; 19, jet nozzle; 20, one-way valve; 21, gas pipe; 22, inclined baffle.

Detailed ways

In order to make the technical means, creative features, goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to specific embodiments and accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all of them. . Based on the examples in the implementation manner, other examples obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1

As shown in Figure 1-3, the dual-oil hedging direct injection nozzle includes a central oil passage 1 and an outer oil passage 2. An outer wall 3 of the central oil passage is arranged on the outer side of the central oil passage 1, and an outer wall 3 is arranged on the outer side of the outer oil passage 2. The outer wall 4 of the oil passage, the end of the outer oil passage 2 is a closed structure, and the outer wall 3 of the central oil passage is provided with an inclined injection hole 5 and a rectangular inlet 6 near the end of the outer oil passage 2, and the end of the outer wall 4 of the outer oil passage is provided with expansion. Air jet nozzle 7, and the inner side wall of expanding jet nozzle 7 is tightly welded with the outer wall 3 of the central oil passage, the opening position of the central oil passage 1 is provided with a support frame 8, and the central position of the support frame 8 is provided with a first rotating bearing 9, the first The rotating bearing 9 is provided with a rotating shaft 10 along the central axis. The rotating shaft 10 is provided with a plurality of stirring rods 11 in the same plane along the central axis, and the outer sides of all stirring rods 11 are connected and fixed by the fixing ring 12, and the rotation The shaft 10 is provided with an isolation net 13 on one side of the stirring rod 11, the end of the expansion jet nozzle 7 is fixedly provided with an outlet bracket 14, the inner center position of the outlet bracket 14 is provided with a second rotating bearing 15, and the right end of the rotating shaft 10 is installed on the The second rotating bearing 15 has a drive motor 16 installed on the outside of the outlet bracket 14, and the output end of the drive motor 16 is drivingly connected to the input end of the rotating shaft 10. The outside of the second rotating bearing 15 and the drive motor 16 is provided with a sealing cover 17.

Working principle: After the fuel is pressurized, it is divided into two parts at the inlet of the jet nozzle and enters the jet nozzle, including the central oil circuit 1 and the outer oil circuit 2. The fuel in the outer oil circuit 2 will be inclined along the slope due to the closed oil circuit. The injection hole 5 and the rectangular inlet 6 are injected obliquely into the central oil circuit 1. When the fuel is injected into the central oil circuit 1, the collision of the two fuels will cause the initial fragmentation of the fuel, and then the fuel enters the expansion jet nozzle 7 section, which drives the motor 16. Work, drive the rotating shaft 10 to rotate rapidly, the stirring rod 11 will crush the fuel entering the expanding jet nozzle 7 in the second step, and then the fuel will pass through the isolation net 13, and the isolation net 13 will be driven by the rotating shaft 10. The third step of crushing will make the fuel surface fluctuate more violently. After the action of the outlet bracket 14, the fuel injected by the jet nozzle will hardly appear liquid column, but will be directly broken into small droplets, thereby shortening the injection distance and making the fuel Atomization, evaporation effect is significantly improved.

Example 2

As shown in Figure 1-5, the dual-oil hedging direct injection nozzle includes a central oil passage 1 and an outer oil passage 2. The outer wall of the central oil passage 3 is arranged on the outside of the central oil passage 1, and the outer wall of the outer oil passage 2 is arranged on the outer side. The outer wall 4 of the oil passage, the end of the outer oil passage 2 is a closed structure, and the outer wall 3 of the central oil passage is provided with an inclined injection hole 5 and a rectangular inlet 6 near the end of the outer oil passage 2, and the end of the outer wall 4 of the outer oil passage is provided with expansion. Air jet nozzle 7, and the inner side wall of expanding jet nozzle 7 is tightly welded with the outer wall 3 of the central oil passage, the opening position of the central oil passage 1 is provided with a support frame 8, and the central position of the support frame 8 is provided with a first rotating bearing 9, the first The rotating bearing 9 is provided with a rotating shaft 10 along the central axis. The rotating shaft 10 is provided with a plurality of stirring rods 11 in the same plane along the central axis, and the outer sides of all stirring rods 11 are connected and fixed by the fixing ring 12, and the rotation The shaft 10 is provided with an isolation net 13 on one side of the stirring rod 11, the end of the expansion jet nozzle 7 is fixedly provided with an outlet bracket 14, the inner center position of the outlet bracket 14 is provided with a second rotating bearing 15, and the right end of the rotating shaft 10 is installed on the The second rotating bearing 15 has a drive motor 16 installed on the outside of the outlet bracket 14, and the output end of the drive motor 16 is drivingly connected to the input end of the rotating shaft 10. The outside of the second rotating bearing 15 and the drive motor 16 is provided with a sealing cover 17.

The inside of the stirring rod 11 is provided with a ventilation pipe 18, the outer side wall of the stirring rod 11 is evenly provided with a plurality of jet nozzles 19, the jet nozzle 19 is provided with a one-way valve 20, and the interior of the rotating shaft 10 is provided with an air delivery pipe 21, ventilation. The pipeline 18 is movably connected with the gas delivery pipe 21 , and an air pump is connected to the gas delivery pipe 21 .

Working principle: When the fuel is crushed in the second step, the rotating shaft 10 drives the stirring rod 11 to rotate rapidly, thereby crushing the fuel, and at the same time, the air pump is turned on, and the gas in the air pump will reach the inner cavity of the rotating shaft 10 along the gas pipeline 21. into the body, then reach the interior of the ventilation duct 18, and finally spray along the jet nozzle 19, and the jetted air flow is fast, directly impacting the fuel, making the fuel crushing effect better, with the setting of the one-way valve 20, So that only the air flow can be ejected from the jet nozzle 19 , and the fuel cannot enter the ventilation duct 18 .

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention, without departing from the spirit and scope of the present invention. Under the premise, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. Two oil circuit offset direct injection formula nozzles, including central oil circuit (1) and outer oil circuit (2), its characterized in that:

a central oil way outer wall (3) is arranged on the outer side of the central oil way (1), an outer oil way outer wall (4) is arranged on the outer side of the outer oil way (2), the tail end of the outer oil way (2) is of a closed structure, an inclined injection hole (5) and a rectangular inlet (6) are arranged at the position, close to the tail end of the outer oil way (2), of the central oil way outer wall (3), an expansion nozzle (7) is arranged at the tail end of the outer oil way outer wall (4), the inner side wall of the expansion nozzle (7) is tightly welded with the central oil way outer wall (3), a support frame (8) is arranged at the opening position of the central oil way (1), a first rotating bearing (9) is arranged at the central position of the support frame (8), a rotating shaft (10) is arranged on the first rotating bearing (9) along the central axis, and a plurality of stirring rods (11, and the outside of all puddlers (11) is connected fixedly through solid fixed ring (12), one side that axis of rotation (10) is located puddler (11) is provided with isolated net (13), the fixed exit bracket (14) that is provided with in end of expansion nozzle (7), the inboard central point of exit bracket (14) puts and is provided with second rolling bearing (15), and axis of rotation (10) right-hand member installs at second rolling bearing (15), driving motor (16) are installed in the outside of exit bracket (14), and the output of driving motor (16) is connected with the input transmission of axis of rotation (10), the outside of second rolling bearing (15) and driving motor (16) all is provided with sealed cowling (17).

2. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: the outer wall (3) of the central oil way is of a cylindrical barrel structure.

3. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: eight stirring rods (11) are arranged and distributed in an annular array along the axis of the rotating shaft (10).

4. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: the utility model discloses a stirring shaft, including puddler (11), the inside of puddler (11) is provided with breather pipe (18), evenly be provided with a plurality of air injection nozzle (19) on the lateral wall of puddler (11), install check valve (20) on air injection nozzle (19), the inside of axis of rotation (10) is provided with gas-supply pipe (21), breather pipe (18) and gas-supply pipe (21) swing joint, and be connected with the air pump on gas-supply pipe (21).

5. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: the expansion angle of the expansion nozzle (7) is 8-10 degrees.

6. The dual oil path opposed jet direct injection nozzle of claim 4, wherein: the gas pipe (21) is movably connected with the rotating shaft (10).

7. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: the inner radius of the central oil way (1) is 2-5 mm, the outer oil way (2) is concentric with the central oil way (1), and the distance between the inner wall of the outer oil way (2) and the outer wall of the central oil way (1) is 0.5-1 mm.

8. The dual oil path opposed jet direct injection nozzle of claim 1, wherein: an inclined baffle (22) is arranged on the inner wall of the expansion nozzle (7) towards the outlet support (14).

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