A single-oil-circuit dual-fuel-supply combined atomization device

Abstract

The present invention discloses a combined atomization device with a single oil circuit and dual fuel supply modes, which includes a main combustion stage oil pipe, a pre-combustion stage oil pipe, a centrifugal pressure nozzle, a main combustion stage oil circuit switch conversion mechanism, a pre-combustion stage oil circuit switch conversion mechanism, and a direct injection nozzle. The top end of the main combustion stage oil pipe is integrally connected to the fuel supply pipe, and the bottom end of the main combustion stage oil pipe is connected to the wall surface of the centrifugal pressure nozzle. The pre-combustion stage oil pipe is sleeved inside the main combustion stage oil pipe, and the bottom end of the pre-combustion stage oil pipe is connected to the inlet of the centrifugal pressure nozzle. An annular main combustion stage oil circuit is formed between the main combustion stage oil pipe and the pre-combustion stage oil pipe, and a pre-combustion stage oil circuit is formed inside the pre-combustion stage oil pipe. The main combustion stage oil circuit switch conversion mechanism is installed at the top end of the main combustion stage oil circuit; the pre-combustion stage oil circuit switch conversion mechanism is installed at the top end of the pre-combustion stage oil circuit; the direct injection nozzle is installed on the pipe wall of the main combustion stage oil pipe and is communicated with the main combustion stage oil circuit. The present invention can realize the conversion of two fuel atomization modes in the afterburner, and achieve ignition and stable combustion in the afterburner.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel atomization devices, and more particularly to a combined atomization device with a single oil circuit and a dual fuel supply method. Background Art

[0002] As a main component of the main combustion chamber and afterburner of an aeroengine, the fuel atomization device is used to atomize aviation fuel, and after being fully mixed with the combustion improver, it is ignited and burned. Therefore, the quality of fuel atomization will directly affect the combustion performance of the combustion chamber, and further affect the thrust, flight performance, and service life of the aeroengine, etc.

[0003] At present, the centrifugal pressure nozzle is mainly used as the fuel supply method for the main combustion chamber of the aeroengine, and the direct injection nozzle is used as the fuel supply method for the afterburner of the aeroengine. Although a single direct injection nozzle can meet the combustion requirements of the afterburner, there are great deficiencies in the ignition of the afterburner, and the ignition is difficult.

[0004] Therefore, it is an urgent problem for those skilled in the art to provide a combined atomization device with a single oil circuit and a dual fuel supply method that can achieve ignition and stable combustion in the afterburner. Summary of the Invention

[0005] In view of this, the present invention provides a combined atomization device with a single oil circuit and a dual fuel supply method, which can realize the conversion of two fuel atomization methods in the afterburner without adding fuel pipelines, fuel flow distribution systems, hydraulic control systems, etc., and further realize the ignition and stable combustion of the afterburner.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A combined atomization device with a single oil circuit and a dual fuel supply method includes an oil supply pipe. The top end of the oil supply pipe is connected and communicated with an oil supply tank to form a total oil circuit inside the oil supply pipe. It also includes a main combustion stage oil pipe, a pre-combustion stage oil pipe, a centrifugal pressure nozzle, a main combustion stage oil circuit switch conversion mechanism, a pre-combustion stage oil circuit switch conversion mechanism, and a direct injection nozzle. The top end of the main combustion stage oil pipe is integrally connected with the oil supply pipe, and the bottom end of the main combustion stage oil pipe is connected to the wall surface of the centrifugal pressure nozzle; the pre-combustion stage oil pipe is sleeved inside the main combustion stage oil pipe, and the bottom end of the pre-combustion stage oil pipe is connected to the inlet of the centrifugal pressure nozzle, so as to form an annular main combustion stage oil circuit between the main combustion stage oil pipe and the pre-combustion stage oil pipe, and form a pre-combustion stage oil circuit inside the pre-combustion stage oil pipe; the main combustion stage oil circuit switch conversion mechanism is installed at the top end of the main combustion stage oil circuit; the pre-combustion stage oil circuit switch conversion mechanism is installed at the top end of the pre-combustion stage oil circuit; the direct injection nozzle is installed on the pipe wall of the main combustion stage oil pipe and is communicated with the main combustion stage oil circuit.

[0008] By adopting the above technical solutions, the beneficial effects of the present invention are as follows:

[0009] The present invention combines a centrifugal pressure nozzle and a direct injection nozzle, and internally adds a pre-combustion stage oil pipe on the basis of the main combustion stage oil pipe. The pre-combustion stage oil path formed inside the pre-combustion stage oil pipe is used to supply oil to the centrifugal pressure nozzle, and the main combustion stage oil path formed between the main combustion stage oil pipe and the pre-combustion stage oil pipe is used to supply oil to the direct injection nozzle. By changing the oil supply pressure of the fuel tank, the pressure upstream of the main combustion stage oil path switch conversion mechanism and the pre-combustion stage oil path switch conversion mechanism is changed, and a pressure difference is formed between the upstream and downstream of the main combustion stage oil path switch conversion mechanism and the pre-combustion stage oil path switch conversion mechanism, so as to open or close the main combustion stage oil path switch conversion mechanism and the pre-combustion stage oil path switch conversion mechanism, and further control the on-off of the main combustion stage oil path and the pre-combustion stage oil path, and realize the conversion of two fuel atomization methods.

[0010] Further, the main combustion stage oil path switch conversion mechanism includes a main combustion stage oil path rotating seat, a main combustion stage oil path rotating body, a main combustion stage oil path baffle, and a main combustion stage oil path elastic element. The main combustion stage oil path rotating seat is recessed and fixed on the inner wall of the main combustion stage oil pipe; the main combustion stage oil path rotating body is rotatably connected to the main combustion stage oil path rotating seat; the main combustion stage oil path baffle is integrally connected to the main combustion stage oil path rotating body; one end of the main combustion stage oil path elastic element is fixed on the inner wall of the main combustion stage oil pipe, and the other end of the main combustion stage oil path elastic element is fixed on the bottom wall of the main combustion stage oil path baffle.

[0011] Further, the main combustion stage oil path baffle is composed of n1 fan rings with the same shape, and the angle of each fan ring is 2π / n1; the number of the main combustion stage oil path elastic elements is an integer multiple of the number of the fan rings.

[0012] Further, the number of the fan rings n1 = 6 - 8; the number of the main combustion stage oil path elastic elements is the same as the number of the fan rings.

[0013] Further, the main combustion stage oil path rotating body is composed of n1 first solid spherical rings with a diameter d1 and an angle 2π / n1. Each first solid spherical ring is integrally connected to the corresponding fan ring through a pillar. The diameter d1 of the first solid spherical ring is less than 1 / 2 of the wall thickness of the fuel supply pipe; the shape of the main combustion stage oil path rotating seat is the same as the shape formed by the volume swept by the first solid spherical ring rotating 90°, and the rotation space formed inside the main combustion stage oil path rotating seat is not greater than L = D1 / 2*(1 - cosπ / n1).

[0014] Further, the pre-combustion stage oil circuit switch conversion mechanism includes a pre-combustion stage oil circuit rotating base, a pre-combustion stage oil circuit rotating body, a pre-combustion stage oil circuit baffle, and a pre-combustion stage oil circuit elastic element. The pre-combustion stage oil circuit rotating base is recessed and fixed on the inner wall of the pre-combustion stage oil pipe; the pre-combustion stage oil circuit rotating body is rotatably connected to the pre-combustion stage oil circuit rotating base; the pre-combustion stage oil circuit baffle is integrally connected to the pre-combustion stage oil circuit rotating body; one end of the pre-combustion stage oil circuit elastic element is fixed on the inner wall of the pre-combustion stage oil pipe, and the other end of the pre-combustion stage oil circuit elastic element is fixed on the top wall of the pre-combustion stage oil circuit baffle.

[0015] Further, the pre-combustion stage oil circuit baffle is composed of n2 sector plates with the same shape, and the angle of each sector plate is 2π / n2; the number of the pre-combustion stage oil circuit elastic elements is an integer multiple of the number of the sector plates.

[0016] Further, the number of the sector plates n1 = 6 - 8; the number of the pre-combustion stage oil circuit elastic elements is the same as the number of the sector plates.

[0017] Further, the pre-combustion stage oil circuit rotating body is composed of n2 second solid spherical rings with a diameter d2 and an angle 2π / n2; the diameter d2 of the second solid spherical ring is less than 1 / 2 of the wall thickness of the pre-combustion stage oil pipe; the shape of the pre-combustion stage oil circuit rotating base is the same as the shape formed by the volume swept by the second solid spherical ring rotating 90°, and the rotation space formed inside the pre-combustion stage oil circuit rotating base is not greater than L = D2 / 2*(1 - cosπ / n2).

[0018] Further, the interface between the side of the pre-combustion stage oil circuit rotating base away from the pre-combustion stage oil circuit elastic element and the pre-combustion stage oil pipe is a plane, and this plane is perpendicular to the fuel flow direction.

[0019] The beneficial effect of adopting the above further technical solution is that when the pre-combustion stage oil circuit baffle completely closes the pre-combustion stage oil circuit, this plane can ensure that the fuel does not flow downstream through the gap between the pre-combustion stage oil circuit rotating body and the pre-combustion stage oil circuit rotating base, ensuring sealing.

[0020] It can be seen from this that the present invention provides a single-oil-circuit double-fuel supply mode combined atomization device. Compared with the prior art, the present invention has the following beneficial effects:

[0021] When the afterburner of an aeroengine ignites and starts, by controlling the output oil pressure of the fuel supply tank, the pressure difference between the upstream and downstream of the pre-combustion stage oil circuit baffle is made less than the tensile force of the elastic element of the pre-combustion stage oil circuit and at the same time less than the contraction force of the elastic element of the main combustion stage oil circuit. At this time, the pre-combustion stage oil circuit is connected to the main oil circuit, the main combustion stage oil circuit is closed to the main oil circuit, and the fuel finally reaches the centrifugal pressure nozzle for atomization. When the afterburner successfully ignites, increasing the fuel supply pressure of the fuel supply tank will cause the pressure difference between the upstream and downstream of the pre-combustion stage oil circuit baffle to start being greater than the tensile force of the elastic element of the pre-combustion stage oil circuit and at the same time slightly greater than the contraction force of the elastic element of the main combustion stage oil circuit. The elastic element of the pre-combustion stage oil circuit starts to drive the pre-combustion stage oil circuit baffle to rotate in the fuel flow direction, and the elastic element of the main combustion stage oil circuit starts to drive the main combustion stage oil circuit baffle to rotate in the fuel flow direction. At this time, the pre-combustion stage oil circuit starts to be closed to the main oil circuit, and the main combustion stage oil circuit starts to be connected to the main oil circuit. Further increasing the fuel supply pressure of the fuel supply tank, the pre-combustion stage oil circuit baffle is completely closed under the drive of the rotating body of the pre-combustion stage oil circuit to form a sealed circular surface, while the main combustion stage oil circuit baffle is completely opened under the drive of the rotating body of the main combustion stage oil circuit, and the main combustion stage oil circuit is completely connected to the main oil circuit. The fuel finally realizes atomization at the outlet of the direct injection nozzle. Therefore, without changing the original structure of the afterburner and without adding fuel pipelines, fuel flow distribution systems, hydraulic control systems, etc., the conversion of two fuel atomization methods of the afterburner is realized, and then the ignition and stable combustion of the afterburner are realized. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 The drawings are the structural schematic diagrams of a single-oil-circuit dual-fuel supply method combined atomization device provided by the present invention;

[0024] Figure 2 The drawings are the structural schematic diagrams of the main combustion stage oil circuit switch conversion mechanism and the pre-combustion stage oil circuit switch conversion mechanism in the state of the centrifugal pressure nozzle fuel supply method provided by the present invention;

[0025] Figure 3 The drawings are the structural schematic diagrams of the main combustion stage oil circuit switch conversion mechanism and the pre-combustion stage oil circuit switch conversion mechanism in the state of the direct injection nozzle fuel supply method provided by the present invention;

[0026] Figure 4 The drawings are Figure 1 Cross-sectional view A-A in

[0027] Figure 5The accompanying drawings are Figure 1 sectional view taken along line B-B in

[0028] Figure 6 The accompanying drawings are Figure 1 sectional view taken along line C-C in Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] As shown in Figure 1-6As shown in the figure, an embodiment of the present invention discloses a combined atomization device with a single oil circuit and dual fuel supply modes, which includes an oil supply pipe 1, a main combustion stage oil pipe 2, a pre-combustion stage oil pipe 3, a centrifugal pressure nozzle 4, a main combustion stage oil circuit switch conversion mechanism 5, a pre-combustion stage oil circuit switch conversion mechanism 6, and a direct injection nozzle 7. In this embodiment, the oil supply pipe 1 is a circular pipe, and the top end of the oil supply pipe 1 is connected and communicated with an oil supply tank to form a total oil circuit 11 inside the oil supply pipe 1. The top end of the main combustion stage oil pipe 2 is integrally connected to the oil supply pipe 1, and the bottom end of the main combustion stage oil pipe 2 is connected to the wall surface of the centrifugal pressure nozzle 4. In this embodiment, the main combustion stage oil pipe 2 is a circular pipe; the pre-combustion stage oil pipe 3 is sleeved inside the main combustion stage oil pipe 2. In this embodiment, the pre-combustion stage oil pipe 3 is a circular pipe, and the bottom end of the pre-combustion stage oil pipe 3 is connected to the inlet of the centrifugal pressure nozzle 4. The fuel is sprayed into the pre-combustion stage of the afterburner through the centrifugal pressure nozzle 4. There is a swirler inside the centrifugal pressure nozzle 4, which is used to improve the fuel atomization performance. The fuel atomization is realized through the pressure difference between the pre-combustion stage oil circuit and the afterburner, supplemented by the swirler, which is a commonly used atomization device in the art; a ring-shaped main combustion stage oil circuit 21 is formed between the main combustion stage oil pipe 2 and the pre-combustion stage oil pipe 3, and a pre-combustion stage oil circuit 31 is formed inside the pre-combustion stage oil pipe 3; the main combustion stage oil circuit switch conversion mechanism 5 is installed at the top end of the main combustion stage oil circuit 21; the pre-combustion stage oil circuit switch conversion mechanism 6 is installed at the top end of the pre-combustion stage oil circuit 31; the direct injection nozzle 7 is installed on the pipe wall of the main combustion stage oil pipe 21 and is communicated with the main combustion stage oil circuit 21. The fuel is sprayed into the main combustion stage of the afterburner through the direct injection nozzle 7. In this embodiment, the fuel atomization is realized only through the pressure difference between the main combustion stage oil circuit 21 and the afterburner. The diameter, quantity, and spacing of the direct injection nozzles 7 are determined by the performance of the afterburners of different types of aeroengines. The present invention combines the centrifugal pressure nozzle 4 and the direct injection nozzle 7, and a pre-combustion stage oil pipe 3 is additionally arranged inside the main combustion stage oil pipe 2. The pre-combustion stage oil circuit 31 formed inside the pre-combustion stage oil pipe 3 is used to supply fuel to the centrifugal pressure nozzle 4, and the main combustion stage oil circuit 21 formed between the main combustion stage oil pipe 2 and the pre-combustion stage oil pipe 3 is used to supply fuel to the direct injection nozzle 7. By changing the oil supply pressure of the oil supply tank to change the pressure upstream of the main combustion stage oil circuit switch conversion mechanism 5 and the pre-combustion stage oil circuit switch conversion mechanism 6, a pressure difference is formed upstream and downstream of the main combustion stage oil circuit switch conversion mechanism 5 and the pre-combustion stage oil circuit switch conversion mechanism 6, so as to realize the opening or closing of the main combustion stage oil circuit switch conversion mechanism 5 and the pre-combustion stage oil circuit switch conversion mechanism 6, and further control the on-off of the main combustion stage oil circuit 21 and the pre-combustion stage oil circuit 31, and realize the conversion between the two fuel atomization modes.

[0031] Specifically, the main combustion stage fuel circuit switch conversion mechanism 5 includes a main combustion stage fuel circuit rotating seat 51, a main combustion stage fuel circuit rotating body 52, a main combustion stage fuel circuit baffle 53, and a main combustion stage fuel circuit elastic element 54. The main combustion stage fuel circuit rotating seat 51 is recessed and fixed on the inner wall of the main combustion stage fuel pipe 2; the main combustion stage fuel circuit rotating body 52 is rotatably connected to the main combustion stage fuel circuit rotating seat 51; the main combustion stage fuel circuit baffle 53 is integrally connected to the main combustion stage fuel circuit rotating body 52; one end of the main combustion stage fuel circuit elastic element 54 is fixed on the inner wall of the main combustion stage fuel pipe 2, and the other end of the main combustion stage fuel circuit elastic element 54 is fixed on the bottom wall of the main combustion stage fuel circuit baffle 53. In this embodiment, the main combustion stage fuel circuit elastic element 54 is a spring.

[0032] Specifically, the main combustion stage fuel circuit baffle 53 is composed of n1 fan-shaped rings 531 with the same shape, and the angle of each fan-shaped ring 531 is 2π / n1; the number of the main combustion stage fuel circuit elastic elements 54 is an integer multiple of the number of the fan-shaped rings 531.

[0033] Specifically, the number of the fan-shaped rings 531, n1 = 6 - 8; the number of the main combustion stage fuel circuit elastic elements 54 is the same as the number of the fan-shaped rings 531.

[0034] Specifically, the main combustion stage fuel circuit rotating body 52 is composed of n1 first solid spherical rings with a diameter d1 and an angle of 2π / n1. Each first solid spherical ring is integrally connected to the corresponding fan-shaped ring 531 through a support column. The diameter d1 of the first solid spherical ring is less than 1 / 2 of the wall thickness of the fuel supply pipe 1; the shape of the main combustion stage fuel circuit rotating seat 51 is the same as the shape formed by the volume swept by the first solid spherical ring rotating 90°. When the fuel supply pressure is greater than the elastic force of the main combustion stage fuel circuit elastic element, the rotation direction of the first solid spherical ring is the same as the fuel flow direction. On the contrary, when the fuel supply pressure is less than the elastic force of the main combustion stage fuel circuit elastic element, the rotation direction of the first solid spherical ring is opposite to the fuel flow direction, and the fuel circuit opening gradually decreases; the rotation space formed inside the main combustion stage fuel circuit rotating seat 51 is not greater than L = D1 / 2*(1 - cosπ / n1).

[0035] Specifically, the pre-combustion stage fuel circuit switch conversion mechanism 6 includes a pre-combustion stage fuel circuit rotating seat 61, a pre-combustion stage fuel circuit rotating body 62, a pre-combustion stage fuel circuit baffle 63, and a pre-combustion stage fuel circuit elastic element 64. The pre-combustion stage fuel circuit rotating seat 61 is recessed and fixed on the inner wall of the pre-combustion stage fuel pipe 3; the pre-combustion stage fuel circuit rotating body 62 is rotatably connected to the pre-combustion stage fuel circuit rotating seat 61; the pre-combustion stage fuel circuit baffle 63 is integrally connected to the pre-combustion stage fuel circuit rotating body 62; one end of the pre-combustion stage fuel circuit elastic element 64 is fixed on the inner wall of the pre-combustion stage fuel pipe 3, and the other end of the pre-combustion stage fuel circuit elastic element 64 is fixed on the top wall of the pre-combustion stage fuel circuit baffle 63. In this embodiment, the pre-combustion stage fuel circuit elastic element 64 is a spring.

[0036] Specifically, the pre-combustion stage oil passage baffle 63 is composed of n2 sector plates 631 with the same shape, and the angle of each sector plate 631 is 2π / n2; the number of pre-combustion stage oil passage elastic elements 64 is an integer multiple of the number of sector plates 631.

[0037] Specifically, the number of sector plates 631, n1 = 6 - 8; the number of pre-combustion stage oil passage elastic elements 64 is the same as the number of sector plates 631.

[0038] Specifically, the pre-combustion stage oil passage rotating body 62 is composed of n2 second solid spherical rings with a diameter d2 and an angle 2π / n2; the diameter d2 of the second solid spherical ring is less than 1 / 2 of the wall thickness of the pre-combustion stage oil pipe 3; the shape of the pre-combustion stage oil passage rotating seat 61 is the same as the shape formed by the volume swept by the second solid spherical ring rotating 90°; when there is no oil supply, the pre-combustion stage oil passage baffle is pulled to the open position by the pre-combustion stage oil passage elastic element; after oil supply, when the oil supply pressure is greater than the elastic force of the pre-combustion stage oil passage elastic element, the pre-combustion stage oil passage baffle starts to close slowly, and at this time, the rotation direction is along the fuel flow direction; the rotation space formed inside the pre-combustion stage oil passage rotating seat 61 is not greater than L = D2 / 2*(1 - cosπ / n2).

[0039] Specifically, the interface between the side of the pre-combustion stage oil passage rotating seat 61 away from the pre-combustion stage oil passage elastic element 64 and the pre-combustion stage oil pipe 3 is a plane, and the plane is perpendicular to the fuel flow direction, so that when the pre-combustion stage oil passage baffle 63 completely closes the pre-combustion stage oil passage 31, this plane can ensure that the fuel does not flow downstream through the gap between the pre-combustion stage oil passage rotating body 62 and the pre-combustion stage oil passage rotating seat 61.

[0040] The working principle of the present invention:

[0041] When there is no fuel supply (initial state), the main combustion stage fuel passage baffle 53 completely closes the main combustion stage fuel passage 21 under the dual action of the elastic force of the main combustion stage fuel passage elastic element 54 and the wall pressure of the pre-combustion stage fuel passage 31, while the pre-combustion stage fuel passage baffle 63 completely opens the pre-combustion stage fuel passage 31 under the action of the elastic force of the pre-combustion stage fuel passage elastic element 64; when the afterburner of the aero-engine ignites and starts, by controlling the output oil pressure of the fuel supply tank, it is ensured that the upstream and downstream oil pressures of the pre-combustion stage fuel passage switch conversion mechanism 6 are less than the tensile force of the pre-combustion stage fuel passage elastic element 64 and at the same time less than the contraction force of the main combustion stage fuel passage elastic element 54, forming a flow channel for the pre-combustion stage fuel passage 31, and finally reaching the centrifugal pressure nozzle 4 for atomization; when the afterburner successfully ignites, increasing the fuel supply pressure of the fuel supply tank will cause the upstream and downstream oil pressures of the pre-combustion stage fuel passage switch conversion mechanism 6 to start to be greater than the tensile force of the pre-combustion stage fuel passage elastic element 64 and at the same time slightly greater than the contraction force of the main combustion stage fuel passage elastic element 54. The pre-combustion stage fuel passage elastic element 64 starts to drive the pre-combustion stage fuel passage baffle 63 to rotate in the fuel flow direction, the pre-combustion stage fuel passage 31 starts to close, and the main combustion stage fuel passage 21 starts to open; further increasing the fuel supply pressure of the fuel supply tank, the pre-combustion stage fuel passage baffle 63 is completely closed under the drive of the pre-combustion stage fuel passage rotating body 62, forming a sealed circular surface, and a line seal is provided between the lower plane of the pre-combustion stage fuel passage baffle 63 and the pre-combustion stage fuel passage rotating seat 61 to prevent fuel from flowing out through the rotating gap between the pre-combustion stage fuel passage rotating seat 61 and the pre-combustion stage fuel passage rotating body 62, while the main combustion stage fuel passage baffle 53 is completely opened under the drive of the main combustion stage fuel passage rotating body 52, forming a flow channel for the main combustion stage fuel passage 21, and finally atomization is achieved at the outlet of the direct injection nozzle 7, and stable combustion (final state) is achieved. Thus, without adding accessories to the aero-engine and without changing the existing structure of the aero-engine, the pre-combustion stage fuel passage 31 and the main combustion stage fuel passage 21 are combined into one fuel passage, and no additional hydraulic control device is required, and it can be achieved only with a simple physical structure, reducing the complexity of the fuel supply and fuel regulation system of the dual fuel supply method.

[0042] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and reference can be made to the description of the method part for the relevant parts.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single-oil-way dual-fuel supply combined atomization device, including an oil supply pipe, the top end of the oil supply pipe is connected and communicated with an oil supply tank to form a main oil way inside the oil supply pipe, and it is characterized in that, It also includes a main combustion stage fuel pipe, a pre-combustion stage fuel pipe, a centrifugal pressure nozzle, a main combustion stage fuel circuit switch conversion mechanism, a pre-combustion stage fuel circuit switch conversion mechanism, and a direct injection nozzle. The top end of the main combustion stage fuel pipe is integrally connected to the fuel supply pipe, and the bottom end of the main combustion stage fuel pipe is connected to the wall surface of the centrifugal pressure nozzle. The pre-combustion stage fuel pipe is sleeved inside the main combustion stage fuel pipe, and the bottom end of the pre-combustion stage fuel pipe is connected to the inlet of the centrifugal pressure nozzle, so as to form an annular main combustion stage fuel circuit between the main combustion stage fuel pipe and the pre-combustion stage fuel pipe, and a pre-combustion stage fuel circuit is formed inside the pre-combustion stage fuel pipe. The main combustion stage fuel circuit switch conversion mechanism is installed at the top end of the main combustion stage fuel circuit. The pre-combustion stage fuel circuit switch conversion mechanism is installed at the top end of the pre-combustion stage fuel circuit. The direct injection nozzle is installed on the pipe wall of the main combustion stage fuel pipe and is communicated with the main combustion stage fuel circuit. The main combustion stage fuel circuit switch conversion mechanism includes a main combustion stage fuel circuit rotating seat, a main combustion stage fuel circuit rotating body, a main combustion stage fuel circuit baffle, and a main combustion stage fuel circuit elastic element. The main combustion stage fuel circuit rotating seat is recessed and fixed on the inner wall of the main combustion stage fuel pipe. The main combustion stage fuel circuit rotating body is rotatably connected to the main combustion stage fuel circuit rotating seat. The main combustion stage fuel circuit baffle is integrally connected to the main combustion stage fuel circuit rotating body. One end of the main combustion stage fuel circuit elastic element is fixed on the inner wall of the main combustion stage fuel pipe, and the other end of the main combustion stage fuel circuit elastic element is fixed on the bottom wall of the main combustion stage fuel circuit baffle. The pre-combustion stage fuel circuit switch conversion mechanism includes a pre-combustion stage fuel circuit rotating seat, a pre-combustion stage fuel circuit rotating body, a pre-combustion stage fuel circuit baffle, and a pre-combustion stage fuel circuit elastic element. The pre-combustion stage fuel circuit rotating seat is recessed and fixed on the inner wall of the pre-combustion stage fuel pipe. The pre-combustion stage fuel circuit rotating body is rotatably connected to the pre-combustion stage fuel circuit rotating seat. The pre-combustion stage fuel circuit baffle is integrally connected to the pre-combustion stage fuel circuit rotating body. One end of the pre-combustion stage fuel circuit elastic element is fixed on the inner wall of the pre-combustion stage fuel pipe, and the other end of the pre-combustion stage fuel circuit elastic element is fixed on the top wall of the pre-combustion stage fuel circuit baffle.

2. The combined atomization device with a single oil circuit and dual fuel supply mode according to claim 1, characterized in that, The main combustion stage fuel circuit baffle is composed of n1 fan-shaped rings with the same shape, and the angle of each fan-shaped ring is 2π / n1. The number of the main combustion stage fuel circuit elastic elements is an integer multiple of the number of the fan-shaped rings.

3. The combined atomization device with a single oil circuit and dual fuel supply mode according to claim 2, characterized in that, The number of the fan-shaped rings n1 = 6 - 8. The number of the main combustion stage fuel circuit elastic elements is the same as the number of the fan-shaped rings.

4. A single-oil-way dual-fuel supply combined atomization device according to claim 1, characterized in that, The pre-combustion stage fuel circuit baffle is composed of n2 fan-shaped plates with the same shape, and the angle of each fan-shaped plate is 2π / n2. The number of the pre-combustion stage fuel circuit elastic elements is an integer multiple of the number of the fan-shaped plates.

5. The combined atomization device with a single oil circuit and dual fuel supply mode according to claim 4, characterized in that, The number of the fan-shaped plates n2 = 6 - 8. The number of the pre-combustion stage fuel circuit elastic elements is the same as the number of the fan-shaped plates.

6. The combined atomization device with a single oil circuit and dual oil supply mode according to claim 4, characterized in that, The interface surface between the pre-combustion stage fuel circuit rotating seat and the pre-combustion stage fuel pipe on the side away from the pre-combustion stage fuel circuit elastic element is a plane, and the plane is perpendicular to the fuel flow direction.

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