CN115218217A - The main combustion stage head of the central staged combustion chamber using the porous multi-angle fuel injection ring structure - Google Patents

Abstract

The invention relates to the technical field of combustion chambers, and provides a main combustion stage head of a central staged combustion chamber adopting a porous multi-angle oil injection ring structure, which comprises a first sleeve, a second sleeve, a first swirl blade and a ring-shaped element, wherein the first sleeve is arranged on the first sleeve; the second sleeve is sleeved outside the first sleeve, and an air inlet channel is formed between the first sleeve and the second sleeve; a first annular cavity is formed between the first rotational flow blade and the first sleeve, and the annular piece is provided with a second annular cavity; the first rotational flow blade is provided with a third annular cavity; the inner wall surface of the annular piece is provided with a first through hole, and the first annular cavity, the second annular cavity and the third annular cavity are sequentially communicated and arranged and can form a first oil injection channel with the first through hole. Above-mentioned adopt porous multi-angle to spout oil ring structure's central hierarchical combustion chamber main combustion level head sprays the fuel to the air incoming flow that jets into from inlet channel through first oil spout passageway in, has ensured oil-gas mixture's homogeneity effectively, and simple structure, convenient assembling, and the processing cost is low.

Description

The main combustion stage head of the central staged combustion chamber using the porous multi-angle fuel injection ring structure

technical field

The invention relates to the technical field of combustion chambers, in particular to a main combustion stage head of a central grading combustion chamber adopting a porous multi-angle fuel injection ring structure.

Background technique

With the continuous enhancement of people's awareness of environmental protection, all walks of life have their own standards and requirements for environmental protection. In the air transportation industry, the International Civil Aviation Organization has promulgated corresponding airworthiness regulations. strict requirements. Among them, the aircraft engine combustion chamber is the source of aircraft power and the main source of its pollution emissions. Therefore, low-emission combustion technology is one of the focuses of current research.

Lean premixed combustion is the current mainstream aero-engine low-emission combustion technology. By reducing the overall temperature of the flame, lower nitrogen oxide emissions can be achieved. Among them, the central staged combustion chamber is one of the common structures. The central staged burners are arranged in radial stages along the central axis: the central inner ring is the pre-combustion stage, and a small part of the air enters the burner through the pre-combustion stage, and is directly mixed with the fuel injected from the downstream central body nozzle into the combustion chamber for combustion. , showing the characteristics of rich oil diffusion combustion, thus ensuring the overall flame stability and ignition performance; the outer ring is the main combustion stage, and most of the air enters the burner through the main combustion stage, and is carried out in advance with the fuel injected into the channel. After a certain degree of blending, it enters the combustion chamber for combustion, so it appears as a lean premixed combustion, which can ensure that the final emission output of the combustion reaches a lower level.

In the design of the main combustion stage of the central staged combustion chamber, it is necessary to ensure that the mixture of fuel and air can achieve a good degree of mixing in the main combustion stage channel to ensure that the concentration distribution of the reactants is uniform. However, due to the limited length of the main combustion stage channel in the current combustion chamber, after the fuel injection enters the channel, it still needs to go through a series of processes such as liquid mist crushing, blending, evaporation, etc., and the main combustion stage reactants cannot reach the level of complete premixing. As a result, the mixing degree of oil and gas is not high, and it is difficult to achieve lower emission levels.

SUMMARY OF THE INVENTION

The invention provides a main combustion stage head of a central grading combustion chamber with a porous multi-angle fuel injection ring structure, which is used to solve the problem of the central grading combustion chamber main combustion stage head with a porous multi-angle fuel injection ring structure in the prior art. The defects of low mixing degree of medium oil and gas and poor low emission effect.

The invention provides a main combustion stage head of a central grading combustion chamber adopting a porous multi-angle fuel injection ring structure, comprising: a first sleeve, a second sleeve, a first swirl vane and an annular member;

The second sleeve is sleeved on the outer side of the first sleeve, an air inlet channel is formed between the first sleeve and the second sleeve, and the first swirl vane and the annular member are are sequentially arranged in the air intake passage along the radial direction of the first sleeve;

A first annular cavity is formed between the first swirl vane and the first sleeve, the annular member is provided with a second annular cavity, the first annular cavity and the second annular cavity The bodies are all arranged along the axial extension direction of the first sleeve; the first swirl vane is provided with a third annular cavity, and the third annular cavity is along the radial extension direction of the first sleeve Wherein, the inner wall surface of the annular member is provided with a first through hole, the first annular cavity, the second annular cavity and the third annular cavity are sequentially arranged to pass through, and can be connected with the The first through hole forms a first fuel injection channel.

According to the main combustion stage head of a central staging combustion chamber adopting a porous multi-angle fuel injection ring structure provided by the present invention, the first swirl vane includes a first connecting portion and a second connecting portion;

The inner wall surface of the first connecting portion is sleeved on the outer wall surface of the first sleeve, the outer wall surface of the first sleeve is provided with a circumferentially penetrating recessed portion, and the recessed portion is connected with the first sleeve The inner wall surface of the part surrounds and forms the first annular cavity;

The second connecting portion is connected to the outer wall surface of the first connecting portion, and the annular member forms a first fuel injection space between the second connecting portion and the first connecting portion. The position of the through hole matches the first fuel injection space.

According to a main combustion stage head of a central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure provided by the present invention, there are multiple second connection parts, and the plurality of second connection parts are connected along the first connection The parts are arranged in sequence in the circumferential direction.

According to the main combustion stage head of a central staging combustion chamber using a multi-hole multi-angle fuel injection ring structure provided by the present invention, the outer wall surface of the annular member is provided with a second through hole, the first annular cavity, the The second annular cavity and the third annular cavity can form a second fuel injection channel with the second through hole.

According to the main combustion stage head of a central staging combustion chamber adopting a porous multi-angle fuel injection ring structure provided by the present invention, the main combustion stage head device further comprises a second swirl vane; the second swirl vane is provided with between the second sleeve and the annular member.

According to the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle fuel injection ring structure provided by the present invention, the second swirl vane includes a third connecting portion and a fourth connecting portion;

The outer wall surface of the third connecting part is attached to the inner wall surface of the second sleeve, the fourth connecting part is connected to the inner wall surface of the third connecting part, and the annular member is connected with the fourth A second fuel injection space is formed between the third connection part and the second fuel injection space, and the position of the second through hole matches the second fuel injection space.

According to the main combustion stage head of a central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure provided by the present invention, there are multiple fourth connection parts, and the plurality of fourth connection parts are connected along the third connection The parts are arranged in sequence in the circumferential direction.

According to a main combustion stage head of a central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure provided by the present invention, the first through holes and the second through holes are multiple; a plurality of the first through holes are provided. The holes are arranged on the inner side wall of the ring member along the circumferential direction of the ring member, and the plurality of second through holes are arranged on the outer side wall of the ring member along the circumferential direction of the ring member.

According to the main combustion stage head of the central grading combustion chamber adopting the porous multi-angle fuel injection ring structure provided by the present invention, the main combustion stage head device further comprises an oil passage nozzle, and the oil outlet of the oil passage nozzle The port is in a through connection with the first annular cavity.

According to the main combustion stage head of a central staging combustion chamber adopting a porous multi-angle fuel injection ring structure provided by the present invention, the main combustion stage head device further comprises a flow guide member, and the flow guide member is in the shape of a ring, so The flow guide member is connected to the side of the annular member facing away from the oil passage nozzle.

The main combustion stage head of the central staging combustion chamber using the multi-hole multi-angle fuel injection ring structure provided by the present invention forms an intake passage through the first sleeve and the second sleeve. A first swirl vane and an annular piece are arranged between the sleeves, a first annular cavity is formed between the first swirl vane and the first sleeve, the annular piece is provided with a second annular cavity, and the first swirl vane is provided with a second annular cavity. There is a third annular cavity, the first annular cavity, the second annular cavity and the third annular cavity are arranged in sequence, and together with the first through hole located on the annular member form a first fuel injection channel, through the first annular cavity The fuel injection channel injects fuel into the air flow injected from the intake channel to achieve uniform mixing of oil and gas; at the same time, the intake channel and the first fuel injection channel are independent of each other, and the corresponding intake volume, intake rate and injection The amount of fuel and the rate of fuel injection can be individually controlled. Therefore, the main combustion stage head of the central grading combustion chamber using the porous multi-angle fuel injection ring structure provided by the present invention can effectively ensure the uniformity of oil and gas mixing, and has a simple structure, convenient assembly, convenient processing and low processing cost.

In addition to the technical problems solved by the present invention described above, the technical features of the constituted technical solutions, and the advantages brought by the technical features of these technical solutions, other technical features of the present invention and the advantages brought by these technical features, Further description will be made in conjunction with the accompanying drawings, or learned through practice of the present invention.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Fig. 1 is the structural schematic diagram of the main combustion stage head of the central staging combustion chamber adopting the porous multi-angle fuel injection ring structure provided by the embodiment of the present invention;

Fig. 2 is the partial structural schematic diagram of the main combustion stage head of the central staging combustion chamber adopting the porous multi-angle fuel injection ring structure provided by the embodiment of the present invention;

3 is one of the schematic cross-sectional views of the main combustion stage head of the central staged combustion chamber using the porous multi-angle fuel injection ring structure provided by the embodiment of the present invention;

4 is the second schematic cross-sectional view of the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle fuel injection ring structure according to the embodiment of the present invention;

Fig. 5 is the partial schematic diagram at I place in Fig. 4;

Reference number:

1: the first sleeve; 2: the second sleeve; 3: the first swirl vane; 31: the first connecting part; 32: the second connecting part; 33: the third annular cavity; 4: the first annular cavity 5: Ring; 51: Second annular cavity; 52: First through hole; 53: Second through hole; 6: Second swirl vane; 61: Third connection part; 62: Fourth connection part ;7: Nozzle of oil circuit; 8: Air guide; A: Intake passage; B: First fuel injection space; C: Second fuel injection space.

Detailed ways

The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing this Inventive embodiments and simplified descriptions are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

In the embodiments of the present invention, unless otherwise expressly specified and limited, the first feature "above" or "under" the second feature may be in direct contact with the first and second features, or the first and second features pass through the middle indirect contact with the media. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In addition, in the description of the embodiments of the present invention, unless otherwise specified, "multiple", "multiple" and "multiple groups" mean two or more, "several", "several", "Groups" means one or more than one.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one example or example of embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The main combustion stage head of the central staged combustion chamber using the multi-hole multi-angle fuel injection ring structure provided by the embodiment of the present invention will be described below with reference to FIGS. 1 to 5 .

As shown in FIG. 1 and FIG. 2 , in the embodiment of the present invention, the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle fuel injection ring structure includes: a first sleeve 1 , a second sleeve 2 , a first Swirl vanes 3 and annular member 5 .

The second sleeve 2 is sleeved on the outside of the first sleeve 1 , an air intake channel A is formed between the first sleeve 1 and the second sleeve 2 , the first swirl vane 3 and the annular member 5 are along the first sleeve The radial direction of 1 is arranged in the intake passage A in sequence.

A first annular cavity 4 is formed between the first swirl vane 3 and the first sleeve 1, the annular member 5 is provided with a second annular cavity 51, and the first annular cavity 4 and the second annular cavity 51 are The axial extension direction of the first sleeve 1 is arranged; the first swirl vane 3 is provided with a third annular cavity 33, and the third annular cavity 33 is arranged along the radial extension direction of the first sleeve 1; A first through hole 52 is provided on the inner wall of .

Specifically, as shown in FIG. 3 , the overall structure of the main combustion stage head of the central staged combustion chamber adopting the multi-hole multi-angle fuel injection ring structure is cylindrical, that is to say, the first sleeve 1 and the second sleeve are in the shape of a cylinder. 2. The first swirl vane 3 and the annular member 5 are both annular structures.

As shown in Figure 1, the first sleeve 1 is arranged on the innermost layer of the main combustion stage head of the central staged combustion chamber adopting the porous multi-angle fuel injection ring structure, the first swirl vane 3, the annular member 5 and the second sleeve The cylinders 2 are sequentially sleeved on the outer side of the first sleeve 1 along the radial extending direction of the first sleeve 1 .

The axial extension lengths of the first sleeve 1 and the second sleeve 2 are approximately the same, and the axial extension lengths of the first swirl vanes 3 and the annular member 5 are smaller than the lengths of the first sleeve 1 and the second sleeve 2 1, an accommodating space is formed between the first sleeve 1 and the second sleeve 2, and the first swirl vane 3 and the annular member 5 are arranged on the left side of the accommodating space.

As shown in FIG. 3 , a first annular cavity 4 is formed between the inner wall surface of the first swirl vane 3 and the outer side wall of the first sleeve 1 . As shown in FIG. 5 , inside the first swirl vane 3 A second annular cavity 51 is provided. As shown in FIG. 4 , a third annular cavity 33 is provided in the annular member 5 , and the three cavities are connected to form a first oil passage.

As shown in FIG. 5 , there is also a first through hole 52 on the ring member 5 , the first through hole 52 is communicated with the third annular cavity 33 , and the fuel can be injected through the first through hole 52 to the between the first sleeve 1 and the second sleeve 2 .

It should be noted that the above-mentioned accommodating space can be communicated with the air intake device to form an air intake passage A, and the gas entering the accommodating space through the air intake passage A can interact with the fuel entering the accommodating space through the first oil passage. mix.

The size and arrangement position of the first through hole 52 are not specifically limited, and can be adapted according to actual needs. For example, the diameter of the first through hole 52 ranges from 0.3 to 1 mm. In order to adapt the spraying angle, the first through hole 52 can be set as an inclined plane, and the spraying angle thereof is between 30 and 150 degrees.

The main combustion stage head of the central staging combustion chamber using the multi-hole multi-angle fuel injection ring structure provided by the embodiment of the present invention is sleeved through the first sleeve 1 and the second sleeve 2 to form an intake passage A. At the same time, in the first sleeve 1 and the second sleeve 2 A first swirl vane 3 and an annular member 5 are arranged between the sleeve 1 and the second sleeve 2, a first annular cavity 4 is formed between the first swirl vane 3 and the first sleeve 1, and the annular member 5 is provided. There is a second annular cavity 51 , the first swirl vane 3 is provided with a third annular cavity 33 , the first annular cavity 4 , the second annular cavity 51 and the third annular cavity 33 are successively arranged to pass through, and are connected with the The first through holes 52 on the ring member 5 together form a first fuel injection channel, and through the first fuel injection channel, fuel is injected into the air flow injected from the intake channel A to achieve uniform mixing of oil and gas; The air passage A and the first fuel injection passage are independent of each other, and the corresponding intake air volume, intake rate and fuel injection volume and fuel injection rate can be controlled independently. Therefore, the main combustion stage head of the central grading combustion chamber using the porous multi-angle fuel injection ring structure provided by the present invention can effectively ensure the uniformity of oil and gas mixing, and has a simple structure, convenient assembly, convenient processing and low processing cost.

In an optional embodiment, the first swirl vane 3 includes a first connecting portion 31 and a second connecting portion 32 .

The inner wall surface of the first connecting portion 31 is sleeved on the outer wall surface of the first sleeve 1 , the outer wall surface of the first sleeve 1 is provided with a circumferentially penetrating recessed portion, and the recessed portion and the inner wall surface of the first connecting portion 31 are surrounded by A first annular cavity 4 is formed.

The second connecting portion 32 is connected to the outer wall surface of the first connecting portion 31 , the annular member 5 forms a first fuel injection space B between the second connecting portion 32 and the first connecting portion 31 , and the first through hole 52 has a space B for fuel injection. The position matches the first fuel injection space B.

Specifically, as shown in FIGS. 2 and 3 , the outer wall surface of the first sleeve 1 is provided with a circumferentially penetrating recessed portion, and the recessed portion is suitable for forming a first annular cavity with the inner wall surface of the first connecting portion 31 . 4, namely the oil circuit ring cavity.

In one embodiment, the inner wall surface of the first connection portion 31 abuts against the outer wall surface of the first sleeve 1 , and the outer wall surface of the first connection portion 31 is higher than the outer wall surface of the first sleeve 1 .

In another embodiment, as shown in FIG. 3 , a stepped structure is provided between the concave portion and the outer wall surface of the outermost layer of the first sleeve 1 , and the height of the stepped structure is exactly the same as the thickness of the first connecting portion 31 . Similarly, the first connecting portion 31 abuts against the stepped structure, so that the outer wall surface of the first connecting portion 31 is flush with the outer wall surface of the first sleeve 1 .

In order to ensure the degree of connection and the sealing effect of the cavity, the connection between the first connecting portion 6131 and the first sleeve 1 can be connected by welding to form a sealed cavity to prevent fuel leakage.

The second connecting portion 32 can be vertically arranged with the first connecting portion 31, or can be arranged obliquely, and its function is to act as a swirl vane to guide the gas entering from the intake passage A, so that the airflow can meet the designed swirl number. , and at the same time make the dispersion of the gas more uniform, so that the mixing of the fuel and the gas is more uniform.

In addition, the second connecting portion 32 is arranged between the first connecting portion 31 and the ring member 5, and also has the function of supporting and isolating the first fuel injection space B, and the first through hole 52 is arranged toward the first fuel injection space B, The fuel can enter the first fuel injection space B and be mixed with the swirled gas.

In an optional embodiment, there are multiple second connection portions 32 , and the plurality of second connection portions 32 are sequentially arranged along the circumferential direction of the first connection portion 31 .

Specifically, as shown in FIG. 4 , in order to further improve the uniform flow effect of the gas, the number of the second connecting parts 32 , that is, the blade body can be set to multiple, and the multiple second connecting parts 32 are along the circumference of the first connecting part 31 . Arranged in order in the direction, it can be arranged in parallel in sequence, or the plurality of second connecting parts 32 can be arranged by changing the angle according to actual needs.

In an optional embodiment, the outer wall surface of the ring member 5 is provided with a second through hole 53 , and the first annular cavity 4 , the second annular cavity 51 and the third annular cavity 33 can be formed with the second through hole 53 Second fuel injection channel.

Specifically, in order to further enhance the fuel injection efficiency, the second ring member 5 is further provided with a second through hole 53 . The arrangement of the second through hole 53 can refer to the arrangement of the first through hole 52 described above. It is only that the first through hole 52 is arranged on the inner wall surface of the ring member 5 and the second through hole 53 is arranged on the outer wall surface of the ring member 5. Those skilled in the art can adapt the second through hole 53 according to the first through hole 52. It will not be repeated here.

The setting position of the second through hole 53 may correspond to the first through hole 52 , or may be dislocated, and the specific position may be set according to actual requirements.

The first annular cavity 4 , the second annular cavity 51 and the third annular cavity 33 together with the second through hole 53 on the annular member 5 form a second fuel injection channel.

In an optional embodiment, the main combustion stage head device further includes a second swirl vane 6 ; the second swirl vane 6 is provided between the second sleeve 2 and the annular member 5 .

Specifically, as shown in FIG. 1 , a second swirl vane 6 is further provided between the inner wall surface of the second sleeve 2 and the outer wall surface of the annular member 5 , and the second sleeve 2 is separated by the second swirl vane 6 . It is isolated from the space between the ring members 5 to provide a fuel injection space for the second fuel injection channel.

In an optional embodiment, the second swirl vane 6 includes a third connection portion 61 and a fourth connection portion 62 .

The outer wall surface of the third connecting portion 61 is attached to the inner wall surface of the second sleeve 2 , the fourth connecting portion 62 is connected to the inner wall surface of the third connecting portion 61 , and the ring member 5 is connected to the third connecting portion 62 through the fourth connecting portion 62 and the third connecting portion 62 . A second fuel injection space C is formed between the connecting parts 61 , and the position of the second through hole 53 matches the second fuel injection space C.

Specifically, as shown in FIG. 3 and FIG. 5 , the structure of the second swirl vane 6 is similar to that of the first swirl vane 3 , and both are annular T-shaped structures composed of two connecting parts.

The second swirl vanes 6 and the first swirl vanes 3 are arranged symmetrically with respect to the ring member 5 , that is, the outer wall surface of the third connecting portion 61 is arranged in close contact with the inner wall surface of the second sleeve 2 , and the fourth connecting portion is arranged on the first Between the inner wall surface of the three connecting portions 61 and the outer wall surface of the ring member 5 . The fourth connecting portion not only has a supporting function, but also can separate the second fuel injection space C between the third connecting portion 61 and the ring member 5. The above-mentioned second through holes 53 are arranged toward the second fuel injection space C, so that the The fuel enters the second fuel injection space C and is mixed with the swirled gas.

The fourth connecting portion 62 can be arranged vertically with the third connecting portion 61, or can be arranged obliquely. Its function, like the second connecting portion 32, is also used as a swirl vane to guide the gas entering from the intake passage A, so that the gas The dispersion is more uniform, so that the mixing of fuel and gas is more uniform.

Further, in order to further improve the uniform flow effect of the gas, there are multiple fourth connecting portions 62 , and the multiple fourth connecting portions 62 are sequentially arranged along the circumferential direction of the third connecting portion 61 .

The plurality of fourth connecting portions 62 may be arranged in parallel in sequence, or the plurality of fourth connecting portions 62 may be arranged at different angles according to actual needs. The specific arrangement is not limited, as long as the swirl effect can be achieved.

In an optional embodiment, there are multiple first through holes 52 and second through holes 53 ; multiple first through holes 52 are arranged on the inner side wall of the annular member 5 along the circumferential direction of the annular member 5 , and a plurality of first through holes 52 The two through holes 53 are disposed on the outer side wall of the ring member 5 along the circumferential direction of the ring member 5 .

Specifically, in order to further ensure the fuel injection effect and provide the mixing uniformity of oil and gas adaptively, a plurality of first through holes 52 located on the inner side wall of the ring member 5 can be provided, and a second through hole 52 located on the outer side wall of the ring member 5 can be provided. The through holes 53 may also be provided in plural.

The number of the first through holes 52 may or may not correspond to the second through holes 53 , and the number of the first through holes 52 and the second through holes 53 is preferably in the range of 10 to 40.

In the embodiment of the present invention, in order to ensure the uniformity of oil and gas mixing, one or more first through holes 52 may be correspondingly provided in the plurality of first fuel injection spaces B separated by the plurality of second connecting portions 32; One or more second through holes 53 can be correspondingly provided in the plurality of second fuel injection spaces C separated by the fourth connecting portion, and the number of the through holes can be adaptively changed, thereby ensuring the adjustable shape of oil and gas mixing.

In an optional embodiment, the main combustion stage head device further includes an oil passage nozzle 7 , and an oil outlet of the oil passage nozzle 7 is in a through connection with the first annular cavity 4 .

Specifically, the fuel enters the first annular cavity 4 through the oil passage nozzle 7 , enters the third annular cavity 33 through the second annular cavity 51 , and then the first through hole 52 and the first through hole 52 on the first swirl vane 3 and the third annular cavity 33 through the second annular cavity 51 The two through holes 53 are sprayed into the first fuel injection space B and the second fuel injection space C. At the same time, under the action of the intake passage A, the swirl vanes can further promote the injection of fuel into the rotating flow and mix with the gas to form The oil and gas mixture enters the combustion chamber after a certain degree of premixing, and forms a swirling premixed flame to participate in the combustion process.

It should be noted that: the first through hole 52 and the second through hole 53 are used as fuel injection ports, and their positions, quantities and injection angles can be changed according to actual needs; the deflection angle of the first swirl vane 3 and the second swirl The deflection angle of the flow vanes 6 can also be adjusted according to actual needs, thereby changing the strengthening effect of the oil-gas premixing degree, realizing different oil-gas mixing effects, and adjusting the flame structure of the main combustion stage, thereby achieving the purpose of low-emission combustion.

In an optional embodiment, the main combustion stage head device further includes a flow guide member 8 , the flow guide member 8 is in the shape of a ring, and the flow guide member 8 is connected to the side of the annular member 5 facing away from the oil passage nozzle 7 .

Specifically, as shown in FIG. 2 and FIG. 3 , in order to prevent the flow separation between the two air flows in the first fuel injection space B and the second fuel injection space C, a guide is provided at the right end of the ring member 5 . The flow member 8 and the flow guide member 8 can be a conical structure, a trapezoidal structure, or other structures that extend outward from the right end of the ring member 5 and gradually become smaller in width, and the structure is not specified. It is limited to be able to conduct flow diversion and achieve the effect of circumferential aerodynamic uniform flow.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A central grading combustion chamber main combustion stage head adopting a multi-hole multi-angle fuel injection ring structure is characterized in that, comprising: a first sleeve, a second sleeve, a first swirl vane and an annular member; The second sleeve is sleeved on the outer side of the first sleeve, an air inlet channel is formed between the first sleeve and the second sleeve, and the first swirl vane and the annular member are are sequentially arranged in the air intake passage along the radial direction of the first sleeve; A first annular cavity is formed between the first swirl vane and the first sleeve, the annular member is provided with a second annular cavity, the first annular cavity and the second annular cavity The bodies are all arranged along the axial extension direction of the first sleeve; the first swirl vane is provided with a third annular cavity, and the third annular cavity is along the radial extension direction of the first sleeve Wherein, the inner wall surface of the annular member is provided with a first through hole, the first annular cavity, the second annular cavity and the third annular cavity are sequentially arranged to pass through, and can be connected with the The first through hole forms a first fuel injection channel. 2 . The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle fuel injection ring structure according to claim 1 , wherein the first swirl vane comprises a first connecting portion and a second connecting portion; 3 . The inner wall surface of the first connecting portion is sleeved on the outer wall surface of the first sleeve, the outer wall surface of the first sleeve is provided with a circumferentially penetrating recessed portion, and the recessed portion is connected with the first sleeve The inner wall surface of the part surrounds and forms the first annular cavity; The second connecting portion is connected to the outer wall surface of the first connecting portion, and the annular member forms a first fuel injection space between the second connecting portion and the first connecting portion. The position of the through hole matches the first fuel injection space. 3 . The main combustion stage head of the central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure according to claim 2 , wherein there are multiple second connecting parts, and there are multiple second connecting parts. 4 . They are arranged in sequence along the circumferential direction of the first connecting portion. 4 . The main combustion stage head of the central staged combustion chamber adopting a multi-hole multi-angle fuel injection ring structure according to claim 1 , wherein the outer wall surface of the annular member is provided with a second through hole, and the first The annular cavity, the second annular cavity and the third annular cavity can form a second fuel injection channel with the second through hole. 5 . The main combustion stage head of the central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure according to claim 4 , wherein the main combustion stage head device further comprises a second swirl vane; the The second swirl vane is arranged between the second sleeve and the annular member. 6 . The main combustion stage head of the central staged combustion chamber using the porous multi-angle fuel injection ring structure according to claim 5 , wherein the second swirl vane comprises a third connection portion and a fourth connection portion; 7 . The outer wall surface of the third connecting part is attached to the inner wall surface of the second sleeve, the fourth connecting part is connected to the inner wall surface of the third connecting part, and the annular piece is connected with the fourth A second fuel injection space is formed between the third connection part and the second fuel injection space, and the position of the second through hole matches the second fuel injection space. 7 . The main combustion stage head of the central staged combustion chamber adopting the multi-hole multi-angle fuel injection ring structure according to claim 6 , wherein there are multiple fourth connecting parts, and there are multiple fourth connecting parts. 8 . They are arranged in sequence along the circumferential direction of the third connecting portion. 8 . The main combustion stage head of the central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure according to claim 6 , wherein the first through hole and the second through hole are multiple; The first through holes are disposed on the inner side wall of the annular member along the circumferential direction of the annular member, and the second through holes are disposed along the circumferential direction of the annular member on the inner sidewall of the annular member. outer side wall. 9 . The main combustion stage head of the central grading combustion chamber using a multi-hole multi-angle fuel injection ring structure according to claim 1 , wherein the main combustion stage head device further comprises an oil passage nozzle, the oil The oil outlet of the road connector is in a through connection with the first annular cavity. 10 . The main combustion stage head of the central staged combustion chamber using a multi-hole multi-angle fuel injection ring structure according to claim 9 , wherein the main combustion stage head device further comprises a flow guide, the flow guide The piece is in the shape of a ring, and the flow guide piece is connected to the side of the annular piece that faces away from the oil passage nozzle.

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