CN115218217B - Main combustion stage head of central staged combustion chamber adopting porous multi-angle oil 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 centrally graded combustion chamber adopting a multi-hole multi-angle fuel injection ring structure, including a first sleeve, a second sleeve, a first swirl vane and a ring; The second sleeve is sleeved on the outside of 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 swirl vane and the first sleeve, and the annular The part is provided with a second annular cavity; the first swirl blade is provided with a third annular cavity; the inner wall of the annular part is provided with a first through hole, the first annular cavity, the second annular cavity and the third annular cavity The bodies are disposed sequentially through, and can form a first fuel injection channel with the first through hole. The head of the main combustion stage of the central staged combustion chamber with a multi-hole multi-angle fuel injection ring structure injects fuel through the first fuel injection channel into the incoming air flow injected from the intake channel, which effectively ensures the uniformity of oil and gas mixing. Moreover, the structure is simple, the assembly is convenient, and the processing cost is low.

Description

The head of the main combustion stage of the center-staged combustor with a multi-hole 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 staged combustion chamber adopting a porous multi-angle oil 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-fuel premixed combustion is currently the mainstream low-emission combustion technology for aero-engines. It reduces the overall temperature of the flame to achieve lower nitrogen oxide emissions. Among them, the central staged combustion chamber is one of the common structures. The centrally staged burner is arranged in radial stages along the central axis: the central inner ring is the pre-combustion stage, a small part of the air enters the burner through the pre-combustion stage, and directly enters the combustion chamber with the fuel injected by the downstream central body nozzle for combustion. , showing the characteristics of oil-rich diffusion combustion, so as to ensure the overall flame stability and ignition performance; the outer ring is the main combustion stage, most of the air enters the burner through the main combustion stage, and is in advance with the fuel injected into the channel. After a certain degree of blending, it enters the combustion chamber for combustion, so it presents lean oil premixed combustion, which can ensure that the final emission output of combustion reaches a low level.

In the design of the main combustion stage of the central staged combustor, it is necessary to ensure that the mixture of fuel and air reaches a good mixing degree in the main combustion stage channel to ensure that the concentration of the reactants is evenly distributed. However, due to the limited channel length of the main combustion stage in the current combustion chamber, after the fuel injection enters the channel, it needs to go through a series of processes such as liquid mist breaking, mixing, and evaporation. The main combustion stage reactants cannot be completely premixed, so As a result, the degree of oil and gas blending is not high, and it is difficult to achieve a lower emission level.

Contents of the invention

The present invention provides a main combustion stage head of a centrally graded combustor adopting a porous multi-angle fuel injection ring structure, which is used to solve the problem of using a porous multi-angle fuel injection ring structure in the prior art. The degree of oil and gas blending is not high, and the low emission effect is not good.

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

The second sleeve is sleeved on the outside 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 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 body is arranged along the axial extension direction of the first sleeve; the first swirl blade is provided with a third annular cavity, and the third annular cavity is along the radial extension direction of the first sleeve Setting; wherein, the inner wall surface of the ring member is provided with a first through hole, the first ring cavity, the second ring cavity and the third ring cavity are sequentially arranged through, and can be connected with the The first through hole forms a first oil injection channel.

According to the main combustion stage head of a central staged combustor 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, and the outer wall surface of the first sleeve is provided with a circumferentially penetrating concave portion, and the concave portion is connected to the first connecting portion. The inner wall of the part surrounds and forms the first annular cavity;

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

According to a centrally staged combustion chamber main combustion stage head adopting a multi-hole multi-angle fuel injection ring structure provided by the present invention, there are multiple second connecting parts, and the multiple second connecting parts are connected along the first The circumferential direction of the part is laid out in sequence.

According to the main combustion stage head of a central staged combustor adopting a porous multi-angle fuel injection ring structure provided by the present invention, the outer wall of the ring 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 oil injection channel with the second through hole.

According to the main combustion stage head of a central staged combustor adopting a porous multi-angle fuel injection ring structure provided by the present invention, the main combustion stage head device also includes a second swirl vane; the second swirl vane is set between the second sleeve and the ring.

According to the main combustion stage head of a central staged combustor adopting a 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 connection part is attached to the inner wall surface of the second sleeve, the fourth connection part is connected to the inner wall surface of the third connection part, and the ring part is connected with the fourth connection part. A second oil injection space is formed between the portion and the third connecting portion, and the position of the second through hole matches the second oil injection space.

According to a central staged combustor main combustion stage head adopting a porous multi-angle fuel injection ring structure provided by the present invention, there are a plurality of fourth connecting parts, and the plurality of fourth connecting parts are connected along the third The circumferential direction of the part is laid out in sequence.

According to the main combustion stage head of a central staged combustor adopting a porous multi-angle fuel injection ring structure provided by the present invention, there are a plurality of the first through holes and the second through holes; a plurality of the first through holes Holes are provided 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 provided on the outer wall of the ring member along the circumferential direction of the ring member.

According to the main combustion stage head of a central staged combustor adopting a porous multi-angle fuel injection ring structure provided by the present invention, the main combustion stage head device also includes an oil passage nozzle, and the oil outlet of the oil passage nozzle The mouth is connected through the first annular cavity.

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

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

In addition to the above-described technical problems solved by the present invention, the technical features of the formed 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 the practice of the present invention.

Description of drawings

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 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. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of the head of the main combustion stage of a central staged combustor adopting a porous multi-angle fuel injection ring structure provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the local structure of the head of the main combustion stage of the central staged combustor adopting the porous multi-angle fuel injection ring structure provided by the embodiment of the present invention;

Fig. 3 is one of the cross-sectional schematic diagrams of the head of the main combustion stage of the central staged combustor adopting the porous multi-angle fuel injection ring structure provided by the embodiment of the present invention;

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

Fig. 5 is the local schematic diagram of I place among Fig. 4;

Reference signs:

1: first sleeve; 2: second sleeve; 3: first swirl vane; 31: first connecting part; 32: second connecting part; 33: third annular cavity; 4: first annular cavity 5: ring; 51: second annular cavity; 52: first through hole; 53: second through hole; 6: second swirl vane; 61: third connection; 62: fourth connection ; 7: oil passage nozzle; 8: guide piece; A: air intake channel; B: first fuel injection space; C: second fuel injection space.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used 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", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present invention.

In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. 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 specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature may pass through the middle of the second feature. Media indirect contact. Moreover, "above", "above" and "above" the first feature on 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 higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

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

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

The head of the main combustion stage of the centrally staged combustor using the multi-hole multi-angle fuel injection ring structure provided by the embodiment of the present invention is 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 head of the main combustion stage of the central staged combustor adopting the porous multi-angle fuel injection ring structure includes: a first sleeve 1, a second sleeve 2, a first The swirl blade 3 and the ring 5.

The second sleeve 2 is sleeved on the outside of the first sleeve 1, an air inlet passage A is formed between the first sleeve 1 and the second sleeve 2, and the first swirl blade 3 and the ring 5 are arranged along the first sleeve. The radial direction of 1 is arranged in the air intake passage A in turn.

A first annular cavity 4 is formed between the first swirl vane 3 and the first sleeve 1, and the ring member 5 is provided with a second annular cavity 51. The first annular cavity 4 and the second annular cavity 51 are all along the The axial extension direction of the first sleeve 1 is set; the first swirl vane 3 is provided with a third annular cavity 33, and the third annular cavity 33 is set along the radial extension direction of the first sleeve 1; wherein, the ring member The inner wall surface of 5 is provided with a first through hole 52, the first annular cavity 4, the second annular cavity 51 and the third annular cavity 33 are sequentially arranged through, and can form a first oil injection channel with the first through hole 52 .

Specifically, as shown in Figure 3, the overall structure of the head of the main combustion stage of the central staged combustion chamber with a porous multi-angle fuel injection ring structure is cylindrical, that is to say, the first sleeve 1, the second sleeve 2. Both the first swirl vane 3 and the ring member 5 are ring-shaped.

As shown in Figure 1, the first sleeve 1 is arranged on the innermost layer of the head of the main combustion stage of the central staged combustor adopting a porous multi-angle oil injection ring structure, and the first swirl blade 3, the ring member 5 and the second sleeve The cylinder 2 is sheathed on the outside of the first sleeve 1 in sequence along the radial extension direction of the first sleeve 1 .

Wherein, 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 vane 3 and the ring member 5 are smaller than the lengths of the first sleeve 1 and the second sleeve 2 , as shown in FIG. 1 , an accommodating space is formed between the first sleeve 1 and the second sleeve 2 , and the first swirl blade 3 and the ring member 5 are arranged on the left side of the accommodating space.

As shown in Figure 3, a first annular cavity 4 is formed between the inner wall surface of the first swirl vane 3 and the outer wall of the first sleeve 1, as shown in Figure 5, in 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 ring member 5 , and the three cavities are arranged in communication to form a first oil channel.

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

It should be noted that the above accommodating space can communicate 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 be exchanged with the fuel entering the accommodating space through the first oil channel. mix.

The size and location of the first through hole 52 are not specifically limited, and can be adaptively set according to actual needs. For example, the diameter of the first through hole 52 ranges from 0.3 to 1 mm. In order to adaptably change the spraying angle, the first through hole 52 can be set in a slope shape, and the spraying angle is between 30 and 150 degrees.

The head of the main combustion stage of the central staged combustion chamber provided by the embodiment of the present invention adopts the multi-hole multi-angle fuel injection ring structure. The first sleeve 1 and the second sleeve 2 are sleeved to form the intake passage A. At the same time, the first A first swirl vane 3 and a ring 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 ring 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 sequentially arranged through, and are located at The first through hole 52 on the ring member 5 together forms the first fuel injection channel, through which the fuel is injected into the incoming air flow injected from the air intake channel A, so as to realize the uniform mixing of oil and gas; at the same time, The air channel A and the first fuel injection channel are independent of each other, and the corresponding intake air volume, air intake rate, fuel injection volume, and fuel injection rate can be controlled independently. Therefore, the main combustion stage head of the central staged combustion chamber provided by the present invention adopts the multi-hole multi-angle fuel injection ring structure can effectively ensure the uniformity of oil and gas mixing, and has a simple structure, convenient assembly, facilitates processing, and has low processing cost.

In an optional embodiment, the first swirl blade 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, and the outer wall surface of the first sleeve 1 is provided with a concave portion penetrating in the circumferential direction, and the concave portion is surrounded by the inner wall surface of the first connecting portion 31. 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, and the ring member 5 forms a first oil injection space B through the construction between the second connecting portion 32 and the first connecting portion 31, and the first through hole 52 The position matches the first fuel injection space B.

Specifically, as shown in FIGS. 2 and 3 , the outer wall of the first sleeve 1 is provided with a circumferentially penetrating recess, which is adapted to form a first annular cavity with the inner wall of the first connecting portion 31 4, that is, the oil circuit ring cavity.

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

In another embodiment, as shown in FIG. 3 , a stepped structure is provided between the concave portion and the outermost outer wall surface 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 fixation 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 connection part 32 can be arranged vertically with the first connection part 31, or it can be arranged obliquely, and its function is to act as a swirl vane to guide the gas coming in from the air intake passage A, so that the air flow meets the swirl number required by the design. , At the same time, the dispersion of gas is more uniform, so that the mixing of fuel and 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 facing 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 connecting parts 32 , and the multiple second connecting parts 32 are sequentially arranged along the circumferential direction of the first connecting part 31 .

Specifically, as shown in FIG. 4 , in order to further improve the uniform flow effect of the gas, the second connecting portion 32 , that is, the number of blade bodies can be set in multiples, and the plurality of second connecting portions 32 are arranged along the circumference of the first connecting portion 31 . Arranged sequentially in the direction, they can be arranged in parallel one by one, or a plurality of second connecting parts 32 can be arranged at different angles according to actual needs.

In an optional embodiment, the outer wall 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, a second through hole 53 is also provided on the second ring member 5, and the setting method of the second through hole 53 can refer to the setting method of the first through hole 52 mentioned above, the difference It is only that the first through hole 52 is arranged on the inner wall of the ring 5, and the second through hole 53 is arranged on the outer wall of the ring 5. Those skilled in the art can adapt the second through hole 53 according to the first through hole 52, I won't repeat them here.

The setting position of the second through hole 53 may correspond to that of the first through hole 52, or may be set in a misaligned position, and the specific position may be set according to actual needs.

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 ring member 5 form a second oil injection channel.

In an optional embodiment, the header device of the main combustion stage further includes a second swirl vane 6 ; the second swirl vane 6 is arranged between the second sleeve 2 and the ring member 5 .

Specifically, as shown in Figure 1, a second swirl vane 6 is also provided between the inner wall surface of the second sleeve 2 and the outer wall surface of the ring 5, and the second sleeve 2 is moved by the second swirl vane 6 It is isolated from the space between the ring member 5 to provide an oil injection space for the second oil injection channel.

In an optional embodiment, the second swirl vane 6 includes a third connecting portion 61 and a fourth connecting 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 with the fourth connecting portion 62 and the third connecting portion. A second oil injection space C is formed between the connecting parts 61 , and the position of the second through hole 53 matches the second oil 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 , both being an annular T-shaped structure composed of two connecting parts.

The second swirl blade 6 and the first swirl blade 3 are arranged symmetrically with respect to the ring member 5, that is, the outer wall surface of the third connecting portion 61 is attached to the inner wall surface of the second sleeve 2, and the fourth connecting portion is arranged on the second sleeve 2. 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 isolates the second oil injection space C between the third connecting portion 61 and the ring member 5. The above-mentioned second through hole 53 is arranged toward the second oil injection space C, which can make The fuel enters the second fuel injection space C and mixes with the swirling gas.

The fourth connection part 62 can be vertically arranged with the third connection part 61, and can also be arranged obliquely. Its function is like the second connection part 32, and it is also used as a swirl vane to guide the gas coming in from the air inlet passage A, so that the gas The dispersion of the gas is more uniform, so that the mixture of fuel and gas is more uniform.

Furthermore, 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 arranged in sequence along the circumferential direction of the third connecting portion 61 .

The multiple fourth connecting parts 62 can be arranged in parallel one by one, or can be arranged with different angles according to actual needs. The specific arrangement method is not limited, as long as it can achieve the effect of swirling flow.

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

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 preferably ranges from 10 to 40.

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

In an optional embodiment, the head device of the main combustion stage further includes an oil passage nozzle 7 , and the oil outlet of the oil passage nozzle 7 is connected through 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 on the first swirl vane 3 and the second 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 air intake passage A, the swirl blades can further promote fuel injection into the swirling incoming flow and mix with the gas to form After a certain degree of premixing, the oil and gas mixture enters the combustion chamber to form 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, as the oil injection port, its position, quantity and injection angle can be changed according to actual needs; the deflection angle of the first swirl vane 3 and the second swirl vane The deflection angle of the flow vane 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, thereby adjusting the flame structure of the main combustion stage, and achieving the purpose of low-emission combustion.

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

Specifically, as shown in Figures 2 and 3, in order to prevent the flow separation between the two airflows 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 5 Flow member 8, flow guide member 8 can be tapered structure, also can be trapezoidal structure, can also be other structures that extend outwards from the right side end of annular member 5 gradually from large to small in width, and its structure is not specified. It is limited, it can conduct flow diversion, and realize the effect of circumferential aerodynamic flow uniformity.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than 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 Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; 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 various embodiments of the present invention.

Claims (10)

1. A central staged combustor primary combustion stage head employing a multi-hole multi-angle oil spray ring structure, comprising: the first sleeve, the second sleeve, the first swirl vane and the annular piece;

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 vanes and the annular piece are sequentially arranged in the air inlet channel 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 piece is provided with a second annular cavity, and the first annular cavity and the second annular cavity are both arranged along the axial extension direction of the first sleeve; the first swirl vanes are provided with third annular cavities which are arranged along the radial extending direction of the first sleeve; 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.

2. The main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil jet ring structure as claimed in claim 1, wherein the first swirl vanes comprise a first connection portion and a second connection portion;

the inner wall surface of the first connecting part is sleeved on the outer wall surface of the first sleeve, the outer wall surface of the first sleeve is provided with a circumferentially through concave part, and the concave part and the inner wall surface of the first connecting part are surrounded to form the first annular cavity;

the second connecting portion is connected to the outer wall surface of the first connecting portion, a first oil injection space is formed between the annular piece and the second connecting portion, and the position of the first through hole is matched with the first oil injection space.

3. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 2, wherein the number of the second connecting parts is plural, and the plural second connecting parts are sequentially arranged along the circumferential direction of the first connecting part.

4. The main combustion stage head of the central staged combustion chamber adopting the multi-hole multi-angle oil injection ring structure as claimed in claim 1, wherein the outer wall surface of the annular member is provided with a second through hole, and the first annular cavity, the second annular cavity and the third annular cavity can form a second oil injection channel with the second through hole.

5. The central staged combustor main stage head with a multi-hole multi-angle oil injection ring structure as defined in claim 4, wherein the main stage head assembly further comprises second swirl vanes; the second swirl vanes are disposed between the second sleeve and the annular member.

6. The main combustion stage head of a central staged combustor employing a multi-hole multi-angle oil jet ring structure as defined in claim 5, wherein the second swirl vanes include a third connection portion and a fourth connection portion;

the outer wall surface laminating of third connecting portion is located the telescopic inner wall surface of second, fourth connecting portion connect in the inner wall surface of third connecting portion, the ring piece through with fourth connecting portion with build between the third connecting portion and be formed with the second oil spout space, the position of second through-hole with second oil spout space assorted.

7. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 6, wherein the number of the fourth connecting parts is plural, and the plural fourth connecting parts are sequentially arranged along the circumferential direction of the third connecting part.

8. The main combustion stage head of a central staged combustion chamber employing a multi-hole multi-angle oil injection ring structure as claimed in claim 6, wherein said first through hole and said second through hole are plural; the plurality of first through holes are arranged on the inner side wall of the annular piece along the circumferential direction of the annular piece, and the plurality of second through holes are arranged on the outer side wall of the annular piece along the circumferential direction of the annular piece.

9. The main combustion stage head of a central staged combustion chamber employing a multi-hole multi-angle oil injection ring structure as claimed in claim 1, wherein the main combustion stage head device further comprises an oil way nozzle, and an oil outlet of the oil way nozzle is in through connection with the first annular cavity.

10. The main combustion stage head of the central staged combustion chamber adopting the porous multi-angle oil injection ring structure as claimed in claim 9, wherein the main combustion stage head device further comprises a flow guiding piece, the flow guiding piece is in a ring shape, and the flow guiding piece is connected to one side of the ring piece, which is away from the oil way joint.

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