A hydrogen fuel combustion chamber head

Abstract

The application provides a hydrogen fuel combustion chamber head, which comprises an outer shell, a pre-combustion stage assembly and a main combustion stage assembly, the outer shell has an inner cavity, the pre-combustion stage assembly is arranged in the inner cavity, the pre-combustion stage assembly is provided with a pre-hydrogen outlet, the pre-combustion stage assembly comprises a fixed shaft and a plurality of blades, the plurality of blades are arranged at an outer circumferential side of the fixed shaft at a preset installation angle, the main combustion stage assembly is arranged in the inner cavity and is sleeved on the pre-combustion stage assembly, the main combustion stage assembly comprises a gas ring and a gas collecting piece, the gas ring is sleeved on the gas collecting piece, the gas ring is provided with a plurality of main air pipes which are arranged at a circumferential direction of the gas ring, each main air pipe comprises an air inlet section and an air outlet section, an inner circumferential wall at a tail end of the air outlet section is provided with a main hydrogen outlet, the gas collecting piece is provided with a main hydrogen inlet, and the main hydrogen inlet is communicated with the main hydrogen outlet. The hydrogen fuel combustion chamber head has the advantages of high fuel combustion efficiency, low pollutant emission and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen fuel engine, in particular to a hydrogen fuel combustion chamber head. BACKGROUND

[0002] Hydrogen fuel, as a clean and efficient energy carrier, has shown great potential for application in fields such as aircraft engines, aerospace propulsion systems, and ground gas turbines. It can achieve zero carbon emissions during the combustion process, which is of great importance in mitigating climate change and protecting the environment. However, despite the obvious environmental advantages of hydrogen fuel, it still faces many technical challenges in practical application, especially in terms of combustion characteristics in the combustion chamber. Although hydrogen combustion itself does not produce carbon dioxide, under traditional combustion methods, hydrogen reacts with nitrogen in the air to form nitrogen oxides (NOx) at high temperatures, which is a harmful pollutant to the environment. Nitrogen oxides are one of the main components of acid rain and photochemical smog, and long-term exposure to high levels of NOx can also have adverse effects on human health. SUMMARY

[0003] The present application provides a hydrogen fuel combustion chamber head to solve the problem of high nitrogen oxide emissions in the prior art and reduce nitrogen oxide emissions.

[0004] The present application provides a hydrogen fuel combustion chamber head, comprising:

[0005] an outer shell having an inner cavity;

[0006] a pre-combustion stage assembly arranged in the inner cavity, the pre-combustion stage assembly being provided with a pre-hydrogen outlet, the pre-combustion stage assembly comprising a fixed shaft and a plurality of blades, the plurality of blades being arranged at a preset installation angle on the outer circumferential side of the fixed shaft to form a first rotational flow along a first circumferential direction after mixing air passing through the blades with hydrogen flowing out of the hydrogen outlet;

[0007] a main combustion stage assembly arranged in the inner cavity and sleeved on the pre-combustion stage assembly, the main combustion stage assembly comprising a gas ring and a gas collector, the gas ring being sleeved on the gas collector, the gas ring being provided with a plurality of main air pipes arranged at intervals along the circumferential direction thereof, each main air pipe comprising an air inlet section and an air outlet section, an inner circumferential wall at the end of the air outlet section being provided with a main hydrogen outlet, the gas collector being provided with a main hydrogen inlet, the main hydrogen inlet being in communication with the main hydrogen outlet.

[0008] In some embodiments, the center line of the air inlet section and the center line of the air outlet section are arranged at an angle, the air inlet section extends along the axial direction of the fixed shaft, in a first projection plane perpendicular to the axial direction of the fixed shaft, the projection of the center line of the air outlet section is perpendicular to the radial direction of the main combustion stage assembly, and the airflow flowing out of the air outlet section can form a second rotational flow rotating along a second circumferential direction, the second circumferential direction being opposite to the rotating direction of the first circumferential direction.

[0009] In some embodiments, a plurality of the main air pipes are arranged in a plurality of groups along the radial direction of the main combustion stage assembly, and the main air pipes in the same group are arranged on the same circumferential surface.

[0010] In some embodiments, a plurality of annular main hydrogen supply pipes are arranged in the gas ring, and each of the main hydrogen supply pipes corresponds to a group of the main air pipes, and each of the main hydrogen supply pipes is in communication with the main hydrogen outlet on the main air pipe in the same group.

[0011] In some embodiments, a plurality of auxiliary hydrogen supply pipes extending along the radial direction of the gas ring are arranged in the gas ring, each of the auxiliary hydrogen supply pipes is in communication with the main hydrogen supply pipes, and a plurality of intermediate ports are arranged on the outer circumferential surface of the gas collecting member at intervals, the plurality of intermediate ports correspond to and are in communication with the plurality of auxiliary hydrogen supply pipes.

[0012] In some embodiments, a main annular inner cavity is arranged in the gas collecting member, the gas collecting member comprises a first end surface perpendicular to the axial direction of the fixed shaft, the first end surface is arranged adjacent to the air inlet section relative to the air outlet section, and a plurality of main hydrogen inlets are arranged on the first end surface at intervals along the circumferential direction of the first end surface, the main hydrogen inlets are in communication with the intermediate ports through the main annular inner cavity.

[0013] In some embodiments, the pre-combustion stage assembly comprises a sleeve, the sleeve is sleeved on the fixed shaft, the sleeve and the fixed shaft define an annular pre-combustion stage passage, and the vane is arranged in the pre-combustion stage passage.

[0014] In some embodiments, the fixed shaft comprises an air inlet end and an air outlet end arranged opposite to each other in the extension direction of the fixed shaft, the sleeve has a first end and a second end arranged opposite to each other in the axial direction of the fixed shaft, the first end is arranged adjacent to the air inlet end of the fixed shaft relative to the second end, a plurality of intermediate pipes extending along the axial direction of the sleeve are arranged in the sleeve, a plurality of intermediate inlets are arranged on the inner circumferential wall of the first end of the sleeve, a plurality of pre-hydrogen outlets are arranged on the inner circumferential surface of the second end of the sleeve, and the intermediate inlets and the pre-hydrogen outlets are in communication with the intermediate pipes.

[0015] In some embodiments, a pre-annular inner cavity is arranged in the second end of the sleeve, and the intermediate inlets, the intermediate pipes, the pre-annular inner cavity, and the pre-hydrogen outlets are sequentially in communication.

[0016] In some embodiments, an inner shaft pipe extending along the axial direction of the fixed shaft is arranged in the air inlet end of the fixed shaft, each of the plurality of vanes is provided with a vane pipe extending along the radial direction of the fixed shaft, one end of each of the plurality of vane pipes corresponds to and communicates with one of the plurality of intermediate pipes, and one end of each of the plurality of vane pipes communicates with the inner shaft pipe.

[0017] The hydrogen fuel combustion chamber head of the embodiment of the present application mixes hydrogen and air in the pre-combustion stage assembly and mixes hydrogen and air in the main combustion stage assembly, so that the hydrogen and air are uniformly mixed. This design not only effectively improves the combustion efficiency, but also reduces the generation of harmful substances such as nitrogen oxides. Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present application has the advantages of high fuel combustion efficiency and low pollutant emission. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0019] Figure 1 is a structural schematic diagram of the hydrogen fuel combustion chamber head provided by the present application.

[0020] Figure 2 is a front view schematic diagram of the hydrogen fuel combustion chamber head provided by the present application.

[0021] Figure 3 is a sectional view schematic diagram of the hydrogen fuel combustion chamber head provided by the present application.

[0022] Figure 4 is an explosion schematic diagram of the hydrogen fuel combustion chamber head provided by the present application.

[0023] Figure 5 is a sectional view schematic diagram of the hydrogen fuel combustion chamber head provided by the present application at the main hydrogen supply pipe and the auxiliary hydrogen supply pipe.

[0024] Figure 6 is a schematic diagram of the internal passage of the gas ring of the hydrogen fuel combustion chamber head provided by the present application.

[0025] Reference signs:

[0026] 1, housing; 2, pre-combustion stage assembly; 21, pre-hydrogen outlet; 22, fixed shaft; 221, shaft inner pipe; 23, blade; 231, blade pipe; 24, sleeve; 241, intermediate pipe; 242, intermediate inlet; 243, pre-annular inner cavity; 244, chamfered surface; 3, main combustion stage assembly; 31, gas ring; 311, main air pipe; 3111, air inlet section; 3112, air outlet section; 3113, main air inlet; 3114, main air outlet; 312, main hydrogen supply pipe; 313, auxiliary hydrogen supply pipe; 314, main hydrogen outlet; 32, gas collecting member; 321, main hydrogen inlet; 322, intermediate port; 323, main annular inner cavity; 324, first end surface. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] The hydrogen fuel combustion chamber head of the present application will be described below with reference to the drawings. Figures 1-6 The hydrogen fuel combustion chamber head of the present application comprises a housing 1, a pre-combustion stage assembly 2 and a main combustion stage assembly 3.

[0029] The housing 1 has an inner cavity.

[0030] The pre-combustion stage assembly 2 is arranged in the inner cavity, and the pre-combustion stage assembly 2 is provided with a pre-hydrogen outlet 21. The pre-combustion stage assembly 2 comprises a fixed shaft 22 and a plurality of blades 23. The plurality of blades 23 are arranged at a preset installation angle on the outer circumferential side of the fixed shaft 22 and are spaced apart from each other. The air passing through the blades 23 and the hydrogen gas flowing out of the hydrogen outlet are mixed to form a first rotational flow along a first circumferential direction.

[0031] The main combustion stage assembly 3 is arranged in the inner cavity and is sleeved on the pre-combustion stage assembly 2. The main combustion stage assembly 3 comprises a gas ring 31 and a gas collecting member 32. The gas ring 31 is sleeved on the gas collecting member 32. The gas ring 31 is provided with a plurality of main air pipes 311 arranged along the circumferential direction of the gas ring 31. Each main air pipe 311 comprises an air inlet section 3111 and an air outlet section 3112. The inner circumferential wall of the end of the air outlet section 3112 is provided with a main hydrogen outlet 314. The gas collecting member 32 is provided with a main hydrogen inlet 321. The main hydrogen inlet 321 is in communication with the main hydrogen outlet 314.

[0032] For example, in order to make the technical solutions of the present application easier to be understood, the axial direction of the fixed shaft 22 is taken as an example to further describe the technical solutions of the present application, wherein the front-rear direction is as shown in the drawings. Figure 3

[0033] ​The front end of the hydrogen fuel combustion chamber head is provided with a compressor, and the rear end of the hydrogen fuel combustion chamber head is provided with a flame tube. The hydrogen fuel combustion chamber head is sequentially provided with a pre-combustion stage assembly 2, a gas collecting member 32, an air ring 31 and an outer shell 1 from inside to outside.

[0034] The fixed shaft 22 extends in the front-rear direction, and a plurality of blades 23 are arranged on the fixed shaft 22 and fixedly connected to the fixed shaft 22, for example, by welding. The plurality of blades 23 are arranged at a preset installation angle, so that the air input by the compressor can gradually form a first rotational flow after passing through the blades 23, and a plurality of air streams mix with the hydrogen gas flowing out of the pre-hydrogen gas outlet 21 and converge together to form a first rotational flow rotating along a first circumferential direction. Figure 3 Figure 2 The first circumferential direction is clockwise in the drawing.

[0035] The main air pipe 311 penetrates through the air ring 31, the front end of the main air pipe 311 is provided with a main air inlet 3113, the rear end of the main air pipe 311 is provided with a main air outlet 3114, the front end of the main air pipe 311 is an air inlet section 3111, and the rear end of the main air pipe 311 is an air outlet section 3112. The air enters the air inlet section 3111 from the main air inlet 3113, and then flows out from the main air outlet 3114 after passing through the air outlet section 3112.

[0036] The inner circumferential wall of the rear end of the air outlet section 3112 is provided with a main hydrogen gas outlet 314. The hydrogen gas enters the gas collecting member 32 from the main hydrogen gas inlet 321, and then flows out from the main hydrogen gas outlet 314 on the main air pipe 311, and mixes with the air in the main air pipe 311 to form a second rotational flow.

[0037] The flow direction of the second rotational flow can be the same as or opposite to that of the first rotational flow.

[0038] The hydrogen fuel combustion chamber head of the embodiment can mix hydrogen gas and air in the pre-combustion stage assembly 2, and mix hydrogen gas and air in the main combustion stage assembly 3, so that the hydrogen gas and the air are uniformly mixed. This design can not only effectively improve the combustion efficiency, but also reduce the generation of harmful substances such as nitrogen oxides. Therefore, the hydrogen fuel combustion chamber head has the advantages of high fuel combustion efficiency and low pollutant emission.

[0039] In some embodiments, the center line of the air inlet section 3111 and the center line of the air outlet section 3112 are arranged at an angle, the air inlet section 3111 extends along the axial direction of the fixed shaft 22, and in a first projection plane perpendicular to the axial direction of the fixed shaft 22, the projection of the center line of the air outlet section 3112 is perpendicular to the radial direction of the main combustion stage assembly 3, and the airflow flowing out of the air outlet section 3112 can form a second rotational flow rotating along a second circumferential direction, and the second circumferential direction is opposite to the rotation direction of the first circumferential direction.

[0040] For example, as shown in​Figure 6 As shown, the center line of the main air pipe 311 is not straight, the center line of the air inlet section 3111 and the center line of the air outlet section 3112 intersect, the air inlet section 3111 extends in the front-rear direction, and the air outlet section 3112 is obliquely arranged.

[0041] The projection of the center line of the air outlet section 3112 is perpendicular to the radial direction of the main combustion stage assembly 3, in other words, the projection line of the air outlet section 3112 on the first projection plane is tangent to the projection line of the profile of the outer circumferential surface of the main combustion stage assembly 3.

[0042] Moreover, the oblique direction of the center line of the air outlet section 3112 is such that the airflow flowing out of the air outlet section 3112 forms a second circumferential rotation second rotational flow, the second circumferential rotation is counterclockwise as shown in Figure 3 Figure 2

[0043] Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present application is advantageous not only in the mutual mixing of the fuel, but also in the stability of the flame, by making the air outlet section 3112 of the main air pipe 311 oblique, so that the flow direction of the second rotational flow is opposite to that of the first rotational flow.

[0044] In some embodiments, a plurality of main air pipes 311 form a plurality of groups in the radial direction of the main combustion stage assembly 3, and the main air pipes 311 in the same group are arranged on the same circumferential surface.

[0045] For example, as shown in Figure 1 and Figure 2 Each group of main air pipes 311 is arranged on the same annular circumferential surface, and a plurality of groups of main air pipes 311, for example, 2 groups, 3 groups, 4 groups, or 5 groups, etc., are arranged in the radial direction of the main combustion stage assembly 3.

[0046] Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present application can ensure uniform distribution of air by using a plurality of groups of main air pipes 311, thereby improving the combustion efficiency.

[0047] In some embodiments, a plurality of annular main hydrogen supply pipes 312 are arranged in the gas ring 31, the plurality of main hydrogen supply pipes 312 correspond one-to-one to the plurality of groups of main air pipes 311, and each main hydrogen supply pipe 312 communicates with the main hydrogen outlet 314 in the same group of main air pipes 311.

[0048] A plurality of main hydrogen supply pipes 312 are arranged in the interior of the gas ring 31, and the number of main hydrogen supply pipes 312 is consistent with the number of main air pipes 311.

[0049] ​​Multiple main hydrogen supply pipes 312 are arranged radially and spaced apart from each other along the main combustion stage assembly 3. Each main hydrogen supply pipe 312 is responsible for supplying hydrogen to a group of main air pipes 311 and is connected to all main hydrogen outlets 314 on that group of main air pipes 311. In other words, each main hydrogen outlet 314 on the same group of main air pipes 311 is connected through the same main hydrogen supply pipe 312.

[0050] Thus, the hydrogen fuel combustion chamber head of this embodiment of the invention allows hydrogen to be distributed to each main air pipe 311, ensuring sufficient mixing of hydrogen and air.

[0051] In some embodiments, the gas ring 31 is provided with a plurality of auxiliary hydrogen supply pipes 313 extending radially therein, each auxiliary hydrogen supply pipe 313 being connected to a plurality of main hydrogen supply pipes 312, and the outer peripheral surface of the gas collecting member 32 is provided with a plurality of spaced intermediate ports 322, the plurality of intermediate ports 322 being corresponding to and connected to the plurality of auxiliary hydrogen supply pipes 313.

[0052] For example, such as Figure 5 As shown, the auxiliary hydrogen supply pipe 313 ensures that hydrogen can be delivered to each main hydrogen supply pipe 312, and then to each main hydrogen supply pipe 312. Multiple auxiliary hydrogen supply pipes 313 are arranged at intervals along the circumference of the gas ring 31, and the number of auxiliary hydrogen supply pipes 313 can be 2 to 8, for example, there are 2, 6 or 8 auxiliary hydrogen supply pipes 313.

[0053] The outer peripheral surface of the gas collecting component 32 is in contact with the inner peripheral surface of the gas ring 31. The inlet of the auxiliary hydrogen supply pipe 313 is located on the inner peripheral surface of the gas ring 31. The outer peripheral surface of the gas collecting component 32 is provided with multiple intermediate ports 322. The number and position of the intermediate ports 322 are the same as the inlet of the auxiliary hydrogen supply pipe 313. After the hydrogen is collected in the gas collecting component 32, it enters the auxiliary hydrogen supply pipe 313 through the intermediate ports 322, and then enters each main hydrogen supply pipe 312. Finally, it flows out through the main hydrogen outlet 314 and mixes with the air in the main air pipe 311.

[0054] In some embodiments, the gas collecting member 32 is provided with a main annular inner cavity 323. The gas collecting member 32 includes a first end face 324 that is perpendicular to the axial direction of the fixed shaft 22 and adjacent to the inlet section 3111 relative to the outlet section 3112. The first end face 324 is provided with a plurality of main hydrogen inlets 321 arranged at intervals along its circumference. The main hydrogen inlets 321 are connected to the intermediate port 322 through the main annular inner cavity 323.

[0055] For example, such as Figure 1 As shown, the front end face of the gas collecting component 32 is the first end face 324, and the first end face 324 is provided with multiple main hydrogen inlets 321. The number of main hydrogen inlets 321 is 2 to 6, for example, 2, 4 or 6. The hydrogen in the main annular inner cavity 323 enters the auxiliary hydrogen supply pipe 313 through the intermediate port 322.

[0056] The gas collecting unit 32 has a main annular cavity 323 inside, and the main hydrogen inlet 321 is connected to the main annular cavity 323. Hydrogen enters the main annular cavity 323 from the main hydrogen inlet 321. Due to the annular structure of the main annular cavity 323, the hydrogen can flow circumferentially within the main annular cavity 323, thereby achieving a uniform 360-degree distribution. This not only avoids the phenomenon of excessively high or low local hydrogen concentrations, but also ensures that each main hydrogen supply pipe 312 receives a stable and consistent hydrogen supply, which is beneficial to maintaining the uniformity and stability of combustion.

[0057] In some embodiments, the pre-combustion stage assembly 2 includes a sleeve 24 sleeved outside a fixed shaft 22, the sleeve 24 and the fixed shaft 22 defining an annular pre-combustion stage channel, and a blade 23 disposed within the pre-combustion stage channel.

[0058] For example, such as Figure 3 As shown, multiple blades 23 are disposed inside the pre-combustion stage channel, and these blades 23 are evenly distributed on the outer periphery of the fixed shaft 22 at a predetermined installation angle. When the air supplied by the compressor passes through these blades 23, the airflow direction changes from the front-to-back direction to a preset angle D1, and mixes with the hydrogen flowing out from the pre-hydrogen outlet 21 to form a first vortex rotating in the first circumferential direction.

[0059] In some embodiments, the fixed shaft 22 includes an inlet end and an outlet end arranged opposite to each other in its extending direction. The sleeve 24 has a first end and a second end arranged opposite to each other in the axial direction of the fixed shaft 22. The first end is disposed adjacent to the inlet end of the fixed shaft 22 relative to the second end. The sleeve 24 is provided with a plurality of intermediate pipes 241 extending along its axial direction. The inner peripheral wall of the first end of the sleeve 24 is provided with a plurality of intermediate inlets 242. The inner peripheral surface of the second end of the sleeve 24 is provided with a plurality of pre-hydrogen outlets 21. The intermediate inlets 242 and the pre-hydrogen outlets 21 are all connected to the intermediate pipes 241.

[0060] For example, such as Figure 3 As shown, the front end of the fixed shaft 22 is the air inlet end, the rear end of the fixed shaft 22 is the air outlet end, the front end of the sleeve 24 is the first end, and the rear end of the sleeve 24 is the second end.

[0061] The inner wall of the sleeve 24 is provided with a plurality of intermediate pipes 241 extending in the left and right direction. The inner peripheral wall of the front end of the sleeve 24 is provided with a plurality of intermediate inlets 242, and the inner peripheral wall of the rear end of the sleeve 24 is provided with a plurality of pre-hydrogen outlets 21. The number of intermediate inlets 242, intermediate pipes 241 and pre-hydrogen outlets 21 is the same. One intermediate inlet 242 is connected to one pre-hydrogen outlet 21 through one intermediate pipe 241.

[0062] Optionally, the number of intermediate inlets 242, intermediate pipes 241, and pre-hydrogen outlets 21 can be 2 to 8, for example, 2, 6, or 8.

[0063] Hydrogen enters the intermediate pipe 241 from the intermediate inlet 242, and then flows out from the pre-hydrogen outlet 21 to mix with the air in the pre-combustion stage passage. The pre-combustion stage passage provides a dedicated space for the initial mixing of hydrogen and air, ensuring sufficient contact and uniform mixing of the two. The design of the sleeve 24 not only enhances the stability of the structure, but also provides an ideal environment for the installation of the vanes 23.

[0064] In some embodiments, the second end of the sleeve 24 is provided with a pre-annular inner cavity 243, and the intermediate inlet 242, the intermediate pipe 241, the pre-annular inner cavity 243, and the pre-hydrogen outlet 21 are sequentially communicated.

[0065] As shown in Figure 3 , the inner circumferential surface of the second end of the sleeve 24 is inwardly convex so as to provide the pre-annular inner cavity 243 inside it. Hydrogen entering the intermediate pipe 241 from the intermediate inlet 242 is mixed uniformly in the pre-annular inner cavity 243 and then flows out from the pre-hydrogen outlet 21.

[0066] The head of the hydrogen fuel combustion chamber of the embodiment of the present application can fully mix hydrogen when it flows into the pre-annular inner cavity 243 after entering the intermediate pipe 241 from the intermediate inlet 242. This design ensures that hydrogen is uniformly distributed before entering the pre-combustion stage passage, reducing the phenomenon of excessive or insufficient local hydrogen concentration.

[0067] Optionally, the pre-hydrogen outlet 21 is provided with a plurality of pre-hydrogen outlets 21, and the plurality of pre-hydrogen outlets 21 are all in communication with the pre-annular inner cavity 243.

[0068] Optionally, the wall surface of the pre-hydrogen outlet 21 is chamfered 244, so that the hydrogen flowing out of the pre-hydrogen outlet 21 is sprayed obliquely backward, rather than radially along the sleeve 24. The oblique backward spraying design can effectively guide the flow direction of hydrogen, so that it better interacts with the air after passing through the vanes 23 to form the first rotational flow.

[0069] In some embodiments, the intake end of the fixed shaft 22 is provided with an axial inner pipe 221 extending along the fixed shaft 22, and each of the plurality of vanes 23 is provided with a vane pipe 231 extending radially along the fixed shaft 22. One end of each of the plurality of vane pipes 231 corresponds to and communicates with one of the plurality of intermediate pipes 241, and one end of each of the plurality of vane pipes 231 communicates with the axial inner pipe 221.

[0070] For example, as shown in Figure 3 , the vane pipe 231 extends radially along the fixed shaft 22, and one vane pipe 231 communicates with one intermediate pipe 241.

[0071] The front end of the fixed shaft 22 is internally provided with an axial pipe 221 extending in the front-rear direction, and the hydrogen gas enters the axial pipe 221 and then flows to a plurality of blade pipes 231, and then flows to a plurality of intermediate pipes 241, and then enters a pre-annular inner cavity 243, and after being uniformly dispersed in the pre-annular inner cavity 243, flows out through a pre-hydrogen gas outlet 21 and mixes with the air in the pre-combustion stage passage to form a first rotational flow.

[0072] The specific working process of the hydrogen fuel combustion chamber head of the embodiment of the present application will be introduced below.

[0073] In the pre-combustion stage assembly 2, the hydrogen gas enters from the axial pipe 221 and is then distributed to each blade pipe 231, and then passes through the intermediate pipe 241 to reach the pre-annular inner cavity 243, and after being uniformly dispersed in the pre-annular inner cavity 243, flows out through the pre-hydrogen gas outlet 21. The air enters the pre-combustion stage passage, and then passes through the blade 23 to mix with the hydrogen gas to form a first rotational flow.

[0074] In the main combustion stage assembly 3, the hydrogen gas enters the main annular inner cavity 323 from the main hydrogen gas inlet 321 of the gas collecting member 32, and after being preliminarily uniformly distributed in the main annular inner cavity 323, flows to the auxiliary hydrogen supply pipe 313 through the intermediate port 322, and then reaches the main hydrogen supply pipe 312, and then flows to the main air pipe 311 from the main hydrogen gas outlet 314; the air enters the main air pipe 311 from the air inlet section 3111 of the main air pipe 311, and then enters the air outlet section 3112 and mixes with the hydrogen gas to form a second rotational flow.

[0075] The hydrogen fuel combustion chamber head of the embodiment of the present application adopts two-stage rotational flow with opposite rotational directions, and the hydrogen gas and the air are mixed in each stage of rotational flow in advance, so that the fuel can be combusted efficiently while significantly reducing pollutant emissions, and the stability and reliability of the combustion process are improved.

[0076] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part 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 embodiments of the present application.

Claims

1. A hydrogen fuel combustion chamber head, characterized in that, include: The outer casing has an inner cavity; A pre-combustion stage assembly is disposed in the inner cavity and has a pre-hydrogen outlet. The pre-combustion stage assembly includes a fixed shaft and multiple blades. The multiple blades are arranged at preset installation angles on the outer periphery of the fixed shaft so that the air passing through the blades and the hydrogen flowing out from the hydrogen outlet are mixed to form a first vortex rotating in the first circumferential direction. A main combustion stage assembly is disposed in the inner cavity and sleeved on the pre-combustion stage assembly. The main combustion stage assembly includes a gas ring and a gas collecting element. The gas ring is sleeved on the gas collecting element. The gas ring is provided with a plurality of main air pipes arranged at intervals along its circumference. Each main air pipe includes an inlet section and an outlet section. The inner circumferential wall at the end of the outlet section is provided with a main hydrogen outlet. The gas collecting element is provided with a main hydrogen inlet. The main hydrogen inlet is connected to the main hydrogen outlet. The centerline of the intake section and the centerline of the outlet section are arranged at an angle. The intake section extends along the axial direction of the fixed shaft. On a first projection plane perpendicular to the axial direction of the fixed shaft, the projection of the centerline of the outlet section is perpendicular to the radial direction of the main combustion stage assembly. The airflow flowing out of the outlet section can form a second vortex rotating in a second circumferential direction, which is opposite to the rotation direction of the first circumferential direction.

2. The hydrogen fuel combustion chamber head according to claim 1, characterized in that, Multiple main air pipes are arranged in groups along the radial direction of the main combustion stage assembly, and the main air pipes in the same group are arranged on the same circumferential surface.

3. The hydrogen fuel combustion chamber head according to claim 2, characterized in that, The gas ring is provided with multiple annular main hydrogen supply pipes, and each of the multiple main hydrogen supply pipes corresponds to a set of main air pipes. Each main hydrogen supply pipe is connected to the main hydrogen outlet on the same set of main air pipes.

4. The hydrogen fuel combustion chamber head according to claim 3, characterized in that, The gas ring is provided with a plurality of auxiliary hydrogen supply pipes extending radially therein. Each of the auxiliary hydrogen supply pipes is connected to a plurality of the main hydrogen supply pipes. The outer circumferential surface of the gas collecting component is provided with a plurality of spaced intermediate ports. Each of the intermediate ports corresponds to and is connected to a plurality of the auxiliary hydrogen supply pipes.

5. The hydrogen fuel combustion chamber head according to claim 4, characterized in that, The gas collecting component has a main annular inner cavity. The gas collecting component includes a first end face that is perpendicular to the axial direction of the fixed shaft. The first end face is disposed opposite the gas outlet section and adjacent to the gas inlet section. The first end face is provided with a plurality of main hydrogen inlets arranged at intervals along its circumference. The main hydrogen inlets are connected to the intermediate port through the main annular inner cavity.

6. The hydrogen fuel combustion chamber head according to claim 1, characterized in that, The pre-combustion stage assembly includes a sleeve fitted over the fixed shaft, the sleeve and the fixed shaft defining an annular pre-combustion stage channel, and the blade disposed within the pre-combustion stage channel.

7. The hydrogen fuel combustion chamber head according to claim 6, characterized in that, The fixed shaft includes an inlet end and an outlet end arranged opposite to each other in its extending direction. The sleeve has a first end and a second end arranged opposite to each other in the axial direction of the fixed shaft. The first end is disposed adjacent to the inlet end of the fixed shaft relative to the second end. The sleeve is provided with a plurality of intermediate pipes extending along its axial direction. The inner peripheral wall of the first end of the sleeve is provided with a plurality of intermediate inlets. The inner peripheral surface of the second end of the sleeve is provided with a plurality of pre-hydrogen outlets. The intermediate inlets and pre-hydrogen outlets are all connected to the intermediate pipes.

8. The hydrogen fuel combustion chamber head according to claim 7, characterized in that, The second end of the sleeve is provided with a pre-annular inner cavity, and the intermediate inlet, the intermediate pipe, the pre-annular inner cavity and the pre-hydrogen outlet are connected in sequence.

9. The hydrogen fuel combustion chamber head according to claim 6, characterized in that, The fixed shaft has an internal pipe extending axially along the fixed shaft at its air inlet end. Each of the multiple blades has a blade pipe extending radially along the fixed shaft. One end of each of the multiple blade pipes corresponds to and is connected to a multiple intermediate pipe. One end of each of the multiple blade pipes is connected to the internal pipe.

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