Hydrogen fuel combustion chamber head

Abstract

The invention provides a hydrogen fuel combustion chamber head which comprises a shell, a pre-combustion stage assembly and a main combustion stage assembly, the shell is provided with an inner cavity, the pre-combustion stage assembly is arranged in the inner cavity, a pre-hydrogen outlet is formed in the pre-combustion stage assembly, and the pre-combustion stage assembly comprises a fixing shaft and a plurality of blades. The multiple blades are arranged on the peripheral side of the fixing shaft at intervals according to a preset installation angle, the main combustion stage assembly is arranged in the inner cavity and arranged on the pre-combustion stage assembly in a sleeving mode, the main combustion stage assembly comprises an air ring and an air collecting piece, the air ring is arranged on the air collecting piece in a sleeving mode, the air ring is provided with multiple main air pipes arranged at intervals in the circumferential direction of the air ring, and each main air pipe comprises an air inlet section and an air outlet section. A main hydrogen outlet is formed in the inner circumferential wall of the tail end of the gas outlet section, and a main hydrogen inlet is formed in the gas collecting piece and communicates with the main hydrogen outlet. The hydrogen fuel combustion chamber head has the advantages of being high in fuel combustion efficiency, low in pollutant emission and the like.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen fuel engines, and in particular to a hydrogen fuel combustion chamber head. Background Art

[0002] As a clean and efficient energy carrier, hydrogen fuel has shown great application potential in the fields of aviation engines, aerospace propulsion systems and ground gas turbines. It can achieve zero carbon emissions during the combustion process, which is of great importance for mitigating climate change and protecting the environment. However, despite the obvious environmental advantages of hydrogen fuel, it still faces many technical challenges in practical applications, 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 under high temperature conditions to produce nitrogen oxides (NOx), which are pollutants harmful 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 of the invention

[0003] The invention provides a hydrogen fuel combustion chamber head, which is used to solve the defect of high nitrogen oxide emission in the prior art and reduce the emission of nitrogen oxide.

[0004] The present invention provides a hydrogen fuel combustion chamber head, comprising: a housing having an inner cavity; a pre-combustion stage assembly, the pre-combustion stage assembly being 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 interval on the outer peripheral side of the fixed shaft, so that the air passing through the blades and the hydrogen flowing out of the hydrogen outlet are mixed to form a first swirl rotating along a first circumferential direction; A main combustion stage assembly, wherein 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 an air ring and an air collecting member, the air ring is sleeved on the air collecting member, the air ring is provided with a plurality of main air pipes arranged at intervals along its circumference, each of the main air pipes comprises an air inlet section and an air outlet section, a main hydrogen outlet is provided on the inner circumferential wall at the end of the air outlet section, a main hydrogen inlet is provided on the air collecting member, and the main hydrogen inlet is connected to the main hydrogen outlet.

[0005] 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 axis, and on a first projection plane perpendicular to the axial direction of the fixed axis, 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 vortex rotating along a second circumferential direction, and the second circumferential direction is opposite to the rotation direction of the first circumferential direction.

[0006] In some embodiments, the plurality of 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.

[0007] In some embodiments, a plurality of annular main hydrogen supply pipes are provided in the air ring, and the plurality of main hydrogen supply pipes correspond one-to-one to the plurality of groups of main air pipes, and each main hydrogen supply pipe is connected to the main hydrogen outlet on the same group of main air pipes.

[0008] In some embodiments, the gas ring is provided with a plurality of auxiliary hydrogen supply pipes extending radially thereof, each of the auxiliary hydrogen supply pipes is connected to the plurality of main hydrogen supply pipes, and the outer peripheral surface of the gas collecting component is provided with a plurality of intermediate openings arranged at intervals, and the plurality of intermediate openings correspond one-to-one to and are connected to the plurality of auxiliary hydrogen supply pipes.

[0009] In some embodiments, a main annular inner cavity is provided in the gas collecting piece, and the gas collecting piece includes a first end face perpendicular to the axial direction of the fixed axis, and the first end face is arranged adjacent to the gas inlet section relative to the gas outlet section. The first end face is provided with a plurality of main hydrogen inlets arranged at intervals along its circumference, and the main hydrogen inlet is connected to the middle port through the main annular inner cavity.

[0010] In some embodiments, the pre-combustion stage assembly includes a sleeve, the sleeve is sleeved outside the fixed shaft, the sleeve and the fixed shaft define an annular pre-combustion stage channel, and the blades are arranged in the pre-combustion stage channel.

[0011] In some embodiments, the fixed shaft includes an inlet end and an outlet end arranged opposite to each other in its extension direction, and 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 inlet end of the fixed shaft relative to the second end, a plurality of intermediate pipes extending along its axial direction 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 both connected to the intermediate pipe.

[0012] In some embodiments, a pre-annular inner cavity is provided in the second end of the sleeve, and the intermediate inlet, the intermediate pipeline, the pre-annular inner cavity and the pre-hydrogen outlet are connected in sequence.

[0013] In some embodiments, an in-shaft pipe extending along the axial direction of the fixed shaft is provided in the air inlet end of the fixed shaft, and a plurality of blades are each provided with a blade pipe extending along the radial direction of the fixed shaft, one end of the plurality of blade pipes corresponds one-to-one to and is connected with a plurality of intermediate pipes, and one end of the plurality of blade pipes are each connected with the in-shaft pipe.

[0014] The hydrogen fuel combustion chamber head of the embodiment of the present invention mixes hydrogen with air in the pre-combustion stage assembly, and mixes hydrogen with air in the main combustion stage assembly, so that hydrogen and air are evenly 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 of the embodiment of the present invention has the advantages of high fuel combustion efficiency and low pollutant emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the hydrogen fuel combustion chamber head provided by the present invention.

[0017] Figure 2 It is a front view schematic diagram of the head of the hydrogen fuel combustion chamber provided by the present invention.

[0018] Figure 3 It is a schematic cross-sectional view of the head of the hydrogen fuel combustion chamber provided by the present invention.

[0019] Figure 4 It is a schematic diagram of the explosion of the head of the hydrogen fuel combustion chamber provided by the present invention.

[0020] Figure 5 It is a schematic cross-sectional view of the head of the hydrogen fuel combustion chamber provided by the present invention at the main hydrogen supply pipe and the auxiliary hydrogen supply pipe.

[0021] Figure 6 It is a schematic diagram of the internal passage of the gas ring at the head of the hydrogen fuel combustion chamber provided by the present invention.

[0022] Reference numerals: 1. Shell; 2. Pre-combustion stage assembly; 21. Pre-hydrogen outlet; 22. Fixed shaft; 221. Inner shaft pipe; 23. Blades; 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. Air 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 part; 321. Main hydrogen inlet; 322. Intermediate port; 323. Main annular inner cavity; 324. First end face. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Combine the following Figure 1-Figure 6 The hydrogen fuel combustion chamber head of the present invention includes a housing 1, a pre-combustion stage assembly 2 and a main combustion stage assembly 3.

[0025] The housing 1 has an inner cavity.

[0026] The pre-combustion stage assembly 2 is arranged in the inner cavity, and a pre-hydrogen outlet 21 is provided on the pre-combustion stage assembly 2. The pre-combustion stage assembly 2 includes a fixed shaft 22 and a plurality of blades 23. The plurality of blades 23 are arranged on the outer peripheral side of the fixed shaft 22 at preset installation angle intervals so that the air passing through the blades 23 and the hydrogen flowing out of the hydrogen outlet are mixed to form a first vortex rotating along a first circumferential direction.

[0027] 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 includes an air ring 31 and an air collecting piece 32. The air ring 31 is sleeved on the air collecting piece 32. The air ring 31 is provided with a plurality of main air pipes 311 arranged at intervals along its circumference. Each main air pipe 311 includes an air inlet section 3111 and an air outlet section 3112. A main hydrogen outlet 314 is provided on the inner peripheral wall at the end of the air outlet section 3112. A main hydrogen inlet 321 is provided on the air collecting piece 32. The main hydrogen inlet 321 is connected to the main hydrogen outlet 314.

[0028] For example, in order to make the technical solution of the present application easier to understand, the following takes the axial direction of the fixed shaft 22 as an example to further describe the technical solution of the present application, where the front-to-back direction is as follows: Figure 3 shown.

[0029] 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 provided with a pre-combustion stage assembly 2, a gas collecting member 32, an air ring 31 and a shell 1 from the inside to the outside.

[0030] The fixed shaft 22 extends in the front-to-back direction, and a plurality of blades 23 are disposed on the fixed shaft 22. The plurality of blades 23 are fixedly connected to the fixed shaft 22, for example, by welding. The plurality of blades 23 are arranged according to a preset installation angle, so that after the air input by the compressor passes through the blades 23, a first swirl can be gradually formed, and the plurality of air streams are mixed with the hydrogen flowing out of the pre-hydrogen outlet 21 and converged together to form a first swirl rotating along a first circumferential direction. The first circumferential direction is as follows: Figure 3 As shown, Figure 2 In the clockwise direction.

[0031] The main air pipe 311 runs through the air ring 31, and a main air inlet 3113 is provided at the front end of the main air pipe 311, and a main air outlet 3114 is provided at the rear end of the main air pipe 311. The front end of the main air pipe 311 is an air intake section 3111, and the rear end of the main air pipe 311 is an air outlet section 3112. Air enters the air intake 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.

[0032] A main hydrogen outlet 314 is provided on the inner peripheral wall at the rear end of the air outlet section 3112. Hydrogen enters the air collecting part 32 from the main hydrogen inlet 321, and then flows out from the main hydrogen outlet 314 on the main air pipe 311, and at the same time mixes with the air in the main air pipe 311 to form a second vortex.

[0033] The flow direction of the second swirl flow may be the same as or opposite to that of the first swirl flow.

[0034] The hydrogen fuel combustion chamber head of the embodiment of the present invention mixes hydrogen with air in the pre-combustion stage component 2, and mixes hydrogen with air in the main combustion stage component 3, so that hydrogen and air are evenly 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 of the embodiment of the present invention has the advantages of high fuel combustion efficiency and low pollutant emissions.

[0035] 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, and the air inlet section 3111 extends along the axial direction of the fixed shaft 22. On the 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 vortex rotating along a second circumferential direction, and the second circumferential direction is opposite to the first circumferential direction.

[0036] For example, Figure 6 As shown, the center line of the main air pipe 311 is not a straight line, the center line of the air inlet section 3111 intersects with the center line of the air outlet section 3112, the air inlet section 3111 extends in the front-to-back direction, and the air outlet section 3112 is inclined.

[0037] The projection of the center line of the gas outlet section 3112 is perpendicular to the radial direction of the main combustion stage assembly 3 . In other words, the projection line of the gas outlet section 3112 on the first projection plane is tangent to the projection line of the contour of the outer peripheral surface of the main combustion stage assembly 3 .

[0038] Moreover, the inclination direction of the center line of the air outlet section 3112 makes the air flow out of the air outlet section 3112 form a second swirl flow rotating in the second circumferential direction. Figure 3 As shown, Figure 2 In the counterclockwise direction.

[0039] Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present invention makes the air outlet section 3112 of the main air pipe 311 inclined so that the flow direction of the second vortex is opposite to that of the first vortex, which is not only beneficial to the mutual mixing of fuels but also beneficial to the stability of the flame.

[0040] In some embodiments, the plurality of main air pipes 311 form a plurality of groups along 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.

[0041] For example, Figure 1 and Figure 2 As shown, each group of main air pipes 311 is arranged on the same annular circumferential surface, and multiple groups of main air pipes 311 are arranged in sequence in the radial direction of the main combustion stage assembly 3, for example, 2 groups, 3 groups, 4 groups or 5 groups.

[0042] Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present invention can ensure uniform air distribution by using multiple groups of main air pipes 311, thereby improving combustion efficiency.

[0043] In some embodiments, a plurality of annular main hydrogen supply pipes 312 are provided in the air ring 31 , and 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 is connected to the main hydrogen outlet 314 on the same group of main air pipes 311 .

[0044] A plurality of main hydrogen supply pipes 312 are provided inside the gas ring 31 , and the number of the main hydrogen supply pipes 312 is the same as the number of the main air pipes 311 .

[0045] A plurality of main hydrogen supply pipes 312 are arranged in sequence and spaced apart along the radial direction of the main combustion stage assembly 3, and 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 the 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.

[0046] Therefore, the hydrogen fuel combustion chamber head of the embodiment of the present invention allows hydrogen to be distributed to each main air pipe 311, ensuring sufficient mixing of hydrogen and air.

[0047] In some embodiments, a plurality of auxiliary hydrogen supply pipes 313 extending radially thereof are provided in the gas ring 31, and each auxiliary hydrogen supply pipe 313 is connected to a plurality of main hydrogen supply pipes 312. A plurality of intermediate openings 322 arranged at intervals are provided on the outer peripheral surface of the gas collecting member 32, and the plurality of intermediate openings 322 correspond one-to-one to and are connected to the plurality of auxiliary hydrogen supply pipes 313.

[0048] For example, Figure 5 As shown, the auxiliary hydrogen supply pipe 313 ensures that hydrogen can be transported to each main hydrogen supply pipe 312, and then transported to each main hydrogen supply pipe 312. A plurality of 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 ranges from 2 to 8, for example, 2, 6 or 8 auxiliary hydrogen supply pipes 313 are provided.

[0049] The outer circumferential surface of the gas collecting piece 32 is fitted with the inner circumferential surface of the air ring 31, and the inlet of the auxiliary hydrogen supply pipe 313 is arranged on the inner circumferential surface of the air ring 31. A plurality of intermediate ports 322 are provided on the outer circumferential surface of the gas collecting piece 32. The number and positions of the intermediate ports 322 are the same as those of the inlet of the auxiliary hydrogen supply pipe 313. After hydrogen is gathered in the gas collecting piece 32, it enters the auxiliary hydrogen supply pipe 313 through the intermediate ports 322, and then enters each main hydrogen supply pipe 312, and finally flows out through the main hydrogen outlet 314 to mix with the air in the main air pipe 311.

[0050] In some embodiments, a main annular inner cavity 323 is provided in the gas collecting piece 32, and the gas collecting piece 32 includes a first end face 324 which is perpendicular to the axial direction of the fixed shaft 22 and is arranged adjacent to the gas inlet section 3111 relative to the gas outlet section 3112, and a plurality of main hydrogen inlets 321 are arranged at intervals along its circumference on the first end face 324, and the main hydrogen inlets 321 are connected to the middle port 322 through the main annular inner cavity 323.

[0051] For example, Figure 1 As shown, the front end face of the gas collector 32 is a first end face 324, and a plurality of main hydrogen inlets 321 are provided on the first end face 324, and the number of the main hydrogen inlets 321 is 2 to 6, such as 2, 4 or 6. The hydrogen in the main annular inner cavity 323 enters the auxiliary hydrogen supply pipe 313 through the middle opening 322.

[0052] A main annular inner cavity 323 is provided inside the gas collecting member 32, and the main hydrogen inlet 321 is connected to the main annular inner cavity 323. Hydrogen enters the main annular inner cavity 323 from the main hydrogen inlet 321. Due to the annular structure of the main annular inner cavity 323, hydrogen can flow circumferentially in the main annular inner cavity 323, thereby achieving 360-degree uniform distribution. This not only avoids the phenomenon of excessively high or low local hydrogen concentration, but also ensures that each main hydrogen supply pipe 312 can obtain a stable and consistent hydrogen supply, which is conducive to maintaining the uniformity and stability of combustion.

[0053] In some embodiments, the pre-combustion stage assembly 2 includes a sleeve 24, which is sleeved outside the fixed shaft 22, and the sleeve 24 and the fixed shaft 22 define an annular pre-combustion stage channel, and the blades 23 are arranged in the pre-combustion stage channel.

[0054] For example, Figure 3 As shown, a plurality of blades 23 are arranged inside the pre-combustion stage passage, and these blades 23 are evenly distributed on the outer peripheral side of the fixed shaft 22 according to a predetermined installation angle. When the air delivered by the compressor passes through these blades 23, the flow direction of the air changes from the front-to-back direction to a preset angle D1, and is mixed with the hydrogen flowing out of the pre-hydrogen outlet 21 to form a first swirl rotating along the first circumferential direction.

[0055] In some embodiments, the fixed shaft 22 includes an air inlet end and an air outlet end arranged relatively to each other in its extension direction, and the sleeve 24 has a first end and a second end arranged relatively to each other in the axial direction of the fixed shaft 22, and the first end is arranged adjacent to the air inlet end of the fixed shaft 22 relative to the second end, and a plurality of intermediate pipes 241 extending along its axial direction are arranged in the sleeve 24, a plurality of intermediate inlets 242 are arranged on the inner circumferential wall of the first end of the sleeve 24, and a plurality of pre-hydrogen outlets 21 are arranged on the inner circumferential surface of the second end of the sleeve 24, and the intermediate inlets 242 and the pre-hydrogen outlets 21 are both connected to the intermediate pipes 241.

[0056] For example, 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.

[0057] The inner wall of the sleeve 24 is provided with a plurality of intermediate pipes 241 extending in the left-right direction, the inner circumferential wall at the front end of the sleeve 24 is provided with a plurality of intermediate inlets 242, and the inner circumferential wall at 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, and one intermediate inlet 242 is connected to one pre-hydrogen outlet 21 through one intermediate pipe 241.

[0058] Optionally, the number of the intermediate inlet 242 , the intermediate pipeline 241 and the pre-hydrogen outlet 21 is 2 to 8, for example, 2, 6 or 8.

[0059] 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 channel. The pre-combustion stage channel provides a dedicated space for the initial mixing of hydrogen and air, ensuring full 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 blades 23.

[0060] In some embodiments, a pre-annular inner cavity 243 is provided in the second end of the sleeve 24 , and the middle inlet 242 , the middle pipe 241 , the pre-annular inner cavity 243 and the pre-hydrogen outlet 21 are connected in sequence.

[0061] like Figure 3 As shown, the inner circumference of the second end of the sleeve 24 protrudes inwardly so that a pre-annular inner cavity 243 is set therein, and the hydrogen entering the intermediate pipe 241 from the intermediate inlet 242 is evenly mixed in the pre-annular inner cavity 243 and then flows out from the pre-hydrogen outlet 21.

[0062] In the hydrogen fuel combustion chamber head of the embodiment of the present invention, when hydrogen enters the middle pipe 241 from the middle inlet 242 and then flows into the pre-annular inner cavity 243, it can be fully mixed in the pre-annular inner cavity 243. This design ensures that hydrogen can be evenly distributed before entering the pre-combustion stage channel, reducing the phenomenon of excessively high or low local hydrogen concentration.

[0063] Optionally, a plurality of pre-hydrogen outlets 21 are provided, and the plurality of pre-hydrogen outlets 21 are all in communication with the pre-annular inner cavity 243 .

[0064] Optionally, the wall surface of the pre-hydrogen outlet 21 is set to a chamfered surface 244, so that the hydrogen flowing out of the pre-hydrogen outlet 21 is ejected obliquely backward instead of being ejected along the radial direction of the sleeve 24. The design of oblique backward injection can effectively guide the flow direction of the hydrogen, so that it can better interact with the air after passing through the blades 23 to form a first vortex.

[0065] In some embodiments, an in-shaft pipe 221 extending along the axial direction of the fixed shaft 22 is provided in the air intake end of the fixed shaft 22, and a blade pipe 231 extending along the radial direction of the fixed shaft 22 is provided in each of the multiple blades 23. One end of the multiple blade pipes 231 corresponds one-to-one to and is connected with the multiple intermediate pipes 241, and one end of the multiple blade pipes 231 is connected with the in-shaft pipe 221.

[0066] For example, Figure 3 As shown, the blade ducts 231 extend in the radial direction of the fixed shaft 22 , and one blade duct 231 is communicated with one middle duct 241 .

[0067] An inner shaft pipe 221 extending in the front-to-back direction is provided at the front end of the fixed shaft 22. After the hydrogen enters the inner shaft pipe 221, it flows to a plurality of blade pipes 231 respectively, then flows to a plurality of intermediate pipes 241, and then enters the pre-annular inner cavity 243. After being evenly dispersed in the pre-annular inner cavity 243, it flows out through the pre-hydrogen outlet 21 and mixes with the air in the pre-combustion stage channel to form a first vortex.

[0068] The specific working process of the hydrogen fuel combustion chamber head of the embodiment of the present invention is described below: In the pre-combustion stage assembly 2, after the hydrogen enters from the inner shaft pipe 221, it is divided into each blade pipe 231, and then reaches the pre-annular cavity 243 after passing through the intermediate pipe 241. After the hydrogen is evenly dispersed in the pre-annular cavity 243, it flows out through the pre-hydrogen outlet 21. The air enters the pre-combustion stage channel, and then passes through the blade 23 and mixes with the hydrogen to form the first swirl.

[0069] In the main combustion stage assembly 3, hydrogen enters the main annular inner cavity 323 from the main hydrogen inlet 321 of the gas collecting member 32, and after being initially evenly distributed in the main annular inner cavity 323, flows to the auxiliary hydrogen supply pipe 313 through the middle port 322, and then reaches the main hydrogen supply pipe 312, and then flows from the main hydrogen outlet 314 to the main air pipe 311; 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 forms a second vortex after mixing with hydrogen.

[0070] The hydrogen fuel combustion chamber head of the embodiment of the present invention adopts two-stage swirls with opposite swirl directions, and hydrogen and air are pre-mixed in each stage of swirl, so that the fuel can significantly reduce pollutant emissions while ensuring efficient combustion, and improve the stability and reliability of the combustion process.

[0071] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen fuel combustion chamber head, characterized in that: include: a housing having an inner cavity; a pre-combustion stage assembly, the pre-combustion stage assembly being 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 interval on the outer peripheral side of the fixed shaft, so that the air passing through the blades and the hydrogen flowing out of the hydrogen outlet are mixed to form a first swirl rotating along a first circumferential direction; A main combustion stage assembly, wherein 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 an air ring and an air collecting member, the air ring is sleeved on the air collecting member, the air ring is provided with a plurality of main air pipes arranged at intervals along its circumference, each of the main air pipes comprises an air inlet section and an air outlet section, a main hydrogen outlet is provided on the inner circumferential wall at the end of the air outlet section, a main hydrogen inlet is provided on the air collecting member, and the main hydrogen inlet is connected to the main hydrogen outlet.

2. The hydrogen fuel combustion chamber head according to claim 1, characterized in that: The center line of the air inlet section and the center line of the air outlet section are arranged at an angle, and the air inlet section extends along the axial direction of the fixed axis. On a first projection plane perpendicular to the axial direction of the fixed axis, 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 vortex rotating along a second circumferential direction, and the second circumferential direction is opposite to the rotation direction of the first circumferential direction.

3. The hydrogen fuel combustion chamber head according to claim 1, characterized in that: The plurality of main air pipes form 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.

4. The hydrogen fuel combustion chamber head according to claim 3, characterized in that: A plurality of annular main hydrogen supply pipes are arranged in the air ring, and the plurality of main hydrogen supply pipes correspond one to one with the plurality of groups of main air pipes, and each main hydrogen supply pipe is connected with the main hydrogen outlet on the same group of main air pipes.

5. The hydrogen fuel combustion chamber head according to claim 4, characterized in that: The gas ring is provided with a plurality of auxiliary hydrogen supply pipes extending radially thereof, each of the auxiliary hydrogen supply pipes is connected with the plurality of main hydrogen supply pipes, the outer peripheral surface of the gas collecting member is provided with a plurality of intermediate openings arranged at intervals, and the plurality of intermediate openings correspond to and are connected with the plurality of auxiliary hydrogen supply pipes one by one.

6. The hydrogen fuel combustion chamber head according to claim 5, characterized in that: A main annular inner cavity is provided in the gas collecting component, and the gas collecting component includes a first end face perpendicular to the axial direction of the fixed axis, the first end face is arranged adjacent to the gas inlet section relative to the gas outlet section, and a plurality of main hydrogen inlets are arranged at intervals along the circumference thereof, and the main hydrogen inlets are connected to the middle port through the main annular inner cavity.

7. The hydrogen fuel combustion chamber head according to claim 1, characterized in that: The pre-combustion stage assembly comprises a sleeve, the sleeve is sleeved outside the fixed shaft, the sleeve and the fixed shaft define an annular pre-combustion stage channel, and the blades are arranged in the pre-combustion stage channel.

8. The hydrogen fuel combustion chamber head according to claim 7, characterized in that: The fixed shaft includes an air inlet end and an air outlet end which are arranged opposite to each other in the extension direction thereof; the sleeve includes a first end and a second end which are 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 thereof 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; the intermediate inlets and the pre-hydrogen outlets are both connected to the intermediate pipes.

9. The hydrogen fuel combustion chamber head according to claim 8, characterized in that: A pre-annular inner cavity is provided in the second end of the sleeve, and the middle inlet, the middle pipeline, the pre-annular inner cavity and the pre-hydrogen outlet are connected in sequence.

10. The hydrogen fuel combustion chamber head according to claim 7, characterized in that: An in-shaft pipe extending along the axial direction of the fixed shaft is provided in the air inlet end of the fixed shaft, and blade pipes extending along the radial direction of the fixed shaft are provided in each of the plurality of blades. One end of each of the plurality of blade pipes corresponds to and is connected with a plurality of intermediate pipes one by one, and one end of each of the plurality of blade pipes is connected with the in-shaft pipe.

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