CN117053234A - Tower type coaxial grading combustion chamber head - Google Patents
Tower type coaxial grading combustion chamber head Download PDFInfo
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- CN117053234A CN117053234A CN202310837647.9A CN202310837647A CN117053234A CN 117053234 A CN117053234 A CN 117053234A CN 202310837647 A CN202310837647 A CN 202310837647A CN 117053234 A CN117053234 A CN 117053234A
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- cyclone
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 177
- 239000000446 fuel Substances 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 13
- 238000000889 atomisation Methods 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 45
- 239000007789 gas Substances 0.000 description 11
- 239000000295 fuel oil Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000002679 ablation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/30—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising fuel prevapourising devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a tower type coaxial grading combustion chamber head, which comprises a main fuel pipe, a duty stage primary cyclone, a duty stage secondary cyclone, a main combustion stage primary tower cyclone and a main combustion stage secondary tower cyclone which are sequentially arranged from inside to outside in a central annular mode, wherein a duty stage oil path is arranged between the main fuel pipe and the duty stage primary cyclone, a duty stage air atomizing nozzle is arranged at the tail end of the duty stage oil path, a main combustion stage primary oil path is arranged between the main fuel pipe and the main combustion stage primary tower cyclone, a plurality of main combustion stage primary air atomizing nozzles are connected to the main combustion stage primary oil path through a main combustion stage primary oil collecting ring, a main combustion stage secondary oil path is arranged between the main fuel pipe and the main combustion stage secondary tower cyclone, and a plurality of main combustion stage secondary air atomizing nozzles are connected to the main combustion stage secondary oil path through a main combustion stage secondary oil collecting ring. The invention has the advantages of multistage cyclone and multiple fuel supply paths, better atomization effect, reduced pollutant discharge and improved outlet temperature distribution uniformity.
Description
Technical Field
The invention relates to a combustion chamber head, in particular to a tower type coaxial grading combustion chamber head, and belongs to the field of ship gas turbines.
Background
The design goal of current marine gas turbines has been shifted from single pursuing high efficiency to pursuing high efficiency and low pollution, and reducing pollutant emissions has become a key impetus for the development of gas turbine combustors. The development of gas turbines is gradually proceeding toward environmental protection. The aviation environmental protection Committee (CAEP) established by the International Civil Aviation Organization (ICAO) sets a plurality of pollutant emission standards, and strict regulations are set for the emission of various pollutants, which puts higher demands on the design of the combustion chamber of the ship gas turbine. The combustion chamber is an important part of the processes of main pollutant emission, fuel atomization, oil-gas mixing, chemical reaction and the like of the gas turbine, and the main combustion area of the head is the key of researching the combustion chamber. At present, the atomization characteristics of fuel oil have great influence when the existing combustion chamber head is used under different working conditions, the temperature distribution of the combustion chamber is uneven, the pollutant discharge amount is high, and the air flow state of the combustion zone and the backflow zone are not controlled by the air flow of the head.
Disclosure of Invention
The invention aims to solve the problems that the atomization characteristic of fuel oil has larger influence, the temperature distribution of a combustion chamber is uneven, the pollutant discharge amount is high, the air flow state of the combustion zone and the reflux zone are not controlled by the air flow of the head when the burner is used under different working conditions, and can efficiently atomize, blend and effectively organize the swirler of the main combustion zone of the combustion chamber, thereby providing a tower type coaxial grading combustion chamber head.
The technical scheme adopted by the invention for solving the problems is as follows:
the utility model provides a tower coaxial hierarchical combustion chamber head, including total fuel pipe and be the annular class of on duty one-level swirler of arranging in proper order from inside to outside, on duty one-level swirler, main fire one-level tower swirler and main fire one-level tower swirler, be equipped with the class of oil circuit between total fuel pipe and the class of on duty one-level swirler, be equipped with class of air atomizing nozzle and be located class of one-level swirler on duty on the end of class of oil circuit, be equipped with main fire one-level oil circuit between total fuel pipe and the main fire one-level swirler, main fire one-level oil circuit is connected with a plurality of main fire one-level air atomizing nozzles through main fire one-level oil collection ring, a plurality of main fire one-level air atomizing nozzles are installed in main fire one-level swirler inboard, air circuit has been seted up in main fire one-level nozzle department, be equipped with venturi between main fire one-level tower swirler and the class of on duty one-level swirler, main fire one-level tower swirler and main fire one-level swirler intercommunication, be equipped with main fire one-level two-level oil circuit between total fuel pipe and the main fire one-level tower one-level swirler, main fire one-level oil circuit is connected with a plurality of main fire one-level air atomizing nozzles through main fire one-level two-level oil collection rings.
Further, the main second-stage tower swirler that fires includes the outer wall, the second grade is main fires the wheel hub, the main second-stage blade that fires that sets up between outer wall internal surface and second grade is main fires the wheel hub surface, the first air inlet channel is constituteed with the second grade main fires the wheel hub to main fires second-stage first-stage blade that fires including the first-stage main fires the wheel hub, the main first-stage blade that fires of setting between first-stage main fires the wheel hub surface and second-stage main fires the wheel hub internal surface, the second air inlet channel is constituteed with the first-stage main fires the wheel hub to main fires the first-stage blade that fires of constituteing with the first-stage, the second-stage swirler that duty includes the second-stage on-duty wheel hub, the second-stage blade that duty and second-stage on-duty wheel hub constitute the third air inlet channel with the second-stage on-duty wheel hub internal surface, the first-stage blade that duty and the first-stage on-duty are constituteed with the fourth air inlet channel.
Further, the number of the on-duty first-stage blades, the on-duty second-stage blades, the main combustion first-stage blades and the main combustion second-stage blades is respectively a plurality of the on-duty first-stage blades, and the plurality of the blades are uniformly distributed along the circumference of the hub connected with the on-duty second-stage blades.
Further, the first-stage blade, the second-stage blade, the first-stage blade and the second-stage blade are curved and have the same rotation direction.
Further, the main combustion stage secondary blades are obliquely arranged, and the included angles between the main combustion stage secondary blades and the horizontal plane are the same.
Further, a rotational flow cover is connected to the first-stage on-duty hub.
Further, a step structure is arranged between the duty-level second-level blade and the main combustion-level first-level blade.
Further, a cooling hole is formed in the step structure.
Further, the number of the cooling holes is several, and the cooling holes are uniformly distributed on the top surface of the step structure.
Furthermore, the on-duty air atomizing nozzle is a rotational flow cup type air atomizing nozzle.
The beneficial effects of the invention are as follows:
1. through setting up of total fuel pipe, on duty level oil circuit, main level second grade oil circuit, main level first grade oil circuit and main fuel on-the-fly oil collection ring, can be to participating in the nozzle quantity of fuel feeding according to different operating mode fuel flow adjustment for the operating mode is excessively stable, guarantees better fuel atomization effect.
2. The four-stage cyclone is formed by the arrangement of the on-duty stage primary cyclone, the on-duty stage secondary cyclone, the main combustion stage primary tower cyclone and the main combustion stage secondary tower cyclone, the four-stage cyclone is all involved in the formation of a central backflow area, the turbulence intensity in the backflow area is high, the fuel and the air entering the backflow area are quickly mixed, the breaking and evaporation of fuel drops are promoted, and the fuel-air mixing performance is improved.
3. Through the arrangement of the venturi, most of fuel oil sprayed out by the duty nozzle forms an oil film on the inner wall surface of the venturi, and secondary atomization is carried out under the action of swirl air; the venturi tube also has the function of preventing backfire, avoids the high-temperature gas backflow ablation nozzle on duty, and can avoid carbon deposition at the upstream of the venturi tube and the fuel nozzle.
4. Through the setting of whirl cover, make the effect position of on duty extremely two-stage whirl air and fuel spraying at the expansion section of venturi as far as possible, the rectification effect that plays.
5. Through the arrangement of the step structure, the coupling between the class and the main combustion stage airflow and the combustion performance are ensured.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the embodiment of fig. 1.
FIG. 3 is a schematic diagram of the structure of one embodiment of the class of the present invention.
FIG. 4 is a schematic structural view of one embodiment of the main combustion stage of the present invention.
FIG. 5 is a schematic view of the assembled structure of the present invention and a combustion chamber;
in the figure: 1. a total fuel pipe; 2. duty-level two-stage cyclone; 3. a step structure; 4. a main combustion stage two-stage tower type cyclone; 1-1, an on-duty oil circuit; 1-2, a primary combustion stage secondary oil way; 1-3, a primary oil way of a main combustion stage; 2-1, an on-duty class rotational flow cup type air atomizing nozzle; 2-2, venturi; 2-3, a class-on-duty first-stage blade; 2-4, a duty-level second-level blade; 4-1, a primary air atomizing nozzle of a main combustion stage; 4-2, a primary combustion stage secondary air atomizing nozzle; 4-3, primary combustion stage primary blade; 4-4, a main combustion stage secondary blade.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1-5, as shown in fig. 1-5, the tower type coaxial staged combustion chamber head of the embodiment comprises a main fuel pipe 1, and a duty stage primary cyclone, a duty stage secondary cyclone, a main combustion stage primary tower cyclone and a main combustion stage secondary tower cyclone which are sequentially arranged from inside to outside in a central annular shape, wherein the main combustion stage secondary tower cyclone comprises an outer wall, a secondary main combustion hub, a main combustion stage secondary blade 4-4 arranged between the inner surface of the outer wall and the outer surface of the secondary main combustion hub, the main combustion stage secondary blade 4-4 and the secondary main combustion hub form a first air inlet channel, the main combustion stage one-stage tower type cyclone comprises a one-stage main combustion hub and main combustion first-stage blades arranged between the outer surface of the one-stage main combustion hub and the inner surface of the secondary main combustion hub, the main combustion first-stage blades and the one-stage main combustion hub form a second air inlet channel, the duty stage secondary cyclone comprises a secondary duty hub and duty stage second-stage blades 2-4 arranged between the inner surface of the one-stage main combustion hub and the outer surface of the secondary duty hub, the duty stage second-stage blades 2-4 and the secondary duty hub form a third air inlet channel, and the duty stage one-stage cyclone comprises a primary duty hub and duty stage first-stage blades 2-3 arranged between the outer surface of the primary duty hub and the inner surface of the secondary duty hub, and the duty stage first-stage blades 2-3 and the primary duty hub form a fourth air inlet channel. The head is enabled to obtain better fuel atomization effect through the multi-shear layer formed by the four-stage rotational flow formed under the combined action of the passages formed by the class-level first-stage blade 2-3, the duty-level second-stage blade 2-4, the main combustion-level first-stage blade 4-3, the main combustion-level second-stage blade 4-4 and the inner hub thereof, and a larger air inlet area is obtained.
An on-duty oil way 1-1 is arranged between the total fuel pipe 1 and the on-duty primary cyclone, and an on-duty air atomizing nozzle is arranged at the tail end of the on-duty oil way 1-1 and is positioned at the inner side of the on-duty primary blade 2-3 by adopting a cyclone cup type air atomizing nozzle, so that better atomizing effect is convenient to obtain. A main combustion stage primary oil way 1-3 is arranged between the main combustion stage primary tower type cyclone and the main combustion stage primary oil way 1-3 is connected with a plurality of main combustion stage primary air atomizing nozzles 4-1 through a main combustion stage primary oil collecting ring, the plurality of main combustion stage primary air atomizing nozzles 4-1 are arranged on the inner side of the main combustion stage primary tower type cyclone, the preferential plurality of main combustion stage primary air atomizing nozzles 4-1 are positioned on the downstream of a second air inlet channel formed by a main combustion first stage blade and a primary main combustion hub and uniformly distributed on the wall of the main combustion stage primary tower type cyclone along the same circumference taking the center of the main combustion stage primary tower type cyclone as the center of a circle, and the number of the main combustion stage primary air atomizing nozzles 4-1 is twelve, so that better atomizing effect can be obtained conveniently. A main combustion secondary oil way 1-2 is arranged between the main combustion oil pipe 1 and the main combustion secondary tower type cyclone, the main combustion secondary oil way 1-2 is connected with a plurality of main combustion secondary air atomizing nozzles 4-2 through a main combustion secondary oil collecting ring, and the plurality of main combustion secondary air atomizing nozzles 4-2 are arranged on the inner side of the main combustion secondary tower type cyclone. The plurality of primary combustion secondary air atomizing nozzles 4-2 are uniformly distributed on the inclined wall surface of the primary combustion secondary tower type cyclone along the same circumference taking the center of the primary combustion secondary tower type cyclone as the center of the circle, and the number of the primary combustion secondary air atomizing nozzles 4-2 is preferably twelve, so that better atomizing effect can be conveniently obtained. In order to ensure that the engine has good performance parameters in the variable working condition process, the main combustion stage adopts a two-way oil supply mode, the main combustion stage secondary oil circuit 1-2 and the main combustion stage primary oil circuit 1-3 are respectively supplied with oil through two independent oil collecting rings, and preferably, the oil collecting ring mounting position is reserved at the head part of the tower type coaxial grading combustion chamber, and can be in an oil collecting ring groove structure, so that the oil collecting rings are convenient to mount. The main combustion stage two-stage tower type cyclone is connected to a main oil way through two independent oil collecting rings, and is connected with annular atomization nozzles which are uniformly distributed at multiple points to supply oil to the flow channel, and two-stage fuel oil is atomized in a transverse jet flow mode and mixed with air to atomize main combustion stage air. An air passage is formed at the primary air atomizing nozzle 4-1 of the main combustion stage, and auxiliary atomizing air is introduced to make the air sprayed out from the annular nozzle surrounding the fuel oil so as to deepen the penetration depth of the fuel oil. An air circuit is arranged at the primary air atomizing nozzle 4-1 of the main combustion stage, and excessive auxiliary atomizing air can influence the swirl flow field structure. A venturi tube 2-2 is arranged between the primary combustion stage primary tower type cyclone and the duty stage secondary cyclone, the primary combustion stage primary tower type cyclone is communicated with the venturi tube 2-2, in the air atomization process of the duty stage cyclone cup type fuel nozzle, a small part of liquid drops are directly broken into fine fuel liquid drop particles after collision with the wall surface of the venturi tube 2-2, most of fuel sprayed by the duty stage nozzle is formed into an oil film on the inner wall surface of the venturi tube 2-2, and secondary atomization is carried out under the action of cyclone air. In addition, because the main combustion stage adopts a lean oil premixed combustion mode, the flame is a partially premixed flame, and the backfire phenomenon is very easy to occur. Therefore, the venturi tube 2-2 type outlet structure design is adopted at the main combustion stage outlet, the throat is approximately at the outlet position, the airflow speed at the throat is maximum, and the possibility of tempering is reduced. Meanwhile, the high-temperature gas backflow ablation nozzle on duty is avoided, and carbon deposition at the upstream of the venturi tube 2-2 and the fuel nozzle can be avoided. When the tower type coaxial grading combustion chamber is applied to the head, the whole device is in a lean oil combustion mode, a three-level oil supply mode is adopted, and the equivalent ratio distribution of each level is gradually reduced from the inner layer to the outer layer. Because the fuel flow is lower under the low working condition, if all the nozzles participate in the fuel supply, the single-nozzle fuel flow is smaller, the fuel injection speed is reduced, and the atomization characteristic of the fuel is affected. Therefore, the number of the nozzles participating in oil supply needs to be adjusted according to the fuel flow under different working conditions. When the working condition is reduced again, the main combustion secondary nozzles are all closed, only the duty-stage swirl cup type air atomizing nozzles 2-1 and the main combustion primary nozzles work, and when the working condition is excessive to a slow vehicle working condition, the main combustion secondary nozzles are all closed, and only the duty-stage swirl cup type air atomizing nozzles 2-1 participate in oil injection. The multistage oil supply mode realizes stable transition of the working condition of the combustion chamber, improves the condition that the atomization mixing effect of the cyclone is reduced because of the reduction of the fuel flow in the low working condition, can automatically select the number of nozzles and the distribution of the nozzles participating in the work according to the working condition, and greatly improves the oil supply flexibility of the head of the tower type coaxial graded combustion chamber.
The number of the class-level first-stage blades 2-3, the class-level second-stage blades 2-4, the main combustion stage first-stage blades 4-3 and the main combustion stage second-stage blades 4-4 is respectively a plurality of the blades, and the plurality of the blades are uniformly distributed along the circumference of the hubs connected with the blades. The number of the blades should have proper overlapping degree, more blades can increase friction loss of air flow, less blades can generate light transmission phenomenon, and the air flow is led to be directly communicated, so that the swirl effect is weakened, and the formation of a backflow area and the stability of combustion are not facilitated. The class-level first-stage blade, the class-level second-stage blade, the main combustion-stage first-stage blade and the main combustion-stage second-stage blade are curved and have the same rotation direction, the curved-surface blades have better effects in controlling the air flow direction, and the curved-surface blades are adopted in each stage of blades in consideration of the integrated design of the class-level cyclone and the air atomizing nozzle. Different spiral direction combination modes are used for influencing the combustion flow field structure, in order to ensure the momentum and the spiral flow effect of the air flow at the outlet of the main combustion stage, the blades of the duty stage two-stage cyclone and the main combustion stage two-stage cyclone are combined in the same spiral direction, and the spiral directions of the main combustion stage blades and the duty stage blades are the same.
The main combustion stage secondary blades 4-4 are obliquely arranged, the included angles between the main combustion stage secondary blades 4-4 and the horizontal plane are the same, the main combustion stage secondary blades 4-4 and the central axis of the main combustion stage secondary tower type cyclone are in a certain angle, the size of the oblique angle has a certain influence on the mixing performance of the cyclone, the smaller the oblique angle is, the smaller the airflow turning angle is, but the value of the oblique angle is moderate, preferably 10-60 degrees, the air inlet has an oblique radial angle, downstream air upstream movement can be restrained, tempering is restrained, and the pressure loss is smaller.
The rotational flow cover is connected to the hub on duty of the first stage, and the rotational flow cover is connected to the hub between the first stage and the second stage, so that the action position of the two-stage rotational flow air and the fuel spray is as far as possible in the expansion section of the venturi tube 2-2, and a certain rectification effect is achieved.
A step structure 3 is arranged between the class-level second-stage blade 2-4 and the main combustion stage first-stage blade 4-3, and the top surface of the step structure 3 is perpendicular to the axis of the duty-level cyclone and is used for coupling the duty-level cyclone and the main combustion stage airflow and improving the combustion performance.
The step structure 3 is provided with a plurality of cooling holes, the cooling holes are uniformly distributed on the step top surface of the step structure 3, and the preferred step structure 3 is provided with 3 rows of cooling holes which are distributed on the periphery Xiang Junyun, so that step ablation is prevented.
The head of the tower type coaxial grading combustion chamber adopts a combustion mode of air grading and fuel grading, and as the combustion chamber cancels main combustion holes and mixing holes distributed on the flame tube, combustion air is completely participated by head air inlet. After the class fuel is sprayed out from the nozzle, the temperature gradually rises for a short distance to finish evaporation and start combustion, the front end of combustion flame is positioned at the expansion section of the venturi tube 2-2, and the class is in a diffusion combustion mode. The primary air atomizing nozzle 4-1 of the primary combustion stage and the secondary air atomizing nozzle of the primary combustion stage are sprayed out in the premixing section to be mixed with air to form a uniform oil-gas mixture, fuel oil gas is accelerated by the venturi tube 2-2 of the primary combustion stage, pushed out into the flame tube by the swirl flow field and burnt by high-temperature fuel gas, and the primary combustion stage is partially premixed combustion. Under the combined action of the head value class and the main combustion stage, the temperature of the combustion area of the tower type graded lean premixed combustion chamber is lower, the temperature distribution is uniform, and the area of the high temperature area is smaller. The amount of thermal NOx produced is therefore much reduced. In practical application, the head is arranged on the annular tube combustion chamber, so that the mixing quality of fuel oil and air can be improved well, pollutant discharge amount of the combustion chamber is reduced by organizing combustion in a lean oil partially premixing mode, and uniformity of outlet temperature distribution is improved.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a tower coaxial hierarchical combustion chamber head which characterized in that: comprises a main fuel pipe (1) and a duty-stage first-stage cyclone, a duty-stage second-stage cyclone, a main-stage first-stage tower cyclone and a main-stage second-stage tower cyclone which are sequentially arranged from inside to outside in a central annular mode, a duty-stage oil path (1-1) is arranged between the main fuel pipe (1) and the duty-stage first-stage cyclone, a duty-stage air atomizing nozzle is arranged at the tail end of the duty-stage oil path (1-1) and is positioned in the duty-stage first-stage cyclone, a main-stage first-stage oil path (1-3) is arranged between the main fuel pipe (1) and the main-stage tower cyclone, the main-stage first-stage oil path (1-3) is connected with a plurality of main-stage first-stage air atomizing nozzles (4-1) through a main-stage first-stage oil collecting ring, a plurality of main combustion stage primary air atomizing nozzles (4-1) are arranged on the inner side of a main combustion stage primary tower type cyclone, an air circuit is arranged at the main combustion stage primary air atomizing nozzle, a venturi (2-2) is arranged between the main combustion stage primary tower type cyclone and a duty stage secondary cyclone, the main combustion stage primary tower type cyclone is communicated with the venturi (2-2), a main combustion stage secondary oil circuit (1-2) is arranged between a main combustion oil pipe (1) and the main combustion stage secondary tower type cyclone, the main combustion stage secondary oil circuit (1-2) is connected with a plurality of main combustion stage secondary air atomizing nozzles (4-2) through a main combustion stage secondary oil collecting ring, a plurality of primary secondary air atomizing nozzles (4-2) are arranged on the inner side of the primary secondary tower type cyclone.
2. The tower coaxial staged combustor head as defined in claim 1, wherein: the main combustion stage second-level tower type cyclone comprises an outer wall, a second-level main combustion hub and main combustion stage second-level blades arranged between the inner surface of the outer wall and the outer surface of the second-level main combustion hub, the main combustion stage second-level blades and the second-level main combustion hub form a first air inlet channel, the main combustion stage first-level tower type cyclone comprises a first-level main combustion hub and main combustion stage first-level blades arranged between the outer surface of the first-level main combustion hub and the inner surface of the second-level main combustion hub, the main combustion stage first-level blades and the first-level main combustion hub form a second air inlet channel, the on-duty stage second-level cyclone comprises a second-level on-duty hub, the on-duty stage second-level blades (2-4) and the second-level on-duty hub form a third air inlet channel, and the on-duty stage first-level blades (2-3) and the first-level on-duty hub form a fourth air inlet channel.
3. The tower coaxial staged combustor head of claim 2, wherein: the number of the class primary blades (2-3), the class secondary blades (2-4), the main combustion class primary blades (4-3) and the main combustion class secondary blades (4-4) is respectively a plurality of the class primary blades, and the plurality of the blades are uniformly distributed along the circumference of the hubs connected with the class primary blades.
4. A tower coaxial staged combustor head as defined in claim 3, wherein: the class first stage blade, the class second stage blade, the main combustion stage first stage blade and the main combustion stage second stage blade are curved and have the same rotation direction.
5. The tower coaxial staged combustor head as defined in claim 4, wherein: the main combustion stage secondary blades (4-4) are obliquely arranged, and the included angles between the main combustion stage secondary blades (4-4) and the horizontal plane are the same.
6. The tower coaxial staged combustor head of claim 2, wherein: the first-stage on-duty hub is connected with a rotational flow cover.
7. The tower coaxial staged combustor head of claim 2, wherein: a step structure (3) is arranged between the secondary vane (2-4) of the valve class and the primary vane (4-3) of the main combustion stage.
8. The tower coaxial staged combustor head as defined in claim 7, wherein: the step structure (3) is provided with a cooling hole.
9. The tower coaxial staged combustor head as defined in claim 8, wherein: the number of the cooling holes is several, and the cooling holes are uniformly distributed on the step top surface of the step structure (3).
10. The tower coaxial staged combustor head as defined in claim 1, wherein: the on-duty air atomizing nozzle is a rotational flow cup type air atomizing nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310837647.9A CN117053234A (en) | 2023-07-10 | 2023-07-10 | Tower type coaxial grading combustion chamber head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310837647.9A CN117053234A (en) | 2023-07-10 | 2023-07-10 | Tower type coaxial grading combustion chamber head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117053234A true CN117053234A (en) | 2023-11-14 |
Family
ID=88665173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310837647.9A Pending CN117053234A (en) | 2023-07-10 | 2023-07-10 | Tower type coaxial grading combustion chamber head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117053234A (en) |
-
2023
- 2023-07-10 CN CN202310837647.9A patent/CN117053234A/en active Pending
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