CN111578281B - Injector and nozzle assembly for combustor - Google Patents

Injector and nozzle assembly for combustor Download PDF

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Publication number
CN111578281B
CN111578281B CN202010312492.3A CN202010312492A CN111578281B CN 111578281 B CN111578281 B CN 111578281B CN 202010312492 A CN202010312492 A CN 202010312492A CN 111578281 B CN111578281 B CN 111578281B
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China
Prior art keywords
air
air flap
injection pipe
air inlet
eductor
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CN202010312492.3A
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Chinese (zh)
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CN111578281A (en
Inventor
刘晓刚
柯情
王帅东
俞瑜
郑军妹
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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Priority to CN202010312492.3A priority Critical patent/CN111578281B/en
Publication of CN111578281A publication Critical patent/CN111578281A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention relates to an ejector for a combustor, which comprises an ejector pipe, two nozzles, two air flaps and a driving mechanism, wherein the ejector pipe is provided with an air inlet end, the nozzles are arranged opposite to the ejector pipe and are positioned at the position, adjacent to the air inlet end, of the ejector pipe, the two air flaps are arranged between the nozzles and the air inlet end of the ejector pipe, and the driving mechanism is arranged at the periphery of the ejector pipe. The air flap is arranged between the nozzle and the air inlet end of the injection pipe, and the driving mechanism is arranged on the periphery of the injection pipe, so that the space of the air inlet end of the injection pipe cannot be occupied, and the two air flaps can be close to or far away from each other, so that the air flap can be ensured to be in a limited space, the air inlet amount can be adjusted to the maximum extent, and the combustion stability is ensured. In addition, the invention also relates to a nozzle assembly using the ejector.

Description

Injector and nozzle assembly for combustor
Technical Field
The invention relates to a gas cooker assembly, in particular to an ejector and a nozzle assembly for a combustor.
Background
The gas stove is a common kitchen ware in daily life, and the ejector is one of core components of the gas stove and is used for mixing gas and air to form certain pressure, so that resistance loss of a channel is overcome, certain speed is obtained at a fire hole outlet, heat flow required by the burner is ensured, and stability of burning flame is ensured.
Most of existing stove burners on the market are atmospheric burners, partial primary air needs to be premixed in advance, and therefore the amount of the required premixed primary air needs to be adjusted by an air door opening size adjusting device. Currently, there are two most common methods: one is that the effective circulation area of the primary air suction inlet is changed by rotating the air adjusting plate and moving the air adjusting plate back and forth, so as to adjust the suction amount of the primary air; when the air adjusting plate is abutted to the injection pipe, the air adjusting plate in the form can continuously rotate towards the injection pipe, so that the air adjusting plate is blocked and cannot easily rotate back; the second is that the air adjusting plate is rotatablely connected with the injection pipe, and the primary air suction amount is changed by changing the coincidence degree of the opening of the air adjusting plate and the primary air suction inlet, for example, the Chinese utility model patent with the patent number of CN201620790220.3 discloses a burner with a gear air adjusting device, and the burner is provided with tooth parts on the inner and outer air door plates; the driving piece comprises a gear, a shaft body arranged at the upper part of the gear, a shaft head arranged on the shaft body and a driving handle arranged at the lower part of the gear; the shaft head is provided with an annular clamping groove; the tip of axis body and the surface normal running fit of string shape portion, the spindle nose passes the pivot hole, ring groove and jump ring gomphosis. Although above-mentioned structure has realized the air conditioning through the air door and has advanced the volume, because the regulating part of adjusting the amount of wind directly establishes on the wind channel of drawing the injection pipe, receive to draw the orificial space restriction of injection for the actual amount of wind scope of adjusting of air door is limited, is difficult to reach the user demand many times, thereby leads to primary air not enough, thereby produces bad combustion conditions such as flame length, yellow fire, and the burning quality is poor, and harmful gas produces and increases, and the harm user is healthy.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an ejector for a combustor, which has a driving mechanism arranged to avoid an ejector air duct and can adjust air volume in a large range, aiming at the current situation of the prior art.
The second technical problem to be solved by the invention is to provide an ejector which can realize the support of a driving mechanism without additionally arranging a support structure while realizing the adjustment of the air intake, aiming at the current situation of the prior art.
A third technical problem to be solved by the present invention is to provide a nozzle assembly used in conjunction with the above-mentioned ejector, in view of the current situation of the prior art.
The fourth technical problem to be solved by the present invention is to provide a nozzle assembly which is used with the above ejector and has a nozzle air output gradually changing with the air gate, in view of the current situation of the prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows:
an injector for a combustor includes
An injection pipe having an air inlet end;
also includes:
the two air flap pieces are arranged at the air inlet end of the injection pipe side by side along the airflow flowing direction, and the first ends of the two air flap pieces are rotationally connected together;
the driving mechanism is arranged on the periphery of the injection pipe, the power output end of the driving mechanism is in driving connection with at least one air flap, and the second ends of the two air flaps are driven to be close to or far away from each other, so that the gap between the two air flaps is reduced or enlarged.
In order to ensure that the air flaps have enough movement space when moving, preferably, the two air flaps are arranged up and down and are arranged on the injection pipe in a manner of moving up and down under the driving of the driving mechanism.
In order to ensure the power transmission efficiency, preferably, the first ends of the two air flaps are rotatably connected to the injection pipe, and the rotation axes of the two air flaps are substantially parallel to the central line of the injection pipe.
In order to further ensure that the two air flaps can have a good air flow blocking effect when closing the air inlet end and ensure that air cannot leak, preferably, the two air flaps are at least partially overlapped when the air inlet end of the injection pipe is in a closed state.
In order to ensure that the two air flap pieces can still allow the gas to pass through when being closed, and safety accidents are avoided, two oppositely-arranged abdicating notches are respectively arranged on the side edges which are adjacent to each other on the air flap pieces, and the abdicating notches on the air flap pieces can be positioned at the air inlet end of the injection pipe in a closed state to form a through hole for the gas flow to pass through.
There are various configurations for realizing the driving mechanism for driving the flaps, and it is preferable that the driving mechanism includes a power source and a gear portion provided at an output end of the power source, and at least one of the two flaps is provided with a rack portion engaged with the gear portion at a position adjacent to the second end.
The first form of the rack portion is: the rack portion is external teeth arranged on the end face of the second end of the at least one air flap.
The second form of the rack portion is: two in the air flap at least one its second end is seted up vertical extension's guide way, rack portion is for locating the internal tooth on this guide way towards the inner wall of air flap first end.
In order to further solve the second technical problem, a third form of the rack portion is: two one of them of air door piece is equipped with the external tooth on its second end terminal surface, two vertical extension's guide way is seted up at its second end to another one in the air door piece, and this guide way is equipped with the internal tooth towards the inner wall of air door piece first end, the internal tooth forms with the external tooth jointly rack portion, gear portion be located between internal tooth and the external tooth and mesh simultaneously with both, gear portion and rack portion complex form can realize the transmission of power on the one hand like this, and on the other hand, internal tooth and external tooth can support through the centre gripping to gear portion, and realize the support to whole actuating mechanism, need not to design other mounting structure in addition, not only can save space, can also ensure that the power transmission is more stable.
In order to further ensure stable transmission between the gear portion and the two racks, the rack portion has an arc-shaped structure bent toward the rotation side.
In order to fully mix gas airflow and air, the injection pipe comprises a contraction section, a straight pipe section and an expansion section which are sequentially arranged along the airflow flowing direction, the cross section of the contraction section is gradually reduced along the airflow flowing direction, the cross section area of each part of the straight pipe section is equal, and the cross section area of the expansion section is gradually increased.
As an improvement, the maximum opening angle of the two air flap sheets far away from each other is Cmax＝180L1/πi1R1+180L2/πi2R2，i1＝n/n1，i2＝n/n2(ii) a Wherein:
L1is the effective arc length of the outer teeth, R1Is the radius of the external teeth, n1The rotational speed of the external teeth;
L2is the effective arc length of the internal teeth, R2Is the radius of the internal teeth, n2The rotational speed of the internal teeth;
r is the radius of the gear portion, and n is the rotational speed of the gear portion.
In order to further solve the third technical problem, the invention adopts the following technical scheme: a nozzle assembly for the above-described eductor: the air inlet structure comprises a nozzle seat and at least two nozzles arranged on the nozzle seat, wherein the nozzles are arranged on the upstream of the air flap along the air flow direction and are opposite to the air inlet end.
In order to further solve the fourth technical problem, as an improvement, the aperture of each nozzle is sequentially increased from the first end to the second end of the air flap, so that the change of the aperture of the nozzle can make the gas outlet amount of the nozzle and the air inlet amount of the air door form a correlation, and the insufficient combustion in a local area caused by the uneven ratio of the gas to the air is avoided.
Compared with the prior art, the invention has the advantages that: this an ejector for combustor is including drawing penetrating the pipe, air flap and actuating mechanism, wherein actuating mechanism arranges in drawing the periphery of penetrating the pipe and with draw two air flap drive connection between the pipe air inlet end, air inlet end department is arranged to this kind of air flap, and actuating mechanism arranges the peripheral design of penetrating the pipe, can not occupy the space of drawing penetrating the pipe air inlet end, and two air flaps can be close to each other or the design of keeping away from, can ensure in limited space, the at utmost is according to advancing the volume to the air and adjusting, ensure the combustion stability.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an ejector according to an embodiment of the present invention;
FIG. 2 is a schematic view of the injection pipe and the air flap;
FIG. 3 is a schematic diagram illustrating the two dampers in a state of closing the air inlet end of the injection pipe according to the embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the two dampers in a state where the air inlet end of the ejector pipe is opened according to the embodiment of the present invention;
fig. 5 is a schematic view of the overall structure of the nozzle holder in the embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows:
as shown in fig. 1 to 5, the injector for a burner according to a preferred embodiment of the present invention includes an injection pipe 1, a damper 3, and a driving mechanism 4. The injection pipe 1 has an air inlet end 1a, and specifically includes a contraction section 11, a straight pipe section 12, and an expansion section 13, which are sequentially arranged along the airflow flowing direction, and along the airflow flowing direction, the cross section of the contraction section 11 is gradually reduced, the cross section areas of the straight pipe section 12 are equal, and the cross section area of the expansion section 13 is gradually increased.
In this embodiment, there are two air flaps 3, and along the airflow flowing direction, the two air flaps 3 are disposed side by side at the air inlet end 1a of the injection pipe 1, and their respective first ends are rotatably connected together, the driving mechanism 4 is disposed at the periphery of the injection pipe 1, the power output end thereof is drivingly connected to at least one air flap 3, and the respective second ends of the two air flaps 3 are driven to approach or separate from each other, so that the gap between the two air flaps 3 is reduced or enlarged.
In the present embodiment, the two air flaps 3 are arranged up and down and are mounted on the injection pipe 1 to move up and down under the driving of the driving mechanism 4. Specifically, the first ends of the two air flaps 3 are rotatably connected to the ejector pipe 1, the rotating axes of the two air flaps 3 are basically parallel to the central line of the ejector pipe 1, meanwhile, in order to further ensure that the two air flaps 3 cannot leak air when the air inlet end 1a of the ejector pipe 1 is closed, the two air flaps 3 are at least partially overlapped when the air inlet end 1a of the ejector pipe 1 is closed, so that the joint between the two air flaps 3 can be ensured to be free from gaps due to the overlapped design of the two air flaps, and the minimum introduced air quantity is ensured.
In order to ensure that the two air flaps 3 do not affect the flow of the fuel gas when the air inlet end 1a of the injection pipe 1 is closed, oppositely-arranged abdicating notches 31 are respectively formed on the adjacent side edges of the two air flaps 3, and the abdicating notches 31 on the two air flaps 3 can be combined to form a through hole 3a for the fuel gas to pass through when the air inlet end 1a of the injection pipe 1 is in a closed state.
In the present embodiment, the above-mentioned driving mechanism 4 includes a power source 41 and a gear portion 42 provided at the output end of the power source 41, and at least one of the two flaps 3 is provided with a rack portion engaged with the gear portion 42 at a position adjacent to the second end, wherein the rack portion is the external teeth 32 provided on the end surface of the second end of at least one flap 3, and the rack portion has an arc-shaped structure bent toward the rotating side.
In this embodiment, the maximum opening angle of the two flaps 3 away from each other is Cmax＝180L1/πi1R1+180L2/πi2R2，i1＝n/n1，i2＝n/n2(ii) a Wherein:
L1is the effective arc length, R, of the outer teeth 321Is the radius of the external teeth 32, n1The rotational speed of the outer teeth 32;
L2is the effective arc length, R, of the internal teeth 332Radius of the internal teeth 33, n2The rotational speed of the internal teeth 33;
r is the radius of the gear portion 42, and n is the rotational speed of the gear portion 42.
In this embodiment, this a nozzle assembly for above-mentioned ejector includes nozzle block 2 and two at least nozzles 21 of locating on nozzle block 2, and nozzle 2 arranges in the upper reaches of air flap 3 and with inlet end 1a relative arrangement along the air current flow direction, and along the first end to the second end of air flap 3, the bore of each nozzle 21 increases in proper order, and the change of nozzle bore like this can make the gas air output of nozzle form the relevance with the intake of air door, avoids the local area insufficient combustion that causes because the ratio inequality of gas and air.
Example two:
the present embodiment is different from the first embodiment in that: at least one of the two flaps 3 has a vertically extending guide groove 3b formed at a second end thereof, and the rack portion is an internal tooth 33 formed on an inner wall of the guide groove 3b facing the first end of the flap 3.
Example three:
the present embodiment is different from the first embodiment in that: one of the two air flap pieces 3 is provided with external teeth 32 on the second end face thereof, the other one of the two air flap pieces 3 is provided with a vertically extending guide groove 3b on the second end thereof, the inner wall of the guide groove 3b facing the first end of the air flap piece 3 is provided with internal teeth 33, the internal teeth 33 and the external teeth 32 form a rack portion, and a gear portion 42 is located between the internal teeth 33 and the external teeth 32 and is meshed with both.

Claims (13)

1. An injector for a combustor includes
An injection pipe (1) having an air inlet end (1 a);
it is characterized by also comprising:
the two air flap pieces (3) are arranged at the air inlet end (1a) of the injection pipe (1) side by side along the airflow flowing direction, and the first ends of the two air flap pieces are rotationally connected together;
the driving mechanism (4) is arranged at the periphery of the injection pipe (1), the power output end of the driving mechanism is in driving connection with at least one air flap (3), and the second ends of the two air flaps (3) are driven to be close to or far away from each other, so that the gap between the two air flaps (3) is reduced or enlarged;
the two air flap pieces (3) are at least partially overlapped when the air inlet end (1a) of the injection pipe (1) is in a closed state.
2. The eductor as defined in claim 1, wherein: the two air flap pieces (3) are arranged up and down and are arranged on the injection pipe (1) in a manner of moving up and down under the driving of the driving mechanism (4).
3. The eductor as defined in claim 2, wherein: the first ends of the two air flap pieces (3) are rotatably connected to the injection pipe (1), and the rotating axes of the two air flap pieces (3) are basically parallel to the central line of the injection pipe (1).
4. The eductor as defined in claim 1, wherein: two the last side that is close to each other of air flap (3) all sets up the breach of stepping down (31) of mutual disposition, two the breach of stepping down (31) on the air flap (3) can be in draw and penetrate air inlet end (1a) of pipe (1) and be in closing state and to closing and form through-hole (3a) that supply the gas air current to pass.
5. The ejector according to any one of claims 1 to 4, wherein: the driving mechanism (4) comprises a power source (41) and a gear part (42) arranged at the output end of the power source (41), and at least one of the two air flap pieces (3) is provided with a rack part meshed with the gear part (42) at a position adjacent to the second end.
6. The eductor as defined in claim 5, wherein: the rack part is an external tooth (32) arranged on the second end face of at least one air flap (3).
7. The eductor as defined in claim 5, wherein: two in air flap (3) at least one offer vertical extension guide way (3b) at its second end, rack portion is for locating internal tooth (33) on this guide way (3b) the inner wall towards air flap (3) first end.
8. The eductor as defined in claim 5, wherein: two one of them of air flap piece (3) is equipped with external tooth (32) on its second end terminal surface, two vertical extension's guide way (3b) are seted up at its second end to another one in air flap piece (3), and this guide way (3b) are equipped with internal tooth (33) on the inner wall towards air flap piece (3) first end, internal tooth (33) and external tooth (32) form jointly rack portion, gear portion (42) be located between internal tooth (33) and external tooth (32) and mesh simultaneously with both.
9. The eductor as defined in claim 5, wherein: the rack portion is of an arc structure bent towards the rotating side.
10. The ejector according to any one of claims 1 to 4, wherein: the injection pipe (1) comprises a contraction section (11), a straight pipe section (12) and an expansion section (13) which are sequentially arranged along the airflow flowing direction, the cross section of the contraction section (11) is gradually reduced along the airflow flowing direction, the cross sectional areas of all the parts of the straight pipe section (12) are equal, and the cross sectional area of the expansion section (13) is gradually increased.
11. The eductor as defined in claim 8, wherein: the maximum opening angle of the two air flap pieces (3) which are far away from each other is Cmax＝180L1/πi1R1+180L2/πi2R2，i1＝n/n1，i2＝n/n2(ii) a Wherein:
L1is the effective arc length, R, of the outer teeth (32)1Is the radius of the external teeth (32), n1The rotational speed of the outer teeth (32);
L2is the effective arc length, R, of the internal teeth (33)2Is the radius of the internal teeth (33), n2The rotational speed of the internal teeth (33);
r is the radius of the gear portion (42), and n is the rotational speed of the gear portion (42).
12. A nozzle assembly using the injector of any one of claims 1 to 11, wherein: the air inlet structure comprises a nozzle seat (2) and at least two nozzles (21) arranged on the nozzle seat (2), wherein the nozzles (2) are arranged on the upstream of the air flap (3) along the air flow direction and are opposite to the air inlet end (1 a).
13. The nozzle assembly of claim 12, wherein: the calibers of the nozzles (21) are sequentially increased from the first end to the second end of the air flap (3).
CN202010312492.3A 2020-04-20 2020-04-20 Injector and nozzle assembly for combustor Active CN111578281B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010312492.3A CN111578281B (en) 2020-04-20 2020-04-20 Injector and nozzle assembly for combustor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010312492.3A CN111578281B (en) 2020-04-20 2020-04-20 Injector and nozzle assembly for combustor

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CN111578281A CN111578281A (en) 2020-08-25
CN111578281B true CN111578281B (en) 2021-07-23

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100826711B1 (en) * 2006-12-20 2008-04-30 엘지전자 주식회사 Heating cooking appliance and burner system of the same
CN201251338Y (en) * 2008-07-04 2009-06-03 海信科龙电器股份有限公司 Air door unit
CN110836387A (en) * 2018-08-19 2020-02-25 宁波方太厨具有限公司 Throttle regulating mechanism of gas cooker
CN209688917U (en) * 2019-03-20 2019-11-26 钱桂红 Damper regulator for gas-cooker

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