CN202039954U - Gas fuel starting nozzle and igniter provided with same - Google Patents
Gas fuel starting nozzle and igniter provided with same Download PDFInfo
- Publication number
- CN202039954U CN202039954U CN201020641703XU CN201020641703U CN202039954U CN 202039954 U CN202039954 U CN 202039954U CN 201020641703X U CN201020641703X U CN 201020641703XU CN 201020641703 U CN201020641703 U CN 201020641703U CN 202039954 U CN202039954 U CN 202039954U
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- igniter
- pilot jet
- fuel
- fuel oil
- gas
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Abstract
The utility model provides a gas fuel starting nozzle and an igniter provided with the starting nozzle. The gas fuel starting nozzle comprises a gas transporting passage, wherein the gas transporting passage is provided with a gas inlet hole, a throttle orifice is arranged at the gas inlet hole, and a throttle hole is arranged on the throttle orifice. The gas fuel starting nozzle can be transformed based on the existing fuel oil starting nozzle component, a fuel oil starting nozzle in a fuel oil starting nozzle shell of the fuel oil starting nozzle component can be disassembled to form an unobstructed gas fuel transporting passage, so as to prevent the dust in the gas from blocking the hole and a rotational flow hole on the fuel oil starting nozzle and improve the transporting speed of the gas fuel. Moreover, throttle orifices with different apertures can be adopted to adjust the flame length in an igniter shell, so as to make sure that the flame formed in the igniter shell can ignite the main fuel in a gas turbine.
Description
Technical field
The utility model relates to a kind of nozzle, especially, relates to a kind of gaseous fuel pilot jet.In addition, the utility model also provides a kind of igniter that comprises above-mentioned pilot jet.
Background technique
When having the gas turbine starting ignition now, though can adopt gaseous fuel as igniter fuel, the process of its ignition start still adopts indirect firing mode, and pilot jet also still adopts the liquid fuel pilot jet of engine ignition device.
The engine ignition device all is as igniter fuel usually with liquid fuel atomizing back, the atomizing of liquid fuel process is realized by the fuel oil pilot jet assembly in the igniter, Fig. 1 and Fig. 2 show the structure of existing igniter and fuel oil pilot jet assembly respectively, below in conjunction with Fig. 1 and Fig. 2 the igniting process that has the aeroengine igniter now is described: the atomized fuel of lighting the ejection of fuel oil pilot jet assembly during igniter work earlier with low pressure sparking plug 60, in igniter case 20, form flame, flame of combustion enters in the combustion chamber flame drum, finally lights the main fuel that sprays in the main jet in the burner inner liner.Wherein, the fuel oil pilot jet housing 71 that fuel oil pilot jet assembly comprises fuel oil pilot jet 70 and is arranged on the periphery of this fuel oil pilot jet, be processed with a whirl hole 73 about about 1.5mm at the middle part of fuel oil pilot jet 70, this whirl hole 73 is a blind hole; Be processed with the aperture 75 of an about 1mm at small end place, fuel oil pilot jet 70 side, this aperture 75 communicates with the whirl hole 73 at nozzle middle part.The monolateral radial clearance that 1mm is arranged between the nozzle mounting hole on nozzle small end cylindrical place and the fuel oil pilot jet housing 71 approximately.During 70 work of fuel oil pilot jet, fuel oil enters fuel oil pilot jet housing 71 backs enter fuel oil pilot jet 70 by the gap between fuel oil pilot jet 70 and the fuel oil pilot jet housing 71 side, aperture 75 by the side enters whirl hole 73 again, because pressure and action of centrifugal force, from 70 li ejections of fuel oil pilot jet be the fuel oil that has atomized, the fuel oil after the atomizing could be lighted by low pressure sparking plug 60.
Description by top structure to engine ignition device and fuel oil pilot jet assembly as can be seen, the structure of fuel oil pilot jet is comparatively complicated, and have in the existing employed gaseous fuel of gas turbine is coke-stove gas greatly, because the purification of gaseous fuel is thorough inadequately, can make a large amount of coal tar oil, crystal, dust, and the carbon deposit that produces during high-temperature baking is very easy to the fuel channel of fuel oil pilot jet is stopped up, blocking position A as shown in Figure 2 causes causing that the gas turbine situation of difficult that often occurs lighting a fire takes place.The general methods such as immersion, baked wheaten cake, water dash, air-blowing that adopt are cleared up, and not only clearance time is long and obstruction can not be cleaned out fully, influences the working efficiency of gas turbine.
The model utility content
The igniter that the utility model provides a kind of gaseous fuel pilot jet and had this gaseous fuel pilot jet can solve the technical problem that adopts gaseous fuel to stop up easily as the fuel oil pilot jet of the igniter of igniter fuel.
For solving the problems of the technologies described above, according to an aspect of the present utility model, provide a kind of gaseous fuel pilot jet, it comprises the gas transmission path, and this gas transmission path has suction port, and this suction port place is provided with the orifice plate that dams, and has the hole of damming on this orifice plate that dams.
Further, the dam diameter in hole can be 1mm to 1.5mm.
According on the other hand of the present utility model, a kind of igniter also is provided, it comprises above-mentioned gas fuel pilot jet.
Further, igniter provided by the utility model can also comprise igniter case, and the gas transmission path of gaseous fuel pilot jet also has the air outlet, and this air outlet is communicated with igniter case.
Further, the suction port place of the gas transmission path of gaseous fuel pilot jet also is provided with the starting air supply pipe, and the mouth of pipe of this starting air supply pipe links to each other with suction port, and the orifice plate that dams can be arranged between the suction port and the mouth of pipe.
Further, the suction port place can be provided with connecting-tube nozzle, connecting-tube nozzle can have tapered end, intercepter plate has the taper bending edge that the tapered end with connecting-tube nozzle adapts, the outlet end of starting air supply pipe has the taper mouth of pipe that extends out, and this taper mouth of pipe can be arranged on the periphery of intercepter plate and closely contact with the taper bending edge of intercepter plate.
Further, the center line of the center line of connecting-tube nozzle, starting air supply pipe, and the center line in the hole of damming is coaxial.
Further, connecting-tube nozzle can be provided with cap nut with the periphery of the joint of starting air supply pipe.
Further, the gas transmission path can be formed by fuel oil pilot jet housing.
Further, the dam aperture in hole is identical with the diameter of the whirl hole of fuel oil pilot jet.
The utlity model has following beneficial effect:
Gaseous fuel pilot jet provided by the utility model can be transformed on the basis of existing fuel oil pilot jet assembly, the fuel oil pilot jet that is arranged in the fuel oil pilot jet assembly in the fuel oil pilot jet housing can be removed, form unobstructed gaseous fuel transmission channel, prevent aperture and whirl hole on the dust obstruction fuel oil pilot jet in the gas, improve the transfer rate of gaseous fuel.And, can regulate flame length in the igniter case by the orifice plate that dams that employing has different apertures, guarantee can the ignite main fuel of gas turbine inside of the flame that forms in the igniter case.
Except purpose described above, feature and advantage, the utility model also has other purpose, feature and advantage.With reference to figure, the utility model is described in further detail below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the cross-sectional view of igniter in the prior art;
Fig. 2 is the cross-sectional view of prior art intermediate fuel oil pilot jet;
Fig. 3 is the igniter generalized section of the utility model preferred embodiment;
Fig. 4 is the gaseous fuel pilot jet of the utility model preferred embodiment and the linkage structure schematic representation of starting air supply pipe;
Fig. 5 is the flammable area schematic that air mixes with gaseous fuel.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As shown in Figure 3 and Figure 4, the utility model provides a kind of gaseous fuel pilot jet and has had the igniter of this nozzle, wherein, the gaseous fuel pilot jet can be an independently nozzle of structure, also can be by reequiping with the fuel oil pilot jet assembly of igniter one.In the present embodiment, this gaseous fuel pilot jet can be converted by the fuel oil pilot jet assembly on the igniter of existing aeroengine, and other structures of igniter then need not to improve.Owing to adopt gaseous fuel not need the process that atomizes as igniter fuel, fuel oil pilot jet in the fuel oil pilot jet assembly can be removed, formed a more unobstructed gas transmission path 75 in fuel oil pilot jet housing, gaseous direct fuel is injected in the igniter case 20 from the gas transmission path 75 in the fuel oil pilot jet housing.
In order to control the amount that enters the gaseous fuel in the igniter case 20, the orifice plate 76 that dams can be set at suction port 72 places of fuel oil pilot jet housing 71, this orifice plate 76 that dams is provided with the hole of damming, can be by the adjusting input quantity that the size adjustment in aperture in hole enters the gaseous fuel in the igniter case 20 of damming.Originally the position that was used to install fuel oil pilot jet 70 on fuel oil pilot jet housing 71 has just formed the air outlet 74 of gas transmission path 75, and this air outlet 74 is communicated with igniter case 20.The gaseous fuel that adopts different calorific values when gas turbine is during as igniter fuel, as coke-stove gas, coal-seam gas, rock gas etc., can be by changing the orifice plate 76 that dams in different apertures, regulate the length of the ignition flames that form in the igniter case 20, guarantee that this ignition flame can enter in the burner inner liner of gas turbine reliably the main fuel of gas turbine to be lighted.Be difficult to the main fuel in the burner inner liner if the length of ignition flame is too short,, then can influence the life-span of burner inner liner if ignition flame is long.Because gaseous fuels are partially mixed with air in the igniter case 20, through look into " the nozzle technology handbook, coefficient of excess air a=0.2 to 0.8, and the flow velocity of gaseous fuel be 15 to 50m/s be flammable regional, as shown in Figure 5.
Though lack the formula that calculates gas turbine pilot jet hole size, but in order to make gaseous fuel can reach identical with the state of the gaseous fuel that adopts original fuel oil pilot jet assembly ejection by the hole ejection of damming on the orifice plate that dams, the principle of design in aperture in hole of damming be keep as far as possible with original fuel oil pilot jet assembly in fuel oil pilot jet 70 on the diameter of whirl hole 73 identical, individual in the present embodiment, because the aperture of the whirl hole 73 (as Fig. 2) of original fuel oil pilot jet 70 that gas turbine uses is 1.5 millimeter, therefore, the dam aperture in hole can be set at 1 to 1.5 millimeter.
Because the igniter case 20 of common motor has satisfied the air inlet requirement, need not that igniter case is carried out any improvement and just can guarantee that fuel gas mixes with the even of air.Gaseous fuel pilot jet after the improvement is mode air feed burning in igniter case of direct projection, because gas turbine rotary speed is low, seed region mixed airflow flowing velocity is also lower, can guarantee the starting flame holding in the igniter case 20, flame can pass in the interior burner inner liner of gas turbine, the rotating speed of gas turbine when therefore, also not needing to change igniter work.It is basic identical with the injection direction that is ejected in the igniter case after atomizing from former fuel oil pilot jet to be ejected into the injection direction of the gaseous fuel in the igniter case 20 from the fuel oil pilot jet housing 71 of having removed the fuel oil pilot jet, only be that the angle that sprays becomes big, three air inlet duct and five inlet hole of the air that comes out from gas compressor from the igniter case 20 enters and carries out eddy flow, can fully allow gaseous fuel and air mixing, therefore, the mounting point of fuel oil pilot jet housing 71 on igniter case 20 also need not to change.
For existing fuel ignition device, suction port 72 places at fuel oil pilot jet housing 71 are provided with connecting-tube nozzle, the periphery of this connecting-tube nozzle is frustoconic shape, is arranged on usually in the mouth of pipe that extends out shape of starting air supply pipe 90, cap nut 80 lock sealings by being set in both joints again.In the present embodiment, the orifice plate 76 that dams can be arranged between connecting-tube nozzle and the starting air supply pipe 90.Specifically, the periphery of orifice plate 76 of damming can be provided with the bending edge that the connecting-tube nozzle with frustoconic shape adapts, can be by this bending along making the orifice plate 76 that dams present the effect of spiral-lock in the connecting-tube nozzle outside, the mouth of pipe that extends out shape that will start air supply pipe 90 again is connected to the outside of the orifice plate 76 that dams, and the inboard of the mouth of pipe is contacted with the outer bent face on the bending edge of the orifice plate that dams, like this, the interior bent face on bending edge of orifice plate 76 of damming contacts with the periphery of connecting-tube nozzle, the inner side surface of the mouth of pipe of starting air supply pipe 90 contacts with the outer bent face of the orifice plate 76 that dams, can play dual sealing effect, at last, by cap nut 80 joint of connecting-tube nozzle with starting air supply pipe 90 sealed again, realize the effect of conveying gas fuel reliably.In order to make cap nut 80 and starting can have better sealing effect between the air supply pipe 90, between the two, can also be provided with stuffing box gland 91.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a gaseous fuel pilot jet comprises gas transmission path (75), and described gas transmission path (75) has suction port (72), it is characterized in that, described suction port (72) locates to be provided with the orifice plate (76) that dams, and the described orifice plate that dams (76) has the hole of damming.
2. gaseous fuel pilot jet according to claim 1 is characterized in that, the diameter in the described hole of damming is 1mm to 1.5mm.
3. an igniter is characterized in that, comprises claim 1 or 2 described gaseous fuel pilot jets.
4. igniter according to claim 3 is characterized in that, also comprises igniter case (20), and the gas transmission path (75) of described gaseous fuel pilot jet also has air outlet (74), and described air outlet (74) are communicated with described igniter case (20).
5. igniter according to claim 4, it is characterized in that, the suction port (72) of the gas transmission path (75) of described gaseous fuel pilot jet locates also to be provided with starting air supply pipe (90), the mouth of pipe of described starting air supply pipe (90) links to each other with described suction port (72), and the described orifice plate that dams (76) is arranged between the described suction port (72) and the described mouth of pipe.
6. igniter according to claim 5, it is characterized in that, described suction port (72) locates to be provided with connecting-tube nozzle, described connecting-tube nozzle has tapered end, described intercepter plate (76) has the taper bending edge that the tapered end with described connecting-tube nozzle adapts, the outlet end of described starting air supply pipe (90) has the taper mouth of pipe that extends out, and the described taper mouth of pipe is arranged on the periphery of described intercepter plate (76) and closely contacts with the taper bending edge of described intercepter plate (76).
7. igniter according to claim 6 is characterized in that, the center line of the center line of described connecting-tube nozzle, described starting air supply pipe (90), and the center line in the described hole of damming is coaxial.
8. igniter according to claim 7 is characterized in that, the periphery of the joint of described connecting-tube nozzle and described starting air supply pipe is provided with cap nut (80).
9. igniter according to claim 3 is characterized in that, described gas transmission path (75) is formed by fuel oil pilot jet housing (71).
10. igniter according to claim 9 is characterized in that, the aperture in the described hole of damming is identical with the diameter of the whirl hole (73) of fuel oil pilot jet (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020641703XU CN202039954U (en) | 2010-12-03 | 2010-12-03 | Gas fuel starting nozzle and igniter provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020641703XU CN202039954U (en) | 2010-12-03 | 2010-12-03 | Gas fuel starting nozzle and igniter provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202039954U true CN202039954U (en) | 2011-11-16 |
Family
ID=44967401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020641703XU Expired - Fee Related CN202039954U (en) | 2010-12-03 | 2010-12-03 | Gas fuel starting nozzle and igniter provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202039954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277196A (en) * | 2013-05-15 | 2013-09-04 | 中国南方航空工业(集团)有限公司 | Igniter and improvement method of igniter |
| CN107514312A (en) * | 2017-09-04 | 2017-12-26 | 中国航发南方工业有限公司 | The control device and control method of the pneumatic cleaning magnetic valve of combustion engine |
-
2010
- 2010-12-03 CN CN201020641703XU patent/CN202039954U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277196A (en) * | 2013-05-15 | 2013-09-04 | 中国南方航空工业(集团)有限公司 | Igniter and improvement method of igniter |
| CN103277196B (en) * | 2013-05-15 | 2015-08-19 | 中国南方航空工业(集团)有限公司 | A kind of igniter and remodeling method thereof |
| CN107514312A (en) * | 2017-09-04 | 2017-12-26 | 中国航发南方工业有限公司 | The control device and control method of the pneumatic cleaning magnetic valve of combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20171203 |