The housing of the fuel injector for a gas turbine engine (options) and the method of its manufacture

 

The housing of the fuel injector for a gas turbine engine, made from part of a rigid material contains the input and output end portions. In the housing between the input and output end portions made of at least one of the slot means that the entire length of the encapsulated at least one closing means with the formation of at least one of the fuel supply from the input end part of the said output end portion. The input end part is made with the possibility of connection is connected to the fuel injector adapter fuel line and fuel supply through the said housing of the fuel injector. When manufacturing the casing of the fuel injector first rassverlivajut the opposite ends of the details of the solid material. Then perform at least one slot means along the length of the mentioned items between input and output parts. Seal groove means through at least one closing device to form at least one channel of the fuel supply from the input end towards the output end part. The invention allows to create a superior and cost-effective housing fuel forsok the reak-before:always;">

The invention relates to fuel injectors for gas turbine engines or, in particular, to the cases of nozzles through which fuel is feed.

The prior art Fuel injectors for gas turbine engines are well known element. The nozzle, in the traditional version used for delivery of the fuel mixture in the combustion chamber where it ignites, releasing, thus, the energy that is used to rotate the engine. Typically, the combustion chamber has many fuel injectors to ensure uniform dispersion of the fuel within the cavity.

Traditional fuel injectors consist of input jacks, which is connected with the fuel injector body (the trunk) with dual channels of fuel and at least one end of the nozzle for spraying fuel inside the combustion chamber. To be more precise, the body of such fuel injector consists of a primary tube and a secondary tube that is located inside the cylindrical casing, which serves as an element of rigidity and preventing the supply of heat to the inner tubes. Actually, the outer casing is exposed to the hot jet of compressed gas and, thus, tonoi tubes from contact with the hot outer casing.

Usually the primary and secondary tubes are concentric position within the outer casing, to create two separate channels for the movement of the primary and secondary fuel streams, respectively. In particular, the primary fuel is moving through the channel of circular cross section, called the primary tube, while the secondary fuel is delivered through the annular space between the primary and secondary pipe.

There is another design above the fuel injector, where the primary and secondary tubes are located inside the outer casing is not concentrically and, thus, the secondary fuel flows through the circular channel of the secondary tube instead move in the cavity between the primary and secondary tubes still in a concentric design. Also the double barrels of the nozzles of gas turbine engines is described in U.S. patent 4735044 of April 5, 1988 in the name of Richey (Richey), 5423178 and 5570580 dated June 13, 1995 and November 5, 1996, respectively, issued to Mains (Mains).

In U.S. patent 3684186 dated August 15, 1972 in the name of Helmrich (Helmrich) and 4609150 on September 2, 1986 in the name of Payne (Pane), the fuel and air channels, which are treated as a single element. In particular, in the patent 3684186 tidal channel), the secondary fuel supply pipes and many are located around the circumference of the air channels. All these channels are drilled in the main body of the fuel injector or distributed in the area between adjacent components of the fuel injector. In the patent 4609150 offers a fuel injector, which is divided into two separate elements - the main body and a nozzle head. Namely, the fuel channel and the air channel are located in the main housing, and a nozzle head provided with guides for the formation of air turbulence, element in the form of a truncated cone and plate with holes for the formation of eddies of fuel. The head element is welded to an end face of the main body of the nozzle for forming a composite fuel injector.

And finally, in U.S. patent 5598696 on February 4, 1997 in the name of Stats (Stotts) provides a fuel injector that contains the barrel, which is connected to the input fitting and with a spray nozzle. The barrel has a solid main part, in the center pane, which by drilling or casting formed by the primary fuel supply pipes and the second primary channel fuel.

Summary of the invention an object of the present invention is to provide an improved nozzle of the invention is to provide such a nozzle, that would be simple and economical to manufacture.

Design, in accordance with the present invention, consists of a body of the fuel injector for a gas turbine engine having input and output end portions. The case represents a part (workpiece) of solid material, in which the at least one slot means passing between input and output end portions of the housing. Grooving tool along the entire length of sealed closing means with the formation of at least one of the fuel supply from the input end towards the output.

In accordance with another aspect of the present invention provides a housing of the fuel injector for a gas turbine engine having a main part, in which the at least one slot means, which together with at least one closing means forms at least one channel of the fuel supply having input and output ends, and at least one stream of fuel can be moved from the input end to the output.

In a preferred embodiment, the input end portion configured to connect with the fuel line adapter, which in swasti made with the possibility of connection with the spray head, which has at least one outlet of the fuel atomization for later burning.

In the preferred embodiment, can be used shielding means surrounding the body and ensure its insulation. In particular, it can be made in the form of a cylindrical sleeve, the opposite ends of which are based on the nozzle body. A cylindrical sleeve is separated from the nozzle between the opposite ends of the nozzles.

In another preferred embodiment of the present invention the input and output end part of the housing is fitted with primary and secondary channels. Grooving tools perform the functions of the primary and secondary channels, respectively, are connected with the primary channels and secondary channels, resulting in primary and secondary fuel flows through the body. The primary and secondary channels can be located on one side of the casing and sealed to one end tool. Also the primary and secondary fuel channels can be located on opposite sides of the casing and sealed to various closing means.

In the method of manufacturing a housing of the fuel injector gas from the solid material. Then drill the workpiece from opposite ends to generate the input and output end portions. Next are grooving tool along the length of the workpiece between the end parts. And then grooving tools sealed closing means with the formation of at least one of the fuel supply to fuel movement from the input end towards the output.

In preferred variants of the invention, the closing means are welded to the housing of the fuel injector, and the input end portion connected to connected to the fuel injector adapter fuel line with fuel through the housing of the fuel injector, for example, you solder the input end portion to the adapter fuel line. To the output end portion in the preferred embodiments of the invention is connected by means of soldering node spray head.

In another preferred embodiment of the invention the housing of the fuel injector is placed inside the external display means of providing thermal insulation to the housing of the fuel injector, which you solder to the housing of the fuel injector.

In another preferred embodiment, Noah channels, two groove means in one of the slot means is connected with the possibility of the passage of flow from the primary input and output channels, and the other interlocking means connected with the possibility of the passage of flow from the secondary input and output channels, then seal the two above-mentioned interlocking means by the closing means and constitute the primary and secondary channels of the fuel. The two above-mentioned interlocking means preferably performs on different sides of the housing of the fuel injector, and between primary and secondary channels of the fuel drill transversely to the longitudinal axis of the housing, a number of holes.

In yet another preferred embodiment of the invention the said housing of the fuel injector to perform the cut.

List of drawings and other materials Fig. 1 is a detailed perspective view of the fuel injector of a gas turbine engine in accordance with the present invention, including peripheral elements, which is shown in broken lines.

Fig. 2 is a cross section made along the line 2 - 2 of Fig.1, which shows the grooves forming the primary and secondary channels of the fuel, and the corresponding primary and secondary output caeau variant implementation of the present invention.

Fig.4 is a cross section of the output end portion of the nozzle shown in Fig.3.

Fig. 5 is a side view of the housing of Fig.3, showing the groove, which defines a secondary flow channel of the fuel, the secondary input and output channels and the external casing, which is depicted by dashed lines.

Fig. 6 is a side view of the housing of Fig.3, showing the groove, which defines a primary channel of the fuel supply, and input and output channels.

Fig.7 is a top view of the housing of Fig.3.

Fig. 8 is a cross section made along the line 8 - 8 of Fig.7, which shows two grooves forming the primary and secondary channels.

Information confirming the possibility of carrying out the invention will Refer to the drawings and particularly to Fig.1, where there are all the elements of the fuel nozzle of the gas turbine engine of the present invention, which in General is indicated by item 10.

Fuel injector 10 includes a housing barrel portion of the nozzle) 12 made with the possibility of connecting the input end portion 14 with the adapter 16 for connection to the fuel manifold (hereinafter adapter fuel line) and the output end portion 18 with the node 20 of the spray head. As a result, the node 20 spray is the sector (not shown). Thus, coming from the fuel injector, the fuel will be sprayed node 20 spray head via at least one outlet of the spray of fuel for ignition in the combustion chamber (not shown), as known from the prior art.

In particular, the housing 12 includes a made in the main part of the primary and secondary channels 22 and 24 of the fuel supply having input and output ends, through which direct the primary and secondary fuel streams, respectively, from the input end part 14 to the output end portion 18 of the housing 12. The primary and secondary channels 22 and 24 of the fuel is formed at least one groove means, for example two separate grooves 26 and 28, which are made on one side of the housing 12 and sealed by a closing means, such as closed by the cover 30 by welding. In the particular case of the cover 30 is inserted into the rectangular cutout 31, along which are parallel grooves 26 and 28. Note that the cover 30 and the cut-out 31 have the same base length and width. In the result, prevents longitudinal movement of the cover 30 and it is fixed with respect to the grooves 26 and 28. The fuel comes in the primary and secondary channels 22 and the s within the inlet end portion 14 of the housing 12. As shown in Fig.2, the primary and secondary output channels 32 and 34 are located inside the output end portion 18 of the housing 12 for receiving the primary and secondary fuel flows that pass through the primary and secondary channels 22 and 24, respectively. Thus, this configuration of the housing 12 simultaneously or sequentially to send two separate fuel flow from the inlet end portion 14 to the output end portion 18.

Part of the input end portion 14 of the housing 12 is made with the possibility of installing it in the receiving part (not shown) adapter 16 trivopaedia. The adapter 16 trivopaedia has a primary and secondary fuel outlets (not shown) that are associated with primary and secondary input channels (not shown) of the housing 12. Thus, the input end portion 14 of the housing 12 is inserted into the receiving portion of the adapter 16 of the fuel line so that the primary and secondary input channels (not shown) of the housing 12 coincide with the primary and secondary fuel output adapter 16 of the fuel line, and the body 12 may be connected to the adapter 16 of the fuel line by welding, soldering or similar. As shown in Fig.1, the adapter 16 of the fuel line has a flange 36 for fastening the top of the flanged portion 18 of the housing 12 is connected to node 20 spray head, including a primary valve 38, the primary nozzle 40 and the primary screen 42, which is connected to receive a primary flow through the primary input channel (not shown), the primary channel 22 of the fuel supply, a primary output channels 32. Node 20 spray head further includes a secondary centrifugal fuel dispenser 44, receiving the secondary fuel flow through the secondary inlet channel (not shown), the secondary channel 24 of the fuel supply, the secondary output channel 34. And finally, the node spray head contains outdoor air centrifugal atomizer 46, which has a number of concentrically arranged air ducts 48, designed to move the air flow and the formation of a mixture of primary and secondary fuel, which is injected through the primary and secondary spray orifice node spray head 20, respectively. The primary valve 38 and the primary nozzle 40 are soldered (welded) into the receiving cavity (not shown) of the output end portion 18 of the housing 12. Also the primary screen 42 is soldered to the primary nozzle 40. Secondary centrifugal fuel dispenser 44 is soldered to the inner surface of the cylindrical part 50 of the outer air Raspletin air nozzle 46 so that to form a single unit.

As shown in Fig. 1, the second cutout 52, is made along the entire length of the housing 12 serves to facilitate the construction. External display means for providing thermal insulation to the housing of the fuel injector, such as an external casing 54 has at both end parts of the inner diameters corresponding to the outer diameters of the end portions of the housing 12 adjacent to the cutouts 31 and 52. Thus, the outer casing 54 is mounted on the housing 12 to protect against adverse external conditions that prevail within the gas turbine engine. In the particular case, the outer casing can be soldered to the housing 12.

Referring to the construction of the housing 12, note that the primary and secondary input channels (not shown), the grooves 26 and 28 and the primary and secondary output channels 32 and 34, all, can be obtained by machining methods. Thus, the primary and secondary channels 22 and 24 of the fuel is performed on a single detail. Typically, the body 12 is made from part of a rigid material such as stainless steel.

Let us consider Fig.3 - Fig.8, which shows another embodiment of the housing 200 of the nozzle in accordance with the present invention. In these figures the primary and secondary channels are shown in the have basically U-shaped cross-section. However, the groove 204 has a greater cross-sectional area and is for receiving the secondary fuel flow. In Fig.3 also shows that each of the grooves 202 and 204 there is a separate cover 206. Moreover, to facilitate the construction in the Central part of the housing 200 between the grooves 202 and 204 is executed a number of holes 207, located transversely to the longitudinal axis of the housing 200.

In Fig.3 and Fig.4 shows that the output end portion 208 of the housing 200 has a receiving hole 210, inside of which there are, as described above, components of the spray head, namely the primary distributor, the primary nozzle and the primary screen. Also in Fig.4 shows the output end portion 208 of the housing 200, where the primary and secondary output channels 212 and 214, which are connected with the corresponding grooves 202 and 204 for supplying primary and secondary fuel flows to the node spray head (not shown) having primary and secondary spray orifice. The axis of the output end portion 208 and the input end portion 216 of the housing 200 non-parallel, as shown in Fig.5 and Fig.6. Actually the output end portion 208 are made so as to have an angle with the longitudinal axis of the housing 200.

The input end portion 216, as. anaka 202, in turn, connects to the passage of the stream of primary input and output channels 212 and 220 (Fig.7). The groove 204 connects to the passage of flow of the secondary input and output channels 214 and 222 (Fig.5 and 7).

As in the first embodiment of the present invention the outer casing 224 serves to protect the housing 200, as shown in Fig.3 and Fig.5.

Claims

1. Case (12/200) fuel injector for a gas turbine engine, made from part of a rigid material and containing the input and output end portions (14, 18/216, 208), characterized in that in the above-mentioned parts of the solid material is made between the input and output end portions (14, 18/216, 208), at least one slot means (26, 28/202, 204), which is the entire length of the encapsulated at least one closing means (30, 206) with the formation of at least one channel (22, 24) of the fuel supply from the input end part (14, 216) to the mentioned output end part (18, 208).

2. The housing (12, 200) fuel injector under item 1, characterized in that the said input end portion (14, 216) made with the possibility of connection is connected to the fuel injector adapter (16) of the fuel line and feeds the different topics said output end portion (18, 208) is configured to connect to a node (20) spray head having at least one outlet of the fuel atomization.

4. The housing (12, 200) fuel injector under item 1, characterized in that each of these input and output end portions (14, 18/216, 208) has a primary and secondary channels(32, 34/212, 214, 220, 222), as mentioned interlocking means (26, 28/202, 204) form the primary and secondary channels (22, 24) of the fuel supply, which are connected, respectively, with the said primary and secondary channels(32, 34/212, 214, 220, 222) with the possibility of primary and secondary fuel flow through the said housing (12/200) fuel injector.

5. The housing (12, 200) fuel injector under item 4, characterized in that the said primary and secondary channels (22, 24) of the fuel supply are located on one side of the said housing (12) of the fuel injectors and have one closing means (30).

6. The housing (12) of the fuel injector under item 5, characterized in that it made the cut.

7. Case (12/200) fuel injector under item 4, characterized in that the said primary and secondary channels of the fuel supply are located on opposite sides of the said housing (200) topouzelis fact, that has a number of holes (207) located transversely to the longitudinal axis of the housing.

9. Case (12/200) fuel injector under item 1, characterized in that around the said housing (12, 200) fuel injector is located external display means (54, 224) provide thermal insulation of the above-mentioned case (12/200) fuel injector.

10. Case (12/200) fuel injector under item 9, characterized in that the said display means (54, 224) is made in the form of a cylindrical sleeve.

11. Case (12/200) the fuel injector according to p. 10, characterized in that the said cylindrical sleeve is installed based on the above-mentioned case (12/200) fuel injector its opposite ends, and between the said ends separated by a gap, and mentioned cylindrical sleeve fixed on said housing (12/200) fuel injector by means of soldering.

12. A method of manufacturing a housing (12/200) fuel injector for a gas turbine engine (10), characterized in that the first rassverlivajut the opposite ends of the details of the solid material and form the input and output end portions (14, 18/216, 218), then perform at least one slot means (26, 28/202, 204) along the length of the mentioned details maesta (26, 28/202, 204) via at least one closing means to form at least one channel fuel from the inlet end part (14, 216) to the mentioned output end part (18, 208).

13. The method according to p. 12, characterized in that the said closing means (30/206) are welded to said housing (12/200) fuel injector.

14. The method according to p. 12, characterized in that the said input end portion connected to connected to the fuel injector adapter fuel line with fuel through the said housing (12/200) fuel injector.

15. The method according to p. 14, characterized in that the said input end portion (14/216) you solder to the adapter (16) of the fuel line.

16. The method according to p. 12, wherein the output end part (18, 208) is connected the node (20) spray head.

17. The method according to p. 16, characterized in that the said unit (20) spray heads you solder to the mentioned output end part (18, 208).

18. The method according to p. 12, characterized in that said casing (12/200) fuel injector is placed inside the external display means (54, 224) provide thermal insulation of the above-mentioned case (12/200) fuel pomenutom casing (12/200) fuel injector.

20. The method according to p. 12, wherein performing the primary and secondary input channels (220, 222), primary and secondary output channels (32, 34/212, 214), two groove means (22, 24/202, 204), and one grooving tool (22/202) combined with flow passage with said primary input and output channels (220/32, 212), and the other grooving tool (24/204) combined with the possibility of the passage of flow from the secondary input and output channels (222/34, 214), then seal the two above-mentioned interlocking means (26, 28/202, 204) through the closing means (30, 206) and constitute the primary and secondary channels (22, 24) of the fuel.

21. The method according to p. 20, characterized in that the said two groove means (26, 28/202, 204) perform on different sides of the said housing (12/200) fuel injector.

22. The method according to p. 12, wherein performing the cut in the said housing of the fuel injector (12, 200).

23. The method according to p. 21, characterized in that between the said primary and secondary channels (22, 24) fuel drill transversely to the longitudinal axis of the housing a series of holes (207).

24. Case (12/200) fuel injector for a gas turbine engine having a main body, characterized in that in the above-mentioned main Cherryvale means (30, 206) forms at least one having input and output ends of the channel (22, 24) of the fuel through the said housing (12/200) fuel injector.

 

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1 dwg

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