An injector suitable for use in a fuel gas turbine

Abstract

The utility model provides an injector suitable for fuel gas turbine belongs to gas turbine structure design field, it includes casing, filter, nozzle, second channel nozzle, swirler, check valve, compression device and injector cover cap, is provided with three channels in casing, wherein first channel and second channel one end respectively with third channel intercommunication, first channel and second channel other end inside all are equipped with filter, third channel inside from right to left is equipped with first channel nozzle, second channel nozzle, swirler, check valve and compression device, compression device left side installs nut, third channel right end injector cover cap, first channel nozzle and first channel are connected, second channel nozzle and second channel are connected, second channel nozzle is equipped with swirler, solve traditional injector single channel fuel regulation effect is not good, and the problem that carbon and carbon residue form simultaneously easily in the position of spout, adopt centrifugal type double channel injector, ensure the injection quality of fuel under each working condition of gas turbine engine.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of injector suitable for fuel gas turbine, belong to the field of gas turbine structural design. BACKGROUND

[0002] Injector is widely used in internal combustion engine, fuel gas turbine and fuel boiler and other fields, and it is its core equipment or parts, and its performance is directly related to the performance and efficiency of combustion device, influence fuel economy index, traditional injector is single-channel regulation, its fuel regulation effect is not good, simultaneously traditional injector is easy to form carbon deposit and carbon residue in the position of nozzle, light influence injector injection effect, heavy cause obstruction.

[0003] Therefore, a new type of injector suitable for fuel gas turbine is needed to solve the above technical problems. SUMMARY

[0004] The present application is to solve the problem of traditional injector single-channel fuel regulation effect is not good, simultaneously easy to form carbon deposit and carbon residue in the position of nozzle, in the following text, a brief overview of the present application is given, to provide some aspects of the basic understanding of the present application. It should be understood that this summary is not an exhaustive summary of the present application. It is not intended to determine the key or important part of the present application, nor is it intended to limit the scope of the present application.

[0005] The technical scheme of the present application:

[0006] A kind of injector suitable for fuel gas turbine, including shell, filter, first channel nozzle, second channel nozzle, cyclone, check valve, compression device, nut and injector cover, shell is provided with three channels, wherein first channel and second channel one end are communicated with third channel respectively, first channel and second channel other end are both provided with filter inside, first channel nozzle, second channel nozzle, cyclone, check valve and compression device are sequentially arranged in third channel from right to left, compression device left side is equipped with nut, third channel right end injector cover, first channel nozzle and first channel are connected, second channel nozzle and second channel are connected, second channel nozzle is provided with cyclone inside.

[0007] Preferably, the check valve is arranged between the first channel and the second channel.

[0008] Preferably, the check valve is fixedly connected with the third channel through a sealing ring.

[0009] Preferably, the first channel nozzle and the second channel nozzle are provided with a cover between the third channel.

[0010] Preferably, the check valve includes a sleeve, a separator tube, a steel ball, a steel ball seat, a spring, and a spring support. One end of the sleeve is clamped in the third channel by a clamping device. The steel ball is placed inside the sleeve through the steel ball seat. One end of the spring is connected to the steel ball seat, and the other end of the spring is connected to the spring support. The spring support is placed inside the separator tube. One end of the separator tube is placed inside the sleeve, and the other end of the separator tube is placed inside the housing. After being fitted onto the outside of the hydrocyclone, it is connected to the nozzle of the second channel.

[0011] Preferably, a first cover and a second cover are respectively provided in the first channel and the second channel.

[0012] Preferably, both the first channel and the second channel are equipped with filters via plugs and first gaskets.

[0013] Preferably, a second washer is provided between the nut and the housing.

[0014] Preferably, a cavity is formed between the injector cap and the right end of the housing, and the injector cap has a through hole that communicates with the outside of the cavity.

[0015] The present invention has the following beneficial effects:

[0016] 1. The present invention adopts dual-channel fuel injection to solve the problem of fuel conditions not being suitable for small operating conditions and other operating conditions, making it more practical and applicable to a wider range, and ensuring the quality of fuel injection under various operating conditions of gas turbine engines;

[0017] 2. The present invention incorporates a check valve to eliminate crossflow that occurs when fuel passes through the second channel while only the first channel is operating;

[0018] 3. The present invention employs a casing to prevent coke generated on the inner surface of the casing from entering during high-operation-condition operation of the injector;

[0019] 4. The injector cap of the present invention organizes air to purge the end of the injector nozzle to remove carbon residue, and the cap can eliminate internal coking. Attached Figure Description

[0020] Fig. 1 This is a schematic diagram of the structure of an injector suitable for fuel gas turbines;

[0021] Fig. 2 This is a schematic diagram of the fit between the first channel nozzle and the cover of the present invention;

[0022] In the diagram, A-first channel, B-second channel, C-third channel, D-cavity, 1-plug, 2-first gasket, 3-housing, 4-filter, 5-sleeve, 6-first channel nozzle, 7-second channel nozzle, 8-cyclone separator, 9-sealing ring, 10-check valve, 11-clamping device, 12-second gasket, 13-nut, 14-steel ball, 15-steel ball seat, 16-spring, 17-spring support, 18-injector cap, 19-separator tube, 20-first cover, 21-second cover, 22-cover. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0024] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as threaded connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can always be found to achieve the function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a hinged connection can be chosen for detachable connections.

[0025] Specific implementation method one: Combining Figs. 1-2 This embodiment describes an injector suitable for fuel gas turbines, comprising a housing 3, a filter 4, a first channel nozzle 6, a second channel nozzle 7, a cyclone separator 8, a check valve 10, a clamping device 11, a nut 13, and an injector cap 18.

[0026] The housing 3 has three channels. One end of the first channel A and the second channel B are connected to the third channel C, and the other end of both the first channel A and the second channel B is equipped with a filter 4. The first channel A is used to deliver fuel during engine startup and low-load operation. During other engine operating conditions, the first channel A and the second channel B work together. When a certain pressure is reached in the first channel A, the second channel B is activated.

[0027] The third channel C is provided with the following components from right to left: a first channel nozzle 6, a second channel nozzle 7, a cyclone separator 8, a check valve 10, and a clamping device 11. The check valve 10 is fixedly connected to the third channel C through a sealing ring 9 and is located between the first channel A and the second channel B. A nut 13 is screwed into the left side of the clamping device 11. The check valve 10 is clamped in the injector housing 3 through the clamping device 11. A second gasket 12 is provided between the nut 13 and the housing 3. The purpose of setting the check valve 10 is to eliminate the crossflow of fuel that will occur when only the first channel is running and the fuel passes through the second channel.

[0028] The third channel C has a right end injector cap 18. The first channel nozzle 6 is connected to the first channel A. The second channel nozzle 7 is connected to the second channel B. The second channel nozzle 7 has a vortex generator 8 inside.

[0029] The check valve 10 includes a sleeve 5, a separator tube 19, a steel ball 14, a steel ball seat 15, a spring 16, and a spring support 17. One end of the sleeve 5 is clamped in the third channel C by a clamping device 11. The steel ball 14 is set in the sleeve 5 by the steel ball seat 15. One end of the spring 16 is connected to the steel ball seat 15, and the other end of the spring 16 is connected to the spring support 17. The spring support 17 is set inside the separator tube 19. One end of the separator tube 19 is set inside the sleeve 5, and the other end of the separator tube 19 is set inside the cover 22. After being fitted on the outside of the cyclone separator 8, it is connected to the second channel nozzle 7. The cover 22 can eliminate internal coking. The cover allows fuel to be fed from the first channel A to the first channel nozzle 6 without contacting the heating shell 3. The separator tube 19 is an elastic element to prevent the injector from losing its seal under all operating conditions.

[0030] The first channel A and the second channel B are respectively provided with a first cover 20 and a second cover 21. The first cover 20 and the second cover 21 ensure that the fuel is delivered into the nozzle without contacting the housing 3, and protect the inlet channel to prevent coke generated on the inner surface of the housing 3 from entering during the high-operational-condition operation of the injector.

[0031] Both the first channel A and the second channel B are equipped with filters 4 via plug 1 and first gasket 2.

[0032] A cavity D is formed between the injector cap 18 and the right end of the housing 3, and the injector cap 18 has a through hole that communicates with the outside of the cavity D to organize air to purge the end of the injector nozzle in order to remove carbon residue.

[0033] In low-power operation, fuel is introduced into the first channel A and air is introduced into the second channel B. After the fuel enters the third channel C through the first channel A, it enters the two tangential holes of the first channel nozzle 6 and is then ejected. In high-power operation, fuel is introduced into the first channel A and the second channel B at the same time. The fuel passes through the check valve 10 and the cyclone separator 8 through the second channel B and is then ejected through the second channel nozzle 7 to the first channel nozzle 6, where it merges with the fuel in the first channel A before being ejected again.

[0034] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An injector suitable for fuel oil gas turbines, characterized in that: The device includes a housing (3), a filter (4), a first channel nozzle (6), a second channel nozzle (7), a cyclone separator (8), a check valve (10), a clamping device (11), a nut (13), and an injector cap (18). The housing (3) has three channels. One end of the first channel (A) and the second channel (B) are connected to the third channel (C). The other end of the first channel (A) and the second channel (B) are both equipped with filters (4). The third channel (C) is equipped with the first channel nozzle (6), the second channel nozzle (7), the cyclone separator (8), the check valve (10), and the clamping device (11) from right to left. The clamping device (11) is equipped with a nut (13) on the left side. The third channel (C) is equipped with an injector cap (18) on the right side. The first channel nozzle (6) is connected to the first channel (A), and the second channel nozzle (7) is connected to the second channel (B). The second channel nozzle (7) is equipped with a cyclone separator (8). The check valve (10) is disposed between the first channel (A) and the second channel (B); A cavity (D) is formed between the injector cap (18) and the right end of the housing (3), and the injector cap (18) has a through hole that communicates with the outside and the cavity (D); A cover (22) is provided between the first channel nozzle (6), the second channel nozzle (7), and the third channel (C); The check valve (10) includes a sleeve (5), a dividing tube (19), a steel ball (14), a steel ball seat (15), a spring (16), and a spring support (17). One end of the sleeve (5) is clamped in the third channel (C) by a clamping device (11). The steel ball (14) is set in the sleeve (5) by the steel ball seat (15). One end of the spring (16) is connected to the steel ball seat (15), and the other end of the spring (16) is connected to the spring support (17). The spring support (17) is set inside the dividing tube (19). One end of the dividing tube (19) is set inside the sleeve (5), and the other end of the dividing tube (19) is set inside the cover (22). After being fitted on the outside of the hydrocyclone (8), it is connected to the second channel nozzle (7). A first cover (20) and a second cover (21) are respectively provided in the first channel (A) and the second channel (B).

2. The injector for an oil-fired gas turbine according to claim 1, characterized in that: The check valve (10) is fixedly connected to the third channel (C) via a sealing ring (9).

3. An injector suitable for fuel gas turbines according to claim 2, characterized in that: Both the first channel (A) and the second channel (B) are equipped with filters (4) through a plug (1) and a first gasket (2).

4. An injector suitable for fuel gas turbines according to claim 3, characterized in that: A second washer (12) is provided between the nut (13) and the housing (3).

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