A fuel nozzle for a gas turbine

Abstract

The utility model discloses a nozzle structure belongs to gas turbine technical field, specifically related to a kind of fuel nozzle of gas turbine, it include: nozzle main part, connecting body, small nozzle, nozzle cap subassembly and filling port subassembly;Connecting body is sleeved on nozzle main part and with nozzle main part inside is connected intercommunication, small nozzle is installed at the outlet of nozzle main part, nozzle cap subassembly is installed on nozzle main part and connecting body, filling port subassembly is installed on nozzle main part and is connected with small nozzle and is connected with nozzle main part inside;Nozzle cap subassembly includes: inner layer nozzle cap, second layer nozzle cap, third layer nozzle cap and outer layer nozzle cap;Filling port subassembly includes: first filling port, second filling port, third filling port, fourth filling port and fifth filling port, the utility model uses two kinds of fuel ignition, uses oil to ignite when starting, switch into gas after stable combustion, to prevent the problem of excessive gas pressure ignition failure.

Description

Technical Field

[0001] This utility model discloses a nozzle structure, belonging to the field of gas turbine technology, specifically relating to a fuel nozzle for a gas turbine. Background Technology

[0002] The core task of a gas turbine fuel nozzle is to efficiently and reliably inject liquid or gaseous fuel into the combustion chamber, achieving fine atomization, uniform mixing, and good matching with air to ensure stable, efficient, and low-emission combustion. Traditional fuel injectors use a mixture of multiple fuels for ignition, relying on gas for ignition. However, when the gas pressure is too high, the mixing effect with air is poor, easily leading to uneven mixing. This makes ignition difficult, and may even result in "deflagration" or direct ignition failure. During the start-up phase, the airflow within the combustion chamber is highly unstable, making reliable ignition of gaseous fuels difficult to guarantee. Utility Model Content

[0003] Purpose of the utility model: To provide a fuel nozzle for a gas turbine to solve the problems mentioned above.

[0004] Technical solution: A fuel nozzle for a gas turbine, comprising: a nozzle body, a connector, a small nozzle, a nozzle cap assembly, and a filling port assembly;

[0005] The connector is sleeved on the nozzle body and communicates with the interior of the nozzle body. The small nozzle is installed at the outlet of the nozzle body. The nozzle cap assembly is installed on the nozzle body and the connector. The filling port assembly is installed on the nozzle body and communicates with the interior of the nozzle body and the small nozzle.

[0006] The nozzle cap assembly includes: an inner nozzle cap, a second nozzle cap, a third nozzle cap, and an outer nozzle cap;

[0007] The filling port assembly includes: a first filling port, a second filling port, a third filling port, a fourth filling port, and a fifth filling port.

[0008] In a further embodiment, the nozzle body is provided with a housing.

[0009] In a further embodiment, a head cover is provided at the outlet of the nozzle body, and the head cover is located outside the nozzle cap assembly.

[0010] In a further embodiment, the inner nozzle cap, the second nozzle cap, the third nozzle cap, and the outer nozzle cap are installed at the outlet of the nozzle body from the inside out, and the small nozzle is located inside the inner nozzle cap.

[0011] In a further embodiment, the fifth filling port is installed at the inlet of the nozzle body and communicates with the interior, the first filling port is installed on the connector and communicates with the interior, and the second filling port, the third filling port and the fourth filling port are respectively installed on the nozzle body and communicate with the interior.

[0012] In a further embodiment, the nozzle body is provided with several independent connection channels. The fifth filling port is connected to the small nozzle through the connection channel. The first filling port is connected to the outer nozzle cap through the connection channel. The inner nozzle cap, the second nozzle cap, and the third nozzle cap are respectively connected to the second filling port, the third filling port, and the fourth filling port through the connection channel.

[0013] In a further embodiment, a ring is provided at the inlet of the first filling port.

[0014] In a further embodiment, a clamping ring and a transition ring are provided at the connection between the small nozzle and the nozzle body.

[0015] Beneficial effects: This invention employs two types of fuel for ignition. Oil is used for initial ignition, and after stable combustion, it switches to gas. The atomized droplets of gas have higher kinetic energy, making it easier to penetrate the compressed air flow and form a combustible mixture with air. Simultaneously, the oil mist burns faster and is more easily ignited and forms a stable initial flame nucleus under low operating conditions and low temperatures. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of this utility model.

[0017] Figure 2 This is the front view of this utility model.

[0018] Figure 3 This is an isometric drawing of this utility model.

[0019] Reference numerals: Second filling port 17, Third filling port 16, Fourth filling port 15, Small nozzle 14, Three-layer nozzle cap 13, Inner nozzle cap 12, Transition ring 11, Compression ring 10, Fifth filling port 9, Nozzle body 8, Connector 7, Ring body 6, First filling port 5, Outer shell 4, Second-layer nozzle cap 3, Outer nozzle cap 2, Head cover 1. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] A fuel nozzle for a gas turbine includes: a nozzle body 8, a connector 7, a small nozzle 14, a nozzle cap assembly, and a filling port assembly;

[0024] The connector 7 is sleeved on the nozzle body 8 and communicates with the interior of the nozzle body 8. The small nozzle 14 is installed at the outlet of the nozzle body 8. The nozzle cap assembly is installed on the nozzle body 8 and the connector 7. The filling port assembly is installed on the nozzle body 8 and communicates with the interior of the nozzle body 8 and the small nozzle 14.

[0025] The nozzle cap assembly includes: an inner nozzle cap 12, a second nozzle cap 3, a third nozzle cap 13, and an outer nozzle cap 2;

[0026] The filling port assembly includes: a first filling port 5, a second filling port 17, a third filling port 16, a fourth filling port 15, and a fifth filling port 9.

[0027] In one embodiment, such as Figures 1 to 3 As shown, the nozzle body 8 is provided with a housing 4.

[0028] In one embodiment, such as Figures 1 to 3 As shown, a head cover 1 is provided at the outlet of the nozzle body 8, and the head cover 1 is located outside the nozzle cap assembly.

[0029] In one embodiment, such as Figures 1 to 3 As shown, the inner nozzle cap 12, the second nozzle cap 3, the third nozzle cap 13 and the outer nozzle cap 2 are installed at the outlet of the nozzle body 8 from the inside out, and the small nozzle 14 is located inside the inner nozzle cap 12.

[0030] In one embodiment, such as Figures 1 to 3 As shown, the fifth filling port 9 is installed at the inlet of the nozzle body 8 and is connected to the interior; the first filling port 5 is installed on the connector 7 and is connected to the interior; the second filling port 17, the third filling port 16 and the fourth filling port 15 are respectively installed on the nozzle body 8 and are connected to the interior.

[0031] In one embodiment, such as Figures 1 to 3 As shown, the nozzle body 8 is provided with several independent connection channels. The fifth filling port 9 is connected to the small nozzle 14 through the connection channel. The first filling port 5 is connected to the outer nozzle cap 2 through the connection channel. The inner nozzle cap 12, the second nozzle cap 3 and the third nozzle cap 13 are connected to the second filling port 17, the third filling port 16 and the fourth filling port 15 through the connection channels, respectively.

[0032] In one embodiment, such as Figures 1 to 3 As shown, a ring 6 is provided at the inlet of the first filling port 5.

[0033] In one embodiment, such as Figures 1 to 3 As shown, a clamping ring 10 and a transition ring 11 are provided at the connection between the small nozzle 14 and the nozzle body 8.

[0034] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A fuel nozzle for a gas turbine, characterized in that, include: Nozzle body, connector, small nozzle, nozzle cap assembly, and filling port assembly; The connector is sleeved on the nozzle body and communicates with the interior of the nozzle body. The small nozzle is installed at the outlet of the nozzle body. The nozzle cap assembly is installed on the nozzle body and the connector. The filling port assembly is installed on the nozzle body and communicates with the interior of the nozzle body and the small nozzle. The nozzle cap assembly includes: an inner nozzle cap, a second nozzle cap, a third nozzle cap, and an outer nozzle cap; The filling port assembly includes: a first filling port, a second filling port, a third filling port, a fourth filling port, and a fifth filling port.

2. The fuel nozzle for a gas turbine according to claim 1, characterized in that, The nozzle body is provided with a shell.

3. The fuel nozzle for a gas turbine according to claim 1, characterized in that, The nozzle body has a head cover at its outlet, and the head cover is located outside the nozzle cap assembly.

4. The fuel nozzle for a gas turbine according to claim 1, characterized in that, The inner nozzle cap, the second nozzle cap, the third nozzle cap, and the outer nozzle cap are installed at the outlet of the nozzle body from the inside out, and the small nozzle is located inside the inner nozzle cap.

5. The fuel nozzle for a gas turbine according to claim 1, characterized in that, The fifth filling port is installed at the inlet of the nozzle body and is connected to the interior; the first filling port is installed on the connector and is connected to the interior; the second filling port, the third filling port, and the fourth filling port are respectively installed on the nozzle body and are connected to the interior.

6. The fuel nozzle for a gas turbine according to claim 1, characterized in that, The nozzle body is provided with several independent connection channels. The fifth filling port is connected to the small nozzle through the connection channel. The first filling port is connected to the outer nozzle cap through the connection channel. The inner nozzle cap, the second nozzle cap, and the third nozzle cap are respectively connected to the second filling port, the third filling port, and the fourth filling port through the connection channel.

7. The fuel nozzle for a gas turbine according to claim 1, characterized in that, A ring is provided at the inlet of the first filling port.

8. The fuel nozzle for a gas turbine according to claim 1, characterized in that, A clamping ring and a transition ring are provided at the connection between the small nozzle and the nozzle body.

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