Combined gas turbine exhaust diffuser

Abstract

The utility model relates to the technical field of gas turbine parts, in particular to a combined gas turbine exhaust diffuser which comprises an exhaust chamber and a diffusion mechanism, the diffusion mechanism is mounted at the exhaust position of the exhaust chamber, and a supporting seat for supporting the exhaust chamber is connected below the exhaust chamber. The diffusion mechanism comprises a diffuser body, a flow guide component and an exhaust device, the diffuser body is arranged on the right side of the exhaust chamber, the right side of the diffuser body is designed to be of an expanded structure, and a mechanical butt joint mechanism is arranged between the diffuser body and the exhaust chamber. According to the combined type gas turbine exhaust diffuser, the diffuser body is matched with the flow guide component and the exhaust device, exhaust airflow can be effectively guided, exhaust gas can be diffused and exhausted more smoothly and evenly, and high-temperature and high-speed gas can be accurately guided through the flow guide component formed by the flow guide grooves in the inner wall of the diffuser in cooperation with the flow guide pieces.

Description

Technical Field

[0001] This utility model relates to the technical field of gas turbine components, specifically a combined gas turbine exhaust diffuser. Background Technology

[0002] Gas turbines, with their high-efficiency power output, often operate under extreme conditions of high temperature, high pressure, and high speed. This harsh operating environment places extremely high performance demands on all components of the gas turbine, especially the exhaust diffuser. However, existing gas turbine exhaust diffuser designs have some shortcomings:

[0003] On the one hand, the internal flow channel shape is not optimized, resulting in large vortices and backflow areas during exhaust flow. This not only increases exhaust resistance but also reduces exhaust efficiency, significantly diminishing the overall performance of the gas turbine. On the other hand, the connection between the exhaust diffuser's guide components and the main structure is not reasonable. Under prolonged exposure to high temperatures and high-speed, high-pressure airflow, the strength of the connection points gradually decreases, making them prone to loosening and displacement. This directly reduces the stability and reliability of the gas turbine operation, increases the risk of sudden failures, shortens the service life of components, and increases maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a combined gas turbine exhaust diffuser to address the following issues raised in the background: First, the internal flow channel shape is not optimized, resulting in large vortices and backflow areas during exhaust flow. This not only increases exhaust resistance but also reduces exhaust efficiency, significantly diminishing the overall performance of the gas turbine. Second, the connection method between the diffuser's guide components and the main structure is not reasonable. Under prolonged exposure to high temperatures and high-speed, high-pressure airflow, the strength of the connection points gradually decreases, making them prone to loosening and displacement. This directly reduces the stability and reliability of the gas turbine operation, increases the risk of sudden failures, and results in short component lifespan and high maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a combined gas turbine exhaust diffuser, comprising an exhaust chamber and a diffusion mechanism. The diffusion mechanism is installed at the exhaust position of the exhaust chamber, and a support base is connected below the exhaust chamber to provide support for it. The diffusion mechanism includes a diffuser body, a flow guiding component, and an exhaust device. The diffuser body is located on the right side of the exhaust chamber, and the right side of the diffuser body has an enlarged structural design. A mechanical docking mechanism is provided between the diffuser body and the exhaust chamber, and the diffuser body is interconnected with the exhaust chamber through the mechanical docking mechanism. The exhaust device is located in the middle of the diffuser body, and the horizontal center line of the exhaust device coincides with the horizontal center line of the diffuser body. A flow guiding component is provided on the inner side of the diffuser body to guide the exhaust gas emission.

[0006] To further optimize this technical solution, the mechanical docking mechanism includes a connecting flange, which has a double-layer structure with inner and outer rings. The rear end of the connecting flange is the inner ring, the outer ring of the connecting flange is evenly provided with outer ring screw holes, and the inner ring of the connecting flange is evenly provided with inner ring screw holes. The inner ring screw holes and the outer ring screw holes are respectively connected to the exhaust chamber and the diffuser body.

[0007] To further optimize this technical solution, a flange bolt hole is provided on the front side of the exhaust chamber, and the flange bolt hole on the front side of the exhaust chamber corresponds to the inner ring bolt hole.

[0008] To further optimize this technical solution, a connector is fixed at the rear end of the diffuser body. The connector has a ring structure design, and a flange connection hole corresponding to the outer ring screw hole is opened on the surface of the connector, so that the diffuser body and the exhaust chamber are connected stably through the connecting flange.

[0009] To further optimize this technical solution, the flow guiding component includes a flow guiding plate, a flow guiding block, and a flow guiding groove;

[0010] The guide vanes are evenly distributed on the inner side of the diffuser body;

[0011] A flow guide block is fixed to the end of the flow guide plate;

[0012] The flow guide channel is formed on the inner surface of the diffuser body, and the flow guide channel and the flow guide block are set to correspond to each other. The flow guide block slot is installed into the interior of the flow guide channel.

[0013] To further optimize this technical solution, the exhaust device includes exhaust blades, blade retaining blocks, a main shaft, and a connecting groove;

[0014] Exhaust blades are evenly distributed in the middle of the diffuser body;

[0015] A blade retainer is installed at the end of the exhaust blade, and the side view of the blade retainer is enlarged.

[0016] The main shaft is located in the middle of the diffuser body;

[0017] A connecting groove is formed on the surface of the main shaft, and the blade retainer is inserted into the main shaft through the connecting groove to form a connection.

[0018] To further optimize this technical solution, a connecting ring is fixed to the outside of the exhaust blade to enable synchronous insertion and control of the exhaust blade.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] (1) By setting the diffuser body in conjunction with the flow guiding component and the exhaust device, the exhaust airflow can be effectively guided, so that the exhaust can be diffused and discharged more smoothly and evenly. The flow guiding groove on the inner wall of the diffuser, together with the flow guiding plate, forms a flow guiding component that can accurately guide the high temperature and high speed gas.

[0021] (2) The flow guide is installed firmly and can be adjusted flexibly by connecting the flow guide block and the flow guide groove at the lower end of the flow guide. The diffuser and the exhaust chamber are connected by connecting flanges and bolts, which are tight and firm and easy to replace later. At the same time, the slot connection between the flow guide and the diffuser, and the exhaust blade and the main shaft are easy to install and easy to maintain later. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the diffuser body of this utility model;

[0025] Figure 4 This is a schematic diagram of the main structure of the diffuser body of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the connecting flange of this utility model;

[0027] Figure 6 This is a side view of the connecting flange structure of this utility model;

[0028] Figure 7 This is a three-dimensional structural diagram of the exhaust device of this utility model;

[0029] Figure 8 This is a side view of the main body of the diffuser of this utility model;

[0030] Figure 9 This is a side view of the connector structure of this utility model;

[0031] Figure 10 This is a three-dimensional structural diagram of the guide vane of this utility model;

[0032] Figure 11 This is a three-dimensional structural diagram of the exhaust blade of this utility model;

[0033] Figure 12 This is a side view of the main shaft structure of this utility model;

[0034] Figure 13 This is a side view of the exhaust blade structure of this utility model.

[0035] In the diagram: 1. Exhaust chamber; 101. Flange bolt hole; 2. Connecting flange; 201. Outer ring bolt hole; 202. Inner ring bolt hole; 3. Diffuser body; 301. Connector; 302. Flow guide groove; 303. Flange connection hole; 4. Support base; 5. Flow guide component; 501. Flow guide vane; 502. Flow guide block; 6. Exhaust device; 601. Exhaust blade; 602. Blade block; 603. Main shaft; 604. Connecting groove; 605. Connecting ring. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1: This utility model provides the following technical solution: Figure 1-3 As shown, a combined gas turbine exhaust diffuser includes an exhaust chamber 1 and a diffusion mechanism. The diffusion mechanism is installed at the exhaust position of the exhaust chamber 1, and a support base 4 is connected below the exhaust chamber 1 to provide support for it. The diffusion mechanism includes a diffuser body 3, a flow guide component 5, and an exhaust device 6. The diffuser body 3 is located on the right side of the exhaust chamber 1, and the right side of the diffuser body 3 has an enlarged structure design. A mechanical docking mechanism is provided between the diffuser body 3 and the exhaust chamber 1, and the diffuser body 3 is interconnected with the exhaust chamber 1 through the mechanical docking mechanism. The exhaust device 6 is located in the middle of the diffuser body 3, and the horizontal center line of the exhaust device 6 coincides with the horizontal center line of the diffuser body 3. A flow guide component 5 is provided on the inner side of the diffuser body 3 to guide the exhaust gas emission.

[0038] The exhaust chamber 1 is located at the rear end of the gas turbine and is made of high-temperature resistant material. The exhaust chamber 1 is stably supported by the support base 4. The rear end of the exhaust chamber 1 is connected to the diffuser body 3 through a mechanical docking mechanism. The exhaust gas is guided by the diffuser body 3. The flow guiding component 5 and the exhaust device 6 installed in the diffuser body 3 can effectively guide the airflow and make its emission more uniform.

[0039] Example 2: Based on Example 1, as follows Figure 4-7 and Figure 9 As shown, the mechanical docking mechanism further discloses a connecting flange 2, which has a double-layer structure with inner and outer rings. The rear end of the connecting flange 2 is the inner ring. The outer ring of the connecting flange 2 is evenly provided with outer ring screw holes 201, and the inner ring of the connecting flange 2 is evenly provided with inner ring screw holes 202. The inner ring screw holes 202 and the outer ring screw holes 201 are respectively connected to the exhaust chamber 1 and the diffuser body 3. The front side of the exhaust chamber 1 is provided with flange screw holes 101, and the flange screw holes 101 on the front side of the exhaust chamber 1 correspond to the inner ring screw holes 202. The rear end of the diffuser body 3 is fixed with a connector 301, which has a ring structure design. The surface of the connector 301 is provided with flange connection holes 303 corresponding to the outer ring screw holes 201, so that the diffuser body 3 and the exhaust chamber 1 are connected stably through the connecting flange 2.

[0040] The connecting flange 2 is connected to the exhaust chamber 1 through the mating of the flange bolt hole 101 and the inner ring bolt hole 202. The connector 301 is stepped. After the connector 301 is installed on the front end of the connecting flange 2, the flange connecting hole 303 and the outer ring bolt hole 201 match each other, and bolts are inserted for connection and fixation, so that the diffuser body 3 can be stably installed and fixed.

[0041] Example 3: Based on Example 1, as follows Figure 8-13As shown, the flow guiding component 5 further discloses a flow guiding plate 501, a flow guiding block 502, and a flow guiding groove 302. The flow guiding plate 501 is evenly distributed on the inner side of the diffuser body 3. The flow guiding block 502 is fixed to the end of the flow guiding plate 501. The flow guiding groove 302 is formed on the inner surface of the diffuser body 3, and the flow guiding groove 302 and the flow guiding block 502 are correspondingly arranged. The flow guiding block 502 is installed in a slot into the interior of the flow guiding groove 302. The exhaust device 6 includes an exhaust blade 601, a blade block 602, a main shaft 603, and... A connecting groove 604 and an exhaust blade 601 are evenly distributed in the middle of the diffuser body 3. A blade retainer 602 is set at the end of the exhaust blade 601, and the side view of the blade retainer 602 is enlarged. A main shaft 603 is set in the middle of the diffuser body 3. A connecting groove 604 is opened on the surface of the main shaft 603. The blade retainer 602 is inserted into the main shaft 603 through the connecting groove 604 to form a connection. A connecting ring 605 is fixed to the outside of the exhaust blade 601 to control the synchronous insertion of the exhaust blade 601.

[0042] A flow channel is formed inside the diffuser body 3 by several flow guides 501. The flow guide block 502 at the end of the flow guide 501 is made of elastic material, which facilitates the insertion and connection of the flow guide block 502 and the flow guide groove 302. The lower end of the exhaust blade 601 is connected to the connecting groove 604 on the main shaft 603 through the blade block 602. The front end of the main shaft 603 is provided with a shielding component to prevent the blade block 602 from falling off along the front side. Multiple sets of exhaust blades 601 can be connected to each other through the connecting ring 605, which facilitates the overall insertion and control.

[0043] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined gas turbine exhaust diffuser, comprising an exhaust chamber (1) and a diffusion mechanism, wherein the diffusion mechanism is installed at the exhaust position of the exhaust chamber (1), and a support base (4) is connected below the exhaust chamber (1) to provide support thereto; characterized in that The diffusion mechanism includes a diffuser body (3), a flow guide (5), and an exhaust device (6). The diffuser body (3) is located on the right side of the exhaust chamber (1), and the right side of the diffuser body (3) is designed to be enlarged. A mechanical docking mechanism is provided between the diffuser body (3) and the exhaust chamber (1). The diffuser body (3) is connected to the exhaust chamber (1) through the mechanical docking mechanism. The exhaust device (6) is located in the middle of the diffuser body (3), and the horizontal center line of the exhaust device (6) coincides with the horizontal center line of the diffuser body (3). A flow guide (5) is provided on the inner side of the diffuser body (3) to guide the exhaust gas.

2. A combined gas turbine exhaust diffuser according to claim 1 wherein: The mechanical docking mechanism includes a connecting flange (2), which has a double-layer structure with inner and outer rings. The rear end of the connecting flange (2) is the inner ring. The outer ring of the connecting flange (2) is evenly provided with outer ring screw holes (201), and the inner ring of the connecting flange (2) is evenly provided with inner ring screw holes (202). The inner ring screw holes (202) and the outer ring screw holes (201) are respectively connected to the exhaust chamber (1) and the diffuser body (3).

3. A combined gas turbine exhaust diffuser according to claim 2 wherein: The front side of the exhaust chamber (1) is provided with a flange bolt hole (101), and the flange bolt hole (101) on the front side of the exhaust chamber (1) corresponds to the inner ring bolt hole (202).

4. A combined gas turbine exhaust diffuser according to claim 2 or 3, characterised in that: The diffuser body (3) is fixed with a connector (301) at its rear end. The connector (301) has a ring structure design and a flange connection hole (303) corresponding to the outer ring screw hole (201) is opened on the surface of the connector (301). The diffuser body (3) and the exhaust chamber (1) are connected to form a stable connection through the connecting flange (2).

5. A combined gas turbine exhaust diffuser according to claim 1 wherein: The flow guiding component (5) includes a flow guiding plate (501), a flow guiding block (502), and a flow guiding groove (302); The guide vanes (501) are evenly distributed on the inner side of the diffuser body (3); A flow guide block (502) is fixed to the end of the flow guide plate (501); A flow guide groove (302) is formed on the inner surface of the diffuser body (3), and the flow guide groove (302) and the flow guide block (502) are arranged correspondingly to each other, and the slot of the flow guide block (502) is installed inside the flow guide groove (302).

6. A combined gas turbine exhaust diffuser according to claim 1 wherein: The exhaust device (6) includes an exhaust blade (601), a blade retainer (602), a main shaft (603), and a connecting groove (604); Exhaust blades (601) are evenly distributed in the middle of the diffuser body (3); A blade retainer (602) is provided at the end of the exhaust blade (601), and the side view section of the blade retainer (602) is enlarged. The main shaft (603) is located in the middle of the diffuser body (3); A connecting groove (604) is formed on the surface of the main shaft (603), and the blade retainer (602) is inserted into the main shaft (603) through the connecting groove (604) to form a connection.

7. A combined gas turbine exhaust diffuser according to claim 6 wherein: A connecting ring (605) is fixed to the outside of the exhaust blade (601) to synchronously control the insertion and connection of the exhaust blade (601).

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