Air inlet system of multi-shaft gas turbine

Abstract

The utility model provides an air inlet system of a multi-shaft gas turbine and aims to solve the problems that a traditional multi-shaft gas turbine is limited in spatial layout and not compact enough in structure. The air inlet system of the multi-shaft gas turbine mainly comprises the air inlet pipeline, the cooling fan, the heat exchanger and the multi-shaft gas turbine, air inlet cooling of the multi-shaft gas turbine is achieved through layout connection of the air inlet pipeline with air inlet on one side and air exhaust on the two sides, the cooling fan and the heat exchanger, and therefore the air inlet system of the multi-shaft gas turbine is more compact in structure and more compact in structure. And the spatial layout of vehicles and ships is more flexible.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbines, in particular to an air intake system for a multi-shaft gas turbine. Background Art

[0002] Multi-shaft gas turbines are widely used in automotive and ship propulsion fields due to their small size, light weight and high power density.

[0003] Usually, the air intake system of a multi-shaft gas turbine includes low-pressure and high-pressure shafts. After the air is compressed by the low-pressure shaft, its temperature tends to rise to a high level, which is not conducive to the efficiency of the high-pressure shaft. Therefore, the air intake system needs to use a heat exchanger to cool the air after the first-stage compression. However, for gas turbines arranged on vehicles or ships, the space layout is limited, which poses a huge challenge to the compact layout of the air intake system. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned prior art, the present application provides a multi-shaft gas turbine air intake system, which realizes air intake cooling of the multi-shaft gas turbine by connecting the air intake duct with air intake on one side and exhaust on both sides with the layout of the cooling fan and the heat exchanger, making the multi-shaft gas turbine air intake system structure more compact and more flexible in the spatial layout of vehicles and ships.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A multi-shaft gas turbine air intake system comprises a first gas turbine, a second gas turbine and an air intake system component connecting the two, the air intake system component comprises an air intake pipe, a heat exchanger and an air intake cover in sequence, the air intake pipe has an inlet arranged at the bottom and connected to the first gas turbine, and an outlet arranged at the top and connected to the inlet of the heat exchanger, the outlet of the heat exchanger is connected to the second gas turbine through the air intake cover, and a cooling fan is also connected to one side of the heat exchanger.

[0007] Furthermore, the air intake duct has a duct inlet located at the bottom and two duct outlets forked at the top, the heat exchanger has a high-pressure side inlet, a high-pressure side outlet, a low-pressure side inlet and a low-pressure side outlet, the air intake cover has two corresponding cover inlets, the duct outlet of the air intake duct is connected to the high-pressure side inlet of the heat exchanger, the cooling fan is connected to the low-pressure side inlet of the heat exchanger, and the low-pressure side outlet of the heat exchanger is connected to the two cover inlets of the air intake cover.

[0008] Furthermore, the first gas turbine and the second gas turbine each include a compressor and a turbine.

[0009] Furthermore, the compressor of the first gas turbine is arranged in the pipeline inlet of the air intake pipeline.

[0010] Furthermore, the compressor of the second gas turbine is arranged in the casing inlet of the air intake casing.

[0011] Furthermore, the heat exchanger is a plate-fin type or a main surface type heat exchanger.

[0012] Furthermore, the cooling fan is an axial flow fan.

[0013] Furthermore, the cooling fan is connected to one side of the heat exchanger close to the air intake duct, and the cooling fan is arranged between two duct inlets at the top of the air intake duct.

[0014] The beneficial effects of the utility model are as follows:

[0015] Compared with the prior art, the multi-shaft gas turbine air intake system provided by the utility model is structurally designed to connect the air intake duct with air intake on one side and exhaust on both sides with the layout of the cooling fan and the heat exchanger to achieve air intake cooling of the multi-shaft gas turbine, making the multi-shaft gas turbine air intake system of the utility model more compact in structure and more flexible in the spatial layout of vehicles and ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is the front view of the utility model;

[0019] Figure 4 It is a structural diagram of the utility model when viewed from above.

[0020] Among them: 1. first gas turbine; 2. second gas turbine; 11. compressor; 12. turbine; 3. air intake duct; 31. duct inlet; 32. duct outlet; 4. heat exchanger; 5. air intake cover; 6. cooling fan. DETAILED DESCRIPTION

[0021] The specific implementation of the present utility model is described below in conjunction with the accompanying drawings.

[0022] The utility model provides an air intake system for a multi-shaft gas turbine, aiming to solve the problems of limited space layout and insufficiently compact structure of a traditional multi-shaft gas turbine.

[0023] like Figures 1 to 4As shown, the utility model includes an air intake duct 3, a cooling fan 6, a heat exchanger 4, a first gas turbine 1, a second gas turbine 2 and an air intake casing 5; wherein the air intake duct 3 has a duct inlet 31 and two duct outlets 32; the heat exchanger 4 has a high-pressure side inlet, a high-pressure side outlet, a low-pressure side inlet and a low-pressure side outlet; wherein each gas turbine includes a compressor 11 and a turbine 12, and the air intake casing 5 has two casing inlets.

[0024] In one embodiment of the utility model, the distance between the pipe inlet 31 of the air intake pipe 3 and the bottom wall is not less than the radius of the inlet, the pipe outlet 32 ​​of the air intake pipe 3 is located on both sides of the top, the pipe inlet 31 of the air intake pipe 3 is connected to the atmosphere, and the pipe outlet 32 ​​of the air intake pipe 3 is connected to the high-pressure side inlet of the heat exchanger 4.

[0025] In one embodiment of the utility model, the cooling fan 6 is located between the two pipe outlets 32 of the air inlet pipe 3, and the cooling fan 6 is preferably an axial flow fan. The cooling fan 6 is connected to the low-pressure side inlet of the heat exchanger 4;

[0026] In one embodiment of the present invention, the low-pressure side outlet of the heat exchanger 4 is connected to two casing inlets of the air intake casing 5 , wherein the heat exchanger 4 can be a plate-fin type or a main surface type heat exchanger 4 .

[0027] In one embodiment of the present invention, the compressor 11 of the first gas turbine 1 is located in the pipeline inlet 31 of the air intake pipeline 3 , and the compressor 11 of the second gas turbine 2 is located in the casing inlet of the air intake casing 5 .

[0028] The working principle of the utility model is as follows: first, air enters the air intake duct 3, is pressurized and heated by the compressor 11 of the first gas turbine 1, and the high-pressure and high-temperature gas enters the heat exchanger 4 for cooling, and then enters the air intake housing 5. The cold side air of the heat exchanger 4 comes from the cold air sucked from the atmosphere driven by the fan, and finally the high-pressure and low-temperature air enters the second gas turbine 2 for work. In terms of structural design, the air intake duct 3 with air intake on one side and exhaust on both sides is connected with the layout of the cooling fan 6 and the heat exchanger 4 to realize the air intake cooling of the multi-axis gas turbine, making the air intake system of the multi-axis gas turbine of the utility model more compact and more flexible in the space layout of vehicles and ships.

[0029] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A multi-shaft gas turbine air intake system, characterized in that: The invention comprises a first gas turbine (1), a second gas turbine (2) and an air intake system component connecting the two, wherein the air intake system component comprises an air intake pipe (3), a heat exchanger (4) and an air intake casing (5) in sequence, wherein the pipe inlet (31) of the air intake pipe (3) is arranged at the bottom and connected to the first gas turbine (1), and the pipe outlet (32) is arranged at the top and connected to the inlet of the heat exchanger (4), the outlet of the heat exchanger (4) is connected to the second gas turbine (2) through the air intake casing (5), and a cooling fan (6) is also connected to one side of the heat exchanger (4).

2. A multi-shaft gas turbine air intake system according to claim 1, characterized in that: The air intake duct (3) has a duct inlet (31) located at the bottom and two duct outlets (32) located at the top and branched; the heat exchanger (4) has a high-pressure side inlet, a high-pressure side outlet, a low-pressure side inlet and a low-pressure side outlet; the air intake casing (5) has two corresponding casing inlets; the duct outlet (32) of the air intake duct (3) is connected to the high-pressure side inlet of the heat exchanger (4); the cooling fan (6) is connected to the low-pressure side inlet of the heat exchanger (4); and the low-pressure side outlet of the heat exchanger (4) is connected to the two casing inlets of the air intake casing (5).

3. The multi-shaft gas turbine air intake system according to claim 1, characterized in that: The first gas turbine (1) and the second gas turbine (2) each include a compressor (11) and a turbine (12).

4. A multi-shaft gas turbine air intake system as claimed in claim 3, characterized in that: The compressor (11) of the first gas turbine (1) is arranged in a pipeline inlet (31) of the air intake pipeline (3).

5. The multi-shaft gas turbine air intake system according to claim 3, characterized in that: The compressor (11) of the second gas turbine (2) is arranged in a casing inlet of an air intake casing (5).

6. The multi-shaft gas turbine air intake system according to claim 1, characterized in that: The heat exchanger (4) is a plate-fin type or main surface type heat exchanger.

7. The multi-shaft gas turbine air intake system according to claim 1, characterized in that: The cooling fan (6) is an axial flow fan.

8. The multi-shaft gas turbine air intake system according to claim 1, characterized in that: The cooling fan (6) is connected to a side of the heat exchanger (4) close to the air intake duct (3), and the cooling fan (6) is arranged between two duct inlets (31) at the top of the air intake duct (3).

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