CN115263557A - Heavy gas turbine admits air and uses water conservancy diversion structure - Google Patents
Heavy gas turbine admits air and uses water conservancy diversion structure Download PDFInfo
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- CN115263557A CN115263557A CN202211063823.XA CN202211063823A CN115263557A CN 115263557 A CN115263557 A CN 115263557A CN 202211063823 A CN202211063823 A CN 202211063823A CN 115263557 A CN115263557 A CN 115263557A
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- flow guide
- shell
- gas turbine
- guide part
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention belongs to the technical field of gas turbines, and discloses a flow guide structure for heavy gas turbine air inlet, which comprises a shell, wherein the shell is provided with an air inlet and an air outlet which are vertical to each other; an inner flow guide part extending towards the air outlet direction is arranged on the inner wall of the shell opposite to the air outlet, the inner flow guide part is in a circular truncated cone shape, and the large end of the inner flow guide part is connected with the inner wall of the shell; the inner wall of the shell is provided with a guide plate, so that gas entering from the gas inlet sequentially passes through the gas outlet and the outer flow guide part after being guided by the guide plate and the inner flow guide part, and then flows out uniformly and stably. The invention combines the air inlet steering and the flow guiding into a whole through the flow guiding structure with a special structure, has compact structure, can realize the function in a narrow space, and can evenly and smoothly flow the air flow passing through the flow guiding structure into the gas turbine, thereby improving the efficiency of the gas turbine.
Description
Technical Field
The invention belongs to the technical field of gas turbines, and particularly relates to a flow guide structure for air inlet of a heavy-duty gas turbine.
Background
On the premise that energy conservation, environmental protection and sustainable development are advocated in China, the development situation of a gas power plant is increasingly high, the total installation quantity of a global gas turbine is also continuously expanded, and the rising of an auxiliary engine system of the gas turbine is promoted. The air inlet filtering system of the gas turbine is one of the most important auxiliary machines and is used as the only defense line for outside air to enter the gas turbine, and the main function is to provide clean air meeting the requirements for the gas turbine through measures such as filtering, dehumidification and the like, so that the normal operation of the gas turbine is ensured.
Heavy duty gas turbines are typically designed at high altitudes due to their air intake requirements, while gas turbines are typically located near ground level. The height difference exists between the two, and the gas turbine air inlet (2) is generally horizontally arranged, so the air inlet filtering system must be provided with a flow passage from the vertical direction to the horizontal direction. Meanwhile, the requirement of the air inlet quantity of the heavy-duty gas turbine enables the air inlet structure size to be larger than that of a gas turbine impeller, so that the condition that the flow channel of inlet air flow is reduced before the inlet air flow enters the gas turbine is solved. Without proper structure, equipment to direct the airflow entering the gas turbine, the turbulent airflow tends to have an effect on the efficiency of the gas turbine. Furthermore, many common solutions are difficult to work with due to the presence of gas turbines and power generation equipment, which greatly limit the size of the flow path space.
When the airflow changes from the vertical direction to the horizontal direction, airflow turbulence is easily generated due to the fact that the airflow impacts the wall surface, airflow disturbance is caused, and energy loss is generated. The conventional flow channel is directed at a 90 degree corner, and an arc-shaped turn similar to a 90 degree elbow of the pipeline is generally selected to reduce the disturbance of the airflow. However, the flow passage in this manner requires a certain turning radius, which limits the use of the heavy-duty gas turbine due to the small space. In addition, the flow path entering the gas turbine from the inlet flow path contracts, and due to space constraints, if it contracts directly, the flow path angle will be very small and change very dramatically. The impeller blades of the gas turbine and the outer shell of the gas turbine need to be matched with a proper air inlet angle to ensure the efficiency of the gas turbine.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a flow guide structure for air inlet of a heavy-duty gas turbine, and aims to solve the problem of how to ensure that airflow uniformly and stably enters the gas turbine through a narrow air inlet channel of the heavy-duty gas turbine.
In order to achieve the purpose, the invention provides a flow guide structure for air inlet of a heavy-duty gas turbine, which comprises a shell, wherein the top of the shell is provided with an air inlet, the side wall of the shell is provided with an air outlet which is vertical to the direction of the air inlet, the air outlet is connected with an outer flow guide part which extends towards the outside of the shell and is used for being matched with the air inlet end of the heavy-duty gas turbine, the outer flow guide part is in a circular truncated cone shape, and the large end of the outer flow guide part is connected with the air outlet; an inner flow guide part extending towards the air outlet is arranged on the inner wall of the shell opposite to the air outlet, the inner flow guide part is in a circular truncated cone shape, and the large end of the inner flow guide part is connected with the inner wall of the shell; the inner wall of the shell is provided with a guide plate, so that gas entering from the gas inlet sequentially passes through the gas outlet and the outer flow guide part after being guided by the guide plate and the inner flow guide part, and the gas uniformly and stably flows out.
Preferably, the guide plate comprises first curved plate, second curved plate and the third curved plate that are crescent, the long arc limit of second curved plate with the short arc limit of first curved plate is connected, the short arc limit of second curved plate with the long arc limit of third curved plate is connected, the long arc limit of first curved plate with the short arc limit of third curved plate all with shell inner wall connects.
Further preferably, the short arc edge of the third curved plate is arc-shaped and coincides with the edge of the air outlet.
Preferably, the outer flow guide part and the inner flow guide part are coaxially arranged.
Preferably, a small end of the inner flow guide part extends out of the air outlet.
Preferably, the shell is provided with a through hole, and the through hole is detachably and hermetically connected with the large end of the inner flow guide part.
Preferably, the bottom surface of the shell is an arc surface.
Preferably, a plurality of supporting parts are arranged inside the shell and used for supporting the inner wall of the shell.
Preferably, the bottom of the shell is provided with a drain hole.
Preferably, the housing is provided with an openable and closable service window.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects: according to the invention, the diversion component is additionally arranged in the shell flow passage for air inlet diversion, and the air inlet diversion structure and the diversion structure are combined into a whole, so that the structure is compact, the device can simultaneously complete diversion and diversion of air flow in a narrow space, the air flow can uniformly and stably enter the gas turbine in a proper direction, and the air flow with a proper angle is provided in a limited space on the premise of meeting the requirement of flow passage contraction, so that the pressure loss generated by gas disturbance is reduced, and the efficiency of the gas turbine is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a view angle of a flow guiding structure for air intake of a heavy duty gas turbine according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another view angle of the air inlet flow guide structure of the heavy duty gas turbine according to the embodiment of the invention;
FIG. 3 is a front view of a flow guiding structure for air intake of a heavy duty gas turbine according to an embodiment of the present invention;
FIG. 4 is a sectional view of a flow guide structure for air intake of a heavy duty gas turbine according to an embodiment of the present invention;
FIG. 5 is a top view of a flow guiding structure for air intake of a heavy duty gas turbine according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a baffle according to an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same elements or structures, wherein:
1-a housing; 2-an air inlet; 3-air outlet; 4-an outer flow guide part; 5-an inner flow guide part; 6-guide plate, 61-first curved plate, 62-second curved plate, 63-third curved plate; 7-a support; 8-a drain hole; 9-maintenance window.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1 to 5, the present invention provides a flow guiding structure for air intake of a heavy duty gas turbine, including: the air conditioner comprises a shell 1, an outer flow guide part 4, an inner flow guide part 5 and a flow guide plate 6. An air inlet 2 and an air outlet 3 are arranged on the shell 1, the air inlet 2 and the air outlet 3 are vertical, and the air flow entering from the air inlet 2 flows out from the air outlet 3 after being turned by 90 degrees in the flow guide structure. The outer flow guide part 4 is connected with the gas outlet 3 and is positioned outside the shell 1, the inner flow guide part 5 and the flow guide plate 6 are positioned inside the shell 1 and are connected with the inner wall of the shell 1, and gas entering the flow guide structure shell 1 from the gas inlet 2 sequentially passes through the gas outlet 3 and the outer flow guide part 4 after being guided by the flow guide plate 6 and the inner flow guide part 5 to uniformly and stably flow out.
The technical solution described above is explained in detail below with reference to specific examples.
Referring to fig. 4, the air inlet 2 is arranged at the top end of the housing 1, and the air flow enters the flow guide structure; the air outlet 3 is arranged on the side wall of the shell 1 and is vertical to the air inlet 2. Referring to fig. 3, in the embodiment, the shape of the housing 1 is that the bottom surface is modified into an arc surface on the basis of a cuboid, and the bottom is of an arc structure, which is beneficial to flow guiding, so that the air flow flows out to the air outlet 3 more uniformly. The rectangular cross-section of the upper part of the housing 1 is longer and narrower in width. The longer length is required to meet the requirement of the air inlet flow of the heavy-duty gas turbine, and the narrower width is caused by the structural limitation of the gas turbine.
Referring to fig. 2 and 6, the guide plate 6 is disposed on the inner wall of the housing 1, and may be composed of three parts, i.e., a first curved plate 61, a second curved plate 62 and a third curved plate 63, which are crescent-shaped, the long arc edge of the second curved plate 62 is welded to the short arc edge of the first curved plate 61, the short arc edge of the second curved plate 62 is welded to the long arc edge of the third curved plate 63, the long arc edge of the first curved plate 61 and the short arc edge of the third curved plate 63 are welded to the inner wall of the housing 1, i.e., the guide plate 6 and the inner wall of the housing 1 enclose an internal hollow structure, and the guide plate 6 is welded to the inner wall of the housing 1. The first curved plate 61 and the third curved plate 63 are curved structures formed by cutting off the conical shell, and the curved structure of the second curved plate 62 is formed by pressing. Preferably, the flow guiding plate 6 is arranged above and close to the air outlet 3, and the short arc edge of the third curved plate 63 is arc-shaped and coincides with the edge of the air outlet 3. Through simulation tests, the special surface shape of the guide plate 6 can better guide airflow to turn, so that when the airflow flows through the structure, the kinetic energy loss of the airflow can be reduced as much as possible, and the airflow has a more uniform flow field at the air outlet 3; simultaneously, this structure has still increased the turning radius of air current for the air current turns more smoothly evenly.
Referring to fig. 1, 4 and 5, the inner guiding portion 5 is a truncated cone, is disposed on the inner wall of the housing 1 opposite to the air outlet 3 and extends toward the air outlet 3, and has a large end connected to the inner wall of the housing 1 and a small end extending out of the air outlet 3, i.e., the height of the inner guiding portion 5 is greater than the width of the cross section of the housing 1, so that the air flow in the guiding structure can be guided out of the air outlet 3 more smoothly. The inner flow guiding part 5 guides flow through the outer curved surface thereof and is a main flow guiding part of the flow guiding structure. The inner diversion part 5 can be a hollow structure or a solid structure, and in order to save processing materials, the diversion structure is lighter in weight and is preferably of a hollow structure. The air flow in the flow guide structure only needs not to enter the inner part of the inner flow guide part 5, and the two ends of the inner flow guide part 5 can be closed; or only the small end is closed, the large end is detachably and hermetically connected with the through hole formed in the shell 1, specifically, a flange is arranged on the large end side and is in bolted connection with the flange at the through hole on the shell 1, and the flange connection part is provided with a sealing structure to ensure that air flow is not leaked from the flange connection part. The detachable structure is convenient to enter the flow guide structure from the position to clean when necessary. The inner flow guide part 5 has the following functions: firstly, the air flow is guided to completely turn, and the air inlet in the vertical direction is guided to be the air outlet in the horizontal direction; secondly, through the cooperation with the arc structure and the gas outlet 3 of shell 1 bottom, carry out preliminary shrink with the export runner, this kind of shrink make full use of original runner space and do not additionally occupy the exterior space, can move smoothly under narrow and small space.
Referring to fig. 1, 4 and 5, the outer guiding portion 4 may be a truncated cone formed by pressing a steel plate, two ends of the outer guiding portion are open, a large end of the outer guiding portion is connected to the air outlet 3, a small end of the outer guiding portion extends to the outside of the casing 1, the diameter of the large end of the outer guiding portion 4 is the same as that of the air outlet, and the specific size of the outer guiding portion 4 needs to be calculated according to the air inlet angle of the gas turbine. The height of the outer guiding part 4 is lower than that of the inner guiding part 5, and the outer guiding part is used as a guiding channel of the outlet of the guiding structure and is used for finally guiding the airflow. Meanwhile, the inclination angle of the curved surface of the outer flow guide part 4 is adapted to the proper air inlet angle of the gas turbine, so that the air flow enters the gas turbine at the angle most suitable for the gas turbine during air inlet. Preferably, referring to fig. 3, the outer flow guiding part 4 is coaxially arranged with the inner flow guiding part 5, which is more advantageous for flow guiding.
Referring to fig. 1 or 2, since the housing 1 of the diversion structure is relatively large in size in practical application, in order to prevent the housing 1 from being deformed, it is preferable to provide a plurality of support portions 7 inside the housing 1 for supporting the inner wall of the housing 1. Specifically, the supporting portion 7 may be a steel pipe, and a plurality of steel pipes are disposed in parallel between two sidewalls of the housing 1.
Referring to fig. 1, since the liquid may be condensed due to the change of the pressure of the flow channel in the guide structure, a small drain hole 8 is provided at the bottom of the housing 1 for discharging the liquid inside the guide structure.
As a preferred embodiment, as shown in fig. 2, an openable and closable maintenance window 9 may be provided on the casing 1 to facilitate maintenance of the inside of the flow guide structure, and the maintenance window 9 should be closed when the flow guide structure is in operation.
By applying the technical scheme, the invention provides the flow guide structure which is simple in structure and easy to process and install for the heavy-duty gas turbine. Through in the casing runner that the admission turned to, increase the water conservancy diversion part, turn to the structure of turning to with the water conservancy diversion with the admission two into one, make compact structure, make the device only utilize narrow and small space, just can realize turning to and the water conservancy diversion to the air current simultaneously, guarantee that the air current is according to suitable direction, evenly, get into gas turbine steadily, and in the restriction space, satisfy under the prerequisite of runner shrink, provide the air current that admits air of suitable angle, reduce the loss of pressure that gas disturbance produced, and then promote gas turbine efficiency.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a heavy gas turbine admits air and uses water conservancy diversion structure which characterized in that: the gas turbine comprises a shell (1), wherein the top of the shell (1) is provided with a gas inlet (2), the side wall of the shell (1) is provided with a gas outlet (3) which is vertical to the direction of the gas inlet (2), the gas outlet (3) is connected with an outer flow guide part (4) which extends towards the outside of the shell (1) and is used for being matched with the gas inlet end of a heavy-duty gas turbine, the outer flow guide part (4) is in a circular truncated cone shape, and the large end of the outer flow guide part is connected with the gas outlet (3); an inner flow guide part (5) extending towards the air outlet (3) is arranged on the inner wall of the shell (1) opposite to the air outlet (3), the inner flow guide part (5) is in a circular truncated cone shape, and the large end of the inner flow guide part is connected with the inner wall of the shell (1); the inner wall of the shell (1) is provided with a guide plate (6), so that gas entering from the air inlet (2) sequentially passes through the air outlet (3) and the outer flow guide part (4) after being guided by the guide plate (6) and the inner flow guide part (5) to uniformly and stably flow out.
2. The flow guide structure for air intake of heavy duty gas turbine according to claim 1, wherein: guide plate (6) comprise first curved plate (61), second curved plate (62) and third curved plate (63) that are crescent, the long arc limit of second curved plate (62) with the short arc limit of first curved plate (61) is connected, the short arc limit of second curved plate (62) with the long arc limit of third curved plate (63) is connected, the long arc limit of first curved plate (61) with the short arc limit of third curved plate (63) all with shell (1) inner wall connection.
3. The flow guide structure for air intake of heavy duty gas turbine according to claim 2, wherein: the short arc edge of the third curved plate (63) is arc-shaped and is overlapped with the edge of the air outlet (3).
4. The flow guide structure for air intake of heavy duty gas turbine as claimed in claim 1, wherein: the outer flow guide part (4) and the inner flow guide part (5) are coaxially arranged.
5. The flow guide structure for air intake of heavy duty gas turbine according to claim 1, wherein: the small end of the inner flow guide part (5) extends out of the air outlet (3).
6. The flow guide structure for air intake of heavy duty gas turbine as claimed in claim 1, wherein: the shell (1) is provided with a through hole, and the through hole is detachably and hermetically connected with the large end of the inner flow guide part (5).
7. The flow guide structure for air intake of heavy duty gas turbine according to claim 1, wherein: the bottom surface of the shell (1) is an arc surface.
8. The flow guide structure for air intake of heavy duty gas turbine according to claim 1, wherein: the inner part of the shell (1) is provided with a plurality of supporting parts (7) for supporting the inner wall of the shell (1).
9. The flow guide structure for air intake of heavy duty gas turbine according to claim 1, wherein: the bottom of the shell (1) is provided with a drain hole (8).
10. The flow guide structure for air intake of a heavy duty gas turbine according to any one of claims 1 to 9, wherein: the shell (1) is provided with an openable maintenance window (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063823.XA CN115263557A (en) | 2022-08-31 | 2022-08-31 | Heavy gas turbine admits air and uses water conservancy diversion structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063823.XA CN115263557A (en) | 2022-08-31 | 2022-08-31 | Heavy gas turbine admits air and uses water conservancy diversion structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115263557A true CN115263557A (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211063823.XA Pending CN115263557A (en) | 2022-08-31 | 2022-08-31 | Heavy gas turbine admits air and uses water conservancy diversion structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115263557A (en) |
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2022
- 2022-08-31 CN CN202211063823.XA patent/CN115263557A/en active Pending
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