CN113417888A - Miniature guide vane type processor casing structure of gas compressor of ship gas turbine - Google Patents
Miniature guide vane type processor casing structure of gas compressor of ship gas turbine Download PDFInfo
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- CN113417888A CN113417888A CN202110842594.0A CN202110842594A CN113417888A CN 113417888 A CN113417888 A CN 113417888A CN 202110842594 A CN202110842594 A CN 202110842594A CN 113417888 A CN113417888 A CN 113417888A
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- Prior art keywords
- guide vane
- miniature
- micro
- gas turbine
- micro guide
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- 238000000034 method Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010992 reflux Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a micro guide vane type processor casing structure of a ship gas turbine compressor. The micro guide vane assembly comprises a micro guide vane, a small ring, a large ring and a connecting pin; the miniature guide vane is connected with the large ring and the small ring through a connecting pin. The external diameter of the secondary reflux cavity, the external diameter of the micro guide vane, the number of the micro guide vanes and the vane profile of the micro guide vane are four important structural parameters of the device, and the specific selection of the four structural parameters is determined by a design method of the reflux cavity and the spoiler type processing case of the gas compressor of the ship gas turbine. Finally, the miniature guide vane type processing case adopts a half-split structure, and aims to realize the purpose of quickly replacing processing cases with different structural forms on a gas compressor test bed.
Description
Technical Field
The invention relates to a miniature guide vane type processor casing structure of a gas compressor of a ship gas turbine, belonging to the gas turbine design and processing industry.
Background
The compressor is one of the most important three core components of the ship gas turbine, and the technical performance and reliability of the compressor directly influence the realization of the safety, technical index and economic index of the ship gas turbine. In order to meet the requirements of a ship in the sailing process, the gas turbine of the ship is required to be forced to operate with wide margin and high efficiency under a low working condition while the performance of a design point is ensured. The operation characteristic under the large-range variable working condition enables the problem of low working condition stability of the gas turbine to be prominent when the gas turbine is used as a ship power system for propulsion or power generation, and the problem often becomes a limiting bottleneck of unit performance, so that higher requirements are provided for the performance and the stability of a ship gas turbine compressor under the non-designed working condition. Therefore, in order to make the ship gas turbine have a wider stable working range and more excellent variable working condition performance, various surge prevention and stability expansion technologies are often needed to be adopted, so that the surge margin index of the compressor under a low working condition is improved, and the efficiency index of the compressor at a design point is met.
Among various compressor surge-proof and stability-expanding technologies, a casing processing technology is a common technical means for improving the surge margin of the compressor under the non-designed working condition. In the traditional compressor casing processing technology, various structures such as slots or grooves are formed in the compressor casing, and a special flow relation is established between the blade top clearance of the compressor and the casing, so that the stall state of the compressor is changed, the surge margin of the compressor is increased, and the original shaped flow state is inevitably damaged, and the efficiency of the compressor is reduced. Therefore, how to design a processing casing structure which can increase the surge margin of the compressor and has basically no reduction of the efficiency becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the problem that the stability of a low working condition is improved while the performance of a design point of a gas compressor of a ship gas turbine is ensured, and further provides a miniature guide vane type processing casing structure of the gas compressor of the ship gas turbine.
The purpose of the invention is realized as follows: the micro guide vane assembly is connected and fastened with the casing of the treatment casing through the screw and the locking gasket; the miniature guide vane assembly comprises a miniature guide vane, a small ring, a large ring and a connecting pin, and the miniature guide vane is connected with the large ring and the small ring through the connecting pin.
The invention also includes such structural features:
1. the micro guide vane is determined by the outer diameter of a backflow cavity, the outer diameter of the micro guide vane, the number of the micro guide vanes and the vane profile of the micro guide vane, and the three parameters of the outer diameter of the backflow cavity, the outer diameter of the micro guide vane and the number of the micro guide vane influence the overall stability expanding effect by changing the backflow amount of the treatment casing; the blade profile of the miniature guide vane influences the loss of gas in a main runner when the gas enters the backflow cavity, and the miniature guide vane is determined by the backflow cavity-spoiler type treatment case design method of the ship gas turbine compressor through the outer diameter of the backflow cavity, the outer diameter of the miniature guide vane, the number of the miniature guide vane and the selection of the blade profile of the miniature guide vane.
Compared with the prior art, the invention has the beneficial effects that: the invention effectively solves the problems and provides a miniature guide vane type processing casing structure of the gas compressor of the ship gas turbine, which increases the surge margin and reduces the efficiency as little as possible, thereby meeting the design index.
The invention utilizes the pressure difference to lead part of low-speed fluid at the top of the movable vane in the main runner to be guided to the backflow cavity through the miniature guide vane, thereby reducing the low-speed area at the top of the movable vane, improving the flow in the vane channel and further achieving the effect of stability expansion; the gas enters the backflow cavity after being guided by the miniature guide vanes and then enters the main runner again, so that backflow is formed, dead cavities are avoided, and the efficiency loss of the gas compressor is reduced to the maximum extent while the surge margin of the gas compressor is improved.
Drawings
FIG. 1 is a schematic structural diagram of a miniature guide vane type processing casing of a gas compressor of a marine gas turbine.
Fig. 2 is a top view of a micro guide vane of the present invention.
FIG. 3 is a schematic diagram of the important structural parameters of the miniature guide vane type processing casing of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, a micro guide vane type processing casing structure of a gas compressor of a ship gas turbine comprises a processing casing shell 1, a micro guide vane assembly 2, a screw 3 and a locking gasket 4. The micro guide vane assembly 2 and the treatment casing shell 1 are connected and fastened through a screw 3 and a locking gasket 4 to form a main body structure of the micro guide vane type treatment casing.
Referring to fig. 2, the micro guide vane assembly includes a micro guide vane 11, a small ring 12, a large ring 13, and connection pins 14, 15. The micro guide vanes 11 are connected to the large and small rings by connecting pins 14 and 15. The miniature guide vane parts are combined and processed according to the whole circumference; the inner sides of the big ring and the small ring are provided with a channel matched with the miniature guide vane, so that the stability of the structure is ensured.
Referring to fig. 3, the outer diameter of the backflow cavity, the outer diameter of the micro guide vanes, the number of the micro guide vanes and the vane profile of the micro guide vanes are four important structural parameters of the invention. The three parameters of the external diameter of the reflux cavity, the external diameter of the micro guide vane and the number of the micro guide vanes influence the whole stability expanding effect by changing the reflux quantity of the treatment casing. The miniature guide vane blade profile influences the loss of the gas of the main runner when entering the backflow cavity, and the miniature guide vane blade profile with reasonable design can effectively reduce the reduction of peak efficiency. The concrete selection of the four structural parameters is determined by a design method of a ship gas turbine compressor backflow cavity-spoiler type processing casing.
In order to realize quick replacement on the gas compressor test bed, the miniature guide vane type processing case adopts an upper and lower halving structure, namely the purpose is to realize quick replacement of processing cases with different structural forms on the gas compressor test bed.
Technical contents not described in detail in the present invention belong to the well-known techniques of those skilled in the art.
The micro guide vane type processor casing structure of the ship gas turbine compressor is not limited to the ship gas turbine axial flow compressor, but is also suitable for various industrial gas turbine axial flow compressors and aircraft engine axial flow compressors with processor casings.
In conclusion, the invention provides a miniature guide vane type processing casing structure of a gas compressor of a ship gas turbine, and aims to solve the problem of low working condition stability when the gas compressor of the ship gas turbine is used. Firstly, the micro guide vane assembly is connected with the casing of the treatment casing through a screw and a locking gasket to form a main body structure of the micro guide vane type treatment casing. The micro guide vane assembly comprises a micro guide vane, a small ring, a large ring and a connecting pin; the miniature guide vane is connected with the large ring and the small ring through a connecting pin. The external diameter of the secondary reflux cavity, the external diameter of the micro guide vane, the number of the micro guide vanes and the vane profile of the micro guide vane are four important structural parameters of the invention, and the specific selection of the four structural parameters is determined by a design method of the reflux cavity and the spoiler type processing case of the gas compressor of the ship gas turbine. Finally, the miniature guide vane type processing case adopts a half-split structure, and aims to realize the purpose of quickly replacing processing cases with different structural forms on a gas compressor test bed. Meanwhile, the structure is not limited to the axial flow compressor of the ship gas turbine, but also suitable for various industrial gas turbine axial flow compressors and aircraft engine axial flow compressors with treatment casings.
Claims (2)
1. The utility model provides a miniature water conservancy diversion blade type of boats and ships gas turbine compressor handles quick-witted casket structure which characterized in that: the micro guide vane assembly is connected and fastened with the casing of the treatment casing through the screw and the locking gasket; the miniature guide vane assembly comprises a miniature guide vane, a small ring, a large ring and a connecting pin, and the miniature guide vane is connected with the large ring and the small ring through the connecting pin.
2. The micro guide vane type processing casing structure of the ship gas turbine compressor as claimed in claim 1, wherein: the micro guide vane is determined by the outer diameter of a backflow cavity, the outer diameter of the micro guide vane, the number of the micro guide vanes and the vane profile of the micro guide vane, and the three parameters of the outer diameter of the backflow cavity, the outer diameter of the micro guide vane and the number of the micro guide vane influence the overall stability expanding effect by changing the backflow amount of the treatment casing; the blade profile of the miniature guide vane influences the loss of gas in a main runner when the gas enters the backflow cavity, and the miniature guide vane is determined by the backflow cavity-spoiler type treatment case design method of the ship gas turbine compressor through the outer diameter of the backflow cavity, the outer diameter of the miniature guide vane, the number of the miniature guide vane and the selection of the blade profile of the miniature guide vane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110842594.0A CN113417888A (en) | 2021-07-26 | 2021-07-26 | Miniature guide vane type processor casing structure of gas compressor of ship gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110842594.0A CN113417888A (en) | 2021-07-26 | 2021-07-26 | Miniature guide vane type processor casing structure of gas compressor of ship gas turbine |
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| Publication Number | Publication Date |
|---|---|
| CN113417888A true CN113417888A (en) | 2021-09-21 |
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|---|---|---|---|
| CN202110842594.0A Pending CN113417888A (en) | 2021-07-26 | 2021-07-26 | Miniature guide vane type processor casing structure of gas compressor of ship gas turbine |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205806018U (en) * | 2016-06-22 | 2016-12-14 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of cartridge receiver connection structure |
| CN112065777A (en) * | 2020-11-10 | 2020-12-11 | 中国航发上海商用航空发动机制造有限责任公司 | Adjusting precision maintaining structure of inlet guide vane of gas compressor |
| CN112685929A (en) * | 2020-12-22 | 2021-04-20 | 中国船舶重工集团公司第七0三研究所 | Design method of ship gas turbine compressor backflow cavity-spoiler type treatment casing |
-
2021
- 2021-07-26 CN CN202110842594.0A patent/CN113417888A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205806018U (en) * | 2016-06-22 | 2016-12-14 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of cartridge receiver connection structure |
| CN112065777A (en) * | 2020-11-10 | 2020-12-11 | 中国航发上海商用航空发动机制造有限责任公司 | Adjusting precision maintaining structure of inlet guide vane of gas compressor |
| CN112685929A (en) * | 2020-12-22 | 2021-04-20 | 中国船舶重工集团公司第七0三研究所 | Design method of ship gas turbine compressor backflow cavity-spoiler type treatment casing |
Non-Patent Citations (2)
| Title |
|---|
| 王钟铭: "《舰船燃气轮机装置》", 31 August 1981 * |
| 马宏: "《汽轮机设备及运行》", 31 May 2013 * |
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Application publication date: 20210921 |