EP2344770A1 - Blow-off system for multi-stage turbo compressor - Google Patents
Blow-off system for multi-stage turbo compressorInfo
- Publication number
- EP2344770A1 EP2344770A1 EP08812484A EP08812484A EP2344770A1 EP 2344770 A1 EP2344770 A1 EP 2344770A1 EP 08812484 A EP08812484 A EP 08812484A EP 08812484 A EP08812484 A EP 08812484A EP 2344770 A1 EP2344770 A1 EP 2344770A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blow
- turbo compressor
- surge
- disposed
- valves
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007664 blowing Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0223—Control schemes therefor
Definitions
- the present invention relates to a blow-off system for a multi-stage turbo compressor that is mounted to perform rapid transformation to load and no load and to reduce the load of a bearing upon the transformation, the blow-off system including: a plurality of blow-off pipes disposed according to respective stages of the multi-stage turbo compressor; a plurality of blow-off valves disposed correspondingly to the plurality of blow-off pipes; and a plurality of nozzles disposed at the front or back sides of the plurality of blow-off valves, thereby preventing the generation of surge.
- a multi-stage turbo compressor has a minimum flow rate value at a specific pressure because surge is generated.
- a blow-off valve 3 is disposed on a branch pipe, and the opening and closing speed of the blow-off valve 3 is appropriately set, thereby applying no impact to the compressor and preventing the occurrence of the surge.
- a relatively large valve is capable of blowing off at a sufficiently high flow rate so as to avoid one-stage surge at a low pressure like a low speed surge area as shown in FIG.3, thereby being lowering to an area where the pressure is low and the flow rate is high.
- the blow-off valve is closed to change to load, the pressure is momentarily increased to apply much load to a bearing, and especially, if an impeller is disposed at the both sides of a shaft, thrust load is drastically increased at a position of a convection quantity at a low pressure.
- a blow-off valve and an adjusting plate are disposed on an outlet pipe, but they are not adapted to prevent surge, but adapted to control an amount of air discharged by mounting a nozzle in the middle portion thereof, thereby functioning as a cooling air extracting system for cooling a motor or a magnetic bearing.
- a flow rate-controlling nozzle is disposed at the front or rear side of a blow-off valve, thereby rapidly responding to the generation of the surge.
- the prior art blow-off system is applicable to a single-stage compressor, and it has the limited operating range by the one-stage surge in a multi-stage compressor. Therefore, so as to avoid the limitation of the operating range, the nozzle should be disposed at each of the multiple stages of the multi-stage compressor, thereby rapidly responding to the generation of the surge. Disclosure of Invention Technical Problem
- the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a blow-off system for a multi-stage turbo compressor that is mounted to perform rapid transformation to load and no load and to reduce the load of a bearing upon the transformation, the blow-off system including: a plurality of blow-off pipes disposed according to respective stages of the multi-stage turbo compressor; a plurality of blow-off valves disposed correspondingly to the plurality of blow-off pipes; and a plurality of nozzles disposed at the front or back sides of the plurality of blow-off valves, thereby preventing the generation of surge.
- a blow-off system for a multi-stage turbo compressor that includes a plurality of blow- off pipes disposed according to respective stages of the multi-stage turbo compressor; a plurality of blow-off valves disposed correspondingly to the plurality of blow-off pipes; and a plurality of nozzles disposed at the front or back sides of the plurality of blow-off valves.
- a first blow-off valve and a first nozzle are adapted to stop the blowing near a maximum available pressure, thereby reducing the impact
- a second blow-off valve and a second nozzle are adapted to conduct the blowing while avoiding the surge of a first stage of the compressor at a low speed area, thereby rapidly lowering a revolution to no load.
- FIG.1 is a schematic view showing a conventional blow-off system.
- FIG.2 is a schematic view showing a blow-off system for a multi-stage turbo compressor according to the present invention.
- FIG.3 is a graph showing the performance curves of the blow-off system for a multistage turbo compressor according to the present invention. Mode for the Invention
- the blow-off system has an on/off type first blow-off valve 4 and a first nozzle 14 at the front or rear side of the first blow-off valve 4 and an on/off type second blow-off valve 5 and a second nozzle 15 disposed at the front or rear side of the second blow-off valve 5, so as to control the flow rate passed therethrough by two stages.
- a first problem where the surge on a first stage of the compressor at a low revolution is generated is solved by opening all of the first and second blow-off valves 4 and 5 and the first and second nozzles 14 and 15, thereby enlarging a sufficient blowing area
- a second problem where the impact is generated during loading is solved by closing the second blow-off valve 5 and the second nozzle 15 and next by closing the first blow- off valve 4 and the first nozzle 14 after acceleration, thereby distributing the impact
- a third problem where the surge is generated during unloading is solved by opening all of the first and second blow-off valves 4 and 5 and the first and second nozzles 14 and 15 at a time and at the same time by conducting the deceleration, thereby enlarging a sufficient blowing area and simultaneously rapidly achieving the deceleration, without any exceeding to a thrust protection line.
- the two-stage compressor which has the first and second blow-off valves 4 and 5 and the first and second nozzles 14 and 15, is employed as the multi-stage compressor, but it is possible that the number of the valves and nozzles is freely adjusted according to the number of stages of the compressor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2008/006022 WO2010044493A1 (en) | 2008-10-13 | 2008-10-13 | Blow-off system for multi-stage turbo compressor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2344770A1 true EP2344770A1 (en) | 2011-07-20 |
EP2344770A4 EP2344770A4 (en) | 2017-11-01 |
EP2344770B1 EP2344770B1 (en) | 2019-12-11 |
Family
ID=42106651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08812484.7A Active EP2344770B1 (en) | 2008-10-13 | 2008-10-13 | Blow-off system for multi-stage turbo compressor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110194928A1 (en) |
EP (1) | EP2344770B1 (en) |
JP (1) | JP2012505344A (en) |
CN (1) | CN102177347A (en) |
WO (1) | WO2010044493A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105626266B (en) * | 2016-01-12 | 2017-09-08 | 中国科学院工程热物理研究所 | A kind of gas turbine anti-surge deflation energy recovery utilizing system |
CN113728163B (en) * | 2019-04-15 | 2023-09-15 | 株式会社日立产机*** | gas compressor |
US11768014B2 (en) | 2019-07-01 | 2023-09-26 | Carrier Corporation | Surge protection for a multistage compressor |
CN111322265B (en) * | 2020-04-27 | 2022-02-11 | 乔治洛德方法研究和开发液化空气有限公司 | Anti-surge system of centrifugal compressor and control method |
CN111927819B (en) * | 2020-10-15 | 2021-01-01 | 中国航发上海商用航空发动机制造有限责任公司 | Combined anti-surge method and multistage axial flow compressor experiment platform |
CN112412864B (en) * | 2020-12-11 | 2022-07-19 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor experiment platform and surging and deep stall exit method thereof |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH237682A (en) | 1943-06-26 | 1945-05-15 | Escher Wyss Maschf Ag | Procedure for avoiding pumping of multistage centrifugal compressors. |
US2520697A (en) * | 1943-10-11 | 1950-08-29 | Vickers Electrical Co Ltd | Internal-combustion turbine plant |
US4046490A (en) * | 1975-12-01 | 1977-09-06 | Compressor Controls Corporation | Method and apparatus for antisurge protection of a dynamic compressor |
US4834622A (en) * | 1983-06-15 | 1989-05-30 | Sundstrand Corporation | Gas turbine engine/load compressor power plants |
JPS61182491A (en) * | 1985-02-06 | 1986-08-15 | Hitachi Ltd | Automatic operation controller of turbocompressor |
US5137681A (en) * | 1990-05-23 | 1992-08-11 | Michael Dougherty | Method and apparatus for recycling turbine exhaust steam in electrical power generation |
JPH08121398A (en) | 1994-10-26 | 1996-05-14 | Ishikawajima Harima Heavy Ind Co Ltd | Blow-off device for turbocompressor |
JP3425308B2 (en) | 1996-09-17 | 2003-07-14 | 株式会社 日立インダストリイズ | Multistage compressor |
JP3890778B2 (en) * | 1998-04-06 | 2007-03-07 | 株式会社日立プラントテクノロジー | Turbo compressor system |
JP4220631B2 (en) * | 1999-09-22 | 2009-02-04 | 三菱重工業株式会社 | Surging detection method and apparatus for gas turbine compressor |
JP3921359B2 (en) * | 2001-05-30 | 2007-05-30 | 株式会社神戸製鋼所 | Oil-cooled screw compressor |
JP4069675B2 (en) * | 2002-05-22 | 2008-04-02 | 株式会社日立プラントテクノロジー | Turbo compressor and capacity control method thereof |
DE102004036238A1 (en) * | 2004-07-26 | 2006-02-16 | Alstom Technology Ltd | Method for modifying a turbocompressor |
WO2008060073A1 (en) | 2006-11-17 | 2008-05-22 | Kturbo, Inc. | Blow off system for turbo compressor |
-
2008
- 2008-10-13 WO PCT/KR2008/006022 patent/WO2010044493A1/en active Application Filing
- 2008-10-13 EP EP08812484.7A patent/EP2344770B1/en active Active
- 2008-10-13 JP JP2011530921A patent/JP2012505344A/en active Pending
- 2008-10-13 US US13/123,079 patent/US20110194928A1/en not_active Abandoned
- 2008-10-13 CN CN2008801314969A patent/CN102177347A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2010044493A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102177347A (en) | 2011-09-07 |
EP2344770A4 (en) | 2017-11-01 |
JP2012505344A (en) | 2012-03-01 |
WO2010044493A1 (en) | 2010-04-22 |
EP2344770B1 (en) | 2019-12-11 |
US20110194928A1 (en) | 2011-08-11 |
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