EP2344770B1 - Blow-off system for multi-stage turbo compressor - Google Patents
Blow-off system for multi-stage turbo compressor Download PDFInfo
- Publication number
- EP2344770B1 EP2344770B1 EP08812484.7A EP08812484A EP2344770B1 EP 2344770 B1 EP2344770 B1 EP 2344770B1 EP 08812484 A EP08812484 A EP 08812484A EP 2344770 B1 EP2344770 B1 EP 2344770B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blow
- turbo compressor
- compressor
- surge
- stage
- 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.)
- Active
Links
- 239000011888 foil Substances 0.000 claims description 2
- 238000007664 blowing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 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
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
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
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)
Description
- 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.
- Unlike a reciprocating compressor or a screw compressor, a multi-stage turbo compressor has a minimum flow rate value at a specific pressure because surge is generated.
- During the operation of the compressor, if the flow rate is decreased and the surge is sensed, air blows off toward atmosphere or an inlet, thereby escaping from the surge, such that a revolution is reduced to stand by at a no load state.
- Conventionally, as shown in
FIG.1 , a blow-offvalve 3 is disposed on a branch pipe, and the opening and closing speed of the blow-offvalve 3 is appropriately set, thereby applying no impact to the compressor and preventing the occurrence of the surge. - According to the conventional system as shown in
FIG.1 , 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 inFIG.3 , thereby being lowering to an area where the pressure is low and the flow rate is high. However, when 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. - If a relatively small valve is employed to decrease the blow-off quantity, the impact applied during the valve is opened and closed is small, but while the revolution is being increased, a low speed surge area is suffered at a low revolution. Thus, so as to avoid the surge, the revolution should be reduced up to no load at the expense of a substantially long period of time.
- More specifically, if a bearing having a relatively large supporting force like an air foil bearing is employed, a momentary pressure variation causes the bearing to be burnt or damaged, such that a substantially large thrust bearing supporting force is needed.
- According to the prior art disclosed in Japanese Patent Publication No.
10-089296 (dated on April 7, 1998 US 5,980,218 ), 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. - According to another prior art disclosed in International Patent Application No.
PCT/ KR2007/005663 (filed on November 12, 2007 WO 2008/060073 A1 ), further, 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. However, 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. -
US 2,520,697 discloses an internal-combustion turbine plant with means for blowing off air. Shown are nozzles and corresponding passages along compressor stages. More specifically, it shows a blow-off system for a multi-stage turbo compressor comprising a plurality of blow-off pipes disposed according to respective stages of the multi-stage turbo compressor, and a plurality of nozzles disposed correspondingly to the plurality of blow-off pipes so as to prevent the generation of surge. -
CH 237682 -
JP 08121398 - Accordingly, 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.
- To achieve the above object, according to the present invention, there is provided 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; and wherein the biow-off pipes are connected to an outlet pipe of the multi-stage turbo compressor.
- According to the present invention, a first blow-off valve and a first nozzle are adapted to stop the blowing near a maximum available pressure, thereby reducing the impact, and 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 multi-stage turbo compressor according to the present invention. - Hereinafter, an explanation on a blow-off system for a multi-stage turbo compressor according to the present invention will be given with reference to the attached drawings.
- As shown in
FIG.2 , there is provided the blow-off system has an on/off type first blow-offvalve 4 and a first nozzle 14 at the front or rear side of the first blow-offvalve 4 and an on/off type second blow-offvalve 5 and a second nozzle 15 disposed at the front or rear side of the second blow-offvalve 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 valve 5 and the second nozzle 15 and next by closing the first blow-offvalve 4 and the first nozzle 14 after acceleration, thereby distributing the impact, and a third problem where the surge is generated during unloading is solved by opening all of the first and second blow-offvalves - An activating algorism of the compressor is in detail illustrated by the performance curves as shown in
FIG.3 , and the processes are as follows: -
- (1) If power is applied, all of the first and second blow-off
valves - (2) If an activating signal is applied, the revolution is accelerated to P1 and stand-by is conducted to a no load state.
- (3) If a loading signal is applied, the revolution is accelerated to P2.
- (4) The second blow-off
valve 5 and the second nozzle 15 are closed and the revolution is accelerated to P3. - (5) The revolution is accelerated to P4.
- (6) The first blow-off
valve 4 and the first nozzle 14 are closed to stop the blowing and to provide compressed gas. -
- (1) The revolution is conducted at P6 and if an unloading signal is applied, all of the first and second blow-off
valves - (2) The revolution is rapidly decreased to P2.
- In the above-mentioned description, the two-stage compressor, which has the first and second blow-off
valves
Claims (3)
- A blow-off system for a multi-stage turbo compressor (1) comprising:a plurality of blow-off pipes disposed according to respective stages of the multistage turbo compressor (1);a plurality of blow-off valves (4 and 5) disposed correspondingly to the plurality of blow-off pipes; anda plurality of nozzles (14 and 15) disposed at the front or back sides of the plurality of blow-off valves (4 and 5) so as to prevent the generation of surge;and wherein the blow-off pipes are connected to an outlet pipe of the multi-stage turbo compressor (1).
- A blow-off-system according to claim 1, wherein the turbocompressor (1) is driven by a motor (2) and has an air foil bearing.
- A multi-stage turbo compressor with a blow-off system according to one of the preceding 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 EP2344770A1 (en) | 2011-07-20 |
EP2344770A4 EP2344770A4 (en) | 2017-11-01 |
EP2344770B1 true 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 |
JP7267407B2 (en) * | 2019-04-15 | 2023-05-01 | 株式会社日立産機システム | gas compressor |
EP3997343B1 (en) | 2019-07-01 | 2023-08-09 | 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 EP EP08812484.7A patent/EP2344770B1/en active Active
- 2008-10-13 JP JP2011530921A patent/JP2012505344A/en active Pending
- 2008-10-13 WO PCT/KR2008/006022 patent/WO2010044493A1/en active Application Filing
- 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 |
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None * |
Also Published As
Publication number | Publication date |
---|---|
US20110194928A1 (en) | 2011-08-11 |
CN102177347A (en) | 2011-09-07 |
EP2344770A4 (en) | 2017-11-01 |
WO2010044493A1 (en) | 2010-04-22 |
JP2012505344A (en) | 2012-03-01 |
EP2344770A1 (en) | 2011-07-20 |
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