WO2011099416A1 - 非対称自己循環ケーシングトリートメントを有する遠心圧縮機 - Google Patents
非対称自己循環ケーシングトリートメントを有する遠心圧縮機 Download PDFInfo
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- WO2011099416A1 WO2011099416A1 PCT/JP2011/052269 JP2011052269W WO2011099416A1 WO 2011099416 A1 WO2011099416 A1 WO 2011099416A1 JP 2011052269 W JP2011052269 W JP 2011052269W WO 2011099416 A1 WO2011099416 A1 WO 2011099416A1
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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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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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
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/685—Inducing localised fluid recirculation in the stator-rotor interface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/73—Shape asymmetric
Definitions
- the present invention relates to a centrifugal compressor having an asymmetric self-circulating casing treatment.
- Centrifugal compressors are used in various types of turbomachines such as superchargers for vehicles and ships, industrial compressors, and aero engines.
- a turbo compressor using a centrifugal compressor has advantages such as high efficiency, light weight, and stable operation over a reciprocating compressor, but its allowable operating range (ie, centrifugal compression).
- the flow range of the machine is limited.
- an unstable phenomenon such as a large fluid separation occurs in the internal flow field, resulting in stalling and thus surge.
- the efficiency and pressure ratio of the compressor are rapidly reduced, the life is shortened, and as a result, the compressor is damaged in a short time. Therefore, by adopting various measures, instability phenomena such as the stall of the compressor are suppressed, and the stable operation range is expanded.
- a casing treatment for a centrifugal compressor is used to expand the stable operating range.
- Casing treatments are disclosed in Patent Documents 1 to 5, for example.
- Patent No. 3001902 JP 2007-127109 A Japanese Patent No. 4100030 Japanese Patent No. 4107823 US Pat. No. 4,930,979
- casing treatment is currently considered to be an effective means for expanding the stable operating range of a centrifugal compressor.
- the conventional casing treatment is configured to be axisymmetric with respect to the rotation axis of the impeller.
- a casing treatment that is axisymmetric with respect to the rotation axis is referred to as “axisymmetric casing treatment”
- a casing treatment that is asymmetric with respect to the rotation axis is referred to as “asymmetric casing treatment”.
- the scroll flow path of the casing is asymmetrically configured with respect to the rotation axis of the impeller. Circumferential distortion occurs in the flow of the compressor, affecting the upstream flow parameter, and the circumferential flow parameter inside the compressor impeller and vaneless diffuser exhibits asymmetry.
- the configuration of the conventional axisymmetric casing treatment does not take into account the characteristics of the asymmetry of the flow field inside the compressor, so the effect of expanding the stable operation range by the casing treatment cannot be achieved in the entire circumferential direction. Therefore, it is necessary to employ an asymmetric self-circulating casing treatment in order to realize the effect of expanding the optimum stable operation range in the entire circumferential direction.
- FIG. 1A is a half sectional view of a centrifugal compressor having a self-circulating casing treatment
- FIG. 1B is an explanatory view of the self-circulating casing treatment.
- the impeller 13 has an impeller full blade 11 and an impeller half blade 12.
- ZZ is the center of rotation of the impeller 13.
- the self-circulating casing treatment generally includes a suction ring groove 1, a ring guide path 2, and a return ring groove 3.
- the main configuration parameters of the self-circulation casing treatment is the axial distance S r relative to the suction ring groove 1 of the impeller all the blade leading edge 4, the width b r of the suction ring groove, reflux ring groove 3 of the impeller all the blade leading edge 4 Are the axial distance S f , the width b f of the return ring groove 3, the depth h b of the return ring groove 3, the width b b of the ring guide path 2, and the like.
- an object of the present invention is to optimize the circumferential distribution of the axial distance S r or the width b r of the suction ring groove with respect to the leading edge of the impeller blades, thereby reducing the stable operating range while maintaining efficiency. It is to provide a centrifugal compressor having an asymmetric self-circulating casing treatment that can be expanded to the side.
- the present invention includes a suction ring groove (1), a ring guide path (2), and a return ring groove (3) on the inner peripheral surface of a casing, and a centrifugal having an asymmetric self-circulation casing treatment that forms a self-circulation flow path.
- the position or width of the suction ring groove is distributed in an arc shape in the circumferential direction, and the center angle ⁇ of the arc is in a range of 0 ⁇ ⁇ 30 °.
- the width is the width b r of the suction ring groove, and the ratio of the radius R of the arc and the impeller diameter D is in a range of 2 ⁇
- the casing comprises an outer shell (5) and a core (6),
- the suction ring groove (1) is provided on the wall surface of the core (6), and the inner wall surface of the outer shell and the outer wall surface of the core form the ring guide path (2) and the return ring groove (3). .
- the present invention adopts an asymmetric self-circulating casing treatment in which the position or width of the suction ring groove is distributed in an arc shape, so that the stable operating range of the centrifugal compressor is more than that of an axially symmetric self-circulating casing treatment. It has been confirmed in the examples described later that the efficiency can be maintained so that the efficiency is basically unchanged.
- FIG. 3 is a half cross-sectional view of a centrifugal compressor having a self-circulating casing treatment. It is explanatory drawing of a self-circulation casing treatment. It is a front schematic diagram of the outer shell of a casing. It is a half cross-sectional schematic diagram of the outer shell of a casing. It is a schematic diagram of the casing of a compressor. It is a structure schematic diagram of the core of a casing. It is a schematic diagram of the suction ring groove in the core. It is a position schematic diagram of initial phase angle theta 0 in an example. It is a distribution schematic axial distance S r of the suction ring groove corresponding to different initial phase angle theta 0.
- FIG. 6 is a schematic diagram of distribution of axial distances Sr in Embodiment 1.
- FIG. It is a related figure of the normalized mass flow rate in Example 1, and a pressure ratio.
- FIG. 4 is a relationship diagram between normalized mass flow rate and efficiency in Example 1.
- It is a schematic diagram of the casing of a compressor. It is a structure schematic diagram of the core of a casing. It is a schematic diagram of the suction ring groove in the core. It is a distribution schematic diagram of the width b r of the suction ring groove corresponding to different initial phase angles ⁇ 0 .
- It is a related figure of the normalized mass flow rate in Example 2, and a pressure ratio. It is a related figure of the normalized mass flow rate in Example 2, and efficiency.
- FIG. 2A, 2B, and 3 to 5 are schematic views showing the first embodiment of the present invention.
- FIG. 2A is a schematic front view of the outer shell 5 of the casing
- FIG. 2B is a schematic cross-sectional view
- FIG. 4 is a schematic diagram of the casing
- FIG. 4 is a schematic diagram of the configuration of the core 6 of the casing
- FIG. 5 is a schematic diagram of the suction ring groove in the core.
- the centrifugal compressor according to the present invention has a suction ring groove 1, a ring guide path 2, and a return ring groove 3 on the inner peripheral surface of the casing to form a self-circulation flow path.
- the self-circulation flow path is a return path for returning fluid from a position downstream of the impeller blade front edge to an upstream position of the impeller blade front edge by the suction ring groove 1, the ring guide path 2, and the return ring groove 3. means.
- the casing 10 of the centrifugal compressor of the first embodiment includes an outer shell 5 and a core 6, and the suction ring groove 1 is provided on the wall surface of the core 6.
- the inner wall surface and the outer wall surface of the core 6 form the ring guide path 2 and the reflux ring groove 3.
- the central angle of the arc of the axial distance S r alpha (not shown), 0 ⁇ a range of alpha ⁇ 30 °, arc radius R and the impeller diameter
- the ratio with D is in the range of 2 ⁇
- the position of the suction ring groove 1 according to the arcuate distribution by design is a curve on the circumferential cylindrical surface of the core 6 and is indicated by a dashed line in FIG.
- the outer shell 5 of the casing is fixed, and the core 6 is rotated around the rotation axis center ZZ of the impeller 13 (see FIG. 1).
- an arcuate distribution of the position (axial distance S r ) of the suction ring groove 1 corresponding to a different initial phase angle ⁇ 0 can be obtained. That is, the outer shell 5 and the core 6 of the casing 10 are connected by the screw 7.
- n (four in this example) screw holes are evenly arranged in the circumferential direction, and the axial distance S r corresponding to n different initial phase angles ⁇ 0 is set. A distribution curve is obtained.
- the optimum initial phase angle ⁇ 0 is determined from n different initial phase angles ⁇ 0 by compressor performance tests.
- FIG. 6 is a schematic diagram of the position of the initial phase angle ⁇ 0 in the embodiment
- FIG. 7 is a schematic diagram of the distribution of Sr values of the suction ring grooves corresponding to different initial phase angles ⁇ 0 . 2A and 2B, since a total of four screw holes are provided in the outer shell 5 of the casing 10, the arc-shaped distribution of the axial distance Sr of the four different suction ring grooves 1 shown in FIG. can get.
- FIG. 7 is a distribution schematic diagram of the axial distance S r of the suction ring groove 1 corresponding to different initial phase angles ⁇ 0 .
- the solid line is an arc-shaped distribution in the circumferential direction of the axial distance S r of the suction ring groove 1, based on varying the selection of the circumferential direction of the initial phase angle theta 0, there are a variety of representations.
- ⁇ 0 is the initial phase angle
- the casing 10 is a circle of one circumference of 0 ° ⁇ ⁇ 0 ⁇ 360 °
- ⁇ 0 to ⁇ 0 + 360 ° are the entire circumference angle of the casing 10 in the figure.
- the air in the flow path of the self-circulating casing treatment flows in from the suction ring groove 1 and flows out through the ring guide path 2 and the reflux ring groove 3 in the low flow rate mode.
- the specific operating principle is that the suction ring groove 1 of the self-circulating casing treatment sucks the gas in the impeller blade tip region and releases the gas from the return ring groove 3 through the ring guide path 2.
- the air in the flow path of the self-circulating casing treatment is discharged from the suction ring groove 1 through the reflux ring groove 3 and the ring guide path 2.
- the reflux ring groove 3 communicates the flow in the circumferential direction of the inlet, thereby increasing the uniformity of the flow at the compressor inlet, weakening the shock wave at the inlet, and the discharge flow of the suction ring groove 1 enhances the circulation capacity. By doing so, the occlusion boundary was expanded. However, due to the lack of suction power in the mode of operation close to blockage, the expansion of the casing treatment to the blockage boundary is less noticeable than the expansion to the stall boundary.
- FIG. 8 is a schematic diagram of the distribution of Sr values in the example.
- the distribution of the Sr value of the asymmetric casing treatment of the centrifugal compressor is shown as in FIG.
- FIG. 9A is a graph showing the relationship between the normalized mass flow rate and the pressure ratio in Example 1.
- FIG. 9B is a relationship diagram between normalized mass flow rate and efficiency in Example 1.
- 9A and 9B show an asymmetric self-circulating casing treatment ("asymmetric self-circulating CT"), an axisymmetric self-circulating casing treatment (“axi-symmetric self-circulating CT”), and a casing treatment. It is a performance comparison figure of the compressor when there is no (“No CT”).
- asymmetric self-circulation casing treatment asymmetric self-circulation CT
- the groove position of the present invention is an arc distribution
- axisymmetric self-circulating casing treatment axisymmetric self-circulating CT
- FIG. 10 to 12 are schematic views showing a second embodiment of the present invention.
- FIG. 10 is a schematic view of the casing 10 of the compressor.
- FIG. 11 is a schematic view of the configuration of the core 6 of the casing 10.
- FIG. 3 is a schematic diagram of the suction ring groove 1 in the core 6. 2A and 2B are common to the first embodiment.
- the centrifugal compressor of the present invention has a suction ring groove 1, a ring guide path 2, and a return ring groove 3 on the inner peripheral surface of the casing, and forms an asymmetric circulation path.
- the casing 10 of the centrifugal compressor of the second embodiment includes an outer shell 5 and a core 6, and the suction ring groove 1 is provided on the wall surface of the core 6.
- the inner wall surface and the outer wall surface of the core 6 form the ring guide path 2 and the reflux ring groove 3.
- the width b r of the suction ring groove 1 is distributed in an arc shape in the circumferential direction.
- the central angle of the arc of the width b r of the suction ring groove 1 alpha (not shown) is in the range of 0 ⁇ ⁇ 30 °, and the arc of the radius R
- the ratio with the impeller diameter D is in the range of 2 ⁇
- the downstream end 1b of the suction ring groove 1 corresponding to the arcuate distribution by design is a curve on the circumferential cylindrical surface of the core 6.
- the outer shell 5 of the casing 10 is fixed, and the core 6 is rotated around the rotation axis center ZZ of the impeller 13 (see FIG. 1).
- an arcuate distribution of the width b br of the suction ring groove 1 corresponding to different initial phase angles ⁇ 0 is obtained. That is, the outer shell 5 and the core 6 of the casing are connected by screws 7, and n (four in this example) screw holes are evenly arranged in the outer shell 5 of the casing 10 in the circumferential direction.
- Distribution curves corresponding to n different initial phase angles ⁇ 0 are obtained, and an optimum initial phase angle ⁇ 0 is determined by a performance test of the compressor.
- FIG. 6 is common to the first embodiment and is a schematic view of the position of the initial phase angle ⁇ 0 in the example. Obtained for example, in FIGS. 2A and 2B, the so a total of four screw holes in the outer shell 5 of the casing are opened, an arc-shaped distribution in the width b r of the suction ring groove 1 having different four shown in FIG. 13 It is done.
- FIG. 13 is a distribution schematic diagram of the width b r of the suction ring groove 1 corresponding to different initial phase angles ⁇ 0 .
- the solid line is an arc-shaped distribution in the circumferential direction of the width b r of the suction ring groove 1, based on varying the selection of the circumferential direction of the initial phase angle theta 0, there are a variety of representations.
- ⁇ 0 is an initial phase angle
- the casing 10 is a circle of one circumference of 0 ° ⁇ ⁇ 0 ⁇ 360 °
- ⁇ 0 to ⁇ 0 + 360 ° is an entire circumferential angle of the casing.
- the air in the flow path of the self-circulating casing treatment flows in from the suction ring groove 1 and flows out through the ring guide path 2 and the reflux ring groove 3 in the low flow rate mode.
- the specific operating principle is that the suction ring groove 1 of the self-circulating casing treatment sucks the gas in the impeller blade tip region and releases the gas from the return ring groove 3 through the ring guide path 2.
- the air in the flow path of the self-circulating casing treatment is discharged from the suction ring groove 1 through the reflux ring groove 3 and the ring guide path 2.
- the reflux ring groove 3 communicates the flow in the circumferential direction of the inlet, thereby increasing the uniformity of the flow at the compressor inlet, weakening the shock wave at the inlet, and the discharge flow of the suction ring groove 1 enhances the circulation capacity. By doing so, the occlusion boundary was expanded. However, due to the lack of suction power in the mode of operation close to blockage, the expansion of the casing treatment to the blockage boundary is less noticeable than the expansion to the stall boundary.
- the width b r of the suction ring groove 1 by employing the asymmetric self-circulation casing treatment of the centrifugal compressor is arcuate distribution are examples to expand the stable operating range .
- Figure 14 is a distribution schematic diagram of the width b r of the suction ring groove 1 in the second embodiment. Distribution in the width b r of the asymmetric casing treatment of the centrifugal compressor is as shown in FIG. 14.
- FIG. 15A is a graph showing the relationship between the normalized mass flow rate and the pressure ratio in Example 2.
- FIG. 15B is a graph showing the relationship between normalized mass flow rate and efficiency in Example 2.
- 15A and 15B show a non-axisymmetric self-circulating casing treatment ("asymmetric self-circulating CT"), an axisymmetric self-circulating casing treatment "axisymmetric self-circulating CT”), and a casing treatment. It is a performance comparison figure of a compressor in case of no ("No CT").
- asymmetric self-circulating casing treatment asymmetric self-circulating CT
- axisymmetric self-circulating casing treatment axisymmetric self-circulating CT
- the present invention employs an asymmetric self-circulating casing treatment in which the position (axial distance S r ) or width (width b r ) of the suction ring groove 1 is distributed in an arc shape as compared with the conventional technique.
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Abstract
Description
遠心圧縮機の小流量作動点(すなわち、圧縮機の流量が小さい場合)では、内部の流れ場において大幅な流体剥離などの不安定現象が生じて、失速ひいてはサージをもたらす。その結果、圧縮機の効率と圧力比の急速な低下を招き、寿命が短縮し、ひいては、短時間に損傷してしまう。そのため、様々な対策を採用することで、圧縮機の失速等の不安定現象を抑制して、その安定作動範囲を拡大させている。
図1Aにおいて、インペラ13は、インペラ全羽根11とインペラ半羽根12とを有する。またZ-Zはインペラ13の回転軸中心である。図1Aと図1Bに示すように、自己循環ケーシングトリートメントの構成は、一般的に、吸引リング溝1、リング案内路2、及び還流リング溝3からなる。自己循環ケーシングトリートメントの主な構成パラメータは、吸引リング溝1のインペラ全羽根前縁4に対する軸方向距離Srと、吸引リング溝の幅brと、還流リング溝3のインペラ全羽根前縁4に対する軸方向距離Sfと、還流リング溝3の幅bfと、還流リング溝3の深さhbと、リング案内路2の幅bb等である。
前記吸引リング溝の位置又は幅が、周方向において円弧状に分布し、該円弧の中心角αが0<α≦30°の範囲である、ことを特徴とするものである。
前記吸引リング溝(1)は、中子(6)の壁面に設けられ、前記外殻の内壁面と中子の外壁面が前記リング案内路(2)と還流リング溝(3)を形成する。
図2A、図2B、図3~図5は、本発明の第1実施形態を示す模式図であり、図2Aはケーシングの外殻5の正面模式図、図2Bは半断面模式図、図3はケーシングの模式図、図4はケーシングの中子6の構成模式図、図5は中子における吸引リング溝の模式図である。
自己循環流路とは、吸引リング溝1、リング案内路2、及び還流リング溝3により、インペラ全羽根前縁より下流側位置からインペラ全羽根前縁より上流側位置へ流体を戻す還流路を意味する。
すなわち、ケーシング10の外殻5と中子6は、ネジ7によって連結される。ケーシング10の外殻5には、周方向にn個(この例では4つ)のネジ孔が均等に配置されており、n個の異なる初期位相角θ0に対応する軸方向距離Srの分布曲線が得られる。圧縮機の性能試験によって、n個の異なる初期位相角θ0から最適な初期位相角θ0を確定する。
図2Aと図2Bにおいて、ケーシング10の外殻5に合計4つのネジ孔が設けられているので、図7に示される4種の異なる吸引リング溝1の軸方向距離Srの円弧状分布が得られる。
図7において、実線は、吸引リング溝1の軸方向距離Srの周方向における円弧状分布であり、周方向の初期位相角θ0の選定を変えることに基づき、多様な表現形式がある。そのうち、θ0は初期位相角であり、ケーシング10は0°≦θ0≦360°の1周の円であり、図中、θ0~θ0+360°はケーシング10の全周角度である。
具体的な作動原理は、自己循環ケーシングトリートメントの吸引リング溝1がインペラ翼端領域の気体を吸引し、リング案内路2を経て、還流リング溝3から気体を放出することにある。
周方向上の対応する位置で還流効果がより良くなるように、周方向において円弧状に分布した吸引リング溝1の溝位置(軸方向距離Sr)を用いることで、還流の作用をより効果的に用いて、圧縮機の安定作動範囲を拡大する。
図8は、実施例におけるSr値の分布模式図である。
遠心圧縮機の非対称ケーシングトリートメントのSr値の分布は、図8のように示される。初期位相角θ0は図6において、θ0=90°の位置である。
図9Aと図9Bは、溝位置が円弧状分布である非対称自己循環ケーシングトリートメント(「非対称自己循環CT」)と、軸対称自己循環ケーシングトリートメント(「軸対称自己循環CT」)と、ケーシングトリートメントのない(「CTなし」)の場合の圧縮機の性能比較図である。
図10~図12は、本発明の第2実施形態を示す模式図であり、図10は圧縮機のケーシング10の模式図、図11はケーシング10の中子6の構成模式図、図12は、中子6における吸引リング溝1の模式図である。
また、図2Aと図2Bは第1実施形態と共通である。
すなわち、ケーシングの外殻5と中子6は、ネジ7によって連結され、ケーシング10の外殻5には、周方向にn個(この例では4つ)のネジ孔が均等に配置されており、n個の異なる初期位相角θ0に対応する分布曲線が得られ、圧縮機の性能試験によって、最適な初期位相角θ0を確定する。
例えば、図2Aと図2Bにおいて、ケーシングの外殻5に合計4つのネジ孔が開けられているので、図13に示される4種の異なる吸引リング溝1の幅brの円弧状分布が得られる。
図13において、実線は、吸引リング溝1の幅brの周方向における円弧状の分布であり、周方向の初期位相角θ0の選定を変えることに基づき、多様な表現形式がある。そのうち、θ0は初期位相角であり、ケーシング10は0°≦θ0≦360°の1周の円であり、図中、θ0~θ0+360°はケーシングの全周角度である。
具体的な作動原理は、自己循環ケーシングトリートメントの吸引リング溝1がインペラ翼端領域の気体を吸引し、リング案内路2を経て、還流リング溝3から気体を放出することにある。
周方向上の対応する溝幅で還流効果がより良くなるように、周方向において円弧状に分布した吸引リング溝1の溝幅brを用いることで、還流の作用をより効果的に用いて、圧縮機の安定した作動範囲を拡大するようにする。
遠心圧縮機の非対称ケーシングトリートメントの幅brの分布は、図14のように示される。初期位相角θ0は図6において、θ0=90°の位置である。
図15Aと図15Bは、溝幅が円弧状分布である非軸対称自己循環ケーシングトリートメント(「非対称自己循環CT」)と、軸対称自己循環ケーシングトリートメント「軸対称自己循環CT」)と、ケーシングトリートメントのない(「CTなし」)の場合の圧縮機の性能比較図である。
1a 上流側端面、1b 下流側端面、
2 リング案内路、
3 還流リング溝、4 インペラ全羽根前縁、
5 外殻、6 中子、7 ネジ、
10 ケーシング、11 インペラ全羽根、
12 インペラ半羽根、13 インペラ
Claims (4)
- ケーシングの内周面に吸引リング溝(1)、リング案内路(2)、及び還流リング溝(3)を有し、自己循環流路を形成する非対称自己循環ケーシングトリートメントを有する遠心圧縮機において、
前記吸引リング溝の位置又は幅が、周方向において円弧状に分布し、該円弧の中心角αが0<α≦30°の範囲である、ことを特徴とする非対称自己循環ケーシングトリートメントを有する遠心圧縮機。 - 前記位置は、前記吸引リング溝の上流側端面のインペラ全羽根前縁(4)に対する軸方向距離Srであり、前記円弧の半径Rとインペラ直径Dとの比率が、2≦|R/D|≦40の範囲である、ことを特徴とする請求項1に記載の遠心圧縮機。
- 前記幅は、前記吸引リング溝の幅brであり、前記円弧の半径Rとインペラ直径Dとの比率が、2≦|R/D|≦20の範囲である、ことを特徴とする請求項1に記載の遠心圧縮機。
- 前記ケーシングは、外殻(5)と中子(6)からなり、
前記吸引リング溝(1)は、中子(6)の壁面に設けられ、前記外殻の内壁面と中子の外壁面が前記リング案内路(2)と還流リング溝(3)を形成する、ことを特徴とする請求項1乃至3のいずれかに記載の遠心圧縮機。
Priority Applications (3)
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EP11742160.2A EP2535595B1 (en) | 2010-02-09 | 2011-02-03 | Centrifugal compressor using an asymmetric self-recirculating casing treatment |
US13/578,101 US9151297B2 (en) | 2010-02-09 | 2011-02-03 | Centrifugal compressor having an asymmetric self-recirculating casing treatment |
JP2011553812A JP5430683B2 (ja) | 2010-02-09 | 2011-02-03 | 非軸対称自己循環ケーシングトリートメントを有する遠心圧縮機 |
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CN201010110273.3 | 2010-02-09 | ||
CN201010110230.5 | 2010-02-09 | ||
CN 201010110273 CN101761513B (zh) | 2010-02-09 | 2010-02-09 | 开槽宽度为圆弧分布的离心压气机非对称自循环处理机匣 |
CN 201010110230 CN101761512B (zh) | 2010-02-09 | 2010-02-09 | 开槽位置为圆弧分布的离心压气机非对称自循环处理机匣 |
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US9482240B2 (en) | 2013-07-31 | 2016-11-01 | Honeywell International Inc. | Compressor housing assembly for a turbocharger |
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EP2535595A4 (en) | 2018-03-21 |
EP2535595A1 (en) | 2012-12-19 |
US9151297B2 (en) | 2015-10-06 |
EP2535595B1 (en) | 2019-04-17 |
JP5430683B2 (ja) | 2014-03-05 |
JPWO2011099416A1 (ja) | 2013-06-13 |
US20120308371A1 (en) | 2012-12-06 |
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