US3478955A - Variable area diffuser for compressor - Google Patents

Variable area diffuser for compressor Download PDF

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Publication number
US3478955A
US3478955A US712114A US3478955DA US3478955A US 3478955 A US3478955 A US 3478955A US 712114 A US712114 A US 712114A US 3478955D A US3478955D A US 3478955DA US 3478955 A US3478955 A US 3478955A
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United States
Prior art keywords
wall
wall part
compressor
diffuser
ring
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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.)
Expired - Lifetime
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US712114A
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English (en)
Inventor
Fred K Kunderman
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Dresser Industries Inc
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Dresser Industries Inc
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F01D17/143—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path the shiftable member being a wall, or part thereof of a radial diffuser
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
    • F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
    • 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
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • a centrifugal compressor having a vaneless diffuser, one wall of which is defined by an annular member movable relative to the other wall to reduce or increase the width of the diffuser passage.
  • the annular wall is mounted on four posts which extend through openings in the compressor casing and guide the reciprocating movement of the wall.
  • the opposite ends of the posts are operatively coupled to helical cams in an annular control member mounted for rotation on the casing. Oscillation of the control member, by means of any suitable control mechanism, effects corresponding reciprocating movement of the movable annular wall.
  • One approach for extending the range of volume flow at which a constant speed centrifugal compressor will operate at peak efiiciency and for lowering the design flow rate point at which surge will occur is to provide a diffuser having a variable flow area which can be adjusted in accordance with the demanded fiow rate through the compressor. It is known to provide vaneless diffusers wherein one wall of the diffuser passage is an annular member which may be moved relative to the other to vary the diffuser width.
  • An object of this invention is to provide a centrifugal compressor having a vaneless diffuser with one variable wall defined by an annular member, and an improved mechanism for adjusting the position of the movable wall in accordance with desired conditions.
  • a centrifugal compressor is provided with a vaneless annular diffuser passage or channel which communicates the compression chamber with the discharge chamber, one of the opposing walls of the diffuser chamber being defined by an annular wall 3,478,955 Patented Nov. 18, 1969 member movable relative to the opposing wall.
  • the annular wall member is supported and guided for reciprocating movement in the compressor casing by parallel posts.
  • the posts are coupled at their opposite ends to an annular control member, mounted for rotation on the compressor casing, having cams for effecting reciprocation of the wall member in response to oscillation of the control member.
  • FIG. 1 is a sectional view of a centrifugal compressor in a plane through the impeller axis
  • FIG. 2 is a fragmentary view of the compressor looking toward the inlet side thereof, along the line 2-2 of FIG. 1;
  • FIG. 3 is a sectional view of a portion of the control assembly as viewed along the line 3-3 of FIG. 2.
  • centrifugal compressor 10 having a casing defined by casing portions 10 and 11, secured together adjacent the outer peripheries by suitable bolts.
  • the compressor casing defines a compression chamber between the inlet nozzle 12, in the casing portion 10, and the annular discharge chamber 13, adjacent to the outer periphery of the casing.
  • An im peller 14 having blades 15 to mounted for rotation within the compression chamber, being secured to a suitable shaft 16 which extends through an opening 17 in the casing portion 11.
  • the opening 17 may accommodate suitable seal or bearing housings for the impeller shaft.
  • a vaneless diffuser Surrounding the impeller 14 is a vaneless diffuser which is an annular radially directed passage 20 communicating the outer periphery of the impeller 14 and the discharge chamber 13.
  • a fixed wall of the diffuser passage is defined by the casing portion 11; and a movable wall 21 of the diffuser passage is defined by an annular member which is disposed in an annular groove 22 in the casing portion 10 concentric with the axis of rotation of the impeller.
  • the movable wall member is generally rectangular in cross section, with the surface defining the diffuser wall surface being contoured for smooth air flow.
  • the annular groove 22 is generally rectangular in cross section, and is dimensioned to receive the movable wall member with a relatively close fit.
  • the movable wall 21 is supported and guided for reciprocating axial movement on four cylindrical posts 23 which extend through cylindrical bores 24 in the casing portion 10, these bores being parallel to each other and being circumferentially equally spaced concentric with the impeller axis.
  • the posts 23 are dimensioned for a close sliding fit within the respective bores 24; and the posts are provided with threaded studs 25 and 26 projecting from opposite ends thereof.
  • the posts 23 are rigidly secured to the movable wall 21 by the threaded engagement of the studs 25 in suitable threaded holes in the movable wall member.
  • sealing devices are provided at the inner and outer peripheries of the wall member.
  • An inner piston type seal ring 27 is disposed in a suitable annular groove in the inner cylindrical wall of the annular groove 22 to provide a seal between this cylindrical wall and the inner cylindrical wall of the wall member 21.
  • An outer seal ring 28 is disposed in an annular groove in the outer cylindrical wall of the movable wall member 21 to provide a seal between this cylindrical wall and the outer cylindrical wall of the annular groove 22.
  • vent this trapped pocket there is created a trapped pocket or space between the movable wall member and the bottom of the annular groove 22. It is desirable to vent this trapped pocket; and this is accomplished by providing one or more vent passages 29 through the movable wall member. Preferably, these vent passages open to the diffuser side of the wall member at a precise radial location, again because of the pressure gradient across the movable wall member.
  • the radial location is selected so that the pressure extant in the trapped pocket and acting on the movable wall member corresponds to the average pressure acting on the diffuser side of the movable wall, that is that the forces acting on the opposite sides of the movable wall are balanced so as not to effect the positioning of the movable wall by the means to be described,
  • O-ring seals are disposed in suitable annular grooves in the cylindrical walls of the posts 23 for sealing engagement with the walls of the bores 24.
  • the movable diffuser wall 21 is mounted and guided for reciprocating axial movement relative to the fixed diffuser wall, is prevented from rotation relative to the casing, and is gastightly sealed in the casing.
  • the reciprocating movement of the movable diffuser wall 21 is controlled by a control member 32, which is an annular ring member mounted for rotation on the exterior of the casing portion concentric with the impeller axis.
  • the inlet nozzle 12 of the casing portion 10 defines an outer cylindrical surface within which is provided an external ball race 33; and the inner cylindrical surface of the control ring 32 is provided with a complementary ball race 34. With suitable balls 42, then, the control ring 32 is rotatably secured to the housing portion 10 and prevented from relative axial movement.
  • the control rin 32 provides angularly equally spaced helical cams 35 wh ch are defined by inclined arcuate webs 36, the webs being divided radially by arcuate slots 37 concentric with the axis of rotation of the control ring.
  • the helical cams 35 are so related to the posts 23 that the post studs 26 extend through the respective slots 37.
  • the opposite faces of the webs 36 are engaged by bearing members 38 in the form of wedge-shaped washers having bosses 39 which extend into the slots 37, two of which are positioned over each of the respective threaded studs 26 and secured thereon by means of suitable nuts.
  • These bearing members may be fabricated of a suitable bearing material such as oilite bronze, and function as followers of the helical cams.
  • Each of the helical cams has the same relation to the plane of rotation of the control ring 32 so that as the control ring is oscillated the movable diffuser wall is positioned in selected parallel planes relative to the fixed diffuser wall.
  • a control arm 40 is suitably secured to the control ring 32; and this may be actuated by any suitable control mechanism to oscillate the control ring in response to the operating conditions of the compressor, for example.
  • the above described mechanism provides a very positive and precise control for varying the width of the diffuser passage 20.
  • a centrifugal compressor comprising a casing defining a compression chamber and an annular discharge chamber; an impeller disposed in said compression chamber;
  • annular diffuser passage communicating said compression chamber and said discharge chamber, defined by confronting walls at least one of which is movable relative to the other to enlarge or restrict said diffuser passage;
  • said movable wall comprising a ring member disposed for axial movement relative to said casing; said ring member being supported on a plurality of posts which extend in a direction parallel to the axis of said impeller; means on said casing for" guiding the rectilinear movement of said posts parallel to the axis of said impeller;
  • control member mounted for rotation on said casing in axial alignment with said movable wall and parallel thereto; said control member defining a plurality of cams, each of said cams being defined by opposed surfaces of said control member inclined along an are relative to the plane of rotation of said control member;
  • a centrifugal compressor as set forth in claim 3 including sliding seal rings for the adjoining cylindrical surfaces of said movable wall and said annular groove.
  • a centrifugal compressor as set forth in claim 3 including seal means between the inner walls of said annular groove and said movable wall member, and between the outer walls of said annular groove and said movable wall member for preventing gas flow radially through said annular groove.
  • a centrifugal compressor as set forth in claim 5 including vent means through said movable wall for venting the annular space between said wall and the bottom of said annular groove; said vent means opening to the diffuser side of said movable wall at a predetermined radial position, such that the forces acting on the opposite sides thereof are controlled.
  • each of said posts includes an axially extending stud extending through an arcuate slot in said control member; and a pair of bearing members supported on said stud for sliding engagement with the opposite faces of the associated cam web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US712114A 1968-03-11 1968-03-11 Variable area diffuser for compressor Expired - Lifetime US3478955A (en)

Applications Claiming Priority (1)

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US71211468A 1968-03-11 1968-03-11

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US3478955A true US3478955A (en) 1969-11-18

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US (1) US3478955A (cs)
DE (1) DE1913048A1 (cs)
FR (1) FR2003644A1 (cs)
GB (1) GB1231152A (cs)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2162466A1 (cs) * 1971-12-06 1973-07-20 H R Electronics Co
US3941498A (en) * 1974-04-08 1976-03-02 Chandler Evans Inc. Variable geometry collector for centrifugal pump
US4403914A (en) * 1981-07-13 1983-09-13 Teledyne Industries, Inc. Variable geometry device for turbomachinery
US4499731A (en) * 1981-12-09 1985-02-19 Bbc Brown, Boveri & Company, Limited Controllable exhaust gas turbocharger
US4538410A (en) * 1982-07-07 1985-09-03 A/S Kongsberg Vapenfabrikk Compressor diffuser non-return valve and method for starting gas turbine engines
US4544325A (en) * 1980-10-22 1985-10-01 Teledyne Industries, Inc. Variable geometry device for turbine compressor outlet
US4557665A (en) * 1982-05-28 1985-12-10 Helset Engineering Company Limited Variable inlet area turbine
US4844690A (en) * 1985-01-24 1989-07-04 Carrier Corporation Diffuser vane seal for a centrifugal compressor
WO2000020726A1 (en) 1998-10-05 2000-04-13 Alliedsignal, Inc. Actuating mechanism for sliding vane variable geometry turbine
WO2004053336A1 (en) * 2002-12-06 2004-06-24 York International Corporation Variable geometry diffuser mechanism
US20040128997A1 (en) * 2002-11-19 2004-07-08 John Parker Variable geometry turbine
US20040216466A1 (en) * 2003-03-12 2004-11-04 Werner Bosen Expansion turbine stage
US20050262841A1 (en) * 2002-11-19 2005-12-01 John Parker Variable geometry turbine
US20070196206A1 (en) * 2006-02-17 2007-08-23 Honeywell International, Inc. Pressure load compressor diffuser
US20080031732A1 (en) * 2005-11-30 2008-02-07 Dresser-Rand Company Closure device for a turbomachine casing
US20080089782A1 (en) * 2005-06-07 2008-04-17 Parker John F Variable geometry turbine
CN100427768C (zh) * 2006-12-29 2008-10-22 清华大学 离心压气机可控型面无叶扩压器
US20080304953A1 (en) * 2007-06-05 2008-12-11 Chen Robert P Augmented vaneless diffuser containment
US7658068B2 (en) 2002-11-19 2010-02-09 Cummins Inc. Method of controlling the exhaust gas temperature for after-treatment systems on a diesel engine using a variable geometry turbine
US20100260595A1 (en) * 2008-03-27 2010-10-14 International Engine Intellectual Property Company, Llc Flow regulation mechanism for turbocharger compressor
US20120034071A1 (en) * 2010-03-09 2012-02-09 Toyota Jidosha Kabushiki Kaisha Diffuser apparatus, centrifugal compressor, and turbo supercharger
US20120230817A1 (en) * 2009-11-17 2012-09-13 Toyota Jidosha Kabushiki Kaisha Centrifugal compressor and turbocharger
US20130064682A1 (en) * 2010-12-22 2013-03-14 Lin Sun Variable-speed oil-free refrigerant centrifugal compressor with variable geometry diffuser
US20140248142A1 (en) * 2013-03-01 2014-09-04 Rolls-Royce Plc Gas turbine engine impeller system for an intermediate pressure (ip) compressor
US20140328667A1 (en) * 2012-11-09 2014-11-06 Susan J. NENSTIEL Variable geometry diffuser having extended travel and control method thereof
EP2924299A1 (en) * 2014-03-26 2015-09-30 Kabushiki Kaisha Toyota Jidoshokki Centrifugal compressor
US20160208808A1 (en) * 2013-08-26 2016-07-21 Gree Electric Appliances, Inc. Of Zhuhai Regulator assembly and centrifugal compressor
US20160265549A1 (en) * 2015-03-09 2016-09-15 Caterpillar Inc. Compressor assembly having dynamic diffuser ring retention
CN106703980A (zh) * 2015-11-12 2017-05-24 财团法人工业技术研究院 涡轮进气控制装置及进气控制方法
CN107859658A (zh) * 2017-10-27 2018-03-30 江苏大学 一种可调节开度的射流自吸系统
US10472982B2 (en) 2014-05-07 2019-11-12 Cummins Ltd. Variable geometry turbine assembly
EP3406915B1 (en) * 2017-05-23 2021-07-14 Rolls-Royce Corporation Centrifugal compressor having a variable diffuser with axially translating end wall
US20210348622A1 (en) * 2018-12-17 2021-11-11 Gree Electric Appliances, Inc. Of Zhuhai Centrifugal Compressor and Diffuser
US11421699B2 (en) 2017-09-25 2022-08-23 Johnson Controls Tyco IP Holdings LLP Compact variable geometry diffuser mechanism

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01219397A (ja) * 1988-02-26 1989-09-01 Hitachi Ltd 遠心圧縮機のディフューザ
GB2218743A (en) * 1988-05-17 1989-11-22 Holset Engineering Co Variable geometry turbine
GB2218745B (en) * 1988-05-17 1992-07-01 Holset Engineering Co Variable geometry turbine actuator assembly
EP0654587B1 (en) * 1993-11-19 1999-01-20 Holset Engineering Company Limited Turbine with variable inlet geometry
EP1660760B1 (en) * 2003-08-14 2008-08-13 Honeywell International, Inc. Variable diffuser with movable wall
JP4853263B2 (ja) * 2006-12-07 2012-01-11 株式会社豊田自動織機 遠心圧縮機
WO2015030723A1 (en) 2013-08-27 2015-03-05 Danfoss Turbocor Compressors B.V. Compressor including flow control and electromagnetic actuator
DE102015202375A1 (de) * 2015-02-11 2016-08-11 Robert Bosch Gmbh Radialverdichter, Abgasturbolader und entsprechendes Verfahren zum Betreiben eines Radialverdichters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2285976A (en) * 1940-01-15 1942-06-09 Gen Electric Centrifugal compressor
US3032259A (en) * 1957-12-23 1962-05-01 Sulzer Ag Turbocompressor having a radial diffuser
US3150650A (en) * 1961-09-29 1964-09-29 Caterpillar Tractor Co Variable area diffuser for compressor
US3349997A (en) * 1965-05-05 1967-10-31 Ckd Praha Adjustable diffuser blades
US3365120A (en) * 1964-05-11 1968-01-23 Sulzer Ag Turbine radial diffuser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2285976A (en) * 1940-01-15 1942-06-09 Gen Electric Centrifugal compressor
US3032259A (en) * 1957-12-23 1962-05-01 Sulzer Ag Turbocompressor having a radial diffuser
US3150650A (en) * 1961-09-29 1964-09-29 Caterpillar Tractor Co Variable area diffuser for compressor
US3365120A (en) * 1964-05-11 1968-01-23 Sulzer Ag Turbine radial diffuser
US3349997A (en) * 1965-05-05 1967-10-31 Ckd Praha Adjustable diffuser blades

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2162466A1 (cs) * 1971-12-06 1973-07-20 H R Electronics Co
US3941498A (en) * 1974-04-08 1976-03-02 Chandler Evans Inc. Variable geometry collector for centrifugal pump
US4544325A (en) * 1980-10-22 1985-10-01 Teledyne Industries, Inc. Variable geometry device for turbine compressor outlet
US4403914A (en) * 1981-07-13 1983-09-13 Teledyne Industries, Inc. Variable geometry device for turbomachinery
US4499731A (en) * 1981-12-09 1985-02-19 Bbc Brown, Boveri & Company, Limited Controllable exhaust gas turbocharger
US4557665A (en) * 1982-05-28 1985-12-10 Helset Engineering Company Limited Variable inlet area turbine
US4538410A (en) * 1982-07-07 1985-09-03 A/S Kongsberg Vapenfabrikk Compressor diffuser non-return valve and method for starting gas turbine engines
US4844690A (en) * 1985-01-24 1989-07-04 Carrier Corporation Diffuser vane seal for a centrifugal compressor
WO2000020726A1 (en) 1998-10-05 2000-04-13 Alliedsignal, Inc. Actuating mechanism for sliding vane variable geometry turbine
US20050262841A1 (en) * 2002-11-19 2005-12-01 John Parker Variable geometry turbine
US20040128997A1 (en) * 2002-11-19 2004-07-08 John Parker Variable geometry turbine
US7658068B2 (en) 2002-11-19 2010-02-09 Cummins Inc. Method of controlling the exhaust gas temperature for after-treatment systems on a diesel engine using a variable geometry turbine
US7475540B2 (en) 2002-11-19 2009-01-13 Holset Engineering Co., Limited Variable geometry turbine
US6931849B2 (en) * 2002-11-19 2005-08-23 Holset Engineering Company, Limited Variable geometry turbine
US6872050B2 (en) 2002-12-06 2005-03-29 York International Corporation Variable geometry diffuser mechanism
JP2006509155A (ja) * 2002-12-06 2006-03-16 ヨーク・インターナショナル・コーポレーション 可変容量式遠心圧縮機用のディフューザーシステム
JP2010031876A (ja) * 2002-12-06 2010-02-12 York Internatl Corp ディフューザーシステム
CN1745253B (zh) * 2002-12-06 2010-06-09 约克国际公司 几何形状可变的扩散器机构
WO2004053336A1 (en) * 2002-12-06 2004-06-24 York International Corporation Variable geometry diffuser mechanism
US6948320B2 (en) * 2003-03-12 2005-09-27 Atlas Copco Energas Gmbh Expansion turbine stage
US20040216466A1 (en) * 2003-03-12 2004-11-04 Werner Bosen Expansion turbine stage
US20080089782A1 (en) * 2005-06-07 2008-04-17 Parker John F Variable geometry turbine
US8172516B2 (en) * 2005-06-07 2012-05-08 Cummins Turbo Technologies Limited Variable geometry turbine
US20080031732A1 (en) * 2005-11-30 2008-02-07 Dresser-Rand Company Closure device for a turbomachine casing
US7850427B2 (en) * 2005-11-30 2010-12-14 Dresser-Rand Company Closure device for a turbomachine casing
US20070196206A1 (en) * 2006-02-17 2007-08-23 Honeywell International, Inc. Pressure load compressor diffuser
CN100427768C (zh) * 2006-12-29 2008-10-22 清华大学 离心压气机可控型面无叶扩压器
US7871243B2 (en) * 2007-06-05 2011-01-18 Honeywell International Inc. Augmented vaneless diffuser containment
US20080304953A1 (en) * 2007-06-05 2008-12-11 Chen Robert P Augmented vaneless diffuser containment
US8070416B2 (en) * 2008-03-27 2011-12-06 International Engine Intellectual Property Company, Llc Flow regulation mechanism for turbocharger compressor
US20100260595A1 (en) * 2008-03-27 2010-10-14 International Engine Intellectual Property Company, Llc Flow regulation mechanism for turbocharger compressor
US8689552B2 (en) * 2009-11-17 2014-04-08 Toyota Jidosha Kabushiki Kaisha Centrifugal compressor and turbocharger
US20120230817A1 (en) * 2009-11-17 2012-09-13 Toyota Jidosha Kabushiki Kaisha Centrifugal compressor and turbocharger
US20120034071A1 (en) * 2010-03-09 2012-02-09 Toyota Jidosha Kabushiki Kaisha Diffuser apparatus, centrifugal compressor, and turbo supercharger
US8403635B2 (en) * 2010-03-09 2013-03-26 Toyota Jidosha Kabushiki Kaisha Diffuser apparatus, centrifugal compressor, and turbo supercharger
CN103261701B (zh) * 2010-12-22 2016-03-16 丹佛斯公司 具有可变几何形状的扩散器的变速无油致冷剂离心压缩机
US9212667B2 (en) * 2010-12-22 2015-12-15 Danfoss A/S Variable-speed oil-free refrigerant centrifugal compressor with variable geometry diffuser
CN103261701A (zh) * 2010-12-22 2013-08-21 丹佛斯特波科尔压缩机有限公司 具有可变几何形状的扩散器的变速无油致冷剂离心压缩机
US20130064682A1 (en) * 2010-12-22 2013-03-14 Lin Sun Variable-speed oil-free refrigerant centrifugal compressor with variable geometry diffuser
US10378553B2 (en) * 2012-11-09 2019-08-13 Johnson Controls Technology Company Variable geometry diffuser having extended travel and control method thereof
US20140328667A1 (en) * 2012-11-09 2014-11-06 Susan J. NENSTIEL Variable geometry diffuser having extended travel and control method thereof
US11092166B2 (en) 2012-11-09 2021-08-17 Johnson Controls Technology Company Variable geometry diffuser having extended travel and control method thereof
US20140248142A1 (en) * 2013-03-01 2014-09-04 Rolls-Royce Plc Gas turbine engine impeller system for an intermediate pressure (ip) compressor
US9683488B2 (en) * 2013-03-01 2017-06-20 Rolls-Royce North American Technologies, Inc. Gas turbine engine impeller system for an intermediate pressure (IP) compressor
US20160208808A1 (en) * 2013-08-26 2016-07-21 Gree Electric Appliances, Inc. Of Zhuhai Regulator assembly and centrifugal compressor
US10082147B2 (en) * 2013-08-26 2018-09-25 Gree Electric Appliances, Inc. Of Zhuhai Regulator assembly and centrifugal compressor
EP2924299A1 (en) * 2014-03-26 2015-09-30 Kabushiki Kaisha Toyota Jidoshokki Centrifugal compressor
US20150275917A1 (en) * 2014-03-26 2015-10-01 Kabushiki Kaisha Toyota Jidoshokki Centrifugal Compressor
US9874226B2 (en) * 2014-03-26 2018-01-23 Kabushiki Kaisha Toyota Jidoshokki Centrifugal compressor
US10472982B2 (en) 2014-05-07 2019-11-12 Cummins Ltd. Variable geometry turbine assembly
US20160265549A1 (en) * 2015-03-09 2016-09-15 Caterpillar Inc. Compressor assembly having dynamic diffuser ring retention
CN106703980A (zh) * 2015-11-12 2017-05-24 财团法人工业技术研究院 涡轮进气控制装置及进气控制方法
EP3406915B1 (en) * 2017-05-23 2021-07-14 Rolls-Royce Corporation Centrifugal compressor having a variable diffuser with axially translating end wall
US11421699B2 (en) 2017-09-25 2022-08-23 Johnson Controls Tyco IP Holdings LLP Compact variable geometry diffuser mechanism
US11971043B2 (en) 2017-09-25 2024-04-30 Tyco Fire & Security Gmbh Compact variable geometry diffuser mechanism
CN107859658B (zh) * 2017-10-27 2019-02-19 江苏大学 一种可调节开度的射流自吸系统
CN107859658A (zh) * 2017-10-27 2018-03-30 江苏大学 一种可调节开度的射流自吸系统
US20210348622A1 (en) * 2018-12-17 2021-11-11 Gree Electric Appliances, Inc. Of Zhuhai Centrifugal Compressor and Diffuser
US11578733B2 (en) * 2018-12-17 2023-02-14 Gree Electric Appliances, Inc. Of Zhuhai Centrifugal compressor and diffuser

Also Published As

Publication number Publication date
FR2003644A1 (cs) 1969-11-14
DE1913048A1 (de) 1970-02-26
GB1231152A (cs) 1971-05-12

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