EP2626573A1 - Radialverdichter - Google Patents

Radialverdichter Download PDF

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Publication number
EP2626573A1
EP2626573A1 EP12185119.0A EP12185119A EP2626573A1 EP 2626573 A1 EP2626573 A1 EP 2626573A1 EP 12185119 A EP12185119 A EP 12185119A EP 2626573 A1 EP2626573 A1 EP 2626573A1
Authority
EP
European Patent Office
Prior art keywords
variable diffuser
centrifugal compressor
pins
rotating member
flow passage
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
Application number
EP12185119.0A
Other languages
English (en)
French (fr)
Other versions
EP2626573B1 (de
Inventor
Taejin Kang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP2626573A1 publication Critical patent/EP2626573A1/de
Application granted granted Critical
Publication of EP2626573B1 publication Critical patent/EP2626573B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • 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

  • the present invention relates to centrifugal compressors, and more particularly to a centrifugal compressor in which regulating accuracy of flow passage opening of a variable diffuser is enhanced.
  • An air conditioner is a machine for cooling/heating or cleaning air of a room.
  • the air conditioner has a cycle in which refrigerant therein circulates in an order of compression, condensation, expansion, and evaporation to transfer heat.
  • a compressor in the air conditioner provided on a refrigerant flow passage serves to compress the refrigerant to a high temperature and a high pressure.
  • the compressor there are rotary compressors, scroll compressors, and centrifugal compressors depending on a compression type.
  • the centrifugal compressor a machine for compressing the refrigerant introduced thereto by centrifugal force of an impeller rotating at a high speed, has high compression efficiency.
  • the centrifugal compressor is provided with the impeller for rotating fluid introduced thereto, and a variable diffuser for regulating opening of a fluid flow passage to compress the fluid.
  • the centrifugal compressor is also provided with a power transmission member connected between the variable diffuser and a motor which is a driving source of the variable diffuser for transmission of driving power from the motor to the variable diffuser.
  • the power transmission member serves, not only a function of the transmission of the driving power from the motor, but also a function of converting a rotation motion of the motor to a linear motion or another direction rotation motion.
  • As the power transmission member a combination of plain gears, a cam, or a link is used.
  • the power transmission member has a low rotation torque (N ⁇ m) to require a large movement in regulating flow passage opening of the variable diffuser by operation of the motor
  • the related art variable diffuser has difficulty in controlling accurate flow passage opening.
  • calculation of a distance of movement of the power transmission member in relation to the rotation of the motor has been complicate.
  • the present invention is directed to a centrifugal compressor.
  • An object of the present invention is to provide a centrifugal compressor which can make precise control of flow passage opening regulation of a variable diffuser.
  • a centrifugal compressor includes a case, an impeller for accelerating refrigerant introduced to an inside of the case, a variable diffuser on a flow passage of the refrigerant for regulating opening of the flow passage, a rotating member mounted to move the variable diffuser up/down and to rotate the variable diffuser, and a drive motor for providing rotating power to the rotating member, wherein the variable diffuser is screw coupled to an inside of the case to regulate the opening of the flow passage as the variable diffuser moves up/down by rotation.
  • the rotating member has a helix formed on a side thereof, and the drive motor has a gear engaged with the side of the rotating member.
  • the rotating member is a worm wheel and the gear is a worm.
  • the worm and the worm wheel have a reduction ratio (A ratio of rotation speeds between the worm and the worm wheel) of over 50:1 therebetween.
  • variable diffuser has a side with a plurality of pins
  • rotating member has a plurality of inserting holes for inserting the plurality of pins therein, respectively.
  • the rotating member has a side with a plurality of pins
  • the variable diffuser has a plurality of inserting holes for inserting the plurality of pins therein, respectively.
  • the pin has a length longer than a moving up/down distance of the variable diffuser.
  • the plurality of pins rotate in one body with the rotating member, and moves up/down within the inserting hole following moving up/down of the variable diffuser.
  • the rotation member has a rotation direction perpendicular to the rotation direction of the drive motor.
  • variable diffuser has a shape of a ring which surrounds an outside circumference of the impeller.
  • the case includes a shroud having a refrigerant inlet formed therein, and a supporting member arranged spaced from the shroud to form a space for housing the impeller and forming a flow passage of compressed refrigerant on an outside circumference of the impeller, wherein the supporting member has a ring shaped inserting portion screw coupled to the variable diffuser.
  • the drive motor is a step motor.
  • a centrifugal compressor in another aspect of the present invention, includes a case, an impeller for accelerating refrigerant introduced to an inside of the case, a variable diffuser provided on a flow passage of the refrigerant to have a plurality of pins on one side thereof, a worm wheel positioned to face the one side of the variable diffuser to have a plurality of inserting holes for inserting the pins therein respectively, and a drive motor having a worm engaged with the worm wheel, wherein the variable diffuser is screw coupled to an inside of the case to regulate opening of the flow passage as the variable diffuser moves up/down by rotation.
  • the plurality of pins rotate in one body with the worm wheel, and moves up/down within the inserting hole following moving up/down of the variable diffuser.
  • the pin has a length longer than a moving up/down distance of the variable diffuser.
  • the worm and the worm wheel have a reduction ratio (A ratio of rotation speed between the worm and the worm wheel) of over 50:1 therebetween.
  • variable diffuser has a shape of a ring which surrounds an outside circumference of the impeller.
  • the case includes a shroud having a refrigerant inlet formed therein, and a supporting member arranged spaced from the shroud to form a space for housing the impeller and forming a flow passage of compressed refrigerant on an outside circumference of the impeller, wherein the supporting member has a ring shaped inserting portion screw coupled to the variable diffuser.
  • the centrifugal compressor of the present invention has the following advantages.
  • variable diffuser screw coupled to the case while rotating in one body with the worm wheel by operation of the drive motor having the worm provided thereto permits regulation of opening of the flow passage of the refrigerant.
  • the use of the worm and the worm wheel having a large reduction ratio as a power transmission member permits precise regulation of opening of the flow passage according to operation of the drive motor.
  • FIG. 1 illustrates a section of a centrifugal compressor in accordance with a preferred embodiment of the present invention.
  • FIG. 2 illustrates a partial enlarged view of a centrifugal compressor having a variable diffuser in accordance with a preferred embodiment of the present invention.
  • FIG. 3 illustrates a perspective view showing an impeller, a variable diffuser, and a supporting member in accordance with a preferred embodiment of the present invention.
  • FIG. 4 illustrates a perspective view showing an operation state of a variable diffuser in relation to operation of a drive motor in accordance with a preferred embodiment of the present invention.
  • FIG. 5 illustrates a partial enlarged view of a compressor showing a state in which a variable diffuser closes a flow passage in accordance with a preferred embodiment of the present invention.
  • FIG. 1 illustrates a section of a centrifugal compressor in accordance with a preferred embodiment of the present invention
  • FIG. 2 illustrates a partial enlarged view of a variable diffuser and an impeller in accordance with a preferred embodiment of the present invention.
  • the case 110 which serves to form an exterior of the centrifugal compressor and to support components therein.
  • the case 110 has a refrigerant inlet 111 for introduction of refrigerant thereto and a refrigerant outlet 112 for discharging compressed refrigerant therefrom.
  • the case 110 includes a shroud 113 which is an extension from the refrigerant inlet 111 for guiding the refrigerant introduced thus to an impeller 120.
  • the shroud 113 has a streamlined inside for reducing resistance to the refrigerant being introduced thereto thus.
  • the case 110 includes a supporting member 114 spaced a predetermined distance from the shroud 113.
  • the supporting member 114 has the impeller 120 and the variable diffuser 130 fixedly secured thereto.
  • the supporting member 114 is positioned spaced from the shroud 113 to form a space for housing the impeller 120 between the shroud 113 and the supporting member 114.
  • a space for housing the impeller 120 is formed at a center portion between the shroud 113 and the supporting member 114, and a flow passage P is formed on an outside circumference of the center portion for flow of the refrigerant accelerated by the impeller 120.
  • the case 110 includes a volute member 115 which forms a volute B space between the case 110 and the supporting member 114.
  • the volute B formed between the volute member 115 and the supporting member 114 is a space the refrigerant compressed thus passes.
  • the refrigerant passed through the volute B is discharged to an outside of the centrifugal compressor through the refrigerant outlet 112.
  • the impeller 120 rotates to accelerate the refrigerant introduced thereto to a high speed.
  • the impeller 120 is arranged between the shroud 113 and the supporting member 114 connected to a driving shaft 142 of a compression motor 140 positioned in the case 110.
  • the impeller 120 includes a hub 122 coupled to the driving shaft 142, and an impeller vane 122 provided to a surface of the hub 122.
  • variable diffuser 130 regulates opening of the flow passage P for increasing a pressure of the refrigerant. That is, the variable diffuser 130 reduces the opening of the flow passage P to increase flow resistance of the refrigerant for converting kinetic energy of the refrigerant accelerated by the impeller 120 thus to pressure energy.
  • the variable diffuser 130 is provided on the refrigerant flow passage P, and as an embodiment, may be arranged at a region which surrounds an outside circumference of the impeller 120 in a space between the shroud 113 and the supporting member 114.
  • variable diffuser 130 moves up/down in the case 110 to regulate the opening of the flow passage P. That is, as the variable diffuser 130 moves up on the refrigerant flow passage P, the opening of the flow passage P is reduced, or as the variable diffuser 130 moves down on the refrigerant flow passage P, the opening of the flow passage P is increased.
  • variable diffuser 130 may be screw coupled to the case 110.
  • the supporting member 114 may have an inserting portion formed therein for screw coupling to the variable diffuser 130, for enabling to insert the variable diffuser 130 or draw out the variable diffuser 130 in/from the insert portion.
  • the variable diffuser 130 can move up/down by rotation of the variable diffuser 130.
  • the rotating member mounted to make the variable diffuser 130 to move up/down, and has a function of rotating the variable diffuser 130.
  • the rotating member being a power transmission member, not only transmits rotating power from the driving motor 150 to the variable diffuser 130, but also changes a direction of rotating movement of the drive motor 150.
  • variable diffuser 130 has one side with a plurality of pins, and the rotating member may have a plurality of inserting holes for inserting the plurality of pins therein, respectively. That is, since the pins of the variable diffuser 130 are respectively inserted in the inserting holes in the rotating member, transmitting the rotating power from the rotating member to the variable diffuser 130 through the pins, the rotating member and the variable diffuser 130 rotate in one unit. In this instance, since the variable diffuser 130 is screw coupled to the case 110, the variable diffuser 130 moves up or down by the rotation of the variable diffuser 130.
  • variable diffuser 130 can move up/down, without having the pins secured to, but having the pins inserted in, the inserting holes in the rotating member, the variable diffuser 130 can be mounted to the rotating member to be movable up/down by the rotation of the variable diffuser 130. And, by forming the pin to have a length longer than a distance of the up/down movement of the variable diffuser 130, the rotating power can be transmitted from the rotating member to the variable diffuser 130 within a move up/down range while preventing the pin from breaking away from the inserting hole.
  • the rotating member may have one side with a plurality of pins and the variable diffuser 130 may have a plurality of inserting holes for inserting the plurality of the pins therein, respectively. That is, the pins may transmit the rotating power from the rotating member to the variable diffuser 130 while the pins are fixedly secured to the rotating member, and the variable diffuser 130 may move up/down while rotating.
  • the drive motor 150 provides the driving power to the rotating member.
  • the drive motor 150 is connected to the rotating member to serve as a driving source for rotating the rotating member.
  • the rotating member may have a side with a helix formed thereon, and the drive motor 150 may have a gear engaged with the side of the rotating member. According to this, at the same time with the rotation of the gear following operation of the drive motor 150, the rotating member engaged with the gear may rotate.
  • the rotating member may be a worm wheel
  • the gear provided to the drive motor 150 may be a worm.
  • the present invention may use the worm and the worm wheel for precise control of a distance of the up/down movement of the variable diffuser 130 by the rotation of the drive motor 150, and has an effect of production cost saving as an expensive motor can be dispensed with, which will be described in detail, later.
  • the rotating member may have a rotation direction perpendicular to a rotation direction of the drive motor 150. Since the rotation direction of the rotating member is perpendicular to the rotation direction of the drive motor 150, enabling to arrange the drive motor 150 on a side of the rotating member, a space can be used effectively, thereby permitting to fabricate the compressor smaller.
  • the drive motor 150 may be a step motor.
  • the step motor enables to control a number of revolutions per unit time period, a rotation angle, and a rotation direction, enabling to control the operation of the rotating member according to a preset algorithm.
  • variable diffuser 130 in accordance with a preferred embodiment of the present invention will be described with reference to the attached drawings, in detail.
  • FIG. 3 illustrates a perspective view showing a coupled structure of a variable diffuser and a supporting member in accordance with a preferred embodiment of the present invention
  • FIG. 4 illustrates a perspective view showing an operation state of a variable diffuser by using a worm gear in accordance with a preferred embodiment of the present invention.
  • variable diffuser 130 has a ring shape surrounding an outside circumference of the impeller 120 within the case 110.
  • the variable diffuser 130 may be inserted in, or drawn out of, an inserting portion 114a in the supporting member 114 of the case 110. That is, the variable diffuser 130 may be inserted in the inserting portion 114a to open the flow passage P fully, or the variable diffuser 130 may be moved up to be drawn out of the inserting portion 114a to reduce the opening of the flow passage P.
  • variable diffuser 130 is screw coupled to the supporting member 114.
  • the variable diffuser 130 has one side having threads formed thereon, and the inserting portion 114a of the supporting member 114 also has threads formed on an inside thereof in conformity therewith. According to this, the variable diffuser 130 moves up or down while rotating in a forward direction or a reverse direction.
  • the variable diffuser 130 has one side with a plurality of pins 132.
  • the pin 132 serves to transmit the rotating power from the worm wheel 160 to the variable diffuser 130.
  • a number of the pins 132 are plural for effective transmission of the rotating power of the worm wheel 160, but the number of the pins 132 is not limited to this, and one or more than one pin 132 may be provided to the one side of the variable diffuser 130.
  • the plurality of pins 132 may be provided to the one side of the variable diffuser 130 in a circumferential direction thereof.
  • a worm 152 is provided to the drive motor 150 of the variable diffuser 130.
  • the worm 152 is engaged with the worm wheel 160 to rotate the worm wheel 160 as the drive motor 150 is operated.
  • the worm wheel 160 is positioned to face the one side of the variable diffuser 130, and provided with a plurality of inserting holes 162 for inserting the pins 132 of the variable diffuser 130 therein, respectively.
  • variable diffuser 130 since the pins 132 of the variable diffuser 130 are in the inserting holes 162 of the worm wheel 160, the drive motor 150 rotates the variable diffuser 130 together with the worm wheel 160. Therefore, as the variable diffuser 130 screw coupled to the supporting member 114 is moved up/down while rotating by the drive motor 150, opening of the flow passage P can be regulated.
  • the present invention can make precise regulation of the opening of the flow passage according to the rotation of the drive motor 150 by using the worm 152 and the worm wheel 160 as a power transmission member from the driving motor 150, in which the worm wheel 160 is made to rotate in one body with the variable diffuser 130 and the variable diffuser 130 is made to move up/down to regulate the opening of the flow passage P.
  • a number of rotation of the worm wheel 160 is smaller than a number of rotation of the drive motor 150.
  • a rotation angle of the worm wheel 160 can be regulated within a small range precisely by rotating the drive motor 150.
  • a low priced motor or a small sized motor may be used.
  • variable diffuser 130 screw coupled thus moves up/down while the worm wheel 160 and the variable diffuser 130 rotate in one body, a mechanism of transmission of the rotating power from the drive motor 150 is simple. That is, if it is known that a number of rotation of the worm wheel according to a number of rotation of the drive motor 150, and a distance of the up/down movement of the variable diffuser 130 according to a number of rotation of the worm wheel 160, the opening of the flow passage P of the variable diffuser 130 can be regulated by controlling the drive motor 150.
  • a reduction ratio of the worm 152 to the worm wheel 160 may be over 50:1. If the reduction ratio of the worm 152 to the worm wheel 160 is over 50:1, an error of moved distance of the variable diffuser 130 caused by backlash of the worm 152 and the worm wheel 160 is within 1% of a total distance of the up/down movement, which is negligible.
  • the pins 132 of the variable diffuser 130 move up/down within the inserting holes 162 in the worm wheel 160 by the up/down movement of the variable diffuser 130. Therefore, the pin 132 of the variable diffuser 130 is designed to have a diameter with a cross sectional area smaller than a cross sectional area of the inserting hole 162 of the worm wheel 160 so that the pin 132 can move up/down in the inserting hole 162.
  • the pin 132 has a length L longer than a distance H of the up/down movement of the variable diffuser 130.
  • the distance H of the up/down movement means a distance forming a largest space between the variable diffuser 130 and the supporting member 114. Therefore, even in a state the variable diffuser 130 is spaced a largest distance from the supporting member 114 as the variable diffuser 130 moves up, since the pin 132 is kept inserted in the inserting hole 162 in the worm wheel 160, the variable diffuser 130 can rotate in one body with the worm wheel 160.
  • a centrifugal compressor may include a case, an impeller for accelerating refrigerant introduced to an inside of the case, a variable diffuser on a flow passage of the refrigerant for regulating opening of the flow passage, a rotating member to rotate the variable diffuser and a drive motor for providing rotating power to the rotating member, wherein the variable diffuser is mounted movably to the rotating member in up/down direction and the variable diffuser is screw coupled to an inside of the case to regulate the opening of the flow passage as the variable diffuser moves up/down by rotation.
  • the rotating member may have a helix formed on a side thereof, and the drive motor may have a gear engaged with the side of the rotating member.
  • the rotating member may be a worm wheel and the gear may be a worm.
  • variable diffuser may have a side with a plurality of pins, and the rotating member may have a plurality of inserting holes for inserting the plurality of pins therein, respectively.
  • the rotating member may have a side with a plurality of pins, and the variable diffuser may have a plurality of inserting holes for inserting the plurality of pins therein, respectively.
  • the plurality of pins may be configured to rotate in one body with the rotating member, and be configured to move up/down within the inserting hole following moving up/down of the variable diffuser.
  • the rotation member may have a rotation direction perpendicular to the rotation direction of the drive motor.
  • the drive motor may be a step motor.
  • a centrifugal compressor may include a case, an impeller for accelerating refrigerant introduced to an inside of the case, a variable diffuser provided on a flow passage of the refrigerant to have a plurality of pins on one side thereof, a worm wheel positioned to face the one side of the variable diffuser, the worm wheel has a plurality of inserting holes for inserting the pins therein, respectively and a drive motor having a worm engaged with the worm wheel.
  • the variable diffuser may be screw coupled to an inside of the case to regulate opening of the flow passage as the variable diffuser moves up/down by rotation.
  • the plurality of pins may be configured to rotate in one body with the worm wheel, and be configured to move up/down within the inserting hole following moving up/down of the variable diffuser.
  • the plurality of pins may have a length longer than a moving up/down distance of the variable diffuser.
  • Between the worm and the worm wheel may be a reduction ratio of over 50:1.
  • variable diffuser may have a shape of a ring which surrounds an outside circumference of the impeller.
  • the case may include a shroud having a refrigerant inlet formed therein, and a supporting member arranged spaced from the shroud to form a space for housing the impeller and forming a flow passage of compressed refrigerant on an outside circumference of the impeller.
  • the supporting member may have a ring shaped inserting portion screw coupled to the variable diffuser.
  • centrifugal compressor As embodied and broadly described herein, a method for operating a centrifugal compressor according to any of the preceding centrifugal compressors is available.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP12185119.0A 2012-02-09 2012-09-20 Radialverdichter Active EP2626573B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120013287A KR101342383B1 (ko) 2012-02-09 2012-02-09 원심 압축기

Publications (2)

Publication Number Publication Date
EP2626573A1 true EP2626573A1 (de) 2013-08-14
EP2626573B1 EP2626573B1 (de) 2020-02-26

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EP (1) EP2626573B1 (de)
KR (1) KR101342383B1 (de)
CN (1) CN103244441B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040562A4 (de) * 2013-08-26 2016-09-14 Gree Electric Appliances Inc Reglerstruktur und zentrifugalverdichter
EP3073124A4 (de) * 2013-11-18 2017-07-26 Gree Electric Appliances, Inc. of Zhuhai Zentrifugalverdichter und zentrifugalwasserkühleinheit
WO2019084572A1 (en) * 2017-10-25 2019-05-02 Flowserve Management Company MULTI-STAGE, MULTI-STAGE, MONOBLOC WATERPROOF PUMP, MODULAR, INTEGRALLY COOLED ENGINE AND ROTOR SPEED CONTROL INDEPENDENTLY
CN110043507A (zh) * 2019-05-23 2019-07-23 萨震压缩机（上海）有限公司 一种节能离心叶轮
US10753369B2 (en) 2018-05-11 2020-08-25 Rolls-Royce Corporation Variable diffuser having a respective penny for each vane
US10753370B2 (en) 2017-05-23 2020-08-25 Rolls-Royce Corporation Variable diffuser with axially translating end wall for a centrifugal compressor
US10883379B2 (en) 2018-05-11 2021-01-05 Rolls-Royce Corporation Variable diffuser having a respective penny for each vane
WO2021055879A1 (en) * 2019-09-18 2021-03-25 Massachusetts Institute Of Technology Adaptive volutes for centrifugal pumps
CN112814946A (zh) * 2019-11-18 2021-05-18 珠海格力电器股份有限公司 扩压器及电机
US11323003B2 (en) 2017-10-25 2022-05-03 Flowserve Management Company Compact, modular, pump or turbine with integral modular motor or generator and coaxial fluid flow

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Publication number Priority date Publication date Assignee Title
KR102267751B1 (ko) * 2017-06-26 2021-06-23 엘지전자 주식회사 압축기 및 이를 포함하는 칠러시스템

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US2431398A (en) * 1944-08-22 1947-11-25 United Aircraft Corp Supercharger with controllable inlet
US3588270A (en) * 1968-08-20 1971-06-28 Escher Wyss Ltd Diffuser for a centrifugal fluid-flow turbomachine
US4544325A (en) * 1980-10-22 1985-10-01 Teledyne Industries, Inc. Variable geometry device for turbine compressor outlet
US4932835A (en) * 1989-04-04 1990-06-12 Dresser-Rand Company Variable vane height diffuser
WO2005017321A1 (en) * 2003-08-14 2005-02-24 Honeywell International Inc. Variable diffuser with movable wall
DE102008059462A1 (de) * 2007-12-03 2009-06-04 Tcg Unitech Systemtechnik Gmbh Radialpumpe

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US2285976A (en) * 1940-01-15 1942-06-09 Gen Electric Centrifugal compressor
US2431398A (en) * 1944-08-22 1947-11-25 United Aircraft Corp Supercharger with controllable inlet
US3588270A (en) * 1968-08-20 1971-06-28 Escher Wyss Ltd Diffuser for a centrifugal fluid-flow turbomachine
US4544325A (en) * 1980-10-22 1985-10-01 Teledyne Industries, Inc. Variable geometry device for turbine compressor outlet
US4932835A (en) * 1989-04-04 1990-06-12 Dresser-Rand Company Variable vane height diffuser
WO2005017321A1 (en) * 2003-08-14 2005-02-24 Honeywell International Inc. Variable diffuser with movable wall
DE102008059462A1 (de) * 2007-12-03 2009-06-04 Tcg Unitech Systemtechnik Gmbh Radialpumpe

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3040562A4 (de) * 2013-08-26 2016-09-14 Gree Electric Appliances Inc Reglerstruktur und zentrifugalverdichter
JP2016528441A (ja) * 2013-08-26 2016-09-15 グリー エレクトリック アプライアンシズ，インコーポレイテッド オブ ヂューハイ 調整器アセンブリおよび遠心圧縮機
EP3073124A4 (de) * 2013-11-18 2017-07-26 Gree Electric Appliances, Inc. of Zhuhai Zentrifugalverdichter und zentrifugalwasserkühleinheit
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CN103244441B (zh) 2016-09-21
CN103244441A (zh) 2013-08-14
EP2626573B1 (de) 2020-02-26
KR101342383B1 (ko) 2013-12-16

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