US20120034078A1 - Impeller and centrifugal compressor including the same - Google Patents
Impeller and centrifugal compressor including the same Download PDFInfo
- Publication number
- US20120034078A1 US20120034078A1 US13/080,965 US201113080965A US2012034078A1 US 20120034078 A1 US20120034078 A1 US 20120034078A1 US 201113080965 A US201113080965 A US 201113080965A US 2012034078 A1 US2012034078 A1 US 2012034078A1
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- Prior art keywords
- blade
- impeller
- hub
- centrifugal compressor
- outlet
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Classifications
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
-
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
Definitions
- This disclosure relates to a centrifugal compressor, and more particularly, to an impeller which adds velocity energy to a compressible medium while rotating at high speed.
- a compressor is a device for compressing gas by applying mechanical energy and is necessary for an air-conditioning apparatus such as a refrigerator to compress a cooling medium.
- compressors including a reciprocating compressor, a screw compressor, a centrifugal compressor, and the like.
- the centrifugal compressor rotating at high speed has been widely used since fluctuation of a discharge gas does not occur and reductions in size and weight are easily achieved.
- a centrifugal compressor used in a freezer includes a casing having a cooling medium inlet port on one side, an impeller which is provided inside the casing for compressing a cooling medium flowing therein, a diffuser for converting kinetic energy of the cooling medium compressed by the impeller into pressure energy, and a volute for transferring the cooling medium passing through the diffuser to a discharge duct.
- the cooling medium flowing through the cooling medium inlet port of the centrifugal compressor is compressed by the impeller and the diffuser, passes through the volute and the discharge duct, and then is transferred to a condenser.
- the impeller which may be considered as the heart of the centrifugal compressor includes a number of blades and applies centrifugal force to the compressible medium (the cooling medium) by rotating at high speed. Thus, there is a problem in that noise occurs.
- This disclosure provides an impeller which has an optimal structure to minimize noise and a centrifugal compressor including the same.
- an impeller of a centrifugal compressor including: a hub fixed to a rotation shaft; and a plurality of blades extending outward from a center portion of the hub on one surface of the hub, wherein a length of the blade is greater than a straight length between an inlet end of the blade and an outlet end thereof.
- the outlet angle ⁇ may be in a range of 20° to 70°.
- the inclination angle ⁇ may be in a range of 40° to 90°.
- a centrifugal compressor including: an impeller which is fixed to a rotation shaft to be rotated at high speed; and a diffuser which converts kinetic energy of a compressible medium that is increased by the impeller into pressure energy, wherein the impeller satisfies Equation (1).
- FIG. 1 is a cross-sectional view illustrating a centrifugal compressor according to an embodiment
- FIG. 2 is a perspective view of an impeller according to an embodiment
- FIG. 3 is a front view of the impeller for illustrating an outlet angle of a blade
- FIG. 4 is a partial side view of the impeller for illustrating an inclination angle of the blade
- FIG. 5 is a graph showing a change in noise level depending on a value of sin( ⁇ 20)°+cos( ⁇ 40°) in regard to the outlet angle ⁇ and the inclination angle ⁇ of the blade;
- FIG. 6 is a graph showing a change in noise level depending on the outlet angle of the blade.
- FIG. 7 is a graph showing a change in noise level depending on the inclination angle of the blade.
- FIG. 1 is a cross-sectional view illustrating a centrifugal compressor according to an embodiment.
- FIG. 2 is a perspective view of an impeller according to an embodiment.
- FIG. 3 is a front view of the impeller for illustrating an outlet angle of a blade.
- FIG. 4 is a partial side view of the impeller for illustrating an inclination angle of the blade.
- FIG. 5 is a graph showing a change in noise level depending on a value of sin( ⁇ 20°)+cos( ⁇ 40°) in regard to the outlet angle ⁇ and the inclination angle ⁇ of the blade.
- the centrifugal compressor 100 includes a casing 10 , a rotation shaft 20 which penetrates the center of the casing 10 to be connected to a motor, an impeller 30 which is fixed to the rotation shaft 20 to be rotated so as to cause a compressible medium such as a cooing medium to flow therein, and a diffuser 40 which is disposed at a predetermined interval from the impeller 30 to convert kinetic energy of the compressible medium into pressure energy.
- an inlet port 12 Through one side of the casing 10 , there is provided an inlet port 12 through which the compressible medium flows and which is disposed in a longitudinal direction of the rotation shaft 20 .
- An inlet guide vane (IGV) 50 for controlling an inflow of the cooling medium is provided in the inlet port 12 .
- a bearing member 60 for supporting the rotation shaft 20 is provided on the rear of the impeller 30 .
- the cooling medium compressed by the impeller 30 and the diffuser 40 is directed to the discharge duct through the volute 70 .
- the impeller 30 includes, as illustrated in FIG. 2 , a hub 32 which is directly fixed to the rotation shaft 20 , and blades 34 which protrude from one surface of the hub 32 for inducing a flow of the cooling medium.
- the hub 32 may have various shapes such as a disk shape or a columnar shape having a width increasing in an axial direction in which the cooling medium flows.
- a plurality of the blades 34 extend outward from the center portion of the hub 32 in a radial direction at predetermined intervals.
- Each blade 34 may extend in a streamline shape, and accordingly, an actual length (curve length) of the blade 34 may be greater than a straight length between an inlet end 342 and an outlet end 344 of the blade 34 .
- the shape of the blade 34 has a great effect on the flow of the cooling medium.
- the outlet angle ⁇ and the inclination angle ⁇ of the blade 34 are factors having a great effect on generation of noise due to the flow of the cooling medium.
- the outlet angle ⁇ of the blade 34 refers to an angle between a longitudinal direction (tangential direction) of the blade 34 and a tangential direction of the hub 32 at a point where the outlet end 344 of the blade 34 meets an outermost portion of the hub 32 .
- the inclination angle ⁇ refers to an angle between a height direction of the blade 34 and a tangential direction of the one surface of the hub 32 at the outlet end 344 of the blade 34 .
- the impeller 30 of the centrifugal compressor 100 satisfies Equation (1) in regard to the outlet angle ⁇ and the inclination angle ⁇ of the blade 34 .
- the noise generation is reduced when the value of sin( ⁇ 20 °)+cos( ⁇ 40°) is in the range of 1 to 1.5.
- FIG. 6 is a graph showing a change in noise level depending on the outlet angle of the blade.
- FIG. 7 is a graph showing a change in noise level depending on the inclination angle of the blade.
- the outlet angle ⁇ of the blade 34 when the outlet angle ⁇ of the blade 34 approaches 90°, pressure at the outlet end 344 of the blade 34 is increased, and thus the level of noise (blade-passing frequency (BPF) noise) is very high.
- BPF blade-passing frequency
- the noise level is sharply reduced when the outlet angle ⁇ is 70° and is maintained at a predetermined level.
- the outlet angle ⁇ when the outlet angle ⁇ is smaller than 20°, a difference in speed between the cooling medium flowing along the outer surface of the blade 34 and the cooling medium flowing along the inner surface thereof increases rapidly at the outlet end 344 of the blade 34 , and thus the noise level is increased again. Therefore, in the centrifugal compressor 100 according to the embodiment, the outlet angle ⁇ may have a value in the range of 20° to 70°.
- the noise level is maintained at a predetermined level or a smaller level when the inclination angle ⁇ of the blade 34 is in the range of 40° to 90°.
- the inclination angle ⁇ may have a value in the range of 40° to 90°.
- the centrifugal compressor according to the present disclosure includes the impeller which has an optimal shape based on the outlet angle and the inclination angle, so that there are advantages of high reliability in designing and a reduction in noise of the centrifugal compressor.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Provided is an impeller of a centrifugal compressor including: a hub fixed to a rotation shaft; and a plurality of blades extending outward from a center portion of the hub on one surface of the hub, wherein a length of the blade is greater than a straight length between an inlet end of the blade and an outlet end thereof. Assuming that an outlet angle formed along a longitudinal direction of the blade at the outlet end of the blade is β and an inclination angle of the blade from the one surface of the hub at the outlet end of the blade is γ, the following equation is satisfied: 1<sin(β−20°)+cos(γ−40°)<1.5.
Description
- This application claims priority to Korean Patent Application No. 10-2010-0076399, filed on Aug. 9, 2010, and all the benefits accruing therefrom under 35 U.S.C. §119, the contents of which in its entirety are herein incorporated by reference.
- 1. Field
- This disclosure relates to a centrifugal compressor, and more particularly, to an impeller which adds velocity energy to a compressible medium while rotating at high speed.
- 2. Description of the Related Art
- A compressor is a device for compressing gas by applying mechanical energy and is necessary for an air-conditioning apparatus such as a refrigerator to compress a cooling medium. There are different kinds of compressors, including a reciprocating compressor, a screw compressor, a centrifugal compressor, and the like. Particularly, the centrifugal compressor rotating at high speed has been widely used since fluctuation of a discharge gas does not occur and reductions in size and weight are easily achieved.
- In general, a centrifugal compressor used in a freezer includes a casing having a cooling medium inlet port on one side, an impeller which is provided inside the casing for compressing a cooling medium flowing therein, a diffuser for converting kinetic energy of the cooling medium compressed by the impeller into pressure energy, and a volute for transferring the cooling medium passing through the diffuser to a discharge duct. The cooling medium flowing through the cooling medium inlet port of the centrifugal compressor is compressed by the impeller and the diffuser, passes through the volute and the discharge duct, and then is transferred to a condenser.
- The impeller which may be considered as the heart of the centrifugal compressor includes a number of blades and applies centrifugal force to the compressible medium (the cooling medium) by rotating at high speed. Thus, there is a problem in that noise occurs.
- This disclosure provides an impeller which has an optimal structure to minimize noise and a centrifugal compressor including the same.
- In one aspect, there is provided an impeller of a centrifugal compressor including: a hub fixed to a rotation shaft; and a plurality of blades extending outward from a center portion of the hub on one surface of the hub, wherein a length of the blade is greater than a straight length between an inlet end of the blade and an outlet end thereof. Assuming that an outlet angle formed along a longitudinal direction of the blade at the outlet end of the blade is β and an inclination angle of the blade from the one surface of the hub at the outlet end of the blade is γ, Equation (1) is satisfied:
-
1<sin(β−20°)+cos(γ−40°)<1.5 (1) - The outlet angle β may be in a range of 20° to 70°.
- The inclination angle γ may be in a range of 40° to 90°.
- In another aspect, there is provided a centrifugal compressor including: an impeller which is fixed to a rotation shaft to be rotated at high speed; and a diffuser which converts kinetic energy of a compressible medium that is increased by the impeller into pressure energy, wherein the impeller satisfies Equation (1).
- The above and other aspects, features and advantages of the disclosed exemplary embodiments will be more apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
-
FIG. 1 is a cross-sectional view illustrating a centrifugal compressor according to an embodiment; -
FIG. 2 is a perspective view of an impeller according to an embodiment; -
FIG. 3 is a front view of the impeller for illustrating an outlet angle of a blade; -
FIG. 4 is a partial side view of the impeller for illustrating an inclination angle of the blade; -
FIG. 5 is a graph showing a change in noise level depending on a value of sin(β−20)°+cos(γ−40°) in regard to the outlet angle β and the inclination angle γ of the blade; -
FIG. 6 is a graph showing a change in noise level depending on the outlet angle of the blade; and -
FIG. 7 is a graph showing a change in noise level depending on the inclination angle of the blade. - Exemplary embodiments now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth therein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. In the description, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments.
- The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the use of the terms a, an, etc. does not denote a limitation of quantity, but rather denotes the presence of at least one of the referenced item. It will be further understood that the terms “comprises” and/or “comprising”, or “includes” and/or “including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
- Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
- In the drawings, like reference numerals in the drawings denote like elements. The shape, size and regions, and the like, of the drawing may be exaggerated for clarity.
- Hereinafter, a centrifugal compressor according to an embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.
-
FIG. 1 is a cross-sectional view illustrating a centrifugal compressor according to an embodiment.FIG. 2 is a perspective view of an impeller according to an embodiment.FIG. 3 is a front view of the impeller for illustrating an outlet angle of a blade.FIG. 4 is a partial side view of the impeller for illustrating an inclination angle of the blade. And,FIG. 5 is a graph showing a change in noise level depending on a value of sin(β−20°)+cos(γ−40°) in regard to the outlet angle δ and the inclination angle γ of the blade. - Referring to
FIG. 1 , thecentrifugal compressor 100 according to an embodiment includes acasing 10, arotation shaft 20 which penetrates the center of thecasing 10 to be connected to a motor, animpeller 30 which is fixed to therotation shaft 20 to be rotated so as to cause a compressible medium such as a cooing medium to flow therein, and adiffuser 40 which is disposed at a predetermined interval from theimpeller 30 to convert kinetic energy of the compressible medium into pressure energy. - On one side of the
casing 10, there is provided aninlet port 12 through which the compressible medium flows and which is disposed in a longitudinal direction of therotation shaft 20. An inlet guide vane (IGV) 50 for controlling an inflow of the cooling medium is provided in theinlet port 12. Abearing member 60 for supporting therotation shaft 20 is provided on the rear of theimpeller 30. - The cooling medium compressed by the
impeller 30 and thediffuser 40 is directed to the discharge duct through thevolute 70. - In the
centrifugal compressor 100 having the above-described configuration, theimpeller 30 includes, as illustrated inFIG. 2 , ahub 32 which is directly fixed to therotation shaft 20, andblades 34 which protrude from one surface of thehub 32 for inducing a flow of the cooling medium. Thehub 32 may have various shapes such as a disk shape or a columnar shape having a width increasing in an axial direction in which the cooling medium flows. - A plurality of the
blades 34 extend outward from the center portion of thehub 32 in a radial direction at predetermined intervals. Eachblade 34 may extend in a streamline shape, and accordingly, an actual length (curve length) of theblade 34 may be greater than a straight length between aninlet end 342 and anoutlet end 344 of theblade 34. - The shape of the
blade 34 has a great effect on the flow of the cooling medium. Particularly, the outlet angle β and the inclination angle γ of theblade 34 are factors having a great effect on generation of noise due to the flow of the cooling medium. - As illustrated in
FIG. 3 , the outlet angle β of theblade 34 refers to an angle between a longitudinal direction (tangential direction) of theblade 34 and a tangential direction of thehub 32 at a point where the outlet end 344 of theblade 34 meets an outermost portion of thehub 32. As illustrated inFIG. 4 , the inclination angle γ refers to an angle between a height direction of theblade 34 and a tangential direction of the one surface of thehub 32 at theoutlet end 344 of theblade 34. - The
impeller 30 of thecentrifugal compressor 100 according to an embodiment satisfies Equation (1) in regard to the outlet angle β and the inclination angle γ of theblade 34. -
1<sin(β−20°)+cos(γ−40°)<1.5 (1) - The applicant discovered that noise generation by the
impeller 30 is minimized when the outlet angle β and the inclination angle γ of theblade 34 satisfy Equation (1). - As illustrated in
FIG. 5 , in regard to the outlet angle β and the inclination angle γ of theblade 34, the noise generation is reduced when the value of sin(β−20°)+cos(γ−40°) is in the range of 1 to 1.5. -
FIG. 6 is a graph showing a change in noise level depending on the outlet angle of the blade.FIG. 7 is a graph showing a change in noise level depending on the inclination angle of the blade. - Referring to
FIG. 6 , when the outlet angle β of theblade 34 approaches 90°, pressure at theoutlet end 344 of theblade 34 is increased, and thus the level of noise (blade-passing frequency (BPF) noise) is very high. However, the noise level is sharply reduced when the outlet angle β is 70° and is maintained at a predetermined level. Meanwhile, when the outlet angle β is smaller than 20°, a difference in speed between the cooling medium flowing along the outer surface of theblade 34 and the cooling medium flowing along the inner surface thereof increases rapidly at theoutlet end 344 of theblade 34, and thus the noise level is increased again. Therefore, in thecentrifugal compressor 100 according to the embodiment, the outlet angle β may have a value in the range of 20° to 70°. - Referring to
FIG. 7 , the noise level is maintained at a predetermined level or a smaller level when the inclination angle γ of theblade 34 is in the range of 40° to 90°. However, when the inclination angle γ is smaller than 40°, a difference in speed between the cooling medium flowing along the outer surface of theblade 34 and the cooling medium flowing along the inner surface thereof is increased, so that the noise level increases rapidly. Therefore, in thecentrifugal compressor 100 according to the embodiment, the inclination angle γ may have a value in the range of 40° to 90°. - In the foregoing description, a single-stage centrifugal compressor has been described. However, this disclosure is not limited thereto. The number of the stages of the centrifugal compressor may be changed differently.
- The centrifugal compressor according to the present disclosure includes the impeller which has an optimal shape based on the outlet angle and the inclination angle, so that there are advantages of high reliability in designing and a reduction in noise of the centrifugal compressor.
- While the exemplary embodiments have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of this disclosure as defined by the appended claims.
- In addition, many modifications can be made to adapt a particular situation or material to the teachings of this disclosure without departing from the essential scope thereof. Therefore, it is intended that this disclosure not be limited to the particular exemplary embodiments disclosed as the best mode contemplated for carrying out this disclosure, but that this disclosure will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. An impeller of a centrifugal compressor comprising:
a hub fixed to a rotation shaft; and
a plurality of blades extending outward from a center portion of the hub on one surface of the hub,
wherein a length of the blade is greater than a straight length between an inlet end of the blade and an outlet end thereof, and
assuming that an outlet angle formed along a longitudinal direction of the blade at the outlet end of the blade is β and an inclination angle of the blade from the one surface of the hub at the outlet end of the blade is γ, the following equation is satisfied:
1<sin(β−20°)+cos(γ−40°)<1.5.
1<sin(β−20°)+cos(γ−40°)<1.5.
2. The impeller according to claim 1 , wherein the outlet angle is in a range of 20° to 70°.
3. The impeller according to claim 1 , wherein the inclination angle is in a range of 40° to 90°.
4. A centrifugal compressor comprising:
an impeller which is fixed to a rotation shaft to be rotated at high speed; and
a diffuser which converts kinetic energy of a compressible medium that is increased by the impeller into pressure energy,
wherein the impeller comprises:
a hub fixed to the rotation shaft; and
a plurality of blades extending outward from a center portion of the hub on one surface of the hub,
a length of the blade is greater than a straight length between an inlet end of the blade and an outlet end thereof, and
assuming that an outlet angle formed along a longitudinal direction of the blade at the outlet end of the blade is β and an inclination angle of the blade from the one surface of the hub at the outlet end of the blade is γ, the following equation is satisfied:
1<sin(β−20°)+cos(γ−40°)<1.5.
1<sin(β−20°)+cos(γ−40°)<1.5.
5. The centrifugal compressor according to claim 4 , wherein the outlet angle is in a range of 20° to 70°.
6. The centrifugal compressor according to claim 4 , wherein the inclination angle is in a range of 40° to 90°.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2010-0076399 | 2010-08-09 | ||
KR1020100076399A KR101270899B1 (en) | 2010-08-09 | 2010-08-09 | Impeller and centrifugal compressor including the same |
Publications (1)
Publication Number | Publication Date |
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US20120034078A1 true US20120034078A1 (en) | 2012-02-09 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/080,965 Abandoned US20120034078A1 (en) | 2010-08-09 | 2011-04-06 | Impeller and centrifugal compressor including the same |
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KR (1) | KR101270899B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103498818A (en) * | 2013-09-06 | 2014-01-08 | 乐金空调(山东)有限公司 | Silencer of centrifugal compressor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6034162B2 (en) * | 2012-11-30 | 2016-11-30 | 株式会社日立製作所 | Centrifugal fluid machine |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964840A (en) * | 1974-01-11 | 1976-06-22 | Eduard Kamelmacher | Blade for a centrifugal pump impeller |
US4167369A (en) * | 1977-04-04 | 1979-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Impeller blading of a centrifugal compressor |
US5145317A (en) * | 1991-08-01 | 1992-09-08 | Carrier Corporation | Centrifugal compressor with high efficiency and wide operating range |
US5313794A (en) * | 1991-06-07 | 1994-05-24 | Aisin Aw Co., Ltd. | Fluid coupling |
US5685696A (en) * | 1994-06-10 | 1997-11-11 | Ebara Corporation | Centrifugal or mixed flow turbomachines |
US6017187A (en) * | 1994-03-19 | 2000-01-25 | Ksb Aktiengesellschaft | Device for reducing noise in centrifugal pumps |
US6250102B1 (en) * | 1998-12-03 | 2001-06-26 | American Standard International Inc. | Oil and refrigerant pump for centrifugal chiller |
US20040105756A1 (en) * | 2002-08-30 | 2004-06-03 | Mitsubishi Heavy Industries, Ltd. | Mixed flow turbine and mixed flow turbine rotor blade |
US20040156717A1 (en) * | 2002-12-02 | 2004-08-12 | Volvo Lastvagnar Ab | Centrifugal pump |
US20050191174A1 (en) * | 2004-02-27 | 2005-09-01 | Ling-Zhong Zeng | Centrifugal fan |
US7146971B2 (en) * | 2003-06-20 | 2006-12-12 | Mokry Peter G | Impeller and a supercharger for an internal combustion engine |
US20070217908A1 (en) * | 2006-03-15 | 2007-09-20 | Denso Corporation | Centrifugal multiblade fan |
US7281898B2 (en) * | 2003-12-30 | 2007-10-16 | Lg Electronics Inc. | Blowing apparatus for refrigerators |
US20090035122A1 (en) * | 2007-08-03 | 2009-02-05 | Manabu Yagi | Centrifugal compressor, impeller and operating method of the same |
US20090092486A1 (en) * | 2005-10-03 | 2009-04-09 | Hirotaka Higashimori | Centrifugal compressing apparatus |
WO2009126066A1 (en) * | 2008-04-08 | 2009-10-15 | Volvo Lastvagnar Ab | Compressor |
US20090297344A1 (en) * | 2008-05-30 | 2009-12-03 | Controlled Power Technologies Limited | Rotors and manufacturing methods for rotors |
US7856834B2 (en) * | 2008-02-20 | 2010-12-28 | Trane International Inc. | Centrifugal compressor assembly and method |
US20110129337A1 (en) * | 2009-11-27 | 2011-06-02 | Wan Ying Juan | Centrifugal pump |
US20120328444A1 (en) * | 2009-12-02 | 2012-12-27 | Mitsubishi Heavy Industries, Ltd. | Impeller of centrifugal compressor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2592950Y2 (en) * | 1993-08-06 | 1999-03-31 | 川崎重工業株式会社 | Splitter type impeller |
JPH10213094A (en) * | 1997-01-31 | 1998-08-11 | Ishikawajima Harima Heavy Ind Co Ltd | Impeller for centrifugal compressor |
JP4946788B2 (en) | 2007-10-23 | 2012-06-06 | 株式会社日立プラントテクノロジー | Pump impeller and pump |
-
2010
- 2010-08-09 KR KR1020100076399A patent/KR101270899B1/en active IP Right Grant
-
2011
- 2011-04-06 US US13/080,965 patent/US20120034078A1/en not_active Abandoned
Patent Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964840A (en) * | 1974-01-11 | 1976-06-22 | Eduard Kamelmacher | Blade for a centrifugal pump impeller |
US4167369A (en) * | 1977-04-04 | 1979-09-11 | Kabushiki Kaisha Komatsu Seisakusho | Impeller blading of a centrifugal compressor |
US5313794A (en) * | 1991-06-07 | 1994-05-24 | Aisin Aw Co., Ltd. | Fluid coupling |
US5145317A (en) * | 1991-08-01 | 1992-09-08 | Carrier Corporation | Centrifugal compressor with high efficiency and wide operating range |
US6017187A (en) * | 1994-03-19 | 2000-01-25 | Ksb Aktiengesellschaft | Device for reducing noise in centrifugal pumps |
US5685696A (en) * | 1994-06-10 | 1997-11-11 | Ebara Corporation | Centrifugal or mixed flow turbomachines |
US6250102B1 (en) * | 1998-12-03 | 2001-06-26 | American Standard International Inc. | Oil and refrigerant pump for centrifugal chiller |
US20040105756A1 (en) * | 2002-08-30 | 2004-06-03 | Mitsubishi Heavy Industries, Ltd. | Mixed flow turbine and mixed flow turbine rotor blade |
US20040156717A1 (en) * | 2002-12-02 | 2004-08-12 | Volvo Lastvagnar Ab | Centrifugal pump |
US7146971B2 (en) * | 2003-06-20 | 2006-12-12 | Mokry Peter G | Impeller and a supercharger for an internal combustion engine |
US7281898B2 (en) * | 2003-12-30 | 2007-10-16 | Lg Electronics Inc. | Blowing apparatus for refrigerators |
US20050191174A1 (en) * | 2004-02-27 | 2005-09-01 | Ling-Zhong Zeng | Centrifugal fan |
US20090092486A1 (en) * | 2005-10-03 | 2009-04-09 | Hirotaka Higashimori | Centrifugal compressing apparatus |
US20070217908A1 (en) * | 2006-03-15 | 2007-09-20 | Denso Corporation | Centrifugal multiblade fan |
US20090035122A1 (en) * | 2007-08-03 | 2009-02-05 | Manabu Yagi | Centrifugal compressor, impeller and operating method of the same |
US7856834B2 (en) * | 2008-02-20 | 2010-12-28 | Trane International Inc. | Centrifugal compressor assembly and method |
WO2009126066A1 (en) * | 2008-04-08 | 2009-10-15 | Volvo Lastvagnar Ab | Compressor |
US20110020152A1 (en) * | 2008-04-08 | 2011-01-27 | Volvo Lastvagnar Ab | Compressor |
US20090297344A1 (en) * | 2008-05-30 | 2009-12-03 | Controlled Power Technologies Limited | Rotors and manufacturing methods for rotors |
US20110129337A1 (en) * | 2009-11-27 | 2011-06-02 | Wan Ying Juan | Centrifugal pump |
US20120328444A1 (en) * | 2009-12-02 | 2012-12-27 | Mitsubishi Heavy Industries, Ltd. | Impeller of centrifugal compressor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103498818A (en) * | 2013-09-06 | 2014-01-08 | 乐金空调(山东)有限公司 | Silencer of centrifugal compressor |
Also Published As
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KR20120014376A (en) | 2012-02-17 |
KR101270899B1 (en) | 2013-06-07 |
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