US3440969A - Impeller having a centrifugal fluid handling means having steadily curving vanes - Google Patents

Impeller having a centrifugal fluid handling means having steadily curving vanes Download PDF

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Publication number
US3440969A
US3440969A US738275A US3440969DA US3440969A US 3440969 A US3440969 A US 3440969A US 738275 A US738275 A US 738275A US 3440969D A US3440969D A US 3440969DA US 3440969 A US3440969 A US 3440969A
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Prior art keywords
vane
angle
impeller
equation
fluid
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Expired - Lifetime
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US738275A
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English (en)
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Masukichi Kondo
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    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F01D5/043—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
    • F01D5/048—Form or construction
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49329—Centrifugal blower or fan

Definitions

  • a velocity triangle Composed of oints of Y and Y AY in radius.
  • the vane angle decreases or increases steadily at a uniform rate from the point of origin of the vane to the outer periphery.
  • This invention relates to a vane for an impeller for a pump, such as a centrifugal pump, a centrifugal blower, or the like, and for a centrifugal fluid driven device, such as a water turbine, a torque convertor, or the like.
  • a pump such as a centrifugal pump, a centrifugal blower, or the like
  • a centrifugal fluid driven device such as a water turbine, a torque convertor, or the like.
  • the main factors which regulate the value a are radial acceleration dv /dr and the progressive change dfi/dr of the vane angle ,6 along the vane.
  • FIG. 1 is a diagram showing the relationship between the relative and absolute path of a fluid in an impeller
  • FIG. 2 is a diagram of a velocity triangle showing the velocity relationships in the impeller
  • FIGS. 3A and 3B are diagrams of velocity triangles at poirlits r and r-l-dr of the radius of the impeller, respective y;
  • FIG. 4A is a diagram showing the defects of a single arc vane where the outlet angle 5 is larger than the inlet angle [31;
  • FIG. 4B is a diagram similar to that of FIG. 4A where inlet angle ,8 is greater than outlet angle (3
  • FIG. 5 is a diagram showing the defects of a vane composed of two arcs where ,8 fi
  • FIG. 7 is a diagram showing the radius of curvature of a vane
  • FIG. 8 is a diagram illustrating the differences between the arc vanes and the vane according to the present invention where ⁇ 3 B
  • FIG. 9 is a diagram similar to FIG. 8 where ⁇ 3 fl
  • FIG. 10 is a diagram showing the differences between a vane based upon successive calculations, as used in connection with FIG. 6, and a vane according to the present invention.
  • FIG. 11 is a diagram showing the differences between vane profiles according to the present invention where 51 l 2 and I 1 B2- DEFINITIONS Throughout the specification and claims the following terms will have the meanings as set forth. Reference is made to FIGS. 1 and 2 for the vector and locations of the points at which the various measurements or vectors are located.
  • the energy transmitted is proportional to the circumferential acceleration a of the fluid.
  • FIG. 2 is decreased, and no is increased correspondingly.
  • Equation 5 is a new theoretical equation according to the invention.
  • Equation 6 The value a, can thus be calculated by this theoretical equation.
  • the equation with values p and dv/dt is made equal to an equation which can be numerically solved bv making Equation 6 equal to Equation 5.
  • the next problem to be solved is to establish a method of forming the vane in which the vane angle is steadilv increased or steadily decreased at a uniform rate.
  • FIGS. 4A and 4B Single arc vanes in which the vane has ti fl and B B are shown in FIGS. 4A and 4B, respectively.
  • the central angle between the center 0 of the impeller axis and the center 0' of the arc is equal to vane-angle 3.
  • a steady increase or decrease of the angle 9 does not occur, as is clearly shown in FIGS. 4A or 4B.
  • FIG. 6 A component in the circumferential direction along a minute distance As on the vane is r A and a component in the radial direction is Ar.
  • the points I), c and d in FIG. 6 are determined successively by calculating Ar for every central angle A0 by means of the equation:
  • Equation 8 is correct only for the mean position of the points x and x-l-l.
  • the correct equation is as follows:
  • Equation 8' fl and r in Equation 8' are numerical values which can be determined only after calculation is made, and are unknown value. Equation 8' therefore is an equation which is impossible to solve numerically.
  • the value p is proportional to the product of the radius and sec B. Since radius r and vane-angle B at each point on the vane are different respectively, the radium of curvature p differs at each adjacent point on the vane, and increases or decreases gradually.
  • the angle formed by line r and line p is equal to the angle ,8 (see FIG. 7).
  • the angle B at each adjacent point on the vane is different from the angle at an adjacent point, as shown by the Equation 9-A or 9B.
  • the center point of the radius of curvature for each point of the vane is thus different from that for the adjacent point and changes regularly.
  • FIG. 8 the profiles of the vane shown in FIGS. 4A and 5 are shown in dotted lines for comparison.
  • the value r determined by the successive calculation method is smaller with a gradual increase of the angle [3 then the values corresponding to r when the vane-profile according to the present invention has a gradual increase of the angle [3.
  • 0 the central angle between the origin of the vane at one of said peripheries and a point x along the vane;
  • B the vane-angle at said point x;
  • B the vane-angle at the origin of the vane; and
  • ms 0/fi fl References Cited UNITED STATES PATENTS 1,509,653 9/1924 Kaplan 103-115 963,378 7/1910 Lorenz 1031 15 1,906,180 4/1933 Rees 103-115 909,863 1/1909 Bowie 230--127 2,767,906 10/1956 Doyle 230134.45 3,226,085 12/1965 Bachl 1031 15 FOREIGN PATENTS 1,324 1863 Great Britain.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Rotary Pumps (AREA)
US738275A 1965-03-03 1968-06-19 Impeller having a centrifugal fluid handling means having steadily curving vanes Expired - Lifetime US3440969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1226865 1965-03-03

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US (1) US3440969A (fr)
CH (1) CH519109A (fr)
DE (1) DE1528730B2 (fr)
GB (1) GB1144445A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964841A (en) * 1974-09-18 1976-06-22 Sigma Lutin, Narodni Podnik Impeller blades
US4218190A (en) * 1977-06-29 1980-08-19 Kawasaki Jukogyo Kabushiki Kaisha Flat-bladed fan wheel of diagonal-flow fan
US4566166A (en) * 1984-10-03 1986-01-28 Allis-Chalmers Corporation Method for manufacturing a stay ring bearing stationary guide vanes for a nongated turbine
US20050249594A1 (en) * 2004-05-05 2005-11-10 Chandraker A L Runner blade for low specific speed Francis turbine
CN102628450A (zh) * 2012-01-16 2012-08-08 兰州理工大学 一种无过载离心泵叶轮设计方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03164600A (ja) * 1989-11-22 1991-07-16 Atsugi Unisia Corp ポンプのインペラ構造
US5685696A (en) * 1994-06-10 1997-11-11 Ebara Corporation Centrifugal or mixed flow turbomachines
JP3599390B2 (ja) * 1994-11-04 2004-12-08 日本メクトロン株式会社 パーフルオロ不飽和ニトリル化合物およびその製造法
ITMI20012413A1 (it) * 2001-11-15 2003-05-15 Nuovo Pignone Spa Pala per girante di compressore centrifygo a medio coefficiente di flusso
ITMI20012414A1 (it) * 2001-11-15 2003-05-15 Nuovo Pignone Spa Pala per girante di compressore centrifugo a medio-alto coefficiente di flusso
CN110145489B (zh) * 2019-05-22 2020-11-24 佛山市南海南洋电机电器有限公司 一种风机叶片及风机叶轮

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US909863A (en) * 1905-06-03 1909-01-19 Augustus J Bowie Jr Centrifugal fan.
US963378A (en) * 1905-09-23 1910-07-05 Hans Lorenz Turbine or centrifugal pump.
US1509653A (en) * 1921-09-01 1924-09-23 Kaplan Victor Runner wheel for turbines, etc.
US1906180A (en) * 1928-10-05 1933-04-25 Rees Edmund Scott Gustave Propeller, pump, or fan
US2767906A (en) * 1952-11-07 1956-10-23 Doyle Vacuum Cleaner Co Centrifugal fan wheel
US3226085A (en) * 1962-10-01 1965-12-28 Bachl Herbert Rotary turbine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US909863A (en) * 1905-06-03 1909-01-19 Augustus J Bowie Jr Centrifugal fan.
US963378A (en) * 1905-09-23 1910-07-05 Hans Lorenz Turbine or centrifugal pump.
US1509653A (en) * 1921-09-01 1924-09-23 Kaplan Victor Runner wheel for turbines, etc.
US1906180A (en) * 1928-10-05 1933-04-25 Rees Edmund Scott Gustave Propeller, pump, or fan
US2767906A (en) * 1952-11-07 1956-10-23 Doyle Vacuum Cleaner Co Centrifugal fan wheel
US3226085A (en) * 1962-10-01 1965-12-28 Bachl Herbert Rotary turbine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964841A (en) * 1974-09-18 1976-06-22 Sigma Lutin, Narodni Podnik Impeller blades
US4218190A (en) * 1977-06-29 1980-08-19 Kawasaki Jukogyo Kabushiki Kaisha Flat-bladed fan wheel of diagonal-flow fan
US4566166A (en) * 1984-10-03 1986-01-28 Allis-Chalmers Corporation Method for manufacturing a stay ring bearing stationary guide vanes for a nongated turbine
US20050249594A1 (en) * 2004-05-05 2005-11-10 Chandraker A L Runner blade for low specific speed Francis turbine
US7210904B2 (en) * 2004-05-05 2007-05-01 Bharat Heavy Electricals Ltd. Runner blade for low specific speed Francis turbine
CN102628450A (zh) * 2012-01-16 2012-08-08 兰州理工大学 一种无过载离心泵叶轮设计方法
CN102628450B (zh) * 2012-01-16 2014-07-23 兰州理工大学 一种无过载离心泵叶轮设计方法

Also Published As

Publication number Publication date
DE1528730B2 (de) 1975-06-26
CH519109A (fr) 1972-02-15
GB1144445A (en) 1969-03-05
DE1528730A1 (de) 1969-12-04

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