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 PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- vane
- angle
- impeller
- equation
- fluid
- 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.)
- Expired - Lifetime
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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
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1226865 | 1965-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3440969A true US3440969A (en) | 1969-04-29 |
Family
ID=11800603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US738275A Expired - Lifetime US3440969A (en) | 1965-03-03 | 1968-06-19 | Impeller having a centrifugal fluid handling means having steadily curving vanes |
Country Status (4)
Country | Link |
---|---|
US (1) | US3440969A (de) |
CH (1) | CH519109A (de) |
DE (1) | DE1528730B2 (de) |
GB (1) | GB1144445A (de) |
Cited By (5)
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)
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 |
EP0775248B1 (de) * | 1994-06-10 | 1999-09-15 | Ebara Corporation | Zentrifugal-oder halbaxialturbomaschinen |
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 |
ITMI20012414A1 (it) * | 2001-11-15 | 2003-05-15 | Nuovo Pignone Spa | Pala per girante di compressore centrifugo a medio-alto coefficiente di flusso |
ITMI20012413A1 (it) * | 2001-11-15 | 2003-05-15 | Nuovo Pignone Spa | Pala per girante di compressore centrifygo a medio 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)
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 |
-
1966
- 1966-03-02 CH CH299166A patent/CH519109A/fr not_active IP Right Cessation
- 1966-03-03 DE DE1528730A patent/DE1528730B2/de active Granted
- 1966-03-03 GB GB9459/66A patent/GB1144445A/en not_active Expired
-
1968
- 1968-06-19 US US738275A patent/US3440969A/en not_active Expired - Lifetime
Patent Citations (6)
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)
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 |
---|---|
CH519109A (fr) | 1972-02-15 |
DE1528730A1 (de) | 1969-12-04 |
GB1144445A (en) | 1969-03-05 |
DE1528730B2 (de) | 1975-06-26 |
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