EP2949943A1 - Low turbulence centrifugal pump impeller wherein the downstream part of the blades extends circumferentially - Google Patents

Low turbulence centrifugal pump impeller wherein the downstream part of the blades extends circumferentially Download PDF

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Publication number
EP2949943A1
EP2949943A1 EP15168591.4A EP15168591A EP2949943A1 EP 2949943 A1 EP2949943 A1 EP 2949943A1 EP 15168591 A EP15168591 A EP 15168591A EP 2949943 A1 EP2949943 A1 EP 2949943A1
Authority
EP
European Patent Office
Prior art keywords
base wall
low
plates
blade
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.)
Withdrawn
Application number
EP15168591.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yung-Sho Yang
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2949943A1 publication Critical patent/EP2949943A1/en
Withdrawn legal-status Critical Current

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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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
    • 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
    • F04D29/242—Geometry, shape
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade

Definitions

  • the present invention relates to a pump impeller, especially a low-turbulence impeller for a centrifugal fluid pump.
  • a conventional centrifugal pump impeller 1 has a first base wall 11, a second base wall 12 spaced apart from the first base wall 11, multiple blades 13 mounted between the first base wall 11 and the second base wall 12, and multiple runners 14.
  • the second base wall 12 has an inlet 121 formed in a center of the second base wall 12.
  • the blades 13 are curved and are spaced apart from each other.
  • Each blade 13 has a first blade surface 131 and a second blade surface 132.
  • Each one of the runners 14 is formed between a first blade surface 131 and a second blade surface 132 of two adjacent blades 13 for the flowing of fluid.
  • a width of each blade 13 is constant.
  • a width of each runner 14 is gradually increased from an interior to a periphery of the pump impeller 1.
  • each runner 14 When a motor drives the pump impeller 1 to turn along the direction R by a transmission shaft, the fluid is flowed into the pump impeller through the inlet 121, and then the fluid is flowed out of outlets 140 of the runners 14 by centrifugal forces. Since a width of each runner 14 is gradually increased from the interior to the periphery of the pump impeller 1, each runner 14 has a laminar zone 141 near the first blade surface 131, a turbulent zone 142 near the second blade surface 132, and a transition zone 143 located between the laminar zone 141 and the turbulent zone 142. The laminar zone 141, the turbulent zone 142, and the transition zone 143 of the runner 14 correspond and communicate with the outlet 140.
  • the present invention provides a low-turbulence impeller for a fluid pump to mitigate or obviate the aforementioned problems.
  • the main objective of the present invention is to provide a low-turbulence impeller for a fluid pump that can eliminate cavitation corrosion of the fluid to reduce energy consumption and promote fluid-draining efficiency.
  • the low-turbulence impeller for a fluid pump comprises a first base wall, a second base wall, multiple guiding blades, multiple back-up plates, and multiple runners.
  • the first base wall has a first inner surface and a first periphery.
  • the second base wall is spaced apart from the first base wall.
  • the second base wall has a second inner surface facing the first inner surface, a second periphery, and an inlet.
  • the inlet is formed through the second base wall.
  • the guiding blades are connected to the first inner surface and the second inner surface.
  • the guiding blades are curved and are spaced apart from each other.
  • Each one of the guiding blades has an inner end, an outer end, a first blade surface, and a second blade surface.
  • the multiple back-up plates are respectively mounted on the first periphery of the first base wall and the second periphery of the second base wall.
  • the back-up plates are annularly spaced apart from each other.
  • Each one of the back-up plates is intrgratedly connected to the outer end of a corresponding guiding blade.
  • Each one of the runners is formed between two adjacent guiding blades.
  • Each one of the runners has an outlet.
  • the outlet is formed between two adjacent back-up plates.
  • Each one of the runners has a laminar zone and a turbulent zone.
  • the laminar zone is near the first blade surface of one of the two adjacent guiding blades and communicates with a corresponding outlet.
  • the turbulent zone is near the second blade surface of the other guiding and aligns with the corresponding back-up plate.
  • a first preferred embodiment of a low-turbulence impeller for a fluid pump in accordance with the present invention is mounted in a casing of a centrifugal pump (not shown in figures).
  • the centrifugal pump rotates the low-turbulence impeller.
  • the low-turbulence impeller for a fluid pump comprises a first base wall 2, a second base wall 3, multiple guiding blades 4, multiple back-up plates 5, and multiple runners 6.
  • the first base wall 2 is circular and has a first inner surface 21, a first periphery 22, and a coupling portion 23.
  • the coupling portion 23 is connected to a transmission shaft of a motor and is rotated by the motor.
  • the second base wall 3 is spaced apart from and parallel to the first base wall 2.
  • the second base wall 3 is circular and has a second inner surface 31 facing the first inner surface 21, a second periphery 32, and an inlet 33.
  • the inlet 33 is formed through the second base wall 2 to allow fluid such as air or liquid to enter.
  • the guiding blades 4 are connected to the first inner surface 21 and the second inner surface 31.
  • the guiding blades 4 are curved and are spaced apart from each other.
  • Each one of the guiding blades 4 is arched and has an inner end 41, an outer end 42, a first blade surface 43, and a second blade surface 44.
  • the inner end 41 and the outer end 42 are disposed opposite to each other.
  • the first blade surface 43 is disposed between the inner end 41 and the outer end 42.
  • the second blade surface 44 is disposed opposite to the first blade surface 43.
  • the multiple back-up plates 5 are mounted between the first periphery 22 of the first base wall 2 and the second periphery 32 of the second base wall 3.
  • the back-up plates 5 are connected to the first inner surface 21 of the first base wall 2 and the second inner surface 31 of the second base wall 3.
  • the back-up plates 5 are annularly spaced apart from each other.
  • Each one of the back-up plates 5 is integratedly connected to the outer end 42 of a corresponding guiding blade 4 to block the fluid.
  • Each one of the runners 6 is formed between two adjacent guiding blades 4 and two adjacent back-up plates 5 connected to said two adjacent guiding blades 4.
  • Each one of the runners 6 has an outlet 60.
  • the outlet 60 is formed between said two adjacent back-up plates 5.
  • Each one of the runners 6 has a laminar zone 61, a turbulent zone 62, and a transition zone 63.
  • the laminar zone 61 is near the first blade surface 43 of one of the two adjacent guiding blades 4 and communicates with a corresponding outlet 60.
  • the turbulent zone 62 is near the second blade surface 44 of the other guiding blade 4 and aligns with the corresponding back-up plate 5.
  • the transition zone 63 is located between the laminar zone 61 and the turbulent zone 62 and aligns with the corresponding back-up plate 5.
  • each back-up plate 5 has a connecting end 5 land a terminal end 52.
  • the connecting end 51 is connected to the outer end 42 of a corresponding guiding blade 4.
  • the terminal end 52 is disposed opposite to the connecting end 51 of the back-up plate 5.
  • the connecting end 51 of each back-up plate 5 is integrated with the outer end 42 of the corresponding guiding blade 4 to prevent the fluid from flowing out between the back-up plate 5 and the guiding blade 4.
  • each back-up plate 5 has a blocking surface 53 formed between the connecting end 51 and the terminal end 52.
  • the blocking surface 53 is used to block the flowing fluid.
  • the blocking surface 53 of each back-up plate 5 and the second blade surface 44 of a corresponding guiding blade 4 are connected to each other and have an included angle A.
  • the included angle A is an obtuse angle and is adjustable based on an actual design requirement.
  • the motor drives the low-turbulence impeller for a fluid pump to rotate along a direction R by the transmission shaft, the fluid is flowed into the low-turbulence impeller through the inlet 33, and then the fluid is flowed into each one of the runners 6 by centrifugal forces. Part of the fluid is flowed out of the laminar zone 61 along a direction of arrow D through the outlet 60, and part of the fluid in the turbulent zone 62 and transition zone 63 is blocked by the blocking surfaces 53 of the back-up plates 5.
  • a length of each back-up plate 5 is designed according to an area of the outlet 60.
  • the area of the outlet 60 is calculated by an area of the inlet 33, a flowing velocity of the fluid flowing out the inlet 33, and a flowing velocity of the fluid flowing out of the outlet 60.
  • a reduction ratio of the outlet 60 is determined by the flowing velocity of the fluid flowing out the inlet 33 divided by the flowing velocity of the fluid flowing out of the outlet 60.
  • the ring member 50B is securely mounted around the first periphery 22 of the first base wall 2 and the second periphery 32 of the second base wall 3.
  • the ring member 50 is mounted securely on the first base wall 2 and the second base wall 3 by soldering or screwing.
  • the ring member 50B has two rings 54B and multiple back-up plates 55B.
  • the rings 54B are spaced apart from each other.
  • the back-up plates 55B are formed between the rings 54B.
  • a third preferred embodiment of a low-turbulence impeller for a fluid pump in accordance with the present invention is shown.
  • the structure and operation of the third preferred embodiment are approximately the same as the first preferred embodiment.
  • the low-turbulence impeller for a fluid pump has multiple guiding blades 4C.
  • Each one of the guiding blades 4C has an inner end 41C.
  • the inner end 41C is cambered relative to the inner end 41 of the guiding blades 4.
  • the low-turbulence impeller for a fluid pump is applied to fluid that has a specific weight less than 1, such as air.
  • Every preferred embodiment of the low-turbulence impeller for a fluid pump has multiple back-up plates 5, 55B mounted in the runners 6. So the fluid can only be flowed out of the outlets 60 from the laminar zone 61. Thereby, the fluid through each outlet 60 is in low-turbulence condition.
  • the phenomenon of inverse flow caused by negative pressures and cavitation corrosion caused by turbulent flow is greatly reduced to avoid damaging the guiding blades 4,4C.
  • the rotational velocity of the low-turbulence impeller is enhanced in operational condition to promote the fluid-draining efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15168591.4A 2014-05-26 2015-05-21 Low turbulence centrifugal pump impeller wherein the downstream part of the blades extends circumferentially Withdrawn EP2949943A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW103118262A TW201441489A (zh) 2014-05-26 2014-05-26 流體泵浦低紊流動葉輪

Publications (1)

Publication Number Publication Date
EP2949943A1 true EP2949943A1 (en) 2015-12-02

Family

ID=52422831

Family Applications (1)

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EP15168591.4A Withdrawn EP2949943A1 (en) 2014-05-26 2015-05-21 Low turbulence centrifugal pump impeller wherein the downstream part of the blades extends circumferentially

Country Status (5)

Country Link
US (1) US20150337665A1 (zh)
EP (1) EP2949943A1 (zh)
JP (1) JP3199013U (zh)
DE (1) DE202015102491U1 (zh)
TW (1) TW201441489A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094358A (zh) * 2019-05-18 2019-08-06 东北石油大学 一种气泡破碎式混输电潜泵叶轮
RU2757242C1 (ru) * 2020-09-30 2021-10-12 Общество с ограниченной ответственностью «Лизинговая Компания «ЛИАКОН» Радиально-осевая гидротурбина и способ её изготовления

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD762841S1 (en) * 2015-03-17 2016-08-02 Wilkins Ip, Llc Impeller
CN106555775B (zh) 2015-09-30 2020-06-23 浙江三花汽车零部件有限公司 叶轮、转子组件、离心泵以及电驱动泵
CN107269577B (zh) * 2017-07-31 2023-04-07 重庆水泵厂有限责任公司 带l型叶片的半开式离心泵叶轮及使用该叶轮的离心泵
CN107524627B (zh) * 2017-09-08 2019-01-22 刘政 静压向心叶轮及其设计方法
USD975746S1 (en) * 2019-04-30 2023-01-17 Cooler Master Development Corporation Impeller of water pump
USD979607S1 (en) * 2020-02-03 2023-02-28 W.S. Darley & Co. Impeller for a pump
USD1006056S1 (en) * 2020-02-03 2023-11-28 W.S. Darley & Co. Impeller blade for a pump
USD958842S1 (en) * 2020-04-04 2022-07-26 Colina Mixing pump impeller vane assembly
USD940760S1 (en) * 2020-04-04 2022-01-11 Colina Mixing pump impeller

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1030561A (en) * 1910-09-02 1912-06-25 Ernest E Blackmer Fan.
DE1152887B (de) * 1955-03-16 1963-08-14 Roth Co Roy E Mehrstufige Pumpe zum Foerdern von siedenden oder nahezu siedenden Fluessigkeiten bzw. verfluessigten Gasen
GB954369A (en) * 1959-07-24 1964-04-08 Eck Bruno Drum-type fan rotor with forwardly curved blades
US3751179A (en) * 1971-07-26 1973-08-07 Westinghouse Electric Corp Bi-directional centrifugal pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR463973A (fr) * 1912-11-14 1914-03-10 Edmund Scott Gustave Rees Perfectionnements aux pompes centrifuges, turbines, condenseurs, etc.
GB160474A (en) * 1919-08-01 1921-03-31 James Wareing Improvements in and relating to centrifugal pumps
GB253302A (en) * 1925-04-24 1926-06-17 William Ernest Wyatt Millingto Improvements relating to centrifugal pumps
US3027845A (en) * 1959-11-16 1962-04-03 Worthington Corp Impeller tip pocket
GB2143285B (en) * 1983-07-14 1987-11-11 Warman Int Ltd Centrifugal impeller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1030561A (en) * 1910-09-02 1912-06-25 Ernest E Blackmer Fan.
DE1152887B (de) * 1955-03-16 1963-08-14 Roth Co Roy E Mehrstufige Pumpe zum Foerdern von siedenden oder nahezu siedenden Fluessigkeiten bzw. verfluessigten Gasen
GB954369A (en) * 1959-07-24 1964-04-08 Eck Bruno Drum-type fan rotor with forwardly curved blades
US3751179A (en) * 1971-07-26 1973-08-07 Westinghouse Electric Corp Bi-directional centrifugal pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094358A (zh) * 2019-05-18 2019-08-06 东北石油大学 一种气泡破碎式混输电潜泵叶轮
RU2757242C1 (ru) * 2020-09-30 2021-10-12 Общество с ограниченной ответственностью «Лизинговая Компания «ЛИАКОН» Радиально-осевая гидротурбина и способ её изготовления

Also Published As

Publication number Publication date
US20150337665A1 (en) 2015-11-26
DE202015102491U1 (de) 2015-09-04
JP3199013U (ja) 2015-07-30
TW201441489A (zh) 2014-11-01

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