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EP3653887A1 - Zentrifugalpumpenflügelrad - Google Patents

Zentrifugalpumpenflügelrad Download PDF

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Publication number
EP3653887A1
EP3653887A1 EP18832090.7A EP18832090A EP3653887A1 EP 3653887 A1 EP3653887 A1 EP 3653887A1 EP 18832090 A EP18832090 A EP 18832090A EP 3653887 A1 EP3653887 A1 EP 3653887A1
Authority
EP
European Patent Office
Prior art keywords
impeller
vanes
line tangent
angle
vane
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Withdrawn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
EP18832090.7A
Other languages
English (en)
French (fr)
Inventor
Yurii Alexandrovich NIFANTOV
Sergei Vladimirovich TOIBICH
Pavel Sergeevich PATSEI
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.)
Obshestvo S Ogranichennoi Otvetstvennost'u Nauchno Proizvodstvennaya "ades" Firma
Original Assignee
Obshestvo S Ogranichennoi Otvetstvennost'u Nauchno Proizvodstvennaya "ades" Firma
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 Obshestvo S Ogranichennoi Otvetstvennost'u Nauchno Proizvodstvennaya "ades" Firma filed Critical Obshestvo S Ogranichennoi Otvetstvennost'u Nauchno Proizvodstvennaya "ades" Firma
Publication of EP3653887A1 publication Critical patent/EP3653887A1/de
Withdrawn legal-status Critical Current

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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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • 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
    • 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

Definitions

  • This invention relates to equipment designed for pumping fluids and can be used in industry, agriculture and in household.
  • centrifugal pump impeller containing vanes with curvature in one plane [ CN205779755 , priority date 19.05.2016, publication date 7.12.2016; MPC: FO4D 13/06].
  • 15 - 27 range [ CN204152837 ); priority date 15.10.2014; publication date 11.02.2015; MPC: F04D 29/24] was chosen for this invention as its prototype.
  • the drawback of the prototype is that fluid moves slowly at the impeller outlet due the small angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller. Increasing that angle would result in hydrodynamic losses and would reduce the efficiency coefficient of the impeller, which impairs service characteristics of the centrifugal pump.
  • the technological problem this invention aims to solve, is improving exploitation characteristics of centrifugal pumps.
  • the technological result achieved by this invention is a greater centrifugal pressure generated, while the efficiency coefficient of the centrifugal pump impeller is not affected.
  • centrifugal pump impeller characterized by the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller being located in the 40°-90° range, while the shape of a vane corresponds to a second-order surfaces, which permits the vanes to be inclined towards the impeller rotation direction and stretched towards the impeller eye.
  • the centrifugal pump impeller can be manufactured by either casting or spot welding and can be either flat or concave.
  • the impeller includes the main and cover discs and vanes.
  • the impeller has an inlet (eye) in the central part and an outlet on the side (butt) surface.
  • the impeller carries radial working channels between the vanes, running from the eye to the outlet.
  • the vanes are designed to generate a centrifugal force and transform mechanical energy of the impeller to hydrodynamic energy of the fluid.
  • Each vane has a leading and a trailing edge.
  • the trailing edges of the vanes cast out the fluid from the radial working channels.
  • the trailing edges are located at the impeller outlet.
  • the angle between the line tangent to the vane trailing edge and the line tangent to the circumference of the impeller is located in the 40°-90° range, which increases the circumferential component of absolute velocity at the ends of the vanes. Having that angle less than 40° does not increase the centrifugal force, while having that angle above 90° might result in hydraulic resistance becoming too high, thus impairing efficiency and making the impeller wear out faster.
  • the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller must be in the 80°-90° range.
  • the shape of the vanes is represented by second-order surfaces, which means that any section of a vane along any plane has a curvature, which makes it possible to have the vanes inclined towards the rotation direction of the impeller as well as their maximum stretching towards the eye of the impeller.
  • the second-order surface can be profiled by calculating triangles of velocity for a large number of sections, taking into account the chosen angles between the lines tangent to the trailing and leading edges of the vanes on the one hand and the lines tangent to the circumferences of the impeller on the other hand.
  • the leading edge of a vane can be placed as close to the eye of the impeller as possible, while the angle between the line tangent to the leading edge of a vane and the line tangent to the circumference of the impeller can be chosen in the 10-25° range.
  • the angle between the line tangent to the leading edge of a vane and the line tangent to the circumference of the impeller can be chosen in the 12°-15° range, while the angle between the line tangent to the trailing edge of a vane and the line tangent to the circumstance of the impeller can be chosen in the 80°-90° range.
  • the latter may contain one or more rows of auxiliary vanes, which can be of the same shape as the main vanes.
  • the trailing edges of the auxiliary vanes in relation to the trailing edges of the main vanes can be placed at the same distance from the rotation axis of the impeller.
  • the length of the auxiliary vanes of the first row can measure 40-60% of the length of the main vanes, while the auxiliary vanes of the consecutive rows can measure 40-60% of the length of the vanes of the preceding rows, which ensures their lowest hydrodynamic resistance to the flow of fluid.
  • the angle between the line tangent to the trailing edge of an auxiliary vane and the line tangent to the circumference of the impeller can be chosen in the 40°-90° range, which also drives up the centrifugal force. Also, the use of auxiliary vanes improves the weight and size characteristics of the impeller because the number and thickness of main vanes can be reduced. It also affords having impellers manufactured out of polymer materials.
  • This invention possesses the previously unknown in set of essential technological characteristics, characterised by the following:
  • the set of new features of this invention increases the dynamic component of the centrifugal force, reduces hydrodynamic resistance and improves cavitation resistance of the impeller, thus achieving the desired technological goals: increasing the centrifugal force without affecting the efficiency coefficient of the impeller and improving service characteristics of centrifugal pumps.
  • the new important characteristics of this invention suggest that it meets the "novelty" and "level of invention” criteria of patentability.
  • This model can be manufactured from available materials, using commonly used methods, which means that this invention meets the "industrial applicability" criterion of patentability.
  • the centrifugal pump contains an impeller with an eye and an outlet, which includes the main disk 1, the cover disk 2 and the vanes 3 shaped as a second-order curve, which makes it possible to have the vanes inclined towards the impeller rotation direction and their stretching towards the impeller eye.
  • the ⁇ 1 angle between the line tangent to the trailing edge of a vane and the line tangent to the circumference of the impeller is 90°
  • the ⁇ 2 angle between the line tangent to the leading edge of the vane and the line tangent to the circumference of the impeller is 12°.
  • the invention operates as follows.
  • the centrifugal pump is immersed in a fluid, and its impeller starts to rotate.
  • the fluid is sucked through the eye of the impeller and, skirting the leading edges of the vanes 3, placed at the ⁇ 2 angle at a minimum hydrodynamic resistance, moves along the second-order curves of the vanes 3, interacts with the trailing edges of the vanes 3, placed at the ⁇ 1 angle, and- acquiring a maximum absolute velocity- leaves the impeller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18832090.7A 2017-07-10 2018-04-28 Zentrifugalpumpenflügelrad Withdrawn EP3653887A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2017124511A RU2661801C1 (ru) 2017-07-10 2017-07-10 Рабочее колесо центробежного насоса
PCT/RU2018/050046 WO2019013672A1 (ru) 2017-07-10 2018-04-28 Рабочее колесо центробежного насоса

Publications (1)

Publication Number Publication Date
EP3653887A1 true EP3653887A1 (de) 2020-05-20

Family

ID=62917259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18832090.7A Withdrawn EP3653887A1 (de) 2017-07-10 2018-04-28 Zentrifugalpumpenflügelrad

Country Status (5)

Country Link
US (1) US20210364006A1 (de)
EP (1) EP3653887A1 (de)
EA (1) EA036239B1 (de)
RU (1) RU2661801C1 (de)
WO (1) WO2019013672A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112128120A (zh) * 2020-09-17 2020-12-25 青岛海信日立空调系统有限公司 超薄室内机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2733500C1 (ru) * 2020-02-28 2020-10-02 Общество с ограниченной ответственностью «Лизинговая Компания «ЛИАКОН» Рабочее колесо центробежного насоса с улучшенным кавитационным запасом

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU769102A1 (ru) * 1978-11-02 1980-10-07 Специальное Конструкторско-Технологическое Бюро Герметичных И Скважинных Насосов (Сктбн) Рабочее колесо центробежного насоса
SU1141221A1 (ru) * 1983-02-09 1985-02-23 МВТУ им.Н.Э.Баумана Рабочее колесо центробежного насоса
CS234599B1 (cs) * 1983-11-28 1985-04-16 Jan Vykopal Oběžné kolo
SU1423809A1 (ru) * 1986-12-30 1988-09-15 Коломенский тепловозостроительный завод им.В.В.Куйбышева Рабочее колесо центробежного насоса
SU1435847A1 (ru) * 1987-01-14 1988-11-07 Всесоюзный научно-исследовательский институт нерудных строительных материалов и гидромеханизации Рабочее колесо центробежного грунтового насоса
SU1605034A1 (ru) * 1988-08-11 1990-11-07 Всесоюзный Научно-Исследовательский Институт Горной Механики Им.М.М.Федорова Лопатка колеса центробежного насоса
CN2204344Y (zh) 1993-08-02 1995-08-02 成都杜同水轮机研究所 一种离心泵叶轮
RU2126102C1 (ru) * 1997-11-05 1999-02-10 Козлов Анатолий Иванович Насос для жидкости
WO1999036701A1 (fr) * 1998-01-14 1999-07-22 Ebara Corporation Turbomachines centrifuges
RU2161737C1 (ru) * 2000-03-02 2001-01-10 Открытое акционерное общество "Альметьевский насосный завод" Многоступенчатый центробежный насос
CN204152837U (zh) * 2014-10-15 2015-02-11 黄晓东 低比转速高效离心水泵
US10584705B2 (en) * 2015-04-30 2020-03-10 Zhejiang Sanhua Automotive Components Co., Ltd. Centrifugal pump and method for manufacturing the same
CN205779755U (zh) 2016-05-19 2016-12-07 宁波沃力机电有限公司 一种提高最高扬程的离心式水泵

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112128120A (zh) * 2020-09-17 2020-12-25 青岛海信日立空调系统有限公司 超薄室内机

Also Published As

Publication number Publication date
RU2661801C1 (ru) 2018-07-19
EA201890879A2 (ru) 2019-01-31
WO2019013672A1 (ru) 2019-01-17
US20210364006A1 (en) 2021-11-25
EA036239B1 (ru) 2020-10-16
EA201890879A3 (ru) 2019-05-31

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