EP3653887A1 - Roue de travail d'une pompe centrifuge - Google Patents
Roue de travail d'une pompe centrifuge Download PDFInfo
- 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- Withdrawn
Links
- 239000012530 fluid Substances 0.000 abstract description 8
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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)
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 (fr) | 2017-07-10 | 2018-04-28 | Roue de travail d'une pompe centrifuge |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3653887A1 true EP3653887A1 (fr) | 2020-05-20 |
Family
ID=62917259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18832090.7A Withdrawn EP3653887A1 (fr) | 2017-07-10 | 2018-04-28 | Roue de travail d'une pompe centrifuge |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210364006A1 (fr) |
EP (1) | EP3653887A1 (fr) |
EA (1) | EA036239B1 (fr) |
RU (1) | RU2661801C1 (fr) |
WO (1) | WO2019013672A1 (fr) |
Cited By (1)
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)
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)
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 |
-
2017
- 2017-07-10 RU RU2017124511A patent/RU2661801C1/ru active
-
2018
- 2018-04-28 EP EP18832090.7A patent/EP3653887A1/fr not_active Withdrawn
- 2018-04-28 WO PCT/RU2018/050046 patent/WO2019013672A1/fr unknown
- 2018-04-28 US US16/629,815 patent/US20210364006A1/en not_active Abandoned
- 2018-05-03 EA EA201890879A patent/EA036239B1/ru not_active IP Right Cessation
Cited By (1)
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 |
---|---|
EA201890879A3 (ru) | 2019-05-31 |
EA036239B1 (ru) | 2020-10-16 |
WO2019013672A1 (fr) | 2019-01-17 |
EA201890879A2 (ru) | 2019-01-31 |
RU2661801C1 (ru) | 2018-07-19 |
US20210364006A1 (en) | 2021-11-25 |
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Effective date: 20201103 |