EP2628958A2 - Roue directrice pour une pompe et pompe - Google Patents

Roue directrice pour une pompe et pompe Download PDF

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Publication number
EP2628958A2
EP2628958A2 EP13154757.2A EP13154757A EP2628958A2 EP 2628958 A2 EP2628958 A2 EP 2628958A2 EP 13154757 A EP13154757 A EP 13154757A EP 2628958 A2 EP2628958 A2 EP 2628958A2
Authority
EP
European Patent Office
Prior art keywords
blade
guide wheel
projection
pump
impeller
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Withdrawn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
EP13154757.2A
Other languages
German (de)
English (en)
Other versions
EP2628958A3 (fr
Inventor
Stefanie Roth
Tobias Albert
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP2628958A2 publication Critical patent/EP2628958A2/fr
Publication of EP2628958A3 publication Critical patent/EP2628958A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers

Definitions

  • the invention relates to a stator for an impeller pump, as used in particular as a heated impeller pump in household appliances such as dishwashers or washing machines. Furthermore, the invention relates to an impeller pump with such a stator.
  • the invention has for its object to provide an aforementioned stator and a corresponding impeller pump with which problems of the prior art can be avoided and in particular a further improved function of the impeller pump or water supply is possible.
  • the stator has a base body which is annularly circulating with a central longitudinal axis, to which the base body can be rotationally symmetrical, and which is also designed to be arranged in a pump chamber of the impeller pump.
  • At least one blade is arranged on a radial outer side of the main body, advantageously a plurality of which projects outwards and runs along this at least part of the circumferential direction of the main body.
  • the blade has a pitch compared to the central longitudinal axis, advantageously in the manner of a helix.
  • the blade at least on one side or surface of the blade at the outer edge of a projection or a thickening is provided, which can advantageously form a kind of lip.
  • the blade is not only flat with regard to its cross-sectional area or straight line, under some circumstances also slightly tapered towards the outer edge, as is known from the prior art.
  • it is just on at least one side still provided with the projection or the thickening, which results in a significantly improved efficiency of the water supply found within the scope of the invention.
  • this projection or the thickening can be generated or formed together with the shape of the other blade a kind of channel. In this air bubbles in the liquid, which is located in the pump chamber, ascend or move generally toward the outlet nozzle from the pump chamber.
  • the stator may have at least three blades. It is advantageous four or five blades or even more, running along the outside of the body. Particularly advantageously, the blades almost overlap in the circumferential direction, so that virtually a continuous blade effect can be generated around the main body of the stator.
  • the base body has a certain height in the direction of the central longitudinal axis, so that its cross section may be quasi oblong or rectangular with a relatively small thickness compared to the height.
  • At least one blade may extend in its longitudinal course over substantially the entire height of the body, advantageously all blades.
  • the blades are generally identical in each case.
  • the blades can advantageously also be designed so that their pitch is substantially constant. Alternatively, they can be in
  • the blades of the main body do not protrude exclusively in the radial direction, but slightly inclined. They can have an angle ⁇ between 60 ° and 80 ° to the central longitudinal axis.
  • the projection or the thickening is particularly advantageously arranged on that side of the blade, which has the larger angle to the central longitudinal axis or which is inclined or angled towards the base body more.
  • the thickness or height of the projection or the thickening decreases, in particular seen approximately in the axial direction, advantageously monotonously or continuously.
  • neither the blade nor the projection or the thickening should project beyond the height of the base body in the direction of the central longitudinal axis.
  • a decrease in the thickness or height of the projection or the thickening is advantageously along the axial direction of the pump against the axial flow component of the water or in this axial direction of the water flow, the thickness or height of the projection or the thickening increases.
  • the projection or the thickening can be approximately twice the thickness of the blade, particularly advantageously about as thick as the blade and thus form a distinct lip on the edge.
  • a change in the thickness or height of the projection or the thickening may be such that at the thinnest point completely disappears or almost disappears and only is still quite easily provided on the blade.
  • the projection or the thickening is provided just at the edge of the blade or a blade side. It is advantageous if the projection or the thickening is rounded in cross-section, both radially outwardly and radially inwardly and also at the highest point. As a result, turbulences in the pumped liquid can be reduced.
  • the base body is formed substantially as a ring in the manner of a short pipe section.
  • Inner side and / or outer side can be straight and run parallel to the central longitudinal axis.
  • the diameter of the base body can be approximately four times to ten times the height of the base body.
  • the height of the body in turn is about four times to ten times its thickness.
  • the thickness of the blades can be approximately in the region of the thickness of the base body, advantageously somewhat thinner to half or even only up to one third of its thickness.
  • the main body is advantageously made of a rather solid material and is particularly rigid.
  • the preferred integrally molded or molded blade advantageously consist of the same material, alternatively, a two-component syringes with at least partially made of elastic material blades is conceivable.
  • the projection or the thickening is advantageously also integrally formed on the blade, particularly advantageously made of the same material.
  • the impeller pump according to the invention has a pump chamber in which the impeller rotates.
  • An inlet port leads into the pump chamber and toward the impeller, with an outlet port extending from the pump chamber, particularly at the end of the pump chamber axially remote from the impeller.
  • a prescribed stator with a projection or a Thickening placed over an extension of the inlet nozzle in the pump chamber, on the outside thereof.
  • the stator or its blades should not extend to the radially outer Pumpencrowandung, but have a distance therefrom, which can range from half the width of the blades to twice the width.
  • a pump 11 according to the invention is shown in section, as they are of the construction essentially of the aforementioned DE 102007017271 A1 , to which reference is explicitly made in this respect, corresponds to a radial pump or impeller pump. It can be used advantageously in a dishwasher or washing machine.
  • the pump 11 has a pump housing 12 with inlet 13, outlet 14 and pump chamber 16. Close to a pump chamber bottom, a conventional impeller 18 is arranged as the impeller. It is driven by an unspecified pump motor 20. By rotation of the impeller 18 fluid is sucked to the inlet 13 in the axial direction along the dashed longitudinal center axis L of the pump 11 and ejected from the impeller 18 in the radial direction. Then, the fluid in the pumping chamber 16 is circulated, as shown in FIG Fig. 1 left into the plane and right out, and finally exits after several rounds at the outlet 14 from the pump 11.
  • the pump chamber 16 is delimited by a heating device 22, which therefore also simultaneously forms an aforementioned radially outer pump chamber wall.
  • the heater 22 seals the pump chamber 16 as a radially outer pump chamber wall via two circumferential sealing rings 23a and 23b, respectively, and is sealingly connected to the pump housing 12.
  • a stator 25 is arranged according to the invention on a pipe socket 24 around the inlet 13 or this is placed on the pipe socket 24 and fixed there, for example, by clamping snug fit.
  • the stator 25 has an annular base body 27, on the outside projecting several blades 29 are provided.
  • the structural design is hereinafter in connection with the Fig. 2 to 6 explained in more detail.
  • the blades 29 are arranged at a slight angle or angle to the base body 27, and they are at an angle ⁇ of about 75 ° to the longitudinal central axis L or are in the flow direction of the liquid in the pump chamber 16 with the axial flow component S of inclined like a ring or helical rotating funded water.
  • the angle ⁇ is not directly in Fig. 1 marked but recognizable. This will also be explained in more detail below.
  • Fig. 2 From the oblique view in Fig. 2 It can be seen that 27 four blades 29 are arranged on the stator 25 with the annular base body. It can be seen that the blades 29 each make almost a quarter turn around the base body 27 and thus almost overlap in the circumferential direction or nearly reach each other in the circumferential direction.
  • the slope of the blades 29 in relation to the longitudinal central axis L from Fig. 1 varies here. It can be seen on the front blade 29 that the slope is flatter lower right first, then increases more and then remains the same in a slightly longer range.
  • the axial flow component S is shown for comparison. This means that in the pump 11, the pitch of the blades 29 at the beginning, so close to the pump chamber bottom 17, is slightly larger and then slightly decreases.
  • a projection on top of the side of the blades 29 is placed or formed as a projection 32. This can be even better from the enlarged sectional view in the 3 and 4 seen. Usually would the blade 29 to the outer edge 30 out approximately constant thickness.
  • the profile of the blade 29 is changed.
  • a type of channel 34 is formed between the projection 32 and, to the right inwards, the corresponding outer side of the main body 27. This channel 34 simply improves the outflow of air bubbles in the circumferential direction Water.
  • the air bubbles can collect very well, accumulate and be transported away. Furthermore, they are so far away in any case from the inside of the heater 22 and there can no longer cause the above-mentioned problems of over-temperature.
  • the thickness or height of the projection 32 decreases in the course of the blades 29. This takes place in the direction of view along the axial flow component S in the clockwise direction or in the case of the front blades 29 from the bottom right to the top left.
  • the decrease in thickness or height can be such that it goes to zero.
  • the normal thickness of the blades 29 may be about 2 mm
  • the maximum height of the projection 32 may be 1 mm to 2 mm.
  • Fig. 4 is shown as an alternative embodiment of a blade 29a with a projection 32a at the outer edge 30a, a cross-section which is substantially triangular and thereby edged or pointed.
  • a pointed configuration of the cross section of the projection 32 with a correct tip can cause a promotion of air bubbles better in the channel 34a to the main body 27a out is possible.
  • the height of the projection 32a is slightly below the thickness of the blade 29a.
  • a projection 32b is also arranged again on the outer edge 30b of the blade 29b.
  • the projection 32b is substantially triangular and pointed in cross-section, the tip 33b being inclined far inward over the channel 34b towards the base body 27b.
  • the channel 34b becomes more closed, so to speak.
  • Fig. 6 can be seen in the case of a projection 32c on the outer edge 30c of a blade 29c, the tip 33c is inclined outwardly. In this case, it is even inclined in the radial direction beyond the outer edge 30c or projects beyond it.
  • the channel 34c is even more open.
  • the projections 32a to 32c may also be less pointed or the tips 33a to 33c may be more rounded.
  • Fig. 8 is in each case the hydraulic efficiency of the two guide wheels accordingly Fig. 7 applied.
  • the measurements on the pump showed no increased power requirement, that from a volume flow of about 40 l / min, the hydraulic efficiency is slightly improved, namely between 0.4% and just under 1%.
  • an advantage can be achieved, especially for larger flow rates.
  • Fig. 9 in each case the course of the required power over time for a venting process in the pump 11 is shown, so if there are air bubbles in the water conveyed there.
  • a stator according to the invention with a projection on the blades due to the faster increase in power venting is completed earlier or has been made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP13154757.2A 2012-02-17 2013-02-11 Roue directrice pour une pompe et pompe Withdrawn EP2628958A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012202491A DE102012202491B3 (de) 2012-02-17 2012-02-17 Leitrad für eine Impellerpumpe und Impellerpumpe

Publications (2)

Publication Number Publication Date
EP2628958A2 true EP2628958A2 (fr) 2013-08-21
EP2628958A3 EP2628958A3 (fr) 2014-01-08

Family

ID=47739088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13154757.2A Withdrawn EP2628958A3 (fr) 2012-02-17 2013-02-11 Roue directrice pour une pompe et pompe

Country Status (6)

Country Link
US (1) US9388822B2 (fr)
EP (1) EP2628958A3 (fr)
CN (1) CN103557156B (fr)
BR (1) BR102013003517A2 (fr)
DE (1) DE102012202491B3 (fr)
MX (1) MX2013001561A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015145386A1 (fr) * 2014-03-26 2015-10-01 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Pompe centrifuge pour appareils ménagers
WO2016071118A1 (fr) * 2014-11-06 2016-05-12 Xylem Ip Management S.À R.L. Dispositif de mise en température
CN110513325A (zh) * 2019-09-17 2019-11-29 兰州理工大学 一种具有后置反向加厚分流叶片的螺旋轴流泵叶轮
EP4140386A4 (fr) * 2020-04-30 2023-10-11 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Élément de guidage d'écoulement, pompe collectrice de chaleur et lave-vaisselle
US12241479B2 (en) 2020-01-06 2025-03-04 Guangdong Welling Motor Manufacturing Co., Ltd. Diffuser, air supply device, and vacuum cleaning equipment

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2711557B1 (fr) * 2012-09-20 2019-10-02 Sulzer Management AG Rotor pour pompe centrifuge
DE102013211180A1 (de) 2013-06-14 2014-12-18 E.G.O. Elektro-Gerätebau GmbH Pumpe
CN107288929A (zh) * 2016-04-11 2017-10-24 广东顺德思客乐施电器科技有限公司 区分叶轮腔和加热腔的洗碗机水泵
US11127279B2 (en) 2017-11-29 2021-09-21 Essity Hygiene And Health Aktiebolag Usage detection of hygiene equipment
CN108252927A (zh) * 2017-12-11 2018-07-06 安徽颐博思泵业有限责任公司 一种卧式多级泵
US10993601B2 (en) 2019-01-25 2021-05-04 Haier Us Appliance Solutions, Inc. Dishwashing appliances and pump assemblies
CN112012933B (zh) 2019-05-29 2021-08-24 广东美的白色家电技术创新中心有限公司 集热泵和家用电器
CN112443487A (zh) * 2019-09-03 2021-03-05 广东美的白色家电技术创新中心有限公司 一种具有加热装置的泵及一种清洁装置
EP4008907B1 (fr) 2019-09-03 2024-06-12 Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. Pompe de chauffage et dispositif de nettoyage doté de celle-ci
CN113074142B (zh) * 2020-01-06 2022-05-13 广东威灵电机制造有限公司 扩压装置、风机及吸尘器
CN113074139B (zh) * 2020-01-06 2023-05-12 广东威灵电机制造有限公司 扩压装置、风机及吸尘器
DE102023135001A1 (de) * 2023-12-13 2025-06-18 E.G.O. Elektro-Gerätebau GmbH Pumpe und Haushaltsgerät mit einer solchen Pumpe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007017271A1 (de) 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pumpe mit Heizeinrichtung

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR1401253A (fr) 1964-04-01 1965-06-04 Materiel Telephonique Diffuseur monobloc pour pompes multicellulaires
FR2631084B1 (fr) * 1988-05-09 1994-03-11 Alsthom Pompe centrifuge
DE4000657C2 (de) 1990-01-11 1993-12-02 Klein Schanzlin & Becker Ag Leitrad
US5102297A (en) 1990-08-08 1992-04-07 Thompson George A Centrifugal pump with cavitation reducing propeller
IT1315546B1 (it) * 2000-11-14 2003-02-18 Calpeda A Spa Ruota direttrice per pompe centrifughe
JP3924233B2 (ja) * 2002-10-09 2007-06-06 日機装株式会社 ターボポンプのディフューザ
US7475539B2 (en) 2006-05-24 2009-01-13 Honeywell International, Inc. Inclined rib ported shroud compressor housing
DE102007060193A1 (de) * 2007-12-14 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät
ES2351271B1 (es) * 2009-01-26 2011-11-15 Coprecitec, S.L. Bomba de circulación de fluido adaptada a un aparato electrodoméstico.
DE102010038686B4 (de) * 2010-07-30 2023-03-23 BSH Hausgeräte GmbH Wasserführendes Haushaltsgerät, insbesondere Geschirrspülmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007017271A1 (de) 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pumpe mit Heizeinrichtung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015145386A1 (fr) * 2014-03-26 2015-10-01 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Pompe centrifuge pour appareils ménagers
WO2016071118A1 (fr) * 2014-11-06 2016-05-12 Xylem Ip Management S.À R.L. Dispositif de mise en température
US10533149B2 (en) 2014-11-06 2020-01-14 Xylem Ip Management S.À R.L. Temperature control apparatus
CN110513325A (zh) * 2019-09-17 2019-11-29 兰州理工大学 一种具有后置反向加厚分流叶片的螺旋轴流泵叶轮
CN110513325B (zh) * 2019-09-17 2020-10-27 兰州理工大学 一种具有后置反向加厚分流叶片的螺旋轴流泵叶轮
US12241479B2 (en) 2020-01-06 2025-03-04 Guangdong Welling Motor Manufacturing Co., Ltd. Diffuser, air supply device, and vacuum cleaning equipment
EP4140386A4 (fr) * 2020-04-30 2023-10-11 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Élément de guidage d'écoulement, pompe collectrice de chaleur et lave-vaisselle
US11879479B2 (en) 2020-04-30 2024-01-23 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Flow guiding element, heat collecting pump and dishwasher
US12234835B2 (en) 2020-04-30 2025-02-25 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Heat collecting pump and washing appliance
US12595809B2 (en) 2020-04-30 2026-04-07 Foshan Shunde Midea Washing Appliances Manufacturing Co., Ltd. Heat collecting pump and washing appliance having the same

Also Published As

Publication number Publication date
DE102012202491B3 (de) 2013-08-08
CN103557156A (zh) 2014-02-05
EP2628958A3 (fr) 2014-01-08
US20130216370A1 (en) 2013-08-22
MX2013001561A (es) 2013-08-26
US9388822B2 (en) 2016-07-12
BR102013003517A2 (pt) 2015-07-14
CN103557156B (zh) 2017-03-01

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