EP0114932A1 - Roue à canal pour une pompe centrifuge - Google Patents

Roue à canal pour une pompe centrifuge Download PDF

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Publication number
EP0114932A1
EP0114932A1 EP83109755A EP83109755A EP0114932A1 EP 0114932 A1 EP0114932 A1 EP 0114932A1 EP 83109755 A EP83109755 A EP 83109755A EP 83109755 A EP83109755 A EP 83109755A EP 0114932 A1 EP0114932 A1 EP 0114932A1
Authority
EP
European Patent Office
Prior art keywords
blade
housing wall
impeller
edge
centrifugal pump
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.)
Granted
Application number
EP83109755A
Other languages
German (de)
English (en)
Other versions
EP0114932B1 (fr
Inventor
Martin Stähle
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
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
Priority claimed from CH750582A external-priority patent/CH660511A5/de
Priority claimed from CH212183A external-priority patent/CH662864A5/de
Application filed by Individual filed Critical Individual
Publication of EP0114932A1 publication Critical patent/EP0114932A1/fr
Application granted granted Critical
Publication of EP0114932B1 publication Critical patent/EP0114932B1/fr
Expired 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
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel

Definitions

  • the invention relates to a centrifugal pump with a single-bladed impeller of open design, in particular for conveying viscous media, the outlet end of the bladed brushing a housing wall penetrated by the impeller axis, and the pressure-side blade flank in front of the housing wall ending in a front edge running between the tip edge of the blade and the impeller hub .
  • the housing wall penetrated by the impeller axis lies in a radial plane and is largely axially covered by the blade, since the end edge mentioned is only very short. This means that only a relatively small amount of medium gets onto the housing wall and therefore cannot be grasped by the pressure-side blade flank and cannot be conveyed into the outlet channel.
  • the present invention aims to provide a centrifugal pump of the type mentioned which housing wall and front edge work together in such a way that perfect delivery of viscous media is also possible.
  • the centrifugal pump according to the invention is characterized in that the housing wall is a straight truncated cone, the front edge of the impeller blade flank on the pressure side impinging the truncated cone wall with play extending from the blade outlet tip over a relatively long distance to a point at which it extends in the Impeller hub ends.
  • the end edge can be designed as a sharp shear edge which interacts with a counter-shear edge of the housing wall.
  • the relevant angles namely cone angle of the housing wall, flank angle of the blade and circumferential angle of the blade front edge, counter edge angle on the housing and shear edge angle on the blade, can vary within relatively large ranges.
  • the housing wall cone angle and the flank angle of the blade can be between 5 ° and 70 °, and the front edge circumferential angle between 20 ° and 360 ° or more.
  • the counter shear edge angle and the shear edge angle can each be between 5 ° and 90 °, but together should not be 180 °.
  • the single-bladed impeller has a conical hub 1, the axis la of which is mounted in the housing 2 in a manner not shown, passing through the pressure-side housing wall 3.
  • the housing wall 3 forms a straight truncated cone and is brushed with a small clearance 4 by the blade 5, the end edge of which is designated by 6.
  • the angle of inclination ⁇ of the housing wall 3 to the radial plane is called the cone angle below.
  • a milling 10 which is spiraling in the sense of the direction of rotation of the impeller from the inside to the outside and is wedge-shaped in cross section.
  • the radially inner edge 9 of this cutout forms a stationary shear edge, the pitch angle of which is designated by 6.
  • the pressure-side end flank of the blade 5 is denoted by 7 and its flank angle by E. At this angle ⁇ , the blade flank 7 runs out at point 7a into the front edge 8 of the blade 5; At this point 7a the blade end edge 8 ends in the hub 1.
  • the pressure-side boundary of the blade flank 7 extends and the frustum edge 8 of the truncated cone housing wall 3 is covered over a circumferential angle up to the blade tip 8a, into which the blade end edge 6 runs out via a step 6a.
  • the flank angle ⁇ which causes a fibrous material loop coming onto the flank 7 to slide off towards the pressure side and therefore has to be at least about 5 ° is advantageously between 15 ° and 40 °; an angle ⁇ of 30 ° has proven to be particularly suitable.
  • the cone angle of the housing wall 3 ie values between 15 ° and 40 ° are also expedient for this angle, and an angle f of 30 ° has also proven to be good in practice.
  • the circumferential angle of the blade front edge (between tip 8a and point 7a) assume practically any value between approximately 20 ° and 360 °. However, circumferential angles have proven to be particularly advantageous exposed between 90 ° and 270 °.
  • a longer fibrous part no longer needs to slide along the blade end edge 6 with its always relatively weak slope to the blade tip 8a in order to reach the area of the interacting shear edges 8, 9; rather, the fibrous part will slide off directly on the pressure-side flank 7 against the point 7a of the smallest Ra-5 dial spacing of the blade front edge 8 cut over the counter shear edge 9 on the housing wall while slipping over this point 7a; Even if several passes or revolutions of the impeller are required to completely cut the fibrous part, this happens considerably faster than if the complete slipping of the fibrous part along the blade end edge 6 had to be waited for.
  • the impeller of the centrifugal pump shown in FIGS. 6-10 has a conical hub 21 with a blade 25, the axis 33 of which passes through the pressure-side housing wall 23 designed as a truncated cone.
  • This end edge 28 extends from the blade outlet tip 35, into which the end edge 26 runs out, spirally over a relatively large corner to a point 31 at which it ends in the hub 21, which has a relatively small radius r.
  • Characterized ⁇ is over a relatively large arc of suitably between 30 ° and 90 0 is located between blade exit tip 35 and said hub body 31 exposed to a relatively large area of the housing wall 23rd
  • the exposure of the housing wall by reducing the impeller hub radius r can go so far as to meet the strength requirements conditions for power transmission from the drive shaft 33 through the impeller hub to the blade can still be responsible.
  • the width b of the exposed part of the rear housing wall which becomes visible between the pressure-side flank 27 and the suction-side flank 39 in the impeller delivery channel, decreases the more it extends against the impeller inlet part. This reduction in the width b in the direction of the impeller inlet takes place for reasons of the strength and stability of the blade end part.
  • the exposed part of the housing wall in the impeller conveying channel will have an arc ⁇ calculated from the impeller end edge tip 35 of, for example, at least 20 °, whereby certain impeller shapes can allow an arc of up to 180 °.
  • the end edge 28 can extend over a circumferential angle between 360 ° and 540 °.
  • An outlet opening 36 is provided in the housing wall 23 in the vicinity of the drive shaft, so that gases can escape which are carried in the conveying medium and which separate out against the impeller rotation center and reach the housing wall center through the uncovering of the impeller.
  • impeller hub 21 and the housing wall 23 form a labyrinth between the exposure of the impeller rear side and the interior 37 between the hub and the rear wall, where the outlet opening 36 is located, so that no entrained fixed parts get into the outlet opening.
  • the labyrinth structure is interrupted at least on the housing wall side (in FIG. 9 also on the hub side) by means of a transverse groove 38, so that a self-cleaning effect arises.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP83109755A 1982-12-22 1983-09-29 Roue à canal pour une pompe centrifuge Expired EP0114932B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH750582A CH660511A5 (en) 1982-12-22 1982-12-22 Centrifugal pump having a single-blade impeller
CH7505/82 1982-12-22
CH212183A CH662864A5 (en) 1983-04-20 1983-04-20 Centrifugal pump having an open-type single-blade impeller
CH2121/83 1983-04-20

Publications (2)

Publication Number Publication Date
EP0114932A1 true EP0114932A1 (fr) 1984-08-08
EP0114932B1 EP0114932B1 (fr) 1986-09-03

Family

ID=25689566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109755A Expired EP0114932B1 (fr) 1982-12-22 1983-09-29 Roue à canal pour une pompe centrifuge

Country Status (8)

Country Link
US (1) US4540334A (fr)
EP (1) EP0114932B1 (fr)
BR (1) BR8306883A (fr)
CA (1) CA1214687A (fr)
DE (1) DE3365881D1 (fr)
DK (1) DK154907C (fr)
ES (1) ES8501851A1 (fr)
FI (1) FI72577C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545005A (en) * 1993-07-16 1996-08-13 St+E,Uml A+Ee Hle; Martin Centrifugal pump
CN102536835A (zh) * 2012-03-21 2012-07-04 江苏大学 固液两相流螺旋离心泵
WO2019025238A1 (fr) * 2017-08-03 2019-02-07 KSB SE & Co. KGaA Roue mobile pour pompe à eaux usées

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778336A (en) * 1987-07-09 1988-10-18 Weil Pump Company Cutter pump subassembly
AU694679B2 (en) * 1995-07-10 1998-07-23 Jayden David Harman A rotor
WO1997003291A1 (fr) * 1995-07-10 1997-01-30 Jayden David Harman Rotor
US5997242A (en) * 1996-12-02 1999-12-07 Alden Research Laboratory, Inc. Hydraulic turbine
SE520416C2 (sv) * 1997-11-18 2003-07-08 Flygt Ab Itt Pumphjul
ATE307268T1 (de) 1999-11-25 2005-11-15 Jayden David Harman Ein- oder mehrblättriger propellerrotor
AUPR982502A0 (en) * 2002-01-03 2002-01-31 Pax Fluid Systems Inc. A heat exchanger
CN1612979B (zh) * 2002-01-03 2011-11-23 百思科技公司 涡环发生器
AUPR982302A0 (en) 2002-01-03 2002-01-31 Pax Fluid Systems Inc. A fluid flow controller
AU2003903386A0 (en) * 2003-07-02 2003-07-17 Pax Scientific, Inc Fluid flow control device
WO2005045258A1 (fr) * 2003-11-04 2005-05-19 Pax Scientific, Inc Systeme de circulation de liquide
CN1985093A (zh) * 2004-01-30 2007-06-20 百思科技公司 用于离心通风机、泵或涡轮机的机罩
JP4695097B2 (ja) * 2004-01-30 2011-06-08 パックス サイエンティフィック インコーポレイテッド 遠心ファン、ポンプまたはタービンのハウジング
JP2006132417A (ja) * 2004-11-05 2006-05-25 Toshiba Tec Corp ポンプ
WO2008042251A2 (fr) 2006-09-29 2008-04-10 Pax Streamline, Inc. Ventilateur hélicoïdal
US20090308472A1 (en) * 2008-06-15 2009-12-17 Jayden David Harman Swirl Inducer
US8506236B2 (en) * 2009-08-03 2013-08-13 Ebara International Corporation Counter rotation inducer housing
WO2011017372A1 (fr) * 2009-08-03 2011-02-10 Ebara International Corporation Inducteur à étages multiples pour pompes centrifuges
US8550771B2 (en) * 2009-08-03 2013-10-08 Ebara International Corporation Inducer for centrifugal pump
US9968810B2 (en) * 2010-02-19 2018-05-15 Leonard E. Doten Bucket supported polymer gel emulsion preparation system
WO2013120049A1 (fr) 2012-02-10 2013-08-15 Randy Dixon Pompe à lobes avec lames racleuses
US10273970B2 (en) * 2016-01-27 2019-04-30 John A. Kozel Construction of articles of manufacture of fiber reinforced structural composites
CN110425178A (zh) * 2019-06-27 2019-11-08 山西天海给排水设备有限公司 一种高效无堵塞螺旋离心泵叶轮的几何参数的设计算法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959710A (en) * 1931-09-21 1934-05-22 Chicago Pump Co Pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US2845870A (en) * 1955-04-22 1958-08-05 Borg Warner Fuel booster pump
US3028140A (en) * 1957-06-17 1962-04-03 James R Lage Rotary fluid flow machine having rotor vanes constructed according to three dimensional calculations
DE1528890A1 (de) * 1965-08-14 1970-01-29 August Wuebker & Soehne Ohg Ma Vertikalpumpe fuer Jauchegruben
CH633617A5 (de) * 1978-08-31 1982-12-15 Martin Staehle Kreiselpumpe mit einschaufel-laufrad zur foerderung von langfaserigen aufgeschwemmten feststoffen.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959710A (en) * 1931-09-21 1934-05-22 Chicago Pump Co Pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545005A (en) * 1993-07-16 1996-08-13 St+E,Uml A+Ee Hle; Martin Centrifugal pump
CN102536835A (zh) * 2012-03-21 2012-07-04 江苏大学 固液两相流螺旋离心泵
CN102536835B (zh) * 2012-03-21 2014-04-09 江苏大学 固液两相流螺旋离心泵
WO2019025238A1 (fr) * 2017-08-03 2019-02-07 KSB SE & Co. KGaA Roue mobile pour pompe à eaux usées
US11603855B2 (en) 2017-08-03 2023-03-14 KSB SE & Co. KGaA Impeller for wastewater pump
AU2018310551B2 (en) * 2017-08-03 2023-11-23 KSB SE & Co. KGaA Impeller for wastewater pump

Also Published As

Publication number Publication date
DE3365881D1 (en) 1986-10-09
FI834352A0 (fi) 1983-11-28
ES528338A0 (es) 1984-12-01
EP0114932B1 (fr) 1986-09-03
DK154907C (da) 1989-06-12
CA1214687A (fr) 1986-12-02
DK582683A (da) 1984-06-23
DK154907B (da) 1989-01-02
DK582683D0 (da) 1983-12-16
BR8306883A (pt) 1984-07-31
FI72577C (fi) 1987-06-08
US4540334A (en) 1985-09-10
ES8501851A1 (es) 1984-12-01
FI72577B (fi) 1987-02-27
FI834352A (fi) 1984-06-23

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