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EP0640768B1 - Rouet à canal unique pour pompes centrifuges - Google Patents

Rouet à canal unique pour pompes centrifuges Download PDF

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Publication number
EP0640768B1
EP0640768B1 EP94112033A EP94112033A EP0640768B1 EP 0640768 B1 EP0640768 B1 EP 0640768B1 EP 94112033 A EP94112033 A EP 94112033A EP 94112033 A EP94112033 A EP 94112033A EP 0640768 B1 EP0640768 B1 EP 0640768B1
Authority
EP
European Patent Office
Prior art keywords
blade
profile
basic
thickened part
impeller according
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.)
Expired - Lifetime
Application number
EP94112033A
Other languages
German (de)
English (en)
Other versions
EP0640768A1 (fr
Inventor
Wolfgang Metzinger
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Publication of EP0640768A1 publication Critical patent/EP0640768A1/fr
Application granted granted Critical
Publication of EP0640768B1 publication Critical patent/EP0640768B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

  • the invention relates to an impeller for centrifugal pumps Pumping liquids containing solids, in particular for pumping dirty water with long-fiber Ingredients, with a front cover, a rear Cover plate and a blade arranged between them, which together form a channel, the blade, with Exception of the beginning of the blade, one over its entire course has a thin basic blade profile, and at the beginning of the Bucket a thickening on the pressure side is arranged, the dimension of which corresponds at least to the thickness of the basic blade profile, while the radius of the blade head is at least half of the formed by the basic blade profile and the thickening Dimension corresponds.
  • DE-A-40 15 331 is a blockage-promoting Bucket wheel known, the advantages of which in terms of mechanical imbalance and hydrodynamic buoyancy balanced design. Another advantage results by reducing one possible in the inlet area Cavitation to an innocuous minimum. These properties are achieved with a comparatively uncomplicated form of blade and impeller.
  • the transition between the suction side and the Pressure side of the blade-forming blade head has a rounding radius, which is much larger than half the blade thickness; in special cases, the blade head forms a flat surface.
  • the bucket suction side of the known bucket wheel preferably on the first 180 ° of the angle of rotation is arranged concentrically to the axis of rotation semicircle the pressure side designed so that the scoop one to the outlet has steadily decreasing thickness.
  • US-A-1 864 834 and US-A-1 959 710 are two known other examples of centrifugal pump blades, which a thin base profile and a thickened blade head have.
  • the thickening is on the blade pressure side arranged, their size exceeds in the first-mentioned font the dimension of the basic blade profile by far.
  • the radius of the The blade head corresponds to about half in both fonts of the formed by the basic blade profile and the thickening Measure. In both cases, however, it is about Two-bladed impellers, for that with single-bladed impellers existing problem of asymmetrical mass distribution does not consists.
  • the invention has for its object the manufacture of Simplify paddle wheels of the type mentioned and the possibility of further weight reduction too create.
  • the object is achieved according to the invention by a two-part design of blade base profile and thickening.
  • the invention is limited not on this embodiment; it is also with differently designed blades can be used.
  • the thickening at the beginning of the blade and its transition to Basic profile of the shovel can come in different shapes and can be realized by different means.
  • the Subclaims list some preferred designs.
  • the two-part design of the base profile and bucket leaves among other things in a production in sheet metal construction use, which results in a reduction in weight.
  • the advantage of weight reduction can also be found in Use of other materials, for example one from Use plastic-made thickening.
  • the thickening must also do not consist of a compact component; since it's on theirs flow-guiding function arrives, it can also by a open or closed guide profile, for example from Sheet metal.
  • For the effect of through the The thickened outer contour has no negative Influence when between the basic blade profile and the Thickening a gap is present. The through the gap on the Flow in the area of the blade head can have an influence however, to improve co-funding more firmly Components are used.
  • the cast paddle wheel of FIGS. 1 and 2 has one front cover 1, a rear cover 2 and one Bucket 3. These parts become one between them enclosed channel 4 formed between the inlet 5 and the outlet 6 of the paddle wheel.
  • the shovel 3 has a suction side 7 and a pressure side 8.
  • the blade 3 consists of a basic profile 9 of continuous constant thickness and one arranged at the beginning of the blade Thickening 10, which from an attached to the basic profile 9 compact body.
  • the through the basic profile 9 and the Thickening 10 together formed blade head 11 has something more than twice the thickness of the basic profile 9, it is flat trained and has rounded transitions to the suction side 7 and to the pressure side 8.
  • the flattening of the blade head 11 prevents the accumulation of long-fiber components of the Medium.
  • the suction side 7 of the blade 3 describes at first 180 ° of the angle of rotation of the blade 3 concentric with the axis of rotation of the paddle wheel arranged semicircle.
  • Print page 8 also a concentric semicircle around Rotation axis of the paddle wheel.
  • the one at the semicircular area subsequent outlet area of the blade 3 has a positive blade angle.
  • the variant shown in FIG. 4 also has one Thickening at the beginning of the blade, but here by a contour-forming guide profile 14 is formed, which is made of sheet metal consists.
  • a contour-forming guide profile 14 is formed, which is made of sheet metal consists.
  • the guide profile 14 without a gap 12 with the base profile 9 get connected.
  • the embodiment of Fig. 4 has opposite the explanations of the previous figures the advantage of a further weight and unbalance reduction.

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)

Claims (11)

  1. Rouet à canal unique pour pompes centrifuges pour le refoulement de liquides chargés de matière solide, en particulier pour le refoulement d'eau sale avec des éléments à longues fibres, avec un plateau de recouvrement avant (1), un plateau de recouvrement arrière (2) et une aube (3) disposée entre ceux-ci, qui forment conjointement un canal (4), l'aube (3) possédant un profil de base en aube fin sur toute sa longueur à l'exception du début de l'aube, et un épaississement (10), dont la dimension (10) correspondant au moins à l'épaisseur du profil de base en aube (9), étant disposé du côté de la pression au début de l'aube (3) alors que le rayon de la tête de l'aube (11) correspond au moins à la moitié de la dimension constituée par le profil de base en aube (9) et l'épaississement (10), caractérisé par une réalisation en deux parties du profil de base en aube (9) et de l'épaississement (10).
  2. Rouet à canal unique selon la revendication 1, caractérisé par une transition continue de l'épaississement (10) au profil de base en aube (9).
  3. Rouet à canal unique selon la revendication 2, caractérisé en ce que la transition suit une tangente (13) menée au profil de base en aube (9).
  4. Rouet à canal unique selon la revendication 1, caractérisé en ce que la transition de l'épaississement au profil de base en aube (9) a lieu sous la forme d'un bord de fuite.
  5. Rouet à canal unique selon la revendication 1, caractérisé en ce que l'épaississement (10) avec sa transition au profil de base (9) s'étend sur un secteur angulaire de Δϕ ≤ 90°, ϕ = 0° correspondant à un rayon tangent à la tête de l'aube (11).
  6. Rouet à canal unique selon la revendication 5, caractérisé en ce que l'épaississement (10) sans sa transition au profil de base (9) s'étend sur un secteur angulaire de Δϕ ≤ 40°.
  7. Rouet à canal unique selon la revendication 1, caractérisé en ce que l'épaississement (10) est constitué d'un corps compact.
  8. Rouet à canal unique selon la revendication 7, caractérisé en ce que l'épaississement (10) est constitué d'un autre matériau que le profil de base en aube (9).
  9. Rouet à canal unique selon la revendication 1, caractérisé en ce que l'épaississement est créé par un profil de guidage (14) formant un contour.
  10. Rouet à canal unique selon la revendication 9, caractérisé en ce que le profil de guidage (14) est constitué de tôle.
  11. Rouet à canal unique selon la revendication 1 ou 9, caractérisé par une fente (12) entre le profil de base en aube (9) et l'épaississement (10, 14).
EP94112033A 1993-08-24 1994-08-02 Rouet à canal unique pour pompes centrifuges Expired - Lifetime EP0640768B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4328396 1993-08-24
DE4328396A DE4328396A1 (de) 1993-08-24 1993-08-24 Einschaufelrad für Kreiselpumpen

Publications (2)

Publication Number Publication Date
EP0640768A1 EP0640768A1 (fr) 1995-03-01
EP0640768B1 true EP0640768B1 (fr) 1998-01-28

Family

ID=6495866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112033A Expired - Lifetime EP0640768B1 (fr) 1993-08-24 1994-08-02 Rouet à canal unique pour pompes centrifuges

Country Status (2)

Country Link
EP (1) EP0640768B1 (fr)
DE (2) DE4328396A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106795892A (zh) * 2014-08-26 2017-05-31 Ihc荷兰Ie有限公司 具有不对称厚度的叶轮叶片

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19521768A1 (de) * 1995-06-19 1997-01-02 Wilo Gmbh Pumpenlaufrad
EP2711557B1 (fr) * 2012-09-20 2019-10-02 Sulzer Management AG Rotor pour pompe centrifuge
DE102012023731B4 (de) * 2012-12-05 2021-03-11 Wilo Se Kreiselpumpe insbesondere für Abwasser oder Schmutzwasser
CN104632695B (zh) * 2015-01-09 2017-02-01 江苏大学 一种降低流体诱导振动的单叶片泵叶轮

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1864834A (en) * 1927-12-28 1932-06-28 Buffalo Steam Pump Company Centrifugal pump impeller
US1959710A (en) * 1931-09-21 1934-05-22 Chicago Pump Co Pump
FR1274289A (fr) * 1960-11-29 1961-10-20 Pompe centrifuge comportant un rotor à conduit unique
US3743437A (en) * 1972-04-14 1973-07-03 Cornell Mfg Co Pump impeller with skirt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106795892A (zh) * 2014-08-26 2017-05-31 Ihc荷兰Ie有限公司 具有不对称厚度的叶轮叶片

Also Published As

Publication number Publication date
EP0640768A1 (fr) 1995-03-01
DE4328396A1 (de) 1995-03-02
DE59405160D1 (de) 1998-03-05

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