EP0640768B1 - Einschaufelrad für Kreiselpumpen - Google Patents
Einschaufelrad für Kreiselpumpen Download PDFInfo
- 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
Links
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
- 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)
Description
- Fig. 1
- einen Axialschnitt durch ein erfindungsgemäßes Einschaufelrad, in
- Fig. 2
- einen Radialschnitt durch das Laufrad der Fig. 1, in
- Fig. 3
- einen erfindungsgemäß gestalteten Schaufelanfang in Einzeldarstellung, und in
- Fig. 4
- einen erfindungsgemäßen, durch ein Leitprofil gebildeten Schaufelanfang in Einzeldarstellung.
Claims (11)
- Einschaufelrad für Kreiselpumpen zur Förderung von feststoffbeladenen Flüssigkeiten, insbesondere zur Förderung von Schmutzwasser mit langfaserigen Bestandteilen, mit einer vorderen Deckscheibe (1), einer hinteren Deckscheibe (2) und einer zwischen diesen angeordneten Schaufel (3), welche gemeinsam einen Kanal (4) bilden, wobei die Schaufel (3), mit Ausnahme des Schaufelanfangs, ein über ihren gesamten Verlauf dünnes Schaufelgrundprofil (9) besitzt, und wobei am Anfang der Schaufel (3) eine druckseitige Verdickung (10) angeordnet ist, deren Maß mindestens der Dicke des Schaufelgrundprofils (9) entspricht, während der Radius des Schaufelkopfes (11) mindestens der Hälfte des durch das Schaufelgrundprofil (9) und die Verdickung (10) gebildeten Maßes entspricht, gekennzeichnet durch eine zweiteilige Ausführung von Schaufelgrundprofil (9) und Verdickung (10).
- Einschaufelrad nach Anspruch 1, gekennzeichnet durch einen kontinuierlich verlaufenden Übergang der Verdickung (10) zum Schaufelgrundprofil (9).
- Einschaufelrad nach Anspruch 2, dadurch gekennzeichnet, daß der Übergang einer an das Schaufelgrundprofil (9) angelegten Tangente (13) folgt.
- Einschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß der Übergang der Verdickung zum Schaufelgrundprofil (9) in Form einer Abreißkante erfolgt.
- Einschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung (10) und ihr Übergang zum Grundprofil (9) über einen Winkelsektor von Δϕ ≤ 90° reicht, wobei ϕ = 0° ein den Schaufelkopf (11) tangierender Radialstrahl ist.
- Einschaufelrad nach Anspruch 5, dadurch gekennzeichnet, daß die Verdickung (10) ohne ihren Übergang zum Grundprofil (9) über einen Winkelsektor von Δϕ ≤ 40° reicht.
- Einschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung (10) aus einem kompakten Körper besteht.
- Einschaufelrad nach Anspruch 7, dadurch gekennzeichnet, daß die Verdickung (10) aus einem anderen Material besteht als das Schaufelgrundprofil (9).
- Einschaufelrad nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung durch ein konturbildendes Leitprofil (14) erzeugt wird.
- Einschaufelrad nach Anspruch 9, dadurch gekennzeichnet, daß das Leitprofil (14) aus Blech besteht.
- Einschaufelrad nach Anspruch 1 oder 9, gekennzeichnet durch einen Spalt (12) zwischen dem Schaufelgrundprofil (9) und der Verdickung (10, 14).
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 (de) | 1995-03-01 |
EP0640768B1 true EP0640768B1 (de) | 1998-01-28 |
Family
ID=6495866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94112033A Expired - Lifetime EP0640768B1 (de) | 1993-08-24 | 1994-08-02 | Einschaufelrad für Kreiselpumpen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0640768B1 (de) |
DE (2) | DE4328396A1 (de) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19521768A1 (de) * | 1995-06-19 | 1997-01-02 | Wilo Gmbh | Pumpenlaufrad |
EP2711557B1 (de) * | 2012-09-20 | 2019-10-02 | Sulzer Management AG | Flügelrad für eine Zentrifugalpumpe |
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)
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 |
-
1993
- 1993-08-24 DE DE4328396A patent/DE4328396A1/de not_active Withdrawn
-
1994
- 1994-08-02 EP EP94112033A patent/EP0640768B1/de not_active Expired - Lifetime
- 1994-08-02 DE DE59405160T patent/DE59405160D1/de not_active Expired - Fee Related
Cited By (1)
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 (de) | 1995-03-01 |
DE4328396A1 (de) | 1995-03-02 |
DE59405160D1 (de) | 1998-03-05 |
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