EP1538339A1 - Radialpumpe - Google Patents
Radialpumpe Download PDFInfo
- Publication number
- EP1538339A1 EP1538339A1 EP04450193A EP04450193A EP1538339A1 EP 1538339 A1 EP1538339 A1 EP 1538339A1 EP 04450193 A EP04450193 A EP 04450193A EP 04450193 A EP04450193 A EP 04450193A EP 1538339 A1 EP1538339 A1 EP 1538339A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover ring
- radial pump
- housing
- impeller
- ring
- 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
Links
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000465 moulding 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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0027—Varying behaviour or the very pump
- F04D15/0033—By-passing by increasing clearance between impeller and its casing
Definitions
- the invention relates to a radial pump with a housing in which a is rotatably supported by a shaft driven impeller, with a on the Suction side of the impeller in the housing axially in the direction of the impeller axis between two end positions slidably mounted cover ring, wherein by moving the Cover ring from a limited by a housing stop first end position a gap formed between the impeller and the housing is releasable, wherein the Cover ring automatically depending on the pressure difference between pressure and Suction side of the impeller is adjustable.
- cooling water pumps of internal combustion engines are designed that even at relatively low engine speeds high coolant flows can be provided.
- the delivered volume flow but also the power consumption of the pump much higher than required, which has a negative effect on fuel consumption. Apart from this, It can come in the high speed range to cavitation phenomena.
- From DE 41 42 120 A1 is a cooling water pump for an internal combustion engine known.
- a displaceable in the axial direction Inserted cover ring In one between a water-carrying channel and a water pump housing arranged opening is a displaceable in the axial direction Inserted cover ring.
- the cover ring is by a pressure box exhibiting Adjustable actuator in dependence on parameters of the internal combustion engine. Due to the displacement of the cover ring is the width of a gap between the Ring and the impeller of the water pump variable, so that the cooling water flow rate is changeable. This allows the warm-up phase of the internal combustion engine to shorten and reduce the amount of harmful exhaust gas constituents.
- US 2,786,420 A describes a radial pump, wherein by means of a Pressure box a cover ring depending on the pressure difference between pressure and Suction side can be adjusted.
- the object of the invention is the simplest possible way the flow rate and to reduce the power consumption at high speeds while a to ensure stable operation.
- the cover ring in at least one defined position, preferably at least in the first end position, by a preferably positioned by a locking device positioning positioned is.
- This allows fluttering of the bezel in certain Speed ranges, which is a cyclic opening and closing of the gap between Case and impeller cause would be prevented.
- the positioning at least one has spring-loaded pressure body approximately radially with respect to the impeller axis, which cooperates in the defined position with a reciprocally shaped locking element and slidably disposed along a guide surface, wherein the latching element is preferably formed by a recess in the guide surface is.
- the Guide surface is formed by a suction-side inner surface of the housing and the pressure body is arranged in the jacket area of the cover ring.
- the guide surface is formed by the shell region of the cover ring and that the pressure body is arranged in the region of a suction chamber-side inner surface of the housing.
- the guide surface with respect to the impeller axis by an angle smaller than about 20 °, preferably less than about 10 ° is inclined.
- a pressure spring acting on the pressure body can be in a radial bore be arranged of the cover ring or the housing.
- the pressure body has a convex surface.
- the short-circuit channel can be formed by at least one molding in the housing and / or be formed in the cover ring.
- the short-circuit channel is thereby by the Decking is controlled and designed so that the flow area with the deflection of the bezel increases. This ensures that in the upper Speed range are controlled relatively large flow rates, causing the Power consumption of the radial pump significantly reduced in this operating range can be.
- the gap between the impeller and housing is independent of the adjusted current impeller speed, thereby eliminating complex actuators can.
- an at least formed by a return element restoring force in the direction of the first End position acts on the cover ring.
- the return element by a resilient biasing means, preferably a return spring, is formed, which acts in the direction of the impeller axis on the cover ring.
- the radial pump 1 has a housing 2, in which a shaft 3 for driving an impeller 4 is rotatably supported by a bearing 5.
- the suction side the radial pump 1 is denoted by reference numeral 6, the pressure side by reference numeral 7th designated.
- Around the impeller 4 around the housing 2 forms a spiral channel. 8 out.
- On the suction side 6 of the impeller 4 is in the housing 2, a cover ring 9 in Direction of the impeller axis 10 between a first and a second end position slidably arranged. In the first end position shown in Fig. 1 is a formed between the impeller 4 and housing 2 gap 11 through the cover ring. 9 obscured, so that leakage flows between the pressure side 7 and suction side 6 prevented become.
- the cover ring 9 is replaced by at least one return element 12 in the first end position moved or held in this.
- the return element shown in Fig. 2 12 consists of a formed by a spring plate return spring 14, which acts in the axial direction on the cover ring 9.
- the positioning element shown in Fig. 3 13 is arranged in the jacket region 15 of the cover ring 9 and has a by a compression spring 16 spring-loaded pressure body 17, wherein the compression spring 16 arranged in a radial bore 18 in the jacket region 15 of the cover ring 9 is.
- the pressure body 17 may, for example, by a ball or Hemisphere 17a be formed.
- the pressure body 17 is located on a suction side Inner surface 2a of the housing 2 formed guide surface 19 and slides at axial deflection of the cover ring along this, wherein the Pressure element 17 in the first end position in a formed by a recess 20 Form element engages and thus stabilizes the position of the cover ring 9.
- the guide surface 19 with respect to the impeller axis 10 is slightly inclined formed, wherein the angle ⁇ between the guide surface 19 and the Impeller shaft 10 is less than about 10 °.
- the cover ring 9 In the first end position is the cover ring 9 on a stop 21 formed by the housing 2.
- the cover ring 9 is moved in response to the pressure difference between the pressure p 2 of the pressure side 7 and the pressure p 1 of the suction side 6 from the first end position determining a rest position in the second end position.
- the cover ring 9 Up to a predefined rotational speed of the impeller 4, which is associated with a certain flow rate, the cover ring 9 is positioned in the first end position shown in Fig. 1 with a very small gap 11 with respect to the impeller 4, so that an optimum efficiency is achieved.
- This position is defined on the one hand by the stop 21 in the housing, on the other hand by the return element 12 and the positioning element 13.
- the return element 12 and the positioning element 13 can also be used in combination in order to ensure a demand-oriented control characteristic.
- the reset and positioning elements 12, 13 are designed so that at a certain pressure difference p 2 - p 1, an axial displacement of the cover ring 9 takes place away from the impeller 4. Depending on the design of the reset and positioning elements 12, 13, this axial adjustment can take place continuously or abruptly above a certain speed.
- the increasing axial gap 11 between the impeller 4 and cover ring 9 causes a reduction of the flow rate and thereby a reduction of the Power consumption at high speeds. Furthermore, the high speed range prevents cavitation occurring.
- FIG. 4 and FIG. 5 show an embodiment in which the pressure body 17 is formed by a spring ring 17b (Fig. 6), which in a circumferential Ring groove 22 of the cover ring 9 is arranged.
- the housing 2 has at least one short-circuit channel 23, which in the deflection of the cover ring 9 shown in Fig. 5, the flow connection according to the arrow S between the pressure side 7 and suction side 6 of the radial pump 1 allows.
- the shorting channel 23 is defined by an edge 24 of the Deckringes 9 is controlled and is designed so that the flow cross-section increases with the size of the deflection of the cover ring 9. This will be added high speeds relatively large amounts of the pumped medium.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- Fig. 1
- eine erfindungsgemäße Radialpumpe in einem Längsschnitt in einer ersten Ausführungsvariante,
- Fig. 2
- das Detail II aus Fig. 1,
- Fig. 3
- das Detail III aus Fig. 1,
- Fig. 4
- eine erfindungsgemäße Radialpumpe gemäß dem Detail aus Fig. 3 in einer zweiten Ausführungsvariante in einer Ruhstellung des Deckringes,
- Fig. 5
- ein Detail gemäß Fig. 4 in einer Auslenkstellung des Deckringes, und
- Fig. 6
- ein Positionselement in einer Ausführungsvariante.
Claims (13)
- Radialpumpe (1) mit einem Gehäuse (2), in welchem ein durch eine Welle (3) angetriebenes Laufrad (4) drehbar gelagert ist, mit einem auf der Saugseite (6) des Laufrades (4) im Gehäuse (2) axial in Richtung der Laufradachse (10) zwischen zwei Endlagen verschiebbar gelagerten Deckring (9), wobei durch Verschieben des Deckringes (9) aus einer durch einen Gehäuseanschlag (21) begrenzten ersten Endlage ein zwischen Laufrad (4) und Gehäuse (2) ausgebildeter Spalt (11) freigebbar ist, wobei der Deckring (9) selbsttätig in Abhängigkeit der Druckdifferenz zwischen Druck- und Saugseite (7, 6) des Laufrades (4) verstellbar ist, dadurch gekennzeichnet, dass der Deckring (9) in zumindest einer definierten Lage, vorzugsweise zumindest in der ersten Endlage, durch ein vorzugsweise durch zumindest eine Rasteinrichtung gebildetes Positionierelement (13) positionierbar ist.
- Radialpumpe (1) nach Anspruch 1, dadurch gekennzeichnet, dass auf den Deckring (9) eine zumindest durch ein Rückstellelement (12) gebildete Rückstellkraft in Richtung der ersten Endlage einwirkt.
- Radialpumpe (1) nach Anspruch 2, dadurch gekennzeichnet, dass das Rückstellelement (12) durch eine elastische Vorspanneinrichtung, vorzugsweise eine Rückstellfeder (14), gebildet ist, welche in Richtung der Laufradachse (10) auf den Deckring (9) einwirkt.
- Radialpumpe (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Positionierelement (13) zumindest einen etwa radial bezüglich der Laufradachse (10) federbelasteten Druckkörper (17) aufweist, welcher in der definierten Lage mit einem reziprok geformten Rastelement zusammenwirkt und entlang einer Führungsfläche (19) gleitbar angeordnet ist, wobei das Rastelement vorzugsweise durch eine Einbuchtung (20) in der Führungsfläche (19) gebildet ist.
- Radialpumpe (1) nach Anspruch 4, dadurch gekennzeichnet, dass zumindest eine auf den Druckkörper (17) einwirkende Druckfeder (16) in einer radialen Bohrung (18) des Deckringes (9) oder des Gehäuses (2) angeordnet ist.
- Radialpumpe (1) nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der Druckkörper (17) eine konvexe Oberfläche aufweist.
- Radialpumpe (1) nach Anspruch 4, dadurch gekennzeichnet, dass der Druckkörper (17) durch einen Federring (17b) gebildet ist.
- Radialpumpe (1) nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Führungsfläche (19) durch eine saugseitige Innenfläche (2a) des Gehäuses (2) gebildet ist und der Druckkörper (17) im Mantelbereich (15) des Deckringes (9) angeordnet ist.
- Radialpumpe (1) nach Anspruch 4 bis 7, dadurch gekennzeichnet, dass die Führungsfläche (19) durch den Mantelbereich (15) des Deckringes (9) gebildet ist und dass der Druckkörper (17) im Bereich einer saugraumseitigen Innenfläche (2a) des Gehäuses (2) angeordnet ist.
- Radialpumpe (1) nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Führungsfläche (19) bezüglich der Laufradachse (10) um einen Winkel (α) kleiner als etwa 20°, vorzugsweise kleiner als etwa 10° geneigt ist.
- Radialpumpe (1) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass im Bereich des Deckringes (9) zumindest ein Kurzschlusskanal (23) angeordnet ist.
- Radialpumpe (1) nach Anspruch 11, dadurch gekennzeichnet, dass der Kurzschlusskanal (23) durch zumindest eine Ausformung im Gehäuse (2) und/oder im Deckring (9) gebildet ist.
- Radialpumpe (1) nach Anspruch 11, dadurch gekennzeichnet, dass der Kurzschlusskanal (23) durch den Deckring (9) aufgesteuert wird und so gestaltet ist, dass der Durchflussquerschnitt mit der Auslenkung des Deckringes (9) zunimmt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20040450193 EP1538339B1 (de) | 2003-12-04 | 2004-10-14 | Radialpumpe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03450273A EP1538338B1 (de) | 2003-12-04 | 2003-12-04 | Radialpumpe |
| EP03450273 | 2003-12-04 | ||
| EP20040450193 EP1538339B1 (de) | 2003-12-04 | 2004-10-14 | Radialpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1538339A1 true EP1538339A1 (de) | 2005-06-08 |
| EP1538339B1 EP1538339B1 (de) | 2006-11-22 |
Family
ID=34466362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040450193 Expired - Lifetime EP1538339B1 (de) | 2003-12-04 | 2004-10-14 | Radialpumpe |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1538339B1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009026322A1 (en) * | 2007-08-22 | 2009-02-26 | Mp Pumps Inc. | Self priming centrifugal pump |
| WO2014086472A1 (de) * | 2012-12-05 | 2014-06-12 | Wilo Se | Kreiselpumpe insbesondere für abwasser oder schmutzwasser |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2470565A (en) * | 1945-10-09 | 1949-05-17 | Ingersoll Rand Co | Surge preventing device for centrifugal compressors |
| US2786420A (en) * | 1952-03-27 | 1957-03-26 | Stanley G Harwood | Pressure controlled pump |
| FR2681906A1 (fr) * | 1991-09-27 | 1993-04-02 | Renault Vehicules Ind | Pompe centrifuge pour circuit de liquide de refroidissement de moteur a combustion. |
| DE4142120A1 (de) * | 1991-12-20 | 1993-06-24 | Porsche Ag | Kuehlwasserpumpe fuer eine brennkraftmaschine |
-
2004
- 2004-10-14 EP EP20040450193 patent/EP1538339B1/de not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2470565A (en) * | 1945-10-09 | 1949-05-17 | Ingersoll Rand Co | Surge preventing device for centrifugal compressors |
| US2786420A (en) * | 1952-03-27 | 1957-03-26 | Stanley G Harwood | Pressure controlled pump |
| FR2681906A1 (fr) * | 1991-09-27 | 1993-04-02 | Renault Vehicules Ind | Pompe centrifuge pour circuit de liquide de refroidissement de moteur a combustion. |
| DE4142120A1 (de) * | 1991-12-20 | 1993-06-24 | Porsche Ag | Kuehlwasserpumpe fuer eine brennkraftmaschine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009026322A1 (en) * | 2007-08-22 | 2009-02-26 | Mp Pumps Inc. | Self priming centrifugal pump |
| WO2014086472A1 (de) * | 2012-12-05 | 2014-06-12 | Wilo Se | Kreiselpumpe insbesondere für abwasser oder schmutzwasser |
| CN104903584A (zh) * | 2012-12-05 | 2015-09-09 | 威乐欧洲股份公司 | 特别是用于废水或污水的离心泵 |
| CN104903584B (zh) * | 2012-12-05 | 2017-07-14 | 威乐欧洲股份公司 | 用于废水或污水的离心泵 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1538339B1 (de) | 2006-11-22 |
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