EP4374080A1 - Schaufelanordnung mit mikroschaufeln - Google Patents
Schaufelanordnung mit mikroschaufelnInfo
- Publication number
- EP4374080A1 EP4374080A1 EP22744200.1A EP22744200A EP4374080A1 EP 4374080 A1 EP4374080 A1 EP 4374080A1 EP 22744200 A EP22744200 A EP 22744200A EP 4374080 A1 EP4374080 A1 EP 4374080A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segments
- centrifugal pump
- pump according
- carrier unit
- ring sections
- 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.)
- Pending
Links
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
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- 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
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Definitions
- the invention relates to a centrifugal pump with a blade arrangement, the blade arrangement having a support unit on which the blades are arranged.
- a central component of a centrifugal pump is the impeller, which transmits the mechanical energy as an impulse to the fluid to be pumped.
- the shape of the impeller determines how the flow exits the pump.
- the impeller blades are connected to one disc on each side.
- the impellers can be divided into different impeller shapes.
- Centrifugal pumps often also have control devices.
- Guide devices usually have guide vanes and form guide channels for the conveying medium between two guide vanes.
- Such guide devices can be designed as guide wheels.
- Pumped medium escaping from the impeller enters the guide device. In the Leitein direction, kinetic energy is converted into pressure energy. Furthermore, a deflection of the medium takes place. If necessary, the swirl is reduced for an inflow into a following impeller.
- the blades of a centrifugal pump are connected to the impeller in a fixed or adjustable manner and are the most important component for transferring mechanical power into flow rate or for converting speed and pressure energy.
- the vane is bounded in flow direction by the leading edge, also known as the suction edge, and the trailing edge, commonly known as the pressure edge, transverse to the flow direction on the inside by the hub or inner shroud and on the outside by the pump casing or outer shroud.
- the blade surfaces represent flow surfaces that are composed of streamlines that are infinitely close together.
- the velocity triangles on a streamline at the blade inlet and outlet determine the shape of the blades, taking into account the blade thickness.
- the course of the blade center line between the blade inlet and outlet is called the mean line. It is very often described by an arc of a circle, but also by an arc of a parabola, an S-curve, and other analytical curves.
- the blade inlet is designed as a shock-free inlet with a swirl-free inflow.
- the vane angle at the outlet depends e.g. more or less steep from the head to be realized. In the case of blades of radial impellers, it is usually less than 90°. In this case, the blade is referred to as backward curved.
- a blade angle of 90° denotes the radially ending blade and a blade angle greater than 90° denotes the forward curved blade.
- the minimum blade thickness for cast iron is about 3 mm, for cast steel 4 mm and in special cases such as inserted or welded sheet metal blades thinner blade thicknesses can also be implemented.
- DE 102015212203 A1 describes an impeller for a centrifugal pump, the blades of which are arranged in the form of bundles. This achieves an increase in the conveying capacity while at the same time ensuring a large ball passage.
- DE 102015213451 A1 describes profile shapes that result from the superimposition of a characteristic skeleton line with a negative blade entrance angle together with a thickness distribution or a profile drop. This achieves an evenly distributed load on the blade flanks.
- DE 102011 007907 B3 also describes a blade contour which, due to its contour, is subjected to a uniform load. This is achieved by a strongly curved blade contour that starts at an angle of less than 0°.
- the object of the invention is to specify a centrifugal pump with an optimized flow guide.
- the impeller should be able to be designed individually and customer-oriented.
- the impeller should also be able to be realized simply and inexpensively.
- the impeller should be as simple as possible to assemble and easily recyclable after use.
- the blades are subdivided into segments and the carrier unit is divided into radially adjoining ring sections.
- the segments in the ring sections are offset from one another.
- the segments can be designed in the form of micro-blades.
- a blade arrangement is understood to mean an arrangement for energy transmission or for energy conversion in turbomachines such as a centrifugal pump.
- a blade arrangement can be designed as a guide device and/or as an impeller.
- Such a guide device and/or such an impeller is divided into radially adjoining ring sections, wherein cut segments are arranged on the ring sections. These segments are ideally designed as micro blades.
- the segments are offset from one another.
- the segments are arranged offset from one another in the circumferential direction, so that the fluid to be conveyed flows radially from segment to segment and experiences a pulse transmission in the process.
- the segmented blades are only interrupted by gaps.
- the segments can be distributed very differently, in particular arranged symmetrically or asymmetrically, with the same length and curvature or with a completely individual design.
- a carrier unit is divided into more than two, preferably more than three, in particular more than four, ring sections and/or fewer than ten, preferably less than eight, in particular fewer than six, ring sections.
- the optimum arrangement of the segments which are preferably formed on a carrier unit by a generative process, can easily be implemented with computer support.
- the annulus width designed the same or differently for all ring sections, depending on the individual optimization of the pump hydraulics.
- the annular width is more than 5%, preferably more than 10%, in particular more than 15%, and/or less than 45%, preferably less than 40%, in particular less than 30%, of the carrier unit radius.
- the segments can be ideally positioned and designed using ring sections.
- the segments are preferably arranged within a ring section.
- the segments can extend over the entire width of a ring section or be arranged within a ring section at a distance from the delimiting circular rings.
- the segments can also extend over at least two ring sections in an overlapping manner. Depending on the size or length of a segment, the segment length extends up to 50% over two ring sections.
- the segments are designed as central segments and/or suction edge segments and/or pressure edge segments, depending on their arrangement on the ring sections.
- the shape of the segments, the angle of curvature, the length, the height and the thickness can be individually adapted to the load situation determined in each case.
- the segments can be individually designed depending on the assignment of a ring section. It is also conceivable that each individual segment is individually adapted and optimized to the flow situation.
- the segments on the carrier unit are preferably aligned in the meridian direction.
- the segments can be arranged in a row and/or offset from one another.
- the segments have a rectilinear shape and/or a radial shape outward curved shape. All segments can have the same curvature, or have the same curvature within a ring section, be designed in the same orientation within a ring section, or be configured very differently depending on the individual design of the pump hydraulics.
- the segments are designed as micro blades.
- the segments have a length of more than 5%, preferably more than 10%, in particular more than 15%, and/or a length of less than 50%, preferably less than 45%, in particular less than 35%, of the carrier unit radius. Due to the short design, the segments ideally achieve the shape of micro-blades.
- the carrier unit preferably has more than 10, preferably more than 15, in particular more than 20 segments.
- generatively produced segments are applied to a conventionally manufactured carrier unit of a blade arrangement.
- This can be an open impeller.
- a closed impeller according to the invention is also conceivable.
- the carrier unit with the segments arranged thereon has a cover plate.
- the blade arrangement with the segments can also be designed as a guide device, preferably as a guide wheel.
- the carrier unit is preferably formed in one piece with the segments and/or, in the case of a closed blade arrangement, with the cover disk.
- the carrier unit and/or the cover disc can be conventional, for example, as cast parts be made.
- the segments can be applied to the carrier unit by means of a generative process, as a result of which a one-piece component of a centrifugal pump is produced.
- the blade arrangement can also be produced completely as a cast part.
- the blade arrangement can be manufactured using an integrative manufacturing unit using an innovative method.
- the carrier unit and/or the cover disk is manufactured conventionally by a primary forming and/or machining process.
- the optimal design and arrangement of the blades in the form of small segments, especially micro-blades is determined with the aid of a computer-aided simulation.
- the result of the simulation is a 3D CAD data set of the blade arrangement, whereby the integrative manufacturing unit arranges the segments on the carrier unit precisely through generative training.
- the term generative training includes all manufacturing processes in which material is applied layer by layer and thus three-dimensional components are created.
- the layered structure is computer-controlled and consists of one or more liquid or solid materials according to specified dimensions and shapes. During construction, physical or chemical flattening or melting processes take place.
- Typical materials for 3D printing are plastics, synthetic resins, ceramics, metals, carbon and graphite materials.
- Additive manufacturing processes are processes in which material is applied layer by layer to create a three-dimensional component.
- the segments are generatively manufactured.
- selective laser melting and cladding also known as build-up welding, are used to form the segments.
- cold gas spraying and extrusion in combination with the application of meltable plastic can also be used.
- generatively generated segments are particularly filigree and thin-walled dig. Fine segments, flow-optimized using CFD, transmit the impulse to the fluid almost loss-free and particularly efficiently.
- the complex structure of the segments prevents the formation of vortices and flow separation and is characterized by a low component mass.
- the segments are produced using a process in which a layer of construction material is first applied to a substrate.
- the structural material for producing the segments is preferably metallic powder particles.
- iron-containing and/or cobalt-containing powder particles are used for this purpose. These can contain additives such as chromium, molybdenum or nickel.
- the metallic structural material is applied in powder form in a thin layer to a plate. Then the pulverulent material is continuously melted locally by means of radiation at the desired locations and a solid layer of material is formed after solidification. The base is then lowered by the amount of one layer thickness and powder is applied again. This cycle is repeated until all layers are melted and the finished segments are formed.
- blade contours are produced that are particularly filigree and flow-optimized.
- a laser beam for example, can be used as radiation, which generates the segments from the individual powder layers.
- the data for guiding the laser beam are generated on the basis of a 3D CAD body using software.
- an electron beam EBN can also be used.
- the segments are made using a process that coats a base structure by welding.
- Build-up welding uses a welding filler material in the form of a wire or powder to build up a volume that creates a particularly filigree and flow-optimized shape for the segments.
- the carrier and/or cover disk can be produced by means of archetypes, forming or a subtractive manufacturing process.
- Archetypes are a major group of manufacturing processes that produce a solid body with a geometrically defined shape from a shapeless material. Primitive Forming is used to create the initial form of a solid body and to create the cohesion of matter.
- the cover disk is preferably produced from a cast material.
- a segment is generated in a flow-optimized manner and multiplied according to the optimal pump hydraulics arranged on the carrier unit.
- the invention is not limited to single-stage centrifugal pumps, but also extends in particular to multi-stage centrifugal pumps.
- the impeller according to the invention or the guide device according to the invention is characterized as being particularly flexible, since segments arranged in an individually optimized manner for each pump stage can be formed on each conventionally manufactured carrier unit.
- FIG. 1 shows a sectional view of a centrifugal pump with a spherical housing
- Fig. 2 is a plan view of a blade arrangement with a support unit and segments
- Fig. 3 cuts a plan view of a blade arrangement with different Ringab and segments
- FIG. 4 shows a plan view of a blade arrangement with ring sections overlapping on ordered segments
- FIG. 5 shows a plan view of a blade arrangement with radially curved segments
- FIG. 6 shows a plan view of a blade arrangement with radially curved segments of different lengths
- FIG. 7 shows a plan view of an impeller and a guide device with segments.
- Fig. 1 shows an example of a sectional view through a centrifugal pump with ball housing 14.
- the medium flows into the centrifugal pump via the suction mouth 11, is subjected to movement energy by an impeller 15, which is non-rotatably connected to the shaft 12, and leaves the pump housing via the pressure port 13.
- the bearing bracket cover 10 closes the pump chamber in the direction of the drive.
- the impeller 15 has a support unit 1 which is fitted with blades.
- the carrier unit 1 is formed in one piece with the blades and the cover plate 17 and is designed as a closed impeller 15 .
- a guide device 18 is positioned around the impeller 15, which catches the discharge of the impeller 15 and converts the kinetic energy into pressure energy.
- Fig. 2 shows the carrier unit 1 of a blade arrangement in the form of an impeller for a centrifugal pump with the carrier unit radius 5.
- the carrier unit 1 is divided into three ring sections 2, each of which is directly adjacent to one another. All ring sections 2 have the same annulus width 4.
- straight line segments 3 are arranged, which are arranged offset from ring section to ring section 2 zuei nander.
- the contour of the segments 3 is adapted to the positioning on the ring sections 2 . So the segment 3 is cut on the innermost Ringab 2 as a suction edge segment 6, the segment 3 on the middle ring portion 2 as a middle edge segment 7 and the segment 3 on the outer ring portion 2 as a pressure edge segment 8 is formed.
- Fig. 3 shows a carrier unit 1 of a blade assembly in the form of an impeller for centrifugal pumps with ring sections 2, which have a different annular width 4 on.
- the segments 3 are arranged centrally within the ring sections 2 , the length of the segments 3 being adapted to the respective ring width 4 .
- the seg elements 3 are offset depending on their position on a ring section 2 zueinan arranged.
- FIG. 4 shows a carrier unit 1 with ring sections 2 of the same circular ring width 4.
- the segments 3 are arranged both within a ring section 2 and ring section overlapping.
- the segments 3 are positioned on the carrier unit 1 both offset to one another and in a line with interruptions.
- FIG. 5 shows a carrier unit 1 with radially curved segments 3.
- the segments 3 are arranged within a ring section 2, the distances to the circular rings of the ring section 2 being the same for all segments 3.
- the seg elements 3 are arranged on the carrier unit 1 in the meridian direction.
- FIG. 6 shows a carrier unit 1 with radially curved segments 3 which partially overlap the ring sections 2.
- FIG. The curvature of the segments 3 is individually adapted to the respective ring section 2 .
- Fig. 7 shows a plan view of an impeller 15 and a guide device 18. Both the impeller 15 and the guide device 18 have a carrier unit 1, which is divided into ring sections 2 and on the radially curved segments 3 are net angeord.
- the segments 3 are arranged within a ring section 2, wherein the distances to the circular ring ends of the ring section 2 are formed for all segments 3 from the same.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021118564.5A DE102021118564A1 (de) | 2021-07-19 | 2021-07-19 | Schaufelanordnung mit Mikroschaufeln |
| PCT/EP2022/069793 WO2023001699A1 (de) | 2021-07-19 | 2022-07-14 | Schaufelanordnung mit mikroschaufeln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4374080A1 true EP4374080A1 (de) | 2024-05-29 |
Family
ID=82611113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22744200.1A Pending EP4374080A1 (de) | 2021-07-19 | 2022-07-14 | Schaufelanordnung mit mikroschaufeln |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12359675B2 (de) |
| EP (1) | EP4374080A1 (de) |
| JP (1) | JP2024524746A (de) |
| CN (1) | CN117677774A (de) |
| DE (1) | DE102021118564A1 (de) |
| WO (1) | WO2023001699A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2753808A (en) * | 1950-02-15 | 1956-07-10 | Kluge Dorothea | Centrifugal impeller |
| US3221662A (en) | 1963-02-14 | 1965-12-07 | American Radiator & Standard | Method and apparatus for controlling flow in centrifugal machines |
| SU653428A1 (ru) | 1977-10-06 | 1979-03-25 | Сумский филиал Специального конструкторского бюро по созданию воздушных и газовых турбохолодильных машин | Многор дна лопаточна решетка центробежной турбомашины |
| JPS555458A (en) * | 1978-06-28 | 1980-01-16 | Hitachi Ltd | Tandem impeller |
| JPH08303389A (ja) * | 1995-05-09 | 1996-11-19 | Hitachi Ltd | 遠心羽根車及び該遠心羽根車の製造方法 |
| DE102006021925A1 (de) | 2006-05-11 | 2007-12-13 | Wilo Ag | Radialkreiselpumpe mit nach der Drehrichtung veränderlichen Schaufeln |
| JP2012072701A (ja) * | 2010-09-28 | 2012-04-12 | Honda Motor Co Ltd | 遠心ポンプ |
| DE102011007907B3 (de) | 2011-04-21 | 2012-06-21 | Ksb Aktiengesellschaft | Laufrad für Kreiselpumpen |
| US9777741B2 (en) | 2014-11-20 | 2017-10-03 | Baker Hughes Incorporated | Nozzle-shaped slots in impeller vanes |
| DE102015212203A1 (de) | 2015-06-30 | 2017-01-05 | Ksb Aktiengesellschaft | Freistrompumpe |
| DE102015213451B4 (de) | 2015-07-17 | 2024-02-29 | KSB SE & Co. KGaA | Kreiselpumpen-Schaufelprofil |
| DE202018005106U1 (de) | 2018-11-05 | 2019-04-17 | Sergius Schipelenko | Zweistufiges Kreisellaufrad für Kreiselpumpen |
| CN112360806A (zh) | 2020-11-27 | 2021-02-12 | 西华大学 | 圆盘泵叶轮和圆盘泵 |
-
2021
- 2021-07-19 DE DE102021118564.5A patent/DE102021118564A1/de active Pending
-
2022
- 2022-07-14 CN CN202280051403.1A patent/CN117677774A/zh active Pending
- 2022-07-14 EP EP22744200.1A patent/EP4374080A1/de active Pending
- 2022-07-14 JP JP2024503781A patent/JP2024524746A/ja active Pending
- 2022-07-14 US US18/580,238 patent/US12359675B2/en active Active
- 2022-07-14 WO PCT/EP2022/069793 patent/WO2023001699A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20240328428A1 (en) | 2024-10-03 |
| JP2024524746A (ja) | 2024-07-05 |
| CN117677774A (zh) | 2024-03-08 |
| WO2023001699A1 (de) | 2023-01-26 |
| DE102021118564A1 (de) | 2023-01-19 |
| US12359675B2 (en) | 2025-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3256738B1 (de) | Strömungsführendes bauteil | |
| DE102014012480B4 (de) | Herstellverfahren für eine Beschaufelung einer Strömungsmaschine, Beschaufelung einer Strömungsmaschine und Laufrad | |
| EP3251787B1 (de) | Verfahren zur herstellung eines bauteils einer rotationsmaschine sowie bauteil hergestellt nach einem solchen verfahren | |
| DE4319727C2 (de) | Verfahren zur Herstellung eines Schaufelringes für einen trommelartig aufgebauten Rotor, insbesondere Verdichterrotor einer Turbomaschine | |
| DE3520218C2 (de) | ||
| EP4055303B1 (de) | Stirnrad | |
| DE60012691T2 (de) | Diffusoreinheit | |
| DE102014200381A1 (de) | Verfahren für das generative Herstellen eines Turbinenrades mit einem Deckband | |
| DE102014009735A1 (de) | Schaufel und Laufrad einer Strömungsmaschine, sowie Herstellverfahren dafür | |
| EP4374080A1 (de) | Schaufelanordnung mit mikroschaufeln | |
| DE102007055614A1 (de) | Verdichterrad eines Radialverdichters und Verfahren zur Herstellung eines solchen Verdichterrades | |
| WO2022023266A1 (de) | Gehäuse für strömungsführende bauteile | |
| EP4305315B1 (de) | Herstellung eines laufrades in einem hybridverfahren | |
| DE102013010571A1 (de) | Bauteil zur Strömungsberuhigung und Verfahren zur Herstellung eines derartigen Bauteils | |
| EP4305310B1 (de) | Herstellung eines stufengehäuses in einem hybridverfahren | |
| EP3510289B1 (de) | Kreiselpumpe | |
| DE102011102251A1 (de) | Verfahren zur Herstellung einer integral beschaufelten Rotorscheibe, integral beschaufelte Rotorscheibe, Rotor und Strömungsmaschine | |
| DE102021105624A1 (de) | Herstellung eines Leitrades auf hybride Weise | |
| EP4370801A1 (de) | Leichtbau-hydraulikdesign für verbesserte 3d-druckbarkeit | |
| EP4264059A1 (de) | Herstellung eines diffusors als gruppe von kanälen | |
| HK40109538A (zh) | 具有微叶片的叶片装置 | |
| WO2023025551A1 (de) | Splashing ring | |
| DE202006020065U1 (de) | Laufrad für eine Wasserturbine | |
| DE102022213765A1 (de) | Strömungsmaschine und Verfahren zur Herstellung einer ein Strömungsmedium führenden Komponente einer Strömungsmaschine | |
| DE102010020574A1 (de) | Strömungsführende Einrichtung |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20240112 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20251216 |