EP3510289A1 - Kreiselpumpe - Google Patents
KreiselpumpeInfo
- Publication number
- EP3510289A1 EP3510289A1 EP17765122.1A EP17765122A EP3510289A1 EP 3510289 A1 EP3510289 A1 EP 3510289A1 EP 17765122 A EP17765122 A EP 17765122A EP 3510289 A1 EP3510289 A1 EP 3510289A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- impeller
- housing
- shaft
- radiation
- 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
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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- 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
-
- 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
- F04D29/2227—Construction and assembly for special materials
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
Definitions
- the invention relates to a centrifugal pump with an impeller rotatably connected to a shaft, wherein the impeller is at least partially surrounded by a housing.
- Centrifugal pumps are turbomachines in which centrifugal force is used to convey media. For this reason, they are also referred to as centrifugal pumps.
- the medium to be pumped enters the centrifugal pump via a housing part, the suction port.
- the medium is captured by the rotating impeller and carried to the outside. The thus impressed speed of the medium leads to a pressure increase within the centrifugal pump.
- a central component of a pump is the impeller, which transfers the mechanical energy as an impulse to the fluid.
- the impeller shape determines how the flow exits the pump.
- With regard to the design of the impeller a distinction is made between closed, semi-open and open molds or molds with and without a cover and support disk. With a closed impeller, the impeller blade is connected on both sides with a disc. Main features of the housing are the flow supply and discharge to the impeller. Flow channels serve to convert the kinetic energy induced in the flow by the impeller into a static pressure. The production of conventional centrifugal pumps is very time consuming. All components are manufactured individually from different materials.
- centrifugal pump must be assembled from the individual components.
- the impeller which consists for example of a cast material, must be connected to the shaft, which is made for example of a steel.
- conventional centrifugal pumps have a split housing that consists of several parts that need to be assembled together. Bearings and seals must be mounted between the moving components and the stationary parts of the centrifugal pump.
- the materials for the individual components of the centrifugal pump must be selected so that they fulfill their respective tasks. Components with the load-bearing properties must have high strength and low brittleness. Components that come into contact with the medium to be pumped should be made of a hard, wear-resistant material.
- EP 1 059 457 A2 discloses a centrifugal pump with an impeller arranged in a housing, which is driven via a shaft.
- the shaft is rotatably mounted in the pump housing, wherein the bearing comprises a bearing holder in addition to a rolling bearing.
- the bearing holder is detachably connected to the housing.
- the bearing holder has on the impeller end facing a preferably integrally formed with a pipe part mounting part.
- EP 1 533 528 A2 describes a method for producing an impeller for a centrifugal pump, in which a first part, which comprises a rear cover disk, is produced in a spraying or casting process and then a second part, which includes the front cover plate, is pushed onto the first part.
- a centrifugal pump impeller which is composed of a plurality of sheet metal parts.
- the energy-transferring blades are attached only to the force-transmitting cover plate.
- the inlet region of the impeller forms a suction mouth, which is designed as a single part.
- the suction mouth covers the blade beginnings.
- a shovel-free cover disc covering the blade channels is secured to the blades between the impeller outlet and the maximum diameter of the suction mouth.
- the object of the invention is to provide a centrifugal pump, in which the assembly effort is minimized.
- the centrifugal pump should be as inexpensive to manufacture and be characterized by a long life, as well as a reliable operation.
- the specifications of the centrifugal pump should be customizable with the least possible effort.
- the centrifugal pump should be characterized by a good recyclability in terms of sustainable development.
- the impeller is formed with the shaft as a one-piece component.
- the unitary member is made of a building material by successively melting and solidifying layers by means of radiation.
- the building material is metallic powder and / or granules particles.
- ferrous and / or cobalt-containing particles used. These may contain additives such as chromium, molybdenum or nickel.
- the metallic building material is applied in powder or granular form in a thin layer on a substrate.
- the powdery material is locally completely remelted by means of radiation at the respective desired locations and forms a solid material layer after solidification.
- the pad is lowered by the amount of a layer thickness and powder is applied again. This cycle is repeated until all layers have been remelted.
- the finished component is cleaned of the excess powder.
- a laser beam can be used, which generates the flow-guiding component from the individual powder layers.
- the data for guiding the laser beam are generated on the basis of a 3D CAD body by means of software.
- an electron beam EBM can also be used.
- the centrifugal pump according to the invention preferably comprises a housing, which is likewise produced from the structural material by successive solidification of layers by means of radiation. It proves to be advantageous if the housing is formed in one piece and is formed around the one-piece component of impeller and shaft.
- At least one bearing is arranged as a further component between the shaft and the housing, which is likewise produced by successive solidification of layers by means of radiation.
- To generate the storage can be prepared for example by successive melting and solidification of layers by means of radiation from the building material with rotating body, which are arranged between the stationary housing parts and the rotating components of the centrifugal pump, such as the shaft.
- the bodies may be spheres or cylinders.
- these bodies are arranged in the bearings between an inner ring and / or an outer ring, which are also generatively formed from the building material and together with the bodies form the respective storage.
- the building material may be formed as granules or powder.
- spherical biologymaterial is used.
- the impeller and the housing and / or between the shaft and the housing and seals are arranged as further components, which are produced by successive solidification of layers by means of radiation from the building material.
- labyrinth seals can be formed in the generative structure of the centrifugal pump from the building material.
- the sealing effect is based on the lengthening of the flow path through the gap to be sealed, which substantially increases the flow resistance.
- the path extension is produced by an intermeshing ("meshing") of formations on rotating components and formations on stationary components, and these formations on the respective components are produced in the generative structure.
- components which slide on one another and which have an annular configuration may be formed as seals, wherein preferably two rings correspond to one another.
- One of the two rings is formed integrally from the housing.
- the other ring is formed integrally with a rotating component, for example the shaft.
- the centrifugal pump generated in this way has according to the invention components with different mechanical properties.
- the building material for generating the entire centrifugal pump is chemically identical, according to the invention different metallic structures are produced by a variation of the radiation. This results in components with different metallic structures and thus different properties.
- the entire centrifugal pump is manufactured from the same building material, preferably in a single continuous production process.
- the invention enables, for example, the generative generation of low-cost or disposable products.
- the generation of the centrifugal pump is a targeted control of the energy input in the construction of the component to change the mechanical properties in the micro volume of the material.
- Subsequent heat treatment is dispensed with so that the locally occurring different material states are preserved. Elaborate coatings are also no longer required.
- the energy input introduced by the radiation differs in the components which come into contact with the medium from the components which have predominantly supporting properties. This can be achieved, for example, by varying the intensity of the radiation.
- the scanning speed with which the laser beam travels over the individual powder layers also influences the energy input and thus the resulting microstructure. Components which have load-bearing properties preferably have greater strength.
- the single figure shows a sectional view of a centrifugal pump.
- the figure shows a sectional view through a centrifugal pump assembly with an impeller 1, a housing 2 is generatively formed around the impeller 1.
- the housing 2 is formed in one piece and has a suction nozzle 3 and a discharge nozzle 4.
- the housing 2 in the exemplary embodiment is a spiral housing.
- the impeller 1 is designed as a radial impeller and is driven by a shaft 5.
- the shaft 5 is set in rotation by a motor, not shown in this illustration. Impeller 1 and shaft 5 form a one-piece component.
- the shaft 5 is supported by bearings 6. Between the impeller 1 and the housing 2 seals 7 are arranged.
- a metal powder of a ferrous material is applied in a thin layer on a plate.
- the powder is a powder of a chromium molybdenum steel.
- a laser beam acts and fuses the powdery particles together.
- the base plate is lowered by the amount of layer thickness and powder is applied again. This cycle is repeated until all layers have been remelted.
- the finished component is cleaned of the excess powder.
- the 3D-form of the centrifugal pump is stored in a software as a data record.
- the laser beam is moved by a control device in such a way that it melts the shape of the centrifugal pump by corresponding selective melting of the respective regions on the powder-coated plate and then solidifies these regions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016217110.0A DE102016217110A1 (de) | 2016-09-08 | 2016-09-08 | Kreiselpumpe |
| PCT/EP2017/071990 WO2018046405A1 (de) | 2016-09-08 | 2017-09-01 | Kreiselpumpe |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3510289A1 true EP3510289A1 (de) | 2019-07-17 |
| EP3510289B1 EP3510289B1 (de) | 2024-03-20 |
| EP3510289C0 EP3510289C0 (de) | 2024-03-20 |
Family
ID=59856499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17765122.1A Active EP3510289B1 (de) | 2016-09-08 | 2017-09-01 | Kreiselpumpe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3510289B1 (de) |
| DE (1) | DE102016217110A1 (de) |
| WO (1) | WO2018046405A1 (de) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3731161C2 (de) | 1987-09-17 | 1996-12-12 | Klein Schanzlin & Becker Ag | Kreiselpumpenlaufrad |
| AT413580B (de) | 1999-06-10 | 2006-04-15 | Tcg Unitech Ag | Kreiselpumpe |
| DE10354750A1 (de) | 2003-11-21 | 2005-06-23 | Siemens Ag | Verfahren zur Herstellung eines Laufrades für eine Kreiselpumpe |
| ITFI20120035A1 (it) * | 2012-02-23 | 2013-08-24 | Nuovo Pignone Srl | "produzione di giranti per turbo-macchine" |
| US20140169971A1 (en) * | 2012-12-18 | 2014-06-19 | Hamilton Sundstrand Corporation | Additively manufactured impeller |
| DE102015202417A1 (de) * | 2015-02-11 | 2016-08-11 | Ksb Aktiengesellschaft | Stömungsführendes Bauteil |
| EP3405680B1 (de) * | 2016-01-22 | 2020-05-20 | Florida Turbine Technologies, Inc. | Turbopumpe mit einstuckigem gehäuse und einstuckigem laufrad |
-
2016
- 2016-09-08 DE DE102016217110.0A patent/DE102016217110A1/de not_active Withdrawn
-
2017
- 2017-09-01 WO PCT/EP2017/071990 patent/WO2018046405A1/de not_active Ceased
- 2017-09-01 EP EP17765122.1A patent/EP3510289B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3510289B1 (de) | 2024-03-20 |
| BR112019004506A2 (pt) | 2019-05-28 |
| DE102016217110A1 (de) | 2018-03-08 |
| EP3510289C0 (de) | 2024-03-20 |
| WO2018046405A1 (de) | 2018-03-15 |
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