WO2022128262A1 - Herstellung eines diffusors als gruppe von kanälen - Google Patents
Herstellung eines diffusors als gruppe von kanälen Download PDFInfo
- Publication number
- WO2022128262A1 WO2022128262A1 PCT/EP2021/081200 EP2021081200W WO2022128262A1 WO 2022128262 A1 WO2022128262 A1 WO 2022128262A1 EP 2021081200 W EP2021081200 W EP 2021081200W WO 2022128262 A1 WO2022128262 A1 WO 2022128262A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- centrifugal pump
- segments
- guide device
- impeller
- flow
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 238000005304 joining Methods 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 6
- 238000005755 formation reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000264877 Hippospongia communis Species 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/30—Manufacture with deposition of material
- F05D2230/31—Layer deposition
Definitions
- the invention relates to a centrifugal pump with at least one impeller, which is followed by a guide device.
- Such guide devices usually have guide vanes. Channels for the pumped medium are formed between the vanes. Such guide devices can be designed as guide wheels. Pumped medium escaping from the impeller enters the guide device. Kinetic energy is converted into pressure energy in the guide device. Furthermore, a deflection of the medium takes place. If necessary, the swirl is reduced for an inflow into a further stage.
- DE 39 12 279 C2 describes a centrifugal pump of single-stage or multi-stage design with at least one impeller.
- a guide wheel is arranged downstream of the impeller in the direction of flow.
- the guide wheel has several guide vanes.
- DE 10 2014 223 942 A1 describes a single-stage or multi-stage centrifugal pump with a guide device.
- the pumped medium flows to a first impeller and experiences an increase in pressure as a result.
- Downstream of the impeller is a guide device, on the guide channels of which guide elements are arranged.
- the guiding device can be designed as a diffuser.
- a diffuser is a component that converts a flow with a certain initial value of flow velocity and static pressure into a flow with a lower velocity and higher static pressure with as little loss as possible.
- a characteristic feature of a diffuser is the flow guidance in a closed channel with cross sections that increase in flow direction.
- the diffuser is very often used as a pressure-side housing part in annular and volute casing pumps, multi-stage centrifugal pumps and as a component in pipelines.
- the object of the invention is to specify a centrifugal pump with a guide wheel and the smallest possible radial installation space.
- the centrifugal pump should have the highest possible efficiency. A flow separation should be largely prevented. Furthermore, a delay with as little loss as possible should be ensured.
- the centrifugal pump should be characterized by a construction that is as cost-effective as possible and reliable operation. Furthermore, the longest possible service life should be achieved.
- a centrifugal pump has at least one impeller, which is followed by a guide device.
- This guide device is formed from at least two additively manufactured segments.
- Generative or additive manufacturing processes are processes in which material is applied layer by layer and three-dimensional components are thus produced.
- selective laser melting, cold gas spraying and extrusion in combination with the application of meltable plastic are used to form the segments.
- a segment is a part of a whole and thus the assembly, in particular the joining together, of segments results in a whole component.
- the segmented design and the joining of the generatively manufactured segments allows guide devices, in particular diffusers as a group of channels, which can have dimensions that previously could not be achieved in an unsegmented design.
- Additively manufactured control systems are characterized by hydraulically optimized geometries that cannot be achieved with machining or casting manufacturing processes.
- the design of a complex control device in segments enables a hydraulically optimized geometry on the one hand and component sizes that exceed the known production dimensions on the other.
- a segment is designed as a channel.
- a channel can be formed by means of generative manufacturing, which was previously determined in an optimized manner using a computer-aided simulation.
- Such a duct exhibits improved hydraulic properties over vanes attached to the pump housing and realizes improved overall pump efficiency.
- the cross section of a channel preferably increases in the direction of flow.
- the flow rate of a pumped fluid is reduced particularly efficiently and at the same time a higher static pressure is achieved.
- the channel has a bend to redirect the flow.
- the fluid to be conveyed is thus completely taken up by the guide device from the impeller discharge and can thus be optimally supplied to a downstream pump impeller.
- the curvature deflects the flow of the fluid in a particularly advantageous manner, so that there is no flow separation at the outlet of the curvature and reinforcement of the guiding device can be dispensed with.
- a channel of a segment has formations. Due to the shaping, roundings are formed in the channel, which reduce the formation of eddies and thereby increase the efficiency of the centrifugal pump.
- a segment advantageously has at least one bore for forming an axial diffusion flow.
- the arrangement of the bore can be optimized and the formation of the diffusion flow to reduce the diameter of the guide device can be achieved.
- the guiding device comprises more than 5, preferably more than 7 segments, in particular more than 9 segments. With a large number of segments and thus also of channels, the diffuser effect can be optimally implemented.
- the segments are connected to form a guiding device with a non-detachable connection, preferably a welded connection.
- a non-detachable connection preferably a welded connection.
- the walls of the segments are very thin and the segments have an internal lattice structure to increase their strength.
- Guide devices with a particularly excellent ratio of mass to component volume can be achieved in this advantageous manner.
- the guide devices produced from generatively manufactured segments have an extremely low mass.
- a guide device composed of generatively manufactured segments is used as a diffuser for a centrifugal pump.
- the guide device according to the invention has a particularly round and curved shape of the channels.
- the flow guidance of the fluid within the guide device is characterized in that it can be designed to be particularly turbulence-free and thus a high degree of efficiency of the centrifugal pump can be achieved.
- the channel segments can be produced with the tool of selective laser melting, the positioning of the segments can be carried out with a fixing tool and the connecting joints can be formed with a welding tool.
- welding creates an inseparable connection between segments using heat and/or pressure, with or without welding filler materials.
- the additional materials are usually supplied in the form of rods or wires, melted and solidified in the joint between the joining partners in order to create the connection.
- Welding is one of the material-to-material connection methods, whereby high-strength connections are created.
- the guide device can be formed from different structural materials.
- the structural material preferably comprises metallic powder particles, in particular low-alloy and/or high-alloy steel powder particles, and/or meltable plastic and/or a metal-polymer hybrid material.
- the structural material for producing the contact surface with the flowing fluid 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 segments of the guide device are formed in an additive manufacturing process.
- the 3D shape of a segment which is designed as a channel, is stored in software as a data record.
- a robot arm which has tools from different additive processes, acts and forms the contact surface to the flowing medium and the supporting lattice structure of the contact surfaces layer by layer.
- the appropriate build-up process for each build-up material can be carried out for each layer one after the other or simultaneously, so that a complex segment made of different materials is created, the areas of which are optimally adapted to the requirements of later use.
- the lattice structure is produced with the fused layer tool of the additive manufacturing process, in which a grid of points is applied to a surface from meltable plastic.
- a stable structure in particular in the form of a lattice and/or in the form of honeycombs, is produced by extrusion using a nozzle and subsequent hardening by cooling at the desired position. Because the supporting area of a segment is created in a cavity-forming manner with a particularly load-bearing structure, a segment has enormous strength while at the same time having a very low mass.
- a segment is usually built up by repeatedly traversing a working plane line by line and then stacking the working plane upwards so that the supporting area of a segment is created.
- the contact surface for the flowing fluid is produced from a structural material by means of successive melting and solidification of layers by means of radiation.
- the different properties of the areas of a segment are generated by variations in the radiation.
- the material properties are modified during the construction of the segment. This makes it possible to create zones and structures of different material states of a chemically homogeneous material and thus different properties in one area of the segment.
- the metallic structure material is applied in powder form in a thin layer to a plate.
- the powdered material is completely remelted locally at the desired points by means of radiation and forms a solid layer of material after solidification.
- This base plate is then lowered by the amount of one layer thickness and powder is applied again. This cycle is repeated until all layers have been remelted.
- the finished segment is cleaned of excess powder.
- a laser beam for example, can be used as radiation, which generates the segment from the individual powder layers.
- the data for guiding the laser beam are generated using software on the basis of a 3D CAD body.
- an electron beam EBM
- EBM electron beam
- 1 shows a multi-stage centrifugal pump according to the prior art
- 2 shows an improved version of a guide device
- FIG 3 shows a schematic representation of a segment of the guide device.
- a pumped liquid for example an easily degassing or flammable fluid with a low boiling point, flows in the direction of the drawn flow arrows to a first pump stage 4 with a first impeller of radial design.
- This first impeller acting as a suction impeller 5, feeds into a guide device 6, in which the kinetic energy of the fluid generated by the suction impeller 5 is converted into pressure energy.
- the guide device 6 is followed by return blading 7 , with which the fluid is fed to a second pump stage 8 with a second impeller 9 .
- the impeller 5 and the second impeller 9 are provided with gap seals 10, 11 on the suction and pressure sides. These reduce a backflow of pumped fluid and limit impeller side spaces 12, 13 on the suction and pressure side.
- the two impeller side spaces 13 on the pressure side here enclose pressure-side relief spaces 14, from which a relief flow of a pumped fluid flows back through the relief openings 15 into the inlet area 16 of the impellers for the purpose of axial thrust relief 5, 9 flows.
- the guide device 6 shows a perspective view of an improved embodiment of the guide device 6.
- the guide device 6 consists of twelve additively manufactured segments 17, which have been connected by a joining method.
- Each segment 17 is in the form of a channel 18, the cross-section of which increases in the direction of flow.
- the guiding device 6 can take up the discharge of the impeller 5, deflect the flow and, by means of the channels 18 provided with formations, avoid the formation of turbulence and feed it to the following impeller 9.
- the guiding device 6 is distinguished by particularly round and curved shapes within the channel 18 .
- the guide device 6 shown here is characterized by a flow guide that can achieve a particularly high efficiency of the centrifugal pump.
- Fig. 3 shows a schematic representation of a segment 17 of the guide device 6.
- the segment 17 is in the form of a channel, the cross section of which increases in the direction of the flow of the fluid.
- the channel 18 has a bend 19 for deflecting the fluid flow which is supplied to the impeller 9 by the impeller discharge of the impeller 5 .
- the segment 17 has at least one bore 20 for forming a diffusion flow.
- the arrangement of the hole or holes 20 is previously determined by CFD simulation. The axial and radial flow of the fluid is optimized in such a way that a minimum diameter of the guide device 6 can be achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180084418.3A CN116745531A (zh) | 2020-12-15 | 2021-11-10 | 作为通道组的扩散器的制造 |
US18/267,155 US20240093698A1 (en) | 2020-12-15 | 2021-11-10 | Production of a Diffusor as a Group of Channels |
EP21811271.2A EP4264059A1 (de) | 2020-12-15 | 2021-11-10 | Herstellung eines diffusors als gruppe von kanälen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020133459.1 | 2020-12-15 | ||
DE102020133459.1A DE102020133459A1 (de) | 2020-12-15 | 2020-12-15 | Herstellung eines Diffusors als Gruppe von Kanälen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022128262A1 true WO2022128262A1 (de) | 2022-06-23 |
Family
ID=78725453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/081200 WO2022128262A1 (de) | 2020-12-15 | 2021-11-10 | Herstellung eines diffusors als gruppe von kanälen |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240093698A1 (de) |
EP (1) | EP4264059A1 (de) |
CN (1) | CN116745531A (de) |
DE (1) | DE102020133459A1 (de) |
WO (1) | WO2022128262A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE450681C (de) * | 1922-10-20 | 1927-10-13 | Emilio Vianello | Einrichtung an den Raedern von mehrstufigen Kreiselverdichtern zur Verdichtung von Sattdampf bis zur Verfluessigung |
DE3912279C2 (de) | 1989-04-14 | 1991-01-31 | Ksb Aktiengesellschaft, 6710 Frankenthal, De | |
US20130011269A1 (en) * | 2009-11-23 | 2013-01-10 | Nuovo Pignone S.P.A. | Mold for a centrifugal impeller, mold inserts and method for building a centrifugal impeller |
DE102014223942A1 (de) | 2014-11-25 | 2016-06-30 | Ksb Aktiengesellschaft | Kreiselpumpe mit einer Leiteinrichtung |
US20190249560A1 (en) * | 2018-02-13 | 2019-08-15 | Corey B. Kuhns | Angular Velocity Stepping and Methods of Use in Turbomachinery |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2772843B1 (fr) * | 1997-12-19 | 2000-03-17 | Snecma | Dispositif de transfert de fluide entre deux etages successifs d'une turbomachine centrifuge multietages |
US11448230B2 (en) * | 2014-05-26 | 2022-09-20 | Nuovo Pignone Tecnologie S.r.l. | Method for manufacturing a turbomachine component |
EP3251787A1 (de) | 2016-05-31 | 2017-12-06 | Sulzer Management AG | Verfahren zur herstellung eines bauteils einer rotationsmaschine sowie bauteil hergestellt nach einem solchen verfahren |
US20180104912A1 (en) * | 2016-10-18 | 2018-04-19 | Autodesk, Inc. | Systems and methods of cellular-hull infill structure generation for additive manufacturing |
DE102018112562A1 (de) | 2018-05-25 | 2019-11-28 | Man Energy Solutions Se | Leitgitter einer Strömungsmaschine und Verfahren zum Herstellen desselben |
US11220922B1 (en) * | 2020-06-17 | 2022-01-11 | Honeywell International Inc. | Monolithic diffuser and deswirl flow structure for gas turbine engine |
US11391296B1 (en) * | 2021-07-07 | 2022-07-19 | Pratt & Whitney Canada Corp. | Diffuser pipe with curved cross-sectional shapes |
-
2020
- 2020-12-15 DE DE102020133459.1A patent/DE102020133459A1/de active Pending
-
2021
- 2021-11-10 CN CN202180084418.3A patent/CN116745531A/zh active Pending
- 2021-11-10 EP EP21811271.2A patent/EP4264059A1/de active Pending
- 2021-11-10 US US18/267,155 patent/US20240093698A1/en active Pending
- 2021-11-10 WO PCT/EP2021/081200 patent/WO2022128262A1/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE450681C (de) * | 1922-10-20 | 1927-10-13 | Emilio Vianello | Einrichtung an den Raedern von mehrstufigen Kreiselverdichtern zur Verdichtung von Sattdampf bis zur Verfluessigung |
DE3912279C2 (de) | 1989-04-14 | 1991-01-31 | Ksb Aktiengesellschaft, 6710 Frankenthal, De | |
US20130011269A1 (en) * | 2009-11-23 | 2013-01-10 | Nuovo Pignone S.P.A. | Mold for a centrifugal impeller, mold inserts and method for building a centrifugal impeller |
DE102014223942A1 (de) | 2014-11-25 | 2016-06-30 | Ksb Aktiengesellschaft | Kreiselpumpe mit einer Leiteinrichtung |
US20190249560A1 (en) * | 2018-02-13 | 2019-08-15 | Corey B. Kuhns | Angular Velocity Stepping and Methods of Use in Turbomachinery |
Also Published As
Publication number | Publication date |
---|---|
US20240093698A1 (en) | 2024-03-21 |
EP4264059A1 (de) | 2023-10-25 |
DE102020133459A1 (de) | 2022-06-15 |
CN116745531A (zh) | 2023-09-12 |
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