EP4259938A1 - Pumpenanordnung - Google Patents
PumpenanordnungInfo
- Publication number
- EP4259938A1 EP4259938A1 EP21815933.3A EP21815933A EP4259938A1 EP 4259938 A1 EP4259938 A1 EP 4259938A1 EP 21815933 A EP21815933 A EP 21815933A EP 4259938 A1 EP4259938 A1 EP 4259938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- pressure
- housing
- pressure chamber
- arrangement 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.)
- 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
- F04D29/40—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
-
- 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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D1/063—Multi-stage pumps of the vertically split casing type
-
- 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
- F04D1/063—Multi-stage pumps of the vertically split casing type
- F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
-
- 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
- F04D29/086—Sealings especially adapted for liquid 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/14—Casings or housings protecting or supporting assemblies within
-
- 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
- F05D2250/00—Geometry
- F05D2250/20—Three-dimensional
- F05D2250/29—Three-dimensional machined; miscellaneous
- F05D2250/294—Three-dimensional machined; miscellaneous grooved
Definitions
- the invention relates to a pump arrangement surrounded impeller arranged on the shaft and a seal separating a first pressure chamber from a second pressure chamber.
- centrifugal pump arrangement of this type also known as a double-casing pump or casing-casing pump, is shown, for example, in DE 199 27 135 A1.
- the centrifugal pump is surrounded by a jacket-like housing.
- the shell housing which is provided with suction and pressure connections and optionally with intermediate tapping points, is closed with a cover in a plane perpendicular to the shaft.
- These are usually multi-stage pumps for use as high- and ultra-high-pressure pumps, in particular also as boiler feed pumps.
- a plurality of compression stage housings are arranged in series in the axial direction one behind the other within the jacket housing.
- Each pressure stage includes a pump impeller and, optionally, a stationary diffuser.
- the individual pressure stage housings of each pressure stage are usually designed together with the pump shaft as a connected pump unit.
- the flow transition from the last diffuser or the last pressure stage casing into the pressure nozzle usually takes place via a flow chamber formed in the jacket casing or via a separate insert for an end spiral in the transition area.
- Feed pumps often have several pressure ranges within the casing, which can be seen from the outside and which represents the pressure shell. If the pressure areas are adjacent to each other, they must be sealed against each other in all possible modes of operation, i.e. under all occurring loads. This is usually done with the help of special static seals. However, during operation, i.e. under load, the installation space provided for these seals is subject to deformations or displacements compared to the load-free state, which leads to heavy loading of the seal and can thereby reduce the reliability of its sealing function.
- the object of the invention is therefore to provide a generic pump arrangement which eliminates the cause of this sealing problem, namely the excessive differential deformation of the components surrounding the seal.
- the compression housing comprises a first part and a second part, the first part having a first area with an enlarged inner diameter and a second area with a reduced inner diameter, the second part having at least a first section with a reduced outer diameter and a second section with an enlarged Having outer diameter and the first region of the first part surrounding the first portion and at least partially the second portion of the second part, such that an annular space is formed between the first part and the second part.
- the outer diameter of the second section of the annular disk-like part and the inner diameter of the first area of the sleeve-like part are formed at their overlapping areas in such a way that the first area is spaced apart from the second section with very little play or comes into contact with it or limits an inward deformation of the first region of the sleeve-like part or in the direction of the axis of rotation.
- the second section of the annular disk-like part expediently has means for connecting the annular space to the second pressure space.
- the second section of the second part has a lateral surface in which at least one groove is provided, which is connected to the annular space or is connected directly to the annular space.
- the annular disc-like part has a third section adjoining the second section of the second part, with at least one axial groove extending parallel to the axis of rotation in the outer jacket surface of the third section, which forms a channel with the jacket housing, or at least one extending parallel to the axis of rotation axial bore is formed near the outer surface area, wherein the axial groove or the axial bore opens into the second pressure chamber.
- a radially circumferential gap is expediently provided at the transition from the second section to the third section, which is connected on the one hand to the at least one groove and on the other hand to the at least one axial groove or the at least one axial bore extending in the outer lateral surface of the third section.
- the second part has at least one axial bore, which extends essentially parallel to the axis of rotation and connects the annular space directly to the second pressure space. Exemplary embodiments of the invention are shown in the drawing and are described in more detail below. It shows the
- FIG. 1 shows a partial sectional view of a pump arrangement with a first embodiment of the pressure stage housing according to the invention
- Fig. 2 shows an enlarged excerpt from Fig. 1 and
- FIG. 3 shows a partial sectional view of a stage housing according to the invention in the embodiment according to FIGS. 1 and 2.
- FIG. 4 shows a partial sectional view of a second embodiment of the stage casing according to the invention in the installed state
- FIG. 5 shows the partial view of the stage housing according to FIG. 4 in section
- FIG. 6 shows a partial sectional view of a third embodiment of the stage casing according to the invention in the installed state
- FIG. 1 shows a pump arrangement designed as a centrifugal pump with a jacket housing 1 .
- a slot 2 is arranged at least partially in the casing 1 .
- the slide-in unit 2 comprises a shaft 3 arranged to be rotatable about an axis of rotation A by a drive (not shown), e.g. an electric motor.
- the running wheels 4 are radial wheels in the exemplary embodiment.
- the slide-in unit 2 also includes a number of so-called compression housings 5, the compression housing according to the invention being identified by 5'.
- Each impeller 4 is surrounded by a compression housing 5 or 5'. Neighboring compression housings 5, 5' adjoin one another.
- the parting line between the pressure stage housings 5, 5' is metallically sealed in the exemplary embodiment.
- each pressure stage housing 5, 5' there is a guide wheel 6 arranged behind the respective impeller 4 in the direction of flow of the medium to be conveyed.
- the idler wheel 6 is connected to the compression stage housing 5, 5' in a torque-proof manner by means of a press fit or other suitable means.
- a suction connection 7 is formed on the shell housing 1, through which the operating medium enters the centrifugal pump. About a pressure nozzle 8, the operating medium leaves the pump assembly.
- the jacket housing 1 has an intermediate extraction point 9 .
- a certain proportion of the medium being pumped can be pumped into a first pressure chamber 11, which is arranged between the pressure stage housings 5, 5' and the jacket housing 1, and can be discharged via the intermediate extraction 9 .
- the pressure chamber 11 is separated by a seal 12 from a second pressure chamber 13 close to the pressure connection 8 , in particular below in an inflow area to the pressure connection 8 , or inside the pressure connection 8 .
- the pressure in the second pressure chamber 13 is at least the pressure of one stage higher than the pressure present in the pressure chamber 11 up to n-1 times the stage pressure, where n stands for the number of stages.
- 1 shows a multi-stage pump arrangement with six pressure stages and five pressure stage housings 5, 5'. It goes without saying that the number of pressure stages must be at least two, otherwise it can vary as desired. Furthermore, it is conceivable that all pressure stages can be formed by means of pressure stage housings 5' according to the invention.
- FIG. 2 which shows an enlarged detail from FIG communicates with the second pressure chamber 13 in the area of the pressure port 8 . 2 also shows how the seal 12 interacts with the casing 1 and the compression stage housing 5' according to the invention, as well as the arrangement of the guide wheel 6 and the arrangement of the impeller 4 placed on the shaft 3 rotating about the axis of rotation A within the compression stage housing 5'. .
- Fig. 3 separately shows the cup-shaped or pot-shaped compression stage housing 5 'according to Fig. 2.
- the compression stage housing 5' comprises a sleeve-like first part 16 and a ring-like second part 17.
- the sleeve-like first part 16 has a first area 18 with an enlarged Inner diameter and a second region 19 with a reduced inner diameter.
- the sleeve-like part 16 is connected to the annular disk-like second part 17 .
- Both parts 16 and 17 can be fused together or produced in one piece, for example by means of 3D printing.
- the parts 16 and 17 can be fused together or produced in one piece, for example by means of 3D printing.
- the parts 16 and 17 can be fused together or produced in one piece, for example by means of 3D printing.
- the parts 16 and 17 can be fused together or produced in one piece, for example by means of 3D printing.
- the parts 16 and 17 can be fused together or produced in one piece, for example by means of 3
- the annular disk-like part 17 has a first section 20 and a second section 21 with an outer surface 22 .
- the lateral surface 22 is essentially cylindrical, but also has a conical section.
- At least one groove 23 is provided in the lateral surface 22 , as a result of which the section 21 has indentations and elevations 24 with the lateral surface 22 .
- the at least one groove 23 runs essentially parallel to the axis of rotation A.
- the first area 18 of the sleeve-like part 16 surrounds both the first section 20 and partly also the second section 21 of the annular disk-like second part 17 .
- the outer diameter of the second section 21 of the annular disk-like part 17 and the inner diameter of the first area 18 of the sleeve-like part 16 are formed at their overlapping areas in such a way that the first area 18 is spaced from the second section 21 with very little play or at this comes to the plant.
- annular space 25 is connected to the at least one groove 23 or is connected directly to the groove 23 in terms of fluid technology. Due to the annular space 25, the first region 18 of the sleeve-like part 16 is elastic within certain limits.
- the lateral surface 22 of the elevations 24 prevents or limits an inward deformation of the elastic region 18 of the sleeve-like part 16 or in the direction of the axis of rotation A.
- the part 17 also has a third section 26 adjoining the second section 21 on the side facing away from the annular space 25 .
- the outer diameter of the second section 21 is smaller than the outer diameter of the third section 26.
- the third section 26 has a step that can be provided for fastening the compression housing 5' to the jacket housing, if necessary.
- the channel 15 shown in Fig. 2 is formed by at least one axial groove (not shown) in the outer jacket surface 27 of the third section 26, which extends in the axial direction and interacts with the jacket housing 1, with a radial connecting groove (not shown) in the area of the step is provided, which connects the two axial groove sections in the outer jacket surface 27 to one another.
- the axial grooves and the connecting groove can also be formed in the casing 1 .
- a radially circumferential gap 28 is formed at the transition from the second section 21 to the third section 26, which gap is connected to the at least one groove 23.
- the gap 28 also communicates with the axial groove extending in the axial direction in the outer lateral surface 27 of the third section 26 and thus with the channel 15 shown in FIG. 2 and the pressure chamber 13.
- a chamfer is provided at the transition from the first area 18 to the second area 19 of the sleeve-like first part 16, ie the outer diameter of the sleeve-like part 18 is larger than the outer diameter of the area 19 so that the seal 12 can be fitted without problems.
- 4 shows a further embodiment of the pressure stage housing 5' according to the invention in the installed state.
- FIG. 5 shows the compression housing 5' shown in FIG. 4 in detail.
- the first sleeve-like part 16 essentially corresponds to the embodiment of the compression stage housing 5' shown in FIGS. 1 to 3 and requires no further explanation.
- the second section 21 of the second part 17 with the at least one groove 23 and the at least one elevation 24 and the lateral surface 22 and the annular space 25 essentially correspond to the embodiments described for FIGS.
- the at least one axial bore 29 can be connected to the annular space 25 or connected directly to it and can extend through the second section 21 and the third section 26 and in the second pressure chamber 13 open.
- the axial bore 29 thus connects the annular space 25 directly to the second pressure space 13 in the area of the pressure connector 8. Grooves in the lateral surface 22 can be dispensed with.
- the third section 26 has a step, but this is not required for a type of fastening of the compression stage housing 5', as is shown in FIGS. 4 and 5.
- medium is sucked into the pump via the suction nozzle 7 and flows to the pressure stage housing 5, which is the first downstream of the suction nozzle in terms of flow.
- the medium is guided to the next pressure stage housing 5 by means of the impeller 4 via the guide wheel 6 which is arranged downstream or downstream in terms of flow.
- Part of the medium is conveyed into the pressure chamber 11 via the at least one opening 10 in the stage housing 5, which is closest to the intermediate extraction point 9, from where it can be conveyed out of the pump via the intermediate extraction point 9.
- the majority of the medium is fed to the next pressure stage housings 5 in a corresponding manner.
- the last guide wheel 6 conveys the medium into the pressure chamber 13. From there, according to FIGS. 1 to 3, part of the medium flows via the at least one channel 15 and the radially circumferential gap 28 into the at least one groove 23 in the second section 21 and then into the annular space 25 or according to FIGS. 4 and 5 via the at least one axial bore 29 and the radially circumferential gap 28 into the at least one groove 23 and then into the annular space 25 or according to FIG. 6 directly via the at least one axial bore 29 from the pressure chamber 13 into the annular chamber 25.
- the pressure chamber 13 forms a medium-filled system of communicating spaces with the at least one channel 15 or the at least one axial bore 29, the radially circumferential gap 28, the at least one groove 26 and the adjoining annular chamber 25.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020133327.7A DE102020133327B4 (de) | 2020-12-14 | 2020-12-14 | Pumpenanordnung |
| PCT/EP2021/081670 WO2022128282A1 (de) | 2020-12-14 | 2021-11-15 | Pumpenanordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4259938A1 true EP4259938A1 (de) | 2023-10-18 |
Family
ID=78819464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21815933.3A Pending EP4259938A1 (de) | 2020-12-14 | 2021-11-15 | Pumpenanordnung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12188485B2 (de) |
| EP (1) | EP4259938A1 (de) |
| JP (1) | JP2023554045A (de) |
| CN (1) | CN116583675A (de) |
| DE (1) | DE102020133327B4 (de) |
| WO (1) | WO2022128282A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024131827A1 (de) | 2024-10-31 | 2026-04-30 | KSB SE & Co. KGaA | Kreiselpumpe mit einem Laufrad |
| DE102024131806A1 (de) | 2024-10-31 | 2026-04-30 | KSB SE & Co. KGaA | Kreiselpumpe mit einem Laufrad |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277223A (en) * | 1979-11-29 | 1981-07-07 | Guy F. Atkinson Company | Case construction for multi-stage pump |
| JPS60131700U (ja) * | 1984-02-10 | 1985-09-03 | 株式会社 川本製作所 | 多段ポンプ |
| JP3299638B2 (ja) * | 1994-09-20 | 2002-07-08 | 株式会社日立製作所 | ターボ流体機械 |
| JP3352924B2 (ja) * | 1997-09-30 | 2002-12-03 | 株式会社荏原製作所 | 流体機械 |
| JPH11351176A (ja) * | 1998-06-15 | 1999-12-21 | Hitachi Ltd | バーレルケーシング型タービンポンプ |
| DE19927135A1 (de) | 1999-06-15 | 2000-12-21 | Ksb Ag | Entlastungseinrichtung für mehrstufige Kreiselpumpen |
| DE19952605A1 (de) * | 1999-11-02 | 2001-05-10 | Luk Fahrzeug Hydraulik | Pumpe für ein flüssiges oder gasförmiges Medium |
| IT1314627B1 (it) * | 2000-05-02 | 2002-12-20 | Caprari Spa | Dispositivo di bloccaggio del pacco statorico di elettropompe |
| JP4844341B2 (ja) * | 2006-10-16 | 2011-12-28 | 株式会社日立プラントテクノロジー | 多段ディフューザポンプ |
| JP5524109B2 (ja) * | 2011-02-25 | 2014-06-18 | 三菱重工コンプレッサ株式会社 | 圧縮機 |
| EP2815129B1 (de) * | 2012-02-14 | 2021-08-25 | Sulzer Management AG | Dichtungsanordnung und pumpe mit einer dichtungsanordnung |
| US9593694B2 (en) * | 2014-04-04 | 2017-03-14 | Sulzer Management Ag | Pump |
| DE102019001882A1 (de) | 2019-03-19 | 2020-09-24 | KSB SE & Co. KGaA | Mantelgehäusepumpe und Herstellungsverfahren für eine Mantelgehäusepumpe |
-
2020
- 2020-12-14 DE DE102020133327.7A patent/DE102020133327B4/de active Active
-
2021
- 2021-11-15 US US18/266,845 patent/US12188485B2/en active Active
- 2021-11-15 EP EP21815933.3A patent/EP4259938A1/de active Pending
- 2021-11-15 WO PCT/EP2021/081670 patent/WO2022128282A1/de not_active Ceased
- 2021-11-15 JP JP2023536143A patent/JP2023554045A/ja active Pending
- 2021-11-15 CN CN202180083978.7A patent/CN116583675A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022128282A1 (de) | 2022-06-23 |
| CN116583675A (zh) | 2023-08-11 |
| DE102020133327B4 (de) | 2023-01-19 |
| DE102020133327A1 (de) | 2022-06-15 |
| US20240102487A1 (en) | 2024-03-28 |
| US12188485B2 (en) | 2025-01-07 |
| JP2023554045A (ja) | 2023-12-26 |
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