EP3224483B1 - Pompe centrifuge avec dispositif de guidage - Google Patents

Pompe centrifuge avec dispositif de guidage Download PDF

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Publication number
EP3224483B1
EP3224483B1 EP15798458.4A EP15798458A EP3224483B1 EP 3224483 B1 EP3224483 B1 EP 3224483B1 EP 15798458 A EP15798458 A EP 15798458A EP 3224483 B1 EP3224483 B1 EP 3224483B1
Authority
EP
European Patent Office
Prior art keywords
impeller
guide
centrifugal pump
flow
guide device
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.)
Active
Application number
EP15798458.4A
Other languages
German (de)
English (en)
Other versions
EP3224483A1 (fr
Inventor
Annika FLEDER
Björn WILL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB SE and Co KGaA
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KSB SE and Co KGaA
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Publication date
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP3224483A1 publication Critical patent/EP3224483A1/fr
Application granted granted Critical
Publication of EP3224483B1 publication Critical patent/EP3224483B1/fr
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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
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/548—Specially 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved

Definitions

  • the invention relates to a centrifugal pump according to the preamble of claim 1.
  • the centrifugal pump has at least one impeller which is designed as a radial impeller and discharges axially and which is followed by a guide device.
  • the guide device has guide vanes. Guide channels for the pumped medium are formed between the guide vanes. Such guide devices can be designed as guide wheels.
  • the pumped medium emerging from the impeller enters the guide device. In the guide device, kinetic energy is converted into pressure energy. The medium is also redirected. The swirl is often reduced for the purpose of an inflow to a next stage.
  • the DE 198 22 223 A1 describes a multistage centrifugal pump. Impellers are arranged rotating in the stage casing of the centrifugal pump. The pumped medium flows to a first impeller and experiences an increase in pressure as a result. Downstream of the impeller is a stator part with which speed energy is converted into pressure energy. The stator part also deflects the conveying medium in its flow direction.
  • the DE 33 15 350 C2 relates to a stator for centrifugal pumps with diffuser-shaped widened guide channels.
  • the outer radial guide channel delimitation is formed by a housing that accommodates the guide wheel.
  • the JP H11 173296 A discloses a centrifugal pump according to the preamble of claim 1.
  • a diffuser device of a pump with a radial impeller which is connected to an outlet pipe, the diffuser device having two diffuser housings connected to one another.
  • stages of high-pressure centrifugal pumps have very large stage diameters in relation to the outer diameter of the impeller.
  • the inside diameter of the step is often more than a factor of 1.5 larger than the impeller diameter.
  • the flow is delayed in a diffuser.
  • the reduction of the peripheral speed component takes place in a return blading.
  • the U.S. 2,857,849 A discloses a pump unit with a motor housing which is provided with a plurality of circumferentially spaced through channels which extend in the longitudinal direction of the motor housing.
  • An impeller has impeller channels which allow the fluid to be conveyed to flow axially into the through channels.
  • the object of the invention is to specify a centrifugal pump with 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 guaranteed.
  • the centrifugal pump should be characterized by a construction that is as inexpensive as possible and a reliable mode of operation. Furthermore, the longest possible service life should be guaranteed.
  • additional guide elements are arranged at the outlet of at least some of the guide channels.
  • This integration of the guide elements in the guide device significantly reduces flow separation.
  • the guide elements increase the stage efficiency noticeably.
  • the guide elements open up new freedom in the construction of the guide device. For example, it is possible that the guide vanes have to be less curved at the outlet. With conventional centrifugal pumps, a strong deflection at the stator outlet was necessary, because the flow coming from the stator is in great danger of detachment in this area and therefore the flow must not be diverted here. Therefore, in conventional centrifugal pumps, the guide vanes had to be strongly curved in the area of small radii in order to still implement a deflection.
  • the guide elements are designed as blades which at least partially protrude into the guide channels.
  • the guide elements thus form intercut blades.
  • the guide vanes of the stator extend from an inlet to an outlet.
  • the inlet and outlet of the guide device are defined as the inlet and outlet into the guide channels that are formed between the guide vanes.
  • the guide elements designed as intermediate-cut blades are arranged at the outlet of at least some of the guide channels and still protrude into the guide channels. According to the invention, these intermediate cut blades extend from the outlet of the guide channels in the direction of flow to the next stage.
  • the guide elements have a curvature for deflecting the flow.
  • the curved intermediate blades which initially overlap with the guide blades, significantly reduce flow separation and thus increase the efficiency of the centrifugal pump. This saves operating costs. Furthermore, wear effects are prevented as a result, so that the centrifugal pump according to the invention is less susceptible to repair and has a long service life.
  • the impeller is designed as a radial wheel and axially pouring out.
  • Such impellers are also referred to as hermaphroditic impellers. While in conventional radial impellers the flow is discharged in the radial direction, the outflow in a hermaphrodite impeller is axially directed. This results in an S-run in the meridional section of the hybrid impeller.
  • the flow is then decelerated and deflected in a single component and the swirl is reduced for the purpose of flow to the next stage.
  • the inventive combination of a hermaphroditic impeller with an adjoining guide device, which has guide elements, enables a compact design of the centrifugal pump with minimal step diameters and at the same time ensures low-loss deceleration and an improvement in the outflow.
  • a centrifugal pump is thus created which, despite its compact design, has a high degree of efficiency. This considerably improves the flow to the next stage.
  • the impeller preferably has a cover disk.
  • the impeller is therefore a closed impeller in which the fluid enters in the axial direction, is then deflected radially, but is finally poured out axially as a result of the S-shaped meridian. It proves to be advantageous if the impeller has a support disk.
  • the support disk is preferably turned off at least in some areas. By turning off the outer area of the support disk, an axial distribution is made possible. The result is an S-shaped meridional section. The design leads to a reduced step diameter. This saves material.
  • the guide device is firmly connected to the pump housing or can be formed by the step housing itself.
  • Figure 1 shows an example of a section of a multistage centrifugal pump.
  • the pump comprises several stages connected in series, of which in Figure 1 one stage is shown as an example.
  • An impeller 1 is arranged on a shaft 2.
  • a stage housing 3 surrounds the impeller 1.
  • a fluid flows into the impeller 1 in the axial direction, is then deflected in a radial direction and finally leaves the impeller 1 again in the axial direction.
  • the fluid then flows into a guide device 4, which in the exemplary embodiment is designed as a guide wheel and is formed by the stage housing 3.
  • the impeller 1 has a cover disk 5 and a support disk 6.
  • the support disk 6 is turned off in its outer area.
  • the cover disk 5 extends further in the radial direction than the support disk 6.
  • the name hybrid impeller comes from the fact that it is a radial impeller in which the outflow is directed axially. This is made possible by turning the support disk 6 in its outer area.
  • a space 10 is present between the impeller 1 and the guide device 4. This is a wheel side space.
  • Figure 2 shows a perspective view of the impeller 1, which is arranged on a shaft 2.
  • the delivery medium flows from the impeller 1 into the guide device 4.
  • the guide device 4 comprises guide vanes 7.
  • Guide channels 8 are formed between adjacent guide vanes 7.
  • guide elements 9 are arranged at the outlet of the guide channels 8.
  • Figure 4 shows a perspective view of the guide device 4. It can be seen that the guide elements 9 are designed as blades. These have a curvature to deflect the flow. According to the invention, the guide elements protrude at least partially into the guide channels 8. The guide elements 9 extend, starting from the outlet of the guide channels 8, increasingly downstream in the axial direction.
  • FIGS. 5a , 5b and 5c show flow vectors on three different cutting planes from a flow simulation.
  • the guide elements 9 ensure that the flow is deflected in the axial direction.
  • a hermaphrodite hydraulic system consisting of an impeller 1, which is designed as a hermaphroditic impeller, a guide device 4, which is designed as a hermaphroditic stator, and the integration of guide elements 9, which are arranged as intermediate-cut blades at the stator outlet, leads to a centrifugal pump that has a compact design and has a high level of efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Pompe centrifuge comprenant au moins une roue mobile (1) configurée en tant que roue radiale et déchargeant axialement, qui est suivie d'un dispositif de conduction (3), qui comprend des pales de conduction (7), entre lesquelles des canaux de conduction (8) sont formés, des éléments de guidage (9) étant agencés à la sortie d'au moins une partie des canaux de conduction (8), qui sont configurés en tant que boucles, s'enfoncent au moins partiellement dans les canaux de conduction (8) et présentent une courbure pour la déviation de l'écoulement, caractérisée en ce que les éléments de guidage (9) s'étendent à partir de la sortie des canaux de conduction (8) vers l'aval de plus en plus dans la direction axiale.
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce que la roue mobile (1) comprend un disque de recouvrement (5).
  3. Pompe centrifuge selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que la roue mobile (1) comprend un disque porteur (6).
  4. Pompe centrifuge selon la revendication 3, caractérisée en ce que le disque porteur (6) présente dans la direction radiale un plus petit diamètre que le disque de recouvrement (5).
  5. Pompe centrifuge selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'un espace (10) est agencé entre la roue mobile (1) et le dispositif de conduction (4).
  6. Pompe centrifuge selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le dispositif de conduction (4) est relié de manière fixe avec une partie de boîtier de pompe.
EP15798458.4A 2014-11-25 2015-11-24 Pompe centrifuge avec dispositif de guidage Active EP3224483B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014223942.7A DE102014223942A1 (de) 2014-11-25 2014-11-25 Kreiselpumpe mit einer Leiteinrichtung
PCT/EP2015/077514 WO2016083382A1 (fr) 2014-11-25 2015-11-24 Pompe centrifuge à dispositif directeur

Publications (2)

Publication Number Publication Date
EP3224483A1 EP3224483A1 (fr) 2017-10-04
EP3224483B1 true EP3224483B1 (fr) 2021-09-29

Family

ID=54697584

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15798458.4A Active EP3224483B1 (fr) 2014-11-25 2015-11-24 Pompe centrifuge avec dispositif de guidage
EP15798457.6A Withdrawn EP3224481A1 (fr) 2014-11-25 2015-11-24 Pompe centrifuge à rotor radial à déversement axial

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15798457.6A Withdrawn EP3224481A1 (fr) 2014-11-25 2015-11-24 Pompe centrifuge à rotor radial à déversement axial

Country Status (4)

Country Link
EP (2) EP3224483B1 (fr)
DE (1) DE102014223942A1 (fr)
DK (1) DK3224483T3 (fr)
WO (2) WO2016083382A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108953158A (zh) * 2018-09-20 2018-12-07 浙江南元泵业有限公司 多出口离心泵
CN113074138B (zh) * 2020-01-06 2022-05-17 广东威灵电机制造有限公司 扩压装置、风机及吸尘器
RU2735978C1 (ru) * 2020-06-24 2020-11-11 Игорь Олегович Стасюк Ступень многоступенчатого лопастного насоса
RU2754049C1 (ru) * 2020-12-12 2021-08-25 Игорь Олегович Стасюк Ступень лопастного многоступенчатого насоса
DE102020133459A1 (de) 2020-12-15 2022-06-15 KSB SE & Co. KGaA Herstellung eines Diffusors als Gruppe von Kanälen
RU206628U1 (ru) * 2021-03-06 2021-09-17 Игорь Олегович Стасюк Ступень лопастного многоступенчатого насоса диагонально-овального типа

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1771711A (en) * 1928-01-19 1930-07-29 Voith Gmbh J M Split guide blade for centrifugal pumps
GB489318A (en) * 1937-07-30 1938-07-25 Cebert Boardman Improvements in centrifugal pumps and motors
US2857849A (en) * 1953-11-13 1958-10-28 Joseph R Smylie Motor driven pumping units
US3398694A (en) * 1966-08-11 1968-08-27 Marine Constr & Design Co Submersible pump device for net brailing
DE3315350C2 (de) 1983-04-28 1985-10-03 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Leitrad für Kreiselpumpen
JPH01318790A (ja) * 1988-06-17 1989-12-25 Hitachi Ltd 多段ポンプの水返し羽根
DE3912279A1 (de) 1989-04-14 1990-10-18 Klein Schanzlin & Becker Ag Leitrad fuer kreiselpumpen
DE3943273C2 (de) * 1989-12-29 1996-07-18 Klaus Union Armaturen Horizontal angeordnete Kreiselpumpe mit Spaltrohrmagnetkupplung
JPH11173296A (ja) * 1997-12-11 1999-06-29 Ebara Corp ポンプのディフューザ装置
DE19822223C5 (de) 1998-05-18 2005-09-15 Kaefer Isoliertechnik Gmbh & Co Kg Betonfräse zum Fräsen von, insbesondere beschichteten, Beton- oder Estrichböden
NL1009759C2 (nl) * 1998-07-28 2000-02-01 Vogel Willi Ag Rotatie-inrichting.
CN103591051A (zh) * 2013-11-07 2014-02-19 江苏大学 一种具有副叶片的空间导叶

Also Published As

Publication number Publication date
WO2016083381A1 (fr) 2016-06-02
DK3224483T3 (da) 2021-12-06
EP3224481A1 (fr) 2017-10-04
EP3224483A1 (fr) 2017-10-04
DE102014223942A1 (de) 2016-06-30
WO2016083382A1 (fr) 2016-06-02

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