US20190063450A1 - Centrifugal pump with balancing device and a method of balancing axial forces of the centrifugal pump - Google Patents

Centrifugal pump with balancing device and a method of balancing axial forces of the centrifugal pump Download PDF

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Publication number
US20190063450A1
US20190063450A1 US16/081,471 US201716081471A US2019063450A1 US 20190063450 A1 US20190063450 A1 US 20190063450A1 US 201716081471 A US201716081471 A US 201716081471A US 2019063450 A1 US2019063450 A1 US 2019063450A1
Authority
US
United States
Prior art keywords
balancing
disc
axial
centrifugal pump
counter
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.)
Abandoned
Application number
US16/081,471
Other languages
English (en)
Inventor
Matti Koivikko
Kalle TIITINEN
Hannu HEISKANEN
Teemu GASMAN
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.)
Sulzer Management AG
Original Assignee
Sulzer Management AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sulzer Management AG filed Critical Sulzer Management AG
Assigned to SULZER MANAGEMENT AG reassignment SULZER MANAGEMENT AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEISKANEN, Hannu, Tiitinen, Kalle, KOIVIKKO, MATTI, GASMAN, Teemu
Publication of US20190063450A1 publication Critical patent/US20190063450A1/en
Abandoned legal-status Critical Current

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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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic
    • F04D29/0473—Bearings hydrostatic; hydrodynamic for radial 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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • 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
    • 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

  • FIG. 8 illustrates a detailed axial cross section of the balancing device in accordance with a fourth preferred embodiment of the present invention.
  • the disc While the liquid in the gap is evaporated, the disc loses its load carrying capability at least partially at the area of the counter ring 26 as the vapor escapes from the gap 36 ′ very quickly.
  • the loss of load carrying capability allows the shaft 18 to move towards the pump inlet, whereby the non-axial counter surfaces 50 and 52 may end up into contact in substantially dry conditions.
  • the non-axial counter surfaces contact the power consumption increases rapidly, the friction heats the non-axial counter surfaces, and may at its worst damage the surfaces.
  • the resistance to flow between the inner and outer circumference of the counter ring 26 is increased such that the liquid entering the thin gap 36 ′ between the counter ring 26 and the balancing disc 22 sees only the pressure difference between the entrance to the thin gap 36 ′ and the first groove 54 , whereby the velocity of the liquid induced by that particular pressure difference is smaller than in such a case that the total pressure difference would act in the liquid.
  • the local pressure in the thin gap 36 ′ is high enough for not allowing the liquid to evaporate.
  • the flow velocity of the liquid in each groove is reduced close to nil, as the height or thickness of the flow cross section is suddenly changed from that of the thin gap 36 ′, i.e.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US16/081,471 2016-03-17 2017-03-06 Centrifugal pump with balancing device and a method of balancing axial forces of the centrifugal pump Abandoned US20190063450A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP16160876 2016-03-17
EP16160876.5 2016-03-17
PCT/EP2017/055118 WO2017157702A1 (en) 2016-03-17 2017-03-06 A centrifugal pump with balancing means and a method of balancing axial forces of the centrifugal pump

Publications (1)

Publication Number Publication Date
US20190063450A1 true US20190063450A1 (en) 2019-02-28

Family

ID=55542571

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/081,471 Abandoned US20190063450A1 (en) 2016-03-17 2017-03-06 Centrifugal pump with balancing device and a method of balancing axial forces of the centrifugal pump

Country Status (6)

Country Link
US (1) US20190063450A1 (ru)
EP (1) EP3430270B1 (ru)
CN (1) CN108779782A (ru)
BR (1) BR112018068267A2 (ru)
RU (1) RU2018132444A (ru)
WO (1) WO2017157702A1 (ru)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116447166A (zh) * 2023-04-19 2023-07-18 烟台东德实业有限公司 一种空气压缩机叶轮轴向力平衡方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019206580A1 (en) 2018-04-25 2019-10-31 Sulzer Management Ag A balance ring, a balancing device, a centrifugal pump and a method of balancing an axial thrust of the centrifugal pump
CN109058103A (zh) * 2018-09-25 2018-12-21 宁波鲍斯能源装备股份有限公司 喷水式螺杆压缩机
DE102019001120A1 (de) * 2019-02-15 2020-08-20 KSB SE & Co. KGaA Entlastungseinrichtung
CN114508393B (zh) * 2021-12-27 2023-07-18 东方电气集团东方汽轮机有限公司 甩负荷时轴向推力为零的汽缸、一次及二次再热汽轮机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1499056A (en) * 1922-07-05 1924-06-24 Hollander Aladar Centrifugal pump
DE539225C (de) * 1931-11-26 Georg Weyland Axialschubentlastung mittels stufenfoermiger Entlastungsscheiben
DE1082803B (de) * 1957-04-27 1960-06-02 Rudolf Duemmerling Entlastungsscheibenpaar fuer mehrstufige Kreiselpumpen
US6981799B2 (en) * 2000-11-24 2006-01-03 Ksb Aktiengesellschaft Slide bearing for a centrifugal pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE470581C (de) * 1924-05-15 1929-01-22 Ernst Holland Vorrichtung zur Axialdruckentlastung
DE867933C (de) * 1941-03-09 1953-03-05 Siemens Ag Pump-Spaltdichtung
US6309174B1 (en) * 1997-02-28 2001-10-30 Fluid Equipment Development Company, Llc Thrust bearing for multistage centrifugal pumps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE539225C (de) * 1931-11-26 Georg Weyland Axialschubentlastung mittels stufenfoermiger Entlastungsscheiben
US1499056A (en) * 1922-07-05 1924-06-24 Hollander Aladar Centrifugal pump
DE1082803B (de) * 1957-04-27 1960-06-02 Rudolf Duemmerling Entlastungsscheibenpaar fuer mehrstufige Kreiselpumpen
US6981799B2 (en) * 2000-11-24 2006-01-03 Ksb Aktiengesellschaft Slide bearing for a centrifugal pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116447166A (zh) * 2023-04-19 2023-07-18 烟台东德实业有限公司 一种空气压缩机叶轮轴向力平衡方法

Also Published As

Publication number Publication date
RU2018132444A3 (ru) 2020-05-19
RU2018132444A (ru) 2020-04-17
EP3430270B1 (en) 2019-11-13
CN108779782A (zh) 2018-11-09
BR112018068267A2 (pt) 2019-01-15
WO2017157702A1 (en) 2017-09-21
EP3430270A1 (en) 2019-01-23

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