US3819293A - Centrifugal pump for corrosive liquids - Google Patents

Centrifugal pump for corrosive liquids Download PDF

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Publication number
US3819293A
US3819293A US00260291A US26029172A US3819293A US 3819293 A US3819293 A US 3819293A US 00260291 A US00260291 A US 00260291A US 26029172 A US26029172 A US 26029172A US 3819293 A US3819293 A US 3819293A
Authority
US
United States
Prior art keywords
shaft
housing
pump
impeller
outlet
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.)
Expired - Lifetime
Application number
US00260291A
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English (en)
Inventor
F Zitzmann
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.)
ZUR FORDERUNG DER WISSENSCHAFT
ZUR FORDERUNG DER WISSENSCHAFTEN EV DT
Original Assignee
ZUR FORDERUNG DER WISSENSCHAFT
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 ZUR FORDERUNG DER WISSENSCHAFT filed Critical ZUR FORDERUNG DER WISSENSCHAFT
Application granted granted Critical
Publication of US3819293A publication Critical patent/US3819293A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/18—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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/022—Units comprising pumps and their driving means containing a coupling a coupling allowing slip, e.g. torque converter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/026—Details of the 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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/027—Details of the magnetic circuit
    • 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
    • F04D29/2238—Special flow patterns
    • F04D29/2255—Special flow patterns flow-channels with a special cross-section contour, e.g. ejecting, throttling or diffusing effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/21—Oxide ceramics
    • F05D2300/2102—Glass

Definitions

  • This invention relates to a centrifugal pump for corrosive liquids and is of the type that has a housing which contains an inlet opening and an outlet opening as well as an impeller which is secured to a shaft which, in turn, is coupled to a drive means.
  • the particular purpose of the present invention is to provide a circulating pump for liquid lasers which work with POCl and SeOC1 as the stimulating medium.
  • these laser media are very corrosive and furthermore, since impurities have to be carefully avoided, these materials can be allowed to contact only glass or possibly polytetrafluoroethylene.
  • the glass centrifugal pumps available in commerce are not adapted for the aforenoted use since the delivered medium may contact materials other than glass.
  • the impellerand the closure plates provided with sealing rings are made of glass.
  • the shaft to which the impeller is affixed is brought out of the housing through a sealing assembly and is directly connected to a drive motor.
  • the centrifugal pump has a glass housing which is sealed except for a liquid inlet at the low pressure side and a liquid outlet at the high pressure side, a glass shaft rotatably supported within the housing and carrying an impeller, a ferromagnetic body sealed into said shaft and means arranged externally of the pump housing for generating a rotary magnetic field to impart rotation on said ferromagnetic body, said shaft and said impeller.
  • FIG. 1 is an axial sectional view of the preferred embodiment
  • FIG. 2 is a front elevational view of the preferred embodiment as seen from the right-hand side of FIG. 1 and FIG. 3 is a diagram illustrating the pressure head as a function of the output flow rate of a pump according to the invention.
  • the centrifugal pump shown comprises a pump unit and a drive unit 12.
  • the pump unit 10 has a glass housing 14 which, with the exception of an inlet opening 16 at the low pressure side and an outlet opening 18 at the high pressure side is closed in a vacuum tight manner. Entirely within the housing 14 there is disposed a glass shaft 20 which,
  • a glass impeller 22 which is centered with respect to the shaft 20 and which has a hollow'hub portion 22a axially open at one side towards the inlet opening 16.
  • the hub portion 220 2 supports a plurality of integral radial impeller tubes 22b.
  • the pump impeller is located in an enlarged cylindrical housing portion 14b which contains the outlet opening 18.
  • the latter is so positioned that the arcuately ground open ends of the impeller tubes 22b register sequentially therewith during operation of the pump.
  • the distance between the outer end of each impeller tube 22b and the internal wall of the cylindrical part 14b is preferably small; in case of an internal diameter of the cylindrical part 14b of mm, it may be approximately 0.2 mm.
  • the cylindrical housing portion 14b continues in a conical housing portion into which merges the inlet opening 16.
  • an axial glass pin 24 which limits a rightward axial displacement of the shaft 20.
  • a ferromagnetic (for example, ferrite) body 26 In a jacket-like enlargement 28 of that end of the shaft 20 which is remote from the impeller 22, there is disposed a ferromagnetic (for example, ferrite) body 26.
  • the jacket 28 has a ground, cylindrical outer face coaxial with the shaft axis and the housing portion l4e surrounding the jacket 28 has a ground cylindrical inner face, also coaxial with the shaft axis.
  • An axial protrusion 30 provided on the enlargement 28 cooperates with a housing portion 14d to limit a leftward axial displacement of the shaft 20.
  • the housing 14 is sealed closed in a vacuum tight manner at the housing portion 14d.
  • a removable polytetrafluorethylene closure it is feasible to provide, for example, a removable polytetrafluorethylene closure so that the portion of the housing 14 that contains the ferromagnetic body 26 may be easily emptied and cleaned.
  • the pump unit is supported by a stand 31 which is connected with the mid portion 14a of the housing.
  • the pump shown in the drawing is preferably operated in a horizontal position.
  • the drive unit 12 contains a second ferromagnetic body 32 which is supported in a cup-shaped member 34 which, in turn, is coupled to a motor means, not shown. At least one of the two bodies 26, 32 is a permanent magnet, so that the rotary motion of the body 32, by virtue of the rotating magnetic field, can be transmitted through the glass housing 14 and the jacket 28 to the body 26 and thus to the shaft 20 and the impeller 22. It is seen that the pump 10 and the drive assembly 12 are separate, unconnected units; accordingly, they are replaceable independently of one another.
  • the shaft 20' has a relatively large axial play (for example, 3 mm) and the impeller 22 is so positioned with respect to the outlet opening 18 and the body 26 with respect to the body 32 that during the operation of the pump the impeller tubes 2212 will be in axial alignment with the outlet opening 18 as they sequentially register therewith and, at the same time, the means that limit the axial displacement of the shaft 20 remain out of contact therewith.
  • a relatively large axial play for example, 3 mm
  • the pump housing is filled with the medium to be delivered which, at the same time, serves to lubricate the bearing faces of the shaft 20 and the tubular housing portion 14a.
  • the shaft 20 or the inner wall of the tubular part 14a may have one or more generally axially extending longitudinal grooves to permit a more rapid vacuumization of the pump housing, a more uniform lubrication of the shaft 20 and, if necessary, removal of foreign bodies.
  • components 151 example 2nd example 3rd example part 14b 75 mm inner dia. 64 mm inner dia. 90 mm inner dia.
  • a centrifugal pump particularly for corrosive liquids comprising A. a glass pump housing having 1. an inlet at its low pressure side,
  • said pump housing being permanently sealed in a vacuum tight manner over its entire area, except for said inlet and outlet,
  • a centrifugal pump as defined in claim 2 said glass jacket having a ground outer face coaxial with the axis of said shaft and said housing having a portion surrounding said jacket, said last-named portion including a ground inner face coaxial with said axis.
  • a centrifugal pump particularly for corrosive fluids comprising:
  • an all glass integral pump housing means defining an elongated tubular bearing means, a pumping chamber on one end of said tubular bearing means and having an inlet and an outlet, and closure means adjacent said tubular bearing means, said tubular bearing means and said closure means all open to the corrosive fluid in said pumping chamber, and said housing means further being completely sealed except for said inlet and said outlet so said corrosive fluid is completely contained in said housing means,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00260291A 1971-06-07 1972-06-06 Centrifugal pump for corrosive liquids Expired - Lifetime US3819293A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2128265A DE2128265A1 (de) 1971-06-07 1971-06-07 Kreiselpumpe fuer korrosive fluessigkeiten

Publications (1)

Publication Number Publication Date
US3819293A true US3819293A (en) 1974-06-25

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ID=5810099

Family Applications (1)

Application Number Title Priority Date Filing Date
US00260291A Expired - Lifetime US3819293A (en) 1971-06-07 1972-06-06 Centrifugal pump for corrosive liquids

Country Status (4)

Country Link
US (1) US3819293A (enExample)
DE (1) DE2128265A1 (enExample)
FR (1) FR2141225A5 (enExample)
GB (1) GB1379267A (enExample)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969043A (en) * 1974-01-04 1976-07-13 Little Giant Corporation Process cooled submersible pump and motor assembly
US4043706A (en) * 1973-06-05 1977-08-23 Alan John Walker Bearing support structure for electro-magnet driven pump
US4102610A (en) * 1976-09-03 1978-07-25 John Taboada Constant volume seal-free reciprocating pump
US4226548A (en) * 1978-08-21 1980-10-07 Steam Stores, Inc. Parts cleaning apparatus
US4363631A (en) * 1979-06-07 1982-12-14 Feldmuhle Aktiengesellschaft Structural arrangement for oxide ceramic shafts
DE3413930A1 (de) * 1984-04-13 1985-10-31 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Kreiselpumpe
US4780066A (en) * 1986-06-04 1988-10-25 Sulzer Brothers Limited Centrifugal pump having a magnetic coupling
US6095770A (en) * 1995-12-08 2000-08-01 Aisan Kogyo Kabushiki Kaisha Magnetically coupled pump
US6672409B1 (en) 2000-10-24 2004-01-06 The Charles Machine Works, Inc. Downhole generator for horizontal directional drilling
US6739413B2 (en) 2002-01-15 2004-05-25 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
US7347283B1 (en) 2002-01-15 2008-03-25 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
WO2010136019A1 (de) * 2009-05-27 2010-12-02 Dst Dauermagnet-System Technik Gmbh Magnetkupplung sowie spalttopf für eine magnetkupplung
CN102371214A (zh) * 2010-08-19 2012-03-14 珠海市洁星洗涤科技有限公司 磁驱动密封式离心机
CN102478007A (zh) * 2010-11-30 2012-05-30 贵州省鼓风机厂 一种耐强腐蚀性气体通风机及其制作方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534740C3 (de) * 1975-08-04 1983-02-03 Franz 4630 Bochum Klaus Spaltrohrkreiselpumpe
JP3315224B2 (ja) * 1993-12-09 2002-08-19 千寿製薬株式会社 微小流量ポンプ
CN116163963B (zh) * 2023-01-02 2025-08-01 广东深鹏科技股份有限公司 电子水泵、电子水泵的装配方法及新能源汽车

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB901160A (en) * 1959-10-08 1962-07-18 Q V F Ltd Improvements in or relating to centrifugal pumps
US3411450A (en) * 1967-03-07 1968-11-19 Little Giant Corp Pump
US3558238A (en) * 1967-10-06 1971-01-26 Koninkl Nl Maschf Voorheen E H Centrifugal pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB901160A (en) * 1959-10-08 1962-07-18 Q V F Ltd Improvements in or relating to centrifugal pumps
US3411450A (en) * 1967-03-07 1968-11-19 Little Giant Corp Pump
US3558238A (en) * 1967-10-06 1971-01-26 Koninkl Nl Maschf Voorheen E H Centrifugal pumps

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043706A (en) * 1973-06-05 1977-08-23 Alan John Walker Bearing support structure for electro-magnet driven pump
US3969043A (en) * 1974-01-04 1976-07-13 Little Giant Corporation Process cooled submersible pump and motor assembly
US4102610A (en) * 1976-09-03 1978-07-25 John Taboada Constant volume seal-free reciprocating pump
US4226548A (en) * 1978-08-21 1980-10-07 Steam Stores, Inc. Parts cleaning apparatus
US4363631A (en) * 1979-06-07 1982-12-14 Feldmuhle Aktiengesellschaft Structural arrangement for oxide ceramic shafts
DE3413930A1 (de) * 1984-04-13 1985-10-31 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Kreiselpumpe
DE3413930C2 (enExample) * 1984-04-13 1987-08-20 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim, De
US4780066A (en) * 1986-06-04 1988-10-25 Sulzer Brothers Limited Centrifugal pump having a magnetic coupling
US6095770A (en) * 1995-12-08 2000-08-01 Aisan Kogyo Kabushiki Kaisha Magnetically coupled pump
US6672409B1 (en) 2000-10-24 2004-01-06 The Charles Machine Works, Inc. Downhole generator for horizontal directional drilling
US6739413B2 (en) 2002-01-15 2004-05-25 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
US20050056460A1 (en) * 2002-01-15 2005-03-17 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
US7025152B2 (en) 2002-01-15 2006-04-11 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
US7347283B1 (en) 2002-01-15 2008-03-25 The Charles Machine Works, Inc. Using a rotating inner member to drive a tool in a hollow outer member
WO2010136019A1 (de) * 2009-05-27 2010-12-02 Dst Dauermagnet-System Technik Gmbh Magnetkupplung sowie spalttopf für eine magnetkupplung
US20110234035A1 (en) * 2009-05-27 2011-09-29 Heinrich Wittschier Magnetic coupling and split case for a magnetic coupling
CN102301572A (zh) * 2009-05-27 2011-12-28 Dst永久磁铁系统技术有限公司 磁耦合器以及用于磁耦合器的缝隙罐
JP2012528555A (ja) * 2009-05-27 2012-11-12 デーエステー ダウアーマグネート―ズュステームテヒニーク ゲゼルシャフト ミット ベシュレンクテル ハフツング 電磁継手、並びに電磁継手のための分割型ケース
CN102371214A (zh) * 2010-08-19 2012-03-14 珠海市洁星洗涤科技有限公司 磁驱动密封式离心机
CN102478007A (zh) * 2010-11-30 2012-05-30 贵州省鼓风机厂 一种耐强腐蚀性气体通风机及其制作方法

Also Published As

Publication number Publication date
GB1379267A (en) 1975-01-02
FR2141225A5 (enExample) 1973-01-19
DE2128265A1 (de) 1973-01-04

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