US3736075A - Pump and filter unit - Google Patents

Pump and filter unit Download PDF

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Publication number
US3736075A
US3736075A US00115265A US3736075DA US3736075A US 3736075 A US3736075 A US 3736075A US 00115265 A US00115265 A US 00115265A US 3736075D A US3736075D A US 3736075DA US 3736075 A US3736075 A US 3736075A
Authority
US
United States
Prior art keywords
pump
filter
driven magnet
chamber
liquid
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
US00115265A
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English (en)
Inventor
W J Otto
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.)
SETHCO MANUF CORP
Original Assignee
SETHCO MANUF CORP
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 SETHCO MANUF CORP filed Critical SETHCO MANUF CORP
Application granted granted Critical
Publication of US3736075A publication Critical patent/US3736075A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/14—Shaft sealings operative only when pump is inoperative
    • F04D29/146—Shaft sealings operative only when pump is inoperative 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • a pump impeller is rotated by a motor through mag- [52] 11.8.
  • the 417/424 driven magnet rotates with the impeller and is located [51] Int. Cl. ..F04b 35/04 in a chamber defined by a cup-shaped partition inter- [58] Field of Search ..417/370, 420,313, posed between the two magnets.
  • the impeller draws 417/369, 366; 415/121 G dirty liquid through the pump inlet and delivers it to a filter housing in which the liquid is filtered.
  • This invention relates to combined centrifugal pump and filter units, and more particularly to such units wherein the impeller of the pump is rotated via two magnetically coupled magnets.
  • Centrifugal pumps in which a magnetic coupling is used to transmit rotation of a motor shaft to the pump impeller are known.
  • a driving magnet rotates with the motor shaft and a driven magnet rotates with the impeller, the magnets being separated by a thin non-magnetic stationary partition.
  • the partition forms part of a liquid-tight sealing means which prevents any of the liquid being pumped from reaching the motor,'thereby saving the motor from possible damage, although of course the liquid does come into contact with the driven magnet.
  • the strength of attraction between the two magnets of the coupling depends to a great extent upon the distance between the magnets; the closer the magnets, the stronger the attraction between them.
  • the partition is made as thin as possible, and the magnets are arranged as close as possible to the opposite sides of the partition.
  • This critical minimum spacing requirement must be dealt with regardless of what type of liquid is being pumped.
  • the pump is used to force such a liquid through a filter to filter out the particles from the liquid.
  • the liquid being pumped ordinarily comes into contact with the driven magnet, and when this liquid carries solid particles, the particles become lodged between the driven magnet and the partition.
  • the particles build up in this very narrow space, they apply a braking force to the driven magnet which can slow the latter enough to break the magnetic coupling, thereby allowing the driving magnet to rotate freely while the impeller comes to a halt. If the magnetic coupling is strong enough, jamming of the driven magnet by the particles can cause the motor to stall and be damaged.
  • Three ears 14 project outwardly from the upper end of support 11 and a flange 15 projects outwardly from the lower end of filter hous ing 13.
  • Three bolts 16 extend through ears 14 and into flange 15 to hold together the assembly of support 11, pump body 12 and filter housing 13. Suitable seals 17 are provided to make the connections liquid tight.
  • the upper end of support 11 and the lower end of pump body 12 are formed with interior recesses which together snugly accommodate the peripheral edge of a circular plate 18 and the peripheral edge of a flange 19 projecting outwardly from the top of a cup-shaped partition 20, the latter being formed of non-magnetic material, such as a suitable metal.
  • annular driving magnet 24 carried by an annular bracket 25 fixed to the shaft 26 of motor 10.
  • the interior of cup-shaped partition 20 defines a driven magnet chamber 27 within which an annular driven magnet 28 is located coaxial with driving magnet 24.
  • Magnets 24 and 28 are spaced as closely as possible to their respective sides of the annular wall of partition 20, so that the radial spacing between them is a minimum, and hence the radial force of attraction between them is a maximum.
  • Driven magnet 28 is fixed to the lower end of a shaft 31 by means of a pair of brackets 32.
  • a pump impeller 33 is fixed to the upper end of shaft 31.
  • the central portion of shaft 31 is accommodated within bearings 34 held within a hub 35 of plate 18.
  • Axial movement of shaft 31 is prevented by collars 36 fixed to it and slidably engaging the ends of bearings 34.
  • Impeller 33 rotates within an impeller chamber 39 formed in pump body 12, the lower wall 40 of chamber 39 having a central opening defining the pump inlet 41.
  • Inlet 41 communicates with an inlet connection tube 42 adapted to be connected to a conduit through which liquid to be filtered flows to the pump.
  • the top wall of impeller chamber 39 is defined by the bottom wall 43 of filter housing 13, holes 44 in wall 43 forming the pump outlet.
  • a rod 47 extends axially through filter housing 13, its lower end being threaded into bottom wall 43 and its upper end threadably accommodating a knob 48. The latter tightly presses a cover 49 on to the upper end of housing 13, a seal 50 providing a liquid-tight connection between the two.
  • Surrounding rod 47 is a filter tube 51, the lower end of the filter tube being seated upon an annular ridge 52 projecting upwardly from bottom wall 43, and the upper end seating against an annular ridge 53 projecting downwardly from cover 49.
  • Filter tube 51 is radially spaced from rod 47 and housing 13 to define, respectively, an inner filter chamber 54 and an outer filter chamber 55. At its upper end, inner filter chamber 54 communicates with a discharge connection tube 56 adapted to be connected to a conduit through which filtered liquid flows from the unit.
  • Holes 44 in bottom wall 43 of filter housing 13 communicate with outer filter chamber 55.
  • liquid to be filtered flows in the direction of the arrows through tube 42 into inlet 41, and through holes 44 into outer filter chamber 55.
  • the liquid is then forced radially through filter tube 51, so that only filtered liquid reaches inner filter chamber 54, from which it flows out through tube 56.
  • the pump and filter unit thus far described has the advantage of compactness and efficiency since motor 10, magnetic coupling 24, 28, pump body 12, and filter housing 13 are all axially aligned.
  • motor 10, magnetic coupling 24, 28, pump body 12, and filter housing 13 are all axially aligned.
  • a problem is presented due to the tendency of solid particles in the liquid flowing through inlet connection tube 42 and inlet 41 to drop into driven magnet chamber 27 and become lodged between driven magnet 28 and the surrounding wall of partition 20.
  • the present invention avoids this in the following way.
  • Bottom wall 43 of filter housing 13 is formed with an internal bore 60 which communicates at its inner end with inner filter chamber 54 and terminates at its outer end in a connection tube 61.
  • Pump body 12 presents a connection tube 62 communicating at its inner end with an auxiliary chamber 63 within the pump body.
  • the bottom wall of chamber 63 is defined by plate 18, chamber 63 communicating with driven magnet chamber 27 through holes 64 in plate 18.
  • Chamber 63 has an annular top wall 65 furnished with a central hole slightly larger than the diameter of hub 35 of plate 18 so as to define an annular restricted flow passage 66 between wall 65 and hub 35.
  • a length of tubing 67 interconnects connection tubes 61 and 62.
  • means for rotating said impeller including a driven magnet-rotatable with said impeller and a driving magnet magnetically coupled to said driven magnet; e. a partition separating said magnets and defining a chamber within which said driven magnet rotates; f. an auxiliary chamber between said driven magnet chamber and said inlet; means for introducing into said auxiliary chamber filtered liquid from said filter means;
  • passageway means establishing communication between said auxiliary chamber and said inlet, filtered liquid flowing through said passageway means from said auxiliary chamber to said inlet in a direction away from said driven magnet chamber, so as to prevent unfiltered liquid flowing to said inlet from flowing through said passageway means to said driven magnet chamber.
  • a pump and filter unit as defined in claim 1 wherein said means (d) for rotating said impeller includes a motor having a shaft, said driving magnet being rotatable with said motor shaft, and wherein said filter means includes a filter housing accommodating a filter element, said motor, pump body, and filter housing all being axially aligned.
  • I t 0 101. 4

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00115265A 1971-02-16 1971-02-16 Pump and filter unit Expired - Lifetime US3736075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11526571A 1971-02-16 1971-02-16

Publications (1)

Publication Number Publication Date
US3736075A true US3736075A (en) 1973-05-29

Family

ID=22360260

Family Applications (1)

Application Number Title Priority Date Filing Date
US00115265A Expired - Lifetime US3736075A (en) 1971-02-16 1971-02-16 Pump and filter unit

Country Status (7)

Country Link
US (1) US3736075A (enExample)
CH (1) CH536436A (enExample)
DE (1) DE2205959A1 (enExample)
FR (1) FR2125952A5 (enExample)
GB (1) GB1325131A (enExample)
IT (1) IT947586B (enExample)
NL (1) NL7202001A (enExample)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850550A (en) * 1971-08-05 1974-11-26 Hydr O Matic Pump Co Centrifugal pump and motor
US3932064A (en) * 1972-02-23 1976-01-13 The Secretary Of State For Defense In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Rotary bladed fluid flow machine
US3986797A (en) * 1974-05-20 1976-10-19 David Kopf Systems Magnetic pump
FR2358559A1 (fr) * 1976-07-15 1978-02-10 Rau Swf Autozubehoer Bloc d'alimentation en carburant
FR2547366A1 (fr) * 1983-06-10 1984-12-14 Aquaria Inc Filtre independant pour aquariums
US5030346A (en) * 1988-01-15 1991-07-09 Henry Filters, Inc. Pump for filtration system
US5165868A (en) * 1991-04-29 1992-11-24 Tuthill Corporation Magnetically driven pump
US5178523A (en) * 1989-09-11 1993-01-12 Team Worldwide Corporation Auxiliary package for a bath-pool
US5263829A (en) * 1992-08-28 1993-11-23 Tuthill Corporation Magnetic drive mechanism for a pump having a flushing and cooling arrangement
US5417553A (en) * 1993-06-02 1995-05-23 Gibson; Roger L. Submersible pump support
US5494416A (en) * 1993-11-12 1996-02-27 Tuthill Corporation Magnetically driven positive displacement pump and thrust bearing assembly
US5972210A (en) * 1995-03-29 1999-10-26 Argo Gmbh Fuer Fluidtechnik Bypass-mounted filter assembly
US6270324B1 (en) 1999-10-26 2001-08-07 Tuthill Corp. Positive displacement pump and thrust bearing assembly
US6629814B2 (en) 2000-08-22 2003-10-07 Henry Filters, Inc. Low profile pump
US20040173517A1 (en) * 2003-03-03 2004-09-09 Yuan Kuang Cheung Water filter and pump
US20070289544A1 (en) * 2006-06-15 2007-12-20 Chi-Cheng Mao Generator of circulative currents for an aquarium system
US20080190870A1 (en) * 2007-02-14 2008-08-14 Levitronix, Llc Filter and pump unit, filter and pump apparatus having such a unit and also method for filtering out
US20080197068A1 (en) * 2007-02-16 2008-08-21 Ming-Jung Wu Filtration device of water pump
US20120152866A1 (en) * 2010-12-21 2012-06-21 Stiles Jr Robert W Modular Pump and Filter System and Method
ITPD20120088A1 (it) * 2012-03-23 2013-09-24 Acqua Brevetti 95 S R L Raccordo per il collegamento di una pompa dosatrice ad un impianto idraulico
CN116733755A (zh) * 2023-08-11 2023-09-12 山西五建集团有限公司 一种高效过滤循环水泵

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3015211C2 (de) * 1980-04-19 1986-05-28 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Schutzeinrichtung für Unterwassermotoren
FR2509804A1 (fr) * 1981-07-17 1983-01-21 Sofretes Mengin Installation de pompage de l'eau au fond d'un puits utilisant l'energie solaire
GB2263312A (en) * 1992-01-17 1993-07-21 Stork Pompen Vertical pump with magnetic coupling.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225338A (en) * 1937-05-13 1940-12-17 Gen Electric Immersion pump arrangement
US2871791A (en) * 1959-02-03 litzenberg
US2963980A (en) * 1957-05-03 1960-12-13 Fostoria Corp Fluid take off connections for motor driven pumps and the like
US3172850A (en) * 1960-12-12 1965-03-09 Integral immersible filter and pump assembly
US3249777A (en) * 1963-12-19 1966-05-03 Bergstrom Mfg Company Magnetic drive or coupling
US3411450A (en) * 1967-03-07 1968-11-19 Little Giant Corp Pump
US3415195A (en) * 1967-06-05 1968-12-10 Walbro Corp Magnetic drive pump
US3450052A (en) * 1966-06-07 1969-06-17 Plessey Co Ltd Lubrication of rotary pumps intended for the delivery of liquid containing solid contaminants
US3520642A (en) * 1968-10-29 1970-07-14 Process Ind Inc Motor driven pump

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871791A (en) * 1959-02-03 litzenberg
US2225338A (en) * 1937-05-13 1940-12-17 Gen Electric Immersion pump arrangement
US2963980A (en) * 1957-05-03 1960-12-13 Fostoria Corp Fluid take off connections for motor driven pumps and the like
US3172850A (en) * 1960-12-12 1965-03-09 Integral immersible filter and pump assembly
US3249777A (en) * 1963-12-19 1966-05-03 Bergstrom Mfg Company Magnetic drive or coupling
US3450052A (en) * 1966-06-07 1969-06-17 Plessey Co Ltd Lubrication of rotary pumps intended for the delivery of liquid containing solid contaminants
US3411450A (en) * 1967-03-07 1968-11-19 Little Giant Corp Pump
US3415195A (en) * 1967-06-05 1968-12-10 Walbro Corp Magnetic drive pump
US3520642A (en) * 1968-10-29 1970-07-14 Process Ind Inc Motor driven pump

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850550A (en) * 1971-08-05 1974-11-26 Hydr O Matic Pump Co Centrifugal pump and motor
US3932064A (en) * 1972-02-23 1976-01-13 The Secretary Of State For Defense In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Rotary bladed fluid flow machine
US3986797A (en) * 1974-05-20 1976-10-19 David Kopf Systems Magnetic pump
FR2358559A1 (fr) * 1976-07-15 1978-02-10 Rau Swf Autozubehoer Bloc d'alimentation en carburant
US4143488A (en) * 1976-07-15 1979-03-13 Itt Industries, Inc. Fuel supply unit
FR2547366A1 (fr) * 1983-06-10 1984-12-14 Aquaria Inc Filtre independant pour aquariums
US5030346A (en) * 1988-01-15 1991-07-09 Henry Filters, Inc. Pump for filtration system
US5178523A (en) * 1989-09-11 1993-01-12 Team Worldwide Corporation Auxiliary package for a bath-pool
US5165868A (en) * 1991-04-29 1992-11-24 Tuthill Corporation Magnetically driven pump
US5263829A (en) * 1992-08-28 1993-11-23 Tuthill Corporation Magnetic drive mechanism for a pump having a flushing and cooling arrangement
US5417553A (en) * 1993-06-02 1995-05-23 Gibson; Roger L. Submersible pump support
US5494416A (en) * 1993-11-12 1996-02-27 Tuthill Corporation Magnetically driven positive displacement pump and thrust bearing assembly
US5972210A (en) * 1995-03-29 1999-10-26 Argo Gmbh Fuer Fluidtechnik Bypass-mounted filter assembly
US6270324B1 (en) 1999-10-26 2001-08-07 Tuthill Corp. Positive displacement pump and thrust bearing assembly
US6629814B2 (en) 2000-08-22 2003-10-07 Henry Filters, Inc. Low profile pump
US20030194314A1 (en) * 2000-08-22 2003-10-16 Mcewen Stephen N. Low profile pump
US20040173517A1 (en) * 2003-03-03 2004-09-09 Yuan Kuang Cheung Water filter and pump
US6991721B2 (en) * 2003-03-03 2006-01-31 Aqua-Leisure Industries, Inc Water filter and pump
US20070289544A1 (en) * 2006-06-15 2007-12-20 Chi-Cheng Mao Generator of circulative currents for an aquarium system
US20080190870A1 (en) * 2007-02-14 2008-08-14 Levitronix, Llc Filter and pump unit, filter and pump apparatus having such a unit and also method for filtering out
US8349172B2 (en) * 2007-02-14 2013-01-08 Levitronix Technologies, LLC Filter and pump unit, filter and pump apparatus having such a unit and also method for filtering out
US7544297B2 (en) * 2007-02-16 2009-06-09 Ming-Jung Wu Filtration device of water pump
US20080197068A1 (en) * 2007-02-16 2008-08-21 Ming-Jung Wu Filtration device of water pump
US20120152866A1 (en) * 2010-12-21 2012-06-21 Stiles Jr Robert W Modular Pump and Filter System and Method
US9555352B2 (en) * 2010-12-21 2017-01-31 Pentair Water Pool And Spa, Inc. Modular pump and filter system and method
ITPD20120088A1 (it) * 2012-03-23 2013-09-24 Acqua Brevetti 95 S R L Raccordo per il collegamento di una pompa dosatrice ad un impianto idraulico
CN116733755A (zh) * 2023-08-11 2023-09-12 山西五建集团有限公司 一种高效过滤循环水泵
CN116733755B (zh) * 2023-08-11 2023-10-27 山西五建集团有限公司 一种高效过滤循环水泵

Also Published As

Publication number Publication date
GB1325131A (en) 1973-08-01
IT947586B (it) 1973-05-30
FR2125952A5 (enExample) 1972-09-29
DE2205959A1 (de) 1972-08-17
NL7202001A (enExample) 1972-08-18
CH536436A (de) 1973-04-30

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