US2810556A - Agitators for fluid cooling tanks and the like - Google Patents

Agitators for fluid cooling tanks and the like Download PDF

Info

Publication number
US2810556A
US2810556A US493996A US49399655A US2810556A US 2810556 A US2810556 A US 2810556A US 493996 A US493996 A US 493996A US 49399655 A US49399655 A US 49399655A US 2810556 A US2810556 A US 2810556A
Authority
US
United States
Prior art keywords
rotor
tank
cylinder
agitators
fluid
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
US493996A
Inventor
Igor V Zozulin
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.)
Tormag Transmissions Ltd
Original Assignee
Tormag Transmissions Ltd
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 Tormag Transmissions Ltd filed Critical Tormag Transmissions Ltd
Priority to US493996A priority Critical patent/US2810556A/en
Application granted granted Critical
Publication of US2810556A publication Critical patent/US2810556A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
    • B01F33/4534—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements using a rod for supporting the stirring element, e.g. stirrer sliding on a rod or mounted on a rod sliding in a tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements
    • B01F33/4535—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements using a stud for supporting the stirring element

Definitions

  • the object of the present invention is to provide an agitator for immersion in fluid in a tank, whereby the impeller element of the device is not in any way connected mechanically with any other part of the device when said device is in operation, and whereby it becomes possible for the impeller element to be a simple doughnut shaped structure having no internal projections or crevices capable of presenting any cleaning problem.
  • a further object is to provide an agitator structure where the impeller element is disposed to rotate above the bottom wall of a tank and have its path of rotation about a perfectly smooth cylinder projecting upwardly above said bottom wall.
  • Figure l is a vertical sectional view of the invention having an impeller element adapted for rotation adjacent the bottom wall of the tank.
  • Figure 1A is a sectional view taken on the line 1A1A of Figure l and showing the radial disposition of the magnets.
  • Figure 1B is an elevation of the inner end face of a magnet.
  • Figure 2 is a vertical sectional view of a modification having an impeller element to rotate at the level of the fluid in the tank.
  • Figure 3 is a vertical sectional view of a further modification having no moving part other than the impeller element.
  • the numeral 1 indicates the bottom wall of a tank having a central opening 2 which is lined with a sleeve 3.
  • the sleeve 3 supports a thin cylinder or diaphragm 4 which is substantially non-magnetic, being preferably of stainless steel, and extends upwardly into the tank and is provided with a top closure 5.
  • a motor 7 having a drive shaft 8 which extends close to the top closure of the cylinder 4 and is fitted with a fan 9 having a peripheral rim 11.
  • a cylindrical rotor 12 which may be of any suitable electrically conductive material such as copper or aluminum, is mounted upon the rim 11 of the fan 9 and is spaced an appropriate distance within the cylinder or diaphragm 4 to provide a. suitable air gap 13 therebetween.
  • a light stationary sleeve 14 Surrounding the body of the motor 7 is a light stationary sleeve 14 which defines an upcast and a downcast air space 16 and 17.
  • the air space 16 connects concentrically with the air gap 13, thus providing suitable air circulation from below the motor, upwardly around the upper part of said motor, through the fan 9 and down through the downcast air space 17 to the atmosphere below the tank.
  • This air circulation also serves to cool the rotor 12 and the motor 7.
  • a doughnut shaped member 18 defining an annular chamber 19 is adapted to be placed within the tank and function coaxially with the cylinder 4.
  • This member 18 is provided with vanes 20, the lower portions 21 of which ice are inclined upwardly in the direction of the rotation of the motor shaft 8 in order to assist the member to ride in suspension in the fluid in the tank when rotating.
  • One or more annular rows of magnets 25 are carried within the chamber with their pole pieces disposed in opposition to the rotor 12 and in such close proximity to the exterior of the cylinder 4 as to provide a suitable air gap between said cylinder and the pole pieces when the member 18 is rotating or afloat in the fluid in which it is intended to work, so that when the motor shaft is rotating at suitable speed eddy currents induced in the rotor 12 by the field of the magnets 25 will transmit the torque of the motor through the magnetic rotor 12 to the magnets and the member 18.
  • the lifting action of the vanes will cause the member 18 to rise until the top row of magnets will start to climb above the top edge of the rotor 12. This action will obviously reduce the torque transmitted, resulting in a drop of speed of said member.
  • the upstanding closed topped cylinder carried on the tank bottom wall is indicated by the numeral and extends to a substantial height within the tank, the conductive rotor 42 is journalled at the top of the cylinder as at 43.
  • the specific gravity of the impeller member 45 may be slightly less than that of the fluid to be stirred, so that it may rotate and float at the fluid level in the tank.
  • the inner periphery of the impeller member is fitted with rows of permanent magnets 46 whose pole pieces are opposed when in operation to the conductive rotor 42 as in the previously described modification.
  • the closed topped cylinder is indicated by the numeral 50 and is secured on the bottom wall of the tank as above described to form a cylindrical diaphragm.
  • annular stator is mounted which is provided with appropriate pole pieces and windings, which latter are adapted for connection within a suitable electric circuit.
  • the impeller element 57 is an annular member of slightly greater specific gravity than the fluid in which it is run, its impellers are relied upon to give the added lift to keep it suspended in the fluid in the tank when rotating and is provided internally with an electro conductive rotor 58 in opposition to the pole pieces of the stator.
  • a magnetically driven agitator comprising a substantially non-magnetic stationary cylinder mounted on the bottom wall of a liquid containing tank, a cylindrical rotor of non-magnetic material of high electrical conductivity journalled vertically within the stationary cylinder, means for rotating the cylindrical rotor, a magnetic rotor in the form of an annulus adapted for rotation about the Stationary cylinder, said magnetic rotor having an annulus-of magnets with their poles extending radially 'inwardswhereby when surrounding the stationary cylinder to define an air gap therebetween, said magnetic rotor having a spiral impeller, said stationary cylinder being substantially longer than the height of the magnetic rotor, and means as the magnetic rotor is rotated by eddy currents generated incidental to rotation of the cylindrical rotor in a given direction to propel the magnetic rotor upwardly of the stationary cylinder in fluid contained within the tank.

Description

I. V. ZOZULIN Oct. 22, 1957 AGITATORS FOR FLUID COOLING TANKS AND THE LIKE Filed March 14, 1955 2 Sheets-Sheet 1 VEN 76R IGOR ZOZUL/N f mfi A 7' TOR NE Y I. V. ZOZU LIN Oct. 22, 1957 AGITATORS FOR FLUID COOLING TANKS AND THE LIKE Filed March 14, 1955 2 Sheets-Sheet 2 INVENTOR I IGOR I v; zozuu/v fey 14..
ATTORIYEY AGITATORS FOR FLUID COOLING TANKS AND THE LIKE igoFV. Zozulin, Vancouver, British Columbia, Canada, assignor tmTormag Transmissions Limited, Vancouver, British Columbia, Canada Application March 14, 1955, Serial No. 493,996
2 Claims. (Cl. 259-108) My invention relates to improvements in agitators for fluid cooling tanks and the like.
The object of the present invention is to provide an agitator for immersion in fluid in a tank, whereby the impeller element of the device is not in any way connected mechanically with any other part of the device when said device is in operation, and whereby it becomes possible for the impeller element to be a simple doughnut shaped structure having no internal projections or crevices capable of presenting any cleaning problem. A further object is to provide an agitator structure where the impeller element is disposed to rotate above the bottom wall of a tank and have its path of rotation about a perfectly smooth cylinder projecting upwardly above said bottom wall.
Referring to the accompanying drawings:
Figure l is a vertical sectional view of the invention having an impeller element adapted for rotation adjacent the bottom wall of the tank. Figure 1A is a sectional view taken on the line 1A1A of Figure l and showing the radial disposition of the magnets. Figure 1B is an elevation of the inner end face of a magnet.
Figure 2 is a vertical sectional view of a modification having an impeller element to rotate at the level of the fluid in the tank.
Figure 3 is a vertical sectional view of a further modification having no moving part other than the impeller element.
In the drawings like characters of reference indicate corresponding parts in each figure.
The numeral 1 indicates the bottom wall of a tank having a central opening 2 which is lined with a sleeve 3. The sleeve 3 supports a thin cylinder or diaphragm 4 which is substantially non-magnetic, being preferably of stainless steel, and extends upwardly into the tank and is provided with a top closure 5.
Mounted within the central bottom opening 2 is a motor 7 having a drive shaft 8 which extends close to the top closure of the cylinder 4 and is fitted with a fan 9 having a peripheral rim 11. A cylindrical rotor 12, which may be of any suitable electrically conductive material such as copper or aluminum, is mounted upon the rim 11 of the fan 9 and is spaced an appropriate distance within the cylinder or diaphragm 4 to provide a. suitable air gap 13 therebetween. Surrounding the body of the motor 7 is a light stationary sleeve 14 which defines an upcast and a downcast air space 16 and 17. The air space 16 connects concentrically with the air gap 13, thus providing suitable air circulation from below the motor, upwardly around the upper part of said motor, through the fan 9 and down through the downcast air space 17 to the atmosphere below the tank. This air circulation also serves to cool the rotor 12 and the motor 7.
A doughnut shaped member 18 defining an annular chamber 19 is adapted to be placed within the tank and function coaxially with the cylinder 4. This member 18 is provided with vanes 20, the lower portions 21 of which ice are inclined upwardly in the direction of the rotation of the motor shaft 8 in order to assist the member to ride in suspension in the fluid in the tank when rotating. One or more annular rows of magnets 25 are carried within the chamber with their pole pieces disposed in opposition to the rotor 12 and in such close proximity to the exterior of the cylinder 4 as to provide a suitable air gap between said cylinder and the pole pieces when the member 18 is rotating or afloat in the fluid in which it is intended to work, so that when the motor shaft is rotating at suitable speed eddy currents induced in the rotor 12 by the field of the magnets 25 will transmit the torque of the motor through the magnetic rotor 12 to the magnets and the member 18. The lifting action of the vanes will cause the member 18 to rise until the top row of magnets will start to climb above the top edge of the rotor 12. This action will obviously reduce the torque transmitted, resulting in a drop of speed of said member. This reduces the lifting action of the vanes and prevents the member from lifting further. When the motor is stopped, the upward lift of the impeller upon the member 18 will be lost and it will sink until a button 27 on a bridge piece 28 extending across the member 18 comes to rest on the top closure 5 of the cylinder 4. The member is centered axially by radial repulsion which exists between the magnets 25 and eddy currents induced in the conductive cylindrical rotor 12 at the rate of slip envisaged.
In the modification shown in Figure 2, the upstanding closed topped cylinder carried on the tank bottom wall is indicated by the numeral and extends to a substantial height within the tank, the conductive rotor 42 is journalled at the top of the cylinder as at 43. The specific gravity of the impeller member 45 may be slightly less than that of the fluid to be stirred, so that it may rotate and float at the fluid level in the tank. The inner periphery of the impeller member is fitted with rows of permanent magnets 46 whose pole pieces are opposed when in operation to the conductive rotor 42 as in the previously described modification.
In the modification shown in Figure 3, the closed topped cylinder is indicated by the numeral 50 and is secured on the bottom wall of the tank as above described to form a cylindrical diaphragm. Within the cylinder 50 an annular stator is mounted which is provided with appropriate pole pieces and windings, which latter are adapted for connection within a suitable electric circuit. The impeller element 57 is an annular member of slightly greater specific gravity than the fluid in which it is run, its impellers are relied upon to give the added lift to keep it suspended in the fluid in the tank when rotating and is provided internally with an electro conductive rotor 58 in opposition to the pole pieces of the stator.
It will be clearly seen that the three modifications herein described are fundamentally identical, each having a magnetic rotor and a conductive rotor relatively movable by means of eddy currents from a magnetic field, one of the moving parts enumerated being a buoyant structure or capable of being rendered buoyant by the impellers adapted for immersion in the fluid in the tank.
In the modifications shown in Figures 1 and 2, the magnets of the rotor lag behind the conductive rotor which is mechanically rotated, whereas in the modification of Figure 3 the electro conductive rotor lags the rotating magnetic field produced by electrical current in the stator 55.
What I claim as my invention is:
1. A magnetically driven agitator comprising a substantially non-magnetic stationary cylinder mounted on the bottom wall of a liquid containing tank, a cylindrical rotor of non-magnetic material of high electrical conductivity journalled vertically within the stationary cylinder, means for rotating the cylindrical rotor, a magnetic rotor in the form of an annulus adapted for rotation about the Stationary cylinder, said magnetic rotor having an annulus-of magnets with their poles extending radially 'inwardswhereby when surrounding the stationary cylinder to define an air gap therebetween, said magnetic rotor having a spiral impeller, said stationary cylinder being substantially longer than the height of the magnetic rotor, and means as the magnetic rotor is rotated by eddy currents generated incidental to rotation of the cylindrical rotor in a given direction to propel the magnetic rotor upwardly of the stationary cylinder in fluid contained within the tank.
2. A magnetically driven agitator as claimed in claim 1,
wherein said air gap between the annulus of the magnetic rotor and the stationary cylinder will enable a repulsive component to develop in the magnetic field between the magnetic rotor and the cylindrical rotor and hold said magnetic rotor concentric with the stationary cylinder and out of contact therewith.
References Cited in the file of this patent UNITED STATES PATENTS 1,420,773 Stainbrook June 27, 1922 1,724,594 Huntington Aug. 13, 1929 1,869,590 Voss Aug. 2, 1932 2,495,895 Hervert Jan. 31, 1950 2,556,854 Spears et a1. June 12, 1951 2,711,306 Levi June 21, 1955
US493996A 1955-03-14 1955-03-14 Agitators for fluid cooling tanks and the like Expired - Lifetime US2810556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US493996A US2810556A (en) 1955-03-14 1955-03-14 Agitators for fluid cooling tanks and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US493996A US2810556A (en) 1955-03-14 1955-03-14 Agitators for fluid cooling tanks and the like

Publications (1)

Publication Number Publication Date
US2810556A true US2810556A (en) 1957-10-22

Family

ID=23962578

Family Applications (1)

Application Number Title Priority Date Filing Date
US493996A Expired - Lifetime US2810556A (en) 1955-03-14 1955-03-14 Agitators for fluid cooling tanks and the like

Country Status (1)

Country Link
US (1) US2810556A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360767A1 (en) * 1988-09-23 1990-03-28 CO.RA di LARDIERI SALVATORE Magnetic drive stirring unit
EP0399971A1 (en) * 1989-05-26 1990-11-28 Steridose Systems Ab Drive device for an impeller for sterile applications
US5478149A (en) * 1995-04-24 1995-12-26 Magnetic Mixers, Inc. Magnetic mixer
US6065865A (en) * 1998-06-05 2000-05-23 Mixel Magnetically driven agitator with magnetic rotation detector
US6416215B1 (en) * 1999-12-14 2002-07-09 University Of Kentucky Research Foundation Pumping or mixing system using a levitating magnetic element
US6758593B1 (en) 2000-10-09 2004-07-06 Levtech, Inc. Pumping or mixing system using a levitating magnetic element, related system components, and related methods
US20080013400A1 (en) * 2006-07-14 2008-01-17 Sigma-Aldrich Co. Magnetic Stirrer
EP3659700A1 (en) * 2018-11-29 2020-06-03 Alfa Laval Corporate AB Magnetically-coupled liquid mixer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1420773A (en) * 1921-12-22 1922-06-27 Magnetic Drink Mixer Company Electrical drink mixer
US1724594A (en) * 1925-07-22 1929-08-13 Fairbanks Morse & Co Washing machine
US1869590A (en) * 1930-03-24 1932-08-02 Walter K Voss Agitator
US2495895A (en) * 1945-10-31 1950-01-31 Universal Oil Prod Co Fluid circulating device
US2556854A (en) * 1949-10-29 1951-06-12 Standard Oil Dev Co Magnetic coupling drive for highpressure stirred reactors
US2711306A (en) * 1953-11-23 1955-06-21 Levi Leone Magnetic stirrer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1420773A (en) * 1921-12-22 1922-06-27 Magnetic Drink Mixer Company Electrical drink mixer
US1724594A (en) * 1925-07-22 1929-08-13 Fairbanks Morse & Co Washing machine
US1869590A (en) * 1930-03-24 1932-08-02 Walter K Voss Agitator
US2495895A (en) * 1945-10-31 1950-01-31 Universal Oil Prod Co Fluid circulating device
US2556854A (en) * 1949-10-29 1951-06-12 Standard Oil Dev Co Magnetic coupling drive for highpressure stirred reactors
US2711306A (en) * 1953-11-23 1955-06-21 Levi Leone Magnetic stirrer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360767A1 (en) * 1988-09-23 1990-03-28 CO.RA di LARDIERI SALVATORE Magnetic drive stirring unit
EP0399971A1 (en) * 1989-05-26 1990-11-28 Steridose Systems Ab Drive device for an impeller for sterile applications
US5478149A (en) * 1995-04-24 1995-12-26 Magnetic Mixers, Inc. Magnetic mixer
US6065865A (en) * 1998-06-05 2000-05-23 Mixel Magnetically driven agitator with magnetic rotation detector
US6416215B1 (en) * 1999-12-14 2002-07-09 University Of Kentucky Research Foundation Pumping or mixing system using a levitating magnetic element
US6758593B1 (en) 2000-10-09 2004-07-06 Levtech, Inc. Pumping or mixing system using a levitating magnetic element, related system components, and related methods
US6899454B2 (en) * 2000-10-09 2005-05-31 Levtech, Inc. Set-up kit for a pumping or mixing system using a levitating magnetic element
US20080013400A1 (en) * 2006-07-14 2008-01-17 Sigma-Aldrich Co. Magnetic Stirrer
US7520657B2 (en) * 2006-07-14 2009-04-21 Sigma-Aldrich Co. Magnetic stirrer
EP3659700A1 (en) * 2018-11-29 2020-06-03 Alfa Laval Corporate AB Magnetically-coupled liquid mixer
WO2020109167A1 (en) * 2018-11-29 2020-06-04 Alfa Laval Corporate Ab Magnetically-coupled liquid mixer
CN113056325A (en) * 2018-11-29 2021-06-29 阿法拉伐股份有限公司 Magnetically coupled liquid mixer

Similar Documents

Publication Publication Date Title
US4247265A (en) Centrifugal pump for small throughputs, particularly for water circulation in aquariums and the like
US5353613A (en) Electric motor for clothes washing machine drive
US2810556A (en) Agitators for fluid cooling tanks and the like
US3750951A (en) Heat system for dishwasher
US4226574A (en) Magnetically driven pump
JPH07789A (en) Impeller for stirring aseptic solution
US5266855A (en) Electric motor for clothes washing machine drive
US8814422B2 (en) Eddy current motor, eddy current coupling system, and method of use
GB1412571A (en) Electric motor driven submersible pump
BR102012009804A2 (en) fluid handling device
KR100242321B1 (en) Dc motor
US2990256A (en) Crystal growing apparatus
US11511209B2 (en) Paddling method for craft
JPH0571492A (en) Hybrid pump
KR100968384B1 (en) Underwater motor pump
US3649557A (en) Centrifugal mechanical defoamer
US3164734A (en) Synchronous motor with notched pole pieces to facilitate starting
CN104814684A (en) Food stirrer
CN210068509U (en) Fan installed and driven by magnetic force
US2633339A (en) Immersion type agitator and the like
US2278624A (en) Motor-driven mechanism
US2268454A (en) Washing machine
CN209089717U (en) A kind of novel tonifying Qi stirring wheel
JPS6034727A (en) Electromagnetic induction agitator
CN109106192A (en) Automatic lifting electric caldron