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US3279388A - Semi-rotary magnetic device - Google Patents

Semi-rotary magnetic device Download PDF

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Publication number
US3279388A
US3279388A US399143A US39914364A US3279388A US 3279388 A US3279388 A US 3279388A US 399143 A US399143 A US 399143A US 39914364 A US39914364 A US 39914364A US 3279388 A US3279388 A US 3279388A
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Prior art keywords
rings
diaphragm
magnets
magnetic
shaft
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Expired - Lifetime
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US399143A
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Philippe R L Roudaut
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/082—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism

Definitions

  • Th-is invention relates to a semi-rotary magnetic device for driving rotary machines, more particularly tubular diaphragm pumps.
  • Submersed-rotor pumps are also used which are magnetically coupled or integral with a submersed-rotor motor, generally of the centrifugal type, in order to climinate the disadvantages of glands or packings.
  • the present device ena-bles the -advantages of the two systems Ito be combined without their disadvantages.
  • the present invention is 'applied preferably to tubular diaphragm pumps, i.e., pumps ofan elongated shape comprising one or more cavities communicating lat one of their ends with an inlet aperture and Iat the other end with an outlet aperture for the fluid that is to be pumped, such cav-ities lbeing formed by -a exi'ble tubular diaphragm contained in a tubular body.
  • tubular diaphragm pumps i.e., pumps ofan elongated shape comprising one or more cavities communicating lat one of their ends with an inlet aperture and Iat the other end with an outlet aperture for the fluid that is to be pumped, such cav-ities lbeing formed by -a exi'ble tubular diaphragm contained in a tubular body.
  • rI'lie invention relates more particularly to 1a magnetic device for producing periodic deformation of the diaphragm to effect the required displacement of the cavities from one end of the pump to the other.
  • the diaphragm is of flexible material and comprises preferably the narrowest possible rings lof magnetic material distributed over its length, means being provided to subject such rings to magnetic flux, whose passage provides displacement of such rings and hence lthe required deformation of the diaphragm.
  • These means may be permanent magnets or other magnets which rotate in relation to the annular space containing the diaphragm. These magnets, which act on the rings, are so disposed Ithat radial movements occur with offsetting on said rings, the rotated force is absorbed by the semi-ilexible partitions generally provided in such machines or by contact in the case of constructions without partitions, thus preventing :any continu-ous friction by rotation yof the parts n the pump liquid.
  • This system also eliminates the disadvantage of volumetric pumps for which it is also intended, namely, the need for a relief pressure valve in the event of accidental blockage of the delivery; in fact, at the magnet zone the diaphragm may be considered ⁇ as urged by .a sp-ring whose calibration is simply the magnetic attraction.
  • This pressure can be varied voluntraily by moving the magnets away from the attracted elements by some means in order to sh1ortcircuit rthe lines of force of the eld. For the practical embodiment, the number of magnets used will depend von the required pressure.
  • the delivery of lthe machine can also be controlled during operation, Without lany variation of the speed of rotation, by this magnetic system.
  • the delivery and pressure may be combined ⁇ to give a required characteristic curve.
  • the device according to the present invention enables the direction of flow in pumps equipped with such a device to be made relatively independent of the direction of rotation of the driving motor.
  • the direction of flow of the fluid depends on the ydirection in which the helix formed by the magnet support or by the magnets themselves is wound; thus if this element is cancelled out for example by a movement of translation (which is preferable in this case) and then replaced by another element with an opposite pitch, the direction of ow is reversed without the direction of rotation of the motor having change.
  • a given direction of flow for the fluid can therefore be maintained irrespective of the direction of rotation of the motor and in fact without the latter direction even being known.
  • This system may also be retained for a pump which is required to be reversible in operation as in certain laboratory work.
  • Control in this case may be manual or controlled by the installation itself and the delivery can pass through zero before reversal; for example, in accordance with the variation principle indicated above, in the case of magnets in operation while others must come into operation in inverse proportion, either directly or via their supports.
  • the volume available for installation of the magnets is utilised to the maximum by making the magnets in the form of split rings mounted coaxially of the rotary shaft and uniformly offset from one another about the axis of the shaft so as to produce the required helical magnetic field.
  • installation is obtained by means of non-magnetic supports concentric of the magnets and fitting between the ends of the latter.
  • Means are preferably provided to vary the pitch of the helical field, so as to reduce the starting torque or control delivery during operation.
  • FIGURE l is a diagrammatic longitudinal section of a device according to the invention.
  • FIGURE 2 is also a diagrammatic longitudinal section of a modification
  • FIGURE 3 is an axial half-section of another modification
  • FIGURE 4 is a cross-section on the line IV-IV in FIGURE 3.
  • the device cornprises a tubular element 1 of cylindrical shape and of a material permeable to magnetic flux and fitted at its ends to the base of the pump equipped with the system, sealing being provided directly by the diaphragm M- of the pump in question.
  • U-section rings 2 are clamped or stuck inside the.
  • These rings are of a material sensitive to the magnetic flux, for example soft iron.
  • the shaft 3 forms the magnetic assembly support and is provided with a bushing 4 to support a magnet S to which are connected two pole elements 6 and 7 for north and south respectively, which are helieally coiled on a helical element 8 which is impermeable to the magnetic flux and which keeps the pole elements 6 and 7 rigidly spaced.
  • the end of these elements is fitted to the face of a semi-flexible cup 9 which acts as a hydraulic piston slidable on the shaft 3 and rotatable to a certain extent.
  • the rings 2 are attracted helically along the helix formed by the elements 6, 7 and 8 through the tube 1 so that the diaphragm looks like a coarse pitch screw.
  • the delivery of the pump provided with such a system can also be varied during operation. That surface of the piston 9 which is remote from the pole elements is subjected to the pressure of a servo liquid which can move it along the shaft axis as far as the magnet support 4, thus reducing the pitch of the pole elements and their support 6, 7 ⁇ and S and hence the volume of the cavities and therefore the rate of delivery of the pump without any variation in the speed of rotation.
  • FIG. 2 illustrates an embodiment of a iiow varying and reversing system.
  • the rings 2 are rigidly connected, for example are stuck, to the flexible pump diaphragm M and while they again have a U-section, the arms of the U face outwards.
  • the hollow shaft 3 is used as a support for the magnetic system, which is similar to that described hereinbefore but which acts towards the axis of rotation through the tube 1.
  • This system is substantially duplicated however, the second part being with an opposite pitch.
  • It comprises the four pole elements 6a, 7a, and 6b, 7b which are respectively mounted on the uxeimpermeable elements Sa or 8b which are coiled in opposite pitches and which at one end abut a piston 9 serving as a support for the magnets Sa and Sb, and at the other end when necessary--on compressionthey abut aV circlip 10a and 10b inside the suppor-ting shaft 3.
  • the direction of flow of the pump liquid can be reversed by hydraulic application to one face of the piston 9, the diaphragm Ithen being urged by the magnetic system coiled in the opposite direction to that previously in operation, without it being necessary to change the direction of rotation of the motor, this being possible due to the fact that elements 8a and 8b are of an opposite pitch, as discussed above.
  • FIGS, 3 and 4 show the essential elements of the device described with reference to FIGS. 1 and 2, namely the diaphragm M outside the tubular element 1 in which rotates the shaft 3 fitted in the frame P.
  • the ends of the diaphragm M have peripheral beads 11 by means of which the diaphragm is supported on the ends 12 of the tubular element 1 and on the ared surfaces 13 of the frame P covered by extensions 14 of the diaphragm.
  • the uid for delivery arrives at the tube 15 4and leaves by the tube 16.
  • the diaphragm M is mounted on free rings 17 of magnetic material which are fitted between peripheral ribs 1S for guiding the elment 1 by means of much narrower rings 19 and 20 than -the rings 17, said rings 19 and 20 being partially embedded in the inner wall of the diaphragm; the rings 19, which are slightlyv thicker than the rings 20, are disposed substantially symmetrically with respect to the rings 17, which they surround with very little clearance, while the rings 20 straddle the adjacent edges of two consecutive rings 17, with respect to which they have a fairly considerable clearance.
  • This ring system gives a very uniform helical deformation of the diaphragm with only a small number of magnetic rings 17.
  • the rings 19 and 20 may be of metal or of a fairly rigid synthetic material.
  • the end rings 17a are bored to a smaller dimension than the other rings 17, in order to reduce deformation of the diaphragm near its securing means.
  • the guide ribs 18 enable the thickness of the tubular element 1 to be reduced to a minimum in order to reduce magnetic losses.
  • the shaft 3 bears magnets 21 in the form of split rings mounted on supports 22, for example of bronze and having a projection 23 engaging between the poles of the magnets (FIG. 4).
  • Supports 22 are strung on .the shaft 3 between a shoulder 24 and a stop washer 25 which is locked by a split ring 26 (FIG. 3).
  • T-hese elements are axially fixed by balls 27 mounted in peripheral grooves 28 of the shaft 3.
  • the supports 22 are formed with a recess 29 housing a block 30 of rubber or similar flexible material.
  • the various blocks 30 are drilled for the passage of a coarse-pitch helical spring 31 one end 31a of which is fitted in an aperture in the shoulder 24 and the other end 31b of which is secured to an annular piston 32 which is slidable and rotatable on the corresponding end of the shaft 3 in a cylindrical chamber 33 formed in the frame P.
  • Ducts 34 and 35 provide for the intake and discharge of pressure fluid on either side of the piston 32 so that the latter can move in its cylinder 33 to vary the pitch of the spring 31 and hence the angular offset 21.
  • the projection 23 on the supports 22 also has a flat 36 at its outer portion so that a helical tool of magnetic material can be introduced between the rotor 21, 22 and the tubular element 1 in order to close the flux on assembly. This tool is then withdrawn on commissioning. It prevents any sticking due to uncontrolled attraction during installation.
  • the device operates like the device described wi-th reference to FIGS. 1 and 2 but on starting up all the magnets are in contact with the corresponding rings 17 so that the pressure outside the diaphragm tends to oppose the rotation. Because of their resilient mounting on the shaft 3 the magnets 21 undergo an angular offset when the pump rotates. After starting, the magnets return to their operative positionY under the return action of the spring 31 whose deformation enabled the delivery and hence the power on starting to be reduced.
  • the general pitch can be varied by means of the piston 32 by the application of pressure liquid via the ducts 34 or 35.
  • a semi-rotary magnetic device for driving tubular diaphragm pumps comprising rin-gs of magnetic material distributed along the length of -the diaphragm and means for subjecting said rings to variable magnetic flux in order to produce the required deformation of the diaphragm.
  • a device according to claim 1 wherein the said means comprise at least one magnet which rotates with respect to the system formed by the rings and the diaphragm.
  • a device according to claim 1 wherein the said means comprises at least one magnet which rotates with respect to the sytem formed .by the rings and the diaphragm, and which acts on the rings through the agency of pole elements disposed al-ong helixes coaxial with the diaphragm.
  • the said means comprise at least one magnet which rotates with respect to the system formed by the rings and the diaphragm, and which acts on the rings through the agency of pole elemen-ts disposed along helixes coaxial with the diaphragm, a tubular partition permeable to the magnetic ux separating the magnets an-d the pole elements from the rings.
  • a device comprising at least one magnet which rotates with respect to the system formed by the rings and the diaphragm, and which acts on the rings through the agency of pole elements -disposed along helixes coaxial with the diaphragm, means being provided to vary .the pitch of the pole elements.
  • a device comprising at least one magnet which rotates with lrespect to the system formed by the rings and the diaphrag-m, and which acts on the rings through .the agency of pole elements disposed along helixes coaxial with the diaphragm, and wherein the pole elements are flexible and one of their ends is connected to a ring which forms a piston 'between the tubular partition and the drive shaft for .the said lpole elements, means being provided to apply a pressure uid to the ring piston in order to vary the pitch of the pole elements.
  • the said means comprise at least one magnet which rotates with respect to the system formed Iby the rings and the diaphragm, and which acts lon the rings through the agency of pole elements disposed along helixes coaxial with the diaphragm, and wherein the pole ele-ments are exible and one of their ends is connected to a ring which forms a piston between the tubular partition and the drive shaft for the said pole elements, means being provided to apply a pressure fluid to the ring piston in order to vary the pitch of the pole elements, and wherein the ring piston bears magnets on its two surfaces, the said magnets corresponding to opposite-pitch helical pole elements, ducts for the passage of hydraulic fluid being provided on either side of the ring in order to permit operation of one or :other of the sets of pole elements in order to reverse the direction of operation of the pump.
  • the said means comprise at least one magnet which rotates with respect to the system formed by the rings and the diaphragm, and which acts on the rings through the agency of pole elements disposed along helixes coaxial with the diaphragm, and wherein the pole elements are flexible and one of their ends is connected to a ring which forms a .piston between the tubular partition and the drive shaft for the said .pole elements, means -being provided to apply a pressure uid to the ring piston in order to vary the pitch of the pole elements, and wherein the ring piston Ibears magnets yon its two surfaces, the said magnets corresponding to oppositepitch helical pole elements,
  • the said means comprise at least one magnet which rotates with respect to the system formed -by the rings and the diaphragm, the magnets being in the form of split rings mounted coaxially of the rotary shaft and regularly offset from one another about the axis of said shaft.
  • a device according toclaim 1, wherein the said means comprise at least one magnet which rotates with 3,279, ses.
  • the magnets being in thefonm of split rings mounted coaxially of the rotary shaft and regularly offset from one another about the axis of said shaft and means being provided for varying the amount of oifset of the magnets.
  • a -device according to claim 1 wherein the said means comprise at least one magnet which rotates with respect to the system formed by the rings and the diaphragm, the magnets being in the form of split rings mounted coaxially of 4the rotary shaft and regularly oftset from one another about the axis of said shaft, the magnets being mounted on supports having a projection tted between their poles.
  • a device comprising at least one magnet which rotates with respect to the system formed by the rings an-d the diaphragm, the magnets being in the fonm of split rings mounted coaxially of the rotary shaft and regularly offset from sone another about the axis of said shaft, the magnets being mounted on supports having a .projection itted between their poles and the said supports being mounted loosely on lthe shaft and connected to one an-l other and t-o the latter by a resilient device.
  • the said means comprise at least one magnet which rotates with respect to the system formed by the rings and the diaphragm, the magnets being in the form of split rings mounted coaxially of the rotary shaft and regularly offset from one another about the axis of said shaft, the Ina-g- .nets being mounted on su-pzports having a projection itted between their poles and the said supports being mounted loosely on the shaft and connected to one another and to the latter by a resilient ⁇ device comprising a spring one end of which is secured to the shaft which is connected to the supports yby flexible blocks, and the free end of which is connected to a piston which can be moved in a chamber at the end lof the shaft, ducts being provided on either side of the piston for moving the latter in the chamber by means of a compressed fluid.
  • the said means comprise at least one magnet which rotates with respect to the system formed 'by -the rings and the diaphrag-m, the magnets being in the form of split rings mounted coaxially of the rotary shaft and regularly offset from one another about -the axis of said shaft, the magnets being mounted on supports havin-g a lprojection fitted between their poles, the said supports being mounted on the shaft by means of rings of balls.
  • a device comprising at least one magnet which rotates with respect t-o the system formed by the rings and the diaphr'agrn, and which acts on the rings through the agency of .pole elements disposed along heliXes coaxial with the diaphragm, a tubular partition permeable t-o the magnetic iiux separating the magnets and the pole elements from the rings, ⁇ and the said magnetic rings being guided by ribs .provided on the tubular element.
  • a semi-'rotary magnetic device for driving tubular diaphragm pumps comprising rings of magnetic material distributed along the length of the diaphragm and means f-or subjecting said rings to variable magnetic flux in order to produce the 'required deformation of the diaphragm, the said diaphragm bearing on the magnetic rings through the agency of rings of which there are one more than twice the number of magnetic rings, some of these rings surrounding the corresponding magnetic rin-g without kany appreciable clearance and others straddling the ends of two contiguous magnetic rings with some clearance.
  • a semi-rotary magnetic device for driving tubular diaphragm pumps comprising rings of magnetic material distributed along the length of the diaphragm and means for subjecting said rings to variable magnetic ux in order to :produce the required defonmation of the diaphragm, the said diaphragm bearing on the magnetic rings through the agency of rings of which there are one more than twice the number of magnetic rings, some of -these rings surrounding the corresponding magnetic ring Without any appreciable clearance and others straddling the ends of two contiguous magnetic rings with some clearance, the end magnetic rings having a smaller bore than the others.
  • a semi-notary magnetic device for driving tubular diaphragm pumps comprising rings of magnetic material distributed along the length of the diaphragm and means for subjecting said rings to variable magnetic flux in order to produce -the required deformation of the diaphragm, the said ldiaphragm bearing on the body of the device through the agency of wide beads and flared extensions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US399143A 1963-09-30 1964-09-25 Semi-rotary magnetic device Expired - Lifetime US3279388A (en)

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FR949106A FR1378193A (fr) 1963-09-30 1963-09-30 Dispositif magnétique semi-rotatif

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5286176A (en) * 1993-05-06 1994-02-15 The United States Of America As Represented By The Secretary Of The Navy Electromagnetic pump
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US5846064A (en) * 1994-09-06 1998-12-08 Metameric Limited Peristaltic pump
US6234773B1 (en) 1994-12-06 2001-05-22 B-Braun Medical, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US20160090979A1 (en) * 2013-05-23 2016-03-31 Hanning Elektro-Werke Gmbh & Co. Kg Pump arrangement
US10837444B2 (en) 2018-09-11 2020-11-17 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines with offset
US10844720B2 (en) 2013-06-05 2020-11-24 Rotoliptic Technologies Incorporated Rotary machine with pressure relief mechanism
US11802558B2 (en) 2020-12-30 2023-10-31 Rotoliptic Technologies Incorporated Axial load in helical trochoidal rotary machines
US11815094B2 (en) 2020-03-10 2023-11-14 Rotoliptic Technologies Incorporated Fixed-eccentricity helical trochoidal rotary machines
US12146492B2 (en) 2021-01-08 2024-11-19 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines with improved solids handling
US12352268B2 (en) 2021-01-08 2025-07-08 Rotoliptic Technologies Incorporated Pumps, compressors, and expanders with a teardrop-shaped rotor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5826979A (en) * 1996-08-26 1998-10-27 Foss; Milton K. Waste material processing apparatus and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922196A (en) * 1932-03-17 1933-08-15 Nordberg Manufacturing Co Pump
US2278821A (en) * 1939-10-13 1942-04-07 Louise Gunnila Violet Bennet Fluid engine
FR1008458A (fr) * 1950-01-17 1952-05-19 Perfectionnements aux pompes travaillant seules ou accouplées à d'autres pompes
AT175516B (de) * 1951-03-12 1953-07-25 Maka Rasierklingenwerk Karl We Rasierapparat
US2888877A (en) * 1956-04-19 1959-06-02 Ohio Commw Eng Co Apparatus for pumping
US3089425A (en) * 1961-01-30 1963-05-14 Thompson Ramo Wooidridge Inc Magnetic pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1922196A (en) * 1932-03-17 1933-08-15 Nordberg Manufacturing Co Pump
US2278821A (en) * 1939-10-13 1942-04-07 Louise Gunnila Violet Bennet Fluid engine
FR1008458A (fr) * 1950-01-17 1952-05-19 Perfectionnements aux pompes travaillant seules ou accouplées à d'autres pompes
AT175516B (de) * 1951-03-12 1953-07-25 Maka Rasierklingenwerk Karl We Rasierapparat
US2888877A (en) * 1956-04-19 1959-06-02 Ohio Commw Eng Co Apparatus for pumping
US3089425A (en) * 1961-01-30 1963-05-14 Thompson Ramo Wooidridge Inc Magnetic pump

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5286176A (en) * 1993-05-06 1994-02-15 The United States Of America As Represented By The Secretary Of The Navy Electromagnetic pump
US5846064A (en) * 1994-09-06 1998-12-08 Metameric Limited Peristaltic pump
US5660529A (en) * 1994-12-06 1997-08-26 Mcgaw, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US5888052A (en) * 1994-12-06 1999-03-30 Mcgraw, Inc. Linear peristaltic pump with reshaping fingers intedigitated with pumping elements
US6234773B1 (en) 1994-12-06 2001-05-22 B-Braun Medical, Inc. Linear peristaltic pump with reshaping fingers interdigitated with pumping elements
US20160090979A1 (en) * 2013-05-23 2016-03-31 Hanning Elektro-Werke Gmbh & Co. Kg Pump arrangement
US10844720B2 (en) 2013-06-05 2020-11-24 Rotoliptic Technologies Incorporated Rotary machine with pressure relief mechanism
US11506056B2 (en) 2013-06-05 2022-11-22 Rotoliptic Technologies Incorporated Rotary machine
US10844859B2 (en) * 2018-09-11 2020-11-24 Rotoliptic Technologies Incorporated Sealing in helical trochoidal rotary machines
US10837444B2 (en) 2018-09-11 2020-11-17 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines with offset
US11306720B2 (en) 2018-09-11 2022-04-19 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines
US11499550B2 (en) 2018-09-11 2022-11-15 Rotoliptic Technologies Incorporated Sealing in helical trochoidal rotary machines
US11608827B2 (en) 2018-09-11 2023-03-21 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines with offset
US11988208B2 (en) 2018-09-11 2024-05-21 Rotoliptic Technologies Incorporated Sealing in helical trochoidal rotary machines
US11815094B2 (en) 2020-03-10 2023-11-14 Rotoliptic Technologies Incorporated Fixed-eccentricity helical trochoidal rotary machines
US11802558B2 (en) 2020-12-30 2023-10-31 Rotoliptic Technologies Incorporated Axial load in helical trochoidal rotary machines
US12473912B2 (en) 2020-12-30 2025-11-18 Rotoliptic Technologies Incorporated Axial load in helical trochoidal rotary machines
US12146492B2 (en) 2021-01-08 2024-11-19 Rotoliptic Technologies Incorporated Helical trochoidal rotary machines with improved solids handling
US12352268B2 (en) 2021-01-08 2025-07-08 Rotoliptic Technologies Incorporated Pumps, compressors, and expanders with a teardrop-shaped rotor

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Publication number Publication date
FR1378193A (fr) 1964-11-13

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