GB1497801A - Magnetic suspension of rotors - Google Patents

Magnetic suspension of rotors

Info

Publication number
GB1497801A
GB1497801A GB509274A GB509274A GB1497801A GB 1497801 A GB1497801 A GB 1497801A GB 509274 A GB509274 A GB 509274A GB 509274 A GB509274 A GB 509274A GB 1497801 A GB1497801 A GB 1497801A
Authority
GB
United Kingdom
Prior art keywords
rotor
energized
fluid
stationary
current
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
Application number
GB509274A
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.)
Emerson Process Management Ltd
Original Assignee
Rosemount Engineering Co 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 Rosemount Engineering Co Ltd filed Critical Rosemount Engineering Co Ltd
Priority to GB509274A priority Critical patent/GB1497801A/en
Priority to DE19752504631 priority patent/DE2504631A1/en
Publication of GB1497801A publication Critical patent/GB1497801A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

1497801 Measuring fluid-flow ROSEMOUNT ENG CO Ltd 31 Jan 1975 [4 Feb 1974] 05092/74 Heading G1R [Also in Division G3] A rotor, e.g. of fluid-flow responsive apparatus, is supported by an electromagnetic bearing energized in response to any deviation of the rotor from a desired position, as detected by a Hall device which is energized with a current proportional to that which energizes the electromagnet. As shown the apparatus is an anemometer and has upper and lower stationary "pot shaped" electromagnets 21, 14 which co-operate with ferromagnetic elements 27, 30 having concentric annular poles. These elements may be permanent magnets and their poles are of different diameter to those of the stationary magnets, as shown, to provide lateral stability. The bearings are in opposition, i.e. the upper bearing supports the rotor and the pull of the lower bearing. An eddy current brake is provided, comprising a copper disc 35 attached to the rotor and stationary electromagnets 36. The disc has holes near its periphery through which light is directed on to a photo-cell, the resultant pulses being integrated to give an analogue speed signal and also to energize the brake so as to maintain the speed substantially constant. This energizing current is a measure of the driving force on the rotor, i.e. the fluid-flow which the device measures, and is displayed on an ammeter Fig. 3, (not shown). Two alternative embodiments are described, in which the axis of the rotor is horizontal. Fig. 8 shows the arrangement whereby the electromagnet coil 115 is energized according to the difference between the output of high gain amplifier 114 and a reference 118 which represents the desired value of the gap. 114 compares the output of the Hall device with the current in 115 and energizes the device via 116.
GB509274A 1974-02-04 1974-02-04 Magnetic suspension of rotors Expired GB1497801A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB509274A GB1497801A (en) 1974-02-04 1974-02-04 Magnetic suspension of rotors
DE19752504631 DE2504631A1 (en) 1974-02-04 1975-02-04 FLOW METER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB509274A GB1497801A (en) 1974-02-04 1974-02-04 Magnetic suspension of rotors

Publications (1)

Publication Number Publication Date
GB1497801A true GB1497801A (en) 1978-01-12

Family

ID=9789613

Family Applications (1)

Application Number Title Priority Date Filing Date
GB509274A Expired GB1497801A (en) 1974-02-04 1974-02-04 Magnetic suspension of rotors

Country Status (2)

Country Link
DE (1) DE2504631A1 (en)
GB (1) GB1497801A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015133A2 (en) * 2003-04-26 2005-02-17 Imeter B.V. Electronic gas turbine flowmeter
CN102944375A (en) * 2012-10-22 2013-02-27 北京航空航天大学 Compound pneumatic data sensor applicable to micro aerial vehicle
CN109307783A (en) * 2017-07-28 2019-02-05 新疆工程学院 A kind of magnetic suspension wind-cup type anemobiagraph

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919236C2 (en) * 1979-05-12 1982-08-12 Kernforschungsanlage Jülich GmbH, 5170 Jülich Magnetic floating bearing for one rotor
DE3238433A1 (en) * 1982-10-16 1984-04-19 Vdo Adolf Schindling Ag, 6000 Frankfurt SPEEDMETER
DE3343186A1 (en) * 1983-11-29 1985-06-05 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München MAGNETIC ROTOR BEARING

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005015133A2 (en) * 2003-04-26 2005-02-17 Imeter B.V. Electronic gas turbine flowmeter
WO2005015133A3 (en) * 2003-04-26 2006-04-13 Imeter B V Electronic gas turbine flowmeter
CN102944375A (en) * 2012-10-22 2013-02-27 北京航空航天大学 Compound pneumatic data sensor applicable to micro aerial vehicle
CN102944375B (en) * 2012-10-22 2015-05-20 北京航空航天大学 Compound pneumatic data sensor applicable to micro aerial vehicle
CN109307783A (en) * 2017-07-28 2019-02-05 新疆工程学院 A kind of magnetic suspension wind-cup type anemobiagraph

Also Published As

Publication number Publication date
DE2504631A1 (en) 1975-08-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee