Electricity: measuring and testing – Magnetic – Displacement
Patent
1996-12-05
1999-09-21
Brock, Michael
Electricity: measuring and testing
Magnetic
Displacement
32420718, 32420722, G01R 3300, G01M 1304
Patent
active
059558806
ABSTRACT:
A bearing monitor for use with a canned motor pump having a wound stator and a rotor drivably coupled to an impeller, the rotor being mounted on radial journal bearings and axial thrust bearings within a containment can comprises a first and a second target embedded in an outer periphery of the rotor in axial proximity to a first and a second end of the rotor. The monitor includes a plurality of sensors mounted external to the containment can in axial proximity to each of the two targets and radially displaced approximately equally around the periphery of the containment can. A plurality of magnetic field generators create local magnetic fields coupled through the containment can, process fluid, rotor, and at least a portion of one target to one of the sensors. In response to each field, each sensor generates an output signal which varies as a result in a change in the magnetic circuit reluctance caused by bearing wear. A monitor circuit is coupled to the sensors and compares their output signals to generate a scaled output which is approximately linearly related to bearing wear. The output of sensors in the same axial plane are utilized to determine bearing wear in a radial direction, while the output of sensors in different axial planes are utilized to determine bearing wear in an axial direction. Electromagnetic shielding may be used depending on the environmental and operating conditions.
REFERENCES:
patent: 1480848 (1924-01-01), Walsh
patent: 2939074 (1960-05-01), Perrett
patent: 2949576 (1960-08-01), Bolton
patent: 3079548 (1963-02-01), Robinson
patent: 3100989 (1963-08-01), Jones
patent: 3109095 (1963-10-01), Van Horne
patent: 3170112 (1965-02-01), Bungardt et al.
patent: 3307164 (1967-02-01), Zimmer
patent: 3373300 (1968-03-01), Sullivan
patent: 3381216 (1968-04-01), Sibley, Jr. et al.
patent: 3541394 (1970-11-01), Brenneman et al.
patent: 3613000 (1971-10-01), Weir et al.
patent: 3721842 (1973-03-01), Stevenson et al.
patent: 3745509 (1973-07-01), Woodward et al.
patent: 3891918 (1975-06-01), Ellis
patent: 3981621 (1976-09-01), Considine
patent: 3988624 (1976-10-01), Urban
patent: 3991701 (1976-11-01), Sato
patent: 4059794 (1977-11-01), Furness et al.
patent: 4114960 (1978-09-01), Habermann et al.
patent: 4128147 (1978-12-01), Lafuent Ruberte
patent: 4157612 (1979-06-01), Rainal
patent: 4182168 (1980-01-01), Desch
patent: 4196613 (1980-04-01), Cole
patent: 4199718 (1980-04-01), Ikeda et al.
patent: 4211973 (1980-07-01), Sato et al.
patent: 4334189 (1982-06-01), Sato
patent: 4379291 (1983-04-01), Hubbard et al.
patent: 4380875 (1983-04-01), Erickson et al.
patent: 4401946 (1983-08-01), Klimstra
patent: 4406999 (1983-09-01), Ward
patent: 4423635 (1984-01-01), Senicourt et al.
patent: 4473259 (1984-09-01), Goldowsky
patent: 4493042 (1985-01-01), Shima et al.
patent: 4563643 (1986-01-01), Leschek et al.
patent: 4584865 (1986-04-01), Hutchins
patent: 4639054 (1987-01-01), Kersbergen
patent: 4717874 (1988-01-01), Ichikawa et al.
patent: 4743786 (1988-05-01), Ichikawa et al.
patent: 4764767 (1988-08-01), Ichikawa et al.
patent: 4775947 (1988-10-01), Marron
patent: 4833405 (1989-05-01), Richards et al.
patent: 4849666 (1989-07-01), Hoag
patent: 4851772 (1989-07-01), Acht et al.
patent: 4875785 (1989-10-01), Santos et al.
patent: 4906924 (1990-03-01), Zannis
patent: 4924180 (1990-05-01), Nasr et al.
patent: 4931728 (1990-06-01), Hata et al.
patent: 4952874 (1990-08-01), Stadtfeld
patent: 4991301 (1991-02-01), Hore
patent: 4992733 (1991-02-01), Griebeler
patent: 5006797 (1991-04-01), Smith
patent: 5027819 (1991-07-01), Crum
patent: 5036236 (1991-07-01), Wilson
patent: 5072181 (1991-12-01), Burger
patent: 5083084 (1992-01-01), Bauer et al.
patent: 5140858 (1992-08-01), Nishimoto et al.
patent: 5198763 (1993-03-01), Konishi
patent: 5214378 (1993-05-01), Hore
patent: 5245160 (1993-09-01), Quabeck et al.
patent: 5248940 (1993-09-01), Patience et al.
patent: 5277543 (1994-01-01), Noguchi et al.
patent: 5300841 (1994-04-01), Preston et al.
patent: 5302894 (1994-04-01), Hrubes
patent: 5315244 (1994-05-01), Griebeler
patent: 5319270 (1994-06-01), Tanaka et al.
patent: 5325005 (1994-06-01), Denk
patent: 5336996 (1994-08-01), Rusnak
patent: 5355041 (1994-10-01), Shirao et al.
patent: 5363033 (1994-11-01), Suda et al.
patent: 5406155 (1995-04-01), Persson
patent: 5430372 (1995-07-01), Hecht
patent: 5448924 (1995-09-01), Nagai et al.
patent: 5696444 (1997-12-01), Kipp et al.
O'Connor, Leo; "Active Magnetic Bearings Give Systems a Lift"; Mechanical Engineering; Jul. 1992; pp. 52-54.
Weise, David A. & Tome, David M.; "Magnetic Bearings Attract Attention"; Power Transmission Design, pp. 21-22.
Noltingk, B.E.; "Instrumentation Reference Book"; Second Edition; Butterworth Heinemann, no date.
Herceg, Edward E.; "Handbook of Measurement and Control"; Revised Edition; Schaevitz Engineering, no date.
NERAC Listing--Patents Related: (Inductively) Sensing Movement in Rotating Equipment using Multiple Internal Sensors, pre-'94.
Graf. Rudolf F.; "Modern Dictionary of Electronics"; Howard W. Sams & Co., Inc.; p. 193, no date.
Product Brochure "Protect your Pumps from Dry Running" created in Jul. 1996 for Ansimag Inc. of Elk Grove Village, Illinois.
DRY-KUT Instruction Manual for "Monitors to Protect Your Pumps from Dry-Running and Overloading" created in 1996 for Ansimag, Inc. of Elk Grove Village, Illinois.
Sundstrand Fluid Handling Brochure entitled "Sundyne Vertical Integrated Pump", Bulletin 11.1, dated Feb., 1992.
Sundstrand Fluid Handling Brochure entitled "Sundyne Canned Motor Pumps", Bulletin 1.4, dated Aug., 1995.
Drawing labeled "Figure 1-3 NC Series Chempumps" (date unknown).
Drawing labeled "Fig. A".
Product Brochure "When Safety and Product Integrity Cannot be Compromised" HMD Seal/Less Pumps, HMD Seal/Less Pumps Ltd. 1996.
Ser. No. 08/206,461 Kipp et al., date unknown.
"Equipment News" Section, Canned Motor Pumps Approved for Explosion-Proof Duty, World Pumps, Oct. 1996, p. 12.
1 Page (No. 163) from Oct. 1992 Chemical Engineering Magazine advertising Teikoku Canned Motor Pump.
1 Article from May 25, 1994 issue of Design News entitled "Switch Senses All Metals At Equal Distances".
Beam Palmer H.
Belanger David J.
Eilers George J.
Imlach Joseph
Brock Michael
Makeever Jeffery J.
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