US20110014072A1 - Non-intrusive vapor detector for magnetic drive pump - Google Patents

Non-intrusive vapor detector for magnetic drive pump Download PDF

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Publication number
US20110014072A1
US20110014072A1 US12/582,127 US58212709A US2011014072A1 US 20110014072 A1 US20110014072 A1 US 20110014072A1 US 58212709 A US58212709 A US 58212709A US 2011014072 A1 US2011014072 A1 US 2011014072A1
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US
United States
Prior art keywords
pump
magnet rotor
bubble detector
sealing wall
rotor
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.)
Abandoned
Application number
US12/582,127
Inventor
David Clark
Phil Harper
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.)
HMD Seal Less Pumps Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HMD SEALLESS PUMPS LIMITED reassignment HMD SEALLESS PUMPS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARPER, PHIL, CLARK, DAVID
Assigned to HMD SEALLESS PUMPS LIMITED reassignment HMD SEALLESS PUMPS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CLARK, DAVID, HARPER, PHIL
Assigned to HMD SEAL/LESS PUMPS LIMITED reassignment HMD SEAL/LESS PUMPS LIMITED CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE NAME HMD SEALLESS PUMPS LIMITED PREVIOUSLY RECORDED ON REEL 024406 FRAME 0001. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNEE NAME HMD SEAL/LESS PUMPS LIMITED. Assignors: CLARK, DAVID, HARPER, PHIL
Publication of US20110014072A1 publication Critical patent/US20110014072A1/en
Assigned to SUNDYNE, LLC reassignment SUNDYNE, LLC CONVERSION OF CORPORATION TO LLC Assignors: SUNDYNE CORPORATION
Assigned to DEUTSCHE BANK AG NY YORK BRANCH, AS COLLATERAL AGENT reassignment DEUTSCHE BANK AG NY YORK BRANCH, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: HMD SEAL/LESS PUMPS LIMITED
Assigned to DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT reassignment DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT CORRECTIVE ASSIGNMENT TO CORRECT THE SPELLING OF THE NAME OF THE RECEIVING PARTY IN THE SECURITY AGREEMENT PREVIOUSLY RECORDED ON REEL 029496 FRAME 0135. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Assignors: HMD SEAL/LESS PUMPS LIMITED
Assigned to DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT reassignment DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: SUNDYNE, LLC
Assigned to HMD SEAL/LESS PUMPS LIMITED reassignment HMD SEAL/LESS PUMPS LIMITED TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS RECORDED AT REEL/FRAME 029496/0135 AND 029530/0292 Assignors: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Assigned to SUNDYNE, LLC reassignment SUNDYNE, LLC TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS RECORDED AT REEL/FRAME 029530/0539 Assignors: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/02433—Gases in liquids, e.g. bubbles, foams

Definitions

  • This application relates to the use of a vapor detector for detecting gas in a liquid flow in a magnetic drive pump.
  • Magnetic drive pumps are known, and typically include a magnetic coupling that drives a centrifugal pump impeller.
  • a motor drive is connected to the outer magnetic rotor of the magnetic coupling.
  • the inner magnetic rotor of the magnetic coupling is connected to the pump impeller.
  • a sealing wall is positioned between the outer magnetic and inner magnetic rotors, and provides a complete fluid seal, ensuring that the outer magnetic rotor is maintained in a “dry” side. Liquid circulates within a “wet” side in the interior of the wall.
  • the centrifugal pump impeller moves liquid from an inlet to an outlet.
  • Prior art has comprised a bubble detector for detecting bubbles, or other gas within the liquid that has been positioned in the wet side of the pump.
  • a magnetic drive pump includes a magnetic coupling that drives a centrifugal pump.
  • a motor drives the outer magnetic rotor of the magnetic coupling.
  • the outer magnetic rotor is positioned radially outward of a sealing wall.
  • the inner magnetic rotor is positioned radially within the sealing wall. Rotation of the outer magnetic rotor causes the inner magnet rotor to rotate.
  • the inner magnet rotor drives a centrifugal pump impeller to move a liquid.
  • a bubble detector is positioned outward of the wall such that it is in a dry side of the pump. The bubble detector sends a signal into the wet side of the pump to identify the existence of a gas within a pump liquid.
  • FIG. 1 is a cross-sectional view through the inventive pump.
  • FIG. 2 is a detail of the mounting of a bubble detector probe.
  • FIG. 1 A magnetic drive pump is illustrated in FIG. 1 having a sealing wall 22 separating a dry side 23 from a wet side 40 for a fluid pump.
  • a separate motor drives a shaft 28 , through a bearing housing 24 .
  • Shaft 28 drives an outer magnet rotor 30 , which is positioned outward of the wall 22 .
  • Magnetic flux passes through the wall 22 and drives an inner magnet rotor 32 .
  • a centrifugal pump impeller 34 is connected to the inner magnet rotor 32 . Fluid passes from an inlet 35 to the impeller 34 , and is driven to an outlet 37 .
  • a bubble detector probe 36 is positioned outward of the wall 22 and communicates with a control 38 .
  • the probe may be an ultrasonic probe that will transmit and receive an ultrasonic signal.
  • the signal transmission through liquid is different to the signal transmission through gas. Therefore, the probe can determine whether the fluid inside the wet chamber is liquid, gas or a mixture of liquid and gas.
  • the magnetic drive pump includes a “wet” side 40 , which receives some of the liquid being pumped by the impeller 34 , such that the liquid can circulate around the components radially within the sealing wall 22 .
  • a “dry” side 23 is positioned radially outward of the wall and does not receive the liquid.
  • Probe 36 is positioned in the dry side 23 .
  • the probe 36 faces a portion of the wet side 40 spaced away from the impeller 34 . This positioning aligns the probe 36 with a portion of the chamber that is separated from the impeller by a housing wall 100 .
  • the probe 36 is positioned to be opposite a bushing holder 100 .
  • An outer housing wall 101 receives an olive/nut arrangement 110 to clamp and hold the probe into the housing.
  • the sealing wall 22 is formed of non-magnetic material.
  • the technology for forming an appropriate ultrasonic transmitter to send a signal through the wall 22 , and against the opposed surface, is known.
  • the controller 38 will be able to determine if bubbles of vapor or gas are within the pump fluid by analyzing the returned signal. While the technology for providing such a probe is known, such a probe has not been utilized in this non-invasive manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

A magnetic drive pump includes a magnetic coupling comprising an outer magnet rotor and an inner magnet rotor. The outer magnet rotor is driven by a separate motor. The outer magnet rotor is positioned radially outward of a sealing wall. The inner magnet rotor is positioned radially within the sealing wall, such that rotation of the inner magnet rotor causes the pump rotor to in turn rotate. The pump rotor drives a centrifugal pump impeller to move a liquid. A bubble detector is positioned outward of the wall such that it is in a dry side of the pump. The bubble detector sends a signal into a wet side of the pump to identify the existence of a gas within a pump fluid.

Description

    RELATED APPLICATION
  • This application claims priority to GB application 0912515.4, which was filed Jul. 17, 2009.
    • BACKGROUND OF THE INVENTION
  • This application relates to the use of a vapor detector for detecting gas in a liquid flow in a magnetic drive pump.
  • Magnetic drive pumps are known, and typically include a magnetic coupling that drives a centrifugal pump impeller. A motor drive is connected to the outer magnetic rotor of the magnetic coupling. The inner magnetic rotor of the magnetic coupling is connected to the pump impeller. A sealing wall is positioned between the outer magnetic and inner magnetic rotors, and provides a complete fluid seal, ensuring that the outer magnetic rotor is maintained in a “dry” side. Liquid circulates within a “wet” side in the interior of the wall. The centrifugal pump impeller moves liquid from an inlet to an outlet.
  • Prior art has comprised a bubble detector for detecting bubbles, or other gas within the liquid that has been positioned in the wet side of the pump.
    • SUMMARY OF THE INVENTION
  • A magnetic drive pump includes a magnetic coupling that drives a centrifugal pump. A motor drives the outer magnetic rotor of the magnetic coupling. The outer magnetic rotor is positioned radially outward of a sealing wall. The inner magnetic rotor is positioned radially within the sealing wall. Rotation of the outer magnetic rotor causes the inner magnet rotor to rotate. The inner magnet rotor drives a centrifugal pump impeller to move a liquid. A bubble detector is positioned outward of the wall such that it is in a dry side of the pump. The bubble detector sends a signal into the wet side of the pump to identify the existence of a gas within a pump liquid.
  • These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a cross-sectional view through the inventive pump.
  • FIG. 2 is a detail of the mounting of a bubble detector probe.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A magnetic drive pump is illustrated in FIG. 1 having a sealing wall 22 separating a dry side 23 from a wet side 40 for a fluid pump. A separate motor drives a shaft 28, through a bearing housing 24. Shaft 28 drives an outer magnet rotor 30, which is positioned outward of the wall 22. Magnetic flux passes through the wall 22 and drives an inner magnet rotor 32. A centrifugal pump impeller 34 is connected to the inner magnet rotor 32. Fluid passes from an inlet 35 to the impeller 34, and is driven to an outlet 37.
  • A bubble detector probe 36 is positioned outward of the wall 22 and communicates with a control 38. The probe may be an ultrasonic probe that will transmit and receive an ultrasonic signal. The signal transmission through liquid, is different to the signal transmission through gas. Therefore, the probe can determine whether the fluid inside the wet chamber is liquid, gas or a mixture of liquid and gas.
  • The magnetic drive pump includes a “wet” side 40, which receives some of the liquid being pumped by the impeller 34, such that the liquid can circulate around the components radially within the sealing wall 22. In addition, a “dry” side 23 is positioned radially outward of the wall and does not receive the liquid. Probe 36 is positioned in the dry side 23.
  • As can be appreciated, the probe 36 faces a portion of the wet side 40 spaced away from the impeller 34. This positioning aligns the probe 36 with a portion of the chamber that is separated from the impeller by a housing wall 100.
  • As can be appreciated from FIG. 2, and with reference to FIG. 1, the probe 36 is positioned to be opposite a bushing holder 100. An outer housing wall 101 receives an olive/nut arrangement 110 to clamp and hold the probe into the housing.
  • The sealing wall 22 is formed of non-magnetic material. The technology for forming an appropriate ultrasonic transmitter to send a signal through the wall 22, and against the opposed surface, is known. Essentially, the controller 38 will be able to determine if bubbles of vapor or gas are within the pump fluid by analyzing the returned signal. While the technology for providing such a probe is known, such a probe has not been utilized in this non-invasive manner.
  • Although an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.

Claims (5)

1. A magnetic drive pump comprising:
a motor driving a magnetic coupling via a shaft;
said shaft driving an outer magnet rotor, said outer magnet rotor being positioned radially outward of a sealing wall;
an inner magnet rotor positioned radially within said sealing wall, and such that rotation of said inner magnet rotor causes a centrifugal pump impeller to move a liquid; and
a bubble detector positioned outward of said sealing wall such that it is in a dry side of said pump, said bubble detector sending a signal into a wet side of said pump to identify the existence of a gas within a pump liquid.
2. The pump as set forth in claim 1, wherein said bubble detector is an ultrasonic detector.
3. The pump as set forth in claim 1, wherein said bubble detector communicates with a control.
4. The pump as set forth in claim 1, wherein said bubble detector is positioned adjacent to a portion of the wet side of said pump which is spaced from said centrifugal pump impeller.
5. The pump as set forth in claim 4, wherein a housing separates said centrifugal pump impeller from said portion of said wet side that is associated with said bubble detector.
US12/582,127 2009-07-17 2009-10-20 Non-intrusive vapor detector for magnetic drive pump Abandoned US20110014072A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0912515A GB2471908B (en) 2009-07-17 2009-07-17 Non-intrusive vapour detector for magnetic drive pump
GB0912515.4 2009-07-17

Publications (1)

Publication Number Publication Date
US20110014072A1 true US20110014072A1 (en) 2011-01-20

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US12/582,127 Abandoned US20110014072A1 (en) 2009-07-17 2009-10-20 Non-intrusive vapor detector for magnetic drive pump

Country Status (13)

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US (1) US20110014072A1 (en)
JP (1) JP2011021596A (en)
KR (1) KR20110007946A (en)
CN (1) CN101956715B (en)
AR (1) AR078074A1 (en)
BR (1) BRPI1016226A2 (en)
CA (1) CA2706266C (en)
CL (1) CL2010000550A1 (en)
CO (1) CO6280068A1 (en)
DE (1) DE102010026414B4 (en)
GB (1) GB2471908B (en)
RU (1) RU2472038C2 (en)
ZA (1) ZA201003880B (en)

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CN114828705A (en) * 2019-12-19 2022-07-29 皇家飞利浦有限公司 Stream delivery system

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JP5671359B2 (en) 2010-03-24 2015-02-18 株式会社神戸製鋼所 High strength steel plate with excellent warm workability
CN103291640B (en) * 2012-02-29 2016-07-06 黄佳华 Shurry pump under a kind of vertical nitrogen sealing gland cooling magnetic liquid
US9771938B2 (en) 2014-03-11 2017-09-26 Peopleflo Manufacturing, Inc. Rotary device having a radial magnetic coupling
US9920764B2 (en) 2015-09-30 2018-03-20 Peopleflo Manufacturing, Inc. Pump devices
GB2581340B (en) 2019-02-08 2023-02-22 Hmd Seal/Less Pumps Ltd Magnetic pump
DE102019002392A1 (en) 2019-04-02 2020-10-08 KSB SE & Co. KGaA Thermal barrier
CN111156174B (en) * 2019-12-31 2021-04-13 六安市中盛泵阀制造有限公司 Multifunctional magnetic pump

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US6666015B2 (en) * 2002-01-28 2003-12-23 Hamilton Sundstrand Simplified fuel control for use with a positive displacement pump
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US4047847A (en) * 1975-03-26 1977-09-13 Iwaki Co., Ltd. Magnetically driven centrifugal pump
US4661097A (en) * 1984-06-01 1987-04-28 The Johns Hopkins University Method for clearing a gas bubble from a positive displacement pump contained within a fluid dispensing system
US4838763A (en) * 1986-11-20 1989-06-13 Heyko Reinecker Canned motor pump
US6085574A (en) * 1995-01-05 2000-07-11 Debiotech S.A. Device for controlling a liquid flow in a tubular duct and particularly in a peristaltic pump
US6017198A (en) * 1996-02-28 2000-01-25 Traylor; Leland B Submersible well pumping system
US6012909A (en) * 1997-09-24 2000-01-11 Ingersoll-Dresser Pump Co. Centrifugal pump with an axial-field integral motor cooled by working fluid
US6547951B1 (en) * 1999-03-15 2003-04-15 Daishin Design Corporation Method and apparatus for treatment of organic matter-containing wastewater
US6447269B1 (en) * 2000-12-15 2002-09-10 Sota Corporation Potable water pump
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US6722854B2 (en) * 2001-01-24 2004-04-20 Sundyne Corporation Canned pump with ultrasonic bubble detector
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US6666015B2 (en) * 2002-01-28 2003-12-23 Hamilton Sundstrand Simplified fuel control for use with a positive displacement pump
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114828705A (en) * 2019-12-19 2022-07-29 皇家飞利浦有限公司 Stream delivery system

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RU2472038C2 (en) 2013-01-10
RU2010129213A (en) 2012-01-20
AR078074A1 (en) 2011-10-12
GB2471908A (en) 2011-01-19
CN101956715B (en) 2013-03-13
CA2706266A1 (en) 2011-01-17
GB0912515D0 (en) 2009-08-26
DE102010026414A1 (en) 2011-02-10
CO6280068A1 (en) 2011-05-20
GB2471908B (en) 2011-11-16
ZA201003880B (en) 2011-02-23
DE102010026414B4 (en) 2014-03-06
KR20110007946A (en) 2011-01-25
CA2706266C (en) 2013-10-01
BRPI1016226A2 (en) 2013-12-24
CL2010000550A1 (en) 2010-09-10
JP2011021596A (en) 2011-02-03
CN101956715A (en) 2011-01-26

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AS Assignment

Owner name: HMD SEALLESS PUMPS LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CLARK, DAVID;HARPER, PHIL;SIGNING DATES FROM 20090717 TO 20090902;REEL/FRAME:023395/0862

AS Assignment

Owner name: HMD SEALLESS PUMPS LIMITED, UNITED KINGDOM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CLARK, DAVID;HARPER, PHIL;SIGNING DATES FROM 20100518 TO 20100519;REEL/FRAME:024406/0001

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