CA2706266C - Non-intrusive vapor detector for magnetic drive pump - Google Patents
Non-intrusive vapor detector for magnetic drive pump Download PDFInfo
- Publication number
- CA2706266C CA2706266C CA2706266A CA2706266A CA2706266C CA 2706266 C CA2706266 C CA 2706266C CA 2706266 A CA2706266 A CA 2706266A CA 2706266 A CA2706266 A CA 2706266A CA 2706266 C CA2706266 C CA 2706266C
- Authority
- CA
- Canada
- Prior art keywords
- pump
- bubble detector
- magnet rotor
- sealing wall
- set forth
- 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.)
- Active
Links
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
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
NON-INTRUSIVE VAPOR DETECTOR FOR MAGNETIC DRIVE PUMP
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
Figure 1 is a cross-sectional view through the inventive pump.
Figure 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 Figure 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 Figure 2, and with reference to Figure 1, the probe 36 is positioned to be opposite a bushing holder 102. 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.
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
Figure 1 is a cross-sectional view through the inventive pump.
Figure 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 Figure 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 Figure 2, and with reference to Figure 1, the probe 36 is positioned to be opposite a bushing holder 102. 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 (6)
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 the liquid, wherein said signal is received by said bubble detector after having been set against an opposed suface, and being transmitted back to said bubble detector through said sealing wall.
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 the liquid, wherein said signal is received by said bubble detector after having been set against an opposed suface, and being transmitted back to said bubble detector through said sealing wall.
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.
6. The pump as set forth in claim 1, wherein said bubble detector is a single unit having transmitting and receiving capabilities.
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 (2)
| Publication Number | Publication Date |
|---|---|
| CA2706266A1 CA2706266A1 (en) | 2011-01-17 |
| CA2706266C true CA2706266C (en) | 2013-10-01 |
Family
ID=41058173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2706266A Active CA2706266C (en) | 2009-07-17 | 2010-06-03 | Non-intrusive vapor detector for magnetic drive pump |
Country Status (13)
| Country | Link |
|---|---|
| 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| EP3838082A1 (en) * | 2019-12-19 | 2021-06-23 | Koninklijke Philips N.V. | A flow delivery system |
| 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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| SU104819A1 (en) * | 1956-01-12 | 1956-11-30 | С.Б. Стопский | Acoustic method for detecting cavitation in hydraulic machines and other similar devices |
| JPS51111902A (en) * | 1975-03-26 | 1976-10-02 | Iwaki:Kk | Magnet pump |
| SU640197A1 (en) * | 1976-04-05 | 1978-12-30 | Предприятие П/Я В-2120 | Method of detecting cavitation in liquids |
| JPS5653115Y2 (en) * | 1977-08-10 | 1981-12-10 | ||
| 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 |
| DE3639720C1 (en) * | 1986-11-20 | 1993-04-29 | Reinecker Heyko | Pump with canned motor or canned magnetic clutch drive |
| IT1228845B (en) * | 1989-02-22 | 1991-07-05 | Nuovo Pignone Spa | CONTINUOUS CAVITATION DETECTOR-MEASURER IN DYNAMIC PUMPS. |
| GB2263312A (en) * | 1992-01-17 | 1993-07-21 | Stork Pompen | Vertical pump with magnetic coupling. |
| FR2729224A1 (en) * | 1995-01-05 | 1996-07-12 | Debiotech Sa | DEVICE FOR CONTROLLING THE FLOW OF A LIQUID IN A TUBULAR DUCT AND IN PARTICULAR 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 |
| CN1229282C (en) * | 1999-03-15 | 2005-11-30 | 大神设计株式会社 | Method and apparatus for treamtent of organic matter-containing waste water |
| US6447269B1 (en) * | 2000-12-15 | 2002-09-10 | Sota Corporation | Potable water pump |
| US6722854B2 (en) * | 2001-01-24 | 2004-04-20 | Sundyne Corporation | Canned pump with ultrasonic bubble detector |
| US6773670B2 (en) * | 2001-02-09 | 2004-08-10 | Cardiovention, Inc. C/O The Brenner Group, Inc. | Blood filter having a sensor for active gas removal and methods of use |
| JP2002236111A (en) * | 2001-02-09 | 2002-08-23 | Masahiro Nishikawa | Bubble detecting method and device for liquid pump |
| EP1340917B2 (en) * | 2001-06-05 | 2011-08-31 | Iwaki Co., Ltd. | Magnet pump |
| DE10157194A1 (en) * | 2001-11-23 | 2003-06-05 | Wilo Gmbh | Canned tube pump with sensor |
| US6666015B2 (en) * | 2002-01-28 | 2003-12-23 | Hamilton Sundstrand | Simplified fuel control for use with a positive displacement pump |
| US7165949B2 (en) * | 2004-06-03 | 2007-01-23 | Hamilton Sundstrand Corporation | Cavitation noise reduction system for a rotary screw vacuum pump |
| CN2714857Y (en) * | 2004-07-23 | 2005-08-03 | 唐兴民 | Self-priming exhaust magnetic pump |
| DE102004040899A1 (en) * | 2004-08-24 | 2006-03-30 | Schicketanz, Walter, Dr. | Monitoring pumps to detect abnormal operating states, by processing signals from temperature sensors, arranged on pump and triggering countermeasures |
| CN100535816C (en) * | 2005-02-28 | 2009-09-02 | 罗斯蒙德公司 | Process connection for process diagnostics |
| JP4772369B2 (en) * | 2005-04-22 | 2011-09-14 | 京セラミタ株式会社 | Cooling fan fixing device |
| DE202006004483U1 (en) * | 2006-03-22 | 2007-07-26 | Mib Messtechnik & Industrieberatung Gmbh | Measuring device for detection of gases e.g. air, in liquid-conveying transport line, has signal processing unit, which detects and amplifies electrical signal processed by ultrasonic receiver |
| JP2008032020A (en) * | 2007-10-04 | 2008-02-14 | Matsushita Electric Ind Co Ltd | Centrifugal pump |
-
2009
- 2009-07-17 GB GB0912515A patent/GB2471908B/en active Active
- 2009-10-20 US US12/582,127 patent/US20110014072A1/en not_active Abandoned
-
2010
- 2010-05-27 CL CL2010000550A patent/CL2010000550A1/en unknown
- 2010-05-31 ZA ZA2010/03880A patent/ZA201003880B/en unknown
- 2010-06-03 CA CA2706266A patent/CA2706266C/en active Active
- 2010-06-10 JP JP2010132592A patent/JP2011021596A/en active Pending
- 2010-06-11 CO CO10070798A patent/CO6280068A1/en active IP Right Grant
- 2010-06-30 KR KR1020100062407A patent/KR20110007946A/en not_active Application Discontinuation
- 2010-07-06 CN CN2010102309793A patent/CN101956715B/en not_active Expired - Fee Related
- 2010-07-07 DE DE102010026414.8A patent/DE102010026414B4/en not_active Expired - Fee Related
- 2010-07-15 BR BRPI1016226-7A2A patent/BRPI1016226A2/en not_active Application Discontinuation
- 2010-07-15 RU RU2010129213/06A patent/RU2472038C2/en active
- 2010-07-16 AR ARP100102622A patent/AR078074A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2471908B (en) | 2011-11-16 |
| GB2471908A (en) | 2011-01-19 |
| US20110014072A1 (en) | 2011-01-20 |
| DE102010026414A1 (en) | 2011-02-10 |
| CN101956715B (en) | 2013-03-13 |
| BRPI1016226A2 (en) | 2013-12-24 |
| JP2011021596A (en) | 2011-02-03 |
| RU2472038C2 (en) | 2013-01-10 |
| AR078074A1 (en) | 2011-10-12 |
| KR20110007946A (en) | 2011-01-25 |
| DE102010026414B4 (en) | 2014-03-06 |
| RU2010129213A (en) | 2012-01-20 |
| ZA201003880B (en) | 2011-02-23 |
| CN101956715A (en) | 2011-01-26 |
| CO6280068A1 (en) | 2011-05-20 |
| CA2706266A1 (en) | 2011-01-17 |
| GB0912515D0 (en) | 2009-08-26 |
| CL2010000550A1 (en) | 2010-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |