CN1724967A - On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler - Google Patents
On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler Download PDFInfo
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- CN1724967A CN1724967A CN 200510040067 CN200510040067A CN1724967A CN 1724967 A CN1724967 A CN 1724967A CN 200510040067 CN200510040067 CN 200510040067 CN 200510040067 A CN200510040067 A CN 200510040067A CN 1724967 A CN1724967 A CN 1724967A
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- permanent magnet
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Abstract
The invention provides a method and device for on-line monitoring the gap of permanent magnet shaft coupler of a magnetic force pump, able to implement the on-line monitoring of the wearing state of slide bearing of the magnetic force pump, radially arranging at least two groups of detecting leads on the outer surface of an isolating jacket, where each group is composed of several detecting leads, and all the detecting leads are connected in series, generating electromotive force signal by cutting the gap of the permanent magnet shaft coupler, and as the gap is consistent, the sum of the electromotive forces of each group of detecting leads is equal to zero; leading out the detected signals to amplify and filter them, and feeding them to a display for dynamically displaying the gap state of the permanent magnet shaft coupler of the magnetic force pump and simultaneously comparing and judging to send out an alarm signal as reaching the limit valve. The invention can accurately reflect the radial gap between inner and outer rotors of the permanent magnet shaft coupler, reliable, convenient to install and debug, reasonably designed and improving the operating safety and reliability of the magnetic force pump.
Description
Affiliated technical field
The invention belongs to the displacement measurement field.Refer in particular to a kind of method and apparatus to the gap of magnetic force pump permanent magnet coupler on-line monitoring.
Background technology
Magnetic drive pump is a kind of nothing sealing no-leakage pump.It is made up of the pump housing, permanent magnet clutch, drive motor three parts.Motor directly drives the outer rotor of permanent magnet clutch, and the magnetic field of outer rotor upper magnet is passed spacer sleeve and acted on driving pump work on the internal rotor magnet.Spacer sleeve separates pump and power section, has realized leak free power transmission.Because magnetic drive pump adopts enclosed construction, pump slides within bearing relies on the medium of being carried to realize the lubricated and cooling of self, and the medium lubricity that magnetic drive pump is carried is often relatively poor, sliding bearing is often because of the insufficient lubrication serious wear, wearing and tearing back bearing shell increases with the radial play of axle, rotor part rotates loosening, rotor center off-axis geometric center, when sliding bearing abrasion is serious, magnet rotor and seal isolation cover rubs in will causing, if do not find in time that interior magnet rotor can be worn out with sealing shroud, not only cause dielectric leakage, but and fire hazard.
Inside and outside magnet rotor eccentric detection method of Chinese patent 98110180.1,98220956.8 magnetic drive pumps and device, employing is at the radially uniform magnetic test coil in surface, spacer sleeve outer ring, obtain detection signal by magnetic test coil, draw and handle, compare, judge, when reaching spacing value, send alerting signal.Described method of this patent and device have the following disadvantages.1. many signal processing channels of the described magnetic test coil needs of this patent, thereby interference and error are bigger.2. complicated based on the magnetic test coil wiring of flux change design, need lead overlapping, and because the part magnetic flux is cancelled each other, the signal utilization factor is low.3. to organize magnetic test coil independent separately more, and signal lead is increased, and brings interference.
Summary of the invention
The object of the present invention is to provide a kind of on-line monitoring method and apparatus of gap of magnetic force pump permanent magnet coupler, can reflect radial play between the magnetic force pump permanent magnet coupler inner and outer rotors exactly, dependable performance, Installation and Debugging are convenient, reasonable in design can improve security of operation, the reliability of magnetic drive pump.
The technical solution adopted for the present invention to solve the technical problems is:
On-Line Monitor Device of the present invention, it comprises detecting device, working power, signal processing circuit, it is characterized in that: detecting device is for being disposed radially the detection lead that is no less than two groups on surface, spacer sleeve outer ring, the summation of every group of motional electromotive force is that zero detection lead is made up of even number root detection lead, according to permanent magnet clutch magnet number m, detect the apart 360/m degree in lead locus in every group of group, i.e. 180 degree electrical angles; All detect lead and are connected in series successively, constitute detecting device, have only two exits.
When the detection lead is set to two groups, apart 180 degree, the motional electromotive force electrical angle that each group detects lead generation also differs 180 degree.
When above-mentioned detection lead is set to three groups, apart 120 degree, the motional electromotive force electrical angle that each group detects the lead generation also differs 120 degree.
All detect leads and connecting line thereof and adopt flexible film P.e.c. or enameled wire to be fixed in avris or centre position between magnetic drive pump outer steel on the magnetic drive pump spacer sleeve outside surface and the interior magnet steel.
Working power is formed by the generating lead connection rectification, the filtering circuit that are provided with on surface, spacer sleeve outer ring; The generating lead is axially parallel to each other along surface, spacer sleeve outer ring, radially differ the 360/m degree, i.e. 180 degree electrical angles; All generating leads are connected in series, and have only two exits.All generating leads and connecting lines thereof adopt flexible film P.e.c. or enameled wire to be fixed in avris or centre position between magnetic drive pump outer steel on the magnetic drive pump spacer sleeve outside surface and the interior magnet steel.
Described signal processing circuit comprises signal conversion circuit, comparer, warning circuit, display, and wherein comparer, warning circuit connect to form one the tunnel successively, and display is another road, and linking to each other with signal conversion circuit respectively forms.
Its detection method is: by the detector acquisition detection signal, be drawn out to signal conversion circuit, amplify and filtering, and then divide two the tunnel, one the tunnel removes comparison, judgement, warning circuit, send alerting signal when reaching spacing value, the one tunnel send display, dynamically shows the gap of magnetic force pump permanent magnet coupler state.The series connection of generating lead produces the sinusoidal pattern motional electromotive force, provides working power for device behind rectification, filtering circuit.
The invention has the advantages that: can effectively realize causing the online detection of spacer sleeve wearing and tearing, eliminate the major hidden danger that threatens the magnetic drive pump safe operation, the utilization scope of expansion magnetic drive pump because of the Magnetic Drive Pump Sliding Bearing wearing and tearing make the permanent magnet clutch gap smaller.
Description of drawings
Fig. 1 magnetic drive pump structural drawing.
Fig. 2 detects lead and moves in magnetic field and produce the motional electromotive force synoptic diagram.
During Fig. 3 difference error angle, permanent magnet clutch air gap center is the magnetic induction density distribution plan radially.
Fig. 4 embodiment 1 detects the side connecting conductor formula.
Fig. 5 embodiment 1 detects the lead location synoptic diagram.
Fig. 6 embodiment 2 detects the side connecting conductor formula.
Fig. 7 embodiment 2 detects the lead location synoptic diagram.
Fig. 8 embodiment 1 detects lead, generating harness wiring synoptic diagram.
Fig. 9 embodiment 2 detects lead, generating harness wiring synoptic diagram.
Figure 10 embodiment 3 detects lead, generating harness wiring synoptic diagram.
Figure 11 pick-up unit schematic diagram.
1. spacer sleeve, 2. outer rotor, 3. internal rotor, 4. pump slides within bearing 5. detects lead, 6. the generating lead, 7.8.9.10.11.12.13.14.15.16.17.18. detection lead, 19. radial magnetizing N-S permanent magnet, 20. radial magnetizing S-N permanent magnets, 21. power circuits, 22. comparer, 23. warning circuit, 24. signal conversion circuits, 25. displays.
Embodiment
Figure 11 is the pick-up unit schematic diagram, and three groups are detected leads each produces and differs the sinusoidal motional electromotive force signals of 120 degree electrical angles, sends into after the series connection addition that signal conversion circuit 24 amplifies, filtering, send display 25, dynamically shows gap of magnetic force pump permanent magnet coupler.Simultaneously, this signal removes comparer 22, relatively produces alerting signal in the back with fixed voltage, reports to the police when gap of magnetic force pump permanent magnet coupler reaches predetermined gap.The series connection of 5 pairs of generating leads produces the sinusoidal pattern motional electromotive force, provides working power for device after power circuit 21 rectifications, filtering.
Ultimate principle of the present invention as shown in Figure 2, during the permanent magnet clutch rotation, detect lead and on the permanent magnet clutch spacer sleeve, do cutting magnetic line movement, suppose that the magnetic drive pump motor speed is n, the spacer sleeve radius is R, radially magnetic induction density is B, when detecting the effective length of lead for L, electronics in the detection lead is subjected to the effect of Luo Luncili Fm, produce electric field in detecting lead, this electric field is opposite with the Fm direction to electron production again, equal-sized electric field force Fe, and detecting lead two ends generation motional electromotive force, motional electromotive force E size is E=2 π n RBL.When Figure 3 shows that different loads, be that the outer magnet error angle is not simultaneously in the permanent magnet clutch, between the magnetic force pump permanent magnet coupler air gap radially magnetic induction density on surface, spacer sleeve outer ring radially the regularity of distribution be approximately sine function, function cycle is the subtended angle of 2 magnets.Be installed on the spacer sleeve three groups detect that leads produce respectively and permanent magnet clutch between the gap be inversely proportional to, differ the sinusoidal motional electromotive force signals of 120 degree electrical angles, three groups detect vector that the total motional electromotive force of lead is three sinusoidal signals that differ 120 degree electrical angles and.When inside and outside magnet gap equated, total motional electromotive force size was zero.When inside and outside magnet gap did not wait, its difference was big more, and total motional electromotive force is also big more.
The present invention adopts when detecting the lead cutting magnetic field because the effect of Luo Lunci power produces the motional electromotive force principle, three groups are detected the lead series connection and make the signal extension line have only two, signal processing channel has only one, at the detection lead installation site of magnetic force pump permanent magnet coupler magnet number design, make the pick-up unit design more rationally, reliably.
Claims (9)
1. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device, it comprises detecting device, working power, signal processing circuit, it is characterized in that: detecting device is for being disposed radially the detection lead that is no less than two groups on surface, spacer sleeve outer ring, the summation of every group of motional electromotive force is that zero detection lead is made up of even number root detection lead, according to permanent magnet clutch magnet number m, detect the apart 360/m degree in lead locus in every group of group, i.e. 180 degree electrical angles; All detect lead and are connected in series successively, constitute detecting device, have only two exits.
2. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1 is characterized in that: when above-mentioned detection lead is set to two groups, and apart 180 degree, the motional electromotive force electrical angle that each group detects the lead generation also differs 180 degree.
3. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1 is characterized in that: when above-mentioned detection lead is set to three groups, and apart 120 degree, the motional electromotive force electrical angle that each group detects the lead generation also differs 120 degree.
4. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1 is characterized in that: all detect leads and connecting line thereof and adopt flexible film P.e.c. or enameled wire to be fixed in avris or centre position between magnetic drive pump outer steel on the magnetic drive pump spacer sleeve outside surface and the interior magnet steel.
5. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1 is characterized in that: working power is formed by the generating lead connection rectification, the filtering circuit that are provided with on surface, spacer sleeve outer ring; The generating lead is axially parallel to each other along surface, spacer sleeve outer ring, radially differ the 360/m degree, i.e. 180 degree electrical angles; All generating leads are connected in series, and have only two exits.
6. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 5 is characterized in that: all generating leads and connecting lines thereof adopt flexible film P.e.c. or enameled wire to be fixed in avris or centre position between magnetic drive pump outer steel on the magnetic drive pump spacer sleeve outside surface and the interior magnet steel.
7. gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1, it is characterized in that: described signal processing circuit comprises signal conversion circuit, comparer, warning circuit, display, wherein comparer, warning circuit connect to form one the tunnel successively, display is another road, and linking to each other with signal conversion circuit respectively forms.
8. the method for gap of magnetic force pump permanent magnet coupler on-Line Monitor Device according to claim 1, it is characterized in that: by the detector acquisition detection signal, be drawn out to signal conversion circuit, amplify and filtering, and then divide two the tunnel, the one tunnel to remove comparison, judgement, warning circuit, when reaching spacing value, send alerting signal, one the tunnel send display, dynamically shows the gap of magnetic force pump permanent magnet coupler state.
9. gap of magnetic force pump permanent magnet coupler on-line monitoring method according to claim 8 is characterized in that: the series connection of generating lead produces the sinusoidal pattern motional electromotive force, provides working power for device behind rectification, filtering circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100400679A CN100507438C (en) | 2005-05-18 | 2005-05-18 | On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100400679A CN100507438C (en) | 2005-05-18 | 2005-05-18 | On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler |
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| Publication Number | Publication Date |
|---|---|
| CN1724967A true CN1724967A (en) | 2006-01-25 |
| CN100507438C CN100507438C (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100400679A Expired - Fee Related CN100507438C (en) | 2005-05-18 | 2005-05-18 | On-line monitoring method and device for gap of magnetic force pump permanent magnet coupler |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430188B (en) * | 2008-11-04 | 2010-06-09 | 江苏大学 | On-line monitoring device and method for rotating shaft position of magnetic pump |
| CN101539395B (en) * | 2009-04-24 | 2011-07-06 | 江苏大学 | Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler |
| CN102384077A (en) * | 2010-08-31 | 2012-03-21 | 杨燕 | Protecting device for dry friction and overload of magnetic pump, slipping of coupler and clamping and grinding of rotor |
| CN103925229A (en) * | 2014-04-16 | 2014-07-16 | 江苏大学 | Magnetic coupler monitoring abrasion to magnetic pump bearing |
| CN107964926A (en) * | 2017-12-29 | 2018-04-27 | 江苏扬州富达液压机械集团有限公司 | A kind of lower shaft multi-angle locking device of steel dam anchor gate |
| CN108759650A (en) * | 2018-04-23 | 2018-11-06 | 江苏大学镇江流体工程装备技术研究院 | A kind of magnetic drive pump bearing gap wear on-Line Monitor Device and its method |
| CN113447265A (en) * | 2020-03-25 | 2021-09-28 | 弗兰德有限公司 | Coupling and method for contactless detection of wear of a coupling |
-
2005
- 2005-05-18 CN CNB2005100400679A patent/CN100507438C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430188B (en) * | 2008-11-04 | 2010-06-09 | 江苏大学 | On-line monitoring device and method for rotating shaft position of magnetic pump |
| CN101539395B (en) * | 2009-04-24 | 2011-07-06 | 江苏大学 | Device for online-monitoring of internal-external magnetic steel gap of a magnetic pump permanent coupler |
| CN102384077A (en) * | 2010-08-31 | 2012-03-21 | 杨燕 | Protecting device for dry friction and overload of magnetic pump, slipping of coupler and clamping and grinding of rotor |
| CN102384077B (en) * | 2010-08-31 | 2015-08-05 | 江苏大学 | Magnetic drive pump dry friction, overload, coupling slippage, rotor card mill protective gear |
| CN103925229A (en) * | 2014-04-16 | 2014-07-16 | 江苏大学 | Magnetic coupler monitoring abrasion to magnetic pump bearing |
| CN103925229B (en) * | 2014-04-16 | 2016-01-27 | 江苏大学 | A kind of magnetic coupling of monitoring magnetic drive pump bearing wearing and tearing |
| CN107964926A (en) * | 2017-12-29 | 2018-04-27 | 江苏扬州富达液压机械集团有限公司 | A kind of lower shaft multi-angle locking device of steel dam anchor gate |
| CN108759650A (en) * | 2018-04-23 | 2018-11-06 | 江苏大学镇江流体工程装备技术研究院 | A kind of magnetic drive pump bearing gap wear on-Line Monitor Device and its method |
| CN108759650B (en) * | 2018-04-23 | 2020-11-03 | 江苏大学镇江流体工程装备技术研究院 | Magnetic pump bearing gap wear online monitoring device and method thereof |
| CN113447265A (en) * | 2020-03-25 | 2021-09-28 | 弗兰德有限公司 | Coupling and method for contactless detection of wear of a coupling |
| CN113447265B (en) * | 2020-03-25 | 2023-11-28 | 弗兰德有限公司 | Coupling and method for contactless detection of coupling wear |
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| Publication number | Publication date |
|---|---|
| CN100507438C (en) | 2009-07-01 |
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Granted publication date: 20090701 Termination date: 20110518 |