CN104329282B - A kind of electromagnetic lifting glandless motor pump and start-stop method thereof - Google Patents
A kind of electromagnetic lifting glandless motor pump and start-stop method thereof Download PDFInfo
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- CN104329282B CN104329282B CN201410595790.2A CN201410595790A CN104329282B CN 104329282 B CN104329282 B CN 104329282B CN 201410595790 A CN201410595790 A CN 201410595790A CN 104329282 B CN104329282 B CN 104329282B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 54
- 239000010439 graphite Substances 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 25
- 230000001050 lubricating effect Effects 0.000 abstract description 18
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 230000000284 resting effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010016256 fatigue Diseases 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000001314 paroxysmal effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 241000283074 Equus asinus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- 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
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- 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
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0686—Mechanical details of the pump control unit
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The present invention relates to a kind of electromagnetic lifting glandless motor pump and start-stop method thereof, including canned pump body, thrust disc, upper graphite bearing shell, lower graphite bearing shell, thrust disc, lower graphite bearing shell and upper graphite bearing shell constitute friction pair, canned pump has the armature being connected with rotor coaxial, the magnet exciting coil also including being fixed on canned pump and matching with armature, magnet exciting coil is connected with DC source by coil lead.The magnetic adsorbability that magnet exciting coil produces is utilized to carry out lift armature; armature drives the mode of canned pump rotor; reduce and even eliminate lower frictional force between graphite bearing shell and thrust disc; reduce the abrasion even eliminated therebetween; also can connect emergency battery when Coolant Pump power-off and enable electromagnetic force lifting device; rotor is made to be in suspended state; when avoiding shutting down water lubricating thrust bearing because of rotating speed decline, water film thickness disappears and causes that boundary friction resistance increases and hinder rotor running down, thus half flow coasting time of Extending Rotor improve the safety of reactor.
Description
Technical field
The present invention relates to starting and stopping mechanism in reactor system glandless motor pump, specifically a kind of electromagnetic lifting glandless motor pump and start-stop method thereof.
Background technology
The vertical glandless motor pump that nuclear-energy plant reactor adopts (includes canned motor pump, wet stator pumps etc.) there is simple in construction, the advantages such as zero leakage, it is mainly used in reactor-loop system main pump and donkey pump, but water lubricating thrust bearing is as glandless motor pump critical component, owing to adopting the principle design of sliding friction carrying, exist easy to wear simultaneously, restricted lifetime, the feature that reliability is relatively low, if considered by nuclear power plant's longevity end-of-term examination in 60 year, period needs repeatedly replacing water lubricating thrust bearing friction pair, thus shutdown maintenance and replacing bearing friction adjutant produce bigger Financial cost.The operation time safe and reliable within the phase in reactor longevity in order to extend glandless motor pump; need the heavy wear situation avoiding or reducing water lubricating thrust bearing friction pair in starting and the existence in the stage of shutdown; in order to avoid thrust bearing causes the faults such as thrust bearing inefficacy or card rotor in long-term starting and shutdown step transition abrasion, thus causing great loss.
Existing glandless motor pump water lubricating thrust bearing friction pair in use wear extent is relatively big, needs to be replaced, cause bigger loss after reaching certain wear extent, and extending its service life is technical barrier urgently to be resolved hurrily in this area.
Summary of the invention
It is an object of the invention to provide and be applied to a kind of electromagnetic lifting glandless motor pump and start-stop method thereof; the heavy wear problem overcoming current water lubricating thrust bearing to occur in the start/stop machine stage, reaches the purpose of service life and the reliability extending water lubricating thrust bearing.
The purpose of the present invention is achieved through the following technical solutions:
A kind of electromagnetic lifting glandless motor pump, including canned pump body, the rotor of canned pump body is provided with thrust disc, also include being fixed on outside rotor and being positioned at the upper graphite bearing shell below thrust disc and be fixed on outside rotor and be positioned at the upper graphite bearing shell above thrust disc, thrust disc, lower graphite bearing shell and upper graphite bearing shell constitute friction pair, described canned pump is provided with the armature being connected with rotor coaxial, the magnet exciting coil also including being fixed on canned pump and match with armature, magnet exciting coil is connected with DC source by coil lead.nullIn actual use procedure，Applicants have discovered that the rule of abrasion: when glandless motor pump normal rating rotating speed and constant axial load F，Water lubricating thrust bearing generally can form enough carrying water film thicknesses when being in steady running condition between the thrust disc and the static lower graphite bearing shell that rotate，With ensure pump when long-term stability is run between thrust disc and lower graphite bearing shell almost without boundary friction and contact wear，Therefore water lubricating thrust bearing produces heavy wear and only occurs in starting and shutdown stage，Time now due to starting, rotating speed is transitioned into rated speed from zero、During shutdown rotating speed from rated speed be transitioned into zero time，Thrust disc is relatively low thus enough hydrodynamic carrying water film thicknesses can not be formed between the rubbing surface of lower graphite bearing shell due to rotating speed，Thus cause that thrust bearing heavy wear appears in the start-stop stage；nullAfter finding this rule，Applicant is studied in detail according to this rule and tests，Propose technical scheme: adopt and a magnet exciting coil is set on canned pump，One armature is installed in canned pump，The magnetic adsorbability that magnet exciting coil produces is utilized to carry out lift armature，Armature drives the mode of canned pump rotor，Reduce and even eliminate lower friction force between graphite bearing shell and thrust disc，Reduce and even eliminate lower fretting wear between graphite bearing shell and thrust disc，Thus extending the service life of canned pump，Extend the interval time of bearing replacing，Even can accomplish theoretic never wornout，The paroxysmal shutdown etc. caused because of bearing fault is avoided to lose，Electromagnetic force lifting device can also be enabled when Coolant Pump power-off by connection emergency battery simultaneously，Whole rotor is made to be in suspended state，When avoiding shutting down, water lubricating thrust bearing is because of rotating speed decline、Water film thickness disappears and causes that boundary friction resistance increases obstruction rotor running down，Thus half flow coasting time of Extending Rotor improve the safety of reactor.
This structure also includes a thrust ball bearing, and described rotor is connected on the upper disk of thrust ball bearing, and described armature is connected on the lower disc of thrust ball bearing.nullThe solution of the present invention has been carried out amendment further by applicant: by arranging a thrust ball bearing，Armature is connected with the lower disc of thrust ball bearing、The upper end of the annular groove position on rotor top is connected with the upper disk of thrust ball bearing，Owing to thrust ball bearing have employed the bearing principle of balls tumble friction between upper lower disc，Have light、Flexibly、Frictional resistance feature that is little and that do not limited by the relative rotation speed change between upper lower disc，Therefore can produce neatly to rotate against by the rotation of ball ball between upper disk and the lower disc of thrust ball bearing，The action of a magnetic field will be produced when magnet exciting coil connects DC source by binding post，Upwards attract armature thus to promote rotor and thrust disc shifts up，The size of displacement is by the restriction of upper graphite bearing shell，Being sized to of lifting force is a bit larger tham axial load F，To guarantee that thrust disc does not contact with lower graphite bearing shell、And enable whole rotor to be nearly in suspended state.
As a further improvement on the present invention, for the position of stable rotor, the inner surface at described canned pump body is provided with lead, is provided with the gathering sill matched with lead on armature.Offer the mode of longitudinally guiding groove at the cylindrical connecting portion of armature by arranging lead correspondence; make when rotor operate on the one hand armature not produce to rotate and easily upper and lower displacement, another aspect will be it can be avoided that the rotation of armature will be cut the magnetic field of magnet exciting coil and be caused rotary resistance and the internal vortex loss of rotor; after allowing glandless motor pump rotating speed be transitioned into rated speed or stopped status by above-mentioned principle, then cut off the direct current supply of magnet exciting coil and make armature be in deadweight resting state；This glandless motor pump electromagnetism start-stop lifting device is simple and reasonable for structure; the heavy wear situation that is possible not only to directly to avoid or reduce water lubricating thrust bearing to occur in the reactor system glandless motor pump start-stop stage, extend thrust bearing service life; also it is avoided that being applied to when the unexpected power-off of main pump is shut down water lubricating thrust bearing disappears, produces bigger boundary friction resistance and hinder rotor running down because of carrying moisture film simultaneously, thus half flow coasting time of Extending Rotor improve the safety of reactor system power-off.
Described armature and rotor are bolted to connection.Some the application starting torque such as motor is sufficiently large, disregard excitation limit circle energising time rotor rotate and cut resistance that its magnetic line of force produces and armature internal vortex loss affects, when needing to extend the demand such as running down when being left out being applied to main pump simultaneously, it is possible to adopt armature and rotor be fix be connected and with the glandless motor pump start-stop lifting device structure of rotor synchronous axial system.
1.01～1.05 times that captivation is canned pump axial load F produced after the energising of described magnet exciting coil 5, enable rotor just at suspended state.
The start-stop method of a kind of electromagnetic lifting glandless motor pump, comprises the following steps:
A () set up procedure: first before canned pump runs, magnet exciting coil is connected DC source by binding post and is produced magnetic attraction, attracts armature to move upward so that thrust disc departs from lower graphite bearing shell；Then start canned pump, when after canned pump operating to rated speed, cut off the power supply of magnet exciting coil, complete to start；
B () stops step: first before canned pump stops, and magnet exciting coil is connected DC source by binding post and produced magnetic attraction, the state attracting armature upwards and keeping thrust disc to depart from lower graphite bearing shell；Then canned pump is shut down, and after the rotating speed of canned pump drops to zero from rated value, cuts off the power supply of magnet exciting coil, completes to shut down.
Another object of the present invention is to provide a kind of new control method; the method of this control canned pump start-stop adopts magnetic adsorbability as keeping the mode that rotor is unsettled, suspend; avoid contacting and friction between rotor with lower graphite bearing shell; solve the problem that graphite bearing bush abrasion is bigger under the start-stop stage; make can realize in theory the lossless work of graphite bearing shell; substantially increase the service life of canned pump, decrease the loss because shutdown brings.
The present invention compared with prior art, has such advantages as and beneficial effect:
null1 a kind of electromagnetic lifting glandless motor pump provided by the invention and start-stop method thereof，Adopt and a magnet exciting coil is set on canned pump，Canned pump internal rotor is installed an armature，The magnetic adsorbability that magnet exciting coil produces is utilized to carry out lift armature，Armature drives the mode of canned pump rotor，Reduce and even eliminate lower active force between graphite bearing shell and thrust disc，Reduce and even eliminate lower friction between graphite bearing shell and thrust disc，Thus extending the service life of canned pump，Extend the interval time changed，Even can sit on theoretic never wornout，The paroxysmal shutdown etc. caused because of bearing fault is avoided to lose，Electromagnetic force lifting device can also be enabled when Coolant Pump power-off by connection emergency battery simultaneously，Whole rotor is made to be in suspended state，When avoiding shutting down, water lubricating thrust bearing is because of rotating speed decline、Water film thickness disappears and causes that boundary friction resistance increases obstruction rotor running down，Thus half flow coasting time of Extending Rotor improve the safety of reactor power-off；
null2 a kind of electromagnetic lifting glandless motor pump provided by the invention and start-stop method thereof，By arranging a thrust ball bearing，Armature is connected with the lower disc of thrust ball bearing、The upper end of the annular groove position on rotor top is connected with the upper disk of thrust ball bearing，Owing to thrust ball bearing have employed the bearing principle of balls tumble friction between upper lower disc，Have light、Flexibly、Frictional resistance feature that is little and that do not limited by the relative rotation speed change between upper lower disc，Therefore can produce neatly to rotate against by the rotation of ball ball between upper disk and the lower disc of thrust ball bearing，The action of a magnetic field will be produced when magnet exciting coil connects DC source by binding post，Upwards attract armature thus to promote rotor and thrust disc shifts up，The size of displacement is by the restriction of upper graphite bearing shell，Being sized to of lifting force is a bit larger tham axial load F，With guarantee thrust disc be in not with lower graphite bearing shell contact condition，Thus accomplishing that enabling whole rotor to suspend starts or shut down；
3 a kind of electromagnetic lifting glandless motor pump provided by the invention and start-stop method thereof; armature can be made when rotor operate on the one hand not produce to rotate and easily upper and lower displacement, another aspect will be it can be avoided that the rotation of armature will be cut the magnetic field of magnet exciting coil and be caused rotary resistance and the internal vortex loss of rotor; after allowing glandless motor pump rotating speed be transitioned into rated speed or stopped status by above-mentioned principle, then cut off the direct current supply of magnet exciting coil and make armature be in deadweight resting state；This glandless motor pump electromagnetism start-stop lifting device is simple and reasonable for structure, it is possible to improve the service efficiency of glandless motor pump further.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one structural representation；
Fig. 2 is the embodiment of the present invention two structural representation.
Labelling and corresponding parts title in accompanying drawing:
1 thrust disc, 2 times graphite bearing shells, graphite bearing shell on 3,4 thrust ball bearings, 5 inductance type transducers, 6 binding posts, 7 armature, 8 leads, 9 rotors.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment one
nullSchematic diagram as shown in Figure 1，A kind of electromagnetic lifting glandless motor pump，Including canned pump body、Water lubricating thrust bearing friction pair、Magnet exciting coil 5、Armature 7、Rotor 9、Thrust ball bearing 4，Graphite bearing shell 2 under 8 pieces of sectors that water lubricating thrust bearing friction pair is mainly circular layout by discoid thrust disc 1 and axial symmetry、Upper graphite bearing shell 3 forms，Wherein thrust disc 1 is connected for rigidly fixing with rotor 9，During resting state, thrust disc 1 is seated on lower graphite bearing shell 2、And and upper graphite bearing shell 3 between maintain the gap of 2mm，When glandless motor pump runs, thrust disc 1 and rotor 9 will rotate continuously around axle center、Lower graphite bearing shell 2 and upper graphite bearing shell 3 keep geo-stationary，Owing to the axial load F of thrust bearing is acted on lower graphite bearing shell 2 by thrust disc 1 and kept down，Thrust disc 1 in usual bearing friction pair contacts with lower graphite bearing shell 2 with shutting down the luck change of team in starting，Cause that lower graphite bearing shell 2 wear extent is by cumulative rises；Magnet exciting coil 5 annular is embedded on pump top cover, and be connected with DC source by binding post 6, the armature 7 that permeability magnetic material makes is connected with the lower disc of thrust ball bearing 4, the upper end of annular groove position on rotor top is connected with the upper disk of thrust ball bearing 4, can produce neatly to rotate against by the rotation of ball ball between upper disk and the lower disc of thrust ball bearing, arranging lead 8 correspondence on the top of pump offers longitudinally guiding groove at the cylindrical connecting portion of armature 7 simultaneously, makes armature 7 not produce to rotate and easily upper and lower displacement.
Start-stop method: before glandless motor pump brings into operation, upwards attract armature 7 thus to promote rotor generation electromagnetic force when magnet exciting coil 5 connects DC source by binding post 6 and thrust disc shifts up, the size of displacement is limited by upper graphite bearing shell 3, lifting force is sized to 1.05 times of axial load F, to guarantee that rotor 9 and thrust disc 1 can be nearly in suspended state, then start glandless motor pump to operate to rated speed, by after the carrying water film thickness of formation expected design between the friction surface between thrust disc 1 and the lower graphite bearing shell 2 of water lubricating thrust bearing, magnet exciting coil 5 just power-off stops electromagnetic force castering action, and make armature 7 be in deadweight resting state；Moment before glandless motor pump is shut down; to produce electromagnetic force when magnet exciting coil 5 connects DC source by binding post 6 equally upwards attracts armature 7 thus to promote rotor and thrust disc upwards a small amount of displacement; 1.05 times that are dimensioned to axial load F of lifting force; to guarantee that rotor and thrust disc can be nearly in suspension rotary state; then glandless motor pump shut down rotating speed will from rated speed be down to zero time, magnet exciting coil 5 just power-off stops electromagnetic force castering action.
Embodiment two
Schematic diagram as shown in Figure 2, a kind of electromagnetic lifting glandless motor pump, including canned pump body, magnet exciting coil 5, armature 7, rotor 9；Graphite bearing shell 2 under 8 pieces of sectors that water lubricating thrust bearing friction pair is mainly circular layout by discoid thrust disc 1 and axial symmetry, upper graphite bearing shell 3 forms, wherein thrust disc 1 is connected for rigidly fixing with rotor 9, during resting state, thrust disc 1 is seated on lower graphite bearing shell 2, and and upper graphite bearing shell 3 between maintain the gap of 2mm, when glandless motor pump runs, thrust disc 1 and rotor 9 will rotate continuously around axle center, top and lower graphite bearing shell keep geo-stationary, owing to the axial load F of thrust bearing is acted on lower graphite bearing shell 2 by thrust disc 1 and kept down, thrust disc in usual bearing friction pair contacts with lower graphite bearing shell 2 with shutting down the luck change of team in starting, cause that lower graphite bearing shell 2 wear extent is by cumulative rises.Magnet exciting coil 5 annular is embedded on pump top cover, and is connected with DC source by binding post 6, permeability magnetic material the armature 7 made fix with rotor 9 be connected and with rotor synchronous axial system.
Start-stop method: before glandless motor pump brings into operation, upwards attract armature 7 thus to promote rotor generation electromagnetic force when magnet exciting coil 5 connects DC source by binding post 6 and thrust disc shifts up, the size of displacement is limited by upper graphite bearing shell 3, lifting force is sized to 1.05 times of axial load F, to guarantee that rotor 9 and thrust disc 1 can be nearly in suspended state, then start glandless motor pump to operate to rated speed, by after the carrying water film thickness of formation expected design between the friction surface between thrust disc 1 and the lower graphite bearing shell 2 of water lubricating thrust bearing, magnet exciting coil 5 just power-off stops electromagnetic force castering action, armature 7 is in and rotor synchronous axial system state in this process；Moment before glandless motor pump is shut down; to produce electromagnetic force when magnet exciting coil 5 connects DC source by binding post 6 equally upwards attracts armature 7 thus to promote rotor and thrust disc upwards a small amount of displacement; 1.05 times that are dimensioned to axial load F of lifting force; to guarantee that rotor and thrust disc can be nearly in suspension rotary state; then glandless motor pump shut down rotating speed will from rated speed be down to zero time, magnet exciting coil 5 just power-off stops electromagnetic force castering action.
The above, be only presently preferred embodiments of the present invention, the present invention not does any pro forma restriction, any simple modification that above example is made by every technical spirit according to the present invention, equivalent variations, each falls within protection scope of the present invention.
Claims (6)
1. an electromagnetic lifting glandless motor pump, including canned pump body, the rotor (9) of canned pump body is provided with thrust disc (1), also include being fixed on rotor (9) outside and being positioned at the lower graphite bearing shell (2) of thrust disc (1) lower section, and be fixed on rotor (9) outside and be positioned at the upper graphite bearing shell (3) of thrust disc (1) top, thrust disc (1), lower graphite bearing shell (2), and upper graphite bearing shell (3) constitutes friction pair, it is characterized in that: on described canned pump, be provided with an armature (7) coaxially connected with rotor (9), the magnet exciting coil (5) also including being fixed on canned pump and match with armature (7), magnet exciting coil (5) is connected with DC source by coil lead (6).
2. a kind of electromagnetic lifting glandless motor pump according to claim 1, it is characterized in that: also include a thrust ball bearing (4), described rotor (9) is connected on the upper disk of thrust ball bearing (4), and described armature (7) is connected on the lower disc of thrust ball bearing (4).
3. a kind of electromagnetic lifting glandless motor pump according to claim 2, it is characterised in that: the inner surface at described canned pump body is provided with lead (8), is provided with the gathering sill matched with lead (8) on armature (7).
4. a kind of electromagnetic lifting glandless motor pump according to claim 1, it is characterised in that: described armature (7) and rotor (9) are bolted to connection.
5. a kind of electromagnetic lifting glandless motor pump as claimed in any of claims 1 to 4, it is characterised in that: 1.01～1.05 times that captivation is canned pump axial load F produced after described magnet exciting coil (5) energising.
6. the start-stop method of an electromagnetic lifting glandless motor pump, it is characterised in that comprise the following steps:
A () set up procedure: first before canned pump runs, magnet exciting coil (5) is connected DC source by binding post (6) and is produced magnetic attraction, attracts armature (7) to move upward so that thrust disc (1) departs from lower graphite bearing shell (2)；Then start canned pump, when after canned pump operating to rated speed, cut off the power supply of magnet exciting coil (5), complete to start；
B () stops step: first before canned pump stops, and magnet exciting coil (5) is connected DC source by binding post (6) and produced magnetic attraction, the state attracting armature (7) upwards and keeping thrust disc (1) and lower graphite bearing shell (2) to depart from；Then canned pump is shut down, and after the rotating speed of canned pump drops to zero from rated value, cuts off the power supply of magnet exciting coil (5), completes to shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595790.2A CN104329282B (en) | 2014-10-30 | 2014-10-30 | A kind of electromagnetic lifting glandless motor pump and start-stop method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410595790.2A CN104329282B (en) | 2014-10-30 | 2014-10-30 | A kind of electromagnetic lifting glandless motor pump and start-stop method thereof |
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| CN104329282A CN104329282A (en) | 2015-02-04 |
| CN104329282B true CN104329282B (en) | 2016-07-20 |
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| CN109672292A (en) * | 2018-12-27 | 2019-04-23 | 佛山市三角洲电器科技有限公司 | A kind of roller end positioning formula motor and its localization method |
| CN110792626A (en) * | 2019-11-01 | 2020-02-14 | 山东核电有限公司 | Nuclear main pump with electromagnetic axial force balancing device |
| CN116945012B (en) * | 2023-09-04 | 2024-03-26 | 西可装备制造(衡阳)有限公司 | Polishing equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3305174A1 (en) * | 1983-02-15 | 1984-09-06 | Hermann 7800 Freiburg Krämer | Centrifugal pump with canned magnetic clutch drive |
| US7626295B2 (en) * | 2005-11-01 | 2009-12-01 | Tokyo Parts Industrial Co., Ltd | Flat eccentric rotor equipped with a fan and flat vibration motor equipped with a fan comprising same rotor |
| CN201818502U (en) * | 2010-04-19 | 2011-05-04 | 江苏国泉泵业制造有限公司 | Multistage centrifugal pump with thrust bearing assembly |
| CN202597179U (en) * | 2011-12-29 | 2012-12-12 | 檀甲友 | Pump shaft and water pump provided with the pump shaft |
| CN202946431U (en) * | 2012-07-16 | 2013-05-22 | 晋州市水泵厂 | Automatic center-adjusting thrust bearing used for immersible pump |
| CN204175626U (en) * | 2014-10-30 | 2015-02-25 | 中国核动力研究设计院 | A kind of electromagnetic lifting glandless motor pump |
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