CN106124110B - Axial permanent magnetic suspension bearing mgnetic observations device - Google Patents
Axial permanent magnetic suspension bearing mgnetic observations device Download PDFInfo
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- CN106124110B CN106124110B CN201610639274.4A CN201610639274A CN106124110B CN 106124110 B CN106124110 B CN 106124110B CN 201610639274 A CN201610639274 A CN 201610639274A CN 106124110 B CN106124110 B CN 106124110B
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- Prior art keywords
- sunk screw
- ring
- inner sleeve
- pressure sensor
- threaded rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0009—Force sensors associated with a bearing
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of axial permanent magnetic suspension bearing mgnetic observations devices, including threaded rod, the first sunk screw, pressure sensor, upper plate, the second sunk screw, upper outer sleeve, lower inner sleeve, magnetostatic ring, dynamic magnet ring, third sunk screw, card rod, lower plate, lower outer sleeve, washer, nut, pressure display unit.The card rod is filled in the cylindrical hole of threaded rod lower end, for limiting bottom Board position；The lower inner sleeve is fixed by sunk screw and lower plate；The upper outer sleeve is fixed by sunk screw and upper plate；The pressure sensor is fixed by sunk screw and upper plate；The pressure display unit is connected through a screw thread with pressure sensor；Described two magnet rings should be noted that magnetizing direction is opposite when installing；The nut is screwed down from threaded rod upper end.Whole device is easy to operate, and cost is relatively low, general to mutually isostructural axial permanent magnetic suspension bearing.
Description
Technical field
The present invention relates to a kind of axial permanent magnetic suspension bearing mgnetic observations devices.
Background technique
So that object is in contactless suspended state using magnetic force is one ancient dream of the mankind.It is mentioned from what magnetic bearing was imagined
Out, it experienced a very long development process to its theory study, experimental study and practical application, had for more than 170 years so far
History.The developing history of external magnetic bearing experienced three developing stage, the first stage: the basic theory exploratory stage；Second-order
Section: research and development and technology implementation phase；Phase III: the stage is promoted and applied.
The country starts late to the research work of magnetic bearing, but has also carried out a large amount of research.1981, Shanghai micro machine
Research institute has developed China's First suspension magnetic bearing model machine entirely using the hybrid magnetic suspension of radial passive, axial active, this
A little research achievements are worth without practical application in industry substantially since model is simple, rigidity is small, load is low.Nineteen eighty-two, Tsinghua University
Zhang Zuming, Wen Shi cast the single-degree-of-freedom magnetic suspension of small ball and carried out theory analysis and experimental study.1988, Harbin
Polytechnical university proposes magnetic bearing Optimal Structure Designing theory and method, establishes active magnetic bearings machine tool chief axis control system number
Model is learned, this is that domestic suspension machine tool chief axis from structure to control carries out system research entirely to active magnetic bearings for the first time.Then, western
Peace university of communications's bearing studies the stable suspersion that five freedom degree electromagnetic bearings of simulation control are realized in the country one belongs to, highest
Revolving speed is 30000r/min.On the basis of Xi'an Communications University's research achievement, Shanghai University developed electromagnetic axis in 1998
Controller (600W) is held for 150m3The control of oxygen turbine expansion model machine processed, and be succeeded in laboratory.
Passive magnetic bearing fully relies on permanent magnetic caused by permanent magnet itself or conduction magnetic force to realize shaft in portion
Divide the stable suspersion in freedom degree.Compared to active magnetic bearings, passive magnetic bearing has itself unique advantage, it is without actively
Electronic control system, therefore have the series of advantages such as small in size, low in energy consumption, structure is simple.At present, in passive magnetic axis
In holding, using it is most be the Permanent-magnet bearing being made of permanent magnet.Permanent-magnet bearing can be by axially or radially magnetized magnet ring structure
At rigidity and bearing capacity can then increase by using magnet ring stacking and the method for appropriate structure design.
Axial permanent magnetic suspension bearing is one kind of passive magnetic bearing, in order to preferably design axial permanent magnetic bearing, it is desirable that must
The stress condition of axial permanent magnetic bearing must be calculated, and by testing come proof theory calculated result.And axial permanent magnetic levitation axis
The stress held mainly can be regarded as the stress between two permanent-magnetic clamps.
Now with the overall background of social development --- energy conservation and environmental protection, low-carbon economy, and Active Magnetic Suspending Bearing due to
It involves great expense, then demand of the producer to passive magnetic suspension bearing is higher and higher, in order to research and develop the good product of manufacture, designs
A kind of general axial permanent magnetic suspension bearing mgnetic observations device just seems particularly necessary.
Summary of the invention
It is an object of the invention to aiming at the defects existing in the prior art, provide a kind of axial permanent magnetic suspension bearing magnetic force survey
Measure device.Whole device, easy to operate, price material benefit are general to mutually isostructural axial permanent magnetic suspension bearing.
In order to achieve the above objectives, insight of the invention is that
The present invention designs a kind of axial permanent magnetic suspension bearing mgnetic observations device, it is by tightening the spiral shell of threaded rod upper end
Mother moves down the part for being suspended in threaded rod top half integrally, measures the distance between two magnet rings, record by clearance gauge
The numerical value of nut lower end pressure sensor, with the distance value that the distance between original magnet ring subtracts measurement just obtain it is mobile away from
From the numerical value corresponding record of the distance moved every time and pressure sensor being got off, then be fitted to curve.
Conceived according to foregoing invention, the present invention adopts the following technical scheme:
A kind of axial permanent magnetic suspension bearing mgnetic observations device, including threaded rod, the first sunk screw, pressure sensor,
Upper plate, the second sunk screw, upper outer sleeve, lower inner sleeve, magnetostatic ring, dynamic magnet ring, third sunk screw, card rod, lower plate,
Lower outer sleeve, washer, nut, pressure display unit；The lower inner sleeve is fixed on lower plate by third sunk screw, described
Lower outer sleeve covers on lower inner sleeve, and bottom is contacted with lower plate, and the dynamic magnet ring covers on lower inner sleeve, the magnetostatic ring
Also it covers on lower inner sleeve, the magnetizing direction of magnetostatic ring and dynamic magnet ring is opposite and there are gaps；The upper outer sleeve upper end passes through
Second sunk screw is fixed on the downside of upper plate, and lower end is in contact with magnetostatic ring, and the pressure sensor passes through the first countersunk head
Screw is fixed on the upside of upper plate, and the threaded rod passes through the centre of device, and lower end cylindrical hole stretches out lower plate, institute
It states card rod to fill in the cylindrical hole of threaded rod lower end, for limiting lower plate axial position, pad is first installed in the upper end of pressure sensor
Circle, then nut is screwed down from threaded rod upper end, play the role of spiral load；The pressure display unit and pressure sensor
Connection.
The outer diameter of the lower inner sleeve is equal to the internal diameter of magnetostatic ring and dynamic magnet ring, so that two magnet rings are concentric, i.e. two magnetic
Ring is radially fixed, can axially move along lower inner sleeve.
The present invention compared with prior art, has substantive features following prominent and marked improvement:
The present invention measures the distance between two magnet rings by clearance gauge, more economical relative to using position sensor；And it surveys
Magnitude is in contrast also very accurate, operates also very convenient.Apply pressure by tightening for nut, easy to operate, pressure sensing
Using for device makes the magnetic force value of measurement more acurrate.Whole device can change the internal-and external diameter of sleeve, allow to measure difference
The magnetic force of size magnet ring.According to the theoretical calculation numerical value of magnetic force between magnet ring, the pressure sensor of different ranges can be selected.
Detailed description of the invention
Fig. 1 is axial permanent magnetic suspension bearing mgnetic observations device half sectional view.
Fig. 2 is axial permanent magnetic suspension bearing mgnetic observations apparatus structure schematic diagram.
Fig. 3 is clearance gauge structural schematic diagram.
Structure diagram when Fig. 4 is the load of axial permanent magnetic suspension bearing mgnetic observations device.
Fig. 5 is pressure sensor structure figure.
Specific embodiment
This with reference to the accompanying drawing further describes the present invention with specific implementation:
As shown in Figure 1, Figure 2, Figure 5, a kind of axial permanent magnetic suspension bearing mgnetic observations device, including threaded rod 1, first are heavy
Head screw 2, pressure sensor 3, upper plate 4, the second sunk screw 5, upper outer sleeve 6, lower inner sleeve 7, magnetostatic ring 8, dynamic magnet ring
9, third sunk screw 10, card rod 11, lower plate 12, lower outer sleeve 13, washer 14, nut 15, pressure display unit 16；Under described
Inner sleeve 7 is fixed on lower plate 12 by third sunk screw 10, and 13 sets of the lower outer sleeve is on lower inner sleeve 7, bottom
Portion is contacted with lower plate 12, and on lower inner sleeve 7, the magnetostatic ring 8 also covers on lower inner sleeve 79 sets of the dynamic magnet ring, magnetostatic
The magnetizing direction of ring 8 and dynamic magnet ring 9 is opposite and there are gaps；6 upper end of upper outer sleeve is fixed on by the second sunk screw 5
The downside of upper plate 4, lower end are in contact with magnetostatic ring 8, and the pressure sensor 3 is fixed on top by the first sunk screw 2
The upside of plate 4, the threaded rod 1 pass through the centre of device, and lower end cylindrical hole stretches out lower plate 12, and the card rod 11 is filled in
Enter in 1 lower end cylindrical hole of threaded rod, for limiting 12 axial position of lower plate, the upper end elder generation mounting gasket 14 of pressure sensor 3,
Nut 15 is screwed down from 1 upper end of threaded rod again, plays the role of spiral load；The pressure display unit 16 and pressure sensing
Device 3 connects.
The outer diameter of the lower inner sleeve 7 is equal to the internal diameter of magnetostatic ring 8 and dynamic magnet ring 9, so that two magnet rings are concentric, i.e., two
Magnet ring is radially fixed, can axially move along lower inner sleeve 7.
The installation process of apparatus of the present invention is as follows:
Firstly, carrying out the installation of dynamic magnet ring 9.Lower inner sleeve 7 is fixed on lower plate 12 by third sunk screw 10,
The outer diameter of lower inner sleeve 7 is equal to the internal diameter of dynamic magnet ring 9, and such effect is to limit the displacement of magnet ring radially；By lower housing
13 sets of cylinder is on lower inner sleeve 7, and bottom is contacted with lower plate 12, and dynamic magnet ring 9 also covers on lower inner sleeve 7, and with
Lower outer sleeve 13 contacts, and such effect is that dynamic magnet ring 9 is avoided directly to contact with lower plate 12, reduces loss.
Secondly, carrying out the installation of magnetostatic ring 8.Dynamic magnet ring 9 is put just, 8 sets of magnetostatic ring on lower inner sleeve 7, is moved at this time
Upper outer sleeve 6 is passed through the second sunk screw on the contrary, the state repelled each other both i.e. is presented by the magnetizing direction of magnet ring 9 and magnetostatic ring 8
5 are fixed on the downside of upper plate 4, and pressure sensor 3 is fixed on the upside of upper plate 4 by the first sunk screw 2.
Finally, threaded rod 1 to be passed through to the centre of device, there is the side of cylindrical hole in lower section, with 11 inserting hole of card rod
It is interior, 12 axial position of lower plate is limited, in the upper end elder generation mounting gasket 14 of 1 upper end of threaded rod, that is, pressure sensor 3, then spin nut
15, it contacts nut 15 with washer 14, finally connect pressure display unit 16 with pressure sensor 3.
Working principle of the present invention is as follows:
First magnetostatic ring 8 with dynamic magnet ring 9 since repulsion acts on, all respectively against respective outer sleeve, and internal diameter with
As lower inner sleeve 7, it is axially transportable that so the two magnet rings are concentric, i.e., two magnet rings are radially fixed.
Nut 15 is screwed, at this time as shown in figure 4, gap is primary clearance between two magnet rings of settingL 0；Secondly by spiral
Loading method applies upward load to dynamic magnet ring 9, and dynamic magnet ring 9, which has, at this time shifts up；Finally by clearance gauge (such as Fig. 3 institute
Show) measure two magnet ring gaps after loadL', while load value under this gap is measured using pressure sensor 3.
Wherein, pressure sensor structure figure as shown in connection with fig. 5, Φ A indicate that pressure sensor outer diameter, Φ B indicate pressure
The position base diameter of a circle that sunk screw is distributed on sensor, Φ C indicate that the outer diameter of pressure sensor threaded hole boss, M indicate
The size of threaded hole, H indicate that pressure sensor is always high, and H1 indicates that pressure sensor removes the height of projection section, and H2 indicates heavy
The height of head screw counter sink, Φ D indicate that the diameter of sunk screw counter sink, Φ D1 indicate the diameter of sunk screw screw hole.8
A sunk screw is evenly distributed on the basic circle of Φ B, selects range appropriate according to the magnetic force value of theoretical calculation, reselection is therewith
The size of corresponding pressure sensor.
Primary clearance is chosen when measurementL 0, load value can directly read (unitkg), it is converted into stressF(unitN), plug
Ruler selects two symmetric points when measuring respectivelyA、BTo minimize error, (magnet ring gap is respectively for measurementL A’,L B').By two
The measured value averaging twice of magnet ring gap (L'=(L A’+L B')/2), while two czermak space values are converted into axial displacement (axial position
It movesL=L 0 -L').
As soon as every rotation time nut 15 is write down correspondingFWithLIf nut 15 revolvesnIt is secondary, that is, havenGroup data, we by thisn
Group data are fitted to magnetic force and displacement relation figure, and the magnetic force obtained with theoretical calculation (molecular current method) and displacement relation figure phase
Comparison, so that it may the which whether numerical value that proof theory calculates is accurate.
Claims (2)
1. a kind of axial permanent magnetic suspension bearing mgnetic observations device, it is characterised in that: including threaded rod (1), the first sunk screw
(2), pressure sensor (3), upper plate (4), the second sunk screw (5), upper outer sleeve (6), lower inner sleeve (7), magnetostatic ring
(8), magnet ring (9), third sunk screw (10), card rod (11), lower plate (12), lower outer sleeve (13), washer (14), nut are moved
(15), pressure display unit (16)；The lower inner sleeve (7) is fixed on lower plate (12) by third sunk screw (10), institute
It states lower outer sleeve (13) to cover on lower inner sleeve (7), bottom is contacted with lower plate (12), and the dynamic magnet ring (9) covers lower interior
On sleeve (7), and the lower end of dynamic magnet ring (9) needs the upper-end contact with lower outer sleeve (13), and the magnetostatic ring (8) also covers
On lower inner sleeve (7), the magnetizing direction of magnetostatic ring (8) and dynamic magnet ring (9) is opposite and there are gaps；On the upper outer sleeve (6)
End is fixed on the downside of upper plate (4) by the second sunk screw (5), and lower end is in contact with magnetostatic ring (8), the pressure sensing
Device (3) is fixed on the upside of upper plate (4) by the first sunk screw (2), and the threaded rod (1) passes through the central part of device
Position, lower end cylindrical hole stretch out lower plate (12), and the card rod (11) is filled in the cylindrical hole of threaded rod (1) lower end, for limiting
Lower plate (12) axial position, the upper end elder generation mounting gasket (14) of pressure sensor (3), then by nut (15) from threaded rod (1)
Upper end is screwed down, and plays the role of spiral load；The pressure display unit (16) connect with pressure sensor (3).
2. axial permanent magnetic suspension bearing mgnetic observations device according to claim 1, it is characterised in that: the lower inner sleeve
(7) outer diameter is equal to the internal diameter of magnetostatic ring (8) and dynamic magnet ring (9), so that two magnet rings are concentric, i.e., two magnet rings are radially fixed,
It axially can be mobile along lower inner sleeve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639274.4A CN106124110B (en) | 2016-08-08 | 2016-08-08 | Axial permanent magnetic suspension bearing mgnetic observations device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610639274.4A CN106124110B (en) | 2016-08-08 | 2016-08-08 | Axial permanent magnetic suspension bearing mgnetic observations device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106124110A CN106124110A (en) | 2016-11-16 |
| CN106124110B true CN106124110B (en) | 2019-01-11 |
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| CN201610639274.4A Expired - Fee Related CN106124110B (en) | 2016-08-08 | 2016-08-08 | Axial permanent magnetic suspension bearing mgnetic observations device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644224B (en) * | 2016-12-29 | 2022-05-17 | 中国航天空气动力技术研究院 | Magnetic suspension bearing dynamic torque sensor |
| CN111912341A (en) * | 2020-08-11 | 2020-11-10 | 哈尔滨理工大学 | Mechanism for measuring displacement of suspended impeller of blood pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100392768C (en) * | 2003-01-21 | 2008-06-04 | 武汉理工大学 | Magnetic suspension hard disk single free degree property experiment platform |
| JP2008082426A (en) * | 2006-09-27 | 2008-04-10 | Ntn Corp | Magnetic bearing device |
| JP5448375B2 (en) * | 2008-06-18 | 2014-03-19 | 株式会社セイホー | Magnetic attractive force measuring device and magnetic attractive force measuring method |
| CN102331349B (en) * | 2011-06-17 | 2013-06-12 | 武汉理工大学 | Permanent magnetic bearing rigidity measuring device |
| CN103064038B (en) * | 2013-01-03 | 2015-04-08 | 武汉理工大学 | Unidirection mixing magnetic levitation testing device |
| CN103680270B (en) * | 2013-12-13 | 2015-11-25 | 河海大学 | A kind of hydraulic generator rotor magnetic levitation load bearing system experimental provision and adjustment method |
| CN205175691U (en) * | 2015-10-29 | 2016-04-20 | 昆明理工大学 | Experimental device for measure air supporting hydrostatic bearing bearing capacity |
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Granted publication date: 20190111 Termination date: 20210808 |