CN2313227Y - Self-centring magnetic-suspension bearing system for electric meter - Google Patents
Self-centring magnetic-suspension bearing system for electric meter Download PDFInfo
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- CN2313227Y CN2313227Y CN 97206408 CN97206408U CN2313227Y CN 2313227 Y CN2313227 Y CN 2313227Y CN 97206408 CN97206408 CN 97206408 CN 97206408 U CN97206408 U CN 97206408U CN 2313227 Y CN2313227 Y CN 2313227Y
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- magnet ring
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Abstract
The utility model relates to a self centering magnetic suspension bearing system for an electricity meter. The utility model comprises an inner magnetic ring 1, an outer magnetic ring 2, a guiding needle 3, a guiding ring, and a shaft connector (or a rotating shaft) 5. Through the utility model, a movable magnetic ring can be suspended on an axial direction, radial centripetal component force is generated, and the movable magnetic ring has the function of self centering. Friction, wear, and impact between the guiding needle and the guiding ring are eliminated, and therefore, the utility model has the advantages of no friction, no wear, no noise, long service, simple structure, small size, simple magnetized process, and low cost.
Description
The utility model belongs to the instrument and meter components and parts, is mainly used in watt-hour meter.
The object of a position rotating always is rotated by means of the support of bearing arrangement.The watt-hour meter rosette also is support by means of the bearing arrangement on the rotating disk assembly in rotation under the effect of electromagnetic component with the integrating electric energy.Existing watt-hour meter bearing arrangement has following several form: one. steel ball jewel bearing system
1. single jewel bearing system (seeing accompanying drawing 1).Single jewel bearing is made up of flute profile jewel and the steel ball that is embedded in the shaft joint tip.Loading ability of bearing the total weight of watt-hour meter dial assembly, the normal pressure that is subjected on steel ball and the jewel contact point is very big, friction force is bigger, it is also very fast to wear and tear.For the power of reducing friction, point has lubricating oil between steel ball and the jewel, and abrasive dust and lubricating oil are mixed, and lubricating oil volatilizees and dries up, and the bearing arrangement friction is sharply increased, and the watt-hour meter performance degenerates very soon, and be no more than 5 years general serviceable life.
2. two jewel bearing systems (seeing accompanying drawing 2) are the improvement to single jewel bearing system.Because steel ball rolls between two flute profile jewels, so the sliding friction by single jewel bearing between them has become rolling friction, significantly reducing of the more single jewel of friction force, wearing and tearing do not resemble yet and are fixed on a bit single jewel steel ball, but still exist the problem that normal pressure is big and lubricating oil is dry, so though the serviceable life of two jewel bearing watt-hour meter is than the prolongation that has of single jewel, generally about about 10 years.Two. magnetic levitation bearing system
1. face one pole type magnetic bearing system (seeing accompanying drawing 3).Because the suffered normal pressure of friction force and surface in contact is directly proportional, adopt the normal pressure between the magnetic bearing system intention elimination steel ball jewel.Because exist repulsive force and rotating disk balanced between the magnet ring up and down, magnet ring does not contact mutually up and down, between the two zerofriction force.But as shown in Figure 4, up and down between the magnet ring since various enchancement factors both center lines always do not overlap, because center line do not overlap, so magnetic thrust is radially existing the component with tendency to drift away all the time, this component causes bump between guide pin and the guide ring and friction, wearing and tearing.The running noise of general magnetic bearing, be strike note, so the patent (number of patent application is 88211616.9) of low noise watt-hour meter magnetic levitation bearing system is just arranged, this patent essence is that the length of lengthening guide pin reaches the flexibility that increases guide pin and reduces impact noise.But because the increase of guide pin flexibility has increased magnet ring center displacement up and down, so centrifugal component is bigger, thereby the friction and wear between guide pin and the guide ring is also just bigger, and the relation between radial component and the radial displacement as shown in Figure 5.Adopt the moment of friction of this one pole type magnetic bearing little by the initial friction moment of power taking kilsyth basalt unlike two jewels, its advantage is not dry up and the sticking phenomenon of formation along with increase working time can not produce lubricating oil, but the existence of rubbing wear between guide pin and the guide ring, the serviceable life of this watt-hour meter is equally matched with two jewel bearing watt-hour meter.
2. face bipolar magnetic bearing system (as shown in Figure 6).Two magnetic poles are arranged on the same polarity face of the magnet ring up and down of this bearing arrangement, and one is the N utmost point, and one is the S utmost point.Attractive force between the opposite pole on two opposite polarities on the same one side of face bipolar magnetic bearing and the magnet ring face has been offset the centrifugal radial force of the repulsion between the same polarity, so radial centrifugal force than face one pole type be little, but do not eliminate at all; Friction between guide pin and the guide ring, wearing and tearing are also than be little, but still existence.This structure complex process that magnetizes, cost is also higher.
3. magnetcisuspension suspension bearing system (as accompanying drawing 7).U.S. GE company adopts this structure.The outer magnetic ring of this magnetic bearing system of GE company is made up of two magnetic circuits, and internal magnetic ring forms three pole surfaces that distribute vertically through magnetizing.Though this bearing arrangement has been eliminated centrifugal force radially, complex structure, three pole surfaces of the internal magnetic ring difficulty that magnetizes, fill bad magnetic polarity maldistribution, can not eliminate centrifugal force radially effectively, volume is big, the cost height, popularization is had any problem.
The purpose of this utility model:
The utility model is a kind of improvement to existing magnetic levitation bearing system.Its purpose is to provide a kind of novel magnetic suspension bearing arrangement, this bearing arrangement can not only be eliminated the normal pressure of the vertical direction that watt-hour meter rotating part weight produces and the friction and wear that causes, eliminate movable magnet ring with simple force method again and be subjected to fixedly magnet ring the radial centrifugal force of its formation, be positioned the axle center running and make it be subjected to a radial force entad, play Self-centering Action, eliminate the contact pressure between guide ring and the guide pin, eliminate radial friction and wearing and tearing.
Content of the present utility model:
The purpose of this utility model be achieved in that this magnetic levitation bearing system by movable magnet ring and fixedly magnet ring form, movable magnet ring and shaft joint (or spool) link to each other.The diameter of movable magnet ring is little than the fixing diameter of magnet ring, and the magnetic polarity on the plane that two magnet rings are relative is identical, thereby movably magnet ring is subjected to fixedly repulsive force F of magnet ring.Because the diameter of movable magnet ring is less, thereby this power F can resolve into the component Fh and the radial component Fr (as shown in Figure 14) of vertical direction.The balanced of Fh and watt-hour meter moving part is in order to hold up the weight of moving part.Fr its radially in the scope of activities its direction entad be all the time.Thereby movable magnet ring when rotated can self-centering, and friction and wear has therebetween also been eliminated in the contact of having eliminated between guide pin and the guide ring.
Larger-diameter fixedly magnet ring also can be enclosed within the outside than the movable magnet ring of minor diameter, and along its axial charging, magnetizing direction is identical with two magnet rings, forms magnetic system as shown in Figure 13.The thrust F that the movable magnet ring than minor diameter in then being inclusive in is subjected to can resolve into axial force F h and radial force Fr, and radial force Fr entad also is.The relation of Fr and radial displacement as shown in Figure 11, radial displacement is big more, centripetal force Fr is also just big more, has strong Self-centering Action.The relation of axial thrust load Fh and axial displacement as shown in Figure 10.
Preferably fixing outer magnetic ring is made pea shape.The magnet ring of bowl-type is equivalent to the combination of two magnet rings, and one is a magnet ring that is enclosed within movable magnet ring outside as shown in Figure 13; It is that movable magnet ring of the diameter below movable magnet ring is big plane magnet ring two as shown in Figure 14.These two magnet rings all produce a radial component entad to movable magnet ring, are the combinations of above-mentioned two schemes.Thereby self-centering effect is all stronger than top two schemes.Eliminated the friction and wear between radial pressure and the guide ring.
Advantage or good effect:
Existing one pole type magnetic suspension bearing and the ambipolar bearing of face are because movable magnet ring is all big with fixing magnet ring diameter etc., thereby because enchancement factor, movable magnet ring just produces centrifugal force in a disalignment slightly, thereby cause bump and friction and wear between guide ring and the guide pin, and the diameter of movable magnet ring of the present utility model is little than the fixing diameter of magnet ring, thereby radially be subjected to the centripetal force effect all the time in the scope of activities at it.Eliminate centrifugal force and produced Self-centering Action.And structure is simple especially, and magnetizing all is simple axial charging, and technology is very simple, and general magnetizing equipment can both be accomplished.
The utility model is compared with the magnetic suspension bearing of U.S. GE company, as long as we make bowl-type with fixing outer magnetic ring, and the two magnet rings polarity that magnetizes just can both guarantee the enough axial moving part weight that suspended on the contrary, can produce strong Self-centering Action again.Structure is extremely simple, and the technology that magnetizes is also simple, and the homogeneity that magnetizes can guarantee that also volume is also little, helps the installation of watt-hour meter register.
The drawing explanation
Accompanying drawing 1 is the synoptic diagram of single jewel bearing watt-hour meter.
Accompanying drawing 3 is structural representations of face one pole type magnetic bearing.
The synoptic diagram of the magnetic thrust F that accompanying drawing 4 is subjected to when being the movable magnet ring of face one pole type magnetic bearing disalignment, wherein Fh is the axial thrust load of this power, Fr is its radial component.
Accompanying drawing 6 is structural representations of the ambipolar magnetic bearing of face.
Accompanying drawing 7 is magnetcisuspension suspension bearing synoptic diagram of GE company.
Accompanying drawing 8 is that fixedly magnet ring is enclosed within the structure cut-away view of movable magnet ring outside.Wherein 1 is movable magnet ring, the 2nd, and fixing magnet ring, the 3rd, guide pin, the 4th, guide ring, the 5th, shaft joint, N and S represent the north and south poles of magnet ring.
Accompanying drawing 9 is the utility model hangs usefulness as magnetcisuspension embodiment.Wherein 1 is movable internal magnetic ring, the 2nd, and the outer magnetic ring of fixing, the 3rd, guide pin, the 4th, guide ring, the 5th, rotating shaft, N and S represent the north and south poles of magnetic pole, and two magnet ring polarity are opposite, and axial force F h makes progress, the moving part weight of slinging, radial force remains centripetal force.
Accompanying drawing 10 is accompanying drawing 8 and the vertical axial component of accompanying drawing 9 embodiment and the relation curve of axial displacement, and wherein Fh is an axial thrust load, and h is axial displacement, in mm.
Accompanying drawing 11 is the radial component Fr of above-mentioned two embodiment and the relation curve between the radial displacement r, and wherein r is in mm.
Accompanying drawing 12 is make the embodiment that bowl-type is made magnetic bearing when fixing big magnet ring, and wherein 1 is movable bead, the 2nd, and the fixing big magnet ring of bowl-type, the 3rd, guide pin, the 4th, guide ring, the 5th, shaft joint.N and S represent the north and south poles of magnetic pole.
Accompanying drawing 13 is synoptic diagram and resolution of force thereof of acting force between bowl-type magnet ring annular edge and the movable magnet ring, and wherein Fh is an axial thrust load, and Fr is a radial component, and N and S represent the polarity of magnetic pole.
Accompanying drawing 14 be the simplest a kind of embodiment also be the decomposing schematic representation of bowl-type magnet ring bottom.Wherein Fh is an axial thrust load, and Fr is a radial component, is centripetal force.N and S represent magnetic polarity.
Accompanying drawing 15 is another embodiment that the utility model hangs as magnetcisuspension, and fixedly magnet ring is bowl-type.Wherein 1 is movable bead, the 2nd, and the fixing big magnet ring of bowl-type, the 3rd, guide pin, the 4th, guide ring, the 5th, rotating shaft.N and S represent magnetic polarity.
Best embodiment
Example shown in accompanying drawing 12 and the accompanying drawing 15 is an illustrated embodiments, and wherein accompanying drawing 12 embodiment make lower bearing.Playing magnetic bearing uses; Accompanying drawing 15 is made head bearing magnetize suspension bearing and is used.Its advantage is clearly, simple in structure, the technology that magnetizes is simple, and any simple magnetizing equipment all can guarantee the magnetic homogeneity that magnetizes, and produces maximum vertical stress component and certain radial centripetal power with movable magnet ring at the bottom of its bowl-type, the annular edge of its bowl-type had both produced vertical stress component, produce radial centripetal power again, its combined action result is that vertical suspension power is big, and the centering effect is strong, as the watt-hour meter bearing arrangement, department is in the long-life of truly realizing watt-hour meter.
Claims (3)
1 one kinds of watt-hour meter magnetic levitation bearing systems, it comprises two magnet rings, guide pin, guide ring and shaft joint (or axle), the diameter that the it is characterized in that a movable magnet ring fixedly diameter of magnet ring is little.
2 magnetic levitation bearing systems according to claim 1 is characterized in that a larger-diameter fixedly magnet ring is enclosed within the outside than the movable magnet ring of minor diameter.
3 magnetic levitation bearing systems according to claim 2 is characterized in that larger-diameter fixedly magnet ring becomes bowl-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206408 CN2313227Y (en) | 1997-01-22 | 1997-01-22 | Self-centring magnetic-suspension bearing system for electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97206408 CN2313227Y (en) | 1997-01-22 | 1997-01-22 | Self-centring magnetic-suspension bearing system for electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2313227Y true CN2313227Y (en) | 1999-04-07 |
Family
ID=33926408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97206408 Expired - Fee Related CN2313227Y (en) | 1997-01-22 | 1997-01-22 | Self-centring magnetic-suspension bearing system for electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2313227Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075898A (en) * | 2019-12-25 | 2020-04-28 | 中国科学院微小卫星创新研究院 | Low-damping rotating device and operation method thereof |
-
1997
- 1997-01-22 CN CN 97206408 patent/CN2313227Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075898A (en) * | 2019-12-25 | 2020-04-28 | 中国科学院微小卫星创新研究院 | Low-damping rotating device and operation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |