CN2562188Y - Magnetic bearing for kilowatt meter - Google Patents
Magnetic bearing for kilowatt meter Download PDFInfo
- Publication number
- CN2562188Y CN2562188Y CN 02243965 CN02243965U CN2562188Y CN 2562188 Y CN2562188 Y CN 2562188Y CN 02243965 CN02243965 CN 02243965 CN 02243965 U CN02243965 U CN 02243965U CN 2562188 Y CN2562188 Y CN 2562188Y
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- CN
- China
- Prior art keywords
- magnetic
- permanent magnet
- electric energy
- energy meter
- magnetic bearing
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- Expired - Fee Related
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Abstract
The utility model relates to a magnetic bearing mainly used for a mechanical sensing type electric energy meter. An even-magnetic plate is arranged on an effective working polar plane of a permanent magnetic body which consists of a movable permanent magnetic body and a fixing permanent magnetic body. The even-magnetic plate is arranged on the effective polar planes of the movable permanent magnetic body and the fixing permanent magnetic body. The utility model has the advantages that: (1) the even-magnetic plate improves the evenness of the effective working magnetic field of the magnetic bearing, balances the magnetic damping moment of the magnetic bearing and improves the initiating sensitivity and the creeping stability of the electric energy meter; (2) the even-magnetic plate compensates the strength variation of the effective working magnetic field, which is caused by the permanent magnetic body impacted by environmental temperature, guarantees the stability of the working state of the magnetic bearing and improves the measuring accuracy of the electric energy meter; (3) the even-magnetic plate screens the quality shortcoming of the permanent magnetic body, reduces the impact factors determining the effective working magnetic quality of the magnetic bearing, facilitates the quality of the magnetic bearing to be more easily guaranteed and improves the quality and manufacturing qualification rate of the electric energy meter.
Description
Technical field: the utility model relates to a kind of magnetic bearing, is mainly used in the mechanical induction type electric energy meter, belongs to the electric energy meter key components and parts and makes the field.
Background technology: present magnetic bearing, the magnetic field that movable permanent magnet and fixed permanent magnet produce, " contact " directly in the intervals of business, the magnetic bearing magnetic field state of effectively working is directly determined by magnetic field of permanent magnet.Because the material defective brought by manufacture process of permanent magnet is subject to processing the restriction of means in addition, permanent magnet surfaces is easy to generate and effective magnetic field in the same way stray magnetic field not; Influenced by duty, the bearing accuracy when magnet magnetizes, the parts processing of magnetizing assembly and the precision of assembling etc., permanent magnet exists that the regional area magnetic field intensity does not wait, concentric circumferences magnetic field symmetry is bad, the capital makes the magnetic field symmetry of movable permanent magnet and fixed permanent magnet can not get guaranteeing, has caused effectively the work uniformity coefficient in magnetic field of magnetic bearing to can not get guaranteeing; Do not come the uniformity coefficient of detection type owing to also there is effective measurement means at present like magnetic field, effectively the work uniformity coefficient in magnetic field of magnetic bearing is controlled indirectly by production run, the quality of product and consistency of performance can not get guaranteeing, the qualification rate of product is low, the raising of the performance index of (with magnetic bearing) electric energy meter is restricted, and the production qualification rate of electric energy meter also is subjected to serious restriction.Secondly, permanent magnet is with the variation of environment temperature, the magnetic field intensity that produces is followed variation, present magnetic bearing general does not compensate the temperature effect of permanent magnet, and the intensity in effective work magnetic field of magnetic bearing will change with the change of environment temperature, the duty of magnetic bearing changes thereupon, influenced the metering precision of electric energy meter under ambient temperature effect, to the demanding electric energy meter of the accuracy of measuring, present magnetic bearing can't use.
Summary of the invention:
Purpose of design: avoid the weak point in the background technology, the one, by poly-magnetic, filter magnetic and the magnetic temp compensating effect of even magnetic sheet, improve the magnetic bearing uniformity coefficient in magnetic field of effectively working, and then improve the uniformity coefficient of magnetic bearing magnetic damping moment; The 2nd, compensation changes because of effective work magnetic field magnetic strength of permanent magnet generation influenced by ambient temperature, stablizes the duty of magnetic bearing; The 3rd, weaken magnetic bearing performance and quality degree of dependence to parts (quality factor such as the consistance of machining precision, bearing assembly quality, permanent magnet magnetization state and permanent magnet material), reduce the production difficulty, the consistance of enhancing product performance, improve the production qualification rate of magnetic bearing, and then improve the production qualification rate of electric energy meter.
Design philosophy: the magnetic bearing that is used for induction type electric energy meter at present mainly is made up of movable permanent magnet and fixed permanent magnet, movable permanent magnet is connected with the rotating element of electric energy meter, fixed permanent magnet is fixed on the pedestal of electric energy meter, movable permanent magnet and fixed permanent magnet are formed the magnetic system of bearing by guidance system, the magnetic field interaction that the magnet of this magnetic system produces produces an axial force, this power balances each other with the gravity of the electric energy meter rotating element that links to each other with movable permanent magnet, make and maintain a certain distance between two permanent magnets and do not contact, thereby the rotating element that makes electric energy meter is centered on the guide pin suspension rotation of guidance system, bearing wear is lacked than traditional jewel bearing, thereby prolongs the serviceable life of the electric energy meter of knowing clearly.Effectively the work uniformity coefficient in magnetic field of magnetic bearing is one of quality factor of magnetic bearing most critical, directly determines the uniformity coefficient of magnetic bearing rotary damping moment, the starting performance and the shunt running performance of decision electric energy meter; Effectively the work stability in magnetic field of magnetic bearing, the stability of decision magnetic bearing duty, the accuracy of measuring of decision electric energy meter under ambient temperature effect.
Design proposal: 1. on effective work pole-face of permanent magnet, install even magnetic sheet additional.The magnetic field that permanent magnet produces by even magnetic sheet, arrives the working clearance " contact " earlier again, and the effective magnetic field of working clearance is by even magnetic sheet " generation ", and performance state is mainly by even magnetic sheet decision.Poly-magnetic, filter magnetic action through even magnetic sheet, filter out the stray magnetic field of permanent magnet surfaces, in the fluctuating of the regional magnetic field of permanent magnet and in even magnetic sheet, the magnetic field that makes the permanent magnet generation is when arriving the working clearance, only show as the magnetic field of even magnetic sheet " mirror image ", thereby reach the purpose in the magnetic field of evenly effectively working.2. make the material of even magnetic sheet, available magnetic temperature compensating alloy, also available common ferromagnetic material.Magnetic temperature characterisitic with magnetic temperature characterisitic and permanent magnet forms complementary material---and be that magnetic temperature compensating alloy is made, energy synchroballistic changes because of effective work magnetic field magnetic strength of permanent magnet generation influenced by ambient temperature, effectively the work intensity in magnetic field of magnetic bearing is not changed with the variation of environment temperature, thereby the duty that makes magnetic bearing keeps stable, has improved the accuracy of measuring of electric energy meter.To the undemanding electric energy meter of ambient temperature effect performance requirement, the degree of stability of magnetic bearing duty can not done requirement, and even magnetic sheet can be made of common ferrimagnet.3. technical scheme: the special-purpose magnetic bearing of electric energy meter, it comprises permanent magnet, effective work pole-face of permanent magnet is equipped with even magnetic sheet (2).Permanent magnet is made up of movable permanent magnet (1) and fixed permanent magnet (3), and even magnetic sheet (2) is contained on the active polar surface of movable permanent magnet (1) and fixed permanent magnet (3) simultaneously.
The utility model is compared with background technology, and the one, even magnetic sheet has improved effectively the work uniformity coefficient in magnetic field of magnetic bearing, and the balanced magnetic damping moment of magnetic bearing has improved the starting sensitivity and the shunt running stability of (use magnetic bearing) electric energy meter; The 2nd, even magnetic sheet has compensated the Strength Changes in the effective work magnetic field that produces because of permanent magnet is influenced by ambient temperature, has guaranteed the stable of magnetic bearing duty, has improved the accuracy of measuring of electric energy meter; The 3rd, even magnetic sheet has shielded the mass defect of permanent magnet, reduced effectively the work influence factor of magnetic field quality of decision magnetic bearing, make the easier assurance of magnetic bearing product quality, the properties of product consistance is better, thereby has improved the product quality and the production qualification rate of (use magnetic bearing) electric energy meter.
Description of drawings:
Fig. 1 is the structural representation of first kind of embodiment of the present utility model.
Fig. 2 is the structural representation of second kind of embodiment of the present utility model.
Fig. 3 is the structural representation of the third embodiment of the present utility model.
Fig. 4 is the structural representation of the 4th kind of embodiment of the present utility model.
Fig. 5 is the structural representation of the 5th kind of embodiment of the present utility model.
Fig. 6 is the structural representation of the 6th kind of embodiment of the present utility model.
Embodiment:
Embodiment 1: with reference to accompanying drawing 1.Even magnetic sheet 2 is contained on the active polar surface of movable permanent magnet 1 and fixed permanent magnet 3 simultaneously.Even magnetic sheet 2 usefulness bonding agents directly are fitted on the permanent magnet active polar surface, or it is sealed, inlays or riveted is fixed on the permanent magnet active polar surface, or it is sealed, inlays, sticks on the active polar surface of permanent magnet behind the riveted with nonferromugnetic materials such as engineering plastics with nonferromugnetic materials such as engineering plastics.The manufacturing technology of movable permanent magnet 1 and fixed permanent magnet 3 and even magnetic sheet 2 is a prior art, is not described herein at this.Even magnetic sheet 2 adopts magnetic temperature compensating alloy or other ferrimagnets to make.
Embodiment 2: with reference to accompanying drawing 2.Even magnetic sheet 2 is contained in separately on the active polar surface of movable permanent magnet 1.
Embodiment 3: with reference to accompanying drawing 3.Even magnetic sheet 2 is contained in separately on the active polar surface of fixed permanent magnet 3.
Embodiment 4: with reference to accompanying drawing 4.Even magnetic sheet 2 is contained on the active polar surface of movable permanent magnet 1 and fixed permanent magnet 3 simultaneously, adopts plastics 4 to seal fixing.
Embodiment 5: with reference to accompanying drawing 5.Even magnetic sheet 2 is contained in separately on the active polar surface of movable permanent magnet 1, adopts bonding agent applying method to fix.
Embodiment 6: with reference to accompanying drawing 6.Even magnetic sheet 2 is contained in separately on the active polar surface of fixed permanent magnet 3, adopts structural member 4 flanging to add bonding agent and fits fixing.
Claims (5)
1, the special-purpose magnetic bearing of a kind of electric energy meter, it comprises permanent magnet, it is characterized in that: effective work pole-face of permanent magnet is equipped with even magnetic sheet (2).
2, the special-purpose magnetic bearing of electric energy meter according to claim 1, permanent magnet is made up of movable permanent magnet (1) and fixed permanent magnet (3), it is characterized in that: even magnetic sheet (2) is contained on the active polar surface of movable permanent magnet (1) and fixed permanent magnet (3) simultaneously.
3, the special-purpose magnetic bearing of electric energy meter according to claim 1, permanent magnet is made up of movable permanent magnet (1) and fixed permanent magnet (3), it is characterized in that: even magnetic sheet (2) is contained in separately respectively on the active polar surface of movable permanent magnet (1) or fixed permanent magnet (3).
4, the special-purpose magnetic bearing of electric energy meter according to claim 1 is characterized in that: even magnetic sheet (2) adopts magnetic temperature compensating alloy or other ferrimagnets to make.
5, the special-purpose magnetic bearing of electric energy meter according to claim 1, it is characterized in that: even magnetic sheet (2) directly is fitted on the permanent magnet active polar surface with bonding agent, or it is sealed, inlays or riveted is fixed on the permanent magnet active polar surface, or it is sealed, inlays, sticks on the active polar surface of permanent magnet behind the riveted with nonferromugnetic materials such as engineering plastics with nonferromugnetic materials such as engineering plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02243965 CN2562188Y (en) | 2002-07-31 | 2002-07-31 | Magnetic bearing for kilowatt meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02243965 CN2562188Y (en) | 2002-07-31 | 2002-07-31 | Magnetic bearing for kilowatt meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2562188Y true CN2562188Y (en) | 2003-07-23 |
Family
ID=33716045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02243965 Expired - Fee Related CN2562188Y (en) | 2002-07-31 | 2002-07-31 | Magnetic bearing for kilowatt meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2562188Y (en) |
-
2002
- 2002-07-31 CN CN 02243965 patent/CN2562188Y/en not_active Expired - Fee Related
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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 |