CN102969195A - Axial adaptive bistable permanent magnetic mechanism with opening acceleration - Google Patents
Axial adaptive bistable permanent magnetic mechanism with opening acceleration Download PDFInfo
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- CN102969195A CN102969195A CN2012104538777A CN201210453877A CN102969195A CN 102969195 A CN102969195 A CN 102969195A CN 2012104538777 A CN2012104538777 A CN 2012104538777A CN 201210453877 A CN201210453877 A CN 201210453877A CN 102969195 A CN102969195 A CN 102969195A
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Abstract
The invention relates to the field of permanent magnetic mechanisms of medium-voltage vacuum circuit breakers, particularly to an axial adaptive bistable permanent magnetic mechanism with opening acceleration. The mechanism comprises an output shaft (12); a movable iron core (11) is sleeved outside the output shaft (12); and a self-lubricating guide sleeve (7), a bufferer (9), an opening solenoid (2), a static iron core (3), a closing solenoid (6) and an outer yoke (5) are sleeved outside the movable iron core (11). The mechanism is characterized in that the outer yoke (5) is a hollow cylinder, a magnetic short circuit ring (13) is arranged in the inner cavity of the outer yoke (5), and a magnetic short circuit air gap (18) is arranged between the magnetic short circuit ring (13) and the static iron core (3). The permanent magnetic mechanism has the advantages that the opening speed is improved obviously on the basis of simplification of the existing product structure, and the stability and practicability of the vacuum circuit breaker with the permanent magnetic mechanism are improved.
Description
Technical field
The present invention relates to middle pressure vacuum circuit-breaker permanent magnet mechanism field, especially a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration.
Background technology
Operating mechanism is key components of middle pressure vacuum circuit-breaker, and what be widely adopted at present has two kinds of spring operating mechanism and permanent-magnet manipulating mechanisms.The spring operating mechanism complex structure, the mechanical breakdown probability is high, and the workload that easily produces maintenance and safeguard is brought inconvenience to Subscriber Unit.Bistable-state permanent magnet mechanism of the present invention is a kind of of permanent-magnet operating mechanism, and characteristics simple in structure because of it, stable mechanical performance are widely used, and the development trend that replaces spring operating mechanism is arranged gradually.The groundwork principle of bistable-state permanent magnet mechanism is: Electromagnetic Drive, and permanent magnetism keeps; Concretely, exactly close, in the sub-switching operation process, give closed accordingly, switching winding passes to suitable electric current, produces the electromagnetic force that can overcome the permanent magnetism confining force by this electric current, drive moving iron core move up and down produce close, energy displacement output that separating brake needs.Close, separating brake puts in place and need not the mechanical lock buckle device, utilizes permanent magnet that permanent magnetic is provided fully, with moving stable being pull-in on the static iron core ad-hoc location of iron core, thereby keeps reliably that vacuum circuit-breaker closes, gate-dividing state.
Traditional bistable-state permanent magnet mechanism close, during sub-switching operation, because by the electromagnetic force of closing, the electric current of switching winding produces, need to be in overcoming permanent magnet confining force and sound iron core frictional force and magnetic screen hermetically-sealed construction do work with dump energy on the basis of compressed air resistance, when dump energy is not enough, cause the low arc reignition that causes of middle pressure vacuum circuit-breaker opening velocity, the separating brake failure affects electric power system and normally moves.At present, traditional product addresses this problem, and the following several method of many employings: (1) increases many tripping springs and improves opening velocities in the vacuum circuit breaker mechanism case; (2) adopt to improve close, the effective value of minute brake current promotes and closes, the separating brake electromagnetic force gathers way; (3) permanent magnetism, electromagnetic circuit are divided into the hands-off two-part structure of magnetic circuit and arrange the raising initial velocity.
In addition, traditional permanent magnet mechanism product, location and the guiding of the moving iron core motion of its design are to utilize output shaft to extend permanent magnet mechanism top cover and bottom, rely on the middle location hole of opening of top bottom and realize location and guide function.
The enforcement of these designs, the problem of existence is: (1) mechanical transmission component is many, and the fault point increases, and power transmission loss is large, and opening velocity promotes not obvious; (2) adopting the consequence that improves separating brake current value lifting opening velocity is the cost that has increased DC power system, also improves the risk of electric fault.(3) utilize traditional permanent magnet mechanism moving iron core location and navigation designing scheme, so that the permanent magnet mechanism complex structure, volume increases; Therefore, under the background of simplifying the traditional product structure, design a kind of permanent magnet mechanism that can obviously improve opening velocity and have the comparatively meaning of reality.
Summary of the invention
The purpose of this invention is to provide a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration, on the basis of having simplified the existing product structure, significantly promote the permanent magnet mechanism opening velocity.
A kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration, comprise output shaft, outside this output shaft, be set with moving iron core, outside this moving iron core, also be set with self-lubricating guide sleeve, buffering, switching winding, static iron core, closing coil and outer yoke, and the top cover and the bottom that are installed in side, output shaft two ends, between outer yoke middle part and static iron core, a watt type magnet is installed in addition, its special feature is: described outer yoke is hollow cylinder, be provided with magnetic short circuited ring in the chamber within it, be provided with the magnet short-cut path air gap between this magnetic short circuited ring and the static iron core.
Wherein moving iron core is hollow cylinder, is provided with axial gas pressure relief slot at its outer surface, also is provided with relief hole on this gas pressure relief slot, thus the compressed air resistance release that will produce in the time of jointly will moving iron core and in enclosed construction, move; Be the frustum of a cone on the moving iron core in addition, and the lower end is the spill end face.
Wherein an end of output shaft stretches out outside the bottom, and the other end of this output shaft passes from the inner chamber of self-lubricating guide sleeve, buffering and moving iron core and with moving iron core be interference fit, the output shaft end is fixed in the groove on the moving iron core in the top cover.
Wherein magnetic short circuited ring, watt type magnet and static iron core are divided into up and down two compartments with the inner chamber of outer yoke, in upper compartment switching winding are installed, and in lower compartment closing coil are installed.
Wherein self-lubricating guide sleeve is the copper hollow cylinder of inlaying graphite, and this self-lubricating guide sleeve is installed in the below of buffering.
Wherein between switching winding and moving iron core the self-lubricating guide ring is installed, the material of this self-lubricating guide ring is polytetrafluoroethylene, and this self-lubricating guide ring equates with the switching winding height.
The present invention is directed to the problems referred to above, a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration is provided, employing is different from the schemes such as the embedded adaptive location of traditional mechanism and guide frame, non-equidistance motion magnetic circuit, Compressed Gas pressure release passage, magnet short-cut path air gap, buffering, self-lubricating parts, significantly promotes the permanent magnet mechanism opening velocity on the basis of having simplified the traditional product structure.The invention has the beneficial effects as follows: a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration is provided, the schemes such as the embedded adaptive location that is different from traditional mechanism and guide frame, non-equidistance motion magnetic circuit, Compressed Gas pressure release passage, magnet short-cut path air gap, buffering, self-lubricating parts have been adopted, on the basis of having simplified the traditional product structure, significantly promote the permanent magnet mechanism opening velocity, improved stability and the practicality of permanent magnetic actuator vacuum circuit breaker.
Description of drawings
Accompanying drawing 1 is that bistable-state permanent magnet mechanism of the present invention is at the schematic diagram of gate-dividing state;
Accompanying drawing 2 is that bistable-state permanent magnet mechanism of the present invention is at the schematic diagram of "on" position;
Accompanying drawing 3 is that bistable-state permanent magnet mechanism of the present invention is at the schematic diagram of separating brake process initial condition;
Accompanying drawing 4 is the structural representation of moving iron core (11) in the bistable-state permanent magnet mechanism of the present invention.
Embodiment
Such as Fig. 1,2, shown in 3, the present invention is a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration, comprise output shaft 12, outside this output shaft 12, be set with moving iron core 11, outside this moving iron core 11, also be set with self-lubricating guide sleeve 7, buffering 9, switching winding 2, static iron core 3, closing coil 6 and outer yoke 5, and the top cover 1 and the bottom 8 that are installed in side, output shaft 12 two ends, a watt type magnet 4 is installed between outer yoke 5 middle parts and static iron core 3 in addition, described outer yoke 5 is hollow cylinder, be provided with magnetic short circuited ring 13 within it in the chamber, be provided with magnet short-cut path air gap 18 between this magnetic short circuited ring 13 and the static iron core 3.
As shown in Figure 4, wherein moving iron core 11 be hollow cylinder, is provided with axial gas pressure relief slot 14 at its outer surface, also is provided with relief hole 15 on this gas pressure relief slot 14, thus the compressed air resistance release of generation in the time of jointly will moving iron core 11 and in enclosed construction, move; Moving iron core 11 upper ends are the frustum of a cone 17 in addition, and the lower end is the plane.One end of output shaft 12 stretches out outside the bottom 8, and the other end of this output shaft 12 passes from self-lubricating guide sleeve 7, buffering 9 and the inner chamber of moving iron core 11 and be interference fit with moving iron core 11, and its end is fixed in the groove 20 on the moving iron core 11 in the top cover 1.Magnetic short circuited ring 13, watt type magnet 4 and static iron core 3 are divided into up and down two compartments with the inner chamber of outer yoke 5, switching winding 2 is installed in upper compartment, and closing coil 6 is installed in lower compartment.
Self-lubricating guide sleeve 7 is the copper hollow cylinder of inlaying graphite in addition, and this self-lubricating guide sleeve 7 is installed in the below of buffering 9.And self-lubricating guide ring 10 is installed between switching winding 2 and moving iron core 11, the material of this self-lubricating guide ring 10 is polytetrafluoroethylene, and this self-lubricating guide ring 10 highly equates with switching winding 2.
Operation principle of the present invention is as follows:
Between magnetic short circuited ring 13 and static iron core 3, be provided with magnet short-cut path air gap 18, moving upward of the servo-actuated iron core 11 of the magnetic resistance of this short circuit air gap 18, gradually less than the magnetic resistance that moves 8 of iron core 11 and bottoms, approximate with watt type magnet 4 magnet short-cut paths, the counter-force of buffering 9 is superimposed upon on the electromagnetic force of switching winding 2, acting in conjunction moves upward in moving iron core 11, obtains the acceleration of effective separating brake;
Also has the feature of the frustum of a cone 17 in moving iron core 11 upper ends, its superiority is under moving iron core 11 mediates state, the frustum of a cone 17 of upper end and the conical socket magnetic at top cover 1 middle part keep the air gap vertical range of face 19, dwindled about 20% than the air gap vertical range between the annulus boss at the spill end face 16 of lower end and bottom 8 middle parts, formed a kind of up and down non-isometric magnetic structure, magnetic resistance when iron core 11 is moved upward obtains effective separating brake acceleration less than the magnetic resistance that moves downward;
Different from existing permanent magnet mechanism, the present invention need not to realize guide function at top cover 1 center drilling, and utilization of the present invention has the materials such as the polytetrafluoroethylene, graphite of lubricating function and carry out adaptive motion guide, and effect adopts lubricating oil better than traditional mechanism.
Claims (6)
1. axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration, comprise output shaft (12), outside this output shaft (12), be set with moving iron core (11), outside this moving iron core (11), also be set with self-lubricating guide sleeve (7), buffering (9), switching winding (2), static iron core (3), closing coil (6) and outer yoke (5), and the top cover (1) and the bottom (8) that are installed in side, output shaft (12) two ends, between outer yoke (5) middle part and static iron core (3), a watt type magnet (4) is installed in addition, it is characterized in that: described outer yoke (5) is hollow cylinder, be provided with magnetic short circuited ring (13) within it in the chamber, be provided with magnet short-cut path air gap (18) between this magnetic short circuited ring (13) and the static iron core (3).
2. a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration as claimed in claim 1, it is characterized in that: wherein moving iron core (11) is hollow cylinder, be provided with axial gas pressure relief slot (14) at its outer surface, on this gas pressure relief slot (14), also be provided with relief hole (15), thereby the compressed air resistance that will produce in the time of jointly will moving iron core (11) and move discharges in enclosed construction; Be the frustum of a cone (17) on the moving iron core (11) in addition, and the lower end is spill end face (16).
3. a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration as claimed in claim 1, it is characterized in that: wherein an end of output shaft (12) stretches out outside the bottom (8), and the other end of this output shaft (12) passes from the inner chamber of self-lubricating guide sleeve (7), buffering (9) and moving iron core (11) and be that with moving iron core (11) interference fit, output shaft (12) end are fixed in the groove (20) on the interior moving iron core (11) of top cover (1).
4. a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration as claimed in claim 1, it is characterized in that: wherein magnetic short circuited ring (13), watt type magnet (4) and static iron core (3) are divided into up and down two compartments with the inner chamber of outer yoke (5), switching winding (2) is installed in upper compartment, and closing coil (6) is installed in lower compartment.
5. a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration as claimed in claim 1, it is characterized in that: wherein self-lubricating guide sleeve (7) is the copper hollow cylinder of inlaying graphite, and this self-lubricating guide sleeve (7) is installed in the below of buffering (9).
6. a kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration as claimed in claim 1, it is characterized in that: wherein between switching winding (2) and moving iron core (11), self-lubricating guide ring (10) is installed, the material of this self-lubricating guide ring (10) is polytetrafluoroethylene, and this self-lubricating guide ring (10) highly equates with switching winding (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210453877.7A CN102969195B (en) | 2012-11-14 | 2012-11-14 | Axial adaptive bistable permanent magnetic mechanism with opening acceleration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210453877.7A CN102969195B (en) | 2012-11-14 | 2012-11-14 | Axial adaptive bistable permanent magnetic mechanism with opening acceleration |
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| CN102969195A true CN102969195A (en) | 2013-03-13 |
| CN102969195B CN102969195B (en) | 2014-11-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449277A (en) * | 2016-10-28 | 2017-02-22 | 游民 | Self-closing magnetic circuit permanent magnetic mechanism for switch |
| CN108899231A (en) * | 2018-07-24 | 2018-11-27 | 四川标杆电气有限公司 | It is a kind of with the hermetic type permanent-magnet manipulating mechanism and its control method of keeping away magnet passage |
| CN110739191A (en) * | 2018-07-20 | 2020-01-31 | 施耐德电器工业公司 | Electromagnetic release |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4044204A1 (en) * | 2021-02-15 | 2022-08-17 | HUSCO Automotive Holdings LLC | Multi-stable solenoid having an intermediate pole piece |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0871192A2 (en) * | 1996-11-11 | 1998-10-14 | ABB Research Ltd. | Magnetic actuator |
| CN2337668Y (en) * | 1998-03-11 | 1999-09-08 | 王光顺 | Permanent-magnetic operating mechanism for vacuum switch |
| CN101789318A (en) * | 2010-03-30 | 2010-07-28 | 西安交通大学 | Novel bistable permanent magnetic actuator capable of increasing instantaneous opening speed |
| CN203038850U (en) * | 2012-11-14 | 2013-07-03 | 宁夏力成电气集团有限公司 | Axial adaptive bi-stable permanent magnetic actuator with brake acceleration |
-
2012
- 2012-11-14 CN CN201210453877.7A patent/CN102969195B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0871192A2 (en) * | 1996-11-11 | 1998-10-14 | ABB Research Ltd. | Magnetic actuator |
| CN2337668Y (en) * | 1998-03-11 | 1999-09-08 | 王光顺 | Permanent-magnetic operating mechanism for vacuum switch |
| CN101789318A (en) * | 2010-03-30 | 2010-07-28 | 西安交通大学 | Novel bistable permanent magnetic actuator capable of increasing instantaneous opening speed |
| CN203038850U (en) * | 2012-11-14 | 2013-07-03 | 宁夏力成电气集团有限公司 | Axial adaptive bi-stable permanent magnetic actuator with brake acceleration |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449277A (en) * | 2016-10-28 | 2017-02-22 | 游民 | Self-closing magnetic circuit permanent magnetic mechanism for switch |
| CN110739191A (en) * | 2018-07-20 | 2020-01-31 | 施耐德电器工业公司 | Electromagnetic release |
| CN108899231A (en) * | 2018-07-24 | 2018-11-27 | 四川标杆电气有限公司 | It is a kind of with the hermetic type permanent-magnet manipulating mechanism and its control method of keeping away magnet passage |
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| CN102969195B (en) | 2014-11-26 |
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Denomination of invention: An axial adaptive bistable permanent magnet mechanism with opening acceleration Effective date of registration: 20201231 Granted publication date: 20141126 Pledgee: China Construction Bank Corporation Yinchuan Xixia sub branch Pledgor: NINGXIA LICHENG GROUP Co.,Ltd. Registration number: Y2020640000006 |
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Effective date of registration: 20230530 Granted publication date: 20141126 |