CN102969195B - 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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- CN102969195B CN102969195B CN201210453877.7A CN201210453877A CN102969195B CN 102969195 B CN102969195 B CN 102969195B CN 201210453877 A CN201210453877 A CN 201210453877A CN 102969195 B CN102969195 B CN 102969195B
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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.Spring operating mechanism complex structure, mechanical breakdown probability is high, and the workload that easily produces maintenance and safeguard, brings inconvenience to Subscriber Unit.Bistable-state permanent magnet mechanism of the present invention is a kind of of permanent-magnet operating mechanism, because it is simple in structure, the feature of stable mechanical performance is widely used, and has gradually the development trend that replaces spring operating mechanism.The groundwork principle of bistable-state permanent magnet mechanism is: Electromagnetic Drive, and permanent magnetism keeps; Concretely, exactly in carrying out the operating process of splitting or integrating lock, pass to suitable electric current to corresponding splitting or integrating brake cable circle, by this electric current, produce an electromagnetic force that can overcome permanent magnetism confining force, drive moving iron core to move up and down and produce the energy displacement output that splitting or integrating lock needs.Splitting or integrating lock puts in place without mechanical lock buckle device, utilizes permanent magnet that permanent magnetic is provided completely, by moving stable being pull-in on static iron core ad-hoc location of iron core, thereby keeps reliably vacuum circuit-breaker splitting or integrating lock state.
Traditional bistable-state permanent magnet mechanism is when carrying out the operation of splitting or integrating lock, electromagnetic force due to the electric current generation by splitting or integrating brake cable circle, need to be in overcoming permanent magnet confining force and sound iron core frictional force and magnetic screen hermetically-sealed construction by dump energy, do work on the basis of compressed air resistance, when dump energy is not enough, cause the lower arc reignition that causes of middle pressure vacuum circuit-breaker opening velocity, separating brake failure, affects electric power system and normally moves.At present, traditional product addresses this problem, the following several method of many employings: (1) increases many tripping springs and improves opening velocities in vacuum circuit breaker mechanism case; (2) effective value that adopt to improve splitting or integrating brake current promotes splitting or integrating lock electromagnetic force and gathers way; (3) permanent magnetism, electromagnetic circuit are divided into the hands-off two-part structure of magnetic circuit and arrange raising initial velocity.
In addition, traditional permanent magnet mechanism product, location and the guiding of the moving iron core motion of its design, be to utilize output shaft to extend permanent magnet mechanism top cover and bottom, relies 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 fault point increases, and power transmission loss is large, and opening velocity promotes not obvious; (2) consequence that adopts raising separating brake current value to promote 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, make permanent magnet mechanism complex structure, volume increases; Therefore, simplifying under the background of traditional product structure, designing a kind of permanent magnet mechanism that can obviously improve opening velocity and there is the comparatively meaning of reality.
Summary of the invention
The object 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 existing product structure, significantly promote permanent magnet mechanism opening velocity.
A kind of axial self adaptation bistable-state permanent magnet mechanism with separating brake acceleration, comprise output shaft, at this output shaft, be set with moving iron core, self-lubricating guide sleeve, buffering outward, at this moving iron core, be also set with switching winding, static iron core, closing coil and outer yoke outward, and the top cover and the bottom that are arranged on 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, in chamber, be provided with magnetic short circuited ring within it, between this magnetic short circuited ring and static iron core, be provided with magnet short-cut path air gap.
Wherein moving iron core is hollow cylinder, at its outer surface, is provided with axial gas pressure relief slot, is also provided with relief hole on this gas pressure relief slot, thereby the compressed air resistance producing when jointly moving iron core is moved in enclosed construction discharges; Moving iron core upper end is the frustum of a cone in addition, and lower end is spill end face.
Wherein stretch out outside bottom one end of output shaft, and the other end of this output shaft from the inner chamber of self-lubricating guide sleeve, buffering and moving iron core through and with moving iron core be interference fit, output shaft end is fixed in the groove on the moving iron core in top cover.
Wherein magnetic short circuited ring, watt type magnet and static iron core are divided into upper and lower two compartments by 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 arranged on the below of buffering.
Wherein between switching winding and moving iron core, self-lubricating guide ring is installed, the material of this self-lubricating guide ring is polytetrafluoroethylene, and this self-lubricating guide ring equates with 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 permanent magnet mechanism opening velocity on the basis of having simplified 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 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 that are different from have been adopted, on the basis of having simplified traditional product structure, significantly promote permanent magnet mechanism opening velocity, improved stability and the practicality of permanent magnetic actuator vacuum circuit breaker.
Accompanying drawing explanation
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 bistable-state permanent magnet mechanism of the present invention.
Embodiment
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, self-lubricating guide sleeve 7, buffering 9, outside this moving iron core 11, be also set with 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 arranged on output shaft 12 sides, two ends, a watt type magnet 4 is installed in addition between outer yoke 5 middle parts and static iron core 3, described outer yoke 5 is hollow cylinder, in chamber, be provided with magnetic short circuited ring 13 within it, between this magnetic short circuited ring 13 and static iron core 3, be provided with magnet short-cut path air gap 18.
As shown in Figure 4, wherein moving iron core 11 is hollow cylinder, at its outer surface, is provided with axial gas pressure relief slot 14, on this gas pressure relief slot 14, is also provided with relief hole 15, thereby the compressed air resistance producing when jointly moving iron core 11 is moved in enclosed construction discharges; Moving iron core 11 upper ends are the frustum of a cone 17 in addition, and lower end is plane.Stretch out outside bottom 8 one end of output shaft 12, and the other end of this output shaft 12 from self-lubricating guide sleeve 7, buffering 9 and the inner chamber of moving iron core 11 through and with moving iron core 11 be interference fit, and its end is fixed in the groove 20 on the moving iron core 11 in top cover 1.Magnetic short circuited ring 13, watt type magnet 4 and static iron core 3 are divided into upper and lower two compartments by 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 arranged on 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 magnetic resistance of this short circuit air gap 18, be less than gradually the magnetic resistance of 8 of moving iron core 11 and bottoms, approximate by watt type magnet 4 magnet short-cut paths, making to cushion 9 counter-force is superimposed upon in the electromagnetic force of switching winding 2, acting in conjunction moves upward in moving iron core 11, obtains the acceleration of effective separating brake;
The feature also in moving iron core 11 upper ends with the frustum of a cone 17, its superiority is to mediate under state when moving iron core 11, 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, than the air gap vertical range between the spill end face 16 of lower end and the annulus boss at bottom 8 middle parts, dwindled 20% left and right, formed a kind of upper and lower non-isometric magnetic structure, magnetic resistance in the time of can making iron core 11 move upward is less than the magnetic resistance moving downward, and obtains effective separating brake acceleration;
Different from existing permanent magnet mechanism, the present invention is without realizing 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 (5)
1. an 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), self-lubricating guide sleeve (7), buffering (9), outside this moving iron core (11), be also set with 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 arranged on 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, in chamber, be provided with magnetic short circuited ring (13) within it, between this magnetic short circuited ring (13) and static iron core (3), be provided with magnet short-cut path air gap (18),
Wherein moving iron core (11) is hollow cylinder, at its outer surface, be provided with axial gas pressure relief slot (14), on this gas pressure relief slot (14), be also provided with relief hole (15), thereby the compressed air resistance producing in the time of jointly moving iron core (11) and move discharges in enclosed construction; Moving iron core (11) upper end is the frustum of a cone (17) in addition, and lower end is spill end face (16).
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 stretch out outside bottom (8) one end of output shaft (12), and the other end of this output shaft (12) from the inner chamber of self-lubricating guide sleeve (7), buffering (9) and moving iron core (11) through and with moving iron core (11) be interference fit, output shaft (12) end is fixed in the groove (20) on the interior moving iron core (11) of top cover (1).
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 magnetic short circuited ring (13), watt type magnet (4) and static iron core (3) are divided into upper and lower two compartments by the inner chamber of outer yoke (5), switching winding (2) is installed in upper compartment, and closing coil (6) is installed in lower compartment.
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 self-lubricating guide sleeve (7) is the copper hollow cylinder of inlaying graphite, and this self-lubricating guide sleeve (7) is arranged on the below of buffering (9).
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 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN201210453877.7A CN102969195B (en) | 2012-11-14 | 2012-11-14 | Axial adaptive bistable permanent magnetic mechanism with opening acceleration |
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| CN102969195A CN102969195A (en) | 2013-03-13 |
| CN102969195B true CN102969195B (en) | 2014-11-26 |
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| CN201210453877.7A Active CN102969195B (en) | 2012-11-14 | 2012-11-14 | Axial adaptive bistable permanent magnetic mechanism with opening acceleration |
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Cited By (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 |
Families Citing this family (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 |
| CN110739191B (en) * | 2018-07-20 | 2022-03-04 | 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1287151B1 (en) * | 1996-11-11 | 1998-08-04 | Abb Research Ltd | MAGNETIC ACTUATOR |
| CN2337668Y (en) * | 1998-03-11 | 1999-09-08 | 王光顺 | Permanent-magnetic operating mechanism for vacuum switch |
| CN101789318B (en) * | 2010-03-30 | 2012-05-23 | 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 |
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Cited By (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 |
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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 |