CN2886785Y - Permanent magnet opening/closing device - Google Patents
Permanent magnet opening/closing device Download PDFInfo
- Publication number
- CN2886785Y CN2886785Y CN 200520147440 CN200520147440U CN2886785Y CN 2886785 Y CN2886785 Y CN 2886785Y CN 200520147440 CN200520147440 CN 200520147440 CN 200520147440 U CN200520147440 U CN 200520147440U CN 2886785 Y CN2886785 Y CN 2886785Y
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- CN
- China
- Prior art keywords
- end cap
- switch
- iron core
- permanent magnet
- moving iron
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to activation field of switch, characterized in that the switch comprises a permanent magnet, an end cap, two bases located on the upper and down end face, a top bar that crosses the end cap and a remote iron core that in vertical extrusion state with top bar when the switch on and off. Said four parts are formed permanent-magnetic flux which comprises closed loop circuit with direct-current drove magnetic flux. When the two fluxes are in same direction, the composed magnetic force pushes the top bar to drive the top board lift and switch on. When the two fluxes are in different directions, the composed magnetic force decreases, and the switching off spring connected between the end cap and base drives the top board drop to make the switch off. The length of travel of the switch is the slack length between the end cap and remote iron core. The utility model has the advantages of that it can switch off fast and it is simple in structure, convenient in magnetic charging and cheap.
Description
Technical field
The utility model belongs to switch folding control technology field, relates in particular to the folding driving mechanism of power high voltage switch.
Background technology
Traditional operating mechanism is that geared system makes spring stretching energy storage again with motor driven set of gears device in the power high voltage switchgear, and divide-shut brake releases energy spring after being stretched by dropout and realizes.This mechanism element is many, complex structure, and the manufacturing cost height, poor reliability, useful life is short, divides, closing speed is slow, can not adapt to the requirement of power automation.Though traditional electromagnetic operating mechanism is simple owing to "on" position need be kept by electromagnetic force, so power consumption is big.And long-time energising can make coil heating, so reliability is low, useful life is short.The appearance of permanent magnet mechanism, and, greatly improved the reliability of power high voltage switchgear as operating mechanism, prolonged useful life, reduced manufacturing cost.Permanent magnet mechanism makes branch, closing speed controlled, can satisfy the requirement of power automation fully.
Permanent magnet mechanism has two kinds of forms according to the difference when the sub-switching operation.That is: operate preceding a kind of bistable state of crying, a kind of monostable of crying in back according to the tension spring restoring force that the relies on electromagnetism actuating and main.When closing a floodgate, the permanent magnet mechanism of two kinds of forms all uses Electromagnetically-operating.Opening and closing state keeps all leaning on permanent magnetism power to realize.In the bistable permanent magnet mechanism, mainly contain permanent magnet, switching winding, closing coil, moving iron core, closed respectively, switching winding passes to the both forward and reverse directions direct current, moving iron core just can be finished combined floodgate or separating brake.Mainly contain permanent magnet, coil in the Monostable permanent magnetic mechanism, tripping spring, during combined floodgate, add direct current to coil, the magnetic line of force direction that electric current is produced is consistent with permanent magnet magnetic line of force direction, under the acting in conjunction of electromagnetic force and permanent magnetism power, moving iron core is finished combined floodgate fast, and tripping spring is stretched and accumulation of energy simultaneously.During separating brake, rightabout direct current when adding with combined floodgate to coil, the electromagnetic force of generation is offset permanent magnetism power, and at this moment moving iron core is finished separating brake rapidly under the effect of spring restoring force.
Existing monostable, bistable-state permanent magnet mechanism mostly are used for power high voltage switch and contactor.This class permanent magnet mechanism is less as other purposes.
By retrieval and look into newly, not seeing has the permanent magnet mechanism identical with the utility model.Existing bistable-state permanent magnet mechanism just-off speed (moving iron core leaves the speed of end point of travel) is little, and moving iron core is big to the impulsive force of end plate, and this is by due to its structure and the operation principle.And high-voltage switch gear requires contact (the moving iron core by permanent magnet mechanism drives) that higher just-off speed is arranged.Monostable permanent magnetic mechanism can satisfy this requirement well, and moving iron core is little to the end plate impulsive force during separating brake.Existing Monostable permanent magnetic mechanism has two kinds as shown in Figure 1 and Figure 2, and permanent magnet mechanism shown in Figure 1 is changed and got by bistable mechanism, and mechanism shown in Figure 2 is so-called separation magnetic circuit formula permanent magnet mechanism.At Fig. 1, in the mechanism shown in Figure 2, magnet all requires radial magnetizing.Realize radial magnetizing, technical difficulty is big, the cost height.At present, mostly adopt the tile magnet on the engineering, magnetize along thickness direction, then several tile magnet combination are become cylindric, what the direction of magnetization of this cylinder-shaped magnet can only be similar to thinks radially.
Summary of the invention
The purpose of this utility model is to provide a kind of simple and reliable driving and state maintaining body---novel permanent magnetic closing device for power high voltage switch, power contactor and other two stations equipment.
The utility model relates to a kind of permanent magnet mechanism."on" position relies on permanent magnetism to try hard to keep and holds, and gate-dividing state is kept by permanent magnetism power and tension spring pretension.Switch to "on" position from gate-dividing state and add the electromagnetic force startup, start common driving of back electromagnetic force and permanent magnetism power and finish combined floodgate; Switch to gate-dividing state from "on" position and add the electromagnetic force startup, mainly finish separating brake after the startup by electromagnetic force and spring restoring force.Operation and state that this mechanism is applied to the power high voltage switch keep, and also can be used for the device of similar requirement.
Of the present utility model being characterised in that, this device contains:
The top board 19 of band drive rod 5, described drive rod 5 is connected with driven switch;
After passing, stainless steel push rod 11, top be fixed on the bottom surface of top board 19 below end cap 10;
The plate shape Nd-Fe-B permanent magnet 14 that thickness direction magnetizes is between the upper surface of the bottom surface of end cap 10 and base 12;
Moving iron core 17 is made with magnetic material, and when separating brake or combined floodgate, the lower surface of the upper surface of this moving iron core 17 and stainless steel push rod 11 is in the mutual extrusion state all the time;
Tripping spring 20, two ends are connected between top board 19 and the base 12;
Connect cylinder 16, between end cap 10 and base 12, play interconnect function.
Described push rod 11 has two, is distributed in the and arranged on left and right sides of end cap 10 symmetrically.
Between described coil 15 and end cap 10, permanent magnet 14, base 12, a bobbin 18 with nonmagnetic substance system is arranged.
Experimental results show that: when giving coil respectively, can observe directly and successfully close a floodgate and the separating brake process repeatedly by the both forward and reverse directions direct current.
Description of drawings
Fig. 1 Monostable permanent magnetic mechanism
A) making process gate-dividing state d separating brake process c "on" position b)))
1-fixed core 2-moves 3-operating coil 4-permanent magnet 5-drive rod unshakable in one's determination
6-lower magnetic pole 7-goes up magnetic pole
III-combined floodgate exciting current magnetic field, I-magnetic field of permanent magnet II-separating brake exciting current magnetic field
Fig. 2 separates magnetic circuit permanent magnetic mechanism
A) separating brake process "on" position d making process c gate-dividing state b)))
1-fixed core 2-moves 4-permanent magnet 8-closing coil 9-switching winding unshakable in one's determination
III-combined floodgate exciting current magnetic field, I-magnetic field of permanent magnet II-separating brake exciting current magnetic field
One of Fig. 3 permanent magnetism closing device of the present invention structural representation: "on" position;
Two of Fig. 4 permanent magnetism closing device of the present invention structural representation: gate-dividing state;
In Fig. 3 and Fig. 4:
10. end cap 11. stainless steel push rods 12. mild steel cup dollies
13. stainless steel (1Cr18Ni9Ti) pad 14. plate shape Nd-Fe-B permanent magnets magnetize along thickness direction
15. coil 16. stainless steels connect the moving iron core of cylinder 17. mild steel
18. aluminium or the 20. separating brake extension springs of nonmetal coil frame 19. top boards
Embodiment
During separating brake, see Fig. 3, rightabout direct current when leading to combined floodgate for coil 15, the electromagnetism magnetic line of force of generation is II, opposite with permanent-magnet line I direction, permanent magnetism the suction-combining force between therefore moving iron core 17 and the end cap 10 is weakened, and when electromagnetic force was equal to or greater than permanent magnetism power, moving iron core 17 was under tripping spring 20 tension, move downward cushion block 13 rapidly, coil 15 outages immediately, moving iron core 11 remains on the cushion block 13 under tripping spring 20 pretensions and permanent-magnet effect, and separating brake is finished.
Among Fig. 4, I is the permanent-magnet line.During combined floodgate, give coil 15 logical direct currents, the electromagnetic field direction that produces in the stroke gap is identical with the permanent magnetic field direction, and its magnetic line of force is shown in II among Fig. 4.Magnetic strength density in the gap is that the stack of electromagnetic field and permanent magnetic field forms, when the magnetic strength density in the gap reaches certain value, and the attraction of generation, iron core 17 is moved upward, through end cap 10 closes a floodgate, coil 15 outages immediately, moving iron core 17 by permanent magnetism power sticking in end cap 10.Combined floodgate is finished, and tripping spring 20 is stretched and energy storage simultaneously, for separating brake is got ready.
This closing device (seeing Fig. 3 or Fig. 4) simple in structure.Permeability magnetic material is selected cheap mild steel (A3 steel, No. 10 steel or No. 20 steel), and permanent magnet is selected NdFeB material for use, is designed to discoideusly, magnetizes along thickness (axis) direction, manufacturing process is simple, and during making, waste material is few, this mechanism manufacturing cost is little, and the overall structure rigidity is strong, uses more reliable.Magnet can magnetize and also is easier to carry out after equipment in this mechanism, this for manufacturing bigger provide very big technology facility with magnetic mechanism.
Claims (3)
1, the permanent magnetism closing device is characterized in that, this device contains:
The top board (19) of band drive rod (5), described drive rod (5) is connected with driven switch;
End cap (10) is made with magnetic material, and this end cap (10) is positioned under the described top board (19);
After passing, stainless steel push rod (11), top be fixed on the bottom surface of top board (19) below end cap (10);
Base (12) is made with magnetic material;
The plate shape Nd-Fe-B permanent magnet (14) that thickness direction magnetizes is positioned between the upper surface of the bottom surface of end cap (10) and base (12);
Moving iron core (17) is made with magnetic material, and when separating brake or combined floodgate, the lower surface of the upper surface of this moving iron core (17) and stainless steel push rod (11) is in the mutual extrusion state all the time;
Tripping spring (20), two ends are connected between top board (19) and the base (12);
Coil (15), input is connected the sense of current and size all allows on the DC power supply of variation, the direct current flux that this coil (15) produces passes through the gap between described base (12), permanent magnet (14), end cap (10), end cap (10) lower surface and the moving iron core (17), moving iron core (17) successively, returns base (12) and forms closed magnetic circuit; Under "on" position, the direction of the direct current flux of this coil (15) is identical with the flow direction of permanent magnet (14), the formed magnetic force that closes promotes stainless steel push rod (11) upwards by moving iron core (17), driving top board (19) closes described switch, after turn-offing the described DC power supply on the switch-on coil (15), the magnetic flux that is produced by permanent magnet (14) continues to keep described magnetic circuit closure and permanent magnetism power makes switch keeping in "on" position, make tripping spring (20) be in extended state simultaneously, when giving coil (15) by rightabout direct current when closing a floodgate, coil (15) produces the DC driven magnetic flux opposite with the flow direction of permanent magnet (14), permanent magnet flux is weakened, until permanent magnetism power during less than spring tension, make switch finish separating brake, disconnect DC power supply immediately, under the pulling force and the acting in conjunction of permanent magnetism power of tripping spring (20), the switch keeping gate-dividing state;
Cushion block (13), be positioned between moving iron core (17) and the base (12), the height of this cushion block (13) should be a switch over travel greater than the gap between end cap (10) lower surface and moving iron core (17) upper surface, so that moving iron core (17) is lived in push rod (11) extruding, reduce the leakage field between moving iron core (17) and the base (12) simultaneously;
Connect cylinder (16), be positioned between end cap (10) and the base (12) and play interconnect function.
2, permanent magnetism closing device according to claim 1 is characterized in that: described push rod (11) has two, is distributed in the and arranged on left and right sides of end cap (10) symmetrically.
3, permanent magnetism closing device according to claim 1 is characterized in that: between described coil (15) and end cap (10), permanent magnet (14), base (12) bobbin with nonmagnetic substance system (18) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520147440 CN2886785Y (en) | 2005-12-30 | 2005-12-30 | Permanent magnet opening/closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520147440 CN2886785Y (en) | 2005-12-30 | 2005-12-30 | Permanent magnet opening/closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2886785Y true CN2886785Y (en) | 2007-04-04 |
Family
ID=37961871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520147440 Expired - Fee Related CN2886785Y (en) | 2005-12-30 | 2005-12-30 | Permanent magnet opening/closing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2886785Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728053A (en) * | 2008-10-21 | 2010-06-09 | 杨晟 | Bistable electromagnetic driver and product with the same |
| CN102535294A (en) * | 2010-12-20 | 2012-07-04 | 刘新广 | Electricity-generating floor tile |
-
2005
- 2005-12-30 CN CN 200520147440 patent/CN2886785Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728053A (en) * | 2008-10-21 | 2010-06-09 | 杨晟 | Bistable electromagnetic driver and product with the same |
| CN102535294A (en) * | 2010-12-20 | 2012-07-04 | 刘新广 | Electricity-generating floor tile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20100201 |