CN112366115A - Integrated electromagnetic repulsion mechanism with permanent magnet retaining device and buffer spring - Google Patents
Integrated electromagnetic repulsion mechanism with permanent magnet retaining device and buffer spring Download PDFInfo
- Publication number
- CN112366115A CN112366115A CN202011202728.4A CN202011202728A CN112366115A CN 112366115 A CN112366115 A CN 112366115A CN 202011202728 A CN202011202728 A CN 202011202728A CN 112366115 A CN112366115 A CN 112366115A
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- repulsion
- cover plate
- plate
- disc
- buffer spring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an integrated electromagnetic repulsion mechanism with a permanent magnet holding device and a buffer spring. The mechanism provides a new direction for the compact design of the electromagnetic repulsion mechanism, and is favorable for the further popularization of the electromagnetic repulsion mechanism in the field of switches.
Description
Technical Field
The invention relates to the technical field of rapid vacuum switches, in particular to an integrated electromagnetic repulsion mechanism with a permanent magnet holding device and a buffer spring.
Background
In recent years, with the continuous development of the power industry, the power grid scale in China is continuously enlarged, the vacuum switch is used as an important protection and control device in a power system, and the power system puts higher requirements on the action speed of the vacuum switch. The quick removal or isolation of the short-circuit fault of the power system can reduce the dynamic thermal stability impact of the short-circuit current on the system and equipment, thereby improving the safety and stability of the system operation. At present, the traditional operating mechanisms such as permanent magnets, springs, hydraulic pressure, pneumatics and motors are used as driving elements of the circuit breaker, and the requirement of a system for quickly cutting off short-circuit faults is gradually difficult to meet. The quick vacuum switch based on the electromagnetic repulsion mechanism has the advantage of quick short-circuit fault removal, can provide an effective solution for quick and reliable removal of system faults, and has wide application prospects in the aspects of fault current limiting, direct current on-off, voltage sag inhibition and the like.
Although the electromagnetic repulsion mechanism-based rapid vacuum switch can greatly reduce the time for removing faults and improve the operation safety and stability of a power system, the electromagnetic repulsion mechanism-based rapid vacuum switch still has a problem and limits further popularization and application. The position retaining device is applied to the electromagnetic repulsion mechanism, and no matter the bistable spring is retained or the permanent magnet is retained, the position retaining device is arranged above or below the electromagnetic repulsion mechanism, so that the position retaining device occupies a large space, is inconvenient to be matched with the electromagnetic repulsion mechanism, and is not beneficial to further popularization of the electromagnetic repulsion mechanism in the field of switches. And the repulsion that electromagnetic repulsion mechanism produced is very big, needs reasonable buffering to avoid the last repulsion dish of divide-shut brake and close coil, separating brake coil between the strong collision cause mechanical damage.
Generally speaking, the whole volume of the existing electromagnetic repulsion mechanism is large, the operation is inconvenient, the position holding device is not integrated with a repulsion plate and a closing coil opening coil into an integrated device in a good solving way at present, and the buffering problem of the electromagnetic repulsion mechanism at the last stage of closing and opening exists.
Disclosure of Invention
In order to solve the problems of large overall size and inconvenient operation of an electromagnetic repulsion mechanism and solve the problems of position keeping and buffering, the invention provides an integrated electromagnetic repulsion mechanism with a permanent magnet keeping device and a buffering spring. The electromagnetic repulsion unit, the position holding unit and the buffer unit are structurally integrated, so that the whole device is compact and simple and can be tightly matched with the electromagnetic repulsion mechanism.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated electromagnetic repulsion mechanism with a permanent magnet holding device and a buffer spring comprises a bolt 101, a guide end cover 201, a permanent magnet 202, an opening coil 301 and a closing coil 601 which are poured in epoxy resin 302, an upper cover plate 401, a support outer wall 402, a lower cover plate 403, a repulsion plate 501, the buffer spring 502 and a piston 503; the bolts 101 fix the guide end cover 201 on the upper cover plate 401 and the lower cover plate 403; the permanent magnet 202 is fixed in a groove between the guide end cover 201 and the upper cover plate 401 and the lower cover plate 403; the opening coil 301 poured by the epoxy resin 302 is fixed between the upper cover plate 401 and the repulsion plate 501 through the supporting outer wall 402; a closing coil 601 poured by epoxy resin 302 is fixed between the lower cover plate 403 and the repulsive force disc 501 through a support outer wall 402; the upper connecting rod of the repulsion plate 501 penetrates through the guide end cover 201 and is connected with a movable guide rod in the arc extinguishing chamber through an insulating pull rod, and the contact limit position of the upper cover plate 401 and the upper connecting rod of the repulsion plate 501 compresses a buffer spring 502 through a piston 503; similarly, the lower link of the repulsion plate 501 passes through the guide end cap 201 and is connected with the buffer through the insulation pull rod, and the contact limit position of the lower cover plate 403 and the lower link of the repulsion plate 501 compresses the buffer spring 502 through the piston 503.
The permanent magnet 202 is fixed in a groove between the guide end cover 201 and the upper cover plate 401 and the lower cover plate 403 in multiple layers to serve as a position retaining device; the buffer spring 502 and the piston 503 form a buffer device; the closing coil 601, the opening coil 301 and the repulsion disc 501 form an electromagnetic repulsion unit; the position holding device, the buffer device and the electromagnetic repulsion unit form an integrated integral structure, and the total volume of the electromagnetic repulsion mechanism is greatly reduced by reducing the space occupied by the position holding device of the electromagnetic repulsion mechanism; the permanent magnet 202 holds the repulsion disc 501 of the electromagnetic repulsion mechanism at the closing position or the opening position by the attraction force to the repulsion disc 501.
In the closing process, the action speed of the repulsion plate 501 is high, when the repulsion plate 501 reaches the limit point at the bottom end of the upper cover plate 401, the impact stress is large, the repulsion plate 501 is easily damaged, the buffer spring 502 is additionally arranged at the contact limit position of the upper end of the repulsion plate 501 and the upper cover plate 401, so that when the repulsion plate 501 reaches the limit point at the bottom end of the upper cover plate 401, the buffer spring 502 is compressed through the piston 503, the stress impact between the repulsion plate 501 and the limit point at the bottom end of the upper cover plate 401 is reduced, and the repulsion plate 501 and the upper cover plate 401 are protected; similarly, in the opening process, the repulsive disc 501 acts fast, when the repulsive disc reaches the limit point at the top end of the lower cover plate 403, the impact stress is large, the repulsive disc 501 is easily damaged, the buffer spring 502 is additionally arranged at the contact limit position of the lower end of the repulsive disc 501 and the lower cover plate 403, so that when the repulsive disc 501 reaches the limit point at the top end of the lower cover plate 403, the buffer spring 502 is compressed through the piston 503, the stress impact at the limit point between the repulsive disc 501 and the top end of the lower cover plate 403 is reduced, and the repulsive disc 501 and the lower cover plate 403 are protected.
The spring 502 is formed by a plurality of disc springs.
The guide end cover 201 is fixed on the upper cover plate 401 and the lower cover plate 403 through the bolt 101, the elastic pad 102 and the flat pad 103, the joint of the top end of the upper cover plate 401 and the bolt 101 is processed into an internal thread shape, and the joint of the bottom end of the lower cover plate 403 and the bolt 101 is processed into an internal thread shape, so that the guide end cover 201 can be fixed on the upper cover plate 401 and the lower cover plate 403, and plays a role in guiding the repulsion disc 501 in the closing and opening movement processes.
The repulsion plate 501 is made of aluminum alloy, and the upper end and the lower end of the repulsion plate are both processed into internal threads and are connected with the insulating pull rod through threads.
The guide end cover 201 is made of graphite or polytetrafluoroethylene and other magnetism isolating materials.
The invention has the beneficial effects that:
compared with the prior art, the electromagnetic repulsion mechanism has the advantages that the position holding device, the buffering device and the electromagnetic repulsion unit for the electromagnetic repulsion mechanism are combined into an integrated device, the opening and closing positions of the electromagnetic repulsion mechanism can be held, the final stage of the opening and closing can be effectively buffered, a new direction is provided for the compact design of the electromagnetic repulsion mechanism, and the electromagnetic repulsion mechanism is favorable for further popularization in the field of opening and closing.
Drawings
Fig. 1 is a closing bitmap of an integrated electromagnetic repulsion mechanism with a permanent magnet holding device and a buffer spring according to the present invention.
Fig. 2 is an enlarged top view of a guide end cap (201) of the integrated electromagnetic repulsion mechanism with permanent magnet holding device and buffer spring according to the present invention.
Fig. 3 is a top view of the interior of an integrated electromagnetic repulsion mechanism upper cover plate (401) with permanent magnet retention means and buffer springs in accordance with the present invention.
Wherein 101 is a bolt, 102 is an elastic pad, 103 is a flat pad, 201 is a guide end cover, 202 is a permanent magnet, 301 is a switching-off coil, 302 is epoxy resin, 401 is an upper cover plate, 402 is a support outer wall, 403 is a lower cover plate, 501 is a repulsion plate, 502 is a spring, and 503 is a piston.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings 1-3:
as shown in fig. 1-2 and 3, the present invention provides an integrated electromagnetic repulsion mechanism having a permanent magnet holding device and a buffer spring, comprising: 101 bolts, 102 elastic pads, 103 flat pads, 201 guide end covers, 202 permanent magnets, 301 opening coils, 302 epoxy resin, 401 upper cover plates, 402 supporting outer walls, 403 lower cover plates, 501 repulsive force discs, 502 springs and 503 pistons.
The permanent magnets 202 are fixed in the grooves between the guide end cover 201 and the upper cover plate 401 and the lower cover plate 403 in multiple layers to serve as position retaining devices; the buffer spring (502) and the piston (503) form a buffer device; the closing coil (601), the opening coil (301) and the repulsion disc (501) form an electromagnetic repulsion unit; the position holding device, the buffer device and the electromagnetic repulsion unit form an integrated integral structure together, and the total volume of the electromagnetic repulsion mechanism is greatly reduced by reducing the space occupied by the electromagnetic repulsion mechanism holding unit device.
Optionally, the permanent magnets 202 can be uniformly distributed in three layers in the grooves between the guide end cover 201 and the upper cover plate 401 and the lower cover plate 403, seven permanent magnets are placed on the outermost layer, six permanent magnets are placed on the middle layer, and four permanent magnets are placed on the innermost layer;
preferably, the repulsion disc 501 is made of an aluminum alloy material, the permanent magnet 202 forms a magnetic conduction loop when the repulsion disc 501 made of the aluminum alloy material reaches the closing position and the opening position, and forms a position-keeping attraction force for the repulsion disc 501 made of the aluminum alloy material, so that the repulsion disc 501 of the electromagnetic repulsion mechanism is kept at the closing position or the opening position.
In the closing process, the action speed of the repulsion disc 501 is high, when the repulsion disc reaches the limit point at the bottom end of the upper cover plate 401, the impact stress is large, the repulsion disc 501 is easily damaged mechanically, the buffer spring 502 is additionally arranged at the contact limit position of the upper end of the repulsion disc 501 and the upper cover plate 401, when the repulsion disc 501 reaches the limit point at the bottom end of the upper cover plate 401, the buffer spring 502 is compressed through the piston 503, the stress impact of the repulsion disc 501 and the limit point at the bottom end of the upper cover plate 401 is reduced, and the repulsion disc 501 and the upper cover plate 401 are protected.
Similarly, in the opening process, the repulsive disc 501 has high action speed, when the repulsive disc 501 reaches the limit point at the top end of the lower cover plate 403, the impact stress is large, the repulsive disc 501 is easily damaged mechanically, and a buffer spring 502 is added at the contact limit position of the lower end of the repulsive disc 501 and the lower cover plate 403, so that when the repulsive disc 501 reaches the limit point at the top end of the lower cover plate 403, the buffer spring 502 is compressed through a piston 503, the stress impact at the limit point between the repulsive disc 501 and the top end of the lower cover plate 403 is reduced, and the repulsive disc 501 and the lower cover plate 403 are protected;
preferably, the spring 502 is a multi-piece belleville spring apposition.
Preferably, the guide end cover 201 is fixed on the upper cover plate 401 and the lower cover plate 403 through bolts 101, elastic pads 102 and flat pads 103;
preferably, the guide end cover 201 is made of graphite or polytetrafluoroethylene material, and plays a role in lubricating and guiding the repulsion disc 501 in the closing and opening motion process; meanwhile, a magnetic conduction loop formed between the permanent magnet 202 and the repulsion disc 501 does not pass through the upper cover plate 401, the lower cover plate 403 and the upper and lower connecting rods of the repulsion disc 501, so that the magnetic isolation function is achieved; the permanent magnet 202 can be fixed in a groove between the upper cover plate 401 and the lower cover plate 403;
preferably, the joint of the top end of the upper cover plate 401 and the bolt 101 is processed into an internal thread shape, and the joint of the bottom end of the lower cover plate 403 and the bolt 101 is processed into an internal thread shape, so that the guide end cover 201 can be fixed on the upper cover plate 401 and the lower cover plate 403;
the upper end of a repulsion plate 501 of the electromagnetic repulsion driving unit is connected with a movable guide rod in the arc extinguishing chamber through an insulating pull rod, and the lower end of the repulsion plate is connected with a buffer;
preferably, the upper end and the lower end of the repulsion plate 501 of the electromagnetic repulsion driving unit are both processed into an internal thread shape, and the lower end of the insulation pull rod and the upper end of the buffer are processed into an external thread so as to be connected through the thread;
the opening coil 301 and the closing coil 601 are cast by materials with good wear resistance, corrosion resistance, electrical insulation and the like.
Preferably, the opening coil 301 and the closing coil 601 are cast by epoxy resin 302; the epoxy resin 302 is firmly combined with the coil, has a compact structure, has good characteristics of wear resistance, corrosion resistance, electric insulation and the like, ensures turn-to-turn insulation of the coil and mechanical reliability of the coil, reduces turn-to-turn spacing of the coil, increases the number of turns of the coil, and improves the output characteristic of a mechanism.
The opening coil 301 is fixed between the upper cover plate 401 and the repulsive force plate 501 through the supporting outer wall 402; the closing coil 601 is fixed between the lower cover plate 403 and the repulsive disc 501 through the support outer wall 402.
Claims (7)
1. An integrated electromagnetic repulsion mechanism with a permanent magnet holding device and a buffer spring is characterized by comprising a bolt (101), a guide end cover (201), a permanent magnet (202), a brake separating coil (301) and a brake closing coil (601) which are poured in epoxy resin (302), an upper cover plate (401), a support outer wall (402), a lower cover plate (403), a repulsion plate (501), the buffer spring (502) and a piston (503); the guide end cover (201) is fixed on the upper cover plate (401) and the lower cover plate (403) through the bolts (101); the permanent magnet (202) is fixed in a groove between the guide end cover (201) and the upper cover plate (401) and the lower cover plate (403); the opening coil (301) poured by epoxy resin (302) is fixed between the upper cover plate (401) and the repulsive force disc (501) through a supporting outer wall (402); a closing coil (601) poured by epoxy resin (302) is fixed between the lower cover plate (403) and the repulsion plate (501) through a supporting outer wall (402); an upper connecting rod of the repulsion plate (501) penetrates through a guide end cover (201) and is connected with a movable guide rod in an arc extinguishing chamber through an insulating pull rod, and a contact limiting position of an upper cover plate (401) and the upper connecting rod of the repulsion plate (501) compresses a buffer spring (502) through a piston (503); similarly, the lower connecting rod of the repulsion plate (501) penetrates through the guide end cover (201) and is connected with the buffer through the insulating pull rod, and the contact limit position of the lower cover plate (403) and the lower connecting rod of the repulsion plate (501) compresses the buffer spring (502) through the piston (503).
2. An integrated electromagnetic repulsion mechanism with permanent magnet retention means and buffer springs according to claim 1 characterized in that said permanent magnets (202) are fixed in multiple layers in the grooves between the guiding end cap (201) and the upper cover plate (401) and the lower cover plate (403) as position retention means; the buffer spring (502) and the piston (503) form a buffer device; the closing coil (601), the opening coil (301) and the repulsion disc (501) form an electromagnetic repulsion unit; the position holding device, the buffer device and the electromagnetic repulsion unit form an integrated integral structure, and the total volume of the electromagnetic repulsion mechanism is greatly reduced by reducing the space occupied by the position holding device of the electromagnetic repulsion mechanism; the permanent magnet (202) keeps the repulsion disc (501) of the electromagnetic repulsion mechanism at a closing position or an opening position through the attraction force to the repulsion disc (501).
3. The integrated electromagnetic repulsion mechanism with the permanent magnet retaining device and the buffer spring according to claim 1 is characterized in that in the closing process, the repulsion disc (501) has high action speed, when the repulsion disc reaches the limit point of the bottom end of the upper cover plate (401), the impact stress is large, the repulsion disc (501) is easily damaged, the buffer spring (502) is added at the contact limit position of the upper end of the repulsion disc (501) and the upper cover plate (401), so that when the repulsion disc (501) reaches the limit point of the bottom end of the upper cover plate (401), the buffer spring (502) is compressed through the piston (503), the stress impact of the repulsion disc (501) and the limit point of the bottom end of the upper cover plate (401) is reduced, and the repulsion disc (501) and the upper cover plate (401) are protected; similarly, in the opening process, the action speed of the repulsion plate (501) is high, when the repulsion plate reaches the limit point at the top end of the lower cover plate (403), the impact stress is large, the repulsion plate (501) is easily damaged, the buffer spring (502) is additionally arranged at the contact limit position of the lower end of the repulsion plate (501) and the lower cover plate (403), so that when the repulsion plate (501) reaches the limit point at the top end of the lower cover plate (403), the buffer spring (502) is compressed through the piston (503), the stress impact at the limit point at the top ends of the repulsion plate (501) and the lower cover plate (403) is reduced, and the repulsion plate (501) and the lower cover plate (403) are protected.
4. An integrated electromagnetic repulsion mechanism with permanent magnet retention means and buffer springs as in claim 1, characterized by said springs (502) being involuted with multiple disc springs.
5. The integrated electromagnetic repulsion mechanism with the permanent magnet retaining device and the buffer spring according to claim 1, characterized in that the guide end cover (201) is fixed on the upper cover plate (401) and the lower cover plate (403) through the bolt (101), the elastic pad (102) and the flat pad (103), the joint of the top end of the upper cover plate (401) and the bolt (101) is processed into an internal thread shape, the joint of the bottom end of the lower cover plate (403) and the bolt (101) is processed into an internal thread shape, so that the guide end cover (201) can be fixed on the upper cover plate (401) and the lower cover plate (403), and the repulsion disc (501) is guided in the closing and opening motion process.
6. The integrated electromagnetic repulsion mechanism with permanent magnet holding device and buffer spring as claimed in claim 1, wherein the repulsion disk (501) is made of aluminum alloy, and its upper and lower ends are both processed into internal thread and connected with the insulated pull rod through thread.
7. An integrated electromagnetic repulsion mechanism with permanent magnetic holding means and buffer springs according to claim 1 characterized in that said guiding end caps (201) use graphite or teflon spacer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202728.4A CN112366115B (en) | 2020-11-02 | 2020-11-02 | Integrated electromagnetic repulsion mechanism with permanent magnet retaining device and buffer spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011202728.4A CN112366115B (en) | 2020-11-02 | 2020-11-02 | Integrated electromagnetic repulsion mechanism with permanent magnet retaining device and buffer spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112366115A true CN112366115A (en) | 2021-02-12 |
| CN112366115B CN112366115B (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011202728.4A Active CN112366115B (en) | 2020-11-02 | 2020-11-02 | Integrated electromagnetic repulsion mechanism with permanent magnet retaining device and buffer spring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113436941A (en) * | 2021-06-24 | 2021-09-24 | 西安西电开关电气有限公司 | Electromagnetic repulsion mechanism for quick switch and opening and closing buffering method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002124161A (en) * | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switchgear |
| CN102800506A (en) * | 2012-08-19 | 2012-11-28 | 中国船舶重工集团公司第七一二研究所 | Permanent-magnet rapid operation mechanism |
| EP3113201A1 (en) * | 2014-02-27 | 2017-01-04 | Kabushiki Kaisha Toshiba | Switch operation mechanism |
| CN106783258A (en) * | 2017-01-23 | 2017-05-31 | 天津平高智能电气有限公司 | Switching device and the high-speed switch using the device |
| CN110993381A (en) * | 2019-12-16 | 2020-04-10 | 西安交通大学 | Gas buffering structure with automatic pressure relief function for electromagnetic repulsion mechanism and working method |
-
2020
- 2020-11-02 CN CN202011202728.4A patent/CN112366115B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002124161A (en) * | 2000-10-16 | 2002-04-26 | Mitsubishi Electric Corp | Switchgear |
| CN102800506A (en) * | 2012-08-19 | 2012-11-28 | 中国船舶重工集团公司第七一二研究所 | Permanent-magnet rapid operation mechanism |
| EP3113201A1 (en) * | 2014-02-27 | 2017-01-04 | Kabushiki Kaisha Toshiba | Switch operation mechanism |
| CN106783258A (en) * | 2017-01-23 | 2017-05-31 | 天津平高智能电气有限公司 | Switching device and the high-speed switch using the device |
| CN110993381A (en) * | 2019-12-16 | 2020-04-10 | 西安交通大学 | Gas buffering structure with automatic pressure relief function for electromagnetic repulsion mechanism and working method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113436941A (en) * | 2021-06-24 | 2021-09-24 | 西安西电开关电气有限公司 | Electromagnetic repulsion mechanism for quick switch and opening and closing buffering method thereof |
| CN113436941B (en) * | 2021-06-24 | 2023-04-25 | 西安西电开关电气有限公司 | Electromagnetic repulsion mechanism for quick switch and switching-on/off buffering method thereof |
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| Publication number | Publication date |
|---|---|
| CN112366115B (en) | 2022-03-22 |
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