CN109659200B - Permanent magnet type magnetic latching mechanism - Google Patents
Permanent magnet type magnetic latching mechanism Download PDFInfo
- Publication number
- CN109659200B CN109659200B CN201811583141.5A CN201811583141A CN109659200B CN 109659200 B CN109659200 B CN 109659200B CN 201811583141 A CN201811583141 A CN 201811583141A CN 109659200 B CN109659200 B CN 109659200B
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- pull rod
- shell
- self
- armature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/01—Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
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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
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
-
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
Abstract
The invention discloses a permanent magnet type magnetic latching mechanism, which comprises a permanent magnet mechanism, an armature mechanism and a self-balancing pull rod buffer mechanism, wherein the permanent magnet mechanism comprises a magnetic shell, a permanent magnet, an iron core and a tripping coil which are arranged in the magnetic shell, the armature mechanism comprises a closing armature and a housing of a contactor closing electromagnet, and the self-balancing pull rod buffer mechanism comprises a pull rod, a buffer spring and an electromagnet angle plate. The invention adopts the permanent magnetic force as the self-locking maintaining force, does not need long-term power supply, and is energy-saving and efficient; the adopted parts are few, the structure is simple, the cost is low, the abrasion is avoided, and the service life is long and the maintenance is avoided; the adoption of the frameless coil avoids the risk that the opening coil cannot be opened and the opening coil burns out to cause fire; the self-balancing pull rod with small swing and buffer functions is adopted, so that the self-balancing pull rod can automatically balance when being sucked with the armature, manual debugging is not needed, and the reliability is high; the armature structure with the housing is adopted, so that foreign matters are prevented from entering the attraction surface of the permanent magnet, the protection level is improved, and the failure of the closing self-closing lock is avoided.
Description
Technical Field
The invention relates to the technical field of vacuum contactors, in particular to a permanent magnet type magnetic latching mechanism.
Background
At present, the control modes used by the vacuum contactor comprise two types of electromagnetic maintenance and mechanical self-locking maintenance. The service life of the mechanical self-locking device generally determines the service life of the whole vacuum contactor, but the maintenance-free service life of the vacuum contactor with the self-locking function, which is common in the existing market, is not longer than 10 ten thousand times, a half-shaft snap-type locking mechanism is generally adopted, and a half shaft is driven by a tripping electromagnet to rotate to trip the opening during opening. Because the locking mechanical structure is complicated, the abrasion resistance, stability and protection level are low, the breaking action of the contactor is easy to fail and can not be powered off, and the breaking tripping coil is often burnt out to fail, so that even an electric fire disaster can be caused, and larger loss is brought to a user.
Disclosure of Invention
In order to overcome the defects, the invention provides a permanent magnet type magnetic latching mechanism which is simple in structure, small in size, higher in reliability, free from maintenance for life and long in service life up to 100 ten thousand times.
The technical scheme adopted by the invention for solving the technical problems is as follows: the permanent magnet type magnetic latching mechanism comprises a permanent magnet mechanism, an armature mechanism and a self-balancing pull rod buffer mechanism, wherein the permanent magnet mechanism comprises a magnetic shell, a permanent magnet, an iron core and a tripping coil which are arranged in the magnetic shell, and the magnetic shell is of a tank structure with one side open; one side surface of the permanent magnet is arranged at the bottom of the magnetic shell, and the other side surface is attached to the iron core; the tripping coil is wound on the outer circle of the iron core; the armature mechanism comprises a closing armature of a closing electromagnet of the contactor and a housing, the closing armature is arranged on an electromagnet rotating shaft of the contactor, the housing is fixed on the closing armature and is arranged opposite to the opening direction of the magnetic shell, and the housing can be covered on the opening surface of the magnetic shell when closing and locking; the self-balancing pull rod buffer mechanism comprises a pull rod, a buffer spring and an electromagnet angular plate, wherein the electromagnet angular plate is provided with the permanent magnet type magnetic latching mechanism, one end of the pull rod penetrates through a mounting hole in the electromagnet angular plate, the other end of the pull rod is fixedly connected with the magnetic shell, and the buffer spring is sleeved on the pull rod, is positioned between the electromagnet angular plate and the magnetic shell and is always in a compressed state.
As a further improvement of the invention, the magnetic shell and the cover shell are respectively flat-bottom round tank bodies made of pure iron, the radius of the cover shell is larger than that of the magnetic shell, and the length of the cover shell can cover the magnetic shell in a brake-separating state.
As a further improvement of the invention, the tripping coil is a frameless coil which is directly processed and wound on the outer circular surface of the iron core.
As a further improvement of the invention, a wire slot is processed on the outer circular surface of the iron core, and the tripping coil is wound in the wire slot.
As a further improvement of the invention, the axes of the magnetic shell, the permanent magnet, the iron core and the trip coil are collinear.
As a further improvement of the invention, one end of the pull rod is in floating connection with the electromagnet angular plate.
As a further improvement of the invention, the tripping coil is electrified when the contactor needs to be opened, the electrified state is direct current and the inherent polarity can not be reversely electrified.
As a further improvement of the invention, the tripping coil is powered by a pulse mode of 0.1-1 second when being electrified.
As a further improvement of the invention, the other end of the pull rod passes through the iron shell and the permanent magnet and is fixed with the iron core through threads.
The beneficial effects of the invention are as follows: the permanent magnetic force is adopted as the self-locking maintaining force, long-term power supply is not needed, and the energy is saved and the efficiency is high; the adopted parts are few, the structure is simple, the cost is low, the abrasion is avoided, and the service life is long and the maintenance is avoided; when the circuit control fault can not normally open the brake, the tripping coil can not be powered off to generate heat, at the moment, the heat is quickly transferred to the permanent magnet, when the temperature exceeds the working temperature of the permanent magnet, the magnetic force of the permanent magnet is reduced, the maintenance force is automatically reduced to the point that the self-locking can not be realized, and at the moment, the contactor is automatically opened, so that the risks of incapability of opening the brake and burning and igniting of the opening coil are avoided; the self-balancing pull rod with small swing and buffer functions is adopted, so that the self-balancing pull rod can automatically balance when being sucked with the armature, manual debugging is not needed, and the reliability is high; the armature structure with the housing is adopted, so that foreign matters are prevented from entering the attraction surface of the permanent magnet, the protection level is improved, and the failure of the closing self-closing lock is avoided.
Drawings
FIG. 1 is a schematic diagram of a closing latch state structure according to the present invention;
fig. 2 is a schematic diagram of a structure of a release state of a brake according to the present invention.
The following description is made with reference to the accompanying drawings:
1, an electromagnet rotating shaft; 11-magnetic shell;
12-permanent magnet; 13-iron core;
14—trip coil; 21-closing armature;
22-a housing; 31—a tie rod;
32—a buffer spring; 33-electromagnet corner plate.
Detailed Description
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The scope of the invention is not limited to the following examples, but is intended to be limited only by the appended claims and the equivalents and modifications thereof, which fall within the scope of the invention.
Referring to fig. 1-2, a permanent magnet type magnetic latching mechanism according to the present invention includes a permanent magnet mechanism, an armature mechanism, and a self-balancing pull rod buffer mechanism.
The permanent magnet mechanism comprises a magnetic shell 11, a permanent magnet 12, an iron core 13 and a tripping coil 14, wherein the permanent magnet 12, the iron core 13 and the tripping coil 14 are arranged in the magnetic shell (1), the magnetic shell 11 is of a flat-bottom round tank structure with one surface open, one side surface of the permanent magnet 12 is arranged at the bottom of the magnetic shell 11, the other side surface is attached to the iron core 13, and the tripping coil 14 is an boneless coil and is directly wound in a wire slot processed on the outer circle of the iron core 13.
The armature mechanism comprises a closing armature 21 and a housing 22 of a closing electromagnet of the contactor, the closing armature 21 is arranged on an electromagnet rotating shaft 1 of the contactor, the housing 22 is fixed on the closing armature 21 and is arranged opposite to the opening direction of the magnetic shell 11, the housing 22 is a flat-bottom round tank body consistent with the magnetic shell 11, the diameter of the housing 22 is larger than that of the magnetic shell 11, and the housing 22 is ensured not to interfere with the magnetic shell during movement. The length of the housing 22 is such that it will still cover the magnetic housing in the open state and prevent foreign matter from entering the core engaging plane.
The self-balancing pull rod buffer mechanism comprises a pull rod 31, a buffer spring 32 and an electromagnet angular plate 33 for installing the whole permanent magnet type magnetic latching mechanism, and one end of the pull rod 31 penetrates through an installation hole on the electromagnet angular plate 33 and is in floating connection with the electromagnet angular plate 33. The other end of the pull rod is fixedly connected with the magnetic shell 11, penetrates through the iron shell and the permanent magnet and is fixed with the iron core through threads. Preferably, the axes of the magnetic shell 11, the permanent magnet 12, the iron core 13 and the trip coil 14 are arranged in line. The buffer spring 32 is sleeved on the pull rod, is positioned between the electromagnet corner plate 33 and the magnetic shell 11, and is always in a compressed state.
The magnetic shell, the housing and the iron core are all made of electrician pure iron. After the integral installation, the end face of the iron core is flush with the end face of the magnetic shell, so that a good attraction surface is formed.
The pull rod is in floating connection with the electromagnet angle plate, and the length of the pull rod can be adjusted. Under the supporting force of the buffer spring, the permanent magnet mechanism can keep a horizontal state and swing with small amplitude.
The tripping coil is electrified only when the vacuum contactor needs to be disconnected, the electrified state is direct current and has fixed polarity, the electrified state is not reversely electrified, the electrified time length adopts a pulse mode of 0.1-1 seconds, or other travel switches can be adopted to supply power in a self-power-off mode.
The permanent magnet is a neodymium iron boron permanent magnet with the temperature of 100 ℃, and the tripping coil is wound by polyester enameled wires with the temperature resistance level of 155 ℃. When the circuit control fault can not normally switch off, the tripping coil can not be powered off to generate heat, at the moment, the heat is quickly transferred to the permanent magnet, when the temperature exceeds the working temperature of the permanent magnet, the magnetic force of the permanent magnet is reduced, the maintenance force is automatically reduced to the state that the self-locking can not be realized, and at the moment, the contactor is automatically switched off. Thereby avoiding the risk of incapability of opening the gate and burning of the opening coil for ignition.
When the vacuum contactor is closed and self-locked, the armature drives the housing to rotate until the housing contacts with the iron core, the housing is attracted and kept with the permanent magnet mechanism under the attraction of the permanent magnet force, and the contactor is always kept in a closing state under the limitation of the pull force of the pull rod, so that the self-locking function is formed.
The pull rod can swing a small margin, and the buffer spring can buffer the impact at the suction moment. Because the attraction end face can swing slightly, when the attraction end face is attracted with the armature, the attraction end face can be automatically balanced under the action of magnetic force, manual debugging is not needed, and the reliability is high.
Therefore, the invention adopts the permanent magnetic force as the self-locking maintaining force, long-term power supply is not needed, and the energy is saved and the efficiency is high; the adopted parts are few, the structure is simple, the cost is low, the abrasion is avoided, and the service life is long and the maintenance is avoided; when the circuit control fault can not normally open the brake, the tripping coil can not be powered off to generate heat, at the moment, the heat is quickly transferred to the permanent magnet, when the temperature exceeds the working temperature of the permanent magnet, the magnetic force of the permanent magnet is reduced, the maintenance force is automatically reduced to the point that the self-locking can not be realized, and at the moment, the contactor is automatically opened, so that the risks of incapability of opening the brake and burning and igniting of the opening coil are avoided; the self-balancing pull rod with small swing and buffer functions is adopted, so that the self-balancing pull rod can automatically balance when being sucked with the armature, manual debugging is not needed, and the reliability is high; the armature structure with the housing is adopted, so that foreign matters are prevented from entering the attraction surface of the permanent magnet, the protection level is improved, and the failure of the closing self-closing lock is avoided.
Claims (8)
1. A permanent magnet type magnetic latching mechanism, which is characterized in that: the self-balancing pull rod buffer mechanism comprises a permanent magnet mechanism, an armature mechanism and a self-balancing pull rod buffer mechanism, wherein the permanent magnet mechanism comprises a magnetic shell (11), a permanent magnet (12), an iron core (13) and a tripping coil (14) which are arranged in the magnetic shell (11), and the magnetic shell (11) is of a tank structure with one side open; one side surface of the permanent magnet (12) is arranged at the bottom of the magnetic shell (11), and the other side surface is attached to the iron core (13); the tripping coil (14) is wound on the outer circle of the iron core (13); the armature mechanism comprises a closing armature (21) and a housing (22) of a closing electromagnet of the contactor, the closing armature (21) is arranged on an electromagnet rotating shaft (1) of the contactor, the housing (22) is fixed on the closing armature (21) and is opposite to the opening direction of the magnetic shell (11), and the housing (22) can be covered on the opening surface of the magnetic shell (11) during closing and locking; the self-balancing pull rod buffer mechanism comprises a pull rod (31), a buffer spring (32) and an electromagnet angle plate (33) for installing the permanent magnet type magnetic latching mechanism, one end of the pull rod penetrates through an installation hole on the electromagnet angle plate (33), the other end of the pull rod is fixedly connected with the magnetic shell (11), the buffer spring (32) is sleeved on the pull rod and is positioned between the electromagnet angle plate (33) and the magnetic shell (11) and is always in a compressed state, the tripping coil (14) is electrified when the contactor needs to be opened, the electrified is direct current and has inherent polarity and cannot be reversely electrified, when the contactor is closed and self-locked, the armature drives the housing to rotate until the housing contacts with the iron core, the housing is attracted and kept with the permanent magnet type magnetic mechanism under the attraction of permanent magnet force, and the contactor is always kept in a closed state under the limitation of the pulling force of the pull rod.
2. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: the magnetic shell (11) and the cover shell (22) are respectively flat-bottom round tank bodies made of pure iron, the radius of the cover shell (22) is larger than that of the magnetic shell (11), and the length of the cover shell (22) can cover the magnetic shell (11) in a brake-separating state.
3. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: the tripping coil (14) is a frameless coil and is directly processed and wound on the outer circular surface of the iron core (13).
4. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: a wire groove is formed in the outer circular surface of the iron core (13), and the tripping coil (14) is wound in the wire groove.
5. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: the axes of the magnetic shell (11), the permanent magnet (12), the iron core (13) and the tripping coil (14) are collinear.
6. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: one end of the pull rod is in floating connection with the electromagnet angle plate (33).
7. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: the tripping coil (14) is powered by a pulse mode of 0.1-1 second.
8. The permanent magnet type magnetic latching mechanism according to claim 1, wherein: the other end of the pull rod penetrates through the iron shell and the permanent magnet and is fixed with the iron core through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583141.5A CN109659200B (en) | 2018-12-24 | 2018-12-24 | Permanent magnet type magnetic latching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583141.5A CN109659200B (en) | 2018-12-24 | 2018-12-24 | Permanent magnet type magnetic latching mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109659200A CN109659200A (en) | 2019-04-19 |
| CN109659200B true CN109659200B (en) | 2023-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811583141.5A Active CN109659200B (en) | 2018-12-24 | 2018-12-24 | Permanent magnet type magnetic latching mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN109659200B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863515B (en) * | 2020-06-19 | 2022-07-22 | 晨诺电气科技集团有限公司 | Vacuum contactor's explosion chamber contact piece emergency treatment device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564290A (en) * | 2004-03-30 | 2005-01-12 | 扬中市中金电器设备有限公司 | Permanent-magnet double steady-state contactor |
| CN201274237Y (en) * | 2007-11-19 | 2009-07-15 | 雷民主 | Permanent magnet lock type circuit breaker operation mechanism without friction obstacle during switching on and switching off |
| CN104282508A (en) * | 2014-10-13 | 2015-01-14 | 浙江正泰电器股份有限公司 | Electromagnetic tripping device with tripping mechanism |
| CN104851749A (en) * | 2015-05-07 | 2015-08-19 | 温州大学 | Permanent magnetic contactor with switching-off protection function |
| CN107293455A (en) * | 2017-08-08 | 2017-10-24 | 浙江人民电器有限公司 | Tripping mechanism, permanent magnet type breaker and the switch cubicle of permanent magnet type breaker |
-
2018
- 2018-12-24 CN CN201811583141.5A patent/CN109659200B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564290A (en) * | 2004-03-30 | 2005-01-12 | 扬中市中金电器设备有限公司 | Permanent-magnet double steady-state contactor |
| CN201274237Y (en) * | 2007-11-19 | 2009-07-15 | 雷民主 | Permanent magnet lock type circuit breaker operation mechanism without friction obstacle during switching on and switching off |
| CN104282508A (en) * | 2014-10-13 | 2015-01-14 | 浙江正泰电器股份有限公司 | Electromagnetic tripping device with tripping mechanism |
| CN104851749A (en) * | 2015-05-07 | 2015-08-19 | 温州大学 | Permanent magnetic contactor with switching-off protection function |
| CN107293455A (en) * | 2017-08-08 | 2017-10-24 | 浙江人民电器有限公司 | Tripping mechanism, permanent magnet type breaker and the switch cubicle of permanent magnet type breaker |
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| Publication number | Publication date |
|---|---|
| CN109659200A (en) | 2019-04-19 |
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