CN112133606A - Static contact for reducing closing rebound of direct-acting electromagnetic contactor - Google Patents
Static contact for reducing closing rebound of direct-acting electromagnetic contactor Download PDFInfo
- Publication number
- CN112133606A CN112133606A CN202011054241.6A CN202011054241A CN112133606A CN 112133606 A CN112133606 A CN 112133606A CN 202011054241 A CN202011054241 A CN 202011054241A CN 112133606 A CN112133606 A CN 112133606A
- Authority
- CN
- China
- Prior art keywords
- static contact
- contact
- conductive rubber
- electromagnetic contactor
- direct
- 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.)
- Pending
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 79
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000000452 restraining effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical group [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/56—Contact spring sets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Contacts (AREA)
Abstract
The invention discloses a static contact for reducing the closing rebound of a direct-acting electromagnetic contactor, which comprises an upper static contact, a lower static contact, conductive rubber and a restraint spring, wherein: the static contact is divided into an upper static contact and a lower static contact; grooves are formed in the lower end of the upper static contact and the upper end of the lower static contact; the conductive rubber is embedded into the grooves of the upper static contact and the lower static contact; the restraint spring is sleeved on the outer side of the conductive rubber and is connected with the upper static contact and the lower static contact. The static contact converts a rigid static contact into a flexible static contact on the premise of not changing the size and the internal structure of the original electromagnetic contactor, so that the tail section of the contact actuation process is buffered, the contact rebound is effectively reduced, the arc burning is reduced, the service life of the contactor is prolonged, and the static contact is suitable for a direct-acting contactor.
Description
Technical Field
The invention relates to a static contact for reducing closing bounce of a direct-acting electromagnetic contactor, which is used for reducing electric arc reignition caused by contact bounce when a static contact and a dynamic contact are contacted in the suction process of the contactor and reducing cumulative ablation amount, thereby prolonging the service life of the electromagnetic contactor.
Background
In control appliances, electromagnetic contactors are mainly used for frequently switching on and segmenting circuits, and are combined with relays to protect circuits in which overload may occur in operation. With the development of power consumption and high-power electric appliances, higher and higher requirements are put forward on the reliability of the contactor. In the working process of the contactor, the static contact and the dynamic contact complete the suction action of the main loop. In the suction process of the contact, due to the influence of impact kinetic energy, the contactor generates a rebound phenomenon, so that electric arcs are generated, the contact is ablated or welded, the contact resistance is gradually increased in the service life, and the reliability of the contactor is seriously influenced. Appropriate measures must therefore be taken to reduce this phenomenon of contact closure bounce. The method for inhibiting the contact from rebounding in the current market generally adopts larger pre-pressure of the contact, selects a contact spring with larger rigidity and reduces the closing speed of a moving contact, but the adjustment of electromagnetic attraction is often brought, so that other characteristic parameters of the electromagnetic contactor are influenced, and the design process is more complicated due to the fact that an electromagnetic system is involved.
Disclosure of Invention
The invention aims to provide a static contact for reducing the closing rebound of a direct-acting electromagnetic contactor, which can effectively reduce the rebound phenomenon in the closing process of the contact, reduce the erosion of the contact, improve the reliability of the contactor and improve the design efficiency of products.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a static contact of reducing direct action type electromagnetic contactor closure rebound, includes upper fixed contact, lower static contact, conductive rubber, restraint spring, wherein:
the static contact is divided into an upper static contact and a lower static contact;
grooves are formed in the lower end of the upper static contact and the upper end of the lower static contact;
the conductive rubber is embedded into the grooves of the upper static contact and the lower static contact;
the restraint spring is sleeved on the outer side of the conductive rubber and is connected with the upper static contact and the lower static contact.
Compared with the prior art, the invention has the following advantages:
1. the static contact structure does not change the size of the original contactor;
2. the static contact structure of the invention converts a rigid static contact into a flexible static contact;
3. the static contact structure can utilize the elastic buffering of the conductive rubber when the contact is closed, so that the bounce is reduced; when the contact is opened, the restraint spring restrains the downward movement of the static contact follow-up contact, the melting point is quickly broken, and the arcing time is reduced.
Drawings
FIG. 1 is a three-dimensional model of a direct acting electromagnetic contactor contact system of the present invention;
fig. 2 is a cross-sectional view of a stationary contact structure of the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
As shown in fig. 1, the direct-acting electromagnetic contactor contact system provided by the present invention is composed of a static contact 1, a moving contact 2, a connecting rod 3 and a moving iron core 4, wherein:
the connecting rod 3 and the movable iron core 4 are fixed with each other;
the connecting rod 3 drives the moving contact 2 and the static contact 1 to be disconnected and opened.
As shown in fig. 2, the fixed contact 1 for reducing the bounce of the direct-acting contactor provided by the present invention is composed of an upper fixed contact 5, a lower fixed contact 6, a conductive rubber 7 and a restraining spring 8, wherein:
the static contact 1 is divided into an upper static contact 5 and a lower static contact 6, and the middle part of the static contact is connected with a restraint spring 8 through a conductive rubber 7;
grooves are formed in the lower end of the upper static contact 5 and the upper end of the lower static contact 6;
the conductive rubber 7 is embedded in a groove between the upper static contact 5 and the lower static contact 6;
the restraint spring 8 is sleeved on the outer side of the conductive rubber 7, and the restraint spring 8 is welded on the lower end face of the upper static contact 5 and the upper end face of the lower static contact 6.
In the invention, the conductive rubber 7 is connected with the upper static contact 5 and the lower static contact 6 by adopting a thermal expansion matching method, and the conductive rubber 7 has certain elasticity, cannot be excessively compressed and has good conductivity.
In the invention, the conductive rubber 7 and the restraint spring 8 are utilized to convert the rigid static contact into the flexible static contact.
In the invention, the conductive rubber 7 is made of copper silver-plated conductive rubber, and the copper silver-plated conductive rubber is silicon rubber filled with copper silver-plated particles, has the maximum conductivity and has the best electromagnetic shielding effect.
In the invention, the restraining spring 8 adopts a rectangular section, the section of the rectangular section spring is larger than that of a round section spring in the same space, the rigidity is also larger, the deformation is less likely to occur, and when the static contact and the dynamic contact are separated, a force opposite to the displacement of the dynamic contact is provided to restrain the downward movement of the static contact and the dynamic contact.
The working principle is as follows:
when the electromagnetic attraction is larger than the counter force of the counter-force spring, the moving part of the contactor drives the moving contact to start moving, when the moving contact is contacted with the static contact, due to the existence of flexible conductive rubber between the static contacts, the moving part can move along with the moving contact, the kinetic energy of the moving part and the moving contact is gradually converted, the speed of the moving contact and the static contact at the closing moment is effectively reduced, collision energy is reduced, the rebound of the contact in the closing process is effectively reduced, the restriking of electric arc between the contacts caused by the rebound is inhibited, the erosion of the contacts is reduced, and the service life of the contactor is prolonged; when the electromagnetic attraction force is smaller than the counter force of the counter-force spring, the movable contact and the fixed contact are separated, and the restraining spring is connected with the upper static contact and the lower static contact, so that the restraining spring restrains the static contacts from moving downwards along with the movable contacts when the movable contacts and the fixed contacts are separated, and the quick separation of the movable contacts and the fixed contacts is guaranteed.
This structure has the following advantages: (1) on the premise of not changing the size and the internal structure of the original electromagnetic contactor, the rigid static contact is converted into the flexible static contact, so that the tail section of the contact attraction process is buffered, the contact rebound is effectively reduced, the arc burning is reduced, the service life of the contactor is prolonged, and the electromagnetic contactor is suitable for a direct-acting contactor; (2) the structure can utilize the elasticity of the conductive rubber to buffer collision kinetic energy when the contact is closed, thereby reducing rebound; when the contacts are separated, the restraint spring restrains the fixed contact and the follow-up contact from moving downwards, and the rapid separation of the contacts is guaranteed.
Claims (5)
1. The utility model provides a static contact of reducing direct action type electromagnetic contactor closure rebound which characterized in that the static contact includes last static contact, lower static contact, conductive rubber, restraint spring, wherein:
the static contact is divided into an upper static contact and a lower static contact;
grooves are formed in the lower end of the upper static contact and the upper end of the lower static contact;
the conductive rubber is embedded into the grooves of the upper static contact and the lower static contact;
the restraint spring is sleeved on the outer side of the conductive rubber and is connected with the upper static contact and the lower static contact.
2. The static contact for reducing the closing bounce of the direct acting electromagnetic contactor as claimed in claim 1, wherein the conductive rubber is copper silver plated conductive rubber.
3. The stationary contact for reducing the closing bounce of a direct acting electromagnetic contactor as claimed in claim 1, wherein said restraining spring has a rectangular cross section.
4. The stationary contact for reducing the closing bounce of the direct-acting electromagnetic contactor as claimed in claim 1 or 2, wherein the conductive rubber is connected with the upper stationary contact and the lower stationary contact by a thermal expansion fit method.
5. The stationary contact for reducing the closing bounce of the direct acting electromagnetic contactor as claimed in claim 1 or 3, wherein the restraining spring is welded to the upper stationary contact and the lower stationary contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054241.6A CN112133606A (en) | 2020-09-29 | 2020-09-29 | Static contact for reducing closing rebound of direct-acting electromagnetic contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011054241.6A CN112133606A (en) | 2020-09-29 | 2020-09-29 | Static contact for reducing closing rebound of direct-acting electromagnetic contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112133606A true CN112133606A (en) | 2020-12-25 |
Family
ID=73844803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011054241.6A Pending CN112133606A (en) | 2020-09-29 | 2020-09-29 | Static contact for reducing closing rebound of direct-acting electromagnetic contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112133606A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196506A (en) * | 2007-12-29 | 2008-06-11 | 哈尔滨工业大学 | Device for testing electrical erosion property of electrical contact material |
| CN202058603U (en) * | 2011-04-25 | 2011-11-30 | 司正生 | Movable static contactor connecting device |
| CN205723328U (en) * | 2016-04-18 | 2016-11-23 | 昆山安平电气有限公司 | There is the vacuum switch of contact buffer gear |
| CN208548316U (en) * | 2018-08-28 | 2019-02-26 | 宁波云振真空电器有限公司 | A kind of novel contact component |
| CN110491714A (en) * | 2017-07-24 | 2019-11-22 | 许继集团有限公司 | Disconnecting switch and its moving contact |
| CN210535524U (en) * | 2019-11-29 | 2020-05-15 | 瓯越电力科技有限公司 | Contact buffer structure of load switch |
-
2020
- 2020-09-29 CN CN202011054241.6A patent/CN112133606A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196506A (en) * | 2007-12-29 | 2008-06-11 | 哈尔滨工业大学 | Device for testing electrical erosion property of electrical contact material |
| CN202058603U (en) * | 2011-04-25 | 2011-11-30 | 司正生 | Movable static contactor connecting device |
| CN205723328U (en) * | 2016-04-18 | 2016-11-23 | 昆山安平电气有限公司 | There is the vacuum switch of contact buffer gear |
| CN110491714A (en) * | 2017-07-24 | 2019-11-22 | 许继集团有限公司 | Disconnecting switch and its moving contact |
| CN208548316U (en) * | 2018-08-28 | 2019-02-26 | 宁波云振真空电器有限公司 | A kind of novel contact component |
| CN210535524U (en) * | 2019-11-29 | 2020-05-15 | 瓯越电力科技有限公司 | Contact buffer structure of load switch |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201225 |
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| RJ01 | Rejection of invention patent application after publication |