CN216145563U - Improved direct current contactor contact structure - Google Patents
Improved direct current contactor contact structure Download PDFInfo
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- CN216145563U CN216145563U CN202121162465.9U CN202121162465U CN216145563U CN 216145563 U CN216145563 U CN 216145563U CN 202121162465 U CN202121162465 U CN 202121162465U CN 216145563 U CN216145563 U CN 216145563U
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- direct current
- epoxy glue
- current contactor
- contactor
- concave
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Abstract
The utility model provides an improved generation direct current contactor contact structure, includes the static contact body, its characterized in that: the middle part of the static contact body is provided with a cylindrical section combined with epoxy glue, and the cylindrical section is provided with at least one transverse annular grain characteristic part; the transverse annular grain characteristic part is of a concave-convex staggered structure, and the concave-convex staggered structure and epoxy glue form tight combination for enhancing the air tightness of the direct current contactor. According to the technology, the shape of the joint surface of the contactor contact and the epoxy glue is improved, so that the joint surface can be filled with the epoxy glue, and the sealing performance of the contactor product is improved.
Description
Technical Field
The utility model belongs to the technical field of direct current contactors, and particularly relates to an improved direct current contactor contact structure which can improve the sealing property of a direct current contactor.
Background
The contactor is characterized in that a magnetic field is generated by current flowing through a coil, so that a contact is closed, and effective power transmission is realized. The contactor is composed of electromagnetic system (moving iron core, static iron core, electromagnetic coil), contact system and arc-extinguishing device. When the electromagnetic coil of the contactor is electrified, a strong magnetic field is generated, so that the static iron core generates electromagnetic attraction to attract the movable iron core and drive the contact to act, and the contact is closed; when the coil is powered off, the electromagnetic attraction disappears, the movable iron core is released under the action of the release spring, the contact is restored, and the contact is disconnected.
The contact can generate electric arc in the on-off process, and the high temperature generated by the electric arc can lead the contact to be blackened, burnt and singed to generate metal particles, thereby directly influencing the service life of the current contactor. The general high-voltage direct-current contactor is widely used in the fields of novel energy automobiles, inverter power supplies and the like, the current can reach 200A or higher, the voltage is 500V-900V, and when the voltage is higher and higher, the problem of electric arc is more and more serious. One of the methods for solving the problem of electric arc is to adopt a sealing mode of magnetic quenching, wherein the magnetic field generated by two magnetic conduction plates (permanent magnets) is generally vertical to the connecting direction of two contacts, and meanwhile, the arc extinguishing chamber is isolated from the outside by adopting a sealing process and is filled with insulating arc extinguishing gas so as to achieve a good arc extinguishing effect.
The bonding surface of the contact and the epoxy glue of the existing direct current contactor is a smooth cylindrical surface, the sealing strength of the product depends on the characteristics of contact electroplating and materials, and the consistency of the sealing strength is poor. Chinese patent ZL201420531203.9 discloses a locking gas leakage high voltage dc contactor that moves, including the contactor main part, sealing material, characterized by: the contactor is characterized in that a stationary contact and a lead post are arranged on the upper portion of the contactor main body, and the outer surface of the lead post is of a latticed protruding structure. The gas pressure that can be born by the latticed convex structure can not meet the requirement, so that the sealing performance of the whole product is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an improved direct current contactor contact structure aiming at the problem that the outer surface of the upper lead post of the existing contactor main body can not bear the gas pressure intensity which can not meet the requirement due to the latticed raised structure.
Technical scheme
In order to achieve the technical purpose, the utility model provides an improved direct current contactor contact structure, which comprises a static contact body and is characterized in that: the middle part of the static contact body is provided with a cylindrical section combined with epoxy glue, and the cylindrical section is provided with at least one transverse annular grain characteristic part;
the transverse annular grain characteristic part is a concave-convex staggered layer structure, and the concave-convex staggered layer structure and epoxy glue form tight combination to enhance the air tightness of the direct current contactor.
Furthermore, the concave-convex staggered layer structure comprises a plurality of convex ribs with trapezoidal sections surrounding the circumference of the outer surface of the cylindrical section and triangular grooves between the adjacent convex ribs.
Advantageous effects
According to the improved direct current contactor contact structure provided by the utility model, the shape of the joint surface of the contactor contact and the epoxy glue is improved, so that the joint surface can be filled by the epoxy glue, and the sealing property of a contactor product is improved.
Drawings
Fig. 1 is a product diagram of a static contact body in an embodiment of the utility model.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Examples
As shown in fig. 1, an improved direct current contactor contact structure includes a static contact body 1, a cylindrical section 102 combined with epoxy glue is arranged in the middle of the static contact body 1, and at least one transverse annular grain characteristic portion 102a is arranged on the cylindrical section;
the transverse annular grain characteristic part 102a is a concave-convex staggered layer structure, and the concave-convex staggered layer structure and epoxy glue form tight combination to enhance the air tightness of the direct current contactor.
In particular, the rugged layered structure of the present embodiment preferably includes a plurality of ribs 102a01 having a trapezoidal cross-section around the outer surface of the cylindrical end and triangular grooves 102a02 between adjacent ribs 102a 01.
In the embodiment of the utility model, the concave-convex staggered-layer structure can fully fill the epoxy glue, and no gap exists, so that tight combination is formed, and the air tightness of the direct current contactor can be enhanced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. The utility model provides an improved generation direct current contactor contact structure, includes the static contact body, its characterized in that: the middle part of the static contact body is provided with a cylindrical section combined with epoxy glue, and the cylindrical section is provided with at least one transverse annular grain characteristic part;
the transverse annular grain characteristic part is of a concave-convex staggered structure, and the concave-convex staggered structure and epoxy glue form tight combination for enhancing the air tightness of the direct current contactor.
2. An improved dc contactor contact structure as claimed in claim 1, wherein: the concave-convex staggered layer structure comprises a plurality of convex ribs with trapezoidal sections and triangular grooves between adjacent convex ribs, wherein the convex ribs surround the circumference of the outer surface of the cylindrical section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121162465.9U CN216145563U (en) | 2021-05-27 | 2021-05-27 | Improved direct current contactor contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121162465.9U CN216145563U (en) | 2021-05-27 | 2021-05-27 | Improved direct current contactor contact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216145563U true CN216145563U (en) | 2022-03-29 |
Family
ID=80799677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121162465.9U Active CN216145563U (en) | 2021-05-27 | 2021-05-27 | Improved direct current contactor contact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216145563U (en) |
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2021
- 2021-05-27 CN CN202121162465.9U patent/CN216145563U/en active Active
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