CN216957867U

CN216957867U - Novel electromagnet for high-power direct-drive type split-phase control vacuum contactor

Info

Publication number: CN216957867U
Application number: CN202220420250.0U
Authority: CN
Inventors: 高瑶; 张书强; 徐有万; 李�瑞; 于铄航; 陈江; 王海王; 魏礼鹏
Original assignee: Tiandi Changzhou Automation Co Ltd; Changzhou Research Institute of China Coal Technology and Engineering Group Corp
Current assignee: Tiandi Changzhou Automation Co Ltd; Changzhou Research Institute of China Coal Technology and Engineering Group Corp
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-12
Anticipated expiration: 2032-02-28

Abstract

The utility model relates to a novel electromagnet for a high-power direct-drive type split-phase control vacuum contactor, which comprises an iron core, an electromagnetic coil arranged in the iron core, an armature attracted with the iron core and a connector connected with a vacuum tube, wherein an over-travel separating brake elastic mechanism is arranged between the armature and the iron core, and the over-travel separating brake elastic mechanism is arranged in an inner cavity of the iron core and comprises a guide shaft, a top pressing block, a bottom pressing block, an over-travel spring, a separating brake spring and a fixing block. The utility model provides a novel electromagnet structure, wherein a butterfly spring and a die spring are adopted to compress in an overtravel stage, the overtravel rigidity is enhanced, the contact pressure is increased, and the reaction speed, the precision and the reliability of a contactor are improved.

Description

Novel electromagnet for high-power direct-drive type split-phase control vacuum contactor

Technical Field

The utility model relates to the technical field of vacuum contactors, in particular to a novel electromagnet for a high-power direct-drive split-phase control vacuum contactor.

Background

The alternating current vacuum contactor is widely applied to various industrial control fields, along with the development and progress of the society, aiming at the research of the electrical service life and the reliability of the contactor, the method for effectively inhibiting the switching-on and switching-off electric arcs of the contactor, and the bouncing and the collision between contacts is as follows: zero-crossing breaking, contactor PWM closed-loop control, PID closed-loop control and the like are all realized by electromagnets in a split-phase control structure form, and the traditional CKJ series vacuum contactor is difficult to meet.

CKJ series tradition vacuum contactor drives wane mechanism through the electro-magnet, realizes the contactor deciliter, and is bulky, heavy, magnetism inefficiency, can not realize split-phase control scheduling problem, can not directly be applied to in the novel intelligent contactor. With the development of mining contactors, novel contact requirements are small in size, split-phase control, integration, intellectualization and the like, the structure of the contactor needs to be innovated, and the research on electromagnets with new structures is necessary.

The traditional vacuum contact of CKJ series adopts a solenoid electromagnet, and has the defects of complex structure, disorder parts, larger suction power, slow brake separating and time dividing speed and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the novel electromagnet for the high-power direct-drive type split-phase control vacuum contactor, which has the advantages of simple structure, large suction force and strong reliability.

The electromagnet mainly comprises an iron core, an armature, an over travel spring, a separating brake spring, a pressing block, an electromagnetic coil, a bowl-mounted insulating block and the like, wherein the electromagnetic coil is encapsulated in the iron core through epoxy resin, and a control lead is led out; the pressing block, the over travel spring, the opening spring, the armature and the like are arranged in the inner cavity of the iron core through the guide shaft; the overtravel spring adopts a belleville spring, so that the stiffness coefficient is large, the service life is long, and the precision is high; the over travel spring is fixed between the pressing block and the guide shaft and has a certain pre-compression amount, the opening spring adopts a die spring, an inner hole is larger than the butterfly spring, penetrates through the over travel spring and is fixed between the bowl-mounted insulating block and the pressing block, and the certain pre-compression amount is provided.

Specifically, the utility model is realized by the following technical scheme:

the novel high-power direct-drive split-phase control electromagnet for the vacuum contactor comprises an iron core, an electromagnetic coil arranged in the iron core, an armature attracted with the iron core and a connector connected with a vacuum tube, wherein an over-travel separating elastic mechanism is arranged between the armature and the iron core, the over-travel separating elastic mechanism is arranged in an inner cavity of the iron core and comprises a guide shaft, a top pressing block, a bottom pressing block, an over-travel spring, a separating spring and a fixing block, the guide shaft penetrates through the iron core, one end of the guide shaft is fixed with the armature through the top pressing block, the other end of the guide shaft is fixed with the connector, the fixing block is fixed in the middle of the guide shaft, the over-travel spring is sleeved outside the guide shaft, two ends of the over-travel spring abut against the fixing block and the top pressing block respectively, the bottom pressing block is arranged at the bottom end of the inner cavity of the iron core, the separating spring is sleeved outside the over-travel spring, and two ends of the separating spring are respectively abutted against the top pressing block, the pressing block and the separating spring pressing block, The bottom pressing blocks are abutted against each other, and the rigidity of the opening spring is smaller than that of the overtravel spring.

In order to further ensure the reliability of the actuation of the moving contact and the fixed contact of the vacuum tube, preferably, the stroke of the armature is greater than the preset distance between the moving contact and the fixed contact of the vacuum tube.

In a preferred embodiment of the present invention, the over travel spring is a plurality of forward and backward disc springs; and the opening spring adopts a die spring.

Preferably, the joint is a bowl-shaped insulating block, and the bowl-shaped insulating block is connected with the iron core in a sealing mode.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the vacuum tube is directly driven in the axial direction by the electromagnet, so that the vacuum tube is prevented from being difficult to open due to mechanism conversion;

(2) the utility model provides a novel electromagnet structure, wherein a butterfly spring and a die spring are adopted to compress in an overtravel stage, the overtravel rigidity is enhanced, the contact pressure is increased, and the reaction speed, the precision and the reliability of a contactor are improved;

(3) the utility model adopts split-phase driving, and provides a novel electromagnetic driving structure for realizing split-phase control of the contactor;

(4) the utility model adopts an axial hole opening and integrated structure, and has large suction force.

Drawings

FIG. 1 is a schematic structural diagram of an electromagnet for a novel high-power direct-drive split-phase control vacuum contactor according to the present invention;

fig. 2 is a schematic structural diagram of the electromagnet for the novel high-power direct-drive split-phase control vacuum contactor.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the utility model. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", "side", "end", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.

The novel electromagnet for the high-power direct-drive split-phase control vacuum contactor shown in fig. 1 comprises an iron core 2, an electromagnetic coil 9 arranged in the iron core 2, an armature 1 attracted with the iron core 2, and a connector 10 connected with a vacuum tube.

Iron core 2 is column hollow structure, and solenoid 9 is fixed in 2 bottoms of iron core, outer loop, inner ring, keeps apart through high-voltage insulation paper to use the epoxy glue embedment, armature 1, joint 10 set up respectively in 2 outer both ends of iron core (top, bottom in the figure), joint 10 is the bowl dress collets, and the bowl dress collets can slide along iron core 2, realizes flexible.

The central position of iron core 2 sets up the column inner chamber that runs through its axial top and bottom, is provided with overrun separating brake elastic mechanism in the inner chamber, and overrun separating brake elastic mechanism sets up between armature 1 and iron core 2.

The over-travel tripping elastic mechanism is arranged in an inner cavity of the iron core and comprises a guide shaft 7, a top pressing block 8, a bottom pressing block 6, an over-travel spring 3, a tripping spring 4 and a fixing block 5, wherein the guide shaft 7 penetrates through the top end and the bottom end of the iron core 2, the top end of the guide shaft is fixed with the armature 1 through the top pressing block 8, the bottom end of the guide shaft is in threaded connection with a connector 10, the fixing block 5 is fixed in the middle of the guide shaft 7, the over-travel spring 3 is sleeved outside the guide shaft 7, the top end and the bottom end of the over-travel spring 3 are respectively abutted against the fixing block 5 and the top pressing block 8, the over-travel spring 3 adopts 12 positive and negative butterfly springs, precompression is realized after fastening, the bottom pressing block 6 is arranged at the bottom end of the inner cavity of the iron core, the tripping spring 4 is sleeved outside the over-travel spring 3, two ends of the tripping spring 4 are respectively abutted against the top pressing block 8 and the bottom pressing block 6, the tripping spring 4 adopts a die spring, and precompression is realized after fastening, and the rigidity of the opening spring 4 is less than that of the overtravel spring 3.

In addition, the armature 1 and the iron core 2 are made of electrical pure iron DT4C, and have high magnetic permeability and small coercive force; the bottom pressing block 6, the fixing block 5, the guide shaft 7 and the top pressing block 8 are all made of stainless steel materials and are magnetic-insulated; the joint 10 (bowl-mounted insulating block) isolates the electromagnet from the power element, preventing high voltage from penetrating into the electromagnet and damaging the secondary control element.

When in use, as shown in fig. 2, the electromagnet is connected with the vacuum tube, the static end of the vacuum tube and the electromagnet core are fixed, and the vacuum tube is pulled by a preset distance L1; total travel L of electromagnet (armature); when the electromagnetic coil 9 is electrified, the armature 1 is gradually attracted to the iron core 2 under the action of electromagnetic force, the opening spring 4 is compressed because the rigidity of the over travel spring is greater than that of the opening spring 4, the armature 1 continuously moves to the electromagnet for complete attraction because the total stroke L of the electromagnet is greater than the opening distance L1 of the vacuum tube, and the over travel spring 3 and the opening spring 4 are compressed to the electromagnet for complete attraction;

when the electromagnet is attracted to the vacuum tube open distance L1 stage, the overtravel spring 3 is more rigid than the opening spring 4, and mainly compresses the opening spring 4; the vacuum tube contact is closed instantly, has high collision capacity and is easy to bounce; at the moment, the over-travel spring 3 pre-compression force pushes the vacuum tube moving contact A tightly to inhibit bouncing; in the stage from the opening distance L1 of the vacuum tube sucked by the electromagnet to the total stroke L of the electromagnet, the overtravel spring 3 and the opening spring 4 are compressed, and the static contact B of the vacuum tube is stressed, so that the reliability of the suction of the two contacts is enhanced, the electric arc counter force is inhibited, the suction is reliable, a certain overtravel is provided, and the contacts are prevented from being abraded;

after the electromagnet assembly loses power, the electromagnetic force disappears, the armature 1 bounces open under the combined action of the over travel spring 3 and the opening spring 4, the vacuum tube is disconnected, and the opening of the vacuum tube is realized.

It is to be noted that the irrelevant parts of the utility model are the same as or can be implemented by the prior art.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may, for example, be 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 above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides a novel high-power direct-driven formula split phase control electromagnet for vacuum contactor, includes iron core, sets up solenoid in the iron core, the armature that closes mutually with the iron core attraction and the joint that links to each other with the vacuum tube which characterized in that: be provided with overrun separating brake elastic mechanism between armature and the iron core, overrun separating brake elastic mechanism sets up in the iron core inner chamber, including guiding axle, top briquetting, bottom briquetting, overrun spring, separating brake spring and fixed block, the guiding axle runs through the iron core, and its one end is fixed mutually with armature through top briquetting, and the other end is fixed mutually with the joint, the fixed block is fixed at the guiding axle middle part, overrun spring housing is established outside the guiding axle, and overrun spring both ends lean on with fixed block, top briquetting counterbalance respectively, the bottom briquetting sets up in iron core inner chamber bottom, separating brake spring housing is established outside overrun spring, and separating brake spring both ends lean on with top briquetting, bottom briquetting counterbalance respectively, and separating brake spring rigidity is less than overrun spring rigidity.

2. The novel electromagnet for the high-power direct-drive type split-phase control vacuum contactor according to claim 1, wherein: the overtravel spring adopts a plurality of positive and negative disc springs.

3. The novel electromagnet for the high-power direct-drive type split-phase control vacuum contactor according to claim 2, wherein: and the opening spring adopts a die spring.

4. The novel electromagnet for the high-power direct-drive split-phase control vacuum contactor according to claim 1, wherein: the joint is a bowl-mounted insulating block.