CN201185167Y

CN201185167Y - Magnetic flux converter

Info

Publication number: CN201185167Y
Application number: CNU2008200325605U
Authority: CN
Inventors: 王云峰; 何艳峰; 刘洪武; 管瑞良
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2008-02-19
Filing date: 2008-02-19
Publication date: 2009-01-21
Anticipated expiration: 2018-02-19

Abstract

The utility model relates to a flux transformer which belongs to an actuator of an intelligent release of a low voltage breaker. The flux transformer comprises a shell, a pair of yoke irons, a coil, a permanent-magnet, a movable gag bit, a beating rod and a working spring. The two ends of the shell are formed with a first opening and a second opening; the middle of the shell is provided with a shell cavity; the pair of yoke irons is in a sheet shape and arranged in the shell cavity; the permanent-magnet is arranged between the pair of yoke irons; the movable gag bit is arranged at one side of the shell cavity near the first opening and can be vertically arranged with the yoke irons; a working gas clearance can be formed between the two; the beating rod is arranged outside the shell; one end of the beating can be connected with the movable gag bit; the working spring is sheathed between the beating rod and the shell; the utility model is characterized by also comprising a shading piece of a sheet shape arranged at one side of the shell cavity near the second opening and vertical to the pair of yoke irons; besides, a fixed gas clearance is formed between the shaping sheet and the yoke irons. The flux transformer has the advantages that: each part of a magnetic circuit all adopts a sheet shape, thus being conveniently manufactured and mounted with a low cost; the performance stability and the qualified rate of a finished product are high.

Description

Magnetic flow convertor

Technical field

The utility model belongs to the executive component of low-voltage circuit breaker intelligent electrical apparatus release, particularly relates to a kind of magnetic flow convertor.

Background technology

Magnetic flow convertor is finished the action of threading off as an important pivot in intelligent release and the circuit breaker operation mechanism in order to activate circuit breaker operation mechanism.It has two stable states, respectively corresponding small one and large one two different working gas gaps, and when unskilled labourer's acting air gap, permanent magnet provides magnetic force bigger than working spring power, makes to hit bar and remain on the attracted position; When big working gas gap, the magnetic force of working spring force rate permanent magnet is big, makes to hit bar and remain on the off-position.When operate as normal, magnetic flow convertor remains on the attracted position, when fault, can occur electric current in the coil of magnetic flow convertor and produce magnetic flux, this magnetic flux has been offset the magnetic flux that permanent magnet produced, and makes the magnetic force that is applied on the armature reduce rapidly, under the effect of working spring, hit the bar rapid release, and mechanical power is conducted to circuit breaker operation mechanism, realize the dropout of operating mechanism.

Therefore magnetic flow convertor is as a kind of various lots of product, and the quality of performance is directly connected to the reliability of circuit breaker work, how to improve the stability and the product qualified rate of magnetic flow convertor, and simplifies and produce that to reduce cost be crucial.Traditional magnetic flow convertor, as disclosed magnetic flow convertor in the Chinese invention patent " electro-magnetic circuit breaker " (publication number is CN1290949A), it is that a box-like groove is arranged, closing with cap seal, press close to inwall in groove inside a loop coil is arranged, a plastic sleeve is arranged in the coil, a permanent magnet and an annular pole shoe, permanent magnet also is annular, directly be located in the bottom of groove, press close to annular pole shoe and be in contact with one another, the annular pole shoe is divided into different two sections of internal diameter, sleeve makes permanent magnet and annular pole shoe near the bottom, permanent magnet and annular pole shoe the inside are moving cores, one end of this moving core is near bottom land, and the other end is then through the lid outside, is provided with helical compression spring between the ring-type convex shoulder of moving core and annular pole shoe, between the outer surface of the inner surface of one section of annular pole shoe and moving core, a fixedly air gap is arranged, and a very little working gas gap is arranged between moving core and trench bottom.The magnetic flow convertor of this structure, the deficiency of its existence is: permanent magnet, pole shoe, sleeve all adopt loop configuration, make complexity, the cost height; Above-mentioned mounting structure is difficult to realize the cooperation of spring and permanent magnet is corrected, and causes the unstable properties of magnetic flow convertor, product qualified rate low, thereby can influence the reliability of circuit breaker work.

Summary of the invention

The purpose of this utility model be to provide a kind of simple in structure, convenient for installation and maintenance, cost of manufacture is low, stable performance, magnetic flow convertor that product qualified rate is high.

The purpose of this utility model reaches like this: a kind of magnetic flow convertor, comprise shell, yoke, coil, permanent magnet, mobile armature, strike bar, working spring, the two ends port of described shell is formed with first, second opening respectively, middle tool shell chamber; Described yoke is a thin slice shape, has a pair of and is arranged in the shell chamber with being parallel shape, is arranged with coil at least one yoke; Described permanent magnet is placed between a pair of yoke and with a pair of yoke subsides and touches; Described mobile armature is positioned at the side that the shell chamber is close to first opening, is vertical setting with a pair of yoke, is formed with the working gas gap on the direction of motion between mobile armature and a pair of yoke; Described strike bar is positioned at outside the shell, and the one end is connected with mobile armature in the shell chamber after passing first opening; Described working spring is set in and hits between bar and the shell; Be characterized in: also include one fen magnetic sheet, this minute magnetic sheet be thin slice shape, be positioned at the side that the shell chamber is close to second opening, be vertical setting with a pair of yoke, between minute magnetic thin slice and a pair of yoke, be formed with fixedly air gap.

The T shape of the cross sectional shape of a pair of yoke described in the utility model for constituting by narrow section of contracting and the expansion section of establishing, the coil winding is on the narrow section of contracting of yoke, and permanent magnet is arranged in the middle of the expansion section of establishing of a pair of yoke, and touches with a pair of yoke subsides.

The utility model is formed with a dop at an end of described strike bar, correspondingly, offers a dop hole on described mobile armature, can realize hitting being connected of bar and mobile armature by the dop and the cooperation in dop hole.

Shell described in the utility model is the narrow spring base that is used for the installment work spring that shortens in the end, outer end that is close to first opening.

Armature described in the utility model, yoke and branch magnetic sheet are made by ferromagnetic material.

Be provided with pad in the fixedly air gap that forms between described in the utility model minute magnetic sheet and a pair of yoke.

Pad described in the utility model is to be made by nonferromugnetic material.

The utility model is because after adopting said structure, and one of advantage that has, because mobile armature, yoke and divide magnetic sheet all to adopt thin slice shape is convenient to processing and manufacturing, cost is low and it is convenient to install; Two, owing to divide magnetic sheet can pack at last in the shell by second opening, therefore can more easily regulate the fixedly parameter of air gap, the cooperation of working spring and permanent magnet is corrected the stability and the product qualified rate of raising magnetic flow convertor to finish.

Description of drawings

Fig. 1 is an example structure sketch of the present utility model.

Fig. 2 is the three-dimensional exploded view of each parts of the utility model.

Fig. 3 is the pie graph of in the enclosure armature of the utility model setting, yoke, pad, branch magnetic sheet, permanent magnet.

Fig. 4 is magnetic circuit of the present utility model and air gap schematic diagram.

Fig. 5 is the three-dimensional structure diagram of yoke of the present utility model.

Fig. 6 is the three-dimensional structure diagram of shell of the present utility model.

Fig. 7 is the three-dimensional structure diagram of strike bar of the present utility model.

Among the figure: 1. shell, 11. first openings, 12. spring bases, 13. second openings, 14. shell chambeies; 2. hit bar, 21. dops; 3. working spring; 4. mobile armature, 41. dop holes; 5. yoke, the 51. narrow sections of contracting, 52. expand the section of establishing; 6. pad; 7. branch magnetic sheet; 8. permanent magnet; 9. coil; A. the fixing air gap of working gas gap, B..

Embodiment

For make your auditor particularly the public can further understand technical spirit of the present utility model, the spy is described in detail as follows specific implementation of the present utility model in conjunction with the accompanying drawings, but embodiment is construed as limiting technical solutions of the utility model, and any pro forma replacement or notional literal are modified all should be considered as the technical solution of the utility model category.

See also Fig. 1 and in conjunction with Fig. 2, Fig. 3, Fig. 4 and Fig. 5, Fig. 6 and Fig. 7, the magnetic flow convertor that present embodiment provided comprises that a shell 1, a pair of yoke 5, two coil 9, a permanent magnet 8, an armature 4, one hit bar 2, a working spring 3 and one a fen magnetic sheet 7 and a pad 6.The two ends port of described shell 1 is formed with first,

second opening

11,13 respectively, middle tool shell chamber 14, the narrow spring base 12 (shown in Figure 6) that shortened in the end, outer end that is close to first opening 11.Described yoke 5, coil 9, permanent magnet 8, armature 4, magnetic sheet 7 and pad 6 all place in the shell chamber 14 of shell 1, wherein: yoke 5 has a pair of, laterally being set in parallel of shell chamber 14, a pair of yoke 5 is preferably made the identical thin slice shape of shape by ferromagnetic material, the cross sectional shape of each thin slice shape yoke 5 is by the narrow section of contracting 51 and expands the T shape (shown in Figure 5) that the section of establishing 52 constitutes, two coils 9 respectively winding on the narrow section of contracting 51 of a pair of yoke 5, can save the use amount and the volume of copper like this, reduce cost, the two ends of coil 9 are connected on the control circuit of magnetic flow convertor successively, when electric current occurring in the circuit, coil 9 can provide enough numbers of ampere turns to produce magnetic flux; Permanent magnet 8 is sandwiched between a pair of yoke 5 and expands the centre of the sections of establishing 52, and with the tight adhesive of inboard wall body of a pair of yoke 5; Mobile armature 4 is by the ferromagnetic material shape of laminating, offer microscler dop hole 41 in the middle of it, mobile armature 4 is vertically set on the vertical of a pair of yoke 5, and be close to a side of first opening 11, between mobile armature 4 and a pair of yoke 5, be formed with the working gas gap A (shown in Figure 4) that moves on the directions X; Divide magnetic sheet 7 by the ferromagnetic material shape of laminating, be vertically set on the vertical of a pair of yoke 5, and be close to a side (promptly being arranged on the opposite side of a pair of yoke 5) of second opening 13 with respect to mobile armature 4, between minute magnetic thin slice 7 and a pair of yoke 5, be formed with fixedly air gap B, be provided with pad 6 in the middle of fixing air gap B, pad 6 is by the nonferromugnetic material shape of laminating.In order to make the action of hitting bar 2 rapider, preferably select for use the plastics of light weight to make, the narrow microscler dop 21 (shown in Figure 7) that shortened into of one end, hitting bar 2 places outside the shell 1, microscler dop hole 41 in the middle of the mobile armature 4 of one end of the microscler dop 21 of tool in first opening, 11 backs of passing shell 1 one ends and shell chamber 14 is of coupled connections, specifically: microscler dop 21 penetrates in the microscler dop hole 41, by rotating to an angle, can form the manifold type clamping with mobile armature 4.Described working spring 3 is set in and hits between bar 2 and the shell 1, and working spring 3 can be a stage clip, and the one end is connected with strike bar 2, and the other end is connected with spring base 12 on the shell 1.

Please continue to consult Fig. 4, the working gas gap A that forms between a pair of yoke 5 described in the utility model and the armature 4 is a variable-air-gap, and during by adhesive, working gas gap A is less at armature 4, and when armature 4 was released, working gas gap was bigger.A pair of yoke 5 described in the utility model and to divide the fixedly air gap B that forms between the magnetic thin slice 7 be an immutable air gap, the pad 6 that is provided with in fixing air gap B are in order to keep fixedly bigger magnetic resistance in the air gap.As shown in Figure 4, between the coil 9 of described mobile armature 4 and a pair of yoke 5, magnetic loop can be formed with, and between described a pair of yoke 5 and branch magnetic sheet 7, magnetic loop can be formed equally.

The utility model magnetic flow convertor assembles like this: will hit bar 2 cover upper springs 3, and pass first opening 11 on the shell 1, and realize being of coupled connections with the microscler dop hole 41 in the middle of the mobile armature 4 by the microscler dop 21 that hits on the bar 2 then; Be arranged with coil 9 respectively on the narrow section of contracting 51 of a pair of yoke 5, permanent magnet 8 is positioned over a pair of yoke 5 and expands the centre of the section of establishing 52, because the suction of permanent magnet 8, a pair of yoke 5 closely is pull-in on the permanent magnet 8, pack into together again in the shell 1, load onto pad 6 at last at the rear portion successively and divide magnetic sheet 7, because magneticaction, pad 6 and branch magnetic sheet 7 tightly are pressed on a pair of yoke 5.

The utility model is the thin slice plate owing to form each parts of magnetic circuit, is very beneficial for processing and manufacturing; More advantageously, because dividing magnetic sheet 7 is last installation, fixedly air gap B between itself and a pair of yoke 5 is easy to regulate, as quantity by increase or minimizing pad 6, realization is to the fixedly rectification of air gap, thereby can guarantee the stability of magnetic flow convertor, effectively improve the qualification rate of product.

The utility model is to come work like this: when attracting state, do not have electric current in the coil 9, because the magnetic force that permanent magnet 8 produces at working gas gap A is greater than the elastic force of working spring 3, so armature 4 leans against the end of a pair of yoke 5.When electric current occurring in the coil 9, produce a magnetic flux opposite with permanent magnet 8 by coil 9 in magnetic circuit, the magnetic force among the working gas gap A is reduced rapidly, at this moment the elastic force that provides of working spring 3 is greater than the magnetic force of working gas gap A, bar 2 is hit in very fast promotion, causes it to move to the off-position.Working gas gap A during the off-position is bigger, and the most of fixedly air gap B that passes through of the magnetic flux that permanent magnet 8 produces is therefore less at the magnetic force that working gas gap A produces.Because the elastic force of working spring 3, hits bar 2 and armature 4 greater than magnetic force and remains on the off-position.When magnetic flow convertor resets, owing to do not have electric current in the coil 9, on strike bar 2, apply an external force, armature 4 is pushed back working gas gap A smaller part get final product.

Claims

1, a kind of magnetic flow convertor, comprise shell (1), yoke (5), coil (9), permanent magnet (8), mobile armature (4), hit bar (2), working spring (3), the two ends port of described shell (1) is formed with first, second opening (11,13), middle tool shell chamber (14) respectively; Described yoke (5) is a thin slice shape, has a pair of and is arranged in the shell chamber (14) with being parallel shape, is arranged with coil (9) at least one yoke (5); Described permanent magnet (8) is placed between a pair of yoke (5) and with a pair of yoke (5) subsides and touches; Described mobile armature (4) is positioned at the side that shell chamber (14) is close to first opening (11), is vertical setting with a pair of yoke (5), is formed with the working gas gap on the direction of motion between mobile armature (4) and a pair of yoke (5); Described strike bar (2) is positioned at outside the shell (1), and the one end is passing first opening (11) back and the mobile armatures (4) in shell chamber (14) are connected; Described working spring (3) is set in and hits between bar (2) and the shell (1); It is characterized in that also including one fen magnetic sheet (7), this minute magnetic sheet (7) is a thin slice shape, be positioned at the side that shell chamber (14) is close to second opening (13), be vertical setting, between minute magnetic thin slice (7) and a pair of yoke (5), be formed with fixedly air gap with a pair of yoke (5).

2, magnetic flow convertor according to claim 1 is provided with pad (6) in the fixedly air gap that it is characterized in that forming between described minute magnetic sheet (7) and a pair of yoke (5).

3, magnetic flow convertor according to claim 2 is characterized in that described pad (6) is to be made by nonferromugnetic material.

4, magnetic flow convertor according to claim 1, the T shape of cross sectional shape that it is characterized in that described a pair of yoke (5) for constituting by narrow section of contracting (51) and the expansion section of establishing (52), coil (9) winding is on the narrow section of contracting (51) of yoke (5), permanent magnet (8) is arranged in the middle of the expansion section of establishing (52) of a pair of yoke (5), and touches with a pair of yoke (5) subsides.

5, magnetic flow convertor according to claim 1, it is characterized in that being formed with a dop (21) at an end of described strike bar (2), correspondingly, on described mobile armature (4), offer a dop hole (41), can realize hitting being connected of bar (2) and mobile armature (4) by the dop (21) and the cooperation of dop hole (41).

6, magnetic flow convertor according to claim 1, it is characterized in that described shell (1) in the end, outer end that is close to first opening (11) the narrow spring base (12) that is used for installment work spring (3) that shortens into.

7, magnetic flow convertor according to claim 1 is characterized in that described armature (4), yoke (5) and divides magnetic sheet (7) to make by ferromagnetic material.