阅读说明：本技术 一种双磁路直动式低功耗永磁体分闸助力电磁机构 (Double-magnetic-circuit direct-acting low-power-consumption permanent magnet brake-separating power-assisted electromagnetic mechanism ) 是由 耿英三 刘劭玮 马慧 孙丽琼 刘志远 王建华 于 2019-11-06 设计创作，主要内容包括：一种双磁路直动式低功耗永磁体分闸助力电磁机构,包括导磁回路部分、电磁驱动部分、传动部分、稳态保持部分和供电部分；导磁回路部分包括由铁磁材料制成的轭铁上盖板、轭铁主体和导磁衬套；电磁驱动部分包括电磁线圈、非导磁材料制成的线圈骨架和导磁材料制成的动铁芯；传动部分包括机构内十字连杆及其底部紧固件；稳态保持部分包括分闸弹簧和分闸助力永磁体组合；供电部分包括电磁线圈引出线和供电双电源；本发明首先通过双电源供电减小电磁机构在合闸保持位置的功率损耗；其次通过双励磁回路设计,在铁芯底部施加永磁体助力,利用永磁体吸力随气隙增大急速衰减的原理,使得在合闸阶段不增大电磁机构负担的同时在分闸阶段增大电磁机构分闸速度。(A double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism comprises a magnetic conduction loop part, an electromagnetic driving part, a transmission part, a steady state maintaining part and a power supply part; the magnetic conductive loop part comprises a yoke upper cover plate made of ferromagnetic materials, a yoke main body and a magnetic conductive lining; the electromagnetic driving part comprises an electromagnetic coil, a coil framework made of non-magnetic materials and a movable iron core made of magnetic materials; the transmission part comprises an inner cross connecting rod of the mechanism and a bottom fastener thereof; the steady state maintaining part comprises a brake separating spring and a brake separating assisting permanent magnet combination; the power supply part comprises an electromagnetic coil outgoing line and a power supply double power supply; the invention firstly reduces the power loss of the electromagnetic mechanism at the closing holding position by the dual power supply; and secondly, through the design of a double excitation loop, the permanent magnet assistance is applied to the bottom of the iron core, and the principle that the permanent magnet attraction rapidly attenuates along with the increase of an air gap is utilized, so that the brake opening speed of the electromagnetic mechanism is increased in the brake opening stage while the burden of the electromagnetic mechanism is not increased in the brake closing stage.)

1. The utility model provides a double magnetic circuit direct action type low-power consumption permanent magnet separating brake helping hand electromagnetic mechanism which characterized in that: the electromagnetic driving device comprises a magnetic conduction loop part, an electromagnetic driving part, a transmission part, a steady state maintaining part and a power supply part;

the magnetic conduction loop part comprises an upper yoke cover plate (2) made of ferromagnetic materials, a yoke main body (6) and a magnetic conduction bush (8), the upper yoke cover plate (2) is positioned on the yoke main body (6) and connected with the yoke main body (6) through fasteners or welding, and the magnetic conduction bush (8) is positioned inside the lower part of the yoke main body (6) and connected with the yoke main body (6) through fasteners or welding; the electromagnetic driving part comprises an electromagnetic coil (5), a coil framework (3) made of non-magnetic materials and a movable iron core (7) made of magnetic materials, the coil framework (3) is positioned between the electromagnetic coil (5) and a magnetic bushing (8), and the movable iron core (7) is positioned in the coil framework (3); the electromagnetic coil (5) generates a magnetic field after being electrified, and the magnetic field generates electromagnetic attraction to attract the movable iron core (7) to move through the magnetic conductive bush (8), the yoke main body (6), the yoke upper cover plate (2), air and the movable iron core (7); the transmission part comprises a cross connecting rod (1) positioned in the movable iron core (7) and a bottom fastening piece (9) thereof, and the cross connecting rod (1) and the movable iron core (7) are fastened and connected into a moving whole by the fastening piece (9); the steady state maintaining part comprises a switching-off spring (4) sleeved on the cross connecting rod (1), a non-magnetic conductive frame (10) positioned at the bottom of the yoke main body (6) and a switching-off power-assisted permanent magnet (11) positioned at the center of the non-magnetic conductive frame (10), the switching-off power-assisted permanent magnet (11) is embedded into the non-magnetic conductive frame (10), and the switching-off power-assisted permanent magnet (11) is magnetized along the moving direction of the movable iron core (7); the power supply part comprises an electromagnetic coil outgoing line (12) and a power supply double power supply (13); the power supply double power supply (13) is connected with the electromagnetic coil (5) through an electromagnetic coil outgoing line (12);

by the matching design of the relative positions of a movable iron core (7) made of ferromagnetic materials, an upper yoke cover plate (2), a yoke main body (6) and a magnetic conductive bushing (8), an electromagnetic coil magnetic line loop and a permanent magnet magnetic line loop are respectively formed in the stages of closing movement, closing keeping and opening movement and keeping;

when the electromagnetic mechanism performs upward closing motion, the magnetic line loop of the electromagnetic coil plays a main role, and a high-voltage-level power supply in a power supply dual power supply (13) supplies power to enable the electromagnetic attraction generated by electrifying the electromagnetic coil (5) to overcome the counter force of the opening power-assisted permanent magnet (11) and the opening spring (4) so as to realize the closing motion of the movable iron core (7) and the cross connecting rod (1); when the electromagnetic mechanism reaches a suction state, the air gap is small, the electromagnetic suction force is large, a small-voltage-level power supply in a power supply dual power supply (13) is switched to supply power to the electromagnetic coil (5), and closing holding force is provided under low power consumption; when the electromagnetic mechanism carries out opening movement downwards, the electromagnetic coil (5) is powered off, the permanent magnet magnetic line loop acts, the movable iron core (7) and the cross connecting rod (1) move downwards under the combined action of the opening spring (4) and the opening assisting permanent magnet (11), opening operation is achieved, and opening speed is effectively improved.

2. The double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism as claimed in claim 1, wherein: the movable iron core (7) performs opening and closing motion along the axial direction of the cross connecting rod (1).

3. The double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism as claimed in claim 1, wherein: the diameter of the opening power-assisted permanent magnet (11) is smaller than or equal to that of the movable iron core (7).

4. The double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism as claimed in claim 1, wherein: the magnetic conduction loop part comprises a yoke upper cover plate (2) made of ferromagnetic materials, a yoke main body (6) and a magnetic conduction lining (8) which are integrally or separately manufactured.

5. The double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism as claimed in claim 1, wherein: the power supply double power supply (13) is any combination of a direct current power supply and an alternating current power supply.

6. The double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism as claimed in claim 1, wherein: the opening spring (4) is a mechanical structure with spring-like characteristics.

Technical Field

The invention relates to the field of switching devices, in particular to a double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism.

Background

The switching device is an important protection device for safe and stable operation of a power grid, and is used for ensuring the on-off, conversion and other tasks of electric energy transmission, and when a power grid system fails, the separation of the fault and the power grid is automatically realized, so that the fault danger range is reduced. The electromagnetic mechanism is an important device for bearing and realizing the on-off of the switching device, so the electromagnetic mechanism is a switching device taking electromagnetic force as main driving force, and the electromagnetic mechanism is generally in a monostable state, namely a switching-off steady state. When the electromagnetic coil is not electrified, the electromagnetic mechanism is in a brake-off state, so that the switch is in an off state; when the electromagnetic coil is electrified, the electromagnetic mechanism is in a closing state under the action of electromagnetic attraction, so that the switch is in a closing state.

However, the traditional electromagnetic mechanism is often large in size, and the electromagnetic attraction force is large and has a large margin at the attraction position, so that electric energy is wasted to a great extent; in addition, in order to reduce coil load, the combination of the opening reaction force and the suction force is often selected by different switches according to the numerical combination just matched, the situation that the opening steady state cannot be maintained easily occurs under different switches and different installation modes, and the opening speed is slow, which is very unfavorable for the switching apparatus.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a double-magnetic-circuit direct-acting low-power-consumption permanent magnet brake-separating power-assisted electromagnetic mechanism, which combines a large amount of research and experimental accumulation in the early stage.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism comprises a magnetic conduction loop part, an electromagnetic driving part, a transmission part, a steady state maintaining part and a power supply part;

the magnetic conduction loop part comprises an upper yoke cover plate 2 made of ferromagnetic materials, a yoke main body 6 and a magnetic conduction bush 8, wherein the upper yoke cover plate 2 is positioned on the yoke main body 6 and connected with the yoke main body 6 through fasteners or welding, and the magnetic conduction bush 8 is positioned inside the lower part of the yoke main body 6 and connected with the yoke main body 6 through fasteners or welding; the electromagnetic driving part comprises an electromagnetic coil 5, a coil framework 3 made of non-magnetic materials and a movable iron core 7 made of magnetic materials, wherein the coil framework 3 is positioned between the electromagnetic coil 5 and a magnetic bushing 8, and the movable iron core 7 is positioned in the coil framework 3; the electromagnetic coil 5 generates a magnetic field after being electrified, and the magnetic field generates an electromagnetic attraction force to attract the movable iron core 7 to move through the magnetic conductive lining 8, the yoke main body 6, the yoke upper cover plate 2, the air and the movable iron core 7; the transmission part comprises a cross connecting rod 1 positioned in the movable iron core 7 and a bottom fastening piece 9 thereof, and the cross connecting rod 1 and the movable iron core 7 are fastened and connected into a moving whole by the fastening piece 9; the steady state maintaining part comprises a switching-off spring 4 sleeved on the cross connecting rod 1, a non-magnetic conduction frame 10 positioned at the bottom of the yoke main body 6 and a switching-off power-assisted permanent magnet 11 positioned at the center of the non-magnetic conduction frame 10, the switching-off power-assisted permanent magnet 11 is embedded into the non-magnetic conduction frame 10, and the switching-off power-assisted permanent magnet 11 is magnetized along the moving direction of the movable iron core 7; the power supply part comprises an electromagnetic coil outgoing line 12 and a power supply double power supply 13; the power supply double power supply 13 is connected with the electromagnetic coil 5 through an electromagnetic coil outgoing line 12.

By means of the design of matching the relative positions of the movable iron core 7 made of ferromagnetic materials, the yoke upper cover plate 2, the yoke main body 6 and the magnetic conductive bushing 8, an electromagnetic coil magnetic line loop and a permanent magnet magnetic line loop are formed in the stages of closing movement, closing keeping and opening movement and keeping.

When the electromagnetic mechanism performs upward closing movement, the magnetic line loop of the electromagnetic coil generates main action, and the electromagnetic attraction generated by electrifying the electromagnetic coil 5 overcomes the counter force of the opening power-assisted permanent magnet 11 and the opening spring 4 by the power supplied by the high-voltage level power supply in the power supply double power supplies 13 to realize the closing movement of the movable iron core 7 and the cross connecting rod 1; when the electromagnetic mechanism reaches a suction state, the air gap is small, the electromagnetic suction force is large, a small-voltage-level power supply in the power supply dual power supply 13 is switched to supply power to the electromagnetic coil 5, and closing holding force is provided under low power consumption; when the electromagnetic mechanism carries out opening movement downwards, the electromagnetic coil 5 is powered off, the permanent magnet magnetic line loop acts, the movable iron core 7 and the cross connecting rod 1 move downwards under the combined action of the opening spring 4 and the opening assisting permanent magnet 11, opening operation is realized, and opening speed is effectively increased.

And the movable iron core 7 performs opening and closing motion along the axial direction of the cross connecting rod 1.

The diameter of the opening power-assisted permanent magnet 11 is less than or equal to that of the movable iron core 7.

The magnetic conduction loop part comprises an upper yoke cover plate 2 made of ferromagnetic materials, a yoke main body 6 and a magnetic conduction lining 8 which are integrally or separately manufactured.

The power supply double power supply 13 is any combination of a direct current power supply and an alternating current power supply.

The opening spring 4 is a mechanical structure with spring-like characteristics.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, through a dual-power supply mode, the electric energy consumption of the electromagnetic mechanism in a closing steady state is greatly reduced;

2. according to the invention, through the structural matching design of the magnetic conductive material parts, in the design of a double magnetic circuit, the magnetic circuit separation in the switching-on and switching-off processes is realized, and the blocking effect of the permanent magnet at the switching-on position of the mechanism is avoided.

3. According to the invention, by additionally arranging the brake-separating power-assisted permanent magnet, the brake separation of the electromagnetic mechanism after power failure is ensured, and the brake separation speed of the electromagnetic mechanism is improved.

Drawings

FIG. 1 is a structural cross-sectional view of a double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism of the invention;

FIG. 2 is a partial cross-sectional view of a magnetic conductive loop of the present invention;

FIG. 3 is an electromagnetic partial cross-sectional view of the present invention;

FIG. 4 is a cross-sectional view of a transmission portion of the present invention;

FIG. 5 is a cross-sectional view of the steady state retention portion of the present invention and its attachment components;

FIG. 6 is a cross-sectional view of the electromagnetic mechanism in a steady state closed position in accordance with the present invention;

FIG. 7 is a schematic circuit diagram of a dual power supply solenoid of the present invention;

FIG. 8 is a schematic view of magnetic lines of force of the brake-separating assisting permanent magnet at the brake-separating position when the power supply is not energized.

Detailed Description

The invention is described in further detail below with reference to the following figures and specific embodiments.

Fig. 1 is a structural cross-sectional view of a double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism. A double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism comprises magnetic conduction loop parts (2, 6 and 8), electromagnetic driving parts (3, 5 and 7), transmission parts (1 and 9), steady-state maintaining parts (4, 10 and 11) and power supply parts (12 and 13).

Fig. 2 is a partial cross-sectional view of a magnetically conductive circuit of the present invention, the magnetic circuit including an upper yoke cover plate 2 made of ferromagnetic material, a yoke body 6, and a magnetically conductive liner 8; the upper yoke cover plate 2 is positioned on the yoke main body 6 and connected with the yoke main body 6 through a fastener or welding; the magnetic conductive bush 8 is positioned inside the lower part of the yoke main body 6 and is connected with the yoke main body 6 through a fastener or welding.

Fig. 3 is a cross-sectional view of an electromagnetic part of the present invention, the electromagnetic driving part includes an electromagnetic coil 5, a bobbin 3 made of a non-magnetic conductive material, and a movable iron core 7 made of a magnetic conductive material; the coil framework 3 is positioned between the electromagnetic coil 5 and the magnetic conduction lining 8, and the movable iron core 7 is positioned in the coil framework 3; the electromagnetic coil 5 generates a magnetic field after being electrified, and the magnetic field generates an electromagnetic attraction force to attract the movable iron core 7 to move through the magnetic conductive lining 8, the yoke main body 6, the yoke upper cover plate 2, the air and the movable iron core 7.

FIG. 4 is a cross-sectional view of the transmission portion of the present invention, including the mechanism's internal cross-link 1 and its bottom fastener 9; the cross connecting rod 1 and the movable iron core 7 are fixedly connected into a moving whole by a fastener 9; the steady state maintaining part comprises a switching-off spring 4 sleeved on the cross connecting rod 1, a non-magnetic conduction frame 10 positioned at the bottom of the yoke main body 6 and a switching-off assisting permanent magnet 11 positioned at the center of the non-magnetic conduction frame 10.

Fig. 5 is a structural sectional view of a steady-state maintaining part of the invention, wherein the opening brake assisting permanent magnet 11 is embedded into a non-magnetic conductive frame 10, and the opening brake assisting permanent magnet 11 is magnetized along the moving direction of the movable iron core 7; the power supply part comprises an electromagnetic coil outgoing line 12 and a power supply double power supply 13; the power supply double power supply 13 is connected with the electromagnetic coil 5 through an electromagnetic coil outgoing line 12.

Fig. 6 is a cross-sectional view of the steady-state closing position of the electromagnetic mechanism according to the present invention, which is embodied by the movable iron core 7 closely attached to the upper cover plate 2 of the yoke, and the opening spring 4 in a compressed state. In this state, the air gap in the magnetic flux circuit of the electromagnetic coil is small and plays a dominant role in the movement.

Fig. 7 is a schematic circuit diagram of a dual power supply electromagnetic coil according to the present invention, which is formed by connecting a high voltage power supply and a low voltage power supply in parallel, wherein the high voltage power supply is used for supplying power to realize rapid switching-on at the initial stage of switching-on, and when the switching-on operation is completed, i.e., the electromagnetic coil is in a switching-on state, the low voltage power supply is used for continuously supplying power to realize switching-on and keep.

FIG. 8 is a schematic view of magnetic lines of force of the brake-separating assisting permanent magnet at the brake-separating position when the power supply is not energized. In this state, the air gap in the magnetic line loop of the electromagnetic coil is small, the opening assisting permanent magnet 11 plays a main role, and the opening is realized under the action of the opening spring 4, so that the opening speed is effectively improved.

As a preferred embodiment of the present invention, the movable iron core 7 performs opening and closing movements along the axial direction of the cross link 1; the diameter of the opening power-assisted permanent magnet 11 is smaller than or equal to that of the movable iron core 7, so that the effective control of the action range of a magnetic line loop of the permanent magnet is realized; the magnetic conduction loop part comprises a yoke upper cover plate 2 made of ferromagnetic materials, a yoke main body 6 and a magnetic conduction lining 8, and can be manufactured integrally or separately; the power supply double power supply 13 can be any combination of a direct current power supply and an alternating current power supply; the opening spring 4 can be any mechanical structure with spring-like characteristics.

When the electromagnetic mechanism moves upwards to close a switch, a high-voltage-level power supply in a power supply dual power supply 13 supplies power to enable an electromagnetic attraction force generated by electrifying an electromagnetic coil 5 to overcome the counter force of a switching-off assisting permanent magnet 11 and a switching-off spring 4 to realize the switching-on movement of the movable iron core 7 and the cross connecting rod 1, at the moment, the movable iron core 7 is tightly attached to the yoke upper cover plate 2, and the switching-off spring 4 is in a compressed state; when the electromagnetic mechanism is attracted, the air gap is small, the electromagnetic attraction force is large, and a small-voltage-level power supply in the power supply dual power supply 13 is switched to supply power to the electromagnetic coil 5 to provide closing holding force so as to reduce the electric energy consumption during closing holding; when the electromagnetic mechanism moves downwards for opening the brake, the electromagnetic coil 5 is powered off, and the rapid and stable brake opening is realized under the combined action of the brake opening spring 4 and the brake opening assisting permanent magnet 11; the invention realizes stable and rapid brake opening on the premise of hardly increasing the switching-on load of the electromagnetic mechanism by utilizing the principle that the attraction of the permanent magnet is rapidly attenuated along with the increase of the air gap.

Compared with the traditional electromagnetic mechanism, the double-magnetic-circuit direct-acting low-power-consumption permanent magnet opening power-assisted electromagnetic mechanism provided by the invention has the advantages of two aspects: on one hand, the invention greatly reduces the electric energy consumption of the electromagnetic mechanism in a switching-on steady state in a dual-power supply mode; on the other hand, the invention adds the brake-separating power-assisted permanent magnet through the design of double magnetic circuits, ensures that the electromagnetic mechanism keeps stable brake separation after power failure, and improves the brake separation speed of the electromagnetic mechanism; in addition, the invention has simple structure and easy assembly.

The present invention is not limited to the above preferred embodiments, and those skilled in the art can modify and change a double magnetic circuit direct-acting low-power consumption permanent magnet opening power electromagnetic mechanism according to the teachings of the present invention. All such modifications and variations are intended to be included herein within the scope of this disclosure.