Permanent magnetic mechanism

Abstract

The utility model discloses a permanent magnetic mechanism. The permanent magnetic mechanism comprises a mandrel penetrating through the upper end cover and the lower end cover, an outer magnet yoke arranged between the upper end cover and the lower end cover, a coil, a static iron core and a movable iron core; the upper end cover and the lower end cover are connected through an outer magnet yoke, and permanent magnets are arranged between the coil and the static iron core and between the coil and the movable iron core. The static iron core is characterized in that the static iron core comprises a pole base and a pole head which are arranged in the axial direction of the static iron core, a first cutting groove is formed in the static iron core in the axial direction of the static iron core, the first cutting groove penetrates through the lower surface of the pole base and the upper surface of the pole head, and a second cutting groove is formed in the pole head in the radial direction of the pole head. According to the utility model, the eddy current phenomenon of the static iron core caused by an electromagnetic field is reduced, so that the closing operation current can be reduced, and the energy consumption of an external power supply is reduced to realize energy conservation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of permanent magnet mechanism, belong to high voltage, low voltage vacuum electric appliance switch accessory of electric power system. BACKGROUND

[0002] Permanent magnet mechanism is with its high reliability, long life, easy control etc. Advantage causes inside industry universal attention and obtains rapid development. Compared with traditional spring operating mechanism, its closing operation current is larger, so most manufacturers are in secondary control circuit Increase capacitor energy storage device, through external power supply to capacitor charging obtains energy and stores therein, to permanent magnet mechanism coil release energy completes closing, opening operation, but the present electric power system Most power supply room, for the safe, stable operation of system are configured larger capacity energy storage direct current power supply, at this time in the secondary control circuit of permanent magnet mechanism again Configuration energy storage capacitor, obviously it is a waste, can directly obtain energy from external energy storage direct current power supply to complete permanent magnet mechanism closing, opening operation, then from the angle of reducing closing operation current to realize energy saving. Such as China utility model publication No. CN211016831U discloses a kind of permanent magnet mechanism, it mainly through increasing storage groove, reduces transmission friction, to improve mechanical life, not involve how energy saving. SUMMARY

[0003] The utility model aims at providing a kind of permanent magnet mechanism, one aspect of the permanent magnet mechanism can reduce the eddy current phenomenon generated by electromagnetic field to static iron core, and then closing operation current can be reduced, to realize energy saving by reducing the energy consumption of external power supply.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0005] A kind of permanent magnet mechanism, including the core shaft passing through upper end cap and lower end cap, outer magnetic yoke, coil, static iron core and moving iron core being arranged between upper end cap and lower end cap;The upper end cap and lower end cap are connected by outer magnetic yoke, and permanent magnet is arranged between coil and static iron core and between coil and moving iron core;Its characterized in that, the static iron core includes pole base and pole head being divided along its axial direction, first cut slot is opened in the static iron core along its axial direction, the first cut slot penetrates pole base lower surface and pole head upper surface, and second cut slot is opened in the pole head along its radial direction.

[0006] Thus, when the electromagnetic field generated by the coil through the current and the permanent magnetic field provided by the permanent magnet are positively superimposed, the driving moving iron core moves downward to realize the closing operation, complete the closing of the main circuit and the energy storage of the contact spring and the opening spring. When the reverse superposition makes the attraction force of the moving iron core, the outer magnetic yoke and the static iron core drop suddenly, the moving iron core moves upward under the action of the counter force of the external spring to realize the opening operation. It can be seen that the closing current is larger and the opening current is smaller. The utility model creatively opens the first cut groove along the axial direction of the static iron core, and opens the second cut groove along the radial direction at the pole head, effectively reduces the eddy current phenomenon generated by the electromagnetic field on the static iron core, improves the effective work of the electromagnetic field, and reduces the operation current of the closing under the condition that the effective work of the electromagnetic field is unchanged.

[0007] According to the embodiments of the utility model, the utility model can be further optimized, and the following is the technical scheme formed after optimization:

[0008] In one preferred embodiment, the moving iron core has a third cut groove along its axial direction, which penetrates the upper and lower surfaces of the moving iron core. Thus, the electromagnetic field generated by the coil cannot form a loop in the circumferential direction of the cut groove, preventing the formation of eddy current.

[0009] In one preferred embodiment, the static iron core and the moving iron core form a first air cavity, the moving iron core and the coil form a second air cavity, and the upper end cover and the moving iron core form a third air cavity. The moving iron core has an air passage that communicates the first, second and third air cavities. A further preferred solution is that the air passage has a third cut groove along the axial direction of the moving iron core, which penetrates the upper and lower surfaces of the moving iron core. Preferably, the number of third cut grooves is one or more.

[0010] In one preferred embodiment, the first and second cut grooves on the static iron core have the same position along the circumferential direction of the static iron core.

[0011] In one preferred embodiment, the number of first and second cut grooves is one or more.

[0012] The other aspect of the permanent magnet mechanism of the utility model can reduce the air resistance of the moving iron core during movement, improve the closing and opening speed, and thus reduce the closing operation current and the energy consumption of the external power supply to achieve energy saving.

[0013] To achieve this purpose, the utility model adopts the technical scheme of:

[0014] A permanent magnet mechanism comprises a core shaft penetrating through an upper end cover and a lower end cover, an outer magnetic yoke, a coil, a static iron core and a dynamic iron core arranged between the upper end cover and the lower end cover; the upper end cover and the lower end cover are connected through the outer magnetic yoke, and permanent magnets are arranged between the coil and the static iron core and between the coil and the dynamic iron core; characterized in that a first air cavity is formed between the static iron core and the dynamic iron core, a second air cavity is formed between the dynamic iron core and the coil, and a third air cavity is formed between the upper end cover and the dynamic iron core; and a through-air passage is arranged on the dynamic iron core and communicates the first air cavity, the second air cavity and the third air cavity.

[0015] In one preferred embodiment, the through-air passage is a third slot axially arranged on the dynamic iron core and penetrating through the upper and lower surfaces of the dynamic iron core. In this way, the third slot can also prevent the electromagnetic field generated by the coil from forming a loop in the circumferential direction of the slot, thereby preventing the formation of eddy current.

[0016] In one preferred embodiment, the number of the third slots is one or more.

[0017] In this way, during the closing operation of the permanent magnet mechanism, the current passing through the coil changes with time, so that eddy current is generated on the static iron core and the dynamic iron core, thereby reducing the effective work of the electromagnetic field. In order to reduce the eddy current and improve the effective work of the electromagnetic field, the static iron core and / or the dynamic iron core are designed in the structure, the first slot is axially arranged on the static iron core, the second slot is radially arranged on the pole head of the static iron core, and the third slot is axially arranged on the dynamic iron core. In the circumferential direction of the above-mentioned slots, a loop cannot be formed, thereby preventing the formation of eddy current. In this way, the closing operation current can be reduced under the condition that the effective work of the electromagnetic field remains unchanged.

[0018] In addition, the third slot of the dynamic iron core can effectively reduce the air resistance of the dynamic iron core during the closing and opening operations, and can significantly improve the closing and opening speeds. In particular, when the opening speed is guaranteed, the force of the opening spring can be reduced, thereby reducing the closing operation work and the closing operation current.

[0019] Compared with CN211016831U, the permanent magnet mechanism of the utility model is designed by slotting the dynamic iron core, thereby reducing the moving mass and air resistance, reducing the closing operation work, reducing the closing operation current, and achieving the purpose of energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural principle diagram (axial sectional view in the opening state) of one embodiment of the utility model;

[0021] Figure 2 is Figure 1 an opening state diagram;

[0022] Figure 3 is a static iron core shaft drawing of one embodiment of the present application;

[0023] Figure 4 is a dynamic iron core shaft drawing of one embodiment of the present application. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to the drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the terms "upper", "lower", "left", "right" appear in the following, they only mean the same direction as the upper, lower, left and right of the drawings, and do not limit the structure.

[0025] Embodiment 1

[0026] With reference to Figure 1 , the permanent magnet mechanism of the present embodiment mainly consists of an upper end cover 1, an outer magnetic yoke 2, a coil 3, a permanent magnet 4, a lower end cover 5, a static iron core 6, a core shaft 7 and a dynamic iron core 8. The lower end cover 5 is connected to the outer magnetic yoke 2 and the static iron core 6 as a whole by screws, the permanent magnet 4 is installed in the gap between the outer magnetic yoke 2 and the static iron core 6, the coil 3 is installed in the cavity of the outer magnetic yoke and sits on the shoulder surface of the static iron core 6, the dynamic iron core 8 and the core shaft 7 pass through the inner hole gap of the static iron core 6 and the lower end cover 5, the dynamic iron core 8 is embedded on the upper part of the inner cavity of the coil 3, the upper end cover 1 is connected to the outer magnetic yoke 2 as a whole by threads, and the inner hole gap of the upper end cover 1 is matched with the core shaft 7. The coil 3 is the driving source, which drives the dynamic iron core 8 to move up and down through the electromagnetic field generated by the current to realize the closing and opening operation; the permanent magnet 4 is the energy source for maintaining the closing terminal position, which makes the dynamic iron core 8 attract and close on the corresponding working surface of the outer magnetic yoke 2 and the static iron core 6 through the permanent magnetic field provided by the permanent magnet 4 to realize the steady-state maintenance of the closing terminal position; the core shaft 7 and the dynamic iron core 8 are connected as a whole by threads, which is the only moving part in the permanent magnet mechanism; the upper end cover 1, the lower end cover 5 and the core shaft 7 are made of non-magnetic material.

[0027] With reference to Figure 1 With reference to Figure 3 It can be seen that the static iron core 6 is divided into a pole base 6-4 and a pole head 6-1, a first cut groove 6-3 is provided along the axial direction of the static iron core 6, the depth of which is moderate, so that the static iron core 6 maintains integrity and has good strength, and a second cut groove 6-2 is provided along the radial direction of the pole head 6-1, the second cut groove 6-2 and the first cut groove 6-3 are located at the same position along the circumferential direction of the static iron core 6, and the number of the second cut groove 6-2 and the first cut groove 6-3 is one or more than one and equal.

[0028] With reference to Figure 1 With reference to Figure 4It can be seen that the moving iron core 8 is provided with a third cut groove 8-1 along the axial direction, and the depth of the third cut groove 8-1 is moderate, so that the moving iron core 8 maintains integrity and has good strength, effectively reduces the eddy current phenomenon generated on the moving iron core when the electromagnetic field does work, improves the effective work of the electromagnetic field, and enables the air in the air cavities a1, a2 and a3 to flow freely during the closing and opening operations, effectively reducing the air resistance of the moving iron core 8 during the upward and downward movement, reducing the force of the opening spring when ensuring the opening speed, and effectively reducing the closing operation work and the closing operation current.

[0029] Through the corresponding cut grooves of the static iron core 6 and / or the moving iron core 8, the electromagnetic field generated by the coil 3 cannot form a loop in the circumferential direction of the groove, preventing the formation of eddy current, so that the closing operation current can be reduced under the condition that the effective work of the electromagnetic field remains unchanged.

[0030] In combination Figure 1 and Figure 2 It can be seen that the permanent magnet mechanism forms air cavities a1 and a2 in the opening state, and forms air cavity a3 in the closing state. During the closing operation, the air cavities a1 and a2 gradually become smaller, until the air cavity a1 disappears and the air cavity a2 becomes the air cavity a3; during the opening operation, the air cavity a3 gradually becomes smaller, and the air cavity a1 gradually forms, until the air cavity a3 becomes the air cavity a2 and the air cavity a1 is completely formed. During the above movement of the moving iron core 8, the grooves 8-1 on the moving iron core 8 enable the air in each air cavity to flow freely, greatly reducing the air resistance of the moving iron core 8 during movement, effectively improving the closing and opening speed, especially in the case of meeting the opening speed standard, the force of the opening spring can be reduced, and the closing operation work can be reduced, that is, the closing operation current can be reduced.

[0031] Example 2

[0032] In this embodiment, only the first cut groove 6-3 is provided along the axial direction of the static iron core 6, and the second cut groove 6-2 is provided along the radial direction of the pole head 6-1, effectively reducing the eddy current phenomenon generated by the electromagnetic field on the static iron core. This slot design can improve the effective work of the electromagnetic field, and the closing operation current can be reduced under the condition that the effective work of the electromagnetic field remains unchanged.

[0033] Example 3

[0034] In this embodiment, the third cut groove 8-1 is also provided along the axial direction of the moving iron core 8, effectively reducing the eddy current phenomenon generated by the electromagnetic field on the moving iron core 8. This slot design can improve the effective work of the electromagnetic field, and the closing operation current can be reduced under the condition that the effective work of the electromagnetic field remains unchanged.

[0035] Example 4

[0036] The third cut slot 8-1 of the moving iron core 8 effectively reduces the air resistance in the movement process, and the effect of improving the closing and opening speed is remarkable, so that the closing spring force can be reduced, thereby reducing the closing operation work. Through the above measures, the closing operation current of the traditional permanent magnet mechanism is reduced, and the required power energy is lower.

[0037] The above-mentioned embodiments should be understood as merely illustrating the present application, and are not used to limit the scope of the present application. After reading the present application, various equivalent modifications of the embodiments made by those skilled in the art all fall within the scope defined by the appended claims of the present application.

Claims

1. A permanent magnet mechanism, comprising a core shaft (7) passing through an upper end cover (1) and a lower end cover (5), an outer magnetic yoke (2), a coil (3), a static iron core (6) and a moving iron core (8) arranged between the upper end cover (1) and the lower end cover (5); the upper end cover (1) and the lower end cover (5) are connected via the outer magnetic yoke (2), and a permanent magnet (4) is provided between the coil (3) and the static iron core (6) and between the coil (3) and the moving iron core (8); characterized in that, The static iron core (6) is divided into a pole seat (6-4) and a pole head (6-1) along its axial direction. The static iron core (6) is provided with a first slot (6-3) along its axial direction. The first slot (6-3) passes through the lower surface of the pole seat (6-4) and the upper surface of the pole head (6-1). A second slot (6-2) is provided at the pole head (6-1) along its radial direction.

2. The permanent magnet mechanism according to claim 1, characterized in that: The moving iron core (8) is provided with a third slot (8-1) along its axial direction, and the third slot (8-1) runs through the upper and lower surfaces of the moving iron core (8).

3. The permanent magnet mechanism according to claim 1, characterized in that: A first air cavity (a1) is formed between the static iron core (6) and the moving iron core (8), a second air cavity (a2) is formed between the moving iron core (8) and the coil (3), and a third air cavity (a3) ​​is formed between the upper end cover (1) and the moving iron core (8); The moving iron core (8) is provided with an air passage connecting the first air cavity (a1), the second air cavity (a2) and the third air cavity (a3).

4. The permanent magnet mechanism according to claim 3, characterized in that: The air passage is provided with a third slot (8-1) along the axial direction of the moving iron core (8), and the third slot (8-1) runs through the upper and lower surfaces of the moving iron core (8).

5. The permanent magnet mechanism according to claim 4, characterized in that: The number of the third cutting grooves (8-1) is one or more.

6. The permanent magnet mechanism according to any one of claims 1 to 5, characterized in that: The first slot (6-3) and the second slot (6-2) on the static iron core (6) are located at the same position along the circumferential direction of the static iron core (6).

7. The permanent magnet mechanism according to any one of claims 1 to 5, characterized in that: The number of the first groove (6-3) and the second groove (6-2) is one or more.

8. A permanent magnet mechanism, comprising a core shaft (7) passing through an upper end cover (1) and a lower end cover (5), an outer magnetic yoke (2), a coil (3), a static iron core (6) and a moving iron core (8) arranged between the upper end cover (1) and the lower end cover (5); the upper end cover (1) and the lower end cover (5) are connected via the outer magnetic yoke (2), and a permanent magnet (4) is provided between the coil (3) and the static iron core (6) and between the coil (3) and the moving iron core (8); characterized in that, A first air cavity (a1) is formed between the static iron core (6) and the moving iron core (8), a second air cavity (a2) is formed between the moving iron core (8) and the coil (3), and a third air cavity (a3) ​​is formed between the upper end cover (1) and the moving iron core (8); The moving iron core (8) is provided with an air passage connecting the first air cavity (a1), the second air cavity (a2) and the third air cavity (a3).

9. The permanent magnet mechanism according to claim 8, characterized in that: The air passage is provided with a third slot (8-1) along the axial direction of the moving iron core (8), and the third slot (8-1) runs through the upper and lower surfaces of the moving iron core (8).

10. The permanent magnet mechanism according to claim 9, characterized in that: The number of the third cutting grooves (8-1) is one or more.

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