JP2019201135A - Electromagnet device and manufacturing method of electromagnet device - Google Patents

Abstract

To obtain an electromagnet device capable of resolving a beat sound for a long period.SOLUTION: An electromagnet device 100 comprises: a stator iron core 2; a movable iron core 1 which can reciprocate in a direction approaching the stator iron core 2 and separating from the stator iron core 2, and is structured so that a plurality of iron plates are laminated in a direction vertical to the direction of a reciprocation movement; a spring 8 pressing the movable iron core 1 in the direction keeping the movable iron core away from the stator iron core 2; and an exciting coil 4 that generates an electromagnetic force that contacts magnetic electrode surfaces 1a and 1b of the movable iron core 1 and magnetic electrode surfaces 2a and 2b of the stator iron core 2 by bringing the movable iron core 1 to the stator iron core 2 side against a weight of the spring 8 during excitation. The electromagnet device 100 also comprises; a magnetic fluid 5 arranged in the magnetic electrode surfaces 1a and 1b of the movable iron core 1 and a region adjacent to the magnetic electrode surfaces 1a and 1b of the movable iron core 1 in a gap of the adjacent iron plates; and a barrier layer 7 that is arranged tightly to each of the adjacent iron plates and prevents a diffusion of the magnetic fluid 5 in the gap.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electromagnet device including a movable iron core and a fixed iron core, and a method for manufacturing the electromagnet device.

  In the AC operation type electromagnet device, the movable iron core is attracted toward the fixed iron core by electromagnetic force generated by applying an AC voltage to the coil disposed between the movable iron core and the fixed iron core during the closing operation. The magnetic pole surfaces of the movable iron core and the fixed iron core come into contact with each other, and are in an attracted state. During the opening operation, when the AC voltage applied to the coil is removed, the electromagnetic force disappears, and the magnetic pole surface between the movable core and the fixed core is caused by the repulsive force of the spring that pushes the movable core away from the fixed core. They are separated from each other.

  In such an AC operation type electromagnet device, the electromagnetic force acting between the movable iron core and the fixed iron core is a pulsating waveform having a cycle twice the power supply frequency, and the attracting force of the magnetized movable iron core is increased with time. Change. For this reason, the movable iron core and the fixed iron core at the time of operation always vibrate even under normal use conditions, and vibration sound accompanying the minute vibration is generated. In addition, in a state where the magnetic pole surfaces of the movable iron core and the fixed iron core cannot contact each other due to deterioration of the surface roughness of the magnetic pole surfaces of the movable iron core and the fixed iron core, the electromagnetic force is reduced and the repulsive force of the spring is reduced. Depending on the magnitude relationship, relatively large vibrations and noise associated with the vibrations may occur. These noises are collision sounds caused by micro displacement between the movable iron core and the fixed iron core, and are called roaring sounds.

  The electromagnet device is devised to reduce the operation sound. In Patent Document 1, the viscous resistance of the magnetic fluid applied to the magnetic pole surface, which is the collision surface between the massive iron core and the massive armature, reduces the operation sound by reducing the collision between the iron core and the armature during the closing operation. Is disclosed. In addition, as a specific method for holding magnetic fluid on the magnetic pole surface of the iron core, it is shown that a concave groove or a through hole is provided in the magnetic pole surface and the magnetic fluid is held by a capillary phenomenon in the concave groove or the through hole on the magnetic pole surface. Has been.

JP-A-2-61931

  However, when the technique for applying a magnetic fluid to the magnetic pole surface as described in Patent Document 1 is applied to an electromagnet device using a laminated iron core formed by laminating a plurality of electric iron plates, When the opening operation is repeated, the magnetic fluid diffuses into the back of the gap between the electric iron plate and the electric iron plate of the laminated iron core due to capillary action. For this reason, even if the technique described in Patent Document 1 is applied to an electromagnet device using a laminated iron core, the magnetic fluid is not retained on the magnetic pole surface for a long period of time, and it is not possible to eliminate the beat sound for a long period of time. There was a problem.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the electromagnet apparatus which can eliminate a beating sound over a long period of time.

  In order to solve the above-described problems and achieve the object, the electromagnet device according to the present invention is capable of reciprocating in a direction facing the fixed iron core and a direction away from the fixed iron core, facing the fixed iron core. The movable iron core is formed by laminating a plurality of iron plates in a direction perpendicular to the reciprocating direction, a spring that pushes the movable iron away from the fixed iron core, and the movable iron core against the spring load of the spring. And an exciting coil that generates an electromagnetic force that is attracted to the fixed iron core and contacts the magnetic pole surface of the movable iron core and the magnetic pole surface of the fixed iron core during excitation. In addition, the electromagnet device is in close contact with the magnetic fluid disposed in the gap between the adjacent iron plates and the magnetic fluid disposed in the gap between the adjacent iron plates and the region adjacent to the pole surface of the movable iron core. And a barrier layer that prevents diffusion of the magnetic fluid in the gap.

  According to the present invention, there is an effect that an electromagnet device capable of eliminating beat noise over a long period of time is obtained.

The perspective view of the electromagnet apparatus concerning Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the electromagnet apparatus concerning Embodiment 1 of this invention, and is sectional drawing along the II-II line in FIG. It is a longitudinal cross-sectional view of the electromagnet apparatus concerning Embodiment 1 of this invention, and is principal part sectional drawing along the III-III line in FIG. The longitudinal cross-sectional view which expands and shows the magnetic pole surface of the movable iron core and fixed iron core concerning Embodiment 1 of this invention The flowchart which shows the procedure of the manufacturing method of the movable core in the electromagnet apparatus concerning Embodiment 1 of this invention. In manufacture of the movable iron core concerning Embodiment 1 of the present invention, principal part sectional view showing the state where the heat melting adhesive was arranged on the 1st electric iron plate. Sectional drawing which shows the state by which the 1st electric iron plate was laminated | stacked in manufacture of the movable iron core concerning Embodiment 1 of this invention. Sectional drawing which shows the principal part which shows the state in which the barrier layer was formed in the clearance gap in manufacture of the movable iron core concerning Embodiment 1 of this invention. A longitudinal sectional view of an electromagnet device according to a second embodiment of the present invention. A longitudinal sectional view of an electromagnet device according to Embodiment 3 of the present invention.

  Hereinafter, an electromagnet device and an electromagnet device manufacturing method according to embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view of an electromagnet device 100 according to Embodiment 1 of the present invention. In FIG. 1, the description of the barrier layer 7 is omitted. 2 is a longitudinal sectional view of the electromagnet device 100 according to the first exemplary embodiment of the present invention, and is a sectional view taken along the line II-II in FIG. FIG. 2 shows a vertical cross section between the two first electric iron plates 10 constituting the movable iron core 1 of the electromagnet device 100 according to the first exemplary embodiment of the present invention. In FIG. 2, the first electric iron plate 10 is stacked in the depth direction of the drawing. FIG. 3 is a vertical cross-sectional view of the electromagnet device 100 according to the first exemplary embodiment of the present invention, and is a main-portion cross-sectional view along the line III-III in FIG. FIG. 3 shows a cross section along the stacking direction of the electric iron plates around the magnetic pole surface 1a of the movable iron core 1 of the electromagnet device 100 according to the first exemplary embodiment of the present invention. FIG. 4 is an enlarged longitudinal sectional view showing the magnetic pole surfaces of the movable iron core 1 and the fixed iron core 2 according to the first embodiment of the present invention.

  The electromagnet device 100 according to the first embodiment includes a movable iron core 1, a fixed iron core 2, an excitation coil 4 wound around a bobbin 3, and a spring 8. The movable iron core 1 and the fixed iron core 2 are arranged to face each other with the magnetic pole surfaces of the movable iron core 1 and the fixed iron core 2 facing each other. The electromagnet device 100 is an AC operation type magnet device that operates when an AC voltage is applied to the exciting coil 4.

  The movable iron core 1 is a laminated iron core that is a first iron plate constituting the movable iron core 1 and is formed by laminating a plurality of first electric iron plates 10 having the same dimensions. The movable iron core 1 faces the fixed iron core 2 and can reciprocate in a direction approaching the fixed iron core 2 and in a direction away from the fixed iron core 2, and a plurality of iron plates are stacked in a direction perpendicular to the reciprocating movement direction. Configured. In FIG. 1, the stacking direction of the first electric iron plate 10 corresponds to the direction of the arrow A. The movable iron core 1 protrudes from a rod-shaped main body 11, first and second leg portions 12 and 13 that protrude from both longitudinal ends of the main body portion 11, and a central portion in the longitudinal direction of the main body portion 11. E-shape having a third leg 14.

  The front end surface of the first leg portion 12 is a magnetic pole surface 1 a that is a magnetic pole surface with which the movable iron core 1 comes into contact with the fixed iron core 2. The distal end surface of the second leg portion 13 is a magnetic pole surface 1 b that is a magnetic pole surface with which the movable iron core 1 comes into contact with the fixed iron core 2. The magnetic pole surface 1a and the magnetic pole surface 1b are smoothed by grinding. Further, the magnetic pole surface 1a and the magnetic pole surface 1b are subjected to a treatment for preventing rust.

  The fixed iron core 2 is a laminated iron core that is a second iron plate constituting the fixed iron core 2 and is formed by laminating a plurality of second electric iron plates 20 having the same dimensions in parallel and at equal intervals. The fixed iron core 2 is configured by facing a movable iron core 1 and laminating a plurality of iron plates in a direction perpendicular to the reciprocating direction of the movable iron core 1. In FIG. 1, the stacking direction of the second electric iron plate 20 corresponds to the direction of the arrow A. The fixed iron core 2 protrudes from a rod-shaped main body portion 21, first and second leg portions 22 and 23 that protrude from both longitudinal ends of the main body portion 21, and a central portion in the longitudinal direction of the main body portion 21. E-shape having a third leg 24.

  The front end surface of the first leg portion 22 is a magnetic pole surface 2 a that is a magnetic pole surface with which the fixed iron core 2 comes into contact with the movable iron core 1. The distal end surface of the second leg portion 23 is a magnetic pole surface 2 b that is a magnetic pole surface with which the fixed iron core 2 comes into contact with the movable iron core 1. The magnetic pole surface 2a and the magnetic pole surface 2b are smoothed by grinding. Further, the magnetic pole surface 2a and the magnetic pole surface 2b are subjected to a treatment for preventing rust. Further, a winding coil 6 is embedded in the magnetic pole surface 2a and the magnetic pole surface 2b.

  In the electromagnet device 100, the movable iron core 1 and the fixed iron core 2 are formed as a laminated iron core formed by laminating electric iron plates, so that the movable iron core is movable by improving the productivity of the iron core and reducing the eddy current loss generated inside the iron core. The electromagnetic force that causes the iron core 1 to be attracted to the fixed iron core 2 is improved.

  The exciting coil 4 wound around the bobbin 3 is fixed around the third leg 24, that is, the fixed iron core 2 by the bobbin 3 being fitted and fixed to the third leg 24 of the fixed iron core 2. It is arranged around. The exciting coil 4 is a coil for generating an electromagnetic force that generates a magnetic flux and attracts the movable iron core 1 to the fixed iron core 2 when a current flows during excitation when an alternating voltage is applied.

  The spring 8 is a push spring that pushes the movable iron core 1 in a direction away from the fixed iron core 2, and the spring load increases as it is compressed. The spring load is a force generated by the amount of deflection. The spring 8 is a coil spring wound in a conical shape, for example, and is fitted into the third leg portion 14 of the movable iron core 1 and disposed between the concave portion of the movable iron core 1 and the exciting coil 4. The concave portion of the movable iron core 1 is between the first leg portion 12 and the second leg portion 13 and the third leg portion 14 in the movable iron core 1. In addition, the shape and arrangement position of the spring 8 are not limited. When the exciting coil 4 is not energized, the fixed iron core 2 and the movable iron core 1 are separated from each other by the drag of the spring 8 that pushes the movable iron core 1 in a direction away from the fixed iron core 2.

  Next, features of the movable iron core 1 will be described. On the magnetic pole surface 1a and the magnetic pole surface 1b of the movable iron core 1, a magnetic fluid 5 is disposed in a region excluding the outer peripheral edge. The magnetic fluid 5 is composed of three components of a ferromagnetic fine particle such as magnetite or manganese zinc ferrite, a surfactant that covers the surface of the ferromagnetic fine particle, and a base liquid made of water or oil, and is magnetic. It is a fluid.

  As shown in FIG. 3, the magnetic fluid 5 is applied and disposed on the magnetic pole surfaces 1 a and 1 b of the first electric iron plates 10 constituting the movable iron core 1. The magnetic fluid 5 applied on the magnetic pole surfaces 1a and 1b is not only on the magnetic pole surfaces 1a and 1b, but also in the areas adjacent to the magnetic pole surfaces 1a and 1b of the movable iron core 1 in the gap 15 between the adjacent first electric iron plates 10. Furthermore, it is sucked and held in the direction of arrow C by capillary action. That is, the magnetic fluid 5 is located in the holding region 16 that is adjacent to the magnetic pole surfaces 1a and 1b in the gap 15 in a plane parallel to the in-plane direction of the first electric iron plate 10 and holds the magnetic fluid 5. It is sucked up and held by capillary action. The holding region 16 is a predetermined region in the gap 15 where the magnetic fluid 5 is held by capillary action.

  Further, as shown in FIG. 4, the magnetic pole surfaces 1a and 1b of the movable iron core 1 are made flat by eliminating the unevenness by filling the unevenness present on the end surface of the first electric iron plate 10 with the magnetic fluid 5. . Thus, the magnetic pole surfaces are in contact with each other, that is, the magnetic pole surface 1a of the movable iron core 1 and the magnetic pole surface 2a of the fixed iron core 2 are in contact with each other and contact with each other. Since the magnetic resistance due to the unevenness of the surface of the magnetic pole surface 1a in a state where the magnetic pole surface 2b of the fixed iron core 2 is in surface contact and contact is reduced, the magnetic efficiency in the operation of the movable iron core 1 is improved. The electromagnetic force to be attracted to the fixed iron core 2 is increased, the attractive force between the movable iron core 1 and the fixed iron core 2 is improved, the operation performance as an electromagnet device is improved, and the beat sound can be eliminated.

  Thus, the magnetic fluid 5 arranged on the magnetic pole surface 1a of the movable iron core 1 softens the collision between the magnetic pole surface 1a of the movable iron core 1 and the magnetic pole surface 2a of the fixed iron core 2 by the viscous resistance of the magnetic fluid 5, and the magnetic pole surface The operation sound and beat sound of the electromagnet device 100 when the surface 1a and the magnetic pole surface 2a collide can be eliminated. Similarly, the magnetic fluid 5 disposed on the magnetic pole surface 1b of the movable iron core 1 softens the collision between the magnetic pole surface 1b of the movable iron core 1 and the magnetic pole surface 2b of the fixed iron core 2 by the viscous resistance of the magnetic fluid 5, and the magnetic pole surface The operation sound and beat sound of the electromagnet device 100 when 1b collides with the magnetic pole surface 2b can be eliminated.

  In the gap 15, a barrier layer 7 that prevents diffusion of the magnetic fluid 5 is provided in close contact with each facing surface of the adjacent first electric iron plate 10 in a region adjacent to the holding region 16. . That is, the holding region 16 is partitioned by the barrier layer 7 in the gap 15. Thus, by providing the barrier layer 7 in the area | region around the holding | maintenance area | region 16 in the clearance gap 15 in the surface of the 1st electric iron plate 10 in the clearance gap 15 in the direction away from magnetic pole surface 1a, 1b, ie, magnetic pole surface 1a, It is possible to prevent the magnetic fluid 5 from diffusing from 1b into the movable iron core 1. That is, by providing the barrier layer 7 in the gap 15, it is possible to prevent the magnetic fluid 5 from diffusing from the holding region 16 to the region beyond the barrier layer 7 in the plane of the first electric iron plate 10.

  In the electromagnet apparatus 100, the magnetic fluid 5 is prevented from diffusing from the holding region 16 to the main body 11 side by providing the barrier layer 7 on the main body 11 side from the holding region 16 in the gap 15. Further, in the electromagnet device 100, the barrier layer 7 is provided on the side surface side of the first leg portion 12 and the side surface side of the second leg portion 13 from the holding region 16, so that the first leg portion 12 extends from the holding region 16. The magnetic fluid 5 can be prevented from diffusing to the side surface side and the side surface side of the second leg portion 13.

  When the barrier layer 7 is not present, the magnetic fluid 5 diffuses into the back of the gap 15 due to capillary action as the electromagnet device 100 is repeatedly turned on and opened, and the magnetic fluid 5 is poled 1a. , 1b occurs for a long time.

  In the electromagnet device 100, the barrier layer 7 prevents the magnetic fluid 5 from diffusing in the gap 15 in the direction away from the magnetic pole surfaces 1a and 1b in the plane of the first electric iron plate 10, so that the magnetic pole surfaces 1a and 1b hold the gap. The magnetic fluid 5 is prevented from being reduced or eliminated. Thereby, in the electromagnet apparatus 100, the magnetic fluid 5 can be held on the magnetic pole surfaces 1a and 1b of the movable iron core 1 for a long period of time.

  And the magnetic fluid 5 arrange | positioned at the magnetic pole surfaces 1a and 1b of the movable iron core 1 adheres also to the magnetic pole surfaces 2a and 2b of the fixed iron core 2 by repeating charging operation and opening operation of the electromagnet device 100, It has the effect of filling in the fine irregularities present on the magnetic pole surfaces 1a, 1b of the movable iron core 1 and the magnetic pole surfaces 2a, 2b of the fixed iron core 2. That is, as shown in FIG. 4, the magnetic pole surfaces 2a and 2b of the fixed iron core 2 are also flattened by eliminating the irregularities by filling the irregularities on the surfaces of the magnetic pole surfaces 2a and 2b with the magnetic fluid 5. As a result, the attractive force between the movable iron core 1 and the fixed iron core 2 in the state where the magnetic pole surfaces mentioned above are in surface contact with each other on the fixed iron core 2 side as well as the movable iron core 1 side is improved. The operation performance as the electromagnet device 100 is improved, and the effect of eliminating the beat sound is obtained.

  The barrier layer 7 is made of a nonmagnetic material. In addition, by using a material having a property of repelling the magnetic fluid 5 as the nonmagnetic material constituting the barrier layer 7, the effect of preventing the diffusion of the magnetic fluid 5 is further enhanced. The barrier layer may be a ferromagnetic material.

  In the first embodiment, the barrier layer 7 is made of a heat-meltable adhesive that is a nonmagnetic material and is an adhesive that melts with heat. By configuring the barrier layer 7 with a heat-meltable adhesive, it is possible to simultaneously form the barrier layer 7 and fix the first electric iron plates 10 to each other, as will be described later.

  In the magnetic pole surface 1 a and the magnetic pole surface 1 b of the movable iron core 1, the color of the appearance of the region where the magnetic fluid 5 is disposed is the color of the magnetic fluid 5. For example, when the color of the magnetic fluid 5 is black, the appearance of the region where the magnetic fluid 5 is arranged on the magnetic pole surface 1a and the magnetic pole surface 1b that are smooth and have a silver-based gloss is as follows. It becomes black which is the color of 5.

  Next, the operation of the electromagnet device 100 according to the first exemplary embodiment will be described. When an alternating voltage is applied to the exciting coil 4 wound around the bobbin 3 during the closing operation, a magnetic attractive force is generated between the movable iron core 1 and the fixed iron core 2 by the magnetic flux generated by the exciting coil 4. . Therefore, the movable iron core 1 is attracted to the fixed iron core 2 against the spring load of the spring 8, the magnetic pole surface 1 a of the movable iron core 1, the magnetic pole surface 2 a of the fixed iron core 2, and the magnetic pole surface 1 b of the movable iron core 1. The magnetic pole surface 2b of the fixed iron core 2 comes into contact with and is attracted. Further, during the opening operation, when the AC voltage applied to the exciting coil 4 is removed, the magnetic attractive force disappears, and the magnetic force 1a of the movable iron core 1 and the magnetic pole surface 2a of the fixed iron core 2 are resisted by the spring 8. And the magnetic pole surface 1b of the movable iron core 1 and the magnetic pole surface 2b of the fixed iron core 2 are separated. In FIGS. 1 and 2, the reciprocating direction of the movable iron core 1 during the closing operation and the opening operation corresponds to the direction of the arrow B.

  Next, a method for manufacturing the electromagnet device 100 will be described. First, a method for manufacturing the movable iron core 1 will be described. FIG. 5 is a flowchart showing a procedure of a method for manufacturing the movable iron core 1 in the electromagnet device 100 according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view of a main part showing a state in which the heat-meltable adhesive 7a is disposed on the first electric iron plate 10 in the manufacture of the movable iron core 1 according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view of a main part showing a state in which the first electric iron plate 10 is laminated in the manufacture of the movable iron core 1 according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view of main parts showing a state in which the barrier layer 7 is formed in the gap 15 in the manufacture of the movable iron core 1 according to the first embodiment of the present invention.

  First, in step S10, as shown in FIG. 6, the barrier layer 7 surrounding the holding region 16 on the surface of each first electric iron plate 10 used in the movable iron core 1 facing the other first electric iron plate 10 is formed. A heat-meltable adhesive 7a, which is an adhesive that melts by heat, is disposed in a desired formation region. The heat-meltable adhesive 7a has a function as the barrier layer 7 and a function as an adhesive for fixing the first electric iron plates 10 to each other. For example, a film of the heat-meltable adhesive 7 a provided in the shape of the barrier layer 7 in the plane of the first electric iron plate 10 is attached to the area around the holding area 16.

  Next, in step S20, as shown in FIG. 7, the several 1st electric iron board 10 with which the film of the heat-meltable adhesive 7a is arrange | positioned is laminated | stacked. As a result, the heat-meltable adhesive 7 a is disposed in the gap 15 between the adjacent first electric iron plates 10.

  Next, in step S30, the plurality of stacked first electric iron plates 10 are heated. Thereby, the barrier layer 7 is formed in the gap 15 as shown in FIG. The heat-meltable adhesive 7 a is once melted by being heated and solidified by being cooled to fix the adjacent first electric iron plates 10 to each other and to become the barrier layer 7. Further, the barrier layer 7 is in close contact with each of the adjacent first electric iron plates 10 in the gap 15. Thereby, the formation of the barrier layer 7 at a desired position in the gap 15 and the firmness between the first electric iron plates 10 in which the displacement of the first electric iron plates 10 due to the adhesion by the heat-meltable adhesive 7a is prevented. Can be simultaneously performed.

  Next, in step S <b> 40, the magnetic fluid 5 is applied to the magnetic pole surfaces 1 a and 1 b of the movable iron core 1. Thereby, the magnetic fluid 5 applied to the magnetic pole surfaces 1a and 1b is held on the magnetic pole surface 1a of each first electric iron plate 10 as shown in FIG. It is sucked and held by capillarity in a region adjacent to the magnetic pole surfaces 1a and 1b in the gap. Thereby, the magnetic fluid 5 is arrange | positioned in the clearance gap between the magnetic pole surface 1a in the 1st electric iron plate 10, and the 1st electric iron plate 10 adjacent.

  The movable iron core 1 is formed by the above processing.

  Next, the fixed iron core 2 is formed. The fixed iron core 2 can be formed by a method similar to the method for manufacturing the movable iron core 1 described above. By forming the movable iron core 1 by the same method as the method for manufacturing the movable iron core 1, the magnetic fluid 5 on the surface of each of the second electric iron plates 20 constituting the fixed iron core 2 as in the case of the movable iron core 1 is capillary action. The fixed iron core 2 having a structure in which the barrier layer 7 is provided around the holding region 16 held by can be formed. Note that the fixed iron core 2 may be formed by fixing a plurality of stacked second electric iron plates 20 by fastening with rivets.

  Next, the bobbin 3 around which the exciting coil 4 is wound is fitted into the third leg portion 24 of the fixed iron core 2 and fixed. The method for fixing the bobbin 3 is not particularly limited. Next, the spring 8 is fitted and fixed to the third leg portion 14 of the movable iron core 1. The method for fixing the spring 8 is not particularly limited. And the electromagnet apparatus 100 is obtained by arrange | positioning the movable iron core 1 and the fixed iron core 2 in the state where the magnetic pole surfaces of the movable iron core 1 and the fixed iron core 2 face each other. In addition, the order of the process of fixing the bobbin 3 around which the exciting coil 4 is wound and the process of fixing the spring 8 does not matter.

  As described above, in the electromagnet apparatus 100 according to the first embodiment, since the movable iron core 1 and the fixed iron core 2 are laminated iron cores, the movable iron core 1 is fixed to the fixed iron core by reducing eddy current loss generated inside the iron core. The electromagnetic force to be attracted to 2 is improved.

  The electromagnet device 100 includes the barrier layer 7 so that the magnetic fluid 5 can be held on the magnetic pole surfaces 1 a and 1 b of the movable iron core 1 for a long period of time. As a result, the electromagnet device 100 operates and beats the electromagnet device 100 when the magnetic pole surfaces of the movable iron core 1 and the fixed iron core 2 collide with the magnetic fluid 5 disposed on the magnetic pole surfaces 1a and 1b of the movable iron core 1. It is possible to provide a high-quality electromagnet device that can maintain the effect of eliminating the problem over a long period of time.

  Further, in the electromagnet device 100, the magnetic fluid 5 fills the irregularities of the magnetic pole surfaces of the movable iron core 1 and the fixed iron core 2, so that the attractive force between the movable iron core 1 and the fixed iron core 2 is improved. As a result, the operation performance is improved. And since the electromagnet apparatus 100 does not provide the concave grooves or the through holes on the magnetic pole surfaces 1a and 1b of the movable iron core 1, the magnetic fluid 5 whose magnetic permeability is greatly inferior to the movable iron core 1 is formed in the concave grooves or the through holes. By being arranged, the magnetic efficiency in the operation of the movable iron core 1 is not lowered.

  Therefore, according to the electromagnet device 100 according to the first exemplary embodiment, an electromagnet device capable of eliminating beat noise for a long period of time can be obtained, and an electromagnet device with improved quality and operational performance can be provided.

Embodiment 2. FIG.
FIG. 9 is a longitudinal sectional view of the electromagnet device 200 according to the second embodiment of the present invention, and corresponds to FIG. The electromagnet device 200 is different from the electromagnet device 100 according to the first embodiment described above in that it has a holding region 17 instead of the holding region 16 and a barrier layer 71 instead of the barrier layer 7. The holding area 17 of the electromagnet device 200 is different in shape in the plane of the holding area 16 of the electromagnet device 100 and the first electric iron plate 10. The barrier layer 71 of the electromagnet device 200 is different in shape from the barrier layer 7 of the electromagnet device 100.

  That is, when the holding region 17 is viewed along the laminating direction of the first electric iron plate 10, that is, in a cross-sectional view viewed along the laminating direction of the first electric iron plate 10, the movable iron core 1 is fixed to the fixed iron core 2. The holding region 16 is different from the holding region 16 in that the shape is a rectangular shape that is convex in a direction away from the holding area. Therefore, the barrier layer 71 has a part of the outer shape of the magnetic pole surfaces 1a and 1b facing in a direction in which the movable iron core 1 is separated from the fixed iron core 2 when viewed along the stacking direction of the first electric iron plate 10. The barrier layer 7 is different from the barrier layer 7 in that it has a convex shape. In the plane of the first electric iron plate 10, the maximum length of the depth perpendicular to the magnetic pole surfaces 1 a and 1 b in the holding region 17 is the same as that of the holding region 16. Further, the width along the magnetic pole surfaces 1 a and 1 b in the holding region 17 is the same as that of the barrier layer 7 in the plane of the first electric iron plate 10.

  Under the condition that the maximum length and the width of the depth are the same, the area of the holding region 17 having a semicircular shape is smaller than the area of the holding region 16 having a rectangular shape in the plane of the first electric iron plate 10. Become. Therefore, the amount of magnetic fluid 5 that can be held in the gap 15 of the electromagnet device 200 is smaller than the amount of magnetic fluid 5 that can be held in the gap 15 of the electromagnet device 100, and the amount of magnetic fluid 5 used is small. I'll do it.

  The electromagnet device 200 described above has the same effect as the electromagnet device 100 according to the first embodiment. Moreover, since the electromagnet apparatus 200 can reduce the usage-amount of the magnetic fluid 5 compared with the electromagnet apparatus 100 concerning Embodiment 1, it can suppress manufacturing cost compared with the electromagnet apparatus 100. FIG.

Embodiment 3 FIG.
FIG. 10 is a longitudinal sectional view of an electromagnet device 300 according to Embodiment 3 of the present invention, and corresponds to FIG. The electromagnet device 300 is different from the electromagnet device 100 according to the first embodiment described above in that the barrier layer 7 has the protruding portion 72. The projecting portion 72 is adjacent to the magnetic pole surfaces 1a and 1b of the movable core 1 that project in a direction facing each other in the direction perpendicular to the stacking direction of the first electric iron plate 10 and the reciprocating direction of the movable core 1 by electromagnetic force. It is a protrusion. That is, by having the protrusion 72, the barrier layer 7 has a C shape in which a part of the region adjacent to the magnetic pole surfaces 1 a and 1 b of the movable iron core 1 is opened in the plane of the first electric iron plate 10.

  When the barrier layer 7 has the projecting portion 72, the electromagnetic device 100 is installed so that the left or right side in FIG. 10 faces downward and the direction of the reciprocating motion of the movable core 1 by electromagnetic force is horizontal. However, the magnetic fluid 5 can be prevented from leaking from the gap 15, and the magnetic fluid 5 can be held on the magnetic pole surfaces 1 a and 1 b of the movable iron core 1 for a long period of time. That is, the protrusion 72 functions as a leak stopper for the magnetic fluid 5.

  The electromagnet device 300 described above has the same effect as the electromagnet device 100 according to the first embodiment. Further, even when the electromagnet device 300 is installed so that the reciprocating motion of the movable iron core 1 by the electromagnetic force is directed horizontally, the electromagnet device 300 is provided with the magnetic fluid 5 on the magnetic pole surfaces 1a and 1b of the movable iron core 1 for a long time. Thus, the effect of eliminating the operation sound and beat sound of the electromagnet device 300 can be maintained for a long time.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Movable iron core, 1a, 1b, 2a, 2b Magnetic pole surface, 2 Fixed iron core, 3 Bobbin, 4 Excitation coil, 5 Magnetic fluid, 6 Winding coil, 7, 71 Barrier layer, 7a Heat-meltable adhesive, 8 Spring, 10 1st electric iron plate, 11, 21 body part, 12, 22 1st leg part, 13, 23 2nd leg part, 14, 24 3rd leg part, 15 clearance, 16, 17 holding area, 20th 2 electric iron plates, 72 protrusions, 100, 200, 300 electromagnet device.

Claims (8)

A fixed iron core,
Facing the fixed iron core, reciprocating in the direction approaching the fixed iron core and in the direction away from the fixed iron core is possible, and a plurality of iron plates are stacked in a direction perpendicular to the reciprocating movement direction. A movable iron core,
A spring that pushes the movable iron core away from the fixed iron core;
An excitation coil that generates an electromagnetic force during excitation that draws the movable iron core toward the fixed iron core against the spring load of the spring to bring the magnetic pole surface of the movable iron into contact with the magnetic pole surface of the fixed iron;
A magnetic fluid disposed on the magnetic pole surface of the movable iron core and a region adjacent to the magnetic pole surface of the movable iron core in a gap between the adjacent iron plates;
A barrier layer disposed in the gap in close contact with each of the adjacent iron plates, and preventing diffusion of the magnetic fluid in the gap;
An electromagnet device comprising: The barrier layer is made of a non-magnetic material;
The electromagnet device according to claim 1. The barrier layer is made of a heat-meltable adhesive and is used to fix the adjacent iron plates together,
The electromagnet device according to claim 2. The barrier layer defines a holding region in which the magnetic fluid is held in the gap, and in the cross-sectional view seen along the stacking direction of the iron plates, the holding core has the movable iron core separated from the fixed iron core. It is a rectangular shape that is convex in the direction of leaving,
The electromagnet device according to any one of claims 1 to 3. The barrier layer defines a holding region in which the magnetic fluid is held in the gap, and a part of a region adjacent to the magnetic pole surface of the movable iron core is opened in the surface of the iron plate. Having a modified C shape,
The electromagnet device according to any one of claims 1 to 3. The irregularities on the surface of the magnetic pole surface of the fixed iron core are filled with magnetic fluid,
The electromagnet device according to any one of claims 1 to 5. A movable iron core comprising a fixed iron core and a structure in which a plurality of iron plates are stacked in a direction perpendicular to the reciprocating movement direction, wherein the reciprocating movement is possible in a direction approaching the fixed iron core and a direction away from the fixed iron core. A method of manufacturing an electromagnet device comprising:
Forming the movable iron core;
Disposing a magnetic fluid between the magnetic pole surface of the movable iron core and a region adjacent to the magnetic pole surface of the movable iron core in a gap between the adjacent iron plates;
Forming the fixed iron core;
Fixing a spring that pushes the movable iron core in a direction away from the fixed iron core to the movable iron core;
An excitation coil that generates an electromagnetic force during excitation by attracting the movable iron core toward the fixed iron core against the spring load of the spring against the fixed iron core to bring the magnetic pole surface of the movable iron core into contact with the magnetic pole surface of the fixed iron core Fixing the
A step of disposing the fixed iron core and the movable iron core so that the magnetic pole surface of the fixed iron core and the magnetic pole surface of the movable iron core face each other;
Including
The step of forming the movable iron core includes
A barrier layer for preventing diffusion of the magnetic fluid is disposed in a region surrounding the holding region where the magnetic fluid is held in the gap between the adjacent iron plates on the surface of the plurality of iron plates facing the other iron plate. Process,
Laminating the plurality of iron plates on which the barrier layers are disposed;
Fixing the plurality of stacked iron plates, and in close contact with each of the adjacent iron plates in the gap between the adjacent iron plates;
The manufacturing method of the electromagnet apparatus characterized by having. The barrier layer is made of a heat-meltable adhesive and fixes the adjacent iron plates;
The method of manufacturing an electromagnet device according to claim 7.

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