WO2018048103A1

WO2018048103A1 - Electromagnetic sealing apparatus and plating equipment including same

Info

Publication number: WO2018048103A1
Application number: PCT/KR2017/008554
Authority: WO
Inventors: 천명식; 장태인; 이원호; 김태규; 이의호; 김상준; 김종익
Original assignee: 주식회사 포스코; 주식회사 파이벡스
Priority date: 2016-09-12
Filing date: 2017-08-08
Publication date: 2018-03-15
Also published as: KR101767842B1

Abstract

An electromagnetic sealing apparatus according to one embodiment of the present invention comprises: a body unit provided at a port for containing a ferro-fluid in which magnetism is formed; and at least one electromagnet unit, which is provided on an inner sidewall part of the body unit having a sealing space so as to seal the sealing space of the body unit communicated through the port and an opening, and is formed to move the magnetic fluid in an opening direction by alternately applying a repulsive force and an attractive force to the magnetic fluid.

Description

Electromagnetic sealing device and plating equipment including the same

The present invention relates to an electromagnetic sealing device and a plating facility including the same.

In the manufacturing process of steel products, a continuous plating process is performed to produce plated steel sheets according to the needs of customers.

In this continuous plating process, the plating solution in the molten state attached to the surface of the steel sheet passed through the plating bath provided with a plating solution such as zinc is cooled to produce a plated steel sheet.

That is, since the plating solution is excessively attached to both surfaces of the steel sheet passing through the plating bath, an air knife is used to form a plating layer having an appropriate thickness, and then the unsolidified zinc solution of about 460 ° C. or more is cooled. As the device solidifies, a plated layer having sufficient strength is formed on the surface of the steel sheet to produce a plated steel sheet.

Particularly, in the plating bath in which molten zinc is contained in a liquid state, a roll shaft unit for moving the steel sheet is provided. The roll shaft unit rotates by friction with the steel sheet according to the transfer of the steel sheet without additional power. It may be configured to provide power.

On the other hand, in order for the roll shaft unit to be provided to rotate in the plating tank, a bearing unit for coupling with the plating tank is required, and in particular, it is configured to prevent molten zinc from penetrating into the bearing unit so as not to lose the function of the bearing unit. It should not be configured.

Conventionally, a structure of a sliding bearing for mounting a sleeve on a shaft member of a roll shaft unit and a brush on a wall of a plating bath has been proposed.

In order to apply such a sliding bearing, it is necessary to properly adjust the gap between the sleeve and the brush, and typically must be configured to prevent abrasion by supplying an appropriate lubricant within the gap.

However, in the sliding bearing used in the molten zinc solution, it is not possible to supply a separate lubricating oil to prevent abrasion, as well as a problem that the molten zinc solution flows between the sleeve and the brush and interferes with the lubrication function.

In addition, when high hardness dross generated by chemical reaction of Zn-Fe-Al penetrates at intervals between bearings, a problem of rapidly progressing abrasion of the shaft member and the bearing due to increased friction also occurs.

Accordingly, as the plating operation proceeds, the gap between the sliding bearings becomes wider, which causes severe vibration in the roll, which causes vibration of the steel sheet, and thus the thickness of the plating layer attached to the plated steel sheet is uniformly formed. There is a problem of thickness deviation.

In addition, an electromagnetic bearing has been introduced to improve such a problem, but such an electromagnetic bearing has a disadvantage in that power consumption is large because only a high load roll shaft unit must be supported by an electromagnetic force.

Therefore, there is a need for a study on an electromagnetic sealing device and a plating facility including the same to solve the above problems.

An object of the present invention is to provide a magnetic sealing device capable of performing the sealing of the magnetic fluid, to prevent the problem caused by the penetration of the magnetic fluid and a plating facility comprising the same.

The electromagnetic sealing device according to an embodiment of the present invention is to seal the sealing unit of the body unit provided in the port containing the magnetic fluid is formed magnetic and the sealing space of the body unit in communication with the port through the opening, Is provided on the inner wall portion of the formed body unit, it may include at least one electromagnet unit configured to move the magnetic fluid in the direction of the opening by alternating force and repulsive force on the magnetic fluid.

In addition, the electromagnet unit of the electromagnetic sealing apparatus according to an embodiment of the present invention, the polarity is alternately changed by a time-varying magnetic field formed by applying an alternating current, a plurality of the body unit in the opening direction in the sealing space It may include an electromagnet member and a current applying member for applying an alternating current to the electromagnet member provided in parallel with the inner wall portion of the.

In addition, the current application member of the electromagnetic sealing apparatus according to an embodiment of the present invention, it may be characterized in that for applying the alternating current so that the neighboring electromagnet members to form different polarities.

In addition, the electromagnet member of the electromagnetic sealing apparatus according to an embodiment of the present invention is provided by winding the core portion and the core portion provided in a shape protruding from the inner wall portion of the body unit, the current applying member And a coil part connected to each other, wherein the core part has a width greater than a coupling end portion opposite to the coupling end portion than the coupling end portion coupled to the inner wall portion of the body unit.

In addition, the facing end portion of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized in that both sides are concavely rounded so as to have a smaller width toward the coupling end direction.

In addition, in the electromagnetic sealing apparatus according to an embodiment of the present invention, the rounded radius of curvature of the facing end may be formed to be smaller than at least half of the width of the coupling end.

In addition, the coil unit of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized in that Y-connected with the current applying member.

In addition, the current applying member of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized by applying an alternating current to the electromagnet member by a PWM (Pulse Width Modulation) driver.

In addition, the current applying member of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized in that for applying a current so that the force acting on the magnetic fluid is 40 ~ 250N.

In addition, the body unit of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized in that it is provided with a nonmagnetic material.

In addition, the electromagnetic sealing apparatus according to an embodiment of the present invention further includes a roll shaft unit inserted into the sealing space and a bearing unit provided inside the sealing space than the electromagnet unit, and the roll shaft unit is inserted and supported. Can be.

In addition, the bearing unit of the electromagnetic sealing apparatus according to an embodiment of the present invention, it may be characterized in that provided with a rolling bearing.

In addition, the bearing unit of the electromagnetic sealing apparatus according to an embodiment of the present invention, the outer ring member coupled to the body unit, the roll shaft unit is inserted, the inner ring member and the outer ring member which is provided inside the outer ring member and It may include a ball member provided between the inner ring member.

In addition, the ball member of the electromagnetic sealing device according to an embodiment of the present invention, it may be characterized in that provided with a zirconia-based material or a ceramic material.

In addition, the roll shaft unit of the electromagnetic sealing apparatus according to an embodiment of the present invention, the roll member provided on the conveying path of the steel sheet and the roll member is coupled in the axial direction, is inserted into the sealing space, the non-magnetic material It may include a shaft member provided.

In addition, the roll shaft unit of the electromagnetic sealing apparatus according to an embodiment of the present invention may further include a cap member fitted to an outer surface of the shaft member and provided as a diamagnetic material.

In addition, the current applying member of the electromagnetic sealing device according to an embodiment of the present invention, characterized in that the alternating current applied to the electromagnet member facing each other around the shaft member to form the same polarity.

In addition, the electromagnet member of the electromagnetic sealing apparatus according to an embodiment of the present invention may be characterized in that the gap with the roll shaft unit to form a 0.2 ~ 10mm.

In addition, the electromagnetic sealing apparatus according to an embodiment of the present invention may include a cooling unit for flowing the cooling fluid to the cooling tube provided in the body unit around the electromagnet unit.

In addition, the plating equipment according to another embodiment of the present invention includes a plating bath provided as a port containing a magnetic fluid of molten zinc and the electromagnetic sealing device provided in the plating bath, the steel plate immersed in the molten zinc of the plating bath The movement may be guided by the roll shaft unit provided in the body unit of the electromagnetic sealing device.

In addition, the roll shaft unit of the plating equipment according to another embodiment of the present invention may be characterized in that the sink roll, correcting roll or stabilizing roll.

Electromagnetic sealing apparatus of the present invention and the plating equipment comprising the same may have the advantage that the sealing of the magnetic fluid can be carried out in a non-contact.

As a result, when the roll shaft unit is supported by the bearing unit, it is possible to prevent the magnetic fluid from penetrating between the roll shaft unit and the bearing unit, and foreign matter such as dross is formed between the roll shaft unit and the bearing unit. It will have the advantage of preventing.

Accordingly, the roll shaft unit can prevent the occurrence of friction during the support by the bearing unit, thereby preventing the vibration during the support of the steel sheet, thereby improving the plating quality, and it is possible to perform the high speed work and greatly improve the productivity. do.

In addition, since the roll shaft unit is contacted and supported by the bearing unit, the roll shaft unit having a high load does not need to be non-contacted supported by the electromagnetic force, so that the power consumption can be reduced as compared with the conventional electromagnetic bearing apparatus. .

However, the effects derived from the present invention are not limited to the above-described effects, and any effects not described above may be used as the effects derived from the technical contents of the present invention.

1 is a side view showing a plating facility of the present invention.

2 is a front view showing an electromagnetic sealing apparatus of the present invention.

Figure 3 is a front view showing the operating state of the sealing action of the electromagnetic sealing device of the present invention when the magnetic fluid is ferromagnetic, paramagnetic.

Figure 4 is a front view showing the operating state of the sealing action of the electromagnetic sealing device of the present invention, when the magnetic fluid is a diamagnetic material.

5 is a front view showing an operating state of the supporting action of the electromagnetic sealing device of the present invention.

6 is a front view showing an electromagnet member in the electromagnetic sealing apparatus of the present invention.

7 is a perspective view showing an electromagnet member in the electromagnetic sealing apparatus of the present invention.

FIG. 8 is a front view of the electromagnetic sealing apparatus of the present invention in which the electromagnet member is Y-connected with the current applying member for applying an alternating current by a PWM driver.

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention may deteriorate other inventions or the present invention by adding, modifying, or deleting other elements within the scope of the same idea. Other embodiments that fall within the scope of the inventive concept may be readily proposed, but they will also be included within the scope of the inventive concept.

In addition, the components with the same functions within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

The present invention relates to an electromagnetic sealing device (1) and to a plating facility including the same, it is possible to perform the sealing of the magnetic fluid (L) in a non-contact.

That is, the present invention can perform the sealing of the magnetic fluid (L), to prevent the problem caused by the penetration of the magnetic fluid (L), and thus the roll shaft unit 300 is supported by the bearing unit 400 As a technique for preventing friction, improving the plating quality by preventing vibration when supporting the steel sheet, and reducing power consumption since the support of the roll shaft unit 300 of high load does not have to be performed solely by electromagnetic force. It is presented.

This is to prevent the molten zinc from penetrating into the bearing unit 400 for rotatably coupling the roll shaft unit 300 in the plating bath, it is possible to maintain without losing the function of the bearing unit 400 .

That is, when the roll shaft unit 300 is supported by the bearing unit 400, the magnetic fluid (L) can be prevented from penetrating between the roll shaft unit 300 and the bearing unit 400, the roll shaft unit ( It is possible to prevent the problem that the foreign matter such as dross is formed between the 300 and the bearing unit 400.

Accordingly, the roll shaft unit 300 prevents the occurrence of friction during the support by the bearing unit 400, thereby preventing the vibration during the support of the steel sheet to induce the thickness of the plating layer to be formed to improve the plating quality. It is possible to work at a high speed, thereby greatly improving the productivity.

On the other hand, the present invention, because the bearing unit 400 is in contact support for the roll shaft unit 300, the power consumption compared to the conventional electromagnetic bearing device for non-contact support of the high load roll shaft unit 300 by the electromagnetic force It can also significantly alleviate.

This will be described in more detail with reference to the accompanying drawings.

First, Figure 1 is a side view showing a plating equipment of the present invention, referring to this, the plating equipment according to another embodiment of the present invention is a plating bath provided as a port (2) containing the magnetic fluid (L) is molten zinc And an electromagnetic sealing apparatus 1 to be described later provided in the plating bath, wherein the steel plate immersed in the molten zinc of the plating bath is in the roll shaft unit 300 provided in the body unit 100 of the electromagnetic sealing device 1. It can be characterized in that the movement is guided by.

As described above, the electromagnetic sealing apparatus 1 of the present invention, which will be described later, is provided in a plating facility to allow molten zinc to penetrate into the gap G between the roll shaft unit 300 and the bearing unit 400 for guiding the movement of the steel sheet. To prevent this from happening.

However, the electromagnetic sealing apparatus 1 of the present invention is not limited to that used in the plating equipment, and any equipment may be used as long as the port 2 in which the magnetic fluid L such as molten zinc is contained.

The plating bath serves to form a plating layer with a plating solution such as molten zinc on the steel sheet for the plating operation of the steel sheet.

To this end, the plating bath is provided containing a molten zinc, such as a plating solution, the roll shaft unit 300 for the movement of the steel sheet is provided in combination.

Here, the roll shaft unit 300 supports the movement of the steel sheet, and also serves to guide the movement of the steel sheet.

In particular, the roll shaft unit 300 is a pot roll provided in the plating bath, and may be a sink roll, a correcting roll, or a stabilizing roll.

That is, the roll shaft unit 300 of the plating equipment according to another embodiment of the present invention may be characterized in that the sink roll, correcting roll or stabilizing roll.

The electromagnetic sealing device 1 serves to prevent the plating solution, such as molten zinc, from penetrating when the roll shaft unit 300 coupled to the plating bath is coupled to the plating bath. A more detailed description will be described later with reference to FIGS. 2 to 8.

FIG. 2 is a front view showing the electromagnetic sealing apparatus 1 of the present invention, and FIG. 3 shows an operating state of the sealing action of the electromagnetic sealing apparatus 1 of the present invention when the magnetic fluid L is ferromagnetic or paramagnetic. 4 is a front view showing an operating state of the sealing action of the electromagnetic sealing device 1 of the present invention when the magnetic fluid L is a diamagnetic material.

2 to 4, the electromagnetic sealing apparatus 1 according to the exemplary embodiment of the present invention includes a body unit 100 provided in a port 2 provided to contain a magnetic fluid L in which magnetism is formed. And an inner wall portion 120 of the body unit 100 in which the sealing space is formed to seal the sealing space of the body unit 100 communicated through the port 2 and the opening tool 110. At least one electromagnet unit 200 for moving the magnetic fluid L toward the opening 110 by alternating attraction and repulsive force acting on the magnetic fluid L by a time-varying magnetic field formed by applying an alternating current. ) May be included.

In other words, the principle of discharging the magnetic fluid (L) in the sealing space for the purpose of sealing is due to the occurrence of alternating attraction and repulsive force by the time-varying magnetic field.

As an example, the sealing operation in the case where the magnetic fluid L, which is the object of sealing, is a ferromagnetic body or a paramagnetic body will be described with reference to FIG. 3. First, an alternating current is applied to the electromagnet unit 200 at a first point of time, and the electromagnet unit ( When the 200 forms the N pole, the magnetic fluid L positioned around the electromagnet unit 200 in which the N pole is formed is ferromagnetic and paramagnetic so that the S pole is formed.

When an alternating current of opposite phase is applied to the electromagnet unit 200 at a second time later, the electromagnet unit 200 again forms an S pole, and the magnetic fluid L charged to the S pole at the first time. Is generated by the electromagnet unit 200 formed in the S pole and the repulsive force to perform the sealing while being pushed away from the electromagnet unit 200.

As another example, the sealing operation in the case where the magnetic fluid L, which is the object of sealing, is a diamagnetic substance will be described with reference to FIG. 4. First, an alternating current is applied to the electromagnet unit 200 at a first point of time so that the electromagnet unit 200 When N) forms an N pole, the magnetic fluid L positioned around the electromagnet unit 200 in which the N pole is formed is semi-magnetic and thus is formed as an N pole having the same polarity.

Therefore, from the first time point, the magnetic fluid L forms a repulsive force with the electromagnet unit 200 and performs sealing while being pushed away from the electromagnet unit 200.

In this case, the same action for sealing is also performed at the second time point. That is, when the electromagnet unit 200 forms the S pole at the second time point, the magnetic fluid L located around the electromagnet unit 200 in which the S pole is formed is semi-magnetic and thus is formed of the S pole having the same polarity. In addition, the magnetic fluid (L) forms a repulsive force with the electromagnet unit 200, it is to perform the sealing while being pushed away from the electromagnet unit 200.

The body unit 100 serves to be provided with the electromagnet unit 200, in particular provided in the port (2) containing the magnetic fluid (L). Thereafter, the body unit 100 includes a roll shaft unit 300, a bearing unit 400, etc. in addition to the electromagnet unit 200, and the roll shaft unit 300 and the bearing unit 400 are provided in the electromagnet unit 200. Can be supported while sealing.

In addition, the magnetic fluid L contained in the port 2 provided with the body unit 100 is a material capable of forming magnetism and should be distinguished from a nonmagnetic material.

That is, the magnetic fluid (L) is to be provided as a material of a ferromagnetic material, a paramagnetic material forming a polarity opposite to the external magnetic field, or a material of a diamagnetic material forming the same polarity as the external magnetic field.

In particular, the molten zinc (Zn) used in the plating equipment is a diamagnetic material, a material forming the same polarity as the magnetic field formed, may be included in the magnetic fluid (L).

In addition, the body unit 100 is composed of a nonmagnetic material that does not affect the magnetic field to secure the control accuracy when the electromagnet unit 200 forms a magnetic field to apply a force to the magnetic fluid (L), This is preferred.

That is, the body unit 100 of the electromagnetic sealing device 1 according to an embodiment of the present invention may be provided as a nonmagnetic material.

As an example, the body unit 100 may be formed of a nonmagnetic material such as stainless steel, ceramic, titanium, and Inconel. Moreover, these materials are also desirable as materials having low heat resistance and low thermal expansion coefficient that can withstand high temperature plating bath environments of about 500 ° C or higher.

In addition, the body unit 100 may be formed of boronite (BN) to increase the corrosion resistance.

The electromagnet unit 200 performs the interaction between the magnetic fluid (L) and the attraction force and repulsive force, thereby pushing the magnetic fluid (L) to perform a sealing action.

In other words, the electromagnet unit 200 is configured to form a time-varying magnetic field by an alternating current, and in particular, pushes the magnetic fluid L toward the opening 110 in the sealing space of the body unit 100. Sealing the sealing space.

To this end, the electromagnet unit 200 may include an electromagnet member 210 and a current applying member 220.

That is, the electromagnet unit 200 of the electromagnetic sealing device 1 according to an embodiment of the present invention is alternately changed in polarity by a time-varying magnetic field formed by applying an alternating current, and the opening tool inside the sealing space ( A plurality in the direction 110) includes an electromagnet member 210 disposed side by side on the inner wall part 120 of the body unit 100 and a current applying member 220 for applying an alternating current to the electromagnet member 210; The current applying member 220 may be characterized by applying an alternating current so that neighboring electromagnet members 210 form different polarities.

As described above, the current applying member 220 applies an alternating current to alternately form the N pole and the S pole in the electromagnet member 210 to alternately apply attraction force and repulsive force to the magnetic fluid L. Magnetic fluid (L) can be pushed in the direction of the opening 110 in the sealing space of the body unit 100.

In particular, in order to increase the efficiency of pushing the magnetic fluid (L), a plurality of electromagnet members 210 may be provided side by side in the direction of the opening hole 110 in the sealing space.

In other words, one of the first electromagnet members 210 is formed as the N pole at the first point of time, and the magnetic fluid L facing it is charged to the S pole, and the first electromagnet member 210 is placed at the second point of time. The second electromagnet member 210 which is formed as a pole and is provided adjacent to the first electromagnet member 210 when the magnetic fluid L and the repulsive force charged to the S pole at the first point is moved to the N pole. Since it is formed by, the magnetic fluid (L) of the S pole and the attraction force can further increase the moving force of the magnetic fluid (L).

That is, the magnetic fluid L is pushed by the repulsive force with the first electromagnet member 210 at the second time point, and attracts the magnetic fluid L with the second electromagnet member 210 by attracting force. It is possible to form a larger force to move in the direction of the opening (110).

On the other hand, although the above description is a case where the magnetic fluid (L) is a ferromagnetic material, a paramagnetic material, even when the magnetic fluid (L) is a diamagnetic material, the electromagnet member (210) adjacent to the force to move the magnetic fluid (L) The bigger point is the same.

That is, when the magnetic fluid (L) is a diamagnetic material, the magnetic fluid (L) also forms the N pole at the first time when the first electromagnet member (210) is formed as the N pole, repulsive force with the first electromagnet member (210) In this case, the second electromagnet member 210 adjacent to the first electromagnet member 210 is formed in the S pole, thereby acting on the magnetic fluid (L) charged to the N pole, the magnetic fluid, It is possible to form a greater force to move (L).

The electromagnet member 210 may be more specifically composed of the core portion 211, the coil portion 212, by providing the shape in a specific shape, it is possible to increase the efficiency of the sealing action by the formation of electromagnetic force, Detailed description thereof will be described later with reference to FIG. 6.

In addition, the current applying member 220 serves to alternately form an N pole and an S pole in the electromagnet member 210 by applying an alternating current to the electromagnet member 210.

In addition, the strength of the force acting on the magnetic fluid L by the electromagnet member 210 may be adjusted according to the intensity of the alternating current applied by the current applying member 220.

In particular, the force of the electromagnet member 210 acting on the magnetic fluid (L) should be provided more than the force to the magnetic fluid (L) to overcome the external force and move from the sealing space to the opening (110). do.

That is, the current applying member 220 of the electromagnetic sealing device 1 according to an embodiment of the present invention is characterized in that to apply a current so that the force acting on the magnetic fluid (L) is 40 ~ 250N. can do.

This is because in order to discharge the magnetic fluid (L) from the sealing space to overcome the force against the hydrostatic pressure acting on the magnetic fluid (L) in accordance with the depth of the magnetic fluid (L), to act a greater force than that The scope is presented.

In other words, in the plating bath, the numerical value of applying magnetic force to the magnetic fluid L is greater than 40 to 250 N than the force acting on the magnetic fluid L at the depth provided with the sink roll, the correcting roll, or the stabilizing roll. will be.

In addition, the current applying member 220 may be coupled to the electromagnet member 210 by a Y connection, or may apply an alternating current by a PWM driver, which will be described later with reference to FIGS. 7 and 8.

The electromagnetic sealing device 1 of the present invention includes a bearing unit 400 and a roll shaft unit 300 supported by contact with the bearing unit 400 in the sealing space, and thus the bearing unit 400 and the roll shaft unit. Foreign matter such as dross is formed between the 300 or the magnetic fluid (L) can be prevented from causing a friction problem.

In other words, the electromagnetic sealing apparatus 1 according to an embodiment of the present invention is provided inside the sealing space than the roll shaft unit 300 and the electromagnet unit 200 inserted into the sealing space, and the roll shaft unit ( 300 may further include a bearing unit 400 is inserted and supported.

As described above, since the present invention includes the electromagnetic sealing device 1, it is not necessary to consider the problem of the magnetic fluid L penetrating between the roll shaft unit 300 and the bearing unit 400. The bearing unit 400 may be configured to support the roll shaft unit 300 in contact support.

That is, while the conventional non-contact support device, the electromagnetic bearing device requires a lot of power consumption in order to support the high load of the roll shaft unit 300, the present invention provides a magnetic fluid while being in contact with the roll shaft unit 300 Since the problem caused by (L) can be prevented by the electromagnetic sealing apparatus 1, the roll shaft unit 300 can be stably supported even with relatively low power consumption.

To this end, the bearing unit 400 should be provided inside the sealing space than the electromagnet unit 200.

In addition, the bearing unit 400 is preferably provided with a rolling bearing in order to support the roll shaft unit 300 in contact.

That is, the bearing unit 400 of the electromagnetic sealing device 1 according to an embodiment of the present invention may be provided as a rolling bearing.

However, the electromagnetic sealing device 1 of the present invention is not limited to a rolling bearing which is a contact bearing, but can also be applied to a non-contact bearing such as an electromagnetic bearing device.

In addition, the bearing unit 400 is preferably provided as an oilless bearing because the bearing unit 400 is provided inside the port 2 in which the magnetic fluid L is contained. That is, since the oil is not easy to supply, the bearing unit 400 is provided as an oilless bearing.

Such rolling bearings may include ball bearings, roller bearings, and the like, and specific configurations may be proposed as ball bearings in the present invention.

That is, the bearing unit 400 of the electromagnetic sealing device 1 according to an embodiment of the present invention, the outer ring member 410, the roll shaft unit 300 is coupled to the body unit 100 is inserted, It may include an inner ring member 420 provided inside the outer ring member 410 and a ball member 430 provided between the outer ring member 410 and the inner ring member 420.

Here, the inner ring member 420 may be configured to be supported by the ball member 430 between the outer ring member 410, the roll shaft unit 300 is provided in close contact with the outer ring member (410).

More specifically, the shaft member 320 of the roll shaft unit 300 is formed at a lower temperature than the environment inside the port 2 and shrunk, and then inserted into the inner ring member 420 and provided inside the port 2. By thermal expansion, the roll shaft unit 300 can be provided in the inner ring member 420 by thermal fitting.

On the other hand, the ball member 430 of the electromagnetic sealing device 1 according to an embodiment of the present invention, it may be characterized in that provided with a zirconia-based material or a ceramic material.

In this way, the material of the ball member 430 is limited to maintain the durability of the ball member 430 in the port 2 such as a plating bath in a high temperature environment.

In other words, the zircona-based material is a material containing zirconium (Zr), for example ZrO, and the like, and the ceramic material is a metal element such as silicon (Si), aluminum (Al), titanium (Ti) and oxygen As a compound formed by combining carbon, nitrogen, for example, SiO 2 may be used.

Alternatively, the ball member 430 may be provided with carbon fiber having excellent rigidity. In this case, the ball member 430 may be applied as a carbon composite made of long fiber rather than chopped fiber, or graphite. It is preferable to use a material mixed with).

The roll shaft unit 300 is configured to support rotation by the bearing unit 400, and serves to support the steel sheet passing through the plating bath in the plating facility.

To this end, the roll shaft unit 300 may include a roll member 310 and the shaft member 320. Here, the shaft member 320 is inserted into the sealing space is a configuration that is directly supported by the bearing unit 400. In addition, since the shaft member 320 is inserted into the sealing space, the shaft member 320 may be made of a nonmagnetic material so as not to interfere with the sealing action of the electromagnet unit 200.

Such nonmagnetic materials may be stainless steel, ceramics, or the like.

In other words, the roll shaft unit 300 of the electromagnetic sealing apparatus 1 according to the embodiment of the present invention is provided in the axial direction of the roll member 310 and the roll member 310 provided on the transport path of the steel sheet. Coupled to, and inserted into the sealing space, it may include a shaft member 320 is provided with a non-magnetic material.

Here, the roll member 310 is a configuration that serves to support the steel sheet in direct contact with the steel sheet passing through the plating bath.

In addition, the roll shaft unit 300 may further include a cap member 330 in order to further increase the effect of the sealing action of the magnetic fluid (L) by the electromagnet unit 200.

In other words, the roll shaft unit 300 of the electromagnetic sealing apparatus 1 according to an embodiment of the present invention further includes a cap member 330 fitted to an outer surface of the shaft member 320 and provided as a diamagnetic material. can do.

That is, since the cap member 330 is made of a diamagnetic material, since the cap member 330 is formed in the same polarity as the electromagnet member 210, the magnetic fluid (L) located between the cap member 330 and the electromagnet member 210 ) Is influenced by the magnetic force on both sides, so that the force that induces the movement of the magnetic fluid (L) can be made greater.

In addition, the electromagnetic sealing device 1 according to an embodiment of the present invention includes a cooling unit 500 for flowing a cooling fluid to a cooling tube provided in the body unit 100 around the electromagnet unit 200. Can be.

Thus, the cooling unit 500 is provided to stably operate the components of the electromagnetic sealing apparatus 1 in the high temperature environment of the plating bath in the plating facility.

In other words, the electromagnet unit 200 may be provided by adjusting the operating temperature of the electromagnet unit 200 by the cooling unit 500 so that a problem does not occur in generating a magnetic force in a high temperature environment.

To this end, the cooling unit 500 is provided with a cooling tube in which a cooling fluid flows around the electromagnet unit 200.

In addition, the present invention may add a supporting force for supporting the roll shaft unit 300, as well as the sealing action for discharging the magnetic fluid (L) from the sealing space by the electromagnet unit 200. This can be explained with reference to FIG. 5.

That is, FIG. 5 is a front view showing an operating state of a supporting action of the electromagnetic sealing apparatus 1 of the present invention. Referring to this, the current applying member of the electromagnetic sealing apparatus 1 according to the embodiment of the present invention ( 220 may be characterized by applying an alternating current so that the electromagnet members 210 facing each other around the shaft member 320 form the same polarity.

In other words, the magnetic fluid L is sealed by adjusting the current applying member 220 to form the same polarity of the electromagnet member 210 provided in the direction facing each other with respect to the shaft member 320. It can be configured to simultaneously perform the sealing action to discharge from and the support action to support the shaft member (320).

Referring to the operation state of supporting the shaft member 320, the shaft member 320 is fitted with a cap member 330 which is a diamagnetic body, the cap member 330 by the magnetic force of both electromagnet members 210 Will be affected.

In other words, when the electromagnet member 210 of one side forms the N pole, the portion of the cap member 330 facing the same also forms the N pole, and centers the electromagnet member 210 and the shaft member 320 on one side. When the electromagnet member 210 of the other side facing the N-pole also forms a portion of the cap member 330 facing it also forms the N-pole.

In this state, since the cap member 330 receives the same repulsive force on both sides of the shaft member 320 in a direction perpendicular to the shaft member 320, the shaft member 320 is supported in the middle while being supported by a magnetic force. It is.

The supporting action caused by the floating of the shaft member 320 is to disperse the force acting on the contact bearing not only when the non-contact bearing is provided at the end of the shaft member 320 but also when the contact bearing is provided. This brings about an advantage in terms of maintaining durability of the contact bearing.

6 is a front view showing the electromagnet member 210 in the electromagnetic sealing apparatus 1 of the present invention, referring to this, the electromagnet member 210 of the electromagnetic sealing apparatus 1 according to an embodiment of the present invention is The nose is provided around the core portion 211 and the core portion 211 provided in a shape protruding from the inner wall portion 120 of the body unit 100, the nose is connected to the current applying member 220 It includes a portion 212, the core portion 211, the opposite end portion opposite to the coupling end portion 211a than the coupling end portion 211a coupled to the inner wall portion 120 of the body unit 100 It may be characterized in that the width of the (211b) is formed large.

In other words, the electromagnet member 210 may be specifically composed of the core portion 211 and the coil portion 212, and by providing the shape in a specific shape, it is possible to increase the efficiency of the sealing action by the formation of electromagnetic force will be.

That is, by reducing the leakage magnetic flux and by increasing the magnetic force cross-sectional area, the sealing efficiency by the electromagnetic force formed by the electromagnet member 210 is increased.

As such, the coupling end portion 211a, which is an area close to the body unit 100, has a small cross-sectional area, and on the contrary, the facing end portion 211b adjacent to the shaft member 320 or the magnetic fluid L has a cross-sectional area. By forming relatively large, it is possible to improve the sealing efficiency by concentrating the magnetic flux in the direction of the facing end 211b while preventing the leakage of magnetic flux.

For example, the width of the facing end 211b with respect to the width W of the coupling end 211a may be presented in a form of 1.5 to 2.0 times.

On the other hand, the plurality of the core portion 211 is composed of an aggregate may have a cylindrical shape. 7 may be an example, and FIG. 7 is a cut perspective view illustrating a half cut in a cylindrical shape.

In other words, the assembly of the core portion 211 is a form in which the shaft member 320 of the roll shaft unit 300 of the cylindrical shape is inserted so as to face the roll shaft unit 300 while forming a predetermined gap (G). It can be provided in a cylindrical shape.

In this case, at least two core parts 211 should be provided in the form of a cylinder, and thus, any one part of one or more divided cylinders of a bidivision cylinder may be the core part 211.

This is because the core part 211 is part of the divided cylinder because the coil part 212 is to be wound and provided, and it is provided at regular intervals in the circumferential direction of the shaft member 320.

In addition, in order to further reduce the leakage magnetic flux, both sides of the facing end 211b may be formed in a concave round shape.

That is, the facing end portion 211b of the electromagnetic sealing apparatus 1 according to the embodiment of the present invention has both sides concavely rounded so that the width w becomes smaller toward the coupling end portion 211a. It can be characterized.

Furthermore, in the electromagnetic sealing apparatus 1 according to the embodiment of the present invention, the rounded radius of curvature R of the facing end 211b is formed to be smaller than at least half of the width w of the coupling end 211a. It may be characterized by.

As such, by specifying the radius of curvature R rounded of the facing end 211b, leakage of magnetic flux formed in the electromagnet member 210 can be further prevented.

In addition, the electromagnet member 210 of the electromagnetic sealing apparatus 1 according to an embodiment of the present invention may be characterized by forming a gap G with the roll shaft unit 300 to 0.2 to 10 mm. .

This correlates with the power input for sealing the magnetic fluid L by the electromagnet unit 200.

In other words, when the gap G is widened, the force acting on the magnetic fluid L is increased by the hydrostatic pressure acting on the magnetic fluid L, and thus the power input to the electromagnet member 210 is greatly consumed. On the other hand, when the gap G is narrowed, the force acting on the magnetic fluid L is reduced by the hydrostatic pressure acting on the magnetic fluid L, and thus the power input to the electromagnet member 210 is consumed small. Considering the relationship.

Here, when the distance between the electromagnet member 210 and the shaft member 320 of the roll shaft unit 300 is increased, the force required to push the magnetic fluid L toward the opening tool 110 becomes larger. The upper limit of the gap G is limited to 10 mm, and if the gap G between the electromagnet member 210 and the shaft member 320 is too close, the gap between the electromagnet member 210 and the shaft member 320 may be reduced. Since the collision can be caused, the lower limit of the gap G is limited to 0.2 mm.

FIG. 7 is a perspective view illustrating an electromagnet member 210 in the electromagnetic sealing apparatus 1 of the present invention, and FIG. 8 is an electromagnet member 210 in the electromagnetic sealing apparatus 1 according to the present invention. It is a front view which shows the Y connection with the electric current application member 220 to apply.

The current applying member 220 is coupled to the electromagnet member 210 in a Y connection, or can be applied to the AC current by the PWM driver.

Specifically, the coil unit 212 of the electromagnetic sealing apparatus 1 according to an embodiment of the present invention may be characterized in that Y-connected with the current applying member 220.

As such, when the current applying member 220 and the coil units 212 of the plurality of electromagnet members 210 are connected to each other by the Y connection, the polarities formed by the electromagnet members 210 are distinguished and operated in three. .

In other words, at one point, one electromagnet member 210 forms an N pole, another electromagnet member 210 forms a neutral pole, and the other electromagnet member 210 forms an S pole. In addition, the above-described action of pushing the magnetic fluid L in the direction of the opening tool 110 can be performed in the same way.

When the Y connection is performed, the phases of the alternating current provided to the coupled electromagnet member 210 are supplied at a difference of 120 degrees, respectively, and the polarity or intensity of the magnetic force is divided into three.

This will be described again in terms of the induction of movement of the magnetic fluid (L), the first of the three electromagnet members 210 shown in Figure 8 as the U-pole electromagnet (210a), the second to the V-pole electromagnet (210b) If the third is called the W-pole electromagnet 210c, when an alternating current is applied with a 120 degree phase difference starting from the U-pole electromagnet 210a, each electromagnet forms a magnetic force accordingly.

However, when one electromagnet forms the N pole, another electromagnet forms the S pole, and the other electromagnet forms an opposite polarity of the magnetic force due to the difference in magnetic forces of the electromagnets.

In addition, the current applying member 220 of the electromagnetic sealing device 1 according to an embodiment of the present invention, characterized in that for applying an alternating current to the electromagnet member 210 by a pulse width modulation (PWM) driver. can do.

As described above, when the AC current is applied to the current applying member 220 by the PWM driver, the electromagnet member 210 receives an instantaneous current, thereby preventing the problem of heat generation.

In other words, when an alternating current is applied to the coil unit 212 of the electromagnet member 210 by a PWM driver, it is applied as a dot. Thus, the same effect as that in which the current is not applied to the coil unit 212 is generated and heat is generated. It does not, but the magnetic force can be formed.

Claims

A body unit provided in a port in which a magnetic fluid in which magnetic is formed is contained; And

It is provided on the inner wall portion of the body unit in which the sealing space is formed so as to seal the sealing space of the body unit communicated through the port and the opening tool, by applying the attraction force and repulsive force to the magnetic fluid alternately the opening tool At least one electromagnet unit configured to move the magnetic fluid in a direction;

Electromagnetic sealing apparatus comprising a.
The method of claim 1,

The electromagnet unit,

An electromagnet member having alternating polarities by means of a time-varying magnetic field formed by applying an alternating current, the plurality of electromagnet members being provided in the sealing space in parallel to the inner wall of the body unit; And

A current application member for applying an alternating current to the electromagnet member;

Electromagnetic sealing device comprising a.
The method of claim 2,

The current applying member, the electromagnetic sealing device, characterized in that for applying the alternating current so that the neighboring electromagnet member to form a different polarity.
The method of claim 3,

The electromagnet member,

A core part provided in a shape protruding from an inner wall part of the body unit; And

A coil part wound around the core part and connected to the current applying member;

Including;

The core portion, the electromagnetic sealing device, characterized in that the width of the opposite end portion opposite to the coupling end portion is formed larger than the coupling end coupled to the inner wall portion of the body unit.
The method of claim 4, wherein

The facing end is formed in a concave round both sides is formed in the electromagnetic sealing device, characterized in that the width is formed smaller toward the coupling end direction.
The method of claim 5,

The rounded radius of curvature of the facing end is formed at least less than half of the width of the coupling end electromagnetic sealing device.
The method of claim 4, wherein

And the coil part is Y-connected to the current applying member.
The method of claim 3,

And the current applying member applies an alternating current to the electromagnet member by a pulse width modulation (PWM) driver.
The method of claim 3,

The current applying member, the electromagnetic sealing device, characterized in that for applying a current to the force acting on the magnetic fluid is 40 ~ 250N.
The method of claim 1,

The body unit is an electromagnetic sealing device, characterized in that provided with a nonmagnetic material.
The method of claim 3,

A roll shaft unit inserted into the sealing space; And

A bearing unit provided inside the sealing space than the electromagnet unit, and the roll shaft unit is inserted and supported therein;

Electromagnetic sealing device further comprising.
The method of claim 11,

The bearing unit is an electromagnetic sealing device, characterized in that provided with a rolling bearing.
The method of claim 12,

The bearing unit,

An outer ring member coupled to the body unit;

An inner ring member inserted into the roll shaft unit and provided inside the outer ring member; And

A ball member provided between the outer ring member and the inner ring member;

Electromagnetic sealing device comprising a.
The method of claim 13,

The ball member is an electromagnetic sealing device, characterized in that provided with a zirconia-based material or a ceramic material.
The method of claim 11,

The roll shaft unit,

A roll member provided on a transport path of the steel sheet; And

A shaft member coupled in the axial direction of the roll member and inserted into the sealing space and provided as a nonmagnetic material;

Electromagnetic sealing device comprising a.
The method of claim 15,

The roll shaft unit,

A cap member fitted to an outer surface of the shaft member and provided as a diamagnetic material;

Electromagnetic sealing device further comprising.
The method of claim 16,

The current applying member, the electromagnetic sealing device characterized in that for applying an alternating current so that the electromagnet members facing each other around the shaft member to form the same polarity.
The method of claim 11,

The electromagnet member is electromagnetic sealing device, characterized in that the gap with the roll shaft unit to form a 0.2 ~ 10mm.
The method of claim 1,

A cooling unit for flowing a cooling fluid to a cooling tube provided in a body unit around the electromagnet unit;

Electromagnet sealing device comprising a.
Plating bath provided to the port containing the magnetic fluid which is molten zinc; And

The electromagnetic sealing device of any one of claims 1 to 19 provided in the plating bath;

Including;

Steel plate immersed in the molten zinc of the plating bath is characterized in that the plating is guided by a roll shaft unit provided in the body unit of the electromagnetic sealing device.
The method of claim 20,

The roll shaft unit is a plating equipment, characterized in that the sink roll, correcting roll or stabilizing roll.