JP5438372B2 - Induction heating roller device - Google Patents

Description

  The present invention relates to an induction heat roller device.

  For example, a roller whose surface temperature is controlled is used in a continuous heat treatment step of a sheet material such as a plastic film, paper, cloth, nonwoven fabric, synthetic fiber, and metal foil, a web material, a wire (thread) material, or the like. An induction heating roller device is used as a device for controlling or changing the surface temperature of the roller to a constant temperature.

  As shown in Patent Document 1, a conventional induction heating roller device has a magnetic flux generation mechanism including an iron core and an induction coil along the axis of a rotating roller body. An induced current is excited on the side peripheral wall of the main body, and the roller main body is heated by Joule heating by the current.

  However, in this induction heating roller device, only the heating of the roller body using the magnetic flux generating mechanism is performed, and when it is necessary to remove the processed material or cool the roller body, a mechanism for naturally cooling or circulating a cooling fluid is used. It is necessary to provide. In natural cooling, it naturally takes time to cool to a desired temperature. In addition, if the mechanism for circulating the cooling fluid is provided, piping is required, which not only complicates the structure of the roller body, but also may cause leakage of the cooling fluid.

  In addition, when the induction heating roller device is used at a high temperature or at a high watt density, the magnetic flux generation mechanism uses Joule heating (copper loss) caused by current flowing through the induction coil wires, iron core iron The problem is that the insulation performance of the induction coil decreases due to the temperature rise due to the loss, or the magnetic permeability of the iron core approaches 1 as the temperature of the iron core approaches the Curie point and the performance as the iron core decreases. There is. For this reason, the magnetic flux generation mechanism may need to be cooled. For this reason, conventionally, as shown in Patent Document 2, there is a configuration in which the cooling fluid is circulated in the induction coil. However, in such a configuration, not only the configuration of the induction coil becomes complicated, but also the cooling fluid There is a problem that there is a risk of leakage.

JP 2002-319477 A JP 2002-43050 A

  Therefore, the present invention has been made to solve the above-mentioned problems all at once, and can provide a heat removal operation of the processed material without providing a mechanism for circulating the cooling fluid, and can reduce the surface temperature of the roller body to the low temperature side. The main objective is to reduce the time required to change the setting, or to cool the iron core or induction coil that constitutes the magnetic flux generation mechanism, and to recover the excess heat in the cooling process as electrical energy and to save energy It is what.

That is, the induction heating roller device according to the present invention includes a hollow roller body, an iron core disposed in the hollow direction of the roller body along the axial direction of the roller body, and an induction coil wound around the iron core. And a thermoelectric conversion element provided so that the heat absorption surface of the roller body or the magnetic flux generation mechanism is in contact with the roller body , the Peltier element having the heat absorption surface, and the Peltier element And a Seebeck element provided so as to be in contact with the heat radiation surface .

  In such a case, the induction heating roller device is provided with a thermoelectric conversion element, and the heat absorption surface of the thermoelectric conversion element is provided in contact with the roller body or the magnetic flux generation mechanism. Alternatively, the roller body or the magnetic flux generation mechanism can be cooled by removing the heat from the magnetic flux generation mechanism. In particular, when the thermoelectric conversion element is provided in the roller body, the time required for changing the setting of the surface temperature of the roller body to the low temperature side can be shortened without providing a mechanism for circulating the cooling fluid in the roller body. In addition, the heat removal operation of the processed material can be performed. On the other hand, when the thermoelectric conversion element is provided in the magnetic flux generation mechanism, the heat can be cooled by the copper loss generated in the induction coil or the iron loss generated in the iron core, and the insulation performance of the induction coil is reduced or the iron core functions. The decrease can be suppressed. In addition, since the roller body or the magnetic flux generation mechanism is cooled using a thermoelectric conversion element, surplus heat in the cooling process can be recovered as electric energy, and energy saving in the induction heating roller device can be achieved. be able to.

  In order to arrange the thermoelectric conversion element and cool the roller body without significantly changing the configuration of the conventional induction heating roller device, the thermoelectric conversion element is in contact with the inner surface of the roller body. It is conceivable that it is provided as follows.

  In order to arrange the thermoelectric conversion element and cool the magnetic flux generation mechanism without significantly changing the configuration of the conventional induction heating roller device, the thermoelectric conversion element is brought into contact with the outer surface of the induction coil. It is desirable to be provided as follows. Here, providing the adsorption surface of the thermoelectric conversion element in contact with the outer surface of the induction coil means providing an insulating material between the outer surface of the induction coil and the adsorption surface of the thermoelectric conversion element in addition to providing direct contact. Including interposing.

  In order to arrange the thermoelectric conversion element and cool the iron core of the magnetic flux generating mechanism without significantly changing the configuration of the conventional induction heating roller device, the thermoelectric conversion element has an endothermic surface on the inner surface of the iron core. It is desirable to be provided so that it may contact.

  According to the present invention configured as described above, it is possible to perform the heat removal operation of the processed material without providing a mechanism for circulating the cooling fluid, it is possible to reduce the time required for the setting change of the surface temperature of the roller body to the low temperature side, or It is possible to cool the iron core or induction coil that constitutes the magnetic flux generation mechanism, and to recover the surplus heat in the cooling process as electric energy and to save energy. Moreover, the design which makes the current density of an induction coil or the magnetic flux density of an iron core large becomes possible, and the use material can be reduced.

It is sectional drawing of the induction heating roller apparatus which concerns on one Embodiment of this invention. It is a partial expanded sectional view of the thermoelectric conversion module in the embodiment. It is a partial expanded sectional view which shows the electric power transmission mechanism in the embodiment. It is sectional drawing of the induction heating roller apparatus which concerns on deformation | transformation embodiment.

  Hereinafter, an embodiment of an induction heat roller device according to the present invention will be described with reference to the drawings.

  The induction heating roller device 100 according to the present embodiment is used in a continuous heat treatment process of a sheet material such as a plastic film, paper, cloth, nonwoven fabric, synthetic fiber, and metal foil, a web material, a wire (thread) material, and the like. As shown in FIG. 1, a hollow cylindrical roller body 2 provided rotatably and a magnetic flux generation mechanism 3 accommodated in the roller body 2 are provided.

  Journals 41 are attached to both ends of the roller body 2. The journal 41 is formed integrally with a hollow drive shaft 42, and the drive shaft 42 is rotatably supported on a base 52 via a bearing 51 such as a rolling bearing. The roller body 2 is configured to be rotated by a driving force applied from the outside, for example, by a motor or the like.

  In addition, a plurality of jacket chambers 21A for enclosing a gas-liquid two-phase heat medium extending in the longitudinal direction (axial direction) are formed in the circumferential direction on the side peripheral wall 21 of the roller body 2, and end portions in the respective jacket chambers 21A are formed. Is in communication with the annular hole. The surface temperature of the roller body 2 is made uniform by the latent heat transfer of the gas-liquid two-phase heat medium sealed in the jacket chamber 21A.

  Further, the roller body 2 is provided with a temperature sensor T1 made of, for example, a thermocouple for detecting the temperature of the roller body 2. In the present embodiment, the roller body 2 is provided with a temperature sensor T1 by forming a pore between the jacket chamber 21A and the outer peripheral surface of the roller body 2 and inserting a temperature sensor into the pore. Reference numeral L1 denotes a lead wire for taking out a signal from the temperature sensor to the outside.

  The magnetic flux generation mechanism 3 includes a cylindrical iron core 31 having a cylindrical shape, and an induction coil 32 wound around the outer peripheral surface of the cylindrical iron core 31. Support rods 6 are attached to both ends of the cylindrical iron core 31, respectively. Each of the support rods 6 is inserted into the drive shaft 42 and is rotatably supported with respect to the drive shaft 42 via a bearing 7 such as a rolling bearing. Thereby, the magnetic flux generation mechanism 3 is supported in a suspended state inside the roller body 2. A lead wire L2 is connected to the induction coil 32, and an AC power supply (not shown) for applying an AC voltage is connected to the lead wire L2.

  By such a magnetic flux generation mechanism 3, an alternating magnetic flux is generated when an AC voltage is applied to the induction coil 32, and the alternating magnetic flux passes through the side peripheral wall 21 of the roller body 2. This passage generates an induced current in the roller body 2, and the roller body 2 generates Joule heat by the induced current.

  Thus, the induction heating roller device 100 of the present embodiment is provided with a plurality of thermoelectric conversion modules 8 composed of a plurality of thermoelectric conversion elements.

  The thermoelectric conversion module 8 is a device (device) that converts thermal energy into electrical energy or electrical energy into thermal energy. As shown in FIG. It is provided so as to contact the peripheral surface.

  Specifically, as shown in FIG. 2, the thermoelectric conversion module 8 includes a Peltier element 81 provided with its heat absorbing surface 81 a in contact with the inner peripheral surface of the roller body 2 to be cooled, and heat dissipation of the Peltier element 81. The heating surface 82a is provided in contact with the surface 81b, and the cooling surface 82b includes a Seebeck element 82 provided in the hollow of the roller body 2.

  The Peltier element 81 and the Seebeck element 82 use thermoelectric conversion members 8a and 8b, which are two types of semiconductors, a p-type semiconductor and an n-type semiconductor, and the two types of thermoelectric conversion members 8a and 8b are formed of an electrode member 8c. Are alternately and electrically connected in series. When the current flows through the thermoelectric conversion members 8a and 8b, the Peltier element 81 generates heat at one end side of the thermoelectric conversion members 8a and 8b and generates heat at the other end side (Peltier effect). On the other hand, the Seebeck element 82 generates thermoelectromotive force according to the temperature difference when one of the thermoelectric conversion members 8a and 8b is set to a relatively high temperature and the other is set to a relatively low temperature (Seebeck effect). ). In the present embodiment, the heating surface 82a of the Seebeck element 82 is provided so as to be in contact with the heat radiating surface 81b of the Peltier element 81. Therefore, heat energy generated by the Peltier element 81 can be efficiently converted into electric energy to generate electric power. .

  Next, the power transmission mechanism 9 of the induction heating roller device 100 will be described with reference to FIG.

  The power transmission mechanism 9 is configured using a rotary transformer, and includes a power supply / demand section 91 of the thermoelectric conversion module 8 and a power supply / demand section 92 of the temperature sensor T1.

  The electric power supply and demand unit 91 of the thermoelectric conversion module 8 includes a rotor coil 91 a that constitutes a rotary transformer supported on the inner surface of the first support frame 10 fixed to one end of the drive shaft 42, and one of the support rods 6. And a stator coil 91b constituting a rotary transformer supported so as to face the rotor coil 91a on the outer surface of the second support frame 11 fixed to the end of the second support frame 11. Further, an AC-DC converter 91c is provided between the lead wire L3 extending from the thermoelectric conversion module 8 and the rotor coil 91a.

  In addition, the code | symbol 91d in FIG. 3 is a stator coil for the electric power supply to the AC-DC conversion part 91c, and the code | symbol 91e is a rotor coil for the electric power supply to the AC-DC conversion part 91c. Note that the stator coil 91d for supplying power to the AC-DC converter 91c is connected to the receptacle via the converter 91f, and is connected to the outside by the external lead wire L4 via the plug P1 coupled to the receptacle. Electrically connected.

  The power supply and demand unit 92 of the temperature sensor T1 is arranged so that the rotor coil 92a constituting the rotary transformer supported on the inner surface of the first support frame 10 and the outer surface of the second support frame 11 face the rotor coil 92a. And a stator coil 92b constituting a supported rotary transformer.

The first support frame 10 is provided with a signal converter 92c. The lead wire L1 extending from the temperature sensor T1 is connected to the signal converter 92c, and a voltage corresponding to the temperature detected by the temperature sensor T1 is converted into a temperature signal and applied to the rotor coil 92a.
The stator coil 92b is connected to the receptacle through the converter 92d, and is electrically connected to the outside by an external lead wire L5 through a plug P2 coupled to the receptacle.

<Effect of this embodiment>
According to the induction heating roller device 100 according to the present embodiment configured as described above, the induction heating roller device 100 is provided with the thermoelectric conversion module 8, and the heat absorption surface 81a of the thermoelectric conversion module 8 is brought into contact with the roller body 2. Since the thermoelectric conversion module 8 takes the heat of the roller body 2, the roller body 2 and the processed product can be cooled. Therefore, it is not necessary to provide a mechanism for circulating the cooling fluid in the roller body 2, eliminating the need for piping and cooling fluid, and reducing the time required for changing the setting of the surface temperature of the roller body 2 to the low temperature side. In addition, it is possible to perform the heat removal operation of the processed material. In addition, since the roller body 2 is cooled by using the thermoelectric conversion module 8, surplus heat in the cooling process can be recovered as electric energy, and energy saving in the induction heating roller device 100 can be realized. it can.

<Other modified embodiments>
The present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the thermoelectric conversion module is provided on the inner peripheral surface of the roller body. However, the thermoelectric conversion module may be provided on the magnetic flux generation mechanism. At this time, for example, as shown in FIG. 4, it may be provided between the induction coil 32 and the iron core 31, or may be provided on the outer surface of the induction coil 32. In addition, when providing in the outer surface of the induction coil 32, it is possible to provide the heat absorption surface 81a of the thermoelectric conversion module 8 so that it may contact with the outer surface of the induction coil 32 through an insulating material. Further, the thermoelectric conversion module 8 may be provided on the inner surface of the iron core 31. Moreover, you may make it provide a thermoelectric conversion module in both a roller main body and a magnetic flux generation mechanism.

  Moreover, although the electric power supply mechanism of the said embodiment, especially the electric power supply-and-demand part of the thermoelectric conversion module were comprised using the rotation transformer, you may comprise using a slip ring other than that.

  Furthermore, in the above-described embodiment, the double-sided induction heating roller device has been described. However, the invention can also be applied to a cantilever type induction heating roller device.

  In addition, it can be applied to a heat treatment roller device. The heat treatment roller device includes a hollow cylindrical heat treatment roller for heat treating a workpiece that contacts the surface, and a rotation drive unit that rotates the heat treatment roller, and a thermoelectric conversion module is provided on an inner peripheral surface of the treatment roller. It is constituted by.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Induction heating roller apparatus 2 ... Roller main body 3 ... Magnetic flux generation mechanism 31 ... Iron core 32 ... Induction coil 8 ... Thermoelectric conversion module 81 ... Peltier element (thermoelectric conversion element)
81a ... heat absorbing surface 81b ... heat radiating surface 82 ... Seebeck element (thermoelectric conversion element)
82a ... heating surface 82b ... cooling surface

Claims (4)

A hollow roller body;
A magnetic flux generating mechanism comprising an iron core disposed in the hollow direction of the roller body along the axial direction of the roller body and an induction coil wound around the iron core;
A thermoelectric conversion element provided so that its heat absorption surface is in contact with the roller body or the magnetic flux generation mechanism ,
The induction heating roller device , wherein the thermoelectric conversion element includes a Peltier element having the heat absorption surface and a Seebeck element provided so as to be in contact with a heat dissipation surface of the Peltier element .   The induction heating roller device according to claim 1, wherein the thermoelectric conversion element is provided such that its heat absorption surface is in contact with an inner surface of the roller body.   The induction heating roller device according to claim 1, wherein the thermoelectric conversion element is provided such that the heat absorption surface thereof is in contact with the outer surface of the induction coil. The induction heating roller device according to claim 1, wherein the thermoelectric conversion element is provided such that its heat absorption surface is in contact with an inner surface of the iron core.