CN219145656U

CN219145656U - Induction heating roller device

Info

Publication number: CN219145656U
Application number: CN202222676821.XU
Authority: CN
Inventors: 大空健太郎; 冈本幸三; 北野孝次
Original assignee: Tokuden Co Ltd Kyoto
Current assignee: Tokuden Co Ltd Kyoto
Priority date: 2021-10-15
Filing date: 2022-10-11
Publication date: 2023-06-06
Anticipated expiration: 2032-10-11
Also published as: EP4167686A1; EP4167686B1

Abstract

The present utility model provides a cantilever type induction heating roller device, which not only can make the rotation of a roller main body high, but also can miniaturize the cantilever type induction heating roller device, and can obtain the torque and the capacity of a motor required by the cantilever type induction heating roller device, the cantilever type induction heating roller device comprises: the cantilever is supported on a fixed shaft of the base; a cylindrical roller body rotatably supported by the fixed shaft via a bearing; the induction heating mechanism is arranged in the roller main body and is used for inducing and heating the roller main body; and an axial gap motor disposed between the stand and the roller body to rotate the roller body relative to the fixed shaft.

Description

Induction heating roller device

Technical Field

The present utility model relates to an induction heat roller device.

Background

In a process for producing synthetic fibers such as nylon and polyester, a straight drawing process is performed, and after spinning, the fibers are heated and elongated in the longitudinal direction to adjust the molecular orientation, thereby improving the properties such as tensile strength and elastic modulus.

In the drawing step, the synthetic fibers are heated by using a plurality of cantilevered induction heating roller devices, and the synthetic fibers are stretched by a difference in rotational speed between the induction heating roller devices.

As disclosed in patent document 1, the cantilever type induction heating roller device includes a roller body having a shaft fitting portion at a bottom center portion, and a magnetic flux generating mechanism including a cylindrical core and an induction coil disposed inside the roller body.

Specifically, in the induction heating roller device described above, a cylindrical portion for supporting the magnetic flux generating mechanism is provided inside the roller body, and the rotating shaft of the motor is supported by the rolling bearing on the inner peripheral surface of the cylindrical portion.

However, in the structure in which the rotating shaft of the motor is supported by the rolling bearing, the roller main body cannot be rotated at a higher speed at which the rotating shaft is at a dangerous speed corresponding to a resonance frequency determined by the mass of the member constituting the rotating system and the rigidity determined by the material thereof.

As a countermeasure for this, the rigidity of the rotary shaft can be increased to increase the dangerous speed by increasing the size of the rolling bearing to increase the outer diameter of the rotary shaft, whereas the larger the size of the rolling bearing is, the lower the allowable maximum rotation speed of the bearing itself is. As a result of the rigidity of the rotating shaft opposing the size of the rolling bearing, there is a problem that the dangerous speed is determined and the maximum rotational speed of the roller main body is determined.

As shown in patent document 2, the following structure can be considered: the motor stator is fitted and fixed on the inner diameter side of the hot roller rotor and the heating coil, and is provided with a motor rotor arranged opposite to the motor stator and a shaft fixed with the motor rotor. In addition, the shaft is connected to the heat roller rotor. Furthermore, the shaft is rotatably supported by a bearing on a housing which is connected to a thermo roll bushing provided with a heating coil.

According to the above configuration, although the area required for installing the induction heating roller device can be reduced in size, it is difficult to change the configuration limited by the dangerous speed of the shaft, and since the arrangement of the motor stator and the motor rotor is limited by the inner diameter of the heating coil, it is difficult to obtain a motor capable of exhibiting the required rotational torque and capacity. In this way, if the outer diameter of the heat roller rotor is increased in order to expand the inner diameter of the heating coil, as a result, the weight and the moment of inertia of the heat roller rotor are increased, which results in a contradiction that a larger motor is required.

Prior art literature

Patent document 1: japanese patent laid-open publication No. 2009-163968

Patent document 2: japanese patent laid-open publication No. Hei 6-111920

Disclosure of Invention

The present utility model has been made to solve the above problems, and its main object is to not only increase the rotational speed of a roller main body as high as possible, but also miniaturize a cantilever-type induction heating roller device and to obtain torque and capacity of a motor required for the cantilever-type induction heating roller device.

Namely, the induction heating roller device of the present utility model is characterized by comprising: the cantilever is supported on a fixed shaft of the base; a cylindrical roller body rotatably supported by the fixed shaft via a bearing; the induction heating mechanism is arranged in the roller main body and is used for inducing heating of the roller main body; and an axial gap motor provided between the housing and the roller body to rotate the roller body with respect to the fixed shaft.

According to this configuration, since the rotation shaft is not used, the rotation of the roller body is easily increased without being restricted by a dangerous speed. Further, since the axial gap motor is used, the cantilever type induction heating roller device can be miniaturized as compared with the conventional radial gap motor, and the space required for installation can be greatly reduced, thereby realizing space saving. Further, the rotor and the stator of the axial gap motor can be increased to a size equivalent to the outer diameter of the roller body, and the torque and the capacity of the motor required for the cantilever type induction heating roller device can be obtained. Further, since the axial gap motor is provided outside the roller main body, the axial dimension of the induction heating mechanism provided inside the roller main body can be made as large as possible.

As a specific embodiment of the axial gap motor, it is considered that the axial gap motor includes: a disc-shaped rotor provided on a housing-side end surface of the roller body facing the housing, the rotor having a plurality of permanent magnets arranged around a rotation axis of the roller body; and a disk-shaped stator provided in the housing or the fixed shaft so as to face the housing-side end surface, the disk-shaped stator having a plurality of magnetic poles facing the rotor in the rotation axis direction of the roller main body.

In order to prevent the bearing from being damaged by cooling the bearing, a refrigerant flow passage through which a refrigerant flows is preferably formed in the stationary shaft.

In order to cool the stator in addition to the bearing, it is preferable that the refrigerant flow passage is used to cool the bearing and cool the stator.

As a specific embodiment of the fixed shaft, it is preferable that the fixed shaft includes: a support shaft portion that supports the roller main body; and a fixing flange portion formed at a base end portion of the support shaft portion and fixed to the housing, the stator being provided at the fixing flange portion.

As a specific embodiment for cooling the bearing and the stator, it is preferable that a bearing cooling flow passage for cooling the bearing is formed in the support shaft portion, and a stator cooling flow passage for cooling the stator is formed in the fixing flange portion.

In order to cool the axial gap motor while lubricating and cooling the bearing, it is preferable that the refrigerant flow passage is configured to flow a refrigerant containing lubricating oil, the refrigerant flow passage is opened at an outer peripheral surface of the fixed shaft, and a mist-like refrigerant is supplied to the bearing and the axial gap motor.

In order to prevent overheating of the rotor by reducing heat transfer from the inductively heated roller body to the rotor, a heat insulating layer is preferably formed between the machine base side end surface of the roller body and the rotor.

In a specific embodiment for forming the heat insulating layer, the rotor is preferably fixed to the base-side end surface by an annular fixing member, and the heat insulating layer is preferably formed by the fixing member. In this way, the structure of the device for heat insulation can be simply constructed by forming the heat insulating layer by the fixing member.

Preferably, the fixing member has a groove formed therein and opened at the entire outer peripheral surface, and the heat insulating layer is formed by the groove. According to the above configuration, the back surface side of the rotor can be positively air-cooled.

Preferably, a refrigerant flow passage through which a refrigerant flows is formed in the fixed shaft, the refrigerant flow passage being open to an outer peripheral surface of the fixed shaft, the refrigerant being supplied to the axial gap motor, and an inner flow passage through which the refrigerant flows from a radially inner side to a radially outer side being formed in the fixed member. According to the above configuration, since the fixing member is provided with the internal flow passage through which the refrigerant flows, the heat insulating performance of the fixing member can be improved, and the rotor can be actively cooled.

Preferably, a refrigerant flow passage through which a refrigerant flows is formed in the fixed shaft, the refrigerant flow passage being open to an outer peripheral surface of the fixed shaft, the refrigerant being supplied to the axial gap motor, and a flow passage through which the refrigerant flows from a radially inner side to a radially outer side being formed in the rotor between the permanent magnets adjacent to each other. According to the above configuration, since the flow path through which the refrigerant flows is formed between the permanent magnets adjacent to each other in the rotor, the permanent magnets of the rotor can be actively cooled.

According to the present utility model having the above-described structure, the induction heating roller device can be miniaturized while the rotation of the roller main body is speeded up, and the torque and capacity of the motor required for the induction heating roller device can be obtained.

Drawings

Fig. 1 is a schematic cross-sectional view of a cantilever type induction heat roller device according to an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of a cantilever type induction heat roller device according to a modified embodiment.

Fig. 3 is a schematic cross-sectional view of a cantilever type induction heat roller device according to a modified embodiment.

Fig. 4 is a schematic cross-sectional view of a cantilever type induction heat roller device according to a modified embodiment.

Fig. 5a1 is a cross-sectional view along the axial direction of structural example 1 of the fixing member, fig. 5a2 is a cross-sectional view perpendicular to the axial direction of structural example 1 of the fixing member, fig. 5b1 is a cross-sectional view along the axial direction of structural example 2 of the fixing member, and fig. 5b2 is a cross-sectional view perpendicular to the axial direction of structural example 2 of the fixing member.

Fig. 6 is a schematic cross-sectional view of a cantilever type induction heat roller device according to a modified embodiment.

Fig. 7a is a partial cross-sectional view schematically showing the structure of a cantilever-type induction heat roller device according to a modified embodiment, fig. 7b is a perspective view of a rotor, and fig. 7c is a schematic view showing the flow of a refrigerant.

Description of the reference numerals

100 cantilever type induction heating roller device

20 machine base

2 fixed axle

21 support shaft portion

22 fixing flange portion

3. 4 bearing

5 roller main body

5a side end face of the stand

6-induction heating mechanism

7 axial gap motor

71 rotor

72 stator

11 fixing member

11a groove

S1 heat insulation layer

121 refrigerant flow passage

121a runner for bearing cooling

121b flow passage for stator cooling

11R internal flow channel

71R runner

Detailed Description

(one embodiment of the utility model)

An embodiment of the cantilever type induction heat roller device 100 according to the present utility model is described below with reference to the drawings.

The cantilever type induction heating roller device 100 is used for a heat treatment process of a sheet material such as a plastic film, paper, cloth, nonwoven fabric, synthetic fiber, metal foil, or a continuous material such as a woven material, a wire (filament) material, or the like.

As shown in fig. 1, the cantilever type induction heat roller device 100 of the present embodiment includes: a fixed shaft 2 cantilever-supported by the housing 20; a roller body 5 supported rotatably by the fixed shaft 2 via a bearing 3 and a bearing 4; an induction heating mechanism 6 provided inside the roller body 5 and configured to induce heat generation in the roller body 5; and an axial gap motor 7 provided between the housing 20 and the roller body 5 to rotate the roller body 5 with respect to the fixed shaft 2.

(fixed shaft 2)

The fixed shaft 2 is cantilever-supported by being fixed at one end to a fixed housing 20. The fixed shaft 2 includes: a substantially cylindrical support shaft portion 21 rotatably supporting the roller body 5 via the bearing 3 and the bearing 4; and a fixing flange 22 formed at the base end of the support shaft 21 and fixed to the housing 20.

The

bearings

3 and 4 are rolling bearings, and may be made of a material such as chromium bearing steel, stainless steel, or ceramic, in accordance with the temperature of the bearing portion, or a lubricant thereof may be made of a material such as heat-resistant grease, heat-resistant oil, or solid lubricant in accordance with the temperature of the bearing portion. Besides the rolling bearing, a non-contact magnetic bearing may be substituted.

(roller body 5)

The roller body 5 includes: a cylindrical portion 51 having a cylindrical shape; a first disk portion 52 provided so as to close an opening at one axial end of the cylindrical portion 51; and a second circular plate portion 53 provided so as to close the opening at the other end in the axial direction of the cylindrical portion 51. In addition, a plurality of jacket chambers 5x are formed in the thickness of the cylindrical portion 51 in the axial direction. The jacket chamber 5x encloses a gas-liquid two-phase heat medium.

The first disk portion 52 and the second disk portion 53 of the roller body 5 are formed with

insertion holes

52h, 53h for inserting the fixed shaft 2. The outer ring rotating bearing 3 is provided between the insertion hole 52h of the first disk portion 52 and the fixed shaft 2, and the outer ring rotating bearing 4 is provided between the insertion hole 53h of the second disk portion 53 and the fixed shaft 2. One of the first disk portion 52 and the second disk portion 53 may be integrally formed with the cylindrical portion 51.

Further, a temperature sensor 8 for detecting the temperature of the cylindrical portion 51 is provided in the wall thickness of the cylindrical portion 51 of the roller body 5. The temperature sensor 8 is connected to a detection signal transmission unit 9 provided in the roller body 5, and a detection signal of the temperature sensor 8 is transmitted to an external temperature control device (not shown) through the detection signal transmission unit 9.

The temperature control device controls a power supply circuit (not shown) to be described later, thereby controlling the temperature of the roller body 5. The detection signal transmission unit 9 may be, for example, an electromagnetic induction type or an optical type having a transmission unit 9a and a reception unit 9b, and may be, for example, a short-range wireless communication system. In the detection signal transmitting section 9 of fig. 1, a transmitting section 9a is provided in the first disk section 52, and a receiving section 9b is provided on the cylindrical core 61 side.

(Induction heating mechanism 6)

The induction heating mechanism 6 includes: a cylindrical iron core 61 provided in the roller body 5 and having a cylindrical shape; and an induction coil 62 wound around the outer peripheral surface of the cylindrical core 61. The fixed shaft 2 is inserted into the cylindrical core 61 of the induction heating mechanism 6, and the induction heating mechanism 6 is mounted and fixed to the fixed shaft 2 by the mounting member 10.

A power supply circuit (not shown) for applying an ac voltage of a commercial frequency (50 Hz or 60 Hz) or the like is connected to a lead (not shown) connected to the induction coil 62.

With the induction heating means 6, when an ac voltage is applied to the induction coil 62, an alternating magnetic flux is generated, and the alternating magnetic flux passes through the side peripheral wall (cylindrical portion 51) of the roller body 5. An induced current is generated in the cylindrical portion 51 of the roller body 5 by the passage, and the cylindrical portion 51 of the roller body 5 joule heats up due to the induced current.

(axial gap Motor 7)

The axial gap motor 7 rotates the roller body 5 with respect to the fixed shaft 2, and is provided on the housing 20 side outside the roller body 5.

The specific axial gap motor 7 has a disk-shaped rotor 71 fixed to the roller body 5, and a disk-shaped stator 72 fixed to the fixing flange portion 22 of the fixing shaft 2.

The rotor 71 has a plurality of permanent magnets arranged at equal intervals around the rotation axis of the roller body 5. The rotor 71 of the present embodiment is fixed to the housing-side end surface 5a in the rotation axis direction of the roller body 5. The base side end surface 5a of the present embodiment is constituted by an outer end surface of the second disk portion 53 of the roller body 5.

Here, the heat insulating layer S1 is formed entirely in the circumferential direction around the rotation axis between the machine base side end surface 5a of the roller main body 5 and the back surface (surface opposite to the machine base 20) of the rotor 71. The concrete rotor 71 is fixed to the housing-side end surface 5a by an annular fixing member 11, and the heat insulating layer S1 is formed by the fixing member 11. The specific fixing member 11 is formed with a groove 11a that opens on the entire outer peripheral surface. The groove 11a is formed inside a position of half of the rotor 71 in the radial direction of the fixing member 11. With this structure, the fixing member 11 has a substantially U-shaped cross section. Further, the heat insulating layer S1 is formed by the grooves 11a. The thick portion of the fixing member 11 also functions as a heat insulating layer.

The stator 72 has a plurality of magnetic poles facing the rotor 71 in the rotation axis direction of the roller body 5. The plurality of magnetic poles are also arranged at equal intervals around the rotation axis of the roller body 5, like the plurality of permanent magnets. The stator 72 of the present embodiment is provided on the facing surface 2a facing the base side end surface 5a of the roller body 5. The facing surface 2a is formed by a surface facing the base side end surface 5a in the fixing flange portion 22 of the fixing shaft 2.

In the axial gap motor 7, by supplying ac power to the stator 72, a rotational torque is generated between the rotor 71 and the stator 72, and the roller body 5 is rotated at a predetermined rotational speed.

(bearing 3, bearing 4 and Cooling mechanism 12 of axial gap Motor 7)

The cantilever-type induction heating roller device 100 of the present embodiment further includes a cooling mechanism 12 for cooling the bearing 3, the bearing 4, and the axial gap motor 7.

The cooling mechanism 12 includes a refrigerant flow path 121 through which a refrigerant flows, which is formed inside the fixed shaft 2, and a refrigerant supply source (not shown) such as a pump that supplies the refrigerant to the refrigerant flow path 121. As the refrigerant, for example, water, air, or the like can be used.

The refrigerant flow passage 121 is formed to cool the

bearings

3, 4 and cool the stator 72 of the axial gap motor 7. The specific refrigerant flow passage 121 has a bearing cooling flow passage 121a formed in the support shaft portion 21 and used for cooling the bearing 3 and the bearing 4, and a stator cooling flow passage 121b formed in the fixing flange portion 22 and used for cooling the stator 72.

The bearing cooling flow path 121a communicates with the inlet P1 and the outlet P2 provided at the base end portion of the fixed shaft 2, and is a reciprocating flow path formed in the axial direction inside the support shaft portion 21. The bearing cooling flow passage 121a extends to a position of the free end side bearing 3 or its vicinity in the axial direction of the support shaft portion 21.

The stator cooling flow passage 121b has an annular flow passage formed along the circumferential direction of the stator 72 at a portion facing the stator 72 in the fixing flange portion 22. The stator cooling flow path 121b of the present embodiment is formed so as to be branched from the bearing cooling flow path 121a and communicates with the inlet P1 and the outlet P2. The stator cooling flow path 121b may be formed independently of the bearing cooling flow path 121a in the stationary shaft 2.

(effects of the present embodiment)

The induction heating roller device 100 having such a structure does not use a rotating shaft, and therefore is free from the restriction of dangerous speed, and the rotation of the roller body 5 can be easily accelerated. Further, since the axial gap motor 7 is used, the cantilever-type induction heat roller device 100 can be miniaturized as compared with the conventional radial gap motor, and the area required for installation can be greatly reduced, thereby saving space. Further, the rotor 71 and the stator 72 of the axial gap motor 7 can be increased to a size equivalent to the outer diameter of the roller body 5, and the torque and the capacity of the motor required for the cantilever type induction heat roller device 100 can be obtained. Further, since the axial gap motor 7 is provided outside the roller body 5, the axial dimension of the induction heating mechanism 6 provided inside the roller body 5 can be made as large as possible.

Since the grooves 11a are formed in the fixing member 11 for fixing the rotor 71, and the heat insulating layer S1 is formed by the grooves 11a, heat transfer from the inductively heated roller main body 5 to the rotor 71 can be reduced, and thus the rotor 71 can be prevented from being overheated. In addition, the back surface side of the rotor 71 may be positively air-cooled.

(other embodiments)

The present utility model is not limited to the above embodiment, and may be the following.

For example, in addition to the structure in which the stator 72 of the axial gap motor 7 of the above embodiment is provided to the fixed flange portion 22 of the fixed shaft 2, as shown in fig. 2, the stator 72 may be provided to the housing 20 or a member (not shown) different from the fixed shaft 2 provided to the housing 20.

The cooling mechanism 12 may directly supply the refrigerant containing the lubricating oil to the bearing 3, the bearing 4, and the axial gap motor 7. In this case, as shown in fig. 3, it is conceivable that the refrigerant flow path 121 flows the refrigerant containing the lubricating oil, and opens on the outer peripheral surface of the fixed shaft 2 (the support shaft portion 21), and the mist-like refrigerant is led out from the opening 121 x. Here, by forming the opening 121x of the refrigerant flow path 121 into a nozzle shape, the atomized refrigerant can be guided out. The opening 121x is formed so as to face the

bearings

3 and 4. The mist-like refrigerant led out from the opening 121x of the refrigerant flow path 121 is sprayed to the

bearings

3 and 4. The mist-like refrigerant sprayed onto the bearing 4 on the housing side is cooled between the rotor 71 and the stator 72 of the axial gap motor 7, and then discharged to the outside.

As shown in fig. 4, a refrigerant flow path 121 through which a refrigerant flows may be formed in the fixed shaft 2, and the refrigerant flow path 121 may be opened on the outer peripheral surface of the fixed shaft 2 toward the base side of the bearing 4, so that the refrigerant (for example, air) may be supplied to the axial gap motor 7. Here, the fixing member 11 that fixes the rotor 71 to the roller body 5 serves as a heat insulating layer S1, and an inner flow passage 11R through which the refrigerant flows from the inside to the outside in the radial direction is formed in the fixing member 11. Further, the refrigerant flow passage 121 is open in the outer peripheral surface of the fixed shaft 2 radially opposite to the inner peripheral surface of the fixed member 11. With this structure, the refrigerant supplied from the refrigerant flow passage 121 cools the bearing 4 on the housing side, and then passes through the inner flow passage 11R at the supply pressure of the refrigerant and with the centrifugal force accompanying rotation. Thus, the rotor 71 is cooled. A part of the refrigerant passes between the rotor 71 and the stator 72, is cooled, and is discharged to the outside.

Here, fig. 5a1, 5a2, 5b1, and 5b2 show a structural example of the fixing member 11 having the internal flow passage 11R. As shown in fig. 5a1 and 5a2, in the structure example 1, the fixing member 11 is formed of 1 plate member having a circular ring shape, and an inner flow passage 11R is formed in the wall thickness of the plate member from the radial inner side to the radial outer side. The internal flow path 11R may be a straight flow path or a curved flow path. As shown in fig. 5b1 and 5b2, in the structure example 2, the fixing member 11 is constituted by 2

annular plate members

11a and 11b, a plurality of spacer members 11c are overlapped, and an internal flow path 11R is formed between the

plate members

11a and 11b by the plurality of spacer members 11 c. In this configuration, the rotor 71 is fixed to one plate member 11a, and the other plate member 11b is fixed to the roller body 5.

Further, as shown in fig. 6, the fixing member 11 that fixes the rotor 71 to the roller body 5 may have a groove 11a that opens at the entire periphery of the inner peripheral surface. The heat insulating layer S1 is formed by the grooves 11a. A refrigerant flow passage 121 through which refrigerant flows is formed in the fixed shaft 2, and the refrigerant flow passage 121 is opened on the outer peripheral surface of the fixed shaft 2 toward the base side of the bearing 4, so that refrigerant (for example, air) can be supplied to the axial gap motor 7. Here, one or more through holes 11h are formed in a bottom wall portion (outer peripheral wall portion) of the groove 11a of the fixing member 11. The groove 11a and the through hole 11h constitute an internal flow path 11R. Further, the refrigerant flow passage 121 is open in the outer peripheral surface of the fixed shaft 2 radially opposite to the groove 11a of the fixed member 11. With this structure, the refrigerant supplied from the refrigerant flow path 121 cools the bearing 4 on the housing side, and then flows into the groove 11a at the supply pressure of the refrigerant and at the centrifugal force accompanying rotation, and is discharged to the outside from the through hole 11h. Thus, the rotor 71 is cooled. A part of the refrigerant passes between the rotor 71 and the stator 72, is cooled, and is discharged to the outside.

As shown in fig. 7a, 7b, and 7c, a flow passage 71R through which the refrigerant flows from the inside to the outside in the radial direction may be formed between the permanent magnets 712 adjacent to each other in the rotor 71. Here, the rotor 71 includes a base member 711 made of a magnetic material having a circular ring shape, and permanent magnets 712 provided intermittently and alternately in NS on the base member 711. In addition, the base member 711 may have a function as the heat insulating layer S1. Further, a fixing member 11 may be provided between the base member 711 and the roller main body 5. A refrigerant flow passage 121 through which refrigerant flows is formed in the fixed shaft 2, and the refrigerant flow passage 121 is opened on the outer peripheral surface of the fixed shaft 2 toward the base side of the bearing 4, so that refrigerant (for example, air) can be supplied to the axial gap motor 7. Here, the refrigerant flow path 121 is open in the outer peripheral surface of the fixed shaft 2 radially opposite to the permanent magnet 712. With this structure, the refrigerant supplied from the refrigerant flow path 121 cools the bearing 4 on the housing side, and then passes through the flow path 71R between the permanent magnets 712 at the supply pressure of the refrigerant and the centrifugal force accompanying the rotation. Further, the refrigerant passes between the rotor 71 and the stator 72. Thus, the rotor 71 is cooled.

In each of the above embodiments, a magnetic shield portion may be provided between the axial gap motor 7 and the induction heating mechanism 6. In fig. 1 and 2, the second disk portion 53 or the fixing member 11 may have a magnetic shielding function, or a magnetic shielding member may be provided separately. According to the above configuration, the axial gap motor 7 and the induction heating mechanism 6 arranged in series can be prevented from interfering with each other magnetically. Further, as for the generation of leakage flux in the core, an involute core having a low magnetic resistance (a core in which magnetic steel plates having a substantially involute shape in cross section are laminated in a cylindrical shape) may be used.

When the straight drawing step is performed using a plurality of the induction heating roller devices, a rotation movable portion may be provided on the fixed shaft 2 so as to provide a tilt angle (nielsen angle) between the plurality of induction heating roller devices for stabilizing a predetermined yarn path.

The present utility model is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit thereof.

Claims

1. A cantilevered induction heat roller apparatus comprising:

the cantilever is supported on a fixed shaft of the base;

a cylindrical roller body rotatably supported by the fixed shaft via a bearing;

the induction heating mechanism is arranged in the roller main body and is used for inducing heating of the roller main body; and

and the axial gap motor is arranged between the stand and the roller main body and enables the roller main body to rotate relative to the fixed shaft.

2. The cantilever type induction heating roller device according to claim 1, wherein,

the axial gap motor includes:

a disc-shaped rotor provided on a housing-side end surface of the roller body facing the housing, the rotor having a plurality of permanent magnets arranged around a rotation axis of the roller body; and

and a disk-shaped stator provided in the housing or the fixed shaft so as to face the housing-side end surface, the disk-shaped stator having a plurality of magnetic poles facing the rotor in the rotation axis direction of the roller body.

3. The cantilever type induction heating roller device according to claim 2, wherein a refrigerant flow passage through which a refrigerant flows is formed inside the fixed shaft.

4. A cantilevered induction heating roller apparatus according to claim 3 wherein the refrigerant flow path is for cooling the bearing and cooling the stator.

5. The cantilever type induction heating roller device according to claim 2, wherein,

the fixed shaft includes:

a support shaft portion that supports the roller main body; and

a fixing flange part formed at the base end part of the support shaft part and fixed to the stand,

the stator is provided to the fixing flange portion.

6. The cantilevered induction heating roller apparatus of claim 5 wherein,

a bearing cooling flow passage for cooling the bearing is formed in the support shaft portion,

a stator cooling flow passage for cooling the stator is formed in the fixing flange portion.

7. The cantilever type induction heat roller apparatus according to claim 4, wherein the refrigerant flow path circulates a refrigerant containing a lubricant oil, the refrigerant flow path opens on an outer peripheral surface of the fixed shaft, and a mist-like refrigerant is supplied to the bearing and the axial gap motor.

8. The cantilever type induction heating roller device according to claim 2, wherein a heat insulating layer is formed between the machine base side end surface of the roller main body and the rotor.

9. The cantilevered induction heating roller apparatus of claim 8 wherein,

the rotor is fixed on the side end face of the stand through a circular fixing component,

the insulating layer is formed by the fixing member.

10. The cantilevered induction heating roller apparatus of claim 9 wherein,

the fixing member is formed with a groove opening at the entire periphery of the outer peripheral surface,

the heat insulating layer is formed by the grooves.

11. The cantilevered induction heating roller apparatus of claim 9 or 10, wherein,

a refrigerant flow passage for flowing a refrigerant is formed in the fixed shaft,

the refrigerant flow passage is opened on the outer peripheral surface of the fixed shaft, supplies the refrigerant to the axial gap motor,

an inner flow passage is formed in the fixing member, and the refrigerant flows from the inside to the outside in the radial direction.

12. The cantilevered induction heating roller apparatus of claim 9 or 10, wherein,

a flow passage for allowing the refrigerant to flow from the inside to the outside in the radial direction is formed between the permanent magnets adjacent to each other in the rotor.