Induction heating roller and spinning traction machine
阅读说明:本技术 感应加热辊以及纺丝牵引机 (Induction heating roller and spinning traction machine ) 是由 加贺田翔 于 2019-01-09 设计创作,主要内容包括:本发明提供感应加热辊以及纺丝牵引机,能够抑制在导电性的均热体中流动涡电流,使辊表面有效地升温。将由导热率比外筒部(33)的至少内周面高且具有导电性的材料形成的圆筒状的均热体(36)配置成与外筒部(33)的内周面接触。在外筒部(33)的周向上设置至少一个沿着与周向交叉的方向延伸的不连续区域(40),使均热体(36)在周向上不连续。(The invention provides an induction heating roller and a spinning traction machine, which can inhibit eddy current flowing in a conductive soaking body and effectively raise the temperature of the roller surface. A cylindrical heat-equalizing body (36) made of a material having higher thermal conductivity than at least the inner peripheral surface of the outer cylinder (33) and having electrical conductivity is disposed in contact with the inner peripheral surface of the outer cylinder (33). At least one discontinuous region (40) extending in a direction intersecting the circumferential direction is provided in the circumferential direction of the outer tube section (33), and the heat equalizing body (36) is discontinuous in the circumferential direction.)
1. An induction heating roller is characterized by comprising:
a coil;
a cylindrical heated portion arranged radially outside the coil and inductively heated by the coil; and
a heat equalizing body made of a material having a higher thermal conductivity than at least an inner peripheral surface of the heated portion and having electrical conductivity, extending in an axial direction of the heated portion, and arranged in contact with an inner peripheral surface of the heated portion,
the heat equalizer is discontinuous in the circumferential direction of the heated portion by discontinuous regions, and at least one of the discontinuous regions is provided in the circumferential direction and extends in a direction intersecting the circumferential direction.
2. An inductively heated roller as recited in claim 1,
the heat equalizer is a cylindrical member having a slit formed in a portion corresponding to the discontinuous region.
3. An inductively heated roller as recited in claim 2,
the heat spreader is connected to at least one of the two ends in the axial direction over the entire circumference in the circumferential direction.
4. An inductively heated roller as recited in claim 3,
a plurality of the slits are formed.
5. An inductively heated roller as recited in claim 2,
the slit extends in the axial direction over the entire length of the heat equalizer.
6. An inductively heated roller as recited in claim 1,
a plurality of heat spreaders are arranged so as to be separated from each other in the circumferential direction,
the discontinuous region is formed between two of the heat-equalizing bodies adjacent to each other in the circumferential direction.
7. An inductively heated roller as recited in any of claims 1 to 6,
spacers made of an insulating material are disposed in the discontinuous regions.
8. An inductively heated roller as recited in any of claims 1 to 7,
an insulating film having a lower thermal resistance than the heated portion and having an insulating property is disposed on a contact surface of the heat equalizer, the contact surface being in contact with the heated portion.
9. An inductively heated roller as recited in any of claims 1 to 8,
the relative magnetic permeability of the soaking member is lower than that of the heated portion.
10. A spinning draft machine having the induction heating roller according to any one of claims 1 to 9,
a plurality of wires are wound around the surface of the induction heating roller in parallel in the axial direction.
Technical Field
The invention relates to an induction heating roller and a spinning traction machine.
Background
For example, as described in patent document 1, an induction heating roller is known in which the temperature of the roller surface is raised by induction heating using a coil. In such an induction heating roller, it is difficult to make the amount of heat generated by induction heating uniform in the axial direction, and the temperature of the roller surface tends to become nonuniform in the axial direction. Therefore, in the induction heating roller described in patent document 1, a jacket chamber in which a heat medium of a gas-liquid two-phase is sealed is provided to extend in the axial direction with respect to the roller main body. The jacket chamber functions as a heat pipe, whereby the temperature of the roll surface is uniformized in the axial direction.
Disclosure of Invention
Problems to be solved by the invention
In the configuration in which the heat pipe (jacket chamber) is provided in the roller main body as in patent document 1, the thickness of the roller main body has to be increased in order to dispose the heat pipe. As a result, the heat capacity of the roller main body increases, and there is a problem that the temperature of the roller surface cannot be raised efficiently.
Therefore, the inventors of the present application studied the following: a heat equalizer having a higher thermal conductivity than the roller body is provided in contact with the inner peripheral surface of the inductively heated roller body. The soaking body in contact with the roller main body functions as a heat pipe, whereby the temperature distribution in the axial direction of the roller main body, which is increased in temperature by induction heating, can be made uniform. Further, the thickness of the roller main body can be reduced as compared with the case where the heat pipe is provided to the roller main body. As a result, the temperature of the roll surface can be effectively raised.
As a material of the soaking body, a metal having relatively high thermal conductivity, such as copper or aluminum, may be used. However, copper, aluminum, and the like have conductivity. When a material having electrical conductivity is used as the material of the soaking body, an eddy current generated in the roller main body by electromagnetic induction also flows in the soaking body, and the soaking body generates heat. Since the soaking body generates heat, there is a problem that the temperature of the roll surface cannot be raised efficiently.
The invention aims to provide an induction heating roller and a spinning traction machine, which can inhibit eddy current flowing in a conductive soaking body and effectively raise the temperature of the roller surface.
The induction heating roller of claim 1 is characterized by comprising: a coil; a cylindrical heated portion arranged radially outside the coil and inductively heated by the coil; and a heat equalizing body that is formed of a material having a higher thermal conductivity than at least an inner peripheral surface of the heated portion and having electrical conductivity, extends in an axial direction of the heated portion, and is disposed in contact with the inner peripheral surface of the heated portion, and is discontinuous in a circumferential direction of the heated portion by discontinuous regions that are provided at least one in the circumferential direction and extend in a direction intersecting the circumferential direction.
In the present invention, the soaking body is discontinuous in the circumferential direction of the heated portion by the discontinuous region. Therefore, in the portion of the soaking body which becomes discontinuous in the circumferential direction, the eddy current can be suppressed from flowing so as to surround in the circumferential direction. Therefore, the soaking body hardly generates heat, and thus the temperature of the roller surface (the surface of the heated portion) can be efficiently increased.
The induction heating roller according to
In the present invention, the slits formed in the cylindrical member function as discontinuous regions. Therefore, the eddy current can be suppressed from flowing so as to surround the heat equalizer in the circumferential direction at the portion where the slit is formed.
The induction heating roller according to
In the present invention, the slits formed in the cylindrical member, i.e., the heat equalizer, are not formed over the entire length of the heat equalizer in the axial direction, and no slit is formed in at least one of the two end portions of the heat equalizer. Therefore, the shape of the heat equalizer is easily maintained, and the assembly of the heat equalizer becomes easy.
The induction heating roller according to claim 4 is characterized in that, in the above-described
When a heat-equalizing body, which is a cylindrical member having slits, has portions connected over the entire circumference in the circumferential direction, eddy current flows through the portions connected in the circumferential direction, and heat is generated. In this case, the range in which heat generation occurs is larger as the distance from the portion where the slit is formed in the circumferential direction is larger. In the present invention, by forming a plurality of slits, the range in which the heat spreader generates heat can be suppressed from expanding.
The induction heating roller according to claim 5 is characterized in that, in the above-described
In the present invention, the slit functioning as the discontinuous region extends over the entire length of the heat equalizing body in the axial direction, and therefore, the heat equalizing body becomes discontinuous in the circumferential direction over the entire region in the axial direction. Thus, it is possible to suppress the eddy current from flowing in the circumferential direction in the entire region in the axial direction of the soaking body. Therefore, the temperature of the roller surface (surface of the heated portion) can be further effectively increased by further making the heat equalizer more resistant to heat generation.
The induction heating roller according to claim 6 is characterized in that, in the above-described 1 st aspect, a plurality of the soaking bodies are arranged so as to be separated from each other in the circumferential direction, and the discontinuous region is provided between two adjacent soaking bodies in the circumferential direction.
In the present invention, a discontinuous region is provided between two heat equalizers adjacent in the circumferential direction, and therefore, the heat equalizers become discontinuous in the circumferential direction. This can suppress the eddy current from flowing in the soaking body so as to circumferentially surround the soaking body.
The induction heating roller of claim 7 is characterized in that, in any one of the above inventions 1 to 6, spacers made of a material having an insulating property are arranged in the discontinuous regions.
In the present invention, the spacers are disposed in the discontinuous regions, which are the cutouts of the heat spreader, so that the shape of the heat spreader is easily maintained, and the heat spreader is easily assembled. Further, since the spacer is formed of a material having an insulating property, the effect of suppressing the eddy current from flowing in the circumferential direction of the heat spreader can be maintained.
An induction heating roller according to claim 8 is characterized in that, in any one of the above inventions 1 to 7, an insulating film having a lower thermal resistance than the heated portion and having an insulating property is disposed on a contact surface of the heat equalizer, the contact surface being in contact with the heated portion.
In the present invention, the insulating film having an insulating property can prevent an eddy current generated in the heated portion by electromagnetic induction from flowing through the soaking body. This can further suppress the flow of eddy current in the heat spreader. Further, since the thickness of the insulating film is thin, the thermal resistance thereof is low. Therefore, the gap between the heated portion and the heat spreader is filled with the insulating film, and the thermal conductivity between the heated portion and the heat spreader can be improved.
The induction heating roller of claim 9 is characterized in that, in any one of the above inventions 1 to 8, the relative permeability of the heat equalizing body is lower than the relative permeability of the heated portion.
In the present invention, the magnetic flux is less likely to pass through the soaking member than the heated portion. Therefore, the magnetic flux can be suppressed from passing through the soaking body to generate an eddy current in the soaking body.
The spinning and drawing machine of
As described above, the induction heating roller provided in the spinning haul-off machine of the present invention can suppress the eddy current flowing in the soaking body, make the soaking body less likely to generate heat, and effectively raise the temperature of the roller surface (the surface of the heated portion). Therefore, the yarn wound around the induction heating roller in the spinning draft machine can be efficiently heated.
Drawings
Fig. 1 is a schematic view showing a spinning tractor including an induction heating roller according to embodiment 1 of the present invention.
Fig. 2 is a sectional view of a surface of an induction heating roller according to embodiment 1 of the present invention along the axial direction.
Fig. 3 is a cross-sectional view of the outer cylindrical portion and the heat equalizer shown in fig. 2, the cross-sectional view being perpendicular to the axial direction.
Fig. 4 is a perspective view of the heat spreader shown in fig. 2.
Fig. 5 is a cross-sectional view of the outer cylinder part of the induction heating roller and the surface of the soaking body orthogonal to the axial direction according to
Fig. 6 is a perspective view of the soaking body shown in fig. 5.
Fig. 7 is a perspective view of a heat equalizer of an induction heating roller according to modification 1 of embodiment 1.
Fig. 8 is a perspective view of a heat equalizer of an induction heating roller according to
Fig. 9 is a perspective view of a heat equalizer of an induction heating roller according to
Fig. 10 is a perspective view of a heat equalizer of an induction heating roller according to a modification of
Detailed Description
< embodiment 1 >
Hereinafter, embodiment 1 of the present invention will be described with reference to the drawings.
(schematic configuration of spinning and drawing machine 1)
Fig. 1 is a schematic view showing a spinning tractor 1 including an induction heating roller according to the present embodiment. As shown in fig. 1, the spinning draft machine 1 is configured such that a plurality of (6 in this case) yarns Y spun from the
The
The spinning and
The lower 3
The plurality of yarns Y introduced into the incubator 12 through the
The plurality of yarns Y stretched by the
(constitution of Induction heating roller 30)
Fig. 2 is a sectional view of a surface of the induction heating roller 30 of the present embodiment along the axial direction. In fig. 2, only a part of the output shaft 51 and the housing 52 is shown for the motor 50 coupled to the induction heating roller 30. The induction heating roller 30 shown in fig. 2 is a roller applied to all of the
The induction heating roller 30 has: a
The
Fig. 3 is a cross-sectional view of the outer
The
The outer diameter of the
The
A shaft mounting hole 34a extending in the axial direction is formed in the shaft center portion 34 of the
The coil 32 is configured such that a lead wire is wound around an outer peripheral surface of a cylindrical bobbin member 39. Although not shown, the bobbin member 39 is not completely cylindrical, but has a C-shaped cross-sectional shape in which a part of the circumferential direction is cut. Therefore, eddy current along the circumferential direction is less likely to flow in the bobbin member 39, and heat generation in the bobbin member 39 can be suppressed. The bobbin member 39 is mounted to a housing 52 of the motor 50. An annular recess 52a is formed in the housing 52, and the fixing member 37 is disposed in the recess 52a so as not to contact the bottom surface or the side surface of the recess 52 a. An output shaft 51 of the motor 50 is rotatably supported by the housing 52 via a bearing not shown, and when the motor 50 is operated, the induction heating roller 30 rotates integrally with the output shaft 51.
When a high-frequency current is supplied to the coil 32, a variable magnetic field is generated around the coil 32. The induction heating is joule heat utilizing eddy current flowing in the circumferential direction due to the electromagnetic induction effect at this time. In the present embodiment, since the soaking
In the present embodiment, the
(Effect of embodiment 1)
As described above, the induction heating roller 30 of embodiment 1 includes the soaking
In embodiment 1, the
In embodiment 1, the
In embodiment 1, an insulating
In embodiment 1, the soaking
Further, in the spinning and drawing machine 1 of embodiment 1, a plurality of yarns are wound and hung in parallel in the axial direction on the surface of the induction heating roller 30. As described above, the induction heating roller 30 of the present embodiment can suppress the eddy current from flowing in the soaking
<
Next,
As in embodiment 1, the soaking
As shown in fig. 5 and 6, the soaking
Each of the soaking
(Effect of embodiment 2)
In
(modification example)
While the embodiments of the present invention have been described above with reference to the drawings, the specific configurations should not be construed as being limited to the embodiments. The scope of the present invention is defined by the claims rather than the description of the embodiments, and includes all modifications within the meaning and range equivalent to the claims.
For example, as shown in fig. 7, which is a perspective view of the soaking body 236 of the induction heating roller of modification 1 of embodiment 1, the soaking body 236 of the induction heating roller of this modification is continuous at one end portion in the axial direction (the right end portion in fig. 7) over the entire circumference in the circumferential direction. That is, the slits 236a formed in the soaking body 236 and extending in the axial direction are not formed at one end portion of the soaking body 236 in the axial direction, but extend from the vicinity of the one end portion to the other end portion of the soaking body 236 in the axial direction. That is, in the present modification, the discontinuous region 240 extends from the vicinity of one end portion in the axial direction of the soaking body 236 to the other end portion in the axial direction. Since the cylindrical soaking body 236 has the portion continuous over the entire circumference in the circumferential direction, the shape of the soaking body 236 is easily maintained, and the assembly of the soaking body 236 is easy.
In addition, eddy current flows in the circumferential direction in a portion of the soaking body 236 that is continuous over the entire circumference in the circumferential direction, and heat generation occurs. In order to effectively raise the temperature of the roller surface 31a (the surface of the outer tube 33), the heat generation range of the soaking member 236 is preferably narrow. Therefore, from the viewpoint of narrowing the heat generation range, it is preferable that the width (axial length) of the portion continuous over the entire circumference in the circumferential direction is narrow.
The portions of the heat equalizing body 236 that are connected over the entire circumference in the circumferential direction may be either one of the front and rear directions, or may be connected at both end portions in the axial direction (front and rear direction). Alternatively, they may be connected at an axially intermediate portion.
As shown in fig. 8, which is a perspective view of the soaking
When there is a portion that is continuous over the entire circumference in the circumferential direction in the
The number of the
Further, as shown in fig. 9, which is a perspective view of the soaking
By disposing the
As shown in fig. 10, which is a perspective view of the soaking
In the above-described embodiment, the case where the discontinuous regions 40(140, 240, 340, 440, and 540) extend in the axial direction has been described, but the present invention is not limited to this. That is, the extending direction of the discontinuous region 40(140, 240, 340, 440, 540) may be a direction intersecting the circumferential direction.
Further, in the above-described embodiment, the case where the insulating
In the above-described embodiment, the case where the relative permeability of the soaking body 36(136, 236, 336, 436, 536) is lower than the relative permeability of the outer cylinder portion 33 (roller main body 31) has been described, but the relative permeability of the soaking body 36(136, 236, 336, 436, 536) is not limited to this.
In the above embodiment, the case where the soaking
In the above embodiment, the case where the
In the above embodiment, the case where a plurality of yarns Y are wound around one induction heating roller 30 has been described, but the present invention can also be applied to an induction heating roller around which one yarn is wound.
Description of the symbols
1: a spinning tractor; 30: an induction heating roller; 32: a coil; 33: an outer tube section (heated section); 36. 136, 236, 336, 436, 536: a heat equalizer; 36a, 236a, 336a, 436 a: a slit; 36b, 136 b: an insulating film; 40. 140, 240, 340, 440, 540: a discontinuous region; 438. 538: a spacer.
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