JPS6332896B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an induction heating roller used in a synthetic fiber drawing/heating process, such as a direct spinning/drawing apparatus, and more particularly to a jacketed induction heating roller.

Such a jacketed induction heating roller has been widely used in recent years and is already well known because it can make the surface temperature pattern of the roller shell portion more uniform and is more resistant to load fluctuations than an induction heating roller without a jacket. For example, as shown in FIG. 1, a jacket portion 5 is formed by closely adhering a cylindrical lining material 3 having fins 2 to the inner circumferential surface of a roller shell 1, and further welding an inner wall material 4. A heat medium such as dowsum or distilled water is vacuum sealed in the jacket part 5 according to the operating temperature, and the heat medium is heated by the cylindrical lining material 3, evaporates, and moves inside the jacket part 5. Since it acts to give heat to the low temperature part and cause condensation, heat transfer by the heat medium occurs within the jacket part 5, and the surface temperature of the roller shell 1 is made uniform. In addition, as another jacketed induction heating roller, a roller shell outer cylindrical member 6 is used as shown in FIG.
Another example is one in which a jacket is formed by closely fitting a roller shell inner cylindrical member 9 having a large number of axial grooves 7 and circumferential grooves 8 formed on its outer peripheral surface. In FIGS. 1 and 2, 13 is a rotationally driven shaft, and 14 and 15 are an iron core and a coil that constitute a magnetic flux generation mechanism.

It goes without saying that such conventional induction heating rollers with jackets are very expensive due to their complicated structure, but when enclosing the heat transfer liquid, it is necessary to avoid air, etc. There is a problem in that it is difficult to completely remove the inert gas. This problem has the serious result that during use, the inert gas prevents heat transfer by the heat medium vapor, and the surface temperature pattern of the roller shell part is not uniform. Furthermore, although it is common practice to seal the jacket with a sealing plug after filling the heat transfer liquid, there is a problem in that the sealing plug becomes complicated because the interior of the jacket becomes a negative pressure side when not in use or when used at low temperatures. Furthermore, depending on the type of the heat transfer liquid, the roller shell 1, the cylindrical lining material 3, the inner wall material 4, the roller shell outer cylinder material 6,
There is a problem in that the material of the roller inner cylindrical member 9 is limited, making it difficult to manufacture the completely sealed structure described above. For example, if water is used as the heat transfer liquid,
Materials such as metallic aluminum, carbon steel, and stainless steel are inappropriate for the following reasons. That is, water and the structural material metal (M) react as shown in the following equation to generate hydrogen (M+H ₂ O→MO+H ₂ ↑). By the way, hydrogen is one of the above-mentioned inert gases, and it gradually accumulates to prevent heat transfer by the heat medium vapor, which causes the same serious result as mentioned above that the surface temperature pattern of the roller shell part is not uniform. be.

In order to solve this problem, the present inventors focused on heat pipes, which have made remarkable progress in development in recent years, and as a result of intensive studies, they arrived at the present invention.

That is, the present invention provides a roller shell made of a magnetic material, a secondary conductive layer provided along the inner circumferential surface of the roller shell and a jacket encapsulating a heat medium, and a jacket provided inside the roller shell and provided with the roller shell. In an induction heating roller consisting of a magnetic flux generation mechanism that generates alternating magnetic flux in the axial direction of
The induction heat generating roller is characterized in that the jacket is formed by arranging a cylindrical closed container containing a heating medium liquid parallel to the axis of the roller shell and concentrically with the roller shell.

The present invention will be explained below based on examples and with reference to the drawings.

3 and 4 are a longitudinal (axial) sectional view and a lateral sectional view of the roller shell portion of an induction heating roller according to an embodiment of the present invention, and FIGS.
The figures are a longitudinal sectional view and a lateral sectional view of the roller shell portion of an induction heating roller according to another embodiment of the present invention.

As shown in FIGS. 3 and 4, the basic structure of the induction heating roller of this embodiment is the same as that of the conventional roller described above. That is, a roller shell 1 that processes yarn, etc., a shaft 13 of a drive motor (not shown) that supports and rotates the roller shell 1, and a magnetic flux generation mechanism that generates alternating magnetic flux in the axial direction of the roller shell 1 are configured. It consists of an iron core 14 and a coil 15.

On the other hand, as shown in FIG. 4, the jacket differs from the conventional one in that a cylindrical pipe-shaped closed container 10 containing a heat transfer liquid is placed along the inner circumferential surface of the roller shell 1, and the jacket is attached to the shaft of the roller shell 1. The roller shell 1 is arranged parallel to the roller shell 1 in the circumferential direction, that is, concentrically with the roller shell 1. The closed container 10 is attached along the inner peripheral surface of the roller shell 1 via a secondary conductive layer ring 11 which is a known secondary conductive layer made of a conductive material. Moreover, the secondary conductive layer ring 1
1 is provided with a surface circumferential groove 12 for adjusting the amount of heat transferred to the roller shell 1.

By the way, such a configuration is manufactured as follows. That is, first, a large number of closed containers 10 are manufactured by sealing the heat transfer liquid in a cylindrical container in a vacuum state using the most suitable material for the heat transfer liquid to be sealed. Here, for example, in a case where water is used as a heat transfer liquid, copper material is most suitable for the closed container 10. Note that the method for manufacturing the container and the method for enclosing the heat medium can be applied as is, so a description thereof will be omitted since the method for manufacturing a known heat pipe can be applied as is. Next, the closed container 10 is heated and its characteristics are inspected to remove the above-mentioned inert gas and other substances that may have an influence. Then, the selected closed containers 10 are placed concentrically at appropriate intervals in a mold for a secondary conductive layer ring 11 manufactured to correspond to the roller shell 1, and made of aluminum or the like that will become the secondary conductive layer ring 11. It is cast using a conductive material.

Secondary conductive ring 1 manufactured in this way
The outer diameter of 1 is determined so as to be in close contact with the inner diameter of the roller shell 1, and depending on the amount of heat dissipated from the outer surface of the roller shell 1 and the amount of load, the secondary conductive ring 11 is connected to the roller. A circumferential groove 12 on the surface so that the amount of heat transfer to the shell 1 is adjusted.
is properly formed. Thereafter, the secondary conductive ring 11 is closely fitted to the roller shell 1 and adhesively fixed by silver soldering or the like.

The roller shell 1 is rotated by the shaft 13 of a drive motor (not shown), and an alternating voltage is applied to the coil 15 of the magnetic flux generation mechanism. As a result, the alternating magnetic flux forms a magnetic field with the iron core 14 and the roller shell 1 as a magnetic path, and a short circuit current is generated in the secondary conductive ring 11 and an eddy current is generated in the roller shell 1, thereby heating it. In this way, the heat generated in the secondary conductive ring 11 is transferred to the roller shell 1, but due to the windage load during rotation of the roller shell 1 and the heat treatment caused by being wound around the roller shell 1. Since the load of the threads and the like varies significantly in the axial direction of the roller shell 1, a large difference tends to occur in the axial surface temperature of the roller shell 1. However, the sealed container 1
By repeating the evaporation action in the high temperature part and the condensation action in the low temperature part, the heat medium sealed in the roller shell 1 freely generates heat movement in the axial direction of the roller shell 1, thereby changing the axial temperature distribution of the roller shell 1. It has a jacket effect that evens out the water. Furthermore, the surface circumferential groove 12 is adjusted in position and width to compensate for significantly different loads in the axial direction of the roller shell 1.
The amount of heat transferred from the secondary conductive ring 11 to the roller shell 1 is adjusted by the annular gap formed by the above. Therefore, the difference in surface temperature due to the significantly different load amount in the axial direction of the roller shell 1 is compensated and made uniform by the jacket effect in the sealed container 10 and the adjustment of the amount of heat transfer by the annular gap. .

Next, another embodiment of the present invention will be described with reference to FIGS. 5 and 6. As can be seen from the drawings, the basic configuration of this embodiment is the same as that of the previously described embodiment, so a description thereof will be omitted. The numbers in FIGS. 5 and 6 are the same as those in FIGS. 3 and 4.

By the way, the jacket of this embodiment is different from the above-mentioned embodiments, and is made of a conductive material, and as shown in FIG. 6, its cross-sectional outline is a fan-like trapezoid, which is an annular shape divided into an appropriate number of sections by straight lines passing through its center. A cylindrical airtight container 10' is placed parallel to the roller shell 1's axis along the inner circumferential surface of the roller shell 1, concentrically and in close contact with the roller shell 1, and they are welded with a conductive material such as silver solder to generate electricity. It has a configuration in which it is connected. Therefore,
The side walls of the closed container 10' form a secondary conductive layer ring, which is a known secondary conductive layer.

Such a configuration is obtained by manufacturing and inspecting the sealed container 10' in the same manner as in the above-mentioned embodiment, and by using the tested sealed container 10'.
0' can be easily manufactured by sequentially welding the inner peripheral surface of the roller shell 1 so as to be in close contact with the inner circumferential surface of the roller shell 1. Here, it is preferable to weld the same material as the constituent material of the sealed container 10', but as mentioned above, a conductive material such as silver solder may also be used.

By the way, as for the effect of the above structure, due to the heating medium sealed in the closed container 10' and the secondary conductive layer ring constituted by the side wall of the closed container 10',
It is clear that this embodiment has the same effects as those of the above-mentioned embodiments, so the explanation thereof will be omitted. In addition, if an annular gap is provided by the circumferential groove as in the above embodiment and the amount of heat transfer between the secondary conductive layer ring and the roller shell 1 is adjusted, the axial temperature distribution of the roller shell 1 can be made even more uniform. Needless to say, this can be achieved.

Although the present invention has been described in detail above, the present invention is not limited to such embodiments.

For example, in the case shown in FIG.
0 was manufactured in the shape of a cylindrical pipe, but it goes without saying that any shape may be used. Further, a closed container with a shape that communicates with the circumferential direction is preferable, but according to the findings of the present inventors, in the case of a rotating roller used for yarn heat treatment, the heating medium liquid is simply evaporated and condensed in the axial direction. Simply repeating the action to generate heat transfer is sufficient to uniformize the roller surface temperature.

Furthermore, in the case of FIG. 6, the conductive closed container 1
Although the cross-sectional shape was made to form an annular body simply by connecting a large number of 0', a cylindrical body was formed by simply making it into a circumferential pipe shape and filling the gap with adhesive means such as silver solder. It goes without saying that you may do as you wish. In short, it goes without saying that any material that can form a conductive annular body in the circumferential direction by connecting a large number of cylindrical conductive closed containers will suffice.

As explained above, according to the present invention, a sealed container having a structure similar to that of a heat pipe, which has been developed in recent years, is inspected in advance to confirm that there is no harmful effect such as inert gas, and then used, so that the jacket effect is ensured. can be obtained. Furthermore, the structure is very simple and since a secondary conductive layer is provided, efficient heating is possible. Particularly, in the embodiment shown in FIGS. 3 and 4, the sealed container 10 is completely cast into the secondary conductive ring 11, so even if it repeatedly expands and contracts due to the thermal history, leakage will occur from the sealed portion. This does not occur at all and can be used stably.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views of a conventional jacketed induction heating roller, respectively, and FIGS. 3 and 4 are longitudinal sectional views of an induction heating roller and its roller shell showing an embodiment of the present invention. FIGS. 5 and 6 are a longitudinal sectional view of an induction heating roller and a lateral sectional view of the roller shell portion, respectively, showing another embodiment of the present invention. 1 is a roller shell, 10, 10' is a closed container,
11 is a secondary conductive ring, and 12 is a surface circumferential groove.

Claims (1)

[Scope of Claims] 1. A roller shell made of a magnetic material, a secondary conductive layer provided along the inner peripheral surface of the roller shell and a jacket containing a heat medium, and a jacket provided inside the roller shell and containing a heat medium. In an induction heating roller comprising a magnetic flux generation mechanism that generates an alternating magnetic flux in the axial direction of the roller shell, a cylindrical closed container containing a heat transfer liquid is placed parallel to the axis of the roller shell and concentrically with the roller shell. An induction heating roller characterized in that the jacket is formed by arranging the jackets in parallel. 2. The induction heating roller according to claim 1, wherein the closed container is built into the secondary conductive layer. 3. The induction heating roller according to claim 2, wherein the closed container is cast into a conductive material forming the secondary conductive layer. 4. The airtight container is made of a conductive material, and
The induction heating roller according to claim 1, wherein the secondary conductive layer is formed by electrically connecting the sealed container. 5. The induction heating roller according to claim 4, wherein the closed containers are provided closely together and the closed containers are connected by welding. 6. Claims 1, 2 and 2, wherein a heat transfer resistance formed by an annular gap is arranged between the inner circumferential surface of the roller shell and the secondary conductive layer in the axial direction of the roller shell. The induction heating roller according to item 3, item 4, or item 5.