JPH0548394Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an induction heating roller device, particularly an induction heating roller device with a cooling function.

(Prior Art) In this type of device, the roller that generates heat by induction is sometimes required to have a cooling function.
For this purpose, an intermediate heat medium is sealed inside the rotatably supported roller, and this is cooled by a cooling medium flowing in and out from the outside, thereby cooling the roller. has been proposed separately (see Utility Model Publication No. 13352/1983).

According to this, the roller is conveniently cooled by the heat medium to be cooled, but the heat transfer from the roller passes through the intermediate heat medium and the cooling medium in turn, and the sensible heat of the intermediate heat medium The heat transfer depends on the exchange of

As a result, not only is rapid cooling not possible, but the surface temperature of the roller becomes extremely high compared to the temperature of the cooling medium, resulting in the disadvantage that the load cannot be cooled sufficiently.

Furthermore, each heat transfer coefficient between the inner circumferential wall of the roller and the intermediate heat medium, and between the water pipe through which the cooling medium flows and the intermediate heat medium is determined by the heat transfer coefficient between the intermediate heat medium and the inner circumferential wall of the roller or the water pipe. Without relative motion, the value would be extremely low, and the overall heat transfer coefficient would be even lower.

In other words, when the roller is rotating at high speed,
The intermediate heat medium is appropriately stirred and a flow is generated between the inner wall of the roller and the water pipe, so it exhibits relatively good cooling ability, but conversely, when rotating at low speed, the cooling ability decreases. As a result, its cooling capacity becomes unstable. Such instability cannot be resolved even if the flow rate, temperature, etc. of the cooling medium are controlled.

(Problems to be solved by the invention) This invention aims to improve the overall heat transfer coefficient, stabilize the cooling capacity, and facilitate the control of the cooling capacity when equipping the roller with cooling capacity. The purpose is to

(Means for Solving the Problems) This invention provides a jacket chamber in which a gas-liquid two-phase heating medium is sealed inside the peripheral wall of a roller body that is provided with an induction heating mechanism inside, and at least one side of the jacket chamber. A sub-jacket chamber is provided that communicates with the end of the roller body and projects from the end of the roller body,
Furthermore, a cover is attached to cover the sub-jacket chamber, and a refrigerant for cooling the sub-jacket chamber is allowed to flow in and out into the cover.

(Example) An example of this invention will be described with reference to the drawings. 1st
In the embodiment shown in the figure, a roller main body 1 is provided with hollow shafts 2 at both ends, and is rotatably supported on a machine base 4 by bearings 3 on the outside thereof. It is then rotated by a suitable external drive source (for example, a motor).

A jacket chamber 5 is provided inside the peripheral wall of the roller body 1. This may be provided along the entire circumference inside the peripheral wall of the roller body 1, or may be provided as a plurality of independent or hole-shaped jacket chambers lined up along the circumference, or that are in communication with each other at their ends. It may be. Inside the jacket chamber 5, a gas-liquid two-phase heat medium such as water and oil is sealed under reduced pressure.

Sub-jacket chambers 6 are provided that protrude from a plurality of locations on both end sides of the roller body 1 and communicate with the jacket chamber 5. This sub-jacket chamber 6 is constructed of, for example, a hollow tube. Fins 7 are attached to the outer periphery if necessary.

A roller body 1 from which a sub-jacket chamber 6 protrudes
The end face of is covered with a cover 8. A seal 9 for liquid sealing is formed between the cover 8 and the end face of the roller body 1.
(for example, an O-ring),
Further, the cover 8 is fixedly supported by the machine base 4, for example. A cooling medium for cooling the sub-jacket chamber 6 flows in and out of the cover 8. 10A, 10B
are the inlet and outlet of the cooling medium.

Reference numeral 11 denotes an induction heating mechanism, which is composed of an iron core 11A and an induction coil 11B, and the iron core 11A is supported by a hollow shaft 12. axis 12
is supported inside the shaft 2 via a bearing 13. 14 is a power line for connecting the induction coil 11B to an AC power source.

The peripheral wall of the roller body 1 generates heat by the induction heating mechanism 11, and the heat generation temperature of the peripheral wall of the roller body 1 is equalized by latent heat based on vaporization and evaporation of the heat medium in the jacket chamber 5. Since this is already well known, detailed explanation will be omitted.

To cool the roller body 1, a cooling medium is caused to flow into and out of the cover 8 using the inlet 10A and the outlet 10B. This allows the sub-jacket chamber 6 to be cooled. Sub-jacket compartment 6
Since the inside of the roller main body 1 communicates with the jacket chamber 5, the heat medium in the jacket chamber 5, which is vaporized by taking away the latent heat of the roller body 1, condenses inside the sub-jacket chamber 6 and gives latent heat.

By repeating this, the thermal energy of the roller body 1 is transferred to the cooling medium in the cover 8 via the heat medium in the jacket chamber 5 and the sub-jacket chamber 6, whereby the roller body 1 is heated. It will start to cool down.

When the roller body 1 rotates, the sub jacket chamber 6
The cooling medium also rotates at the same time, causing relative movement with the cooling medium that has flowed into the cover 8. This increases the heat transfer coefficient between the heat medium and the cooling medium. When the roller body 1 is rotating at a low speed, the relative motion described above is reduced, but in that case, by increasing the flow rate of the cooling medium and increasing the flow velocity within the cover 6, the heat transfer coefficient can be increased. A decline is avoidable.

Further, the cooling capacity can be adjusted over a wide range by changing the temperature of the cooling medium. Furthermore, even during cooling, the temperature-uniforming effect of the jacket chamber 5 is not lost, so the roller body 1
Needless to say, the surface temperature is made uniform.

In the above embodiment, the jacket chamber 5 was formed by a hole or a space provided in the peripheral wall of the roller body 1, but instead of this, it was formed by a heat pipe 21 as shown in FIG. You can. In this case, a hole may be formed in the peripheral wall of the roller body 1 along the axial direction, and the heat pipe 21 may be inserted through the hole.

This heat pipe 21 may be used as the jacket chamber 5, and its end may be made to protrude from the end of the roller body 1, and its tip may be used as the sub-jacket chamber 6. The fact that a gas-liquid two-phase heat medium is sealed inside the jacket chamber 5, and the effect of this structure are the same as in the previous embodiment.

(Effects of the invention) According to the invention detailed above, when cooling the roller body using an intermediate heat medium, it is possible to cool the roller body almost unaffected by the rotation of the roller body, and its cooling capacity This can be easily adjusted by controlling the flow rate, temperature, etc. of the cooling medium.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a sectional view showing another embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Roller main body, 2, 12... Shaft, 5... Jacket chamber, 6... Sub-jacket chamber, 8... Cover, 11... Induction heating mechanism.

Claims (1)

[Scope of utility model registration request] A jacket chamber containing a gas-liquid two-phase heating medium is provided inside the peripheral wall of the roller body, which is provided with an induction heating mechanism therein, and is connected to at least one end of the jacket chamber, and is connected to an end of the roller body. A sub-jacket chamber is provided that protrudes from the sub-jacket chamber, and a cover is attached to cover the sub-jacket chamber,
An induction heating roller device configured to cause a cooling medium to flow in and out of the cover for cooling the sub-jacket chamber.