Method and device for controlling temperature uniformity of heating roller

A technology of a control device and a control method, which is applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems such as the failure of the control accuracy of the temperature uniformity of the heating roller to achieve uniform temperature rise and fall, and control temperature uniformity. degree of effect

Inactive Publication Date: 2011-01-05
株洲科力通用设备有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0006] The problem to be solved by this patent invention is mainly: aiming at the deficiency that the control accuracy of the temperature uniformity of the existing heating roller cannot meet...
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Method used

Accompanying drawing 1 has provided an embodiment of the present invention, as can be seen from accompanying drawing, the present invention relates to a kind of control method of heating roller temperature uniformity, utilizes electromagnetic heating method to heat heating roller, and heating roller is middle Hollow hollow roller, the electromagnetic heating device is arranged in the hollow part of the heating roller; the electromagnetic heating device is more than three electromagnetic heating coils, and the temperature of the heating roller is controlled by controlling the heat generation of the electromagnetic heating coils respectively Spend. Said controlling the temperature uniformity of the heating roller by respectively controlling the heat generation of the electromagnetic heating coil is to arrange the electromagnetic heating coil in the hollow part of the heating roller along the axial direction of the heating roller, and according to the heat dissipation of the heating roller, each electromagnetic heating coil For different heating power; for the part of the heating roller with faster heat dissipation, the electromagnetic heating coil with higher heating power is used, and for the part of the heating roller with slower heat dissipation, the electromagnetic heating coil with smaller heating power is used to ensure the heat dissipation and absorption of the heating roller. The heat rate is the same, so that the temperature of the whole heating roller can be evenly raised and lowered.
The control device of a kind of heating roller temperature uniformity that proposes according to above-mentioned method is: a kind of control device of heating roller temperature uniformity, comprises heating roller 2, heating roller supporting device 3 and heating device 1; Heating roller 2 Installed on the heating roller supporting device 3, the heating roller 2 is a hollow heating roller with a hollow middle part, and a heating device 1 is installed in the hollow part of the heating roller 2 center, and the heating device 1 is an electromagnetic heating device; the electromagnetic heating device 1 8 electromag...
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Abstract

The invention discloses a method and a device for controlling the temperature uniformity of a heating roller. In the invention, the heating roller is heated by an electromagnetic heating process, the heating roller is a hollow roller of which the middle is hollow, an electromagnetic heating device is arranged in the hollow part of the heating roller; and the electromagnetic heating device comprises more than three electromagnetic heating coils, and the heat productivities of the electromagnetic heating coils are controlled respectively to control the temperature uniformity of the heating roller. Controlling the temperature uniformity of the heating roller by controlling the heat productivities of the electromagnetic heating coils respectively is arranging the electromagnetic heating coils in the hollow part of the heating roller and along the axial direction of the heating roller, wherein the heating powers of the electromagnetic heating coils are different according to the radiation condition of the heating roller, namely electromagnetic heating coils with high heating powers are used for the parts, on which radiation is quick, of the heating roller, while electromagnetic heating coils with low heating powers for the parts, on which radiation is low, of the heating roller, so as to ensure the radiation rate and heat absorption rate of the heating roller are the same; and thus, the temperature of the entire heating roller raises and falls uniformly.

Application Domain

Temperatue control

Technology Topic

Absorption rateHollow core +4

Image

  • Method and device for controlling temperature uniformity of heating roller
  • Method and device for controlling temperature uniformity of heating roller
  • Method and device for controlling temperature uniformity of heating roller

Examples

  • Experimental program(2)

Example Embodiment

[0013] Embodiment one
[0014] attached figure 1 An embodiment of the present invention is given, and it can be seen from the accompanying drawings that the present invention relates to a method for controlling the temperature uniformity of a heating roller. The heating roller is heated by an electromagnetic heating method, and the heating roller is a hollow roller with a hollow center. The heating device is arranged in the hollow part of the heating roller; the electromagnetic heating device is more than three electromagnetic heating coils, and the temperature uniformity of the heating roller is controlled by controlling the calorific value of the electromagnetic heating coils respectively. Said controlling the temperature uniformity of the heating roller by respectively controlling the heat generation of the electromagnetic heating coil is to arrange the electromagnetic heating coil in the hollow part of the heating roller along the axial direction of the heating roller, and according to the heat dissipation of the heating roller, each electromagnetic heating coil For different heating power; for the part of the heating roller with faster heat dissipation, the electromagnetic heating coil with higher heating power is used, and for the part of the heating roller with slower heat dissipation, the electromagnetic heating coil with smaller heating power is used to ensure the heat dissipation and absorption of the heating roller. The heat rate is the same, so that the temperature of the whole heating roller can be evenly raised and lowered.
[0015] A control device for temperature uniformity of a heating roller proposed according to the above method is: a control device for temperature uniformity of a heating roller, comprising a heating roller 2, a heating roller supporting device 3 and a heating device 1; the heating roller 2 is installed on the heating On the roller supporting device 3, the heating roller 2 is a hollow heating roller whose middle part is hollow, and a heating device 1 is installed in the hollow part of the heating roller 2, and the heating device 1 is an electromagnetic heating device; the electromagnetic heating device 1 is 8 The electromagnetic heating rings are arranged in even numbers, respectively the first electromagnetic heating ring 3, the second electromagnetic heating ring 4, the third electromagnetic heating ring 5, the fourth electromagnetic heating ring 6, the fifth electromagnetic heating ring 7, the sixth electromagnetic heating ring 8, The seventh electromagnetic heating ring 9 and the eighth electromagnetic heating ring, the first electromagnetic heating ring 3, the second electromagnetic heating ring 4, the third electromagnetic heating ring 5, the fourth electromagnetic heating ring 6, the fifth electromagnetic heating ring 7, the sixth electromagnetic heating ring The electromagnetic heating ring 8, the seventh electromagnetic heating ring 9 and the eighth electromagnetic heating ring 10 are axially arranged in the hollow part of the heating roller, and each electromagnetic heating ring has a different heating power; the power of the electromagnetic heating ring depends on the heat dissipation of the heating roller. The conditions are adjusted independently; wherein, the two ends 12 and 13 of the heating roller with faster heat dissipation adopt electromagnetic heating coils with higher heating power, and the middle part of the heating roller with slower heat dissipation adopts electromagnetic heating coils with lower heating power. To ensure that the heat dissipation and heat absorption rate of the heating roller are the same, so that the temperature of the entire heating roller can rise and fall evenly. That is, the heating power of the first electromagnetic heating coil 3 and the eighth electromagnetic heating coil 10 is the largest, the heating power of the second electromagnetic heating coil 4 and the seventh electromagnetic heating coil 9 is second, and the third electromagnetic heating coil 5 and the sixth electromagnetic heating coil The heating power of 8 is the third, and the heating power of the fourth electromagnetic heating coil 6 and the fifth electromagnetic heating coil 7 is the smallest. The heating roller 2 is mounted on the heating roller supporting device 3 through a bearing 11 .
[0016] The temperature curve relationship between the heating roller and the electromagnetic heating coil is as attached figure 2 shown. From attached figure 2 It can be seen that the temperature distribution curve of the heating roller due to heat dissipation is shown in curve 14, and the temperature at both ends is low due to fast heat dissipation; so the heat provided by the electromagnetic heating coil is shown in curve 15 according to the heat dissipation of the heating roller . If the heat loss at both ends is large, it can be compensated by increasing the power of the electromagnetic heating coil to ensure the balance of residual heat, thereby ensuring the temperature uniformity of the heating roller.
[0017] The number of electromagnetic heating rings can also be 4, 6 or 10 and other even numbers of electromagnetic heating rings, which are uniformly distributed in the central hollow part of the heating roller 2 in the axial direction. The electromagnetic heating coil is fixed on the heating roller supporting device 3 and does not rotate with the heating roller.

Example Embodiment

[0018] Embodiment two
[0019] The principle of the second embodiment is the same as that of the first embodiment, except that the electromagnetic heating coils are arranged in odd numbers, such as 3, 5, 7, 9 and other odd numbers of electromagnetic heating coils. The electromagnetic heating coil is fixed in the heating roller 2 and rotates with the heating roller.

PUM

no PUM

Description & Claims & Application Information

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