Method and device for controlling temperature uniformity of heating roller

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.

Description

technical field [0001] The present invention relates to a device arrangement method and structure, especially a method and device for controlling the temperature uniformity of heating rollers. The international patent classification numbers are G01K, G08C and H04B, which are mainly used for the temperature Uniformity control. Background technique [0002] Heating rollers are widely used in plastic wire drawing, plastic plate making, composite film, laser printing, tanning, non-woven fabrics and other industries, mainly for heating materials; now the general heating rollers are mostly made of heat transfer oil or electric heating tube Heating methods, these two heating methods generally have disadvantages such as low thermal efficiency, high energy consumption, environmental pollution, low temperature control accuracy and poor temperature uniformity. Especially in terms of temperature detection, there are two ways to detect the temperature of the traditional heating roller: ...

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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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