Induction Heating Roller With Discontinuous Heat Equalizer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing induction heating rollers with heat pipes in the roller body are thick, leading to inefficient heating due to large heat capacity and eddy currents generated by conductive materials used as heat equalizers, which interfere with effective heating of the roller surface.
Innovation Solution
A cylindrical heat equalizer made of conductive material with discontinuous areas in the circumferential direction is used to suppress eddy currents, ensuring effective heating by preventing heat generation in the equalizer and maintaining efficient temperature distribution along the roller surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat pipe (jacket chamber) is provided in a roller main body, then the temperature of the roller surface is equalized in the axial direction, but the roller main body becomes thick and the heat capacity increases, resulting in ineffective heating of the roller surface
Solution Approach 1:
The heat pipe function is extracted from the roller main body and implemented as a separate heat equalizer component that contacts only the induction-heated inner circumferential surface, eliminating the need for a thick roller body while maintaining temperature uniformity
Solution Approach 2:
A heat equalizer made of electrically non-conductive material is introduced as an intermediary component between the induction-heated roller surface and the roller body, serving as a heat pipe to equalize temperature without generating eddy currents
2Temperature
If an electrically conductive material is used as the material of the heat equalizer, then the heat equalizer can effectively equalize temperature, but eddy current flows in the heat equalizer causing heat generation that interferes with effective heating of the roller surface
Solution Approach 1:
The electrical conductivity parameter of the heat equalizer material is changed from conductive to non-conductive, eliminating eddy current generation while maintaining thermal conduction capability through materials like ceramic or resin
Solution Approach 2:
A composite structure is employed where a heat equalizer made of electrically non-conductive material (such as ceramic or resin) is used to achieve both thermal equalization and electrical insulation, preventing eddy current formation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively heats the roller surface by minimizing eddy current flow and heat generation in the heat equalizer, allowing for uniform temperature distribution and efficient heating of yarns in a spun yarn take-up machine.
Implementation Method 1
an induction heating roller which is configured to heat a roller surface by induction heating using a coil
Implementation Method 2
heating target which is cylindrical in shape, which is provided radially outside the coil, and which is induction-heated by the coil
Implementation Method 3
at least one heat equalizer which is made of an electrically conductive material which is higher in heat conductivity than at least an inner circumferential surface of the heating target
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the present invention is to provide an induction heating roller and a spun yarn take-up machine which suppress an eddy current from flowing in an electrically conductive heat equalizer and which effectively heat a roller surface. A cylindrical heat equalizer 36 formed of a material which is higher in heat conductivity than at least an inner circumferential surface of an outer cylindrical part 33 and which is electrically conductive is provided so as to make contact with the inner circumferential surface of the outer cylindrical part 33. At least one discontinuous area 40 extending in a direction which intersects with a circumferential direction is provided in the circumferential direction of the outer cylindrical part 33 so that the heat equalizer 36 is discontinuous in the circumferential direction.