Heating Roller Structure for Uniform Surface Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heating rollers with heat pipes at the outer cylindrical part require a thick structure, leading to high energy consumption and inefficient heating due to heat dissipation issues when a high thermal conductivity member is used to equalize temperature.
Innovation Solution
A cylindrical heat equalizing member with anisotropic thermal conductivity, where axial conductivity is higher than radial and circumferential conductivity, is used to contact the inner surface of the roller, suppressing heat dissipation and enhancing temperature uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat pipe (jacket chamber) is provided at the outer cylindrical part of the roller main body, then the temperature of the roller surface can be equalized in the axial direction, but the outer cylindrical part must be arranged to be thick, resulting in large heat capacity and high energy consumption
Solution Approach 1:
The invention extracts the heat pipe function from the outer cylindrical part by providing a separate cylindrical heat equalizing member with heat pipe functionality that contacts only the inner circumferential surface. This allows temperature equalization without requiring the entire outer cylindrical part to be thick, thereby reducing heat capacity and energy consumption.
Solution Approach 2:
The cylindrical heat equalizing member acts as an intermediary between the heating source and the yarns. It receives heat from the inner circumferential surface and distributes it axially through its high thermal conductivity, achieving temperature uniformity without requiring the outer cylindrical part itself to have heat pipe structure.
2Stability of the object's composition
If the outer cylindrical part is made thick to accommodate heat pipe, then temperature equalization is achieved, but the heat capacity increases requiring large energy input
Solution Approach 1:
The invention segments the heat equalization function from the structural body of the roller. The cylindrical heat equalizing member is a separate component that performs heat equalization independently, allowing the outer cylindrical part to be thin while still achieving temperature stability through the dedicated heat equalizing component.
Solution Approach 2:
The cylindrical heat equalizing member is made of material with higher thermal conductivity than the roller main body, creating a composite structure where the inner heat equalizing member handles thermal distribution while the outer cylindrical part provides structural support with minimal thickness.
3Length of stationary object
If a heat equalizing member with high thermal conductivity is simply made contact with the inner circumferential surface, then the thickness can be decreased, but the roller surface is less efficiently heated than expected
Solution Approach 1:
The invention applies local quality by making the thermal conductivity of the heat equalizing member anisotropic - high in the axial direction for heat distribution but lower in the radial direction to prevent heat loss. This localized directional property optimization resolves the contradiction between thin structure and heating efficiency.
Solution Approach 2:
The invention changes the thermal conductivity parameters of the heat equalizing member by using materials or structures with anisotropic thermal properties. By controlling the thermal conductivity in different directions (higher axially, lower radially), it achieves both thin structure and efficient heating without energy loss.
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
This arrangement efficiently heats the roller surface by reducing radial heat loss and improving temperature distribution in both axial and circumferential directions, stabilizing yarn quality in spun yarn drawing devices.
Implementation Method 1
thermal conductivity in an axial direction of the heat equalizing member being higher than thermal conductivity of at least the inner circumferential surface of the heating target portion
Implementation Method 2
thermal conductivity in a radial direction being lower than thermal conductivity in the axial direction
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A roller surface is efficiently heated with an arrangement provided with a heat equalizing member. A heating roller 30 is arranged so that an outer cylindrical part 33 of a roller main body 31 is heated. The heating roller 30 is formed to be cylindrical and to be in contact with the inner circumferential surface of the outer cylindrical part 33, and includes a heat equalizing member 36 in which the thermal conductivity in the axial direction is higher than the thermal conductivity of at least the inner circumferential surface of the outer cylindrical part 33. In the heat equalizing member 36, the thermal conductivity in the radial direction is lower than the thermal conductivity in the axial direction.