Retaining body, heating device and method
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Solution Overview
Problem
Existing retaining bodies for heating elements in heating devices face challenges with frequent temperature changes, leading to material fatigue and reduced holding force, and require time-consuming and cost-intensive diameter changes for assembly, which can result in malfunctions and reduced service life.
Innovation Solution
A retaining body design featuring an outer and inner part with polygon profiles that form an elastic connection through relative rotation, creating a press fit and mechanical tension to securely hold heating elements without the need for additional clamping, allowing for easier assembly and improved heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outer part diameter is increased by heating and/or applying radial force for mounting, then the retaining body can be assembled, but the mounting process becomes time-consuming and cost-intensive
Solution Approach 1:
The patent changes the geometric parameters of the polygon profiles, specifically designing the inner and outer polygons with different numbers of sides or different side lengths. This parameter difference creates an inherent elastic deformation mechanism during assembly that generates the necessary mounting force without requiring external heating or radial force application, thereby reducing mounting time and cost
2Strength
If the side walls are plastically deformed to clamp the heating element, then the heating element is securely held, but the retaining function deteriorates under frequent temperature changes
Solution Approach 1:
The patent transitions from a static plastic deformation solution to a dynamic elastic deformation solution. The polygon profiles are designed to elastically deform during assembly and maintain this elastic state during operation, allowing the structure to dynamically adapt to temperature changes while maintaining holding force, thus improving reliability under thermal cycling conditions
Solution Approach 2:
The patent employs a nested structure where an inner polygon profile is positioned within an outer polygon profile. The inner polygon's vertices engage with the outer polygon's sides, creating a hierarchical nesting arrangement that distributes stress and maintains retention through elastic interaction between the nested components, preventing complete failure under temperature variations
3Strength
If additional clamping elements are used to secure heating elements, then the holding force is improved, but the device complexity increases
Solution Approach 1:
The patent makes the polygon profiles multi-functional by designing them to simultaneously provide structural support, generate clamping force through elastic deformation, and retain heating elements. This universal design eliminates the need for separate clamping elements, reducing device complexity while maintaining adequate holding force through the integrated elastic mechanism
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 provides a secure and efficient mounting process that maintains contact force during temperature changes, enhances heat transfer, and reduces assembly time and costs, ensuring reliable operation and extended service life of heating devices.
Implementation Method 1
The outer part assembly and the inner part assembly are rotatable relative to one another and dimensioned in such a way that the polygon profiles are elastically deformed by a relative rotation between the inner part assembly and the outer part assembly in such a way that, in the assembled state, a press fit is formed in the region of the heating elements by the induced mechanical tension, in particular by a spring force.
Implementation Method 2
The outer part assembly and the inner part assembly are rotatable relative to one another and dimensioned in such a way that the polygon profiles are elastically deformed by a relative rotation between the inner part assembly and the outer part assembly in such a way that, in the assembled state, a press fit is formed in the region of the heating elements by the induced mechanical tension, in particular by a spring force.
Data Source
AI summary
A retaining body for heating elements, in particular oval and round heating elements, having an outer part assembly and an inner part assembly which is arranged inside the outer part assembly and forms an elastic connection with the outer part assembly under mechanical tension, wherein the outer part assembly and/or the inner part assembly has/have a plurality of receptacles which are arranged distributed in the circumferential direction and in each of which a heating element is arranged, and the outer part assembly and the inner part assembly each comprise a polygon profile with polygon corners and polygon sides which connect the polygon corners. The invention is characterized in that the inner part assembly and the outer part assembly can be rotated relative to one another and are dimensioned in such a way that the polygon profiles are elastically deformed by a relative rotation between the inner part assembly and the outer part assembly in such a way that, in the mounted state, a press fit is formed in the region of the heating elements by the induced mechanical tension.