Anode Disk Heat Dissipation via Anisotropic CFC Composite
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Solution Overview
Problem
X-ray tubes face limitations in heat dissipation at the focal spot area due to mechanical stresses and inefficient thermal management, which affects their power rating and structural integrity.
Innovation Solution
An anode disk element made of composite material with anisotropic thermal conductivity, incorporating refractory metal fibers or metal infusion for enhanced heat dissipation, particularly in the direction of reduced thermal conductivity, to manage heat effectively and withstand mechanical stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a rotating anode element is used to distribute heat over a larger area, then the power rating of the X-ray generating device is increased, but significant mechanical stresses occur due to substantial rotations per minute
Solution Approach 1:
The anode disk element is constructed as a composite material comprising a carbon fiber reinforced carbon matrix composite (CFC). This composite structure provides both the mechanical strength to withstand high rotational speeds and the thermal conductivity to dissipate heat effectively, resolving the contradiction between increasing power rating and managing mechanical stresses.
2Temperature
If refractory metal is used for the anode element to provide high temperature resistance and thermal conductivity, then heat dissipation is improved, but thermal mechanical stresses increase during X-ray generation
Solution Approach 1:
The invention changes the material parameters by using CFC composite material with specific thermal conductivity properties. The material has high thermal conductivity in the plane of the disk for heat dissipation while maintaining low thermal expansion and high mechanical strength, thereby reducing thermal mechanical stresses during operation.
3Temperature
If the thermal conductivity of the anode disk element is increased to improve heat dissipation, then the temperature management is improved, but the structural integrity may be compromised
Solution Approach 1:
The CFC composite material provides anisotropic thermal conductivity with high values in the plane of the disk for effective heat dissipation while maintaining exceptional mechanical strength and structural integrity. The carbon fiber reinforcement within the carbon matrix achieves both thermal management and structural requirements simultaneously.
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 improved heat dissipation and structural integrity, allowing for increased power rating and efficient thermal management of X-ray tubes, reducing mechanical and thermal stresses, and eliminating the need for additional heat dissipation methods like chemical vapor deposition.
Implementation Method 1
The heat dissipating element is adapted for heat dissipation from the focal track in the direction of reduced thermal conductivity of the anode disk element
Implementation Method 2
The anode disk element may comprise a composite material and/or a material comprising an anisotropic thermal conductivity
Data Source
AI summary
An anode disk element for the generation of X-rays that provides improved dissipation of heat from a focal track includes an anisotropic thermal conductivity. The anode disk element includes a focal track and at least one heat dissipating element. The anode disk element is rotatable about a rotational axis with the focal track being rotationally symmetrical to the rotational axis. The at least one heat dissipating element is configured for heat dissipation from the focal track in the direction of reduced thermal conductivity of the anode disk element.