Thermally Conductive Gasket for X-ray Tube Anode Heat Transfer
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Solution Overview
Problem
Inefficient heat transfer between the anode and the rotary mechanism in X-ray tubes leads to overheating, limiting the electron beam flux and reducing the useful life of the tube.
Innovation Solution
A thermally conductive, deformable metallic gasket is placed between the anode and the bearing sleeve to enhance heat conduction, along with a particle trap to mitigate particle migration and maintain a vacuum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional X-ray tube operates with standard heat transfer components, then the tube can generate X-ray radiation, but the heat transfer from the anode to the shaft is inefficient causing overheating and limiting continuous operation
Solution Approach 1:
A thermally conductive gasket is introduced as an intermediary component between the anode and the rotary bearing sleeve. This gasket serves as a heat transfer mediator, conducting thermal energy from the anode through the bearing sleeve to the shaft, thereby improving heat transfer efficiency and enabling continuous operation without excessive temperature buildup.
Solution Approach 2:
The rotary bearing assembly utilizes composite construction with a thermally conductive gasket material that combines thermal conductivity with mechanical sealing properties. This composite approach allows the system to simultaneously achieve effective heat transfer and reliable mechanical function, resolving the contradiction between temperature management and operational reliability.
2Productivity
If the electron beam flux is increased to improve X-ray generation, then more radiation is produced, but the heat generated at the anode increases and limits the maximum flux suitable for use
Solution Approach 1:
The thermally conductive gasket acts as an intermediary heat transfer pathway, allowing higher electron beam flux to be sustained by efficiently conducting the increased thermal load from the anode through the bearing sleeve to the shaft, thereby decoupling the relationship between flux increase and temperature buildup.
3Reliability
If heat transfer to the shaft is improved to enable continuous operation, then overheating is prevented, but additional components and complexity are introduced into the X-ray tube structure
Solution Approach 1:
The thermally conductive gasket performs multiple functions simultaneously: it provides thermal conduction from the anode to the shaft, maintains the vacuum seal in the rotary joint, and supports the mechanical structure. This multi-functionality allows continuous operation to be achieved without proportionally increasing device complexity, as a single component addresses multiple requirements.
4Temperature
If a thermally conductive gasket is added to improve heat transfer, then heat conduction is enhanced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The gasket serves as a simple intermediary component that can be inserted between the anode and bearing sleeve without requiring complex assembly procedures. Its deformable nature allows it to conform to the mating surfaces, facilitating straightforward installation while providing effective thermal conduction, thus minimizing the increase in manufacturing difficulty.
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 allows for continuous operation of the X-ray tube by effectively dispersing thermal energy, maintaining suitable X-ray flux, and extending the tube's operational life by preventing overheating and particle-induced issues.
Implementation Method 1
a thermally conductive, deformable metallic gasket disposed between the target and the bearing sleeve and configured to conduct heat between the target and the bearing sleeve in operation
Data Source
AI summary
The embodiments disclosed herein relate to the thermal regulation of components within an X-ray tube, and more specifically to heat transfer between the anode and the rotary mechanism to which the anode is attached. For example, in one embodiment, an X-ray tube is provided. The X-ray tube generally includes a fixed shaft, a rotating bearing sleeve disposed about the fixed shaft and configured to rotate with respect to the fixed shaft via a rotary bearing, an electron beam target disposed about the bearing sleeve and configured to rotate with the bearing sleeve, and a thermally conductive, deformable metallic gasket disposed between the target and the bearing sleeve and configured to conduct heat between the target and the bearing sleeve in operation.