Flat Emitter Torsioned Connection Legs Thermal Stress
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Solution Overview
Problem
Flat emitters in X-ray tubes experience mechanical stress and reduced service life due to thermal expansion, leading to geometric deformation and alternating fatigue, which degrades image quality and shortens the emitter's lifespan, and existing connection designs either lack flexibility or result in excessive rigidity.
Innovation Solution
A flat emitter design featuring band-type connection legs torsioned at a definable angle along the longitudinal axis, reducing rigidity and allowing for thermal expansion absorption, thereby minimizing mechanical stress and fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If band-type connection legs are used to mount the flat emitter, then the emitter can be rigidly fixed in the cathode head, but the inherent elasticity of the connection legs causes limited suspension flexibility and risk of torsion during installation
Solution Approach 1:
The connection legs are torsioned at a definable angle along their longitudinal axis, changing the geometric parameter of the connection structure. This torsion modifies the mechanical properties to provide both rigid fixation and controlled flexibility, allowing the emitter to be securely mounted while accommodating thermal expansion and reducing torsion risk during installation.
2Stability of the object's composition
If the connection legs are made rigid to ensure stable mounting, then the emitter is securely fixed, but excessive rigidity prevents absorption of thermal expansion, leading to mechanical stress and fatigue
Solution Approach 1:
The connection legs are torsioned at a definable angle along their longitudinal axis, changing the geometric parameter of the connection structure. This torsion modifies the mechanical properties to provide both rigid fixation and controlled flexibility, allowing the emitter to be securely mounted while accommodating thermal expansion and reducing torsion risk during installation.
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 design extends the service life of the flat emitter by reducing mechanical load and maintaining high electron emission efficiency, preventing cracks and maintaining image quality over a longer period.
Implementation Method 1
the flat emitter includes an emitter surface (2) which emits electrons when a filament voltage is applied
Implementation Method 2
The temperatures occurring during operation lead in the case of the flat emitter to relatively strong linear expansions which because of stresses result in elastic and/or plastic deformations
Implementation Method 3
Because of a certain inherent elasticity of the connection legs, there is a limited elasticity of the suspension of the flat emitter
Data Source
AI summary
A flat emitter, in an embodiment, includes an emitter surface to emit electrons when a filament current is applied; a first end region including at least one first connection leg; and a second end region including at least one second connection leg. According to an embodiment, at least one connection leg is embodied as a band-type connection leg and is torsioned at an angle in a longitudinal axis. According to an embodiment, the first connection leg and the second connection leg are embodied as band-type connection legs and in each case are torsioned at a definable angle in a longitudinal axis. As a result, a simply constructed flat emitter in terms of design is achieved, with a longer service life and a high level of electron emission.