Single-pole X-ray Emitter Compact Design Thermal Drift
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Solution Overview
Problem
Existing x-ray emitters have a large installation space due to the radial arrangement of the rotor shaft and rotating anode, leading to increased size and potential thermal drift affecting focal spot stability, which compromises imaging quality.
Innovation Solution
A single-pole x-ray emitter design with a ring-shaped fixing of the rotor shaft to the anode-side housing wall, incorporating a temperature compensation element in the anode tube, and an electrically insulated vacuum housing, allowing the rotating anode to be positioned closer to the vacuum housing, reducing thermal drift and installation size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rotor shaft and rotating anode are arranged radially one above the other without geometric separation, then the structural arrangement is simplified, but the installation space becomes large
Solution Approach 1:
The patent transitions from a radial arrangement to an axial arrangement where the stationary part of the rotor shaft is joined to the anode-side housing wall. This dimensional reconfiguration allows the rotating anode to be positioned closer to the vacuum housing, reducing the installation space while maintaining structural integrity.
2Stability of the object's composition
If the rotating anode is positioned far from the anode-side housing wall, then there is sufficient space for thermal expansion, but the installation space becomes large
Solution Approach 1:
The patent incorporates a temperature compensation element in the anode tube that actively compensates for thermal expansion of the rotor shaft. This allows the rotating anode to be positioned closer to the vacuum housing while maintaining stable focal spot position despite thermal effects during operation.
3Volume of stationary object
If the rotor shaft is joined to the anode-side housing wall via ring-shaped fixing, then the rotating anode can be positioned closer to the vacuum housing, but the manufacturing complexity increases
Solution Approach 1:
The rotor shaft is divided into a stationary part joined to the housing wall and a rotating part that rotates with the anode. The ring-shaped fixing connects these segments to the housing wall, enabling compact positioning while maintaining manufacturability through modular assembly.
4Reliability
If the vacuum housing is electrically insulated from the emitter housing, then electrical safety is improved, but the device complexity increases
Solution Approach 1:
The patent introduces an insulating medium (such as insulating oil or gas) as an intermediary between the vacuum housing and emitter housing. This provides electrical insulation and safety while maintaining a relatively simple structural configuration.
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 achieves a compact x-ray emitter with improved imaging characteristics and consistent focal spot position, ensuring high-quality x-ray recordings throughout operation by minimizing thermal drift and reducing installation size.
Implementation Method 1
the anode tube includes a temperature compensation element, and a bearing of a rotating part of the rotor shaft is arranged within the anode tube. Longitudinal expansions of the rotor shaft due to thermal conditions are compensated by the temperature compensation element of the anode tube.
Data Source
AI summary
A single-pole x-ray emitter includes an emitter housing, in which an x-ray tube with a vacuum housing and a drive motor are arranged. A cathode that generates an electron beam, and a rotating anode that is struck by the electron beam along a focal path are arranged in the vacuum housing. The vacuum housing includes a drive-side housing wall and an anode-side housing wall, and the rotating anode is held in a torsionally rigid manner on an anode tube that is rotatably mounted on a stationary part of a rotor shaft that is coupled to the drive motor. The stationary part of the rotor shaft is joined to the anode-side housing wall of the vacuum housing via a ring-shaped fixing. The anode tube incorporates a temperature compensation element. The focal path is arranged on a side of the rotating anode that faces away from the anode-side housing wall.