CT Rotator Stiffness via Closed Reinforcement Ring
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Solution Overview
Problem
CT machine rotators face issues with deformation and reduced stiffness during high-speed rotation, leading to distortion of the X-ray path and accuracy loss due to fatigue degradation and centrifugal forces, which complicates the structure and increases manufacturing costs.
Innovation Solution
A rotator design with a rotating base, load-carrying part, and circumferentially closed reinforcement structure that resists centrifugal forces and maintains structural integrity, ensuring accurate and reliable scanning by distributing the load-carrying part on the external peripheral surface and connecting it with a reinforcement that constrains the load-carrying part to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the rotator uses a conventional open structure to reduce weight, then the weight is reduced, but the stiffness and resistance to centrifugal force during high-speed rotation deteriorates, causing deformation
Solution Approach 1:
The rotator is divided into multiple functional components: a rotating base, a load-carrying part for mounting scanning components, and a circumferentially closed reinforcement structure. This segmentation allows each part to be optimized independently - the open structure reduces weight while the closed reinforcement ring provides the necessary stiffness and centrifugal force resistance.
Solution Approach 2:
The reinforcement structure is designed as a circumferentially closed ring that extends in the axial direction, adding a three-dimensional dimensional constraint to the otherwise planar open structure. This dimensional addition provides torsional stiffness and resistance to centrifugal forces without significantly increasing radial weight.
2Ease of manufacture
If the rotator structure is simplified to reduce manufacturing cost, then manufacturing cost is reduced, but the ability to resist deformation during high-speed rotation deteriorates
Solution Approach 1:
The rotator is segmented into a rotating base, load-carrying part, and reinforcement structure, allowing each component to be manufactured separately using standard processes and then assembled. This segmentation simplifies manufacturing while the closed-loop reinforcement geometry inherently provides the necessary structural strength.
Solution Approach 2:
The rotator employs composite construction combining the open rotating base structure with the closed reinforcement ring, creating a hybrid structure that achieves both manufacturing simplicity and high performance. The combination of open and closed structural elements provides optimal balance between ease of manufacture and deformation resistance.
3Stability of the object's composition
If the load-carrying part is distributed on the external peripheral surface to maintain structural integrity, then structural integrity is maintained, but the device complexity increases
Solution Approach 1:
The load-carrying part is segmented and distributed at strategic locations on the external peripheral surface rather than creating a complex continuous structure. This segmented approach maintains structural integrity by positioning mounting surfaces where they are most effective while keeping the overall design simple and modular.
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 effectively suppresses deformation, enhances the rotator's stiffness, and simplifies the structure while reducing weight, ensuring accurate data collection and high-speed rotational scanning without increasing manufacturing complexity or costs.
Implementation Method 1
maintains structural integrity, ensuring accurate and reliable scanning by distributing the load-carrying part on the external peripheral surface and connecting it with a reinforcement that constrains the load-carrying part to prevent deformation
Data Source
AI summary
A Computed Tomography (CT) machine and a rotator thereof are provided. The rotator includes a rotating base with a scanning hole, a reinforcement with an axial through hole, and a load-carrying part for carrying scanning parts. The reinforcement is of a circumferentially closed structure. The axial through hole communicates with the scanning hole in a way that the reinforcement does not axially block the scanning hole. The load-carrying part is mounted on an external peripheral surface of the rotating base, and an axial end of the load-carrying part is connected with the reinforcement.