Swing Rotor Bucket Dynamics for Centrifugal Load Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Centrifugal separators using swing rotors face limitations in maximum rotating speed due to metal fatigue and unstable bucket seating, leading to reduced operating life and potential cap assembly fastening issues under high centrifugal loads.
Innovation Solution
A centrifugal separator design with a swing rotor that includes a rotor body with partial pin insert grooves and a bucket with a contact surface that can move in the longitudinal direction and rotate about its central axis, allowing for increased flexibility and distribution of contact points with the rotor body, thereby enhancing stability and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the swing rotor is rotated at high speed, then the centrifugal separation efficiency is improved, but metal fatigue occurs and the operating life is reduced
Solution Approach 1:
The bucket is designed with a swing mechanism that allows it to dynamically adjust its position and orientation during rotation. The bucket can swing between vertical and horizontal positions and rotate about its longitudinal axis, distributing the centrifugal load across multiple contact points with the rotor body rather than concentrating it at a single point, thereby reducing metal fatigue and extending operating life while maintaining high-speed operation capability
2Device complexity
If the bucket is fixed in position, then the structure is simple, but the contact point is concentrated and leads to premature wear
Solution Approach 1:
The bucket incorporates a swing mechanism with a swing shaft that allows the bucket to rotate about its longitudinal axis and change its angular position relative to the rotor body. This dynamic capability distributes the contact pressure across different locations on the rotor body surface, preventing concentrated wear at a single point while adding only moderate structural complexity through the swing shaft and associated mounting features
3Ease of manufacture
If the bucket is made rigid, then the manufacturing is easier, but it cannot adapt to high centrifugal loads and may unfasten
Solution Approach 1:
The bucket design incorporates a swing mechanism that allows the bucket to dynamically adjust its orientation and position during high-speed rotation. The swing shaft enables the bucket to rotate about its longitudinal axis and adapt its contact points with the rotor body, distributing centrifugal forces across multiple locations. This dynamic adaptability prevents stress concentration that would otherwise cause the cap assembly to unfasten, while the overall rigid construction maintains ease of manufacture
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 enables smooth operation at high speeds, prevents metal fatigue, and extends the operating life of the bucket by distributing the centrifugal load and reducing the risk of cap assembly unfastening, while maintaining efficient sealing and sample containment.
Implementation Method 1
When the rotation is stopped, the hook portion is engaged with the arm to attach the bucket to the swing rotor. Further, when the swing rotor is rotated, the buckets are swung by a centrifugal force on the pins, in the directions shown by an arrow mark 141 as swing shafts
Data Source
AI summary
A centrifugal separator comprising: a driving portion; and a swing rotor including, a rotor body, a through-hole passing through the rotor body, pin insert grooves which are provided parallel to the through-hole so as to oppose each other and only partially penetrate the rotor body, and a bucket including, a bucket body that has a contact surface which is configured to contact the rotor body during centrifugal separation, and a cap assembly that seals the bucket body and has a swing shaft extending in a direction perpendicular to an longitudinal direction of the bucket, wherein the swing rotor is rotated when the bucket is inserted into the through-hole, to swing the bucket, and the swing shaft can be moved in the longitudinal direction of the bucket relative to the bucket body and rotated about a longitudinal central axis of the bucket.