Triangular Roller Support for Low-Vibration Rotating Packed Beds
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Solution Overview
Problem
Conventional RPB units face mechanical instability and reliability issues due to cantilever-type rotor assembly support, which is unsupported at the non-drive end, leading to potential failure under heavy process loads.
Innovation Solution
A roller assembly with at least three rollers arranged in a triangular pitch configuration, each coated with chemical-resistant material, supports the rotating shaft, and includes self-lubricating or sealed bearings for smooth operation and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a cantilever-type support arrangement is used for the rotor assembly, then the device complexity is reduced, but the reliability deteriorates due to mechanical instability under heavy process loads
Solution Approach 1:
The support system is segmented into multiple independent roller elements (at least three rollers) arranged in a triangular pitch configuration, replacing the single cantilever support. Each roller independently supports the rotating shaft, distributing the mechanical load and enhancing stability without significantly increasing overall system complexity
Solution Approach 2:
The rollers are provided with chemical-resistant outer layers or coatings at specific locations where they contact the rotating shaft, creating localized areas of enhanced chemical resistance and wear resistance. This allows the support system to withstand harsh chemical environments while maintaining mechanical stability
2Device complexity
If the rotor assembly is supported only at the drive end, then the device complexity is reduced, but the reliability worsens due to unsupported non-drive end
Solution Approach 1:
The support function is segmented across multiple rollers positioned at different locations around the rotating shaft, providing distributed support along the shaft length rather than concentrated support at a single location, thereby improving reliability without complex structures
Solution Approach 2:
The support system transitions from one-dimensional cantilever support to three-dimensional triangular pitch arrangement of rollers, providing support in multiple spatial dimensions and enhancing stability against radial and axial loads
3Ease of manufacture
If conventional support systems are used, then the ease of manufacture is improved, but the reliability deteriorates due to inability to accommodate central axis arrangements
Solution Approach 1:
Instead of passing the support shaft through the central axis of the rotor (conventional approach), the rollers are positioned externally around the central axis, supporting the rotating shaft from the outside. This inversion allows the central axis to remain clear for liquid distributor and gas outlet assemblies while providing robust external support
Data Source
AI summary
The present disclosure relates to a Rotating packed bed (RPB) (101) wherein the rotor assembly (106) is supported on a roller assembly (100) for improved mechanical integrity and low vibrations and a method (200) thereof. The roller assembly (100) includes at least three rollers (102) distributes a load that is disposed in a rotating shaft (103) of the rotor assembly (106). The at least three rollers (102) are adapted to configure in a pre-determined configuration i.e. in triangular pitch. The outer layer (104) is disposed an exterior surface (104-1) of each of the at least three rollers (102) respectively. Further, the rotating shaft (103) is positioned at the center of the first (102-1), the second (102-2), and the third (102-3) rollers, such that the rotating shaft (103) comes in contact with the outer layer (104) of the three rollers (102-1), (102-2), (102-3) thereby provide support to RPB (101).