Tube Sheet Bead Reinforcement for Heat Exchanger Stability
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Solution Overview
Problem
Existing heat exchangers face durability issues due to mechanical and thermal loads, which are not optimally addressed by current reinforcement elements on the tube sheets, leading to deformation and reduced lifespan.
Innovation Solution
A tube sheet design featuring beads along the edge area and webs, with a U-shaped cross-section and slot-like openings, provides enhanced stability by increasing the contact surface between tubes and the sheet, and incorporating beads that extend from the edge area into the webs, thereby reinforcing the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reinforcement elements are added to the tube sheet, then the stability and durability are improved, but the device complexity increases
Solution Approach 1:
The tube sheet is segmented into multiple functional regions: a flat base area for tube accommodation, a peripheral edge area for cover connection, and connecting webs. This segmentation allows each region to be optimized independently for its specific function while maintaining overall structural integrity and reducing complexity through modular design.
Solution Approach 2:
The invention transitions from a conventional flat tube sheet design to a three-dimensional structure with a U-shaped edge area featuring first and second walls extending in opposite directions. This dimensional change provides additional structural reinforcement and creates multiple surfaces for stress distribution, thereby improving durability without proportionally increasing complexity.
2Stability of the object's composition
If the edge area is designed with U-shaped cross-section and walls, then the connection stability with cover is improved, but the manufacturing complexity increases
Solution Approach 1:
The U-shaped edge structure with its first wall extending toward the cover and second wall extending in the opposite direction is pre-formed as an integral part of the tube sheet. This preliminary structuring provides built-in reinforcement and alignment features that simplify the subsequent assembly process with the cover, reducing the need for additional fastening elements or complex installation procedures.
3Strength
If webs are provided between adjacent openings, then the structural strength is improved, but the weight of the tube sheet increases
Solution Approach 1:
The tube sheet employs a non-uniform design where the base area is thickest for overall structural support, the webs provide localized reinforcement between adjacent openings to prevent deformation, and the edge area with its U-shaped cross-section offers additional strength at the connection points. This localized thickening strategy provides necessary structural strength while minimizing unnecessary material usage and weight.
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
The invention relates to a tube sheet (1, 20, 30) having a circumferential edge region (2, 22) for connection to a lid of a collecting tank and having a base region (31) with openings (3) for receiving tube ends, the base region (31) having webs (4, 21, 33) provided between adjacent openings (3), the webs (4, 21, 33) connecting the portions of the edge regions (2, 22) situated on the opposite longitudinal sides, at least one bead (5, 27) being provided which extends along the edge region (2, 22) and/or from the edge region (2, 22) with a limited extension only into a portion of a web (4, 33).