Pump Housing Flange Rib Structure for Defect-Free Welding
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Solution Overview
Problem
The existing pump devices face issues with defective welding at the flange portions due to deformation during the welding process, leading to insufficient contact between the first and second flange portions, which can result in gaps and weakened welds.
Innovation Solution
The pump device incorporates reinforcement ribs on the second housing flange portion to connect it with the side wall, preventing deformation during welding and ensuring proper contact between the first and second flange portions, thereby reducing the likelihood of defective welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first housing and second housing are fixed to each other by welding, then the pump chamber is formed and sealed, but the flange portions may be deformed by pressurization during welding, leading to defective welding
Solution Approach 1:
The reinforcement ribs are provided in advance on the second flange portion before welding occurs. These ribs pre-reinforce the structure to resist deformation during the subsequent welding pressurization process, preventing the flange from deforming before the weld can properly form
Solution Approach 2:
The second flange portion is segmented by providing multiple reinforcement ribs at different positions. This segmentation creates multiple support points that distribute and resist the pressurization forces during welding, preventing overall deformation of the flange structure
2Manufacturing precision
If pressurization is applied to the second flange portion during welding, then the welding places are forced together, but the outer peripheral end portion deforms into a shape inclined toward the first flange portion, causing insufficient welding
Solution Approach 1:
The reinforcement ribs are pre-installed on the second flange portion before welding to maintain its shape during pressurization. This preliminary structural reinforcement prevents the flange from inclining toward the first flange portion when pressure is applied, ensuring the welding surfaces remain properly aligned
Solution Approach 2:
The reinforcement ribs are strategically positioned at specific locations on the second flange portion where deformation is most likely to occur. This localized reinforcement provides targeted support to maintain the flange's shape and prevent inclination during the welding pressurization process
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 reinforcement ribs effectively prevent deformation of the flange portions, ensuring robust and reliable welding, minimizing the occurrence of defective welds and maintaining the structural integrity of the pump chamber.
Implementation Method 1
the second housing is provided with a plurality of first reinforcement ribs respectively provided at a plurality of positions in a circumferential direction, each of the plurality of first reinforcement ribs connecting the side wall portion and the second flange portion
Data Source
AI summary
In a pump device, a pump chamber is formed by welding a first flange portion of a first housing sealing a stator and a second flange portion of a second housing put on the first housing from one side in an axial direction. Since the second housing is provided with first reinforcement ribs each connecting the second flange portion and a side wall portion, the second flange portion is less likely to be deformed even when a pressurizing force in the axial direction is applied to the second flange portion during welding. As a result, it is possible to prevent a first welding portion provided on the first flange portion and a second welding portion provided on the second flange portion from being welded in a state of being unable to sufficiently contact each other, and thus there is little possibility that defective welding occurs.