Mixing Head Identification Device for Sterile Biopharm Applications
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Solution Overview
Problem
Existing agitator heads in biopharmaceutical and food industries lack clear identification features due to surface treatments like electropolishing, leading to difficulties in distinguishing and assigning components during maintenance, which increases the risk of mix-ups and contamination.
Innovation Solution
Incorporating an identification device within a through-opening between the outer and inner surfaces of the bearing hub, sealed by an agitator blade and bearing bush, allowing for RFID-based identification without compromising surface quality or sterility, and enabling automated identification during dismantling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface treatment like electropolishing is applied to the agitator head, then sterility and surface quality are improved, but identification capability deteriorates
Solution Approach 1:
The identification device is nested within the bearing hub structure, specifically positioned in a through-opening that is sealed by the bearing bush on the inner side and the agitator blade on the outer side. This nesting approach allows the identification device to be embedded within the existing components without altering the external surface treatment, thus maintaining sterility while providing identification capability.
2Loss of information
If marking methods like etching or stamped markings are applied to the agitator head, then identification capability is improved, but hygiene and surface quality deteriorate
Solution Approach 1:
The identification function is extracted from the surface of the agitator head and relocated to a separate identification device that is positioned within the bearing hub. This extraction allows the agitator head surface to remain untouched and maintain its hygiene properties, while the identification capability is provided by the separate device embedded in the bearing hub structure.
3Ease of repair
If components are dismantled for maintenance, then access to bearing components is improved, but risk of mix-up increases
Solution Approach 1:
The identification device provides immediate feedback information about the specific agitator head through machine-readable identification. This feedback mechanism allows operators to verify component identity during dismantling and reassembly operations, preventing mix-ups and ensuring correct component assignment even when components are separated for maintenance.
4Loss of information
If an identification device is added to the agitator head, then identification capability is improved, but device complexity increases
Solution Approach 1:
The bearing hub structure serves multiple functions: it provides mechanical support for the agitator blade, houses the bearing bush for rotational movement, and contains the through-opening for the identification device. By utilizing the existing bearing hub structure to accommodate the identification device rather than adding a separate mounting structure, the overall device complexity is minimized while still achieving identification capability.
Data Source
Figure 1
AI summary
A mixing head (1) comprising a bearing hub (2), a bearing bushing (3), at least one mixing vane (6) and a coupling section (7), wherein the bearing hub (2) has an outer surface (4) and an inner surface (5), and the bearing bushing (3) is positively fitted into the bearing hub (2), adjacent to the inner surface (5), wherein the mixing vane (6) is connected to the coupling section (7) and the outer surface (4) of the bearing hub (2), wherein the mixing head (1) has an identification device and the bearing hub (2) has a through-opening (10) between the outer surface (4) and the inner surface (5), the identification device is positioned in the through-opening (10), and the mixing vane (6) closes the through-opening (10) on the outer surface (4).