Electromagnetic Rotary Drive With Openable Stator Assembly
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Solution Overview
Problem
Existing electromagnetic rotary drives for biotechnological and pharmaceutical processes require complex assembly of single-use components with reusable devices, which can compromise sterility and are time-consuming, especially when connecting tubes to stator feedthroughs.
Innovation Solution
Designing a stator with openable parts that allow the connecting tube to be inserted before assembly, enabling a pre-assembled single-use device to be inserted as a unit into the reusable device, with a jointed connection and mechanical fixing for easy assembly and disassembly, maintaining sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stator is designed as a single rigid piece, then the structural strength and sealing are improved, but the assembly complexity and time increase significantly when connecting single-use devices
Solution Approach 1:
The stator is divided into multiple separable parts (first stator part and second stator part) that can be assembled together to form the complete stator. This segmentation allows the single-use device to be pre-assembled and sterilized separately, then easily inserted into the reusable device without complex threading operations, resolving the contradiction between assembly simplicity and structural integrity.
2Reliability
If tube connections are made before assembly, then sterilization effectiveness is improved, but the risk of contamination during assembly increases
Solution Approach 1:
The single-use device including tube connections is pre-assembled and sterilized before being inserted into the reusable device. The openable stator design enables this pre-assembly to be done outside the sterile field, allowing complete sterilization of all components including tubes and connectors, thereby maintaining sterility while enabling simple subsequent assembly.
3Reliability
If multiple assembly steps are required for tube insertion, then the sealing reliability is improved, but the assembly time and complexity increase
Solution Approach 1:
The tube connection features (inlet/outlet openings) are integrated directly into the single-use device components themselves rather than requiring separate connection steps. The openable stator design combines the tube insertion and device assembly into a single simultaneous operation, eliminating multiple sequential steps while maintaining reliable sealing through the integrated design.
4Reliability
If the stator remains closed during assembly, then the sterility protection is improved, but the ease of operation for inserting single-use devices deteriorates
Solution Approach 1:
The stator is designed with dynamic openable features (first and second stator parts that can be separated) allowing it to transition between closed (sterile) and open (assembly-friendly) states. During assembly, the stator parts are separated to facilitate easy insertion of the pre-assembled single-use device, then closed to maintain sterility and provide structural integrity, resolving the contradiction between sterility protection and operational ease.
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
Facilitates simple and sterile assembly of single-use devices with reusable components, reducing the risk of contamination and minimizing assembly steps, allowing for complete sterilization of the pre-assembled unit.
Implementation Method 1
the stator comprises a plurality of windings for generating an electromagnetic rotating field for driving the rotor
Implementation Method 2
the rotor can be magnetically levitated without contact with respect to the stator in the operating state
Data Source
AI summary
An electromagnetic rotary drive includes a single-use device for single use and a reusable device for multiple use. The single-use device includes a rotor housing with a rotor, a connecting tube for a fluid, and a single-use component. The rotor housing has an inlet and an outlet, and the rotor is provided in the rotor housing for rotation about a desired axis of rotation defining an axial direction. The rotor can be magnetically driven without contact, and the connecting tube connects the inlet or the outlet of the rotor housing to the single-use component such that in the operating state the fluid flows through the connecting tube. The reusable device includes a stator, by which the rotor is magnetically driven without contact for rotation about the desired axis of rotation in the operating state.