Centrifugal Pump Air-Gap Sleeve With Integrated Conductor Tracks
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Solution Overview
Problem
Existing centrifugal pumps face challenges in efficiently and cost-effectively bundling and connecting stator winding wire strands without additional components, leading to complex and expensive manufacturing and assembly processes.
Innovation Solution
Conductor tracks are integrated onto the collar surface facing away from the pump impeller, allowing for direct soldering of wire strands and combining electrical and sealing functions in a single component, utilizing MID technology for simplified manufacturing and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire strands are fastened to an additional circuit board, then electrical connection is achieved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent merges the circuit board function with the can structure by integrating conductor tracks directly into the can's collar surface. This eliminates the separate circuit board component while maintaining all necessary electrical connection functions, thereby reducing device complexity without compromising connection reliability.
Solution Approach 2:
The can structure is given multiple functions: it serves as both the structural housing and the electrical connection carrier. By forming conductor tracks on the collar surface, the can becomes a multi-functional component that provides both mechanical support and electrical wiring, eliminating the need for a dedicated circuit board.
2Reliability
If additional circuit board is used for wiring, then electrical connection is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the wiring function with the can manufacturing process by integrating conductor tracks into the collar surface. This eliminates the need for a separate circuit board, reducing the number of components and assembly steps, thereby lowering manufacturing costs while maintaining reliable wire strand connections.
Solution Approach 2:
The can structure performs multiple functions including housing, sealing, and electrical wiring. By forming conductor tracks on the collar surface during or after can manufacturing, the patent eliminates the need for additional circuit board materials and assembly operations, reducing overall manufacturing cost.
3Ease of operation
If conductor tracks are applied using MID technology, then assembly is simplified, but manufacturing process complexity increases
Solution Approach 1:
The conductor tracks are pre-formed on the collar surface during the can manufacturing process or in a preliminary step before final assembly. This preliminary action integrates the wiring structure into the can itself, allowing for simplified final assembly where wire strands can be directly soldered to the pre-positioned tracks without complex routing or additional mounting steps.
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
This approach simplifies the design and assembly, reduces costs, enhances reliability, and integrates electrical components into a single component, while maintaining insulating functions, even in compact pump designs.
Implementation Method 1
the conductor tracks are applied to the collar surface using MID technology, so that production and assembly are further simplified
Implementation Method 2
on which the exiting ends of the wire strands of the stator winding are contacted, in particular soldered
Data Source
Figure 1
Figure 2
AI summary
The pump has a separating can (7) that is made from plastic and is arranged between a rotor (6) and an electrical stator winding (8) comprising wire strands (9). A flange-shaped collar (10) is formed at a side of the can (7) and projects coaxially outward, where the side faces a pump impeller (5). Conductors are fastened on a surface (10a) of a collar, where the collar surface is turned away from the pump impeller. Discharge ends of the wire strands of the stator winding are soldered to the conductors.