Propeller Mixer Coupling for Modular Shaft Replacement
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Solution Overview
Problem
Existing mixers/stirrers, particularly fast stirrers, face challenges in maintenance and adaptation due to non-standard shaft lengths and cost-effectiveness, making repairs and changes complex and costly.
Innovation Solution
A mixing/stirring device with a removable connection element between the motor and stirring shaft, allowing variable shaft lengths and easy coupling/decoupling, featuring a truncated conical proximal end, annular portions, and a flange with screws for secure attachment, enabling independent replacement of motor and shaft components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the stirrer is designed with a fixed non-standard shaft length to fit specific vessel requirements, then the mixing performance for specific applications is optimized, but the adaptability to different vessel types and the ease of maintenance are reduced
Solution Approach 1:
The stirrer shaft is divided into modular segments with standardized connection interfaces. The shaft can be assembled or disassembled in the field to adjust the overall length, allowing the same motor and impeller to be adapted to different vessel depths and types without custom manufacturing for each application.
Solution Approach 2:
The stirrer design incorporates universal connection standards that allow the motor and impeller assembly to be used across multiple vessel types and sizes. The standardized shaft connections enable a single motor-impeller unit to serve multiple functions in different mixing applications, eliminating the need for custom non-standard shaft lengths for each vessel type.
2Reliability
If the entire stirrer is replaced when the motor or shaft fails, then reliability is restored, but the cost and complexity of maintenance increase significantly
Solution Approach 1:
The stirrer is designed as modular components (motor, shaft sections, impeller) with standardized connections. When maintenance is needed, only the faulty component or assembly needs to be replaced or repaired, not the entire stirrer. This segmentation enables cost-effective maintenance by allowing selective replacement of motors, shafts, or impellers independently.
Solution Approach 2:
The standardized connection elements allow for easy disassembly and recovery of functional components. When a motor or shaft fails, the working components can be detached and reused on a replacement part, reducing waste and maintenance costs. The modular design enables recovery and reuse of expensive components like motors and impellers while only replacing the failed element.
3Manufacturing precision
If custom non-standard shaft lengths are manufactured for each application, then the mixing performance for specific vessels is optimized, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of manufacturing custom-length shafts for each application, the shaft is divided into standardized modular sections that can be assembled in different combinations. This allows application-specific length optimization through simple assembly rather than complex custom manufacturing, reducing production complexity while maintaining precision fit for different vessel types.
Solution Approach 2:
The shaft length parameter is made adjustable through modular assembly rather than fixed during manufacturing. Standardized connection elements with controlled tolerances allow precise length adjustments for different applications while using the same standardized components, eliminating the need for custom manufacturing for each length requirement.
Data Source
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AI summary
The present invention relates to an apparatus for mixing liquids or semiliquids, in particular to a so called fast stirrer. In particular, the invention relates to a device for mixing/stirring (1) a liquid or semiliquid contained in a vessel/reactor, comprising a motor (2) having a shaft (2a) for transmitting a rotary motion, an stirring shaft (3) having a proximal end (3a) and a distal end (3b), an impeller (4) being associated with said distal end (3b), characterized in that the device (1) comprises a removable connection element (5) between said motor (2) and said stirring shaft (3) .