Interchangeable Shell Assemblies for Continuous Blenders
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Solution Overview
Problem
Existing continuous blenders are not adaptable to different mixing requirements due to fixed zig-zag tube sizes and wear issues in seals and trunnion rims, leading to inefficiencies in throughput and mixing uniformity.
Innovation Solution
A kit with interchangeable shell assemblies of varying lengths and diameters, along with an independent drive unit and intensifier motor, allows for adjustable throughput and mixing speeds, and a cantilevered zig-zag tube design reduces wear and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the zig-zag tube size is increased to handle larger throughput, then the blending capacity is improved, but the adaptability to different mixing requirements deteriorates because the size is fixed and cannot be changed
Solution Approach 1:
The shell assembly is divided into separable components (mixing chamber, zig-zag tube, discharge end) that can be detached and replaced. This allows different sized shell assemblies to be swapped on the same drive unit, enabling both large and small throughput configurations without sacrificing adaptability.
Solution Approach 2:
The system transitions from a fixed configuration to a dynamic, reconfigurable system where shell assemblies can be changed based on mixing requirements. The removable coupling mechanism enables the system to adapt its capacity dynamically rather than being locked into a single size.
2Adaptability or versatility
If the motor speed is adjusted to control throughput, then the flexibility is improved, but the range is still limited by centrifugal forces and shell assembly diameter
Solution Approach 1:
The system allows dynamic change of the shell assembly diameter by removing and replacing different sized assemblies. This provides a broader range of operating conditions than motor speed adjustment alone, as both small and large diameter shells can be used on the same drive unit.
3Reliability
If the seal interface is made tight to prevent leakage, then the sealing effectiveness is improved, but the wear on trunnion rims and casters increases due to non-parallel sealing surfaces
Solution Approach 1:
The shell assembly is designed as a separate, removable component that can be independently replaced when worn. This isolates the wear problem to the shell assembly rather than the permanent mounting structure, extending the service life of the drive unit's trunnion rims and casters.
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
Enables quick adaptation to different mixing formulations and real-time adjustments, maintaining formulation consistency while reducing product leakage and wear on components.
Implementation Method 1
As the zig-zag tube was rotated, the peaks and valleys were inverted. As the first V-shaped section was rotated and inverted, the materials fell onto the inverted vertex
Implementation Method 2
An additional trunnion rim was coupled to a motor, typically by a chain drive. When the motor was operated, the chain drive caused the shell assembly to rotate about its longitudinal axis.
Data Source
AI summary
The present invention provides a continuous blender having a drive unit assembly with a shell assembly mounting assembly and a shell assembly structured to be removably coupled to the shell assembly mounting assembly by one or more clamps. The drive unit assembly may be coupled to shell assemblies having different lengths and diameters. Thus, by changing the shell assembly coupled to the drive unit assembly, the output of the continuous blender may be dramatically changed.