Comminuting Device Segmented Shafts Screening Flow Resistance
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Solution Overview
Problem
Comminuting devices face high flow resistance issues when trying to achieve fine particle sizes, leading to increased installation space, weight, and production costs, especially when handling liquids with varying solid content.
Innovation Solution
Incorporating a screening device with movable clearing elements and a drive mechanism to prevent large solids from passing through, while maintaining low flow resistance by providing additional liquid paths and ensuring the screening wall remains unobstructed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the distance between comminuting shafts is increased to reduce flow resistance, then flow resistance decreases, but device volume increases
Solution Approach 1:
The comminuting device is divided into multiple comminuting stages with multiple shafts and cutting elements. Each stage handles a portion of the comminution task, allowing for more efficient space utilization and reduced overall device volume while maintaining effective comminution performance without excessive flow resistance.
Solution Approach 2:
Multiple comminuting shafts are arranged concentrically or in nested configurations within the housing. The first comminuting shaft and second comminuting shaft are positioned to optimize space utilization, with cutting elements arranged to achieve effective comminution in a compact volume while maintaining acceptable flow resistance characteristics.
2Object-generated harmful factors
If comminuting cutting elements are increased in size to reduce flow resistance, then flow resistance decreases, but device weight increases
Solution Approach 1:
The comminuting function is segmented across multiple smaller cutting elements distributed on multiple shafts rather than using fewer large cutting elements. This segmentation achieves effective comminution and acceptable flow resistance while reducing the weight of individual cutting elements and the overall device.
Solution Approach 2:
Cutting elements are strategically positioned at specific locations on the comminuting shafts where they are most effective. The cutting elements are distributed axially and circumferentially to optimize comminution performance locally, achieving overall effective comminution without requiring oversized cutting elements that would increase device weight.
3Object-generated harmful factors
If comminuting cutting element diameter is increased to reduce flow resistance, then flow resistance decreases, but manufacturing cost increases
Solution Approach 1:
The comminuting task is divided among multiple smaller cutting elements on multiple shafts rather than using fewer large-diameter cutting elements. This segmentation approach reduces the diameter requirements of individual cutting elements, lowering manufacturing costs while achieving effective comminution and acceptable flow resistance through the combined action of multiple elements.
Solution Approach 2:
Multiple comminuting shafts with cutting elements serve the universal function of comminution collectively. Each shaft and cutting element assembly can be manufactured as a standardized module, reducing per-unit manufacturing costs through economies of scale and standardization, while the combined system achieves the required comminution performance and flow resistance characteristics.
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
The solution effectively reduces flow resistance and ensures reliable comminution across different solid content levels, achieving efficient particle size reduction with reduced installation and operational costs.
Implementation Method 1
a first screening device having a first screening wall exhibiting a plurality of slots which is arranged in the housing interior adjacent to the first comminuting shaft
Implementation Method 2
The comminution of the solids in this case typically occurs due to shearing and breaking forces which act on the solids when they pass between the comminuting cutting elements
Implementation Method 3
The comminution of the solids in this case typically occurs due to shearing and breaking forces which act on the solids when they pass between the comminuting cutting elements
Implementation Method 4
a drive device for driving the first and second comminuting cutting shaft in a rotational movement
Data Source
AI summary
A comminuting device for solids-conducting liquids includes a housing with an inlet opening, an outlet opening, and a housing interior extending from the inlet opening to the outlet opening, a first comminuting shaft extending through the housing interior and arranged to rotate about a first comminuting axis. A second comminuting shaft extends through the housing interior and is arranged to rotate about a second comminuting axis. A screening device has a screening wall comprising a plurality of slots arranged in the housing interior adjacent to the first comminuting shaft. A clearing device has a plurality of clearing elements which can be moved relative to the screening wall along a movement path and which extend through the plurality of slots starting from a clearing shaft arranged on one side of the filter wall to at least one portion of the movement path.