Cutter Pump Quick-Assembly Cutting Unit Design
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Solution Overview
Problem
Existing cutter pumps face challenges in simplifying and quickening the assembly of the cutting unit, requiring complex adjustments and precise component assembly to ensure optimal cutting efficiency, which is operator-dependent and prone to errors.
Innovation Solution
A cutter pump design featuring a self-locking nut to secure the cutting blade to the shaft and an axially movable cutting plate, allowing for adjustable clearance without altering the impeller's position, simplifying assembly and reducing components by integrating the impeller and cutting blade with a shared shaft and using adjustable spacer elements for precise cutting efficiency adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional adjustment methods using spacer washers and threaded screws are used, then cutting efficiency can be adjusted, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The invention extracts the adjustment function from the traditional complex assembly of spacer washers and threaded screws, concentrating it into a single movable cutting plate that can be adjusted independently without affecting other components
Solution Approach 2:
The cutting unit is segmented into independently adjustable components: the cutting blade assembly (fixed to shaft) and the cutting plate (movable on pump body), allowing separate adjustment of each component to achieve precise clearance control
2Manufacturing precision
If multiple threaded components and spacer washers are used for adjustment, then cutting clearance can be controlled, but assembly time increases
Solution Approach 1:
The cutting blade is pre-mounted on the shaft with fixed positioning, so that during assembly only the cutting plate needs to be adjusted and locked, significantly reducing assembly time while maintaining precise clearance control
Solution Approach 2:
The movable cutting plate incorporates self-locking mechanisms (such as locking pins or threads) that allow the operator to adjust and secure the clearance position in a single operation without requiring multiple separate adjustment steps
3Adaptability or versatility
If the cutting blade and impeller are mounted on separate shaft portions, then assembly flexibility is provided, but the number of components increases
Solution Approach 1:
The invention merges the cutting blade and impeller mounting onto a single shaft assembly, reducing the total component count while maintaining assembly flexibility through the independent adjustability of the cutting plate on the pump body
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 design simplifies the assembly process, reduces component complexity, and enhances cutting efficiency by allowing for precise adjustment of the cutting unit without requiring operator expertise, ensuring consistent performance and reduced assembly time.
Implementation Method 1
at least one self-locking nut suited to be screwed to the end of the shaft that projects from the cutting blade
Implementation Method 2
self-locking nut suited to be screwed to the end of the shaft
Implementation Method 3
said cutting plate can be translated axially, so that it is possible to vary its distance from said cutting blade
Data Source
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AI summary
The invention is a cutter pump comprising an impeller (20) mounted on a driving shaft (30), a rotary cutting blade (50) mounted so that it is coaxial with said impeller (20) and rotates together with it, and a cutting plate (60) constrained to the pump body (14) and defining the cutting interface (T) together with said cutting blade (50). Said cutting blade (50) comprises a through axial opening (51) which is not threaded and is suitable for the insertion of said shaft (30), and wherein said cutting blade (50) and said impeller (20) are mechanically connected to said shaft (30) by means of at least one tab (32), so that they rotate integrally with each other and with said shaft (30) itself.