Axial Impeller Pump with Integrated Cutting Edges
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Solution Overview
Problem
Machine tools used for machining light metals, such as aluminum, generate long metal chippings that contaminate cooling liquids, posing a challenge for pumps to efficiently and reliably handle these contaminants.
Innovation Solution
A pump with an axial impeller featuring cutting edges on its bottom side, which rotates to cut or chop contaminants while sucking liquid, combining the functions of suction and chopping, and optionally incorporating a radial impeller for enhanced throughput and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external chopper is used to cut metal chippings, then the pump can handle contaminated cooling liquid, but the device complexity increases and pump efficiency decreases
Solution Approach 1:
The invention merges the cutting function with the impeller by integrating cutting edges directly onto the impeller blades. This eliminates the need for a separate external chopper device, reducing device complexity while maintaining the ability to handle contaminated cooling liquid with metal chippings.
Solution Approach 2:
The impeller is designed to perform multiple functions simultaneously: it provides the primary pumping action and also performs the cutting of metal chippings through integrated cutting edges. This multi-functionality eliminates the need for separate cutting devices and improves overall system efficiency.
2Reliability
If an external chopper is used to cut metal chippings, then the pump can handle contaminated cooling liquid, but pump efficiency decreases
Solution Approach 1:
By combining the cutting function with the impeller in a single integrated component, the invention eliminates energy losses associated with separate cutting devices and improves pump efficiency while maintaining the ability to handle contaminated cooling liquid.
3Manufacturing precision
If the axial impeller rotates with cutting edges, then contaminants are chopped effectively, but centrifugal forces may disturb the liquid
Solution Approach 1:
The cutting edges are positioned at specific locations on the impeller blades where they can effectively chop contaminants without generating excessive centrifugal forces that would disturb the liquid. The local cutting action is optimized to minimize harmful effects while maintaining cutting precision.
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 axial impeller design achieves high suction efficiency, chops contaminants effectively, and maintains pump performance by preventing exposure to centrifugal forces, allowing for reliable handling of long chippings and improving overall pump efficiency compared to external chopper systems.
Implementation Method 1
an axial impeller with helical blades for sucking liquid through an intake opening
Implementation Method 2
the impeller blades are provided, at the bottom side of the axial impeller with a first cutting edge that, when the axial impeller rotates, is in cutting relation with at least one second cutting edge formed at the intake opening
Data Source
AI summary
A pump having an axial impeller (40) with helical blades (38) for sucking liquid through an intake opening (38) formed at a bottom side of the axial impeller (40), in which the blades (38) are provided, at the bottom side of the axial impeller (40), with a first cutting edge (58) which, when the axial impeller (40) rotates, are in cutting relation with at least one second cutting edge (60) formed at the intake opening (36).