Grinding Disc Axial Radial Channel Dust Extraction
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Solution Overview
Problem
Conventional grinding discs face inefficiencies in dust extraction, leading to increased flow resistance, swirls, and blockages, which result in incomplete removal of grinding residues and potential re-deposition on the workpiece.
Innovation Solution
The grinding disc features axial through-channels connected to radial extraction channels, which open into peripheral air intake openings, creating a main flow direction that reduces flow resistance and enhances suction, along with a reduced number of dust extraction openings, ensuring efficient dust removal through a laminar airflow system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If numerous dust extraction openings are arranged on the fastening surface, then dust extraction capability is improved, but flow resistance increases and the system becomes more complex
Solution Approach 1:
The extraction channel system is segmented into three functional types: axial through-channels for direct dust removal, radial extraction channels for peripheral dust collection, and connecting channels for channel interconnection. This segmentation allows each channel type to serve a specific dust extraction function, improving overall efficiency while maintaining manageable system complexity through functional specialization.
Solution Approach 2:
The patent introduces a multi-dimensional extraction architecture by adding radial extraction channels that extend from the axial through-channels toward the peripheral air intake openings. This dimensional extension creates additional extraction pathways in the radial direction, enabling dust removal from multiple spatial dimensions simultaneously and reducing flow resistance by distributing the extraction load across three-dimensional channel networks.
2Device complexity
If traditional extraction channel arrangements are used, then structure simplicity is maintained, but flow resistance increases and suction efficiency decreases
Solution Approach 1:
Connecting channels serve as intermediaries that link axial through-channels to radial extraction channels, creating a hierarchical extraction network. These intermediary channels facilitate smooth airflow transitions between different extraction zones, reducing flow resistance by eliminating direct conflicts and swirls that would occur in simpler single-direction extraction systems.
Solution Approach 2:
The extraction channel system is designed to optimize pneumatic airflow patterns, utilizing pressure gradients and flow dynamics to enhance dust extraction. The arrangement of axial, radial, and connecting channels creates coordinated airflow paths that reduce turbulence and swirls, improving suction efficiency while maintaining structural simplicity through aerodynamic channel geometry.
3Productivity
If dust extraction openings are positioned to maximize dust capture, then dust removal completeness is improved, but airflow patterns become turbulent causing swirls and blockages
Solution Approach 1:
The extraction channel system incorporates dynamic airflow management through its three-channel architecture, where axial, radial, and connecting channels work together to adapt airflow patterns to the varying dust distribution across the grinding disc surface. This dynamic channel arrangement maintains laminar flow by distributing airflow across multiple pathways, preventing localized turbulence and swirls that would cause blockages.
4Productivity
If peripheral air intake openings are added, then dust extraction efficiency is improved, but the number of components and channels increases
Solution Approach 1:
The peripheral air intake openings serve multiple functions: they provide air supply for dust extraction, create negative pressure to enhance suction, and help establish laminar airflow patterns. The radial extraction channels connected to these intake openings simultaneously perform dust collection and airflow regulation, making the system components multi-functional and reducing the need for separate dedicated elements for each function.
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 significantly reduces flow resistance and swirls, ensuring nearly complete extraction of dust particles, minimizing re-deposition on the workpiece and increasing the available grinding surface.
Implementation Method 1
In particular it is avoided that the dust airstream is deflected in one direction, in peripheral direction of the grinding disc, before exiting, device side, via the dust outlet openings. A type of jet nozzle is produced between a respective air intake opening and an associated dust outlet opening by the main flow direction directed upwards from laterally outside, which nozzle sucks air, and thus grinding dust, from other channel sections of the extraction channel in the manner of an ejector
Implementation Method 2
which nozzle sucks air, and thus grinding dust, from other channel sections of the extraction channel in the manner of an ejector, with the result that this grinding dust is carried along
Implementation Method 3
A type of jet nozzle is produced between a respective air intake opening and an associated dust outlet opening by the main flow direction directed upwards from laterally outside, which nozzle sucks air, and thus grinding dust, from other channel sections of the extraction channel in the manner of an ejector
Data Source
AI summary
A grinding disc for a grinding device, with a fastening interface formed for rotationally fixed fastening to a driven member of the grinding device such that the grinding disc, limited by a peripheral disc rim surface, can be driven into a grinding movement. The grinding disc has a fastening surface on a working side, to which fastening surface a grinding means provided with an abrasion layer can be or is detachably fastened via fastening means. The grinding disc has dust extraction openings arranged on the fastening surface and air intake openings arranged on the disc rim surface, which are connected respectively to dust outlet openings arranged on the device side of the grinding disc via an extraction channel system running in the grinding disc, with the result that, during grinding, the resulting grinding dust can be removed by means of a dust extraction device coupled to the grinding device.