Abrasive Fluidizing System for Water Jet Nozzle Flow
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Solution Overview
Problem
Existing abrasive jet systems face challenges in delivering a uniform and reliable quantity of fine abrasive materials due to their tendency to clump or pack, which can lead to bridging and resistance in flow, affecting the consistency and efficiency of the abrasive water jet cutting process.
Innovation Solution
A fluidizing system that uses a controlled air stream, including pulsed air, to mobilize and maintain a fluidized state of abrasive materials near the metering orifice, preventing bridging and ensuring consistent flow through the nozzle assembly by incorporating aerators in the hopper to mix air with the abrasive and a filter assembly to prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine abrasive materials are used to improve cutting precision, then manufacturing precision is improved, but the abrasive material tends to clump or pack, causing bridging and resistance in flow
Solution Approach 1:
The patent introduces a fluidizing system that uses a controlled air stream (pneumatic) to lift and fluidize fine abrasive particles in the hopper. The air stream prevents particles from clumping or packing by continuously suspending them, ensuring consistent flow through the metering orifice to the nozzle assembly while maintaining cutting precision.
Solution Approach 2:
The system changes the physical state of the abrasive material from a static packed state to a dynamic fluidized state by introducing air flow. This parameter change (from resting particles to suspended particles) eliminates bridging and ensures reliable, consistent flow of fine abrasives through the metering orifice.
2Quantity of substance
If abrasive material is pressurized in an external hopper to improve delivery control, then quantity control is improved, but fine particles create difficulty in delivering a uniform quantity due to clumping
Solution Approach 1:
The fluidizing system uses a controlled air stream to replace mechanical pressure alone in delivering abrasive material. The pneumatic lift mechanism provides more uniform distribution of fine particles through the metering orifice, eliminating the clumping problem that occurs with pure pressurized feed systems.
Solution Approach 2:
Air acts as an intermediary substance between the hopper and the metering orifice. The air stream mediates the flow of abrasive particles, preventing direct particle-to-particle contact that causes clumping, and ensuring uniform delivery of abrasive material to the nozzle assembly.
3Reliability
If a controlled air stream is introduced to fluidize abrasive material and prevent clumping, then flow consistency is improved, but device complexity increases due to additional components
Solution Approach 1:
The fluidizing system is integrated into the existing hopper structure, and the air stream serves multiple functions: it fluidizes the abrasive material, prevents bridging, and aids in uniform delivery through the metering orifice. This multi-functionality reduces the need for separate complex mechanisms.
Solution Approach 2:
The use of a controlled air stream provides a relatively simple and reliable method to fluidize abrasive material compared to complex mechanical agitation systems. The pneumatic approach requires fewer moving parts and maintains consistent flow by leveraging the natural properties of gas flow to suspend and distribute particles uniformly.
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 fluidizing system effectively delivers a uniform and reliable quantity of abrasive materials, enhancing the consistency and efficiency of the abrasive water jet cutting process by preventing clumping and ensuring smooth flow, thereby improving cutting performance.
Implementation Method 1
A fluidizing system that uses a controlled air stream, including pulsed air, to mobilize and maintain a fluidized state of abrasive materials near the metering orifice
Implementation Method 2
incorporating aerators in the hopper to mix air with the abrasive
Data Source
AI summary
Systems and methods for fluidizing an abrasive particulate material for an abrasive water jet are disclosed herein. In one embodiment, the abrasive material is delivered to a metering orifice in a distributor. Pressurized pulses of air can be directed around a circumference of the distributor to at least partially fluidize the particulate material to facilitate the material passing through the metering orifice. From the metering orifice, the abrasive particulate material is entrained in a water jet for a cutting procedure or other suitable application.