Reduced Noise Abrasive Blasting System With Acceleration Hose
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional abrasive blasting systems produce excessive noise, leading to hearing loss and situational awareness issues for operators, and are large and heavy, causing ergonomic stress and fatigue.
Innovation Solution
The development of reduced noise abrasive blasting systems that utilize a longer acceleration hose or nozzle with a smaller inner diameter and a transition coupling to maintain abrasive particle velocity while reducing gas exit velocity, resulting in lower noise production and improved ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional supersonic abrasive blasting systems are used, then productivity is maintained, but noise levels exceed safety limits and cause hearing loss
Solution Approach 1:
The invention changes the gas velocity parameter by reducing it to subsonic levels while maintaining abrasive particle velocity through extended acceleration distance. This parameter change directly reduces noise emission while preserving blasting productivity, resolving the contradiction between noise reduction and productivity maintenance
2Power
If conventional large and heavy abrasive blasting systems are used, then sufficient power is delivered, but ergonomic stress and operator fatigue increase
Solution Approach 1:
The invention substitutes a portion of the mechanical system (the carried portion of the blasting apparatus) with a more efficient gas dynamics system. By using extended acceleration distance rather than increased mass or power to achieve the same blasting effect, the system reduces weight and improves ergonomics while maintaining sufficient blasting power
3Object-generated harmful factors
If gas velocity is reduced to lower noise, then noise production decreases, but abrasive particle acceleration may be insufficient
Solution Approach 1:
The invention solves the contradiction by adding the dimension of distance to the acceleration process. Instead of relying solely on high gas velocity (one dimension), the system uses extended acceleration distance (another dimension) to achieve the same abrasive particle velocity with lower gas velocity, thereby reducing noise while maintaining particle speed
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
These systems achieve significant noise reduction, maintaining productivity and efficiency while reducing operator fatigue and noise-induced health risks, allowing for longer operational periods without compromising performance.
Implementation Method 1
Gases mixed with abrasive media 18 are compressed when traveling through convergent section 32 and then dispersed through divergent section 36, causing media 18 particles to accelerate within the divergent section 36 of nozzle 26
Implementation Method 2
The abrasive blasting media in these setups undergo most of their acceleration over a short distance in and following exit from nozzle 26
Data Source
AI summary
Reduced noise abrasive blasting assemblies and systems are described. The new assemblies and systems are comprised of standard blast hose, accelerator hose, couplings and nozzle. The improved abrasive blasting system maintains abrasive particle velocity while decreasing the exit gas velocity and consequently decreasing sound production. This is accomplished through an acceleration section with reduced inner diameter and sufficient length to provide the necessary abrasive particle velocity. The new system maintains the productivity and efficiency of conventional abrasive blasting systems but with greatly reduced acoustic noise production and reduces operator fatigue due to the lower weight of the carried portion of the system.