Nozzle-Integrated Noise Suppressor for Blasting Guns
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Solution Overview
Problem
Blasting guns emit excessive noise, causing occupational safety hazards and compromising user inconspicuity, with prior noise suppressors reducing performance while only marginally reducing noise.
Innovation Solution
A noise suppressor with a cylindrical opening and diverging cross-sectional area within the nozzle, featuring a suppressor inlet larger than the nozzle liner outlet, and a step-like transition to maintain kinetic energy and velocity of abrasive media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate silencer device is attached onto the end of the gun nozzle, then noise is reduced, but the overall performance of the blasting gun is reduced and noise reduction is only marginal
Solution Approach 1:
The noise suppressor is merged with the nozzle by positioning it internally adjacent to the nozzle liner, combining two previously separate functions (noise suppression and blasting) into a single integrated component, thereby eliminating the performance penalty associated with external silencer attachments
Solution Approach 2:
The noise suppressor is nested within the nozzle structure, with the suppressor inlet positioned adjacent to the nozzle liner outlet. This nested arrangement allows the noise suppressor to occupy space within the existing nozzle volume rather than adding external bulk, maintaining compact geometry while achieving effective noise reduction
2Object-affected harmful factors
If the suppressor inlet cross-sectional area is greater than the nozzle liner outlet cross-sectional area, then noise suppression is improved, but the velocity of abrasive media may be reduced
Solution Approach 1:
The suppressor inlet cross-sectional area is deliberately designed to be greater than the nozzle liner outlet area, creating a specific geometric parameter relationship that optimizes noise suppression. This parameter change is compensated by the diverging entrance length geometry, which maintains flow velocity through gradual area transition
3Ease of manufacture
If a straight or converging exit length is used in the suppressor, then manufacturing is simplified, but noise suppression performance is reduced
Solution Approach 1:
The suppressor exit length is designed with a diverging geometry rather than a straight or converging shape. This curved/diverging configuration optimizes noise suppression by controlling flow expansion and reducing turbulence, while still being manufacturable using standard machining processes
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 solution effectively reduces noise while maintaining or improving the performance of the blasting gun by enhancing kinetic energy and velocity of the abrasive media, addressing the limitations of prior art noise suppressors.
Implementation Method 1
The suppressor can further have a diverging cross-sectional area leading from the suppressor inlet through an entrance length
Implementation Method 2
The noise suppressor of the presently disclosed embodiments, together with the nozzle liner, improved the kinetic energy and velocity of blasted particles
Data Source
AI summary
Disclosed is a noise suppressor for use inside a nozzle and adjacent a nozzle liner. The suppressor can include an inlet with a cross-sectional area larger than that of the nozzle liner outlet. The suppressor can also have an entrance length with a diverging cross-sectional area, and an exit length extending from the entrance length. By incorporating this geometry, the noise suppressor reduces noise and improves performance of the apparatus in which the suppressor is used.