Drilling Sound Absorber Using Reciprocating Piston and Resilient Elements
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Solution Overview
Problem
Drilling processes in mining and geological exploration generate excessive noise, posing a risk to workers' hearing and being undesirable near inhabited areas, necessitating an effective sound absorber for drilling apparatuses.
Innovation Solution
A sound absorber is designed to be mounted between a drilling apparatus and a drill bit, featuring a sleeve with a chamber and a reciprocating piston, along with resilient elements made of elastomers or polypropylene, which dissipate vibrations and sounds by filling the gap between the apparatus and drill bit attachments, allowing for efficient sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a sound absorber is added to the drilling apparatus, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The sound absorber is nested within the existing drilling apparatus structure, with the piston moving within the chamber formed by the sleeve and end walls. This nesting approach allows noise reduction functionality to be integrated without significantly increasing overall device complexity or requiring separate external components.
Solution Approach 2:
The sound absorber utilizes a flexible piston that moves within the chamber, creating variable volume spaces that absorb sound waves. The flexible nature of the piston allows it to respond to pressure changes from drilling operations while maintaining structural integrity, providing noise reduction through mechanical flexibility rather than complex acoustic structures.
2Object-affected harmful factors
If resilient elements are used for sound absorption, then noise reduction is improved, but manufacturing cost increases
Solution Approach 1:
The resilient elements are designed with specific material properties and geometric parameters optimized for sound absorption at drilling noise frequencies. By carefully selecting and tuning these parameters, the design achieves effective noise reduction using standard manufacturing processes and readily available materials, avoiding the need for expensive specialized components.
Solution Approach 2:
The sound absorber employs composite construction combining the piston, chamber walls, and resilient elements to create an integrated noise reduction system. The resilient elements may use composite material structures that provide both acoustic damping and mechanical durability, achieving cost-effective noise control through material optimization rather than expensive single-material solutions.
3Object-affected harmful factors
If a complex absorbing system with multiple resilient elements is used, then sound absorption effectiveness is improved, but device complexity increases
Solution Approach 1:
The absorbing system is segmented into distinct functional zones: the first resilient element for primary sound absorption, the second resilient element for additional damping, and the third resilient element for fine-tuning acoustic properties. This segmentation allows each element to be optimized for specific frequency ranges or absorption mechanisms, achieving superior noise reduction through modular, manageable components rather than a monolithic complex system.
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 sound absorber effectively reduces noise generated during drilling by dissipating undesirable vibrations and sounds, making it simple to manufacture and maintain, and is retrofittable to existing equipment, thus addressing the noise issue while being cost-effective.
Implementation Method 1
an absorbing system including a first resilient element provided in the chamber between the piston distal end and the chamber distal end
Implementation Method 2
the first resilient element is made of an elastomer
Data Source
AI summary
A sound absorber mountable between a drilling apparatus and a drill bit. The sound absorber defines an absorber axis therealong. The sound absorber includes a sleeve defining a chamber extending axially therealong, the chamber defining axially opposed chamber proximal and distal ends, the chamber being delimited by a chamber peripheral wall extending between the chamber proximal and distal ends and a chamber distal end wall provided at the chamber distal end, the sleeve defining a sleeve aperture leading to the chamber at the chamber proximal end. A piston is mounted to the sleeve so that at least part of the piston is in the chamber, the piston being reciprocatingly movable substantially axially along the sleeve, the piston defining axially opposed piston proximal and distal ends An absorbing system includes a first resilient element provided in the chamber between the piston distal end and the chamber distal end.