Exhaust Noise Reduction by Application of Expanded Collecting System in Pneumatic Tools and Machines

Abstract

In this paper, we demonstrate how to reduce the noise level of expanded air from pneumatic tools. Instead of a muffler, we propose the expanded collecting system, where the air expands through the pneumatic tube and expansion collector. We have elaborated a mathematical model which illustrates the dynamics of the air flow, as well as the acoustic pressure at the end of the tube. The computational results were compared with experimental data to check the air dynamics and sound pressure. Moreover, the study presents the methodology of noise measurement generated in a pneumatic screwdriver in a quiet back room and on a window-fitting stand in a production hall. In addition, we have performed noise measurements for the pneumatic screwdriver and the pneumatic screwdriver on an industrial scale. These measurements prove the noise reduction of the pneumatic tools when the expanded collecting system is used. When the expanded collecting system was applied to the screwdriver, the measured Sound Pressure Level (SPL) decreased from 87 to 80 dB(A).

Advances in Fluid Power Systems

“…Grybos et al demonstrated how to reduce the level of noise from the expanded air from pneumatic tools [4]. Instead of a muffler, an expanded collecting system was proposed, where the air expands through the pneumatic tube and expansion collector.…”

A Review of Energy Overconsumption Reduction Methods in the Utilization Stage in Compressed Air Systems

“…As mentioned above, the main drawback of compressed air systems is their low energy efficiency, with only 5-10% of the electrical energy input to the compressor effectively being utilized in pneumatic actuators or motors [1,9]. Other disadvantages of compressed air systems include low precision in motion control [10], noise [11,12], and significant air leaks [1]. As a result, the Compressed Air and Gas Institute (CAGI), the European Association of Manufacturers of Compressors, Vacuum Pumps, Pneumatic Tools and Air and Condensate Treatment Equipment (PNEUROP), and entrepreneurs are actively looking for solutions to address this energy loss issue [13,14].…”