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blasthole drilling rig,down the hole drill rig [886]

crawler drill rig rotary hydraulic rock drill performance, should be in product development, manufacturing and use of hydraulic rock drill the rotary performance as an important indicator of assessment and evaluation. Noise characteristics of hydraulic rock drill Compared with pneumatic rock drill, hydraulic rock drill no exhaust noise. Despite the sound pressure level is much lower than the crawler water well drill rigs hydraulic rock drill pneumatic rock drills (pneumatic rock drill 1m distance of the sound pressure level of 110db (a) above), but still higher than90db (a), up to 100db (a) around, and the sound energy concentrated in the 1 ~ 5khz frequency segment does not exceed the human ear is sensitive frequency range, if not take the well drilling rigs for sale noise protection measures body of workers is still harmful. Hydraulic rock drill pilot study noise source of the noise generated by the impact mechanism broken rock noise, the noise generated by the rotating mechanism and drill bits. Noise generated by the impact mechanism striking piston solder tail closed space generated jet noise, impact structural noise generated after the piston impact solder and is deformed due to an down the hole drill rig impact surface is generated around the pressure pulse noise, wherein the structure-borne noise is the main ingredient noise frequency characteristics of the structural vibration frequency consistent. The slewing mechanism noise from the slewing mechanism hydraulic and mechanical noise, but the noise intensity lower than the noise generated by the impact mechanism, sound pressure level difference of more than 10db (a), so little effect on the hydraulic rock drill noise evaluation. The drill head broken rock noise generated hydraulic rock drill noise test chiseled into the rock drill head 0.5m deep, this effect is negligible. Therefore, the research, testing and analysis of hydraulic rock truck mounted drilling rig drill noise, mainly focus on the noise generated in the shock structure.

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