Quieting of Continuous Miner Scrubber Fan Noise

连续矿工洗涤器风扇噪音的静音

• 批准号: 8315145
• 负责人: Kyle Schwartz
• 金额: $ 13.64万
• 依托单位: AVEC, INC.
• 依托单位国家: 美国
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2013-12-15
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8315145
• 关键词: Quieting; Continuous; Miner; Scrubber; Fan

DESCRIPTION (provided by applicant): This proposal targets a specific mission of NIOSH and the current SBIR solicitation: hearing loss prevention for mine workers. The main objective of this work is to reduce the noise radiated by Continuous Miners (CM). Since CMs are responsible for about 30% of noise exposures above permissible levels [MSHA, 2006], reducing the noise in this machine would have a significant impact on the health of miners. The approach to achieve noise reduction in the CM is to target one of the major noise sources, the scrubber duct system. Although several attempts have been made over the years to reduce the noise from CMs, the fan noise itself has not been targeted in previous studies. Furthermore, most of these fans have been redesigned for over 20 or 30 years ago. The main problem with the current design is that it was designed with efficiency, pressure rise and reliability in mind, whil not considering noise as a major design variable. It is our expert opinion that completely redesigning the fan (rotor and stators) using modern computational tools and technologies would have a very significant impact on the noise. In this process, low noise will be considered the major target. This is an approach that we have successfully implemented in different military and commercial projects where noise is a major concern, e.g. unmanned air vehicles. Even in these highly-demanding applications we have found that aerodynamic efficiency can be kept high while significantly reducing noise. The objective of the Phase I work is to conduct a proof-of-concept design for a particular CM using state- of-the-art computational tools and control technologies. The newly designed fan properties (aerodynamic and acoustic) will be compared to those of a current CM fan to determine the potential of the proposed approach. This is possible due to Joy Mining Machinery agreeing to support our work by providing technical assistance and information about current systems (see letter of support). This early contact with a major mining equipment manufacturer also provides a better chance of success to the project by making sure that any results from our work could rapidly be implemented in the production line and therefore the mines. PUBLIC HEALTH RELEVANCE: Exposure to noise above permissible levels is a major occupational hazard that results in Noise Induced Hearing Loss (NIHL) in 90% of mine workers by age 50. The continuous miner (CM), one of the most common equipment's in underground mining, has been identified as a major noise source that exposes 30% of its operators to noise above permissible levels. The goal of the proposed work is to reduce the noise from the CM by redesigning the fan in the scrubber system (identified as one of the major sources) using modern computational tools from the aeronautical industry.

描述(由申请人提供)：本提案针对NIOSH的一项特定任务和当前的SBIR征集：矿工听力损失预防。这项工作的主要目标是减少连续采矿机(CM)的辐射噪声。由于CMS的噪声暴露超过允许水平的约30%[MSHA，2006]，降低这台机器的噪音将对矿工的健康产生重大影响。在CM中实现降噪的方法是针对主要噪声源之一的洗涤器管道系统。尽管多年来已经进行了几次尝试来降低CMS的噪音，但在以前的研究中并没有针对风扇噪音本身。此外，这些风扇中的大多数都是在20或30年前重新设计的。目前设计的主要问题是，它的设计考虑了效率、压力上升和可靠性，而没有将噪声作为主要的设计变量。我们的专家认为，使用现代计算工具和技术完全重新设计风扇(转子和定子)将对噪音产生非常显著的影响。在这个过程中，低噪音将被认为是主要的目标。这是我们在不同的军事和商业项目中成功实施的一种方法，这些项目的噪音是一个主要问题，例如无人驾驶飞行器。即使在这些高要求的应用中，我们也发现空气动力学效率可以保持在很高的水平，同时显著降低噪音。第一阶段工作的目标是使用最先进的计算工具和控制技术为特定的CM进行概念验证设计。新设计的风扇性能(气动和声学)将与目前的CM风扇进行比较，以确定拟议方法的潜力。这是因为喜悦矿机同意通过提供技术援助和有关当前系统的信息来支持我们的工作(见支持函)。与一家主要采矿设备制造商的早期接触也为该项目提供了更好的成功机会，确保我们的工作成果能够迅速落实到生产线上，从而实现在矿山。 与公共健康相关：暴露在超过允许水平的噪声中是一种主要的职业危害，到50岁时，90%的矿工会出现噪声性听力损失(NIHL)。连续采矿机(CM)是地下采矿中最常见的设备之一，已被确定为主要噪声源，使30%的作业人员暴露在超过允许水平的噪声中。拟议工作的目标是通过使用航空工业的现代计算工具重新设计洗涤器系统(被确定为主要来源之一)中的风扇来减少CM的噪音。