防爆对旋式轴流局部通风机（附外文翻译）.doc

诚信明 由本人独立完成观点方法数据和文献等的引用已在文中指出,并与参考文献相对应 ? ? 毕业论文（设计）作者签名： 签名日期： 年 月 日 摘 要 目前，我国部分矿井在通风系统中采用了两级对旋式轴流式风机，以替代传统的轴流式风机，本次设计的BD局部通风机，其全称是：防爆对旋式轴流风机，是对旋式风机的一种。其名称已经决定了风机的结构设计、材料选择等。本次设计力争突出BDJ风机独特的结构和优越的性能。气动部件的设计对于风机的整体性能至关重要，所以首先进行了风叶的设计，着重讨论了两级叶轮负载的分配问题，各参数的选择。采用孤立翼型法设计风叶。接着设计了其他的重要部件，如：集流器、整流罩、扩散器、风筒、消声结构等。然后对风机的叶轮、主轴进行强度校核，最后讨论风机的安装所遇到的问题。 在风机各零部件材料的选择方面，要满足强度和防爆两方面的要求。特别是风叶和风筒的材料，两者至少一个要采用铝合金材料。电动机的选择对于防爆风机来说是很重要的，本次设计选择了YBF电动机，这是专门的风机用防爆电动机，另一优点是重量轻，适宜安装在风机内部。 关键词：BDJ风机孤立翼型法防爆 Abstract At present, part of the mine ventilation system used in the two pairs of rotating axial flow fan, as an alternative to the traditional axial fan. This designing BDJ local fans’ full name is: Ex-rotating axial flow local fan is a rotating fan. Its name has already decided the fan structure design, material selection and so on. The unique fan design strives to highlight the BDJ structure and superior performance. The designing of pneumatic components is critical to the overall performance for the fans, so the fan blade is designed first, focused on two wheel load distribution, the parameter selection. Blade airfoil design method is used in isolation. Then the design of other important components, such as: collector, shrouds, diffuser, hair dryer, muffler structure. Then check the fan impeller, shaft strength , and finally discuss the installation of wind turbine problems encountered. Various components in the fan is chosen to meet both the strength and explosion-proof requirements, especially the fan and the duct material, which at least one to two aluminum alloy. Choice for the explosion-proof fan motor is very important. This design chosen YBF motor, which is a special explosion-proof fan motor. The other advantage is light weight, suitable for installation in wind turbines. Key words: BDJ fan explosion；Isolated airfoil method；Explosion-proof 目录 前言 1 第一章 绪 论 2 1.1 设计任务 2 1.1.1 拟定通风机设计工矿点 2 1.1.2 主要内容 3 1.2 对旋式轴流风机 5 1.2.1 对旋式风机出现的背景 5 1.2.2对旋式通风机的工