1、 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 BDJ 局部通风机，其全称是：防爆对旋式轴流局部通风机， 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
2、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：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
3、 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 component
4、s 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 dry
5、er, 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
6、 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 -
