矿用旋轴流式风机的设计 毕业设计.doc

摘要
此次设计是矿用通风机,采用的是对旋通风机,由于矿井开采时会有瓦斯气体溢出,可能引起爆炸,给工作人员增加了危险系数,对矿井的安全生产都是不利的。此次设计是局部通风,采用了对旋隔爆轴流通风机,通风方式为压入式,采用了相同型号隔爆电机驱动叶轮,提高了矿下安全生产和人员的安全。此通风机具有风量大、体积小等特点,并且在通风机的两级筒体及扩散器外面用超细玻璃棉的吸声结构, 并在导流装置内填充吸声材料,达到了降噪的要求。
根据所给的设计参数及有关的设计要求。具体内容包括:总体结构方案的确定,叶轮的设计,流线罩,扩散器和集流器的设计,风机叶轮翼型尺寸的确定,通风机消声装置的设计。本次设计更加注意对旋通风机的消音问题,注重了电动机的隔爆设计。
关键词:对旋;隔爆;轴流通风机
Abstract
This design for mine fan,using the disrotatoru ventilator,because of the mine mining will have gas overflow,may cause blast,increases the risk to staff,the safety of the mine production will be design is local ventilation,adopted for explosion-proof axial flow fan,ventilation mode is pressed into the type,using the same model, flame-proof motor driven impeller,improve the mine production safety and personnel fan has the the characteristic such as big air volume small volume,and in the two stage of the ventilator outside of the cylinder and the diffuser with superfine glass wool sound-absorbing structure,and fill in the diversion sound-absorbing material,has reached the requirement of noise reduction.
According to the given design parameters and design concrete content includes:the determination of general structure scheme,the design of the impeller,streamline cover,the design of the diffuser and the current collector,streamline cover,the design of the diffuser and the current collector,the determination of fan aerofoil impeller size,fan muffler device more attention to the design of rotary fan sound attenuation problem,pay attention to the flame-proof motor design.
Keywords: counter rotating;flameproof;aerofoil fan
目录
摘要 I
Abstract II
第1章绪论 1
选题意义 1
通风机的原理及发展历史 1
通风机的分类 2
按工作原理的通风机分类 2
按气流运动方向的通风机分类 2
按压力大小的通风机分类 3
按应用领域的通风机分类 3
设计理论基础分析 3
第2章通风机主要结构设计 6
通风机主要结构参数的确定 6
确定电机的转速 6
叶轮直径与叶顶圆周速度的确定 7
流量系数及全压系数 8
电机的选择 9
叶轮的结构设计 9
第一级叶轮叶片环的气流参数和空气动力负荷系数计算 12
第一级叶轮叶片