锅炉风机介绍
风机结构
锅炉离心式风机主要结构如下。
叶轮：产生压头，传递能量。
机壳：收集从叶轮出来的气体引向排出口，把气流的部分动能转变为压力能。
入口调节风门：调节机出力，将设备与系统隔离。(也叫导流器，有的采用变频技术，液力偶和器调节出力，)
大轴：传递扭矩
轴承：承受转子的径向轴向载荷，限制转子的径向轴向的运动位置。
靠背轮:联接电动机，传递轴功率
集流器：在损失最小的情况下，使气流均匀的充满叶轮进口断面。
轴承箱：装置轴承，填补润滑液。
Fan structure
The main structure of boiler centrifugal fan is as follows.
Impeller: Produce pressure, transfer energy.
Shell: Collect the gas from the impeller and lead it to the outlet, which converts part of the kinetic energy of the airflow into pressure energy.
Entrance regulator: regulator output. Separate the equipment from the system. (Also known as diverter, some use frequency conversion technology, hydraulic couple and regulator output.)
Large Shaft: Transfer Torque
Bearing: Bearing the radial and axial load of the rotor, restricting the radial and axial position of the rotor.
Back wheel: Connecting motor, transferring shaft power.
Collector: In the case of minimum loss, the impeller inlet section is filled with uniform air flow.
Bearing box: Install bearing, fill lubricant.
风机工作原理
当离心式风机的叶轮被电动机带动旋转时，充满于叶片之间的气体随同叶轮一起转动。在离心力的作用下，气体从叶片间槽道甩出，并将气体由叶轮出口处输送出去。当气体的外流造成叶轮空间形式真空，外界的气体就会自动进入叶轮补充。由于风机的不停工作，将气体吸进压出，形成了气体的连续流动，从而形成了连续的工作。送引风机从风机的角度而言没有区别，都是由电动机带动风机的扇页旋转产生风，虽然比电扇要复杂些，但本质上没有区别。引送风机的作用不同是由他们安装的部位决定的，前者位于锅炉的后端，向锅炉外的烟道鼓风，对炉膛产生负压，对烟气起导引作用，所以叫引风机；后者相反位于锅炉的前端，向锅炉内鼓风，所以叫送风机。
Working Principle of Fan
When the impeller of a centrifugal fan is driven by a motor, the gas filled between the blades rotates with the impeller. Under the action of centrifugal force, the gas is thrown out from the slot between the blades and is transported out from the outlet of the impeller. When the outflow of gas causes the vacuum in the impeller space, the outside gas will automatically enter the impeller to supplement. Because of the continuous work of the fan, the gas is sucked in and out, forming a continuous flow of gas, thus forming a continuous work. From the perspective of fans, there is no difference between forced draft fans and induced draft fans. All of them are driven by motors to rotate the fan pages to generate wind. Although they are more complex than electric fans, they are essentially no difference. The function of induced draft fan is different from that of the parts they install. The former is located at the back end of the boiler and blows out the flue, which produces negative pressure on the furnace and guides the flue gas, so it is called induced draft fan, while the latter is located at the front end of the boiler and blows in the boiler, so it is called forced draft fan.
噪声治理技术
锅炉房的鼓风机和引风机噪声一般在90分贝左右，因输送的锅炉烟气温度高达180℃，采用封闭隔声会导致散热不良，电机温度过高，甚至烧毁电机。因此，在工艺上将风机降噪和节能两方面结合起来 [3] 。
经实践，锅炉风机节能降噪综合治理方案为：对锅炉房的工艺布置保持不变，将鼓风机、引风机分别置在隔声室内，用通风管将它们与主机相连接，在隔声室顶上或墙面上开设进气口，并安装消声器供机房进风使用。平面布置时将鼓风机靠近锅炉房一侧，进风口在上风侧，电机置于气流通道中间。
锅炉运行时，由于鼓风机在隔声室内产生负压，大量的室外新鲜空气就会自动进入隔声室，首先和引风机电机进行热交换，使之冷却降温，室内温度保持50℃左右。
Noise control technology
The noise of blower and induced draft fan in boiler room is generally about 90 decibels. Because the flue gas temperature of the conveying boiler is as high as 180 C, the use of enclosed sound insulation will lead to poor heat dissipation, motor temperature is too high, and even burn down the motor. Therefore, the noise reduction and energy saving of the fan are combined in the process.
Practice shows that the comprehensive treatment scheme for energy saving and noise reduction of boiler fans is to keep the technological arrangement of the boiler room unchanged, place the blower and induced draft fan in the sound insulation room respectively, connect them with the main engine by the ventilation pipe, open air intake on the top or wall of the sound insulation room, and install mufflers for the use of the air intake of the engine room. In the plane arrangement, the blower is close to the side of the boiler room, the air inlet is on the upper side, and the motor is placed in the middle of the air passage.
When the boiler is running, because the blower produces negative pressure in the sound insulation chamber, a large number of outdoor fresh air will automatically enter the sound insulation chamber. First, heat exchange with the induction fan motor will make it cool down, and the indoor temperature will be maintained at about 50 degrees Celsius.