Research on the working principle of stainless steel centrifugal fan

玻璃钢离心风机顾名思义是一种外壳用不锈钢防腐蚀材料制造的离心风机，工作原理是当电机转动带动风机叶轮旋转时，叶轮中叶片之间的气体也跟着旋转，并在离心力的作用下甩出这些气体，气体流速增大，使气体在流动中把动能转换为静压能，然后随着流体的增压，使静压能又转换为速度能，通过排气口排出气体，而在叶轮中间形成了一定的负压，由于入口呈负压，使外界气体在大气压的作用下立即补入，在叶轮连续旋转作用下不断排出和补入气体，从而达到连续鼓风的目的。 同等功率下，风压和风量一般程反比。 同等功率下，风压高，风量就会相对低，而风量大，风压就会低些，这样才能充分利用电机的功效率。

The centrifugal fan, as its name implies, is a centrifugal fan made of stainless steel anticorrosive material in the shell. The principle of the centrifugal fan is to rotate the gas between the blades in the impeller when the motor turns and drives the fan impeller, and the gas is flung out under the action of the centrifugal force. The gas flow rate increases and the gas is flowing in the flow. The kinetic energy is converted to the static pressure energy, and then with the pressure of the fluid, the static pressure can be converted to the velocity energy, and the gas is discharged through the exhaust port, and a certain negative pressure is formed in the middle of the impeller. Because the inlet is negative pressure, the external gas is filled in at the pressure, and it is continuously discharged and mended under the continuous rotation of the blade wheel. Into the gas, so as to achieve the purpose of continuous blast. Under the same power, the wind pressure and air volume are generally inversely proportional to each other. Under the same power, high wind pressure, wind volume will be relatively low, and wind volume, wind pressure will be lower, so as to make full use of the efficiency of the motor.

随着风机的用途不同，要求也不一样，如公共建筑所用的风机一般用来作通风换气用，一般最重要的要求就是低噪声，多翼式离心风机具有这一特点；而要求大流量的柜式离心风机通常为双吸气型式；对一些高压离心风机，比转速低，其泄漏损失的相对比例一般较大。

As the use of the fan is different, the requirement is different, for example, the fan used in the public building is generally used for ventilation and ventilation. The most important requirement is the low noise. The multi wing centrifugal fan has this characteristic, and the high flow cabinet centrifugal fan is usually double suction type, and some high pressure centrifugal fans are compared. The relative loss of leakage is relatively large.

柜式离心风机设计时通常给定的条件有：容积流量、全压、工作介质及其密度(或工作介质温度)，有时还有结构上的要求和特殊要求等。对柜式离心风机设计的要求大都是：满足所需流量和压力的工况点应在最高效率点附近；最高效率值要尽量大一些，效率曲线平坦；压力曲线的稳定工作区间要宽；风机结构简单，工艺性好；材料及附件选择方便；有足够的强度、刚度，工作安全可靠；运转稳定，噪声低；调节性能好，工作适应性强；风机尺寸尽可能小，重量轻；操作和维护方便，拆装运输简单易行。

The design conditions of the cabinet type centrifugal fan are usually given in terms of volume flow, full pressure, working medium and its density (or working medium temperature), sometimes there are structural requirements and special requirements. Most of the requirements for the design of the cabinet type centrifugal blower are that the working point of satisfying the required flow and pressure should be near the highest efficiency point; the maximum efficiency value should be as large as possible, the efficiency curve is flat; the stable working interval of the pressure curve should be wide; the fan structure is simple and the craft is good; the selection of material and accessories is convenient; it has enough strength. Degree and stiffness, safe and reliable work, stable operation, low noise, good adjustment performance, strong adaptability to work, small size of the fan, light weight, convenient operation and maintenance, easy transportation and transportation.