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    客户使用离心风机选型一般方法步骤?怎么选择

    2018-12-20 08:49:26 无锡盛发地坪科技有限公司 阅读

    1. 在选择离心风机前,应了解国内离心风机的生产和产品质量情况,如生产的离心风机品种、规格和各种产品的特殊用途,新产品的发展和推广情况等,还应充分考虑环保的要求,以便择优选用风机
    1. before selecting the centrifugal fan, we should understand the production and product quality of the domestic centrifugal fan, such as the variety, specification and special use of various products, the development and popularization of new products, and the requirements of environmental protection should be taken into consideration so as to choose the fan.

    2. 根据离心风机输送气体的物理、化学性质的不同,选择不同用途的离心风机。如输送有爆炸和易燃气体的应选防爆离心风机;排尘或输送煤粉的应选择排尘或煤粉离心风机;输送有腐蚀性气体的应选择防腐离心风机;在高温场合下工作或输送高温气体的应选择高温离心风机等。
    2. according to the different physical and chemical properties of centrifugal fans, choose different types of centrifugal fans. For example, a centrifugal fan should be selected for explosion and flammable gas; dust or pulverized coal should be selected for dust or pulverized coal centrifugal fan; corrosion resistant centrifugal fan should be selected for transporting corrosive gases; high temperature centrifugal fan should be selected for working or transporting high temperature gas at high temperature.

    3. 在离心风机选择性能图表上查得有二种以上的离心风机可供选择时,应优先选择效率较高、机号较小:调节范围较大的一种,当然还应加以比较,权衡利弊而决定。
    3. when there are more than two centrifugal fans on the centrifugal fan selection performance chart, more than two kinds of centrifugal fans can be selected for selection, it should be preferred to choose higher efficiency and smaller number of machines: a larger adjustment range, which should be compared and weigh the advantages and disadvantages.

    4. 如果选定的风机叶轮直径较原有风机的叶轮直径偏大很多时,为了利用原有电动机轴、轴承及支座等,必须对电动机启动时间、风机原有部件的强度及轴的临界转速等进行核算。
    4. if the diameter of the selected fan impeller is much larger than the diameter of the original fan, in order to make use of the original motor shaft, bearing and support, the starting time of the motor, the strength of the original parts of the fan and the critical speed of the shaft must be calculated.

    5. 选择离心式离心风机时,当其配用的电机功率小于或等于75KW时,可不装设仅为启动用的阀门。当排送高温烟气或空气而选择离心锅炉引风机时,应设启动用的阀门,以防冷态运转时造成过载。
    5. when a centrifugal fan is selected, when the motor power is less than or equal to 75KW, no valve can be installed for start-up. When the high temperature flue gas or air is discharged and the centrifugal boiler induced draft fan is selected, a starting valve should be set up to prevent overload during cold running.

    6. 对有消声要求的通风系统,应首先选择效率高、叶轮圆周速度低的离心风机,且使其在最高效率点工作;还应根据通风系统产生的噪声和振动的传播方式,采取相应的消声和减振措施。离心风机和电动机的减振措施,一般可采用减振基础,如弹簧减振器或橡胶减振器等。
    6. for the ventilation system with the requirement of noise elimination, the centrifugal fan with high efficiency and low circumferential velocity of the impeller should be selected first, and it works at the highest efficiency point, and the corresponding noise reduction and vibration damping measures should be taken according to the transmission mode of noise and vibration produced by the ventilation system. Vibration damping measures such as spring damper or rubber shock absorber are generally adopted for centrifugal fans and motors.

    7. 在选择离心风机时,应尽量避免采用离心风机并联或串联工作。当不可避免时,应选择同型号、同性能的离心风机联合工作。当采用串联时,第一级离心风机到第二级离心风机之间应有一定的管路联结。
    7. when selecting a centrifugal fan, it is important to avoid using centrifugal fans in parallel or in series. When it is unavoidable, we should choose the same type and homosexual centrifugal fans to work together. When connected in series, the first stage centrifugal fan should have certain pipe connection between the second centrifugal fans.

    8. 所选用的新风机应考虑充分利用原有设备、适合现场制作安装及安全运行等问题。 

    8. the new fans should be considered to make full use of existing equipment, suitable for on-site production, installation and safe operation.

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