Centrifugal fan industry development prospects
The development direction of centrifugal fans is high capacity, high pressure, compact structure, low energy consumption, low noise, high efficiency, good plasticity, high efficiency, low noise, high efficiency, low noise design, greatly save the installation, foundation and debugging cost, improve the accuracy of the product design, application of centrifugal fan thermodynamics, dynamics calculation software and its working process simulation software, and improve the success rate of new product development. Compared with this kind of foreign high technology, it is clear that we have a lot of shortcomings.
design theory, design methods are relatively backward, product development is the use of imitation and analogy method, a serious lack of theoretical basis and experimental research data, processing equipment and technology level is relatively backward, low processing accuracy, low efficiency, product serialization and general degree is not high, the variety of specifications, pump efficiency, sealing performance, corrosion resistance and other aspects compared with foreign products, there is a very big gap.
the centrifugal force balance machine is different from the supporting characteristics, and can be divided into the soft and the hard bearing balancing machine. The balancing speed is higher than the natural frequency of the rotor bearing system. The support stiffness of the balancing machine is small, and the signal of the sensor is proportional to the vibration displacement of the support. The balance rotation speed is lower than the natural frequency of the rotor support system, which is a hard bearing balancing machine. The support stiffness of the balancing machine is large, and the signal of the sensor is proportional to the vibration force of the support.
& nbsp; & nbsp; according to the blades of the impeller mounting direction can be division of centrifugal fan impeller for tilt centrifugal impeller and the forward curved centrifugal impeller. According to the structure of the impeller can be divided into the impeller and the impeller divided into a number of wing type impeller and two kinds of sub. According to the motor installation needs can be divided into the outer rotor impeller and inner rotor impeller.
centrifugal fan is the auxiliary production equipment, mainly used in the ventilation and dust removal device, such as stone cutting and polishing process of cyclone dust collector and bag filter, etc..
centrifugal fan is a variable flow constant pressure device. When the speed is constant, the pressure flow theory curve of the centrifugal fan should be a straight line. Due to internal losses, the actual characteristic curve is curved. The pressure generated by the centrifugal fan is influenced by the change of the inlet temperature and the density. For a given amount of air, the pressure at the highest intake temperature is lowest. For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower is running at constant speed, the power required for a given flow increases with the increase of the inlet temperature.
