​​​​​​​Hydraulic fan manufacturer: Introduction to blower product classification

Hydraulic fan manufacturer: Positive displacement blower, which is a type of rotary blower. It uses two convex rotors or three convex rotors to transport gas relative to each other in the cylinder. Due to the continuous rotation of the rotor, the pumped gas is sucked into the air between the rotor and the pump casing through the inlet, and then discharged through the outlet. The gas did not pass through the internal compression process of the Roots fan.
Hydraulic fan manufacturer: Positive displacement blower is a common blower in small and medium-sized sulfuric acid plants. When the required air volume is small, centrifugal blowers are often not suitable due to the small impeller diameter, and it is generally difficult to achieve the pressure head required for sulfuric acid production at a speed of 2950 rpm. It has the advantages of both Reciprocating compressor and centrifugal blower. It has a Reciprocating compressor that the air pressure changes very little when the rotating speed is constant, and the air supply volume can be kept constant, that is, the proportional relationship between rotating speed and air volume can be maintained.
Hydraulic fan manufacturer: It also has the advantages of high speed centrifugal blower, no need for air valve and crankshaft, light weight, and convenient use. The disadvantage is that when the outlet is blocked, the pressure will rise, and even the machine itself will be damaged. Over time, the gap between the two rotors and the gap between the rotor and the casing have become larger, resulting in a decrease in air supply.
Hydraulic fan manufacturer: Currently, all blast furnace blowers use blade fans, mainly centrifugal and axial flow. Centrifugal blowers have the advantages of simple structure, reliable operation, high design efficiency, and low noise. We have mature manufacturing and application experience in China, and blast furnaces below 400m3 are widely used in underdeveloped industrial areas and countries. However, with the large-scale development of blast furnaces, the adjustment loss, overall size, and weight of centrifugal blowers have greatly increased, bringing great difficulties to manufacturing, transportation, installation, and maintenance.
Hydraulic fan manufacturer: At the same time, it is also constrained by factors such as the material strength of the rotating impeller, spindle stiffness, and motor startup, which reduces the reliability and economy of the fan. Axial flow blower is widely used in large-scale and modern blast furnaces due to its advantages of compact structure, small volume, light weight, good load regulation, wide application range, small Moment of inertia of blower, easy starting of motor, etc. Axial flow blowers are widely used in blast furnaces with a capacity of over 500m3 and have accumulated certain experience in manufacturing and operation.
Hydraulic fan manufacturer: magnetic suspension blower is a turbine with magnetic bearing. Its main structure is that the blower impeller is directly installed at the extended end of the motor shaft, and the rotor is vertically suspended on the active magnetic bearing controller, so that it can be directly driven by a high-speed motor without the need for a booster or coupling. The core of a single stage high-speed centrifugal blower controlled by a frequency converter is magnetic bearing and permanent magnet motor technology.