Urban sewage through drainage pipeline to the sewage treatment plant，Drunk fan as one of the sewage treatment equipment，Its importance is self-evident，How much do you know about the blower??
1、Roots、Roots drum fan works
Roots fan is a fixed-volume fan，The air volume of the conveyor is proportional to the number of revolutions，Three-leaf impeller rotation once2Impeller3Secondary suction、Exhaust，Compared with two-leaf type，Gas pulsation becomes less，Small load change，High mechanical strength，Low noise，Vibration is also small。In2The root plane is equipped with2Trioplastic impeller，Wheel and elliptical chassis in the perforated surface and each of the three leaves have always maintained a small gap，Since the impeller is uniformly rotated in the opposite direction，A certain amount of gas surrounded by the casing and the impeller is conveyed from one side of the drawn to the discharged side.。Each of the impellers is always the correct phase by the synchronous gear.，No mutual touch phenomenon，Therefore, it can be high speed，No internal lubrication，And the structure is simple，Standing operation，Performance stability，Adapt to a variety of uses，Applicable to a wide range。
2、Working principle of centrifugal blower(同 同 心 泵)
When the motor rotates the wind turbine rotation，The gas between the blades in the impeller is also rotating.，And take out these gases under the action of centrifugation，Gas flow rate，Make the gas in the flow to convert kinetic energy into static pressure，Then as the fluid boost，Make the static pressure to convert to speed，Exhaust gas via exhaust port，In the middle of the impeller, a certain negative pressure is formed.，Since the entrance is negative，Immediately replenish the external gas under the action of atmospheric pressure，Continuously discharge and replenish the gas under the continuous rotation of the impeller，Thus the purpose of continuous blowing。Equivalent power，Wind pressure and air volume are generally inverse。Equivalent power，Wind pressure，The air volume is relatively low，And the air volume is large，Wind pressure will be low，This will make full use of the power efficiency of the motor.。
3、Rotary blower structure and working principle
Air blower pressure range:0.1-0.5kgf/cm2Rotary blower structure，Mainly consisting of the following six parts:Motor、Air transitioner、Blower body、Air chamber、Base(Gold)、Drip mouth。The blower biased in the cylinder eccentric operation，And make the rotor slot4The volume change between the blanks will be inhaled.、compression、Spit out。The pressure difference of the blower is automatically sent to the dripper mouth in the operation of the blower.，Drop into the cylinder to reduce friction and noise，At the same time, keep the gas in the cylinder do not return.。
4、Centrifugal blower structure and working principle
Squeezing force of rotating blade makes fluid to achieve energy，Rising its compaction and kinetic energy，The structure is shown in the figure。impeller1Installed in cylindrical(Fan is conical)Pump shell3Within，When the impeller is rotated，Fluid axis，After obtaining energy in the blade leaves，Along the axial flow。
Centrifugal blower、Roots Blower、The difference between the characteristics of the rotary fan
1)If the load is required to be a constant flow effect, use a Roots blower.。Because Roots brought a constant current fan，The main parameter of the work is the air volume，The pressure of the output varies with the change of the pipeline and the load，Virtual volume changes very small。This is also one of the reasons why Roots blowers are increasingly favored by users.。Roots fan is a high pressure fan，Roots blower is a bulk fan，The air volume of the conveyor is proportional to the number of revolutions，Transfer the gas from one side of the inhalation to the side of the discharge。
Use a centrifuge fan if the load is required is a constant voltage effect.。Because the centrifugal fan belongs to the constant pressure fan，The main parameter of the work is wind pressure，The output of the output varies with the change of the pipeline and load，Wind pressure changes。Centrifugal fan，Wind pressure is not large。The compression process of air is usually several working impellers(Or a few levels)Conducted under the action of centrifugal force。Cardinal fan belongs to square torque characteristics，Roots filling is basically constant torque characteristics。
2)Roots blowers generally come to the air volume，Stress is also relatively large，The same Roots fan noise is also very large。
If the air volume is required，Highly high noise requirements，Use rotary blower，Rotary blower also belongs to a constant current fan，The main parameter of the work is the air volume，The pressure of the output varies with the change of the pipeline and the load，Virtual volume changes very small，Rotary fan is becoming compression， Its main feature is:Low speed，low noise，Low vibration，high efficiency，High energy saving。
Axial Fan(Blade)The main feature is also a constant wind pressure，When pressure changes or barriers in the pipeline，It will automatically adjust the air volume to ensure the constant wind pressure.。Axial flow pump and fan suitable for large flow、Low pressure，Power plant is often used as a circulating water pump and the air blower。my country's centrifugal blower is not much experience，Especially large centrifugal blowers still need to be improved，When you use it, you should work closely with the manufacturer.。