Roots blower is mainly composed of casing, impeller, wallboard and inlet and outlet silencers. The casing is mainly used as support and fixation, wallboard is used to connect the casing and impeller, and support the rotation of the impeller. The impeller is mainly the rotating part of Roots blower, which is characterized by low noise and smooth operation, The silencer is used to reduce the noise of Roots blower.
Roots blower is a kind of positive displacement fan, which mainly rotates in an involute way, and the three blades in the fan are identical, which can maintain a certain minimum clearance during rotation, resulting in a vacuum state at the air inlet. The blades form a sealing chamber with the wallboard and casing, which can form a continuous work.
1. Pressure
As long as fans are involved, pressure parameters will be involved. Roots blower is different from other types of fans. The pressure parameter of Roots blower is to overcome the resistance of the pipeline, which is often referred to as the back pressure in the industry. This pressure parameter is the main parameter in the selection, and it can provide accurate pressure parameters as much as possible.
2. Flow
The flow is the air volume, usually in cubic meters per minute or cubic meters per hour. The flow parameter of Roots blower refers to the volume of gas transported per unit time under standard conditions.
The calculation formula is as follows:
Q (inlet)=Q (outlet) × density of outlet gas (kg/m3)/density of inlet gas (kg/m3)
Q (in) = q (out) × density of outlet gas (kg / m3) / density of inlet gas (kg / m3)
Convert the flow Q (standard, m3/h, normal temperature and pressure) in the standard state into the intake flow Q (inlet, m3/min), which can be calculated according to the following formula:
Q (inlet) ＝ Q (standard) × P (absolute pressure of inlet gas, Pa)/(P (absolute pressure of inlet gas, Pa) - S (relative humidity) × P (saturation pressure of water vapor, Pa)) × T (thermodynamic temperature of inlet gas, K)/273
Note: Standard state: 0 ℃, 0.1MPa dry state
3. Power
Roots blowers produced by each brand are different, so the power of each Roots blower is different. In Roots blower industry, power refers to shaft power. The higher the shaft power, the higher the efficiency. The lower the shaft power, the greater the loss and consumption. When selecting Roots blower, if there are certain requirements for shaft power, they should be marked in the purchase technical agreement. 4. Media
4. Media
Roots blower can only transport clean air, and the transmission medium is mainly air. With the continuous innovation of technology, the current Roots blower can also transport gas such as gas and biogas, but it needs special treatment. It should be noted here that the conveying medium here refers to the gas substances passing through the roots blower, which can also be used in the dust removal industry, but the dust will not pass through the roots blower. The roots blower in the dust removal industry only provides the air source power for the dust, so we should make a distinction here.
When selecting the type of Roots blower, if the gas medium conveyed contains water gas, oil gas, toxic gas, etc., it needs to be noted. Special treatment must be carried out for the transmission of special gas before the Roots blower can be used.
5. Density
5. Density
The density parameter is rarely mentioned in the selection of Roots blower, but another parameter related to density is often heard: altitude, high altitude area, low gas density, low altitude area, high gas density. When selecting Roots blower, if we are in plateau area or basin area, the density parameter will play a role in the selection, The specific model parameters must be determined according to the gas density.
I believe that after reading the above contents, you should also have a better understanding of the technical parameters of Roots blower. I hope it will be helpful to you.
Text label: Roots blower
Link to this article: //wuhanzhcs.com/html/news/n02/604.html
