The outlet pressure of a Roots blower is a key operating parameter that determines how far the blower can transport gas and how much resistance it can overcome. The following is a detailed analysis of the outlet pressure of Roots blower:
1、 Export pressure range
The outlet pressure of Roots blowers usually fluctuates within a certain range, which is influenced by various factors. Generally speaking, the outlet pressure range of Roots blowers is as follows:
1. Common range: between 0.10.2kgf/cm2 (or 0.10.2MPa, i.e. megapascals), which is the outlet pressure range of Roots blowers in general applications.
2. Customizable range: The outlet pressure of Roots blower can be customized and adjusted according to specific process requirements. In some special applications, such as cleanrooms or fields, higher outlet pressure may be required to ensure air cleanliness; In industries such as power and chemical, it may be necessary to adjust pressure to meet the processing requirements of specific processes. Therefore, the outlet pressure range of Roots blower can be expanded to 0.1~1.5 MPa or higher.
2、 Factors affecting export pressure
The outlet pressure of Roots blower is affected by various factors, mainly including the following aspects:
1. Fan speed: The higher the speed, the greater the pressure generated. When the speed increases, the impeller rotation speed increases, and the frequency of gas compression and pushing increases, resulting in an increase in pressure.
2. The shape and size of impellers: impellers of different shapes and sizes have different compression and pushing effects on gases. Larger sized or specifically shaped impellers may generate higher pressure.
3. Design of import and export: Reasonable import and export design can optimize the flow of gas, thereby affecting the generation of pressure.
4. System resistance: The outlet pressure of Roots blower varies with the change of system resistance and has adaptability. When the system experiences resistance, the outlet pressure will also correspond.
3、 Methods for adjusting export pressure
1. Replacing the motor: If the pressure of the Roots blower is low, a larger motor can be replaced to increase the speed and thus increase the outlet pressure. However, it should be noted that replacing the motor may result in a decrease in flow rate, so the selection needs to be based on actual needs.
2. Changing the diameter of the air outlet: The size of the air outlet diameter will affect the outlet pressure of the Roots blower. The larger the caliber, the lower the pressure; The smaller the caliber, the higher the pressure. Therefore, the outlet pressure can be adjusted by changing the diameter of the air outlet.
3. Installing a pressure relief valve: Installing a pressure relief valve on a Roots blower can accurately and consistently maintain a stable pressure. Once overpressure occurs, the pressure relief valve can fully open and release pressure in a timely manner, thereby protecting the fan from damage.
4. Adjusting fan clearance: When installing a Roots blower, the outlet pressure can be changed by adjusting the clearance between the impellers. The smaller the gap, the higher the pressure; The larger the gap, the lower the pressure. However, it should be noted that the adjustment of the gap should be carried out under the premise of ensuring the normal operation of the fan.
In summary, the outlet pressure of Roots blower is an important operating parameter that is influenced by various factors and can be adjusted to adapt to different application scenarios. When using a Roots blower, it is necessary to select the appropriate equipment model according to actual needs and operate and maintain it according to the technical parameters in the equipment manual to ensure the normal operation and service life of the equipment.
