How to adjust the air volume of Roots blower?
2021-07-14
Summary
Roots blower has simple structure and convenient manufacture. It is widely used in aquaculture aeration, sewage treatment aeration, cement transportation. It is more suitable for gas transportation and pressurization systems in low-pressure situations, and can also be used as a vacuum pump. How to adjust the air volume of the roots blower today?
Roots blower has simple structure and convenient manufacture. It is widely used in aquaculture aeration, sewage treatment aeration, cement transportation. It is more suitable for gas transportation and pressurization systems in low-pressure situations, and can also be used as a vacuum pump. How to adjust the air volume of the roots blower today?
1. Adjust the motor speed
The higher the fan speed, the greater the flow, which must be understood by everyone. In unit time, the more air compressed by the Roots blower, the greater the flow.
2. Adjust the motor frequency converter
In fact, what is changed by adjusting the frequency converter is the rotation speed, so the principle is the same as that of noodles. Among them, adjusting the belt or pulley to change the air volume, the principle is the same, all have an impact on the speed, and then affect the air volume.
3. Adjust the bypass valve
The valve can adjust the loss of the air volume of the fan. The larger the opening, the more air leaks, the air volume will decrease, and the smaller the bypass valve is opened, the less gas leaks, and the greater the air volume.
2. wrong air volume adjustment posture
1. Adjust the outlet valve or pipeline
After the Roots blower is installed, the air volume cannot be adjusted by adjusting the outlet valve and pipeline. The reason is that if the outlet pipeline or valve is adjusted, the negative pressure of the Roots blower will change, which will affect the normal use of the fan. Excessive pressure may cause damage to the motor.
2. Adjust the fan "blade"
In the Roots fan industry, the "blade" of the fan is called "impeller", while the word "blade" is mostly used in the centrifugal fan industry. As long as the blade is mentioned in the Roots fan industry, most of it comes from tampering with the technical data of the centrifugal fan. The reason is that the working principle and structure of the centrifugal fan are completely different. The fan blade of the centrifugal fan is flake, while the rotor of the Roots fan is in the form of the wheel.
3. Intake air flow regulation
For air intake flow adjustment, some people have proposed to adjust the air volume by changing the air inlet, but the air volume of the Roots blower is adjusted to a small sealed silencer. If the air volume is adjusted to a large amount, how should it be adjusted? Roots blower can be increased by two-stage series connection, which is completely feasible. However, the structure of single-stage Roots blower and double-stage Roots blower is very different. Adjusting the air volume to reduce the air volume will cause waste of resources. Therefore, it is unreasonable to adjust the air volume by adjusting the Roots blower. If it is reasonable, the fan can only be replaced.
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