The common solution to the low pressure of Roots blower is to replace a larger motor, but the flow may decrease, so it is generally necessary to increase the speed. The pressure of Roots blower is not the pressure generated by Roots blower, but the pressure it can load. The low pressure of Roots blower is actually the insufficient pressure and force under the normal operation of the blower. If forced use, the motor will be damaged. Therefore, if you want to increase the pressure, you must replace the powerful and high-power motor.
To change the pressure required by the system is simply to change the diameter of the outlet of Roots blower. Large pressure drop, small pressure rise. The pressure relief valve can be installed on the blower. The pressure relief valve can accurately and maintain the constant safe and stable pressure. Once overpressure occurs, the pressure relief valve can be fully opened to relieve pressure in time.
Adjust the clearance of Roots blower. When installing, put the feeler gauge between the impellers, and then install the gear. During gear installation, change the feeler gauge between each contact surface of the impeller to keep the clearance consistent. There is a small gap between the cylinder and rotor of Roots blower, which is usually a few tenths of a millimeter. Since they do not rub against each other, they can run at high speed to obtain large air volume or exhaust speed. Because the inner cavity of Roots blower does not need lubricating oil, it has simple structure, stable operation and stable performance, and is suitable for many purposes.
Since the wind pressure of Roots blower is not limited by the fan speed, the wind pressure can remain unchanged no matter how the speed changes. The air volume is in direct proportion to the fan speed. Within a certain pressure range, the pressure changes with the system, and the pressure changes with the system resistance, which is adaptive; It has the hard exhaust characteristic of forced gas transmission, that is, when the pressure changes, the flow changes little.
The operation of Roots blower varies. How to change the pressure of the fan when the flow remains unchanged? People in the industry who have some knowledge of the performance of Roots blower will know that the rotating speed of Roots blower will not interfere with the wind pressure of the blower, that is, no matter how the rotating speed changes, the wind pressure of the equipment can remain unchanged. The fan speed is proportional to the air volume, that is, the larger the air volume, the higher the fan speed.
The operating pressure of Roots blower is subject to the pipeline resistance under working conditions, that is, the greater the pipeline resistance, the greater the operating pressure of blower, and vice versa. Therefore, Roots blower can automatically adjust the pressure, and the pressure fluctuates according to the actual resistance of the customer's pipeline. This tells us that in the selection of Roots blower, we must make clear what the maximum resistance of Roots blower is and what the air volume is under the working condition, so that in the actual selection, we will take the maximum pressure as the criterion, and under the condition of meeting the air volume required by the customer, we will make the belt pulley of blower and electric motor to fit the appropriate motor.
The pressure characteristics of Roots blower mainly include the following aspects: within a certain pressure range, the change of the system affects the pressure.
① The pressure of equipment is adaptive and changes with the change of system resistance.
② When the pressure changes, the flow changes slightly, because Roots blower has the exhaust characteristic of forced gas transmission.
According to the above characteristics, we can change the pressure of the fan in the following ways.
① To change the pressure required by the system, simply say: change the diameter of the air outlet. Large pressure drop, small pressure rise.
② Adjust the operating clearance of the equipment.
③ Install a pressure relief valve on the equipment.
I believe that after reading the above, you should also know whether Roots blower can automatically adjust the pressure. I hope it will help you.
Text label: Roots blower
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