Current location: home page > news information > Roots blower information

What about the positive and negative rotation of Roots blower? Is there any positive and negative rotation of Roots blower?

Source: Roots blower manufacturer Published on: December 9, 2021-12 Hits:

What about the positive and negative rotation of Roots blower?

During the operation of Roots blower, it is necessary to frequently check the bearing, lubricating oil temperature and current indication value. When the blower needs cooling water, it is necessary to check whether the cooling water volume meets the specified requirements. When the blower packing seal is sealed, it is also necessary to check the seal leakage. When the leakage is serious, it is necessary to immediately replace the seal to avoid safety accidents caused by dangerous gas leakage, and corrosion gas leakage will also damage the bearing.

When the Roots blower stops, it must be depressurized and load reduced before it stops. When the blower stops with load or because of sudden power failure, the high-pressure gas in the system at the outlet side of the blower will quickly flow to the inlet side of the low blower (that is, generally speaking, backflow will occur), which will cause the high-pressure gas to drive the blower impeller to accelerate and reflect the operation. When the impeller speed reaches its speed, the impeller will collide with the casing Breaking vicious accidents, especially fertilizer plants and other users transporting flammable and explosive gases should be strictly operated because the fan impeller is broken, which is often accompanied by more dangerous accidents such as * * fire.

The reverse rotation of Roots blower is because the rotation direction of the impeller is opposite to the direction of the rotating magnetic field of the motor nail, the starting current is larger, and the inertia of the impeller is much larger than that at rest, which makes the starting current and time of the blower exceed the action current and time set by the current relay for the safety of the motor, so the reverse fan cannot be started. To start the reversing Roots blower, first stop the reversing impeller, for example, add a barrier at the inlet of the reversing blower, or use external force to stop the rotation of the impeller before starting.

Roots blower is not allowed to reverse suddenly under the condition of positive transmission. Sudden power failure of the fan or reverse rotation of the fan caused by the pressure at the outlet, forward inertial rotation and outlet backpressure may damage the fan gear and coupling. In serious cases, the rotor or the whole fan may be damaged. In the past, the reversing rotor of the fan of the second leaf will be broken immediately, and the gear of the Roots blower will also be broken.

What about the positive and negative rotation of Roots blower? Does Roots blower have positive and negative rotation?

Does Roots blower have positive and negative rotation?

Generally, Roots blower can be reversed, but it will start when the blower stops. In case of long-term reverse operation, the fan shall be adjusted for the front and rear end clearance before leaving the factory. Sudden power failure of the fan or reverse rotation of the fan caused by pressure return of the air outlet, forward inertial rotation and outlet back pressure may break the fan gear and coupling, or even the rotor or the whole fan may be damaged in serious cases. Therefore, it is generally required to disconnect from the original pipe before reversing, and the reversing can only be performed after the fan is completely stopped. When the fan is powered off and trips, the rotor and coupling are always broken. It is better to install a check valve in front of the fan outlet or at the fan outlet to prevent the impact of back pressure in the pipeline on the fan itself.

The solution to the reverse rotation of Roots blower is to install a check valve and ensure that the check valve can be closed safely. Generally, Roots blower can be reversed, but it must be started when the blower stops. In case of long-term reverse operation, the fan shall be adjusted for the front and rear end clearance before leaving the factory. For the fan blade reversal caused by sudden power failure, the Roots blower tripped after power failure, and the rotor and coupling were always damaged. The solution is to install a check valve in front of the fan outlet or at the fan outlet to prevent the back pressure in the pipeline from affecting the roots fan itself.

Text label: Roots blower

Article address: //wuhanzhcs.com/html/news/n02/827.html

Previous: Common wear faults of Roots blower components:

Next: What should be paid attention to during installation of Roots blower during maintenance:

Back to list