Causes and solutions for reverse rotation of Roots blower? This article tells you!

Why Roots blower reverses? This article tells you!

Roots blower can not reverse under normal conditions. During the trial run, check whether there is a restaurant, and make sure there is no problem in turning before starting.

According to the previous working experience, the Roots blower manufacturer explained the reasons for the reverse rotation of the Roots blower:

① The reverse rotation of Roots blower is because the rotation direction of the impeller is opposite to the rotation magnetic field direction of the motor nail, the starting current is large, and the inertia of the impeller is much larger than that at rest. Therefore, the starting current and time of the fan exceed the current relay to ensure that the working current and time set safely by the motor cannot start the reverse fan.

Solution: To start the reversible roots blower, first stop the reversible impeller, for example, add a baffle at the inlet of the reversible fan, or use external force to stop the impeller and then start it.

② The solution to reverse rotation of Roots blower is to install a check valve and ensure that the check valve can be closed safely. Normally, roots blower can be reversed, but it must be started when the fan stops. If the roots blower runs in the opposite direction for a long time, it is necessary to adjust the clearance between the front end and the rear end of the roots blower before leaving the factory. If the fan blade reverses due to sudden power failure, the roots blower trips after the power failure, which will cause the rotor and coupling to always be damaged.

Solution: 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 blower itself.

Under normal circumstances, roots blower can be reversed, but it will start when the blower stops. If the fan runs in the opposite direction for a long time, it is necessary to adjust the gap between the front end and the rear end before leaving the factory. If the fan suddenly loses power or returns to the seat due to the pressure at the air outlet, the forward inertial rotation and outlet back pressure will cause the fan to reverse, and cause damage to the fan gear and coupling. In serious cases, the rotor or the entire fan may be damaged. Therefore, it is usually necessary to reverse the original pipe after it is disconnected, and it must be reversed after the fan is completely stopped. When the fan is powered off and tripped, the rotor and coupling are always damaged. A check valve should be installed in front of the fan outlet or at the fan outlet to prevent the back pressure in the pipeline from affecting the fan itself.

The above is the reason and solution for the reverse rotation of Roots blower. I hope it can help you. Xinqianshun Roots blower manufacturer welcomes your consultation: 0531-83663588.