Reactor operation status
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Our company's 2000L reactor has always been equipped with paddle-type stirring and a 1/11 reducer. Now due to process requirements, anchor-type stirring is required and is equipped with a 1/17 reducer. The vibration is large during use. Please discuss the reasons.
Is the stirring well balanced? Is the stirring shaft deformed?
Then add: 1. If the rotation speed of the stirring shaft is high, the natural vibration will increase. ； 2. Check the coordination between the mixing shaft and the transmission shaft to see if it meets the requirements. ； 3. Check the condition of the transmission shaft bearing and see if it needs cleaning, maintenance, or replacement. For reference!
The stirring speed is low, but it is anchor stirring. The transmission and bearings are in good condition, but the entire reactor vibrates greatly during operation. It definitely has something to do with the mixing method.
The quality of some mixers now is not up to standard, and the threaded connections are not concentric. It may be better to replace them with another one.
It should be said that the stirring speed has been reduced and the stirring form has changed. The weight of the anchor-type stirring blades is relatively concentrated at the bottom of the stirring shaft (the paddle-type stirring blades are more evenly distributed), and the force has changed, making it relatively easier to shake. It is recommended that you re-calibrate the balance of the mixing after making process changes to the mixing.
It is recommended to calculate the changes in the linear speed of the agitator. If the linear speed of the agitator increases, it may sometimes cause vibration. For reference!
The stirring torque has increased, it is recommended to change it to 1: 23 ratio speed, which is better for the motor
The speed of the reducer has been changed from 1/11 to 1/17, which should mean that the speed has become lower.
Although the rotational speed has been reduced, the critical rotational speed should be recalculated after the stirring paddle is changed to an anchor propeller. From the situation you described, it can be said that it resonates. If you still use anchor propellers and all configurations remain unchanged, you can add an inverter with the same power and use it at a reduced speed. The mixing effect should be sufficient.