Questions About The Balancer

In the related problems of dynamic balancing machine detection: the commonly used machinery contains a large number of components that perform rotary motion, such as various transmission shafts, main shafts, motors and rotors of steam turbines, which are collectively referred to as revolving bodies. In an ideal situation, the pressure on the bearing is the same when the rotating body is rotating and when it is not rotating, and such a rotating body is a balanced rotating body.

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However, due to various factors such as uneven material or blank defects, errors in processing and assembly, and even asymmetric geometric shapes in design, various revolving bodies in engineering make the revolving body rotate. The centrifugal inertial force generated by the tiny particles cannot cancel each other out. The centrifugal inertial force acts on the machine and its foundation through the bearing, causing vibration, noise, accelerated bearing wear, shortened mechanical life, and can cause destructive accidents in severe cases. To this end, the rotor must be balanced so that it reaches the allowable level of balancing accuracy, or the resulting mechanical vibration amplitude is reduced within the allowable range. The difference between rotor dynamic balance and static balance.

static balance

The balance is corrected on one correction surface of the rotor, and the remaining unbalance after correction ensures that the rotor is within the specified range of the allowable unbalance when the rotor is static. It is also called static balance and single-sided balance.

Dynamic balance

Correction and balance are carried out on the two correction surfaces of the rotor at the same time, and the residual unbalance after correction is to ensure that the rotor is within the specified range of the allowable unbalance when the rotor is dynamic, which is also called double-sided balance.

Selection and Determination of Rotor Balance

How to choose the balance method of the rotor is a key issue. The selection has such a principle: as long as it meets the needs of the rotor after balance, do not do dynamic balancing if it can be statically balanced, and do not do static and dynamic balancing if it can do dynamic balance. The reason is very simple. Static balancing is easier to do than dynamic balancing, saving labor, effort and cost.