The centrifugal balancer measures the imbalance according to the support vibration caused by the rotor imbalance or the vibration force acting on the support in a state where the rotor rotates. It can be divided into a single-sided balancing machine and a double-sided balancing machine according to the number of correction planes. The single-sided vertical balancing machine can only measure the imbalance on one plane (static unbalance). Although it is measured while the rotor is rotating, it still belongs to the static balance machine. The double-sided balancing machine can measure the dynamic imbalance, and can also measure the static imbalance and the even imbalance, which are generally called dynamic balance machines.
The centrifugal force balancing machine can be divided into a soft bearing balancing machine and a hard bearing balancing machine according to different bearing characteristics. A balancer speed is higher than the natural frequency of the rotor-support system, called a soft-bearing balancer. The balancer has a small support stiffness, and the signal detected by the sensor is proportional to the vibration displacement of the support. The balance speed is lower than the natural frequency of the rotor-support system. This is called a hard-bearing balancer. The balance of the balancer is large, and the signal detected by the sensor is proportional to the vibration force of the support.
The main performance of the balancing machine is represented by two comprehensive indicators: the minimum reachable residual imbalance and the unbalanced reduction rate. The former is the minimum value of the residual unbalance that the balance machine can reach. It is an indicator to measure the maximum balance capacity of the balancer; the latter is the ratio of the imbalance that is reduced after one correction to the initial imbalance, which is a measure. The indicator of balance efficiency is generally expressed as a percentage.
In modern machinery, flexible rotor balancing machines have been developed due to the widespread use of flexible rotors. This kind of balancing machine must carry out stepless speed regulation within the working speed range of the rotor; in addition to measuring the vibration or vibration force of the support, it can also measure the deflection of the rotor. The flexible rotor balancing machine is sometimes installed in a vacuum protection room to suit the balance of the rotor such as a steam turbine. It is equipped with a large number of auxiliary equipment such as vacuuming system, lubrication system, lubricating oil degassing system and data processing computer system.
According to the needs of mass production, automatic balancing machines that can automatically perform balance measurement and balance correction for specific rotors, as well as balance automatic lines, Hyundai has been extensively equipped in the industrial sectors such as automobile manufacturing and motor manufacturing.
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