In fact, what we usually refer to as a balancing machine is usually a dynamic balancing machine. Balancing machines can be divided into single-sided balancing machines and double-sided balancing machines according to the number of calibration planes. A single-sided balancing machine can only measure unbalance on one plane (static unbalance), and although it is measured when the rotor rotates, it still belongs to a static balancing machine. The double-sided balancing machine can measure dynamic unbalance, as well as static unbalance and even unbalance separately, and is generally referred to as a dynamic balancing machine.
A dynamic balancing machine measures unbalance based on the support vibration caused by rotor unbalance or the vibration force acting on the support while the rotor is rotating. Dynamic balancing machines can be divided into soft support balancing machines and hard support balancing machines according to their different support characteristics.
A soft support balancing machine is one that has a balanced speed higher than the natural frequency of the rotor support system. This type of balancing machine has a low support stiffness, and the signal detected by the sensor is proportional to the vibration displacement of the support.
A hard supported balancing machine is one in which the balancing speed is lower than the natural frequency of the rotor support system. This type of balancing machine has a high support stiffness, and the signal detected by the sensor is proportional to the vibration force of the support.
The main performance of a dynamic balancing machine is represented by two comprehensive indicators: the minimum achievable residual unbalance and the unbalance reduction rate. The former is the minimum value of residual unbalance that the dynamic balancing machine can achieve in the rotor, and it is an indicator of the highest balancing capacity of the dynamic balancing machine; The latter is the ratio of the reduced imbalance after a correction to the initial imbalance, which is an indicator of balance efficiency and is generally expressed as a percentage.
A dynamic balancing machine measures unbalance based on the support vibration caused by rotor unbalance or the vibration force acting on the support while the rotor is rotating. Dynamic balancing machines can be divided into soft support balancing machines and hard support balancing machines according to their different support characteristics.
A soft support balancing machine is one that has a balanced speed higher than the natural frequency of the rotor support system. This type of balancing machine has a low support stiffness, and the signal detected by the sensor is proportional to the vibration displacement of the support.
A hard supported balancing machine is one in which the balancing speed is lower than the natural frequency of the rotor support system. This type of balancing machine has a high support stiffness, and the signal detected by the sensor is proportional to the vibration force of the support.
The main performance of a dynamic balancing machine is represented by two comprehensive indicators: the minimum achievable residual unbalance and the unbalance reduction rate. The former is the minimum value of residual unbalance that the dynamic balancing machine can achieve in the rotor, and it is an indicator of the highest balancing capacity of the dynamic balancing machine; The latter is the ratio of the reduced imbalance after a correction to the initial imbalance, which is an indicator of balance efficiency and is generally expressed as a percentage.
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