In order to determine the size and position of the corrected mass of the rotor to be balanced, in the case of on-site dynamic balance correction, the method of placing the trial mass is used to temporarily change the mass distribution of the rotor, measure the changes in vibration amplitude and phase caused by this, and determine the truly needed corrected mass size and placement position based on the impact of the trial mass.
Any point on the bearing periodically experiences centrifugal force generated by rotor imbalance at the same frequency as the rotational speed. So in the vibration signal spectrum, imbalance is manifested in an increase in the vibration signal at the rotational frequency.
Generally, a vibration sensor is installed on the rotor bearing shell to measure the vibration caused by imbalance. The vibration signal at the rotational frequency is proportional to the force generated by the unbalanced mass, and in order to measure phase and rotational frequency, a speed sensor is also used. This instrument uses a laser photoelectric speed sensor and uses the position of the reflective strip as the phase reference point of the vibration signal to determine the imbalance angle of the rotor. In summary, the amplitude and phase of unbalanced vibration can be used to determine the balance correction torque and correction angle relative to the center of mass position of the test weight. After selecting the correction radius, the size and placement position of the correction mass can be calculated based on the correction torque and angle.
Any point on the bearing periodically experiences centrifugal force generated by rotor imbalance at the same frequency as the rotational speed. So in the vibration signal spectrum, imbalance is manifested in an increase in the vibration signal at the rotational frequency.
Generally, a vibration sensor is installed on the rotor bearing shell to measure the vibration caused by imbalance. The vibration signal at the rotational frequency is proportional to the force generated by the unbalanced mass, and in order to measure phase and rotational frequency, a speed sensor is also used. This instrument uses a laser photoelectric speed sensor and uses the position of the reflective strip as the phase reference point of the vibration signal to determine the imbalance angle of the rotor. In summary, the amplitude and phase of unbalanced vibration can be used to determine the balance correction torque and correction angle relative to the center of mass position of the test weight. After selecting the correction radius, the size and placement position of the correction mass can be calculated based on the correction torque and angle.
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