In order to determine the size and position of the calibration mass of the rotor to be balanced, under the condition of on-site dynamic balance calibration, the mass distribution of the rotor is temporarily changed by means of positioning test mass, the amplitude and phase changes of the vibration caused by it are measured, and the size and position of the calibration mass truly required are determined by the effect of the test mass.
Any point on the bearing periodically experiences centrifugal forces generated by rotor imbalance at the same frequency as the rotational speed. Therefore, in the spectrum of vibration signal, the imbalance is shown by the increase of vibration signal at the rotational frequency.
A vibration sensor is usually installed on the rotor bearing housing to measure the vibration caused by imbalance. The vibration signal at the Rev frequency is proportional to the force produced by unbalanced mass. To measure phase and rev frequency, a speed sensor is also used. The instrument uses a laser photoelectric speed sensor and uses the position of the reflector bar as the phase reference point of the vibration signal to determine the unbalanced angle of the rotor. In conclusion, the amplitude and phase of unbalanced vibration can be used to determine the balance correction torque and the correction angle relative to the position of the center of mass of the test weight. Once the calibration radius is selected, the calibration mass and its position can be calculated according to the calibration torque and angle.
Established in 2002, Shanghai Shenman Electrical and Mechanical Equipment Co., Ltd. is a famous dynamic balancing machine manufacturing enterprise and balance testing equipment supplier in China. Its main business is self-driven balancing machine, automatic positioning balancing machine, vertical balancing machine, on-site balancer, balancing machine, ring balancing machine, dynamic balancing machine, automatic balancing machine, drive shaft balancing machine, cardan joint balancing machine, etc. It is one of the earlier private enterprises in China that has the capacity to produce 40 ton dynamic balancing machine, and at the same time, it is one of the enterprises that keep the private dynamic balancing machine breaking the production record of 70 ton dynamic balancing machine. For more information and prices on the balancing machine, please contact us!
Any point on the bearing periodically experiences centrifugal forces generated by rotor imbalance at the same frequency as the rotational speed. Therefore, in the spectrum of vibration signal, the imbalance is shown by the increase of vibration signal at the rotational frequency.
A vibration sensor is usually installed on the rotor bearing housing to measure the vibration caused by imbalance. The vibration signal at the Rev frequency is proportional to the force produced by unbalanced mass. To measure phase and rev frequency, a speed sensor is also used. The instrument uses a laser photoelectric speed sensor and uses the position of the reflector bar as the phase reference point of the vibration signal to determine the unbalanced angle of the rotor. In conclusion, the amplitude and phase of unbalanced vibration can be used to determine the balance correction torque and the correction angle relative to the position of the center of mass of the test weight. Once the calibration radius is selected, the calibration mass and its position can be calculated according to the calibration torque and angle.
Established in 2002, Shanghai Shenman Electrical and Mechanical Equipment Co., Ltd. is a famous dynamic balancing machine manufacturing enterprise and balance testing equipment supplier in China. Its main business is self-driven balancing machine, automatic positioning balancing machine, vertical balancing machine, on-site balancer, balancing machine, ring balancing machine, dynamic balancing machine, automatic balancing machine, drive shaft balancing machine, cardan joint balancing machine, etc. It is one of the earlier private enterprises in China that has the capacity to produce 40 ton dynamic balancing machine, and at the same time, it is one of the enterprises that keep the private dynamic balancing machine breaking the production record of 70 ton dynamic balancing machine. For more information and prices on the balancing machine, please contact us!
183 Views
