Unbalanced rotor mass often generates excessive vibration and reduces the lifespan of mechanical components. Firstly, we define imbalance. Unbalance occurs when the centerline of the rotor mass does not coincide with the centerline of the shaft. If an imbalance fault occurs in the equipment, we need to conduct on-site dynamic balance experiments to eliminate the imbalance component and reduce vibration. At this point, we need a on-site dynamic balance instrument.
There are many brands of on-site dynamic balance instruments in the market. How can we choose a suitable dynamic balance instrument and what are the reference indicators? Below, the technical master of Huake Zhichuang Dynamic Balancing Machine will share the summarized experience with everyone.
In general, dynamic balancing instruments are evaluated from the following aspects:
1. Measurement performance: working speed and accuracy, range and linearity, minimum resolution, phase angle tracking accuracy, filtering characteristics, whether sharp enough, system stability and repeatability
2. Counterweight solving function: The ability to calculate the radius and angle of the selected correction plane and the amount of mass to significantly reduce rotor vibration based on test data. Example: One measurement point, one correction plane dynamic balance. Two measuring points, two correction planes, and others. Dynamic balance of multiple measurement points and multiple calibration planes. The number of measurement points is equal to the calibration plane. There are more measurement points than the calibration plane. The number of measurement points is smaller than the calibration plane.
3. Time and frequency domain analysis function: Not all vibrations can be eliminated using dynamic balancing technology. When vibration is complex, it is necessary to understand the time-domain waveform and spectrum analysis of vibration. Our dynamic balance instrument can only calculate the radius, weight, and angle of the counterweight to eliminate the imbalance component when the equipment experiences an imbalance fault. The dynamic balance instrument with time and frequency domain analysis functions undoubtedly provides convenience for the qualitative analysis of equipment faults, laying a solid foundation for on-site dynamic balance and avoiding directional errors.
4. Rapid vibration reduction of structurally symmetrical double supported rotors: simultaneous testing of both sides in the same direction, and balancing to eliminate force imbalance; Simultaneously test both sides in opposite directions and balance weights to eliminate the imbalance of the couple. Two sides are tested and matched with different weights at different phases simultaneously to eliminate the imbalance between force and couple. Both can reduce the number of starts and stops. While testing and doing, use the stored influence coefficient to measure the original vibration, and then balance the weight. After recording the measurement, input the data for calculation in one go; Counterweight synthesis and decomposition.
The Huake Zhichuang on-site dynamic balance instrument has superior performance and excellent cost-effectiveness, making it easier to carry than ordinary horizontal and vertical balance machines. Its volume is greatly reduced, and it does not rely on external power transmission. As long as the equipment is running, its dynamic balance data can be accurately determined. The operation status of the equipment can be quickly judged on site. After the system's influence coefficient is calibrated, the system will automatically calculate the weight and angle of the added (subtracted) counterweight, and eliminate the imbalance on the equipment or shaft through dynamic balancing. All you need is a speed signal, and the vibration signals at both ends can be connected easily without any space limitations. The instrument follows the 602 computer measurement system and can measure single sided balance and double sided balance. Rotating objects such as fans, motors, impellers, and spindles are all measured by on-site balancing instruments. We believe that using this dynamic balance measuring instrument on the market will bring very good benefits to customers.
There are many brands of on-site dynamic balance instruments in the market. How can we choose a suitable dynamic balance instrument and what are the reference indicators? Below, the technical master of Huake Zhichuang Dynamic Balancing Machine will share the summarized experience with everyone.
In general, dynamic balancing instruments are evaluated from the following aspects:
1. Measurement performance: working speed and accuracy, range and linearity, minimum resolution, phase angle tracking accuracy, filtering characteristics, whether sharp enough, system stability and repeatability
2. Counterweight solving function: The ability to calculate the radius and angle of the selected correction plane and the amount of mass to significantly reduce rotor vibration based on test data. Example: One measurement point, one correction plane dynamic balance. Two measuring points, two correction planes, and others. Dynamic balance of multiple measurement points and multiple calibration planes. The number of measurement points is equal to the calibration plane. There are more measurement points than the calibration plane. The number of measurement points is smaller than the calibration plane.
3. Time and frequency domain analysis function: Not all vibrations can be eliminated using dynamic balancing technology. When vibration is complex, it is necessary to understand the time-domain waveform and spectrum analysis of vibration. Our dynamic balance instrument can only calculate the radius, weight, and angle of the counterweight to eliminate the imbalance component when the equipment experiences an imbalance fault. The dynamic balance instrument with time and frequency domain analysis functions undoubtedly provides convenience for the qualitative analysis of equipment faults, laying a solid foundation for on-site dynamic balance and avoiding directional errors.
4. Rapid vibration reduction of structurally symmetrical double supported rotors: simultaneous testing of both sides in the same direction, and balancing to eliminate force imbalance; Simultaneously test both sides in opposite directions and balance weights to eliminate the imbalance of the couple. Two sides are tested and matched with different weights at different phases simultaneously to eliminate the imbalance between force and couple. Both can reduce the number of starts and stops. While testing and doing, use the stored influence coefficient to measure the original vibration, and then balance the weight. After recording the measurement, input the data for calculation in one go; Counterweight synthesis and decomposition.
The Huake Zhichuang on-site dynamic balance instrument has superior performance and excellent cost-effectiveness, making it easier to carry than ordinary horizontal and vertical balance machines. Its volume is greatly reduced, and it does not rely on external power transmission. As long as the equipment is running, its dynamic balance data can be accurately determined. The operation status of the equipment can be quickly judged on site. After the system's influence coefficient is calibrated, the system will automatically calculate the weight and angle of the added (subtracted) counterweight, and eliminate the imbalance on the equipment or shaft through dynamic balancing. All you need is a speed signal, and the vibration signals at both ends can be connected easily without any space limitations. The instrument follows the 602 computer measurement system and can measure single sided balance and double sided balance. Rotating objects such as fans, motors, impellers, and spindles are all measured by on-site balancing instruments. We believe that using this dynamic balance measuring instrument on the market will bring very good benefits to customers.
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