Unbalanced rotor mass often generates excessive vibration and reduces the lifespan of mechanical components. Firstly, we define unbalance. When the center line of the rotor mass does not coincide with the center line of the shaft, imbalance occurs. If the equipment experiences an imbalance fault, we need to conduct on-site dynamic balancing experiments to eliminate the imbalance component and reduce vibration. In this case, we need an on-site dynamic balancing instrument.
There are many brands of on-site dynamic balancing instruments in the market. How can we choose a suitable dynamic balancing 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, the evaluation of a dynamic balancer is based on the following criteria:
1. Measurement performance: working speed and accuracy, range and linearity, minimum resolution, phase angle tracking accuracy, filtering characteristics, sharpness, system stability and repeatability
2. Balancing solution function: It can calculate the radius and angle of the selected calibration plane based on test data, and determine the appropriate mass to significantly reduce rotor vibration. Example: Dynamic balance of one measuring point and one calibration plane. Two measuring points, two calibration planes, and others. Dynamic balance of multiple measurement points and 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 the vibration is complex, it is necessary to understand the time-domain waveform and frequency spectrum analysis of the vibration. Only when the equipment experiences an imbalance fault, our dynamic balancing instrument can calculate the radius, weight, and angle of the counterweight to eliminate the imbalance component. The dynamic balancing instrument with time and frequency domain analysis functions undoubtedly provides convenience for the qualitative analysis of equipment faults, lays a solid foundation for on-site dynamic balancing, and avoids directional errors.
4. Fast vibration reduction of structurally symmetrical double supported rotors: simultaneous testing and balancing of both sides in the same direction to eliminate force imbalance; Simultaneously test in opposite directions on both sides and balance the weight to eliminate the imbalance of the force couple. Simultaneously test and match different weights at different phases on both sides to eliminate force and couple imbalance. Both can reduce the number of startup and shutdown times. Test weight while doing, use the stored influence coefficient to measure the original vibration, then weigh the weight, and after recording the measurement, input the data for calculation in one go; Weighting synthesis and decomposition.
The Huake Zhichuang on-site dynamic balancing instrument has superior performance and excellent cost-effectiveness. It is more convenient to carry than ordinary horizontal and vertical balancing machines, greatly reduces volume, and does not rely on external power transmission. Its dynamic balancing data can be disconnected during equipment operation. It is possible to quickly assess the operation status of the equipment on site. After using the system influence coefficient to determine the standard, the system will automatically calculate the size and angle of the added (subtracted) weight, and eliminate the imbalance on the equipment or shaft through dynamic balancing. Just need the speed signal and the vibration signals at both ends connected, the connection is simple and not limited by any space. According to the 602 computer measurement system, the instrument can measure single-sided balance and double-sided balance. Rotating objects such as fans, motors, impellers, and main shafts are all measured by on-site balancing instruments. We believe that the use of this dynamic balance measuring instrument in the market will bring very good benefits to customers.
There are many brands of on-site dynamic balancing instruments in the market. How can we choose a suitable dynamic balancing 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, the evaluation of a dynamic balancer is based on the following criteria:
1. Measurement performance: working speed and accuracy, range and linearity, minimum resolution, phase angle tracking accuracy, filtering characteristics, sharpness, system stability and repeatability
2. Balancing solution function: It can calculate the radius and angle of the selected calibration plane based on test data, and determine the appropriate mass to significantly reduce rotor vibration. Example: Dynamic balance of one measuring point and one calibration plane. Two measuring points, two calibration planes, and others. Dynamic balance of multiple measurement points and 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 the vibration is complex, it is necessary to understand the time-domain waveform and frequency spectrum analysis of the vibration. Only when the equipment experiences an imbalance fault, our dynamic balancing instrument can calculate the radius, weight, and angle of the counterweight to eliminate the imbalance component. The dynamic balancing instrument with time and frequency domain analysis functions undoubtedly provides convenience for the qualitative analysis of equipment faults, lays a solid foundation for on-site dynamic balancing, and avoids directional errors.
4. Fast vibration reduction of structurally symmetrical double supported rotors: simultaneous testing and balancing of both sides in the same direction to eliminate force imbalance; Simultaneously test in opposite directions on both sides and balance the weight to eliminate the imbalance of the force couple. Simultaneously test and match different weights at different phases on both sides to eliminate force and couple imbalance. Both can reduce the number of startup and shutdown times. Test weight while doing, use the stored influence coefficient to measure the original vibration, then weigh the weight, and after recording the measurement, input the data for calculation in one go; Weighting synthesis and decomposition.
The Huake Zhichuang on-site dynamic balancing instrument has superior performance and excellent cost-effectiveness. It is more convenient to carry than ordinary horizontal and vertical balancing machines, greatly reduces volume, and does not rely on external power transmission. Its dynamic balancing data can be disconnected during equipment operation. It is possible to quickly assess the operation status of the equipment on site. After using the system influence coefficient to determine the standard, the system will automatically calculate the size and angle of the added (subtracted) weight, and eliminate the imbalance on the equipment or shaft through dynamic balancing. Just need the speed signal and the vibration signals at both ends connected, the connection is simple and not limited by any space. According to the 602 computer measurement system, the instrument can measure single-sided balance and double-sided balance. Rotating objects such as fans, motors, impellers, and main shafts are all measured by on-site balancing instruments. We believe that the use of this dynamic balance measuring instrument in the market will bring very good benefits to customers.
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