Three common transmission modes of balancing machine
The methods of balancing machine driving rotor transmission for dynamic balance correction include belt drive, universal joint drive, and self drive.
1. Ring belt drive: It is the use of rubber or silk ring belts to drive the rotor by the motor belt. Therefore, the ring belt drive requires a smooth cylindrical surface on the surface of the rotor. The advantage of ring belt drive is not to affect the unbalance of the rotor, but to achieve high balance accuracy.
2. Coupling drive: It is the use of universal joints to connect the main shaft of the balancing machine with the rotor. The characteristic of coupling drive is suitable for rotors with irregular surfaces, which can transmit large torque and drive rotors with high wind resistance such as fans. The defect of coupling drive is that the unbalance of the coupling itself will affect the rotor (so it should be balanced before application), and it will also introduce interference and damage to the precision of balance. In addition, a large number of connecting discs need to be made to adapt to rotors of different specifications.
3. Self drive: It is a driving method that uses the power of the rotor itself to rotate. Self drive is a driving method that poses little harm to the balance precision. The balance precision can be maximized, but only unique rotors that are allowed to be constructed can be used for this type of driving method.
There are two types of dynamic balancing machines: soft support and hard support. The swing frame of a soft support balancing machine is relatively soft, and during the process of starting and stopping the transmission shaft, the swing frame of the soft support will have prominent vibrations, while the swing frame of the hard support does not have this phenomenon. From a methodological perspective, soft support balancing machines can achieve higher detection precision. However, this can only be distinguished in extremely precise testing. For the transmission shaft balancing machine, the precision that the hard support can achieve far exceeds the specific requirements. If it is found that the precision of a transmission shaft balancing machine cannot meet the requirements, it must be the result of other factors. Among the factors that endanger the balance precision, soft and hard supports are only one insignificant element.
The hazardous factors of high and low precision: Because all manufacturers have adopted microcomputer technology, the technology is already very mature, and the deviation caused by the electronic measurement part is already minimal. The precision of the transmission shaft balancing machine is no longer related to the electronic part.
There are two key hazardous elements:
1. The connection method between the rotating shaft and the balancing machine.
2. Balancing machine spindle machining precision.
The harmful factors of weight loss rate: If the weight loss rate of the balancing machine is relatively high, it can balance with fewer rotations and work faster.
The harmful factors of high or low weight loss rate include:
1. Is the calibration of the balancing machine accurate.
2. Is the weight and location of the balance block placed during use accurate.
3. The gap size between the cross axis of the rotating shaft and the telescopic sliding key.
Low speed and high speed:
When choosing a balancing machine with soft support, the speed must exceed about 3 times the resonance speed to be detectable (the higher the speed, the higher the weight reduction ratio), so usually a higher speed is chosen. The balance of hard support requires that the rotational speed must be within 3 times the resonant speed to work, so lower rotational speeds (especially for heavy-duty rotating shafts) are usually chosen. The speed is also related to the sensitivity of the selected sensor. If a sensor with high sensitivity is selected, a lower speed can be chosen. In the maintenance industry, if a lower speed is chosen, drivers may suspect the balancing effect, leading to a trend of increasing the speed. At the time of balancing heavy rotating shafts, the speed of hard supported balancing machines was usually low, making it easy for drivers to suspect the balancing function, which led to the popularity of soft supported balancing machines. When you were shopping for a balancing machine, you didn't just need to ask how high the speed of the equipment could meet the standard. You had to ask clearly about the speed that needed to be met when balancing large rotating shafts such as Steyr.
The methods of balancing machine driving rotor transmission for dynamic balance correction include belt drive, universal joint drive, and self drive.
1. Ring belt drive: It is the use of rubber or silk ring belts to drive the rotor by the motor belt. Therefore, the ring belt drive requires a smooth cylindrical surface on the surface of the rotor. The advantage of ring belt drive is not to affect the unbalance of the rotor, but to achieve high balance accuracy.
2. Coupling drive: It is the use of universal joints to connect the main shaft of the balancing machine with the rotor. The characteristic of coupling drive is suitable for rotors with irregular surfaces, which can transmit large torque and drive rotors with high wind resistance such as fans. The defect of coupling drive is that the unbalance of the coupling itself will affect the rotor (so it should be balanced before application), and it will also introduce interference and damage to the precision of balance. In addition, a large number of connecting discs need to be made to adapt to rotors of different specifications.
3. Self drive: It is a driving method that uses the power of the rotor itself to rotate. Self drive is a driving method that poses little harm to the balance precision. The balance precision can be maximized, but only unique rotors that are allowed to be constructed can be used for this type of driving method.
There are two types of dynamic balancing machines: soft support and hard support. The swing frame of a soft support balancing machine is relatively soft, and during the process of starting and stopping the transmission shaft, the swing frame of the soft support will have prominent vibrations, while the swing frame of the hard support does not have this phenomenon. From a methodological perspective, soft support balancing machines can achieve higher detection precision. However, this can only be distinguished in extremely precise testing. For the transmission shaft balancing machine, the precision that the hard support can achieve far exceeds the specific requirements. If it is found that the precision of a transmission shaft balancing machine cannot meet the requirements, it must be the result of other factors. Among the factors that endanger the balance precision, soft and hard supports are only one insignificant element.
The hazardous factors of high and low precision: Because all manufacturers have adopted microcomputer technology, the technology is already very mature, and the deviation caused by the electronic measurement part is already minimal. The precision of the transmission shaft balancing machine is no longer related to the electronic part.
There are two key hazardous elements:
1. The connection method between the rotating shaft and the balancing machine.
2. Balancing machine spindle machining precision.
The harmful factors of weight loss rate: If the weight loss rate of the balancing machine is relatively high, it can balance with fewer rotations and work faster.
The harmful factors of high or low weight loss rate include:
1. Is the calibration of the balancing machine accurate.
2. Is the weight and location of the balance block placed during use accurate.
3. The gap size between the cross axis of the rotating shaft and the telescopic sliding key.
Low speed and high speed:
When choosing a balancing machine with soft support, the speed must exceed about 3 times the resonance speed to be detectable (the higher the speed, the higher the weight reduction ratio), so usually a higher speed is chosen. The balance of hard support requires that the rotational speed must be within 3 times the resonant speed to work, so lower rotational speeds (especially for heavy-duty rotating shafts) are usually chosen. The speed is also related to the sensitivity of the selected sensor. If a sensor with high sensitivity is selected, a lower speed can be chosen. In the maintenance industry, if a lower speed is chosen, drivers may suspect the balancing effect, leading to a trend of increasing the speed. At the time of balancing heavy rotating shafts, the speed of hard supported balancing machines was usually low, making it easy for drivers to suspect the balancing function, which led to the popularity of soft supported balancing machines. When you were shopping for a balancing machine, you didn't just need to ask how high the speed of the equipment could meet the standard. You had to ask clearly about the speed that needed to be met when balancing large rotating shafts such as Steyr.
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