Balancer drives rotor drive to make dynamic balance correction by means of ring belt drive, universal coupling drive and self-drive.
1. Ring drive: rubber ring belt or silk ring belt is used to drive the rotor by the motor belt. Therefore, ring drive stipulates that the surface of the rotor must have a smooth cylindrical surface. The advantage of ring drive is not to affect the unbalance of the rotor, so the balance accuracy is high.
2. Coupling drive: the main shaft of the balancing machine is connected with the rotor by means of universal joint. The driving characteristic of the coupling is the suitable rotor with irregular surface, which can transmit large torque and properly drive the rotor with large wind resistance, such as the fan. The defect of the coupling drive is that the unbalance of the coupling itself will affect the rotor (so the coupling should balance it before application), and the precision of disturbance harmful balance will also be introduced. In addition, a large number of connecting discs have to be made to accommodate rotors of different sizes.
3. Self-drive: It is a driving method that uses the dynamic rotation of the rotor itself. Self-drive is a driving method that does little harm to the balance precision. The balance precision can reach the maximum, but only the unique rotor with permissible structure can apply such driving method.
Dynamic balancer can be divided into soft support and hard support. The swing frame of soft support balancer is relatively soft. During the process of starting and stopping drive shaft, the swing frame of soft support will have more outstanding vibration, but the swing frame of hard support will not have this phenomenon. Methodologically, a soft-supported balancer can achieve higher detection accuracy. However, this can only be distinguished in extremely sophisticated tests. For the drive shaft balancing machine, the precision of hard support which can meet the standard far exceeds the specific requirements. If you find that the precision of a propeller shaft balancer cannot meet the requirements, it must be the result of other factors. Soft and hard supports are only one insignificant element among the elements that compromise the balance precision.
Hazardous elements of high and low precision: because all manufacturers have selected the micro-computer technology, the technology has been very mature, the deviation caused by electronic measurement has been negligible, and the precision of drive shaft balancer has not been related to the electronic part much.
There are two critical hazard elements:
1. Connection method of rotating shaft and balancing machine.
2. Machining precision of balance machine spindle.
Hazardous elements of weight loss rate: If the weight loss rate of the balancer is relatively high, it can balance with less rotations and do things quickly.
Hazardous factors of high or low weight loss rate are:
1. Is the calibration of the balancer accurate?
2. Whether the weight and position of the balance weight are accurate when using.
3. Gap size of cross shaft of rotating shaft and expansion slide key.
Low and high speed:
With a soft-supported balancing machine, the speed must exceed about three times the resonance speed to be detectable (the higher the speed, the higher the weight loss ratio), so higher speed is usually chosen. For hard-supported balancing, rotational speeds must be within three times the resonant speed, so lower rotational speeds (very heavy rotating shafts) are usually used. The speed also depends on the sensitivity of the selected sensor. If a sensor with high sensitivity is selected, a lower speed can be selected. In the overhaul industry, if a lower Rev is selected, the driver will therefore be suspicious of the balance and therefore have a tendency to increase the rev. When balancing heavy rotating shafts, hard-supported balancers usually have low rotational speeds and drivers are suspicious of the balance, which has resulted in the popularity of soft-supported balancers. When you were choosing a balancing machine, you didn't have to ask only how high the equipment would reach the target speed; you had to ask clearly how high the speed would be when balancing large rotating shafts like Steyr.
1. Ring drive: rubber ring belt or silk ring belt is used to drive the rotor by the motor belt. Therefore, ring drive stipulates that the surface of the rotor must have a smooth cylindrical surface. The advantage of ring drive is not to affect the unbalance of the rotor, so the balance accuracy is high.
2. Coupling drive: the main shaft of the balancing machine is connected with the rotor by means of universal joint. The driving characteristic of the coupling is the suitable rotor with irregular surface, which can transmit large torque and properly drive the rotor with large wind resistance, such as the fan. The defect of the coupling drive is that the unbalance of the coupling itself will affect the rotor (so the coupling should balance it before application), and the precision of disturbance harmful balance will also be introduced. In addition, a large number of connecting discs have to be made to accommodate rotors of different sizes.
3. Self-drive: It is a driving method that uses the dynamic rotation of the rotor itself. Self-drive is a driving method that does little harm to the balance precision. The balance precision can reach the maximum, but only the unique rotor with permissible structure can apply such driving method.
Dynamic balancer can be divided into soft support and hard support. The swing frame of soft support balancer is relatively soft. During the process of starting and stopping drive shaft, the swing frame of soft support will have more outstanding vibration, but the swing frame of hard support will not have this phenomenon. Methodologically, a soft-supported balancer can achieve higher detection accuracy. However, this can only be distinguished in extremely sophisticated tests. For the drive shaft balancing machine, the precision of hard support which can meet the standard far exceeds the specific requirements. If you find that the precision of a propeller shaft balancer cannot meet the requirements, it must be the result of other factors. Soft and hard supports are only one insignificant element among the elements that compromise the balance precision.
Hazardous elements of high and low precision: because all manufacturers have selected the micro-computer technology, the technology has been very mature, the deviation caused by electronic measurement has been negligible, and the precision of drive shaft balancer has not been related to the electronic part much.
There are two critical hazard elements:
1. Connection method of rotating shaft and balancing machine.
2. Machining precision of balance machine spindle.
Hazardous elements of weight loss rate: If the weight loss rate of the balancer is relatively high, it can balance with less rotations and do things quickly.
Hazardous factors of high or low weight loss rate are:
1. Is the calibration of the balancer accurate?
2. Whether the weight and position of the balance weight are accurate when using.
3. Gap size of cross shaft of rotating shaft and expansion slide key.
Low and high speed:
With a soft-supported balancing machine, the speed must exceed about three times the resonance speed to be detectable (the higher the speed, the higher the weight loss ratio), so higher speed is usually chosen. For hard-supported balancing, rotational speeds must be within three times the resonant speed, so lower rotational speeds (very heavy rotating shafts) are usually used. The speed also depends on the sensitivity of the selected sensor. If a sensor with high sensitivity is selected, a lower speed can be selected. In the overhaul industry, if a lower Rev is selected, the driver will therefore be suspicious of the balance and therefore have a tendency to increase the rev. When balancing heavy rotating shafts, hard-supported balancers usually have low rotational speeds and drivers are suspicious of the balance, which has resulted in the popularity of soft-supported balancers. When you were choosing a balancing machine, you didn't have to ask only how high the equipment would reach the target speed; you had to ask clearly how high the speed would be when balancing large rotating shafts like Steyr.
210 browse