Several misconceptions in the selection of dynamic balancing machines
Dynamic balancing machine is a precision instrument equipment with high technical content. It is not only necessary to pay attention to the workpiece parameters and balancing machine model, but also to avoid entering into selection errors. The following are several common errors that need to be avoided.
1. Balance speed and balance precision
Due to a lack of understanding of dynamic balancing machines, customers usually think that the higher the balancing speed for dynamic balancing, the better the balancing precision. However, this is not the case. A good hard support dynamic balancing machine can correctly detect the magnitude of unbalance at lower speeds, rather than the higher the speed, the better the balance precision. For rotors of different qualities and shapes, we will use different balancing speeds to achieve higher detection efficiency and precision of the dynamic balancing machine. Under normal circumstances, the speed of a hard supported dynamic balancing machine is controlled within the range of 200-1500r/min, which can meet most of the standards for rotor dynamic balancing; For soft supported dynamic balancing machines, there is a certain correlation between balancing speed and balancing precision. Within a certain speed range, balancing speed and balancing precision have a linear relationship.
2. The mass of the rotor and the large load-bearing capacity of the dynamic balancing machine
In the selection process of a dynamic balancing machine, the rotor mass and the larger load-bearing capacity of the dynamic balancing machine are important reference indicators. Different types and specifications of dynamic balancing machines will be used for rotors of different qualities. The rotor quality is usually maintained at 25% to 80% of the larger load-bearing capacity of the dynamic balancing machine. The balance precision and efficiency of the dynamic balancing machine are good, and the service life is long.
3. Rotor balance state and working state
Some customers feel that the support method for rotor dynamic balancing should be the same as that during operation, in order for the precision of rotor dynamic balancing to meet the working standards. This is mainly due to insufficient understanding of the dynamic balancing machine. A dynamic balancing machine is the measurement and correction of the unbalance within a unit mass of the rotor, ensuring that the rotor reaches the smaller value of the unbalance within the rotor mass range under the current technical standards of dynamic balancing machines. Rotor dynamic balancing is the adjustment of the unit mass range of the rotor itself, and its precision and balance state are not related. Customers only need to correctly install the rotor to use the equipment with confidence.
4. Working speed and balance speed
Some customers feel that the balance speed needs to reach the working speed of the rotor in order for the dynamic balance precision of the rotor to meet the requirements. This is because customers do not have enough understanding of the concept of balance speed. Balance speed: The speed at which a dynamic balancing machine performs dynamic balancing calibration, selecting a lower speed as much as possible for a rigid rotor while ensuring precision. That is, at the calibrated balance speed, the dynamic balancing machine can efficiently measure the unbalance of the rotor. The key to balancing the speed is related to the quality, shape, etc. of the rotor. Generally, the larger the rotor mass, the lower the balancing speed, which is not related to the working speed.
Dynamic balancing machine is a precision instrument equipment with high technical content. It is not only necessary to pay attention to the workpiece parameters and balancing machine model, but also to avoid entering into selection errors. The following are several common errors that need to be avoided.
1. Balance speed and balance precision
Due to a lack of understanding of dynamic balancing machines, customers usually think that the higher the balancing speed for dynamic balancing, the better the balancing precision. However, this is not the case. A good hard support dynamic balancing machine can correctly detect the magnitude of unbalance at lower speeds, rather than the higher the speed, the better the balance precision. For rotors of different qualities and shapes, we will use different balancing speeds to achieve higher detection efficiency and precision of the dynamic balancing machine. Under normal circumstances, the speed of a hard supported dynamic balancing machine is controlled within the range of 200-1500r/min, which can meet most of the standards for rotor dynamic balancing; For soft supported dynamic balancing machines, there is a certain correlation between balancing speed and balancing precision. Within a certain speed range, balancing speed and balancing precision have a linear relationship.
2. The mass of the rotor and the large load-bearing capacity of the dynamic balancing machine
In the selection process of a dynamic balancing machine, the rotor mass and the larger load-bearing capacity of the dynamic balancing machine are important reference indicators. Different types and specifications of dynamic balancing machines will be used for rotors of different qualities. The rotor quality is usually maintained at 25% to 80% of the larger load-bearing capacity of the dynamic balancing machine. The balance precision and efficiency of the dynamic balancing machine are good, and the service life is long.
3. Rotor balance state and working state
Some customers feel that the support method for rotor dynamic balancing should be the same as that during operation, in order for the precision of rotor dynamic balancing to meet the working standards. This is mainly due to insufficient understanding of the dynamic balancing machine. A dynamic balancing machine is the measurement and correction of the unbalance within a unit mass of the rotor, ensuring that the rotor reaches the smaller value of the unbalance within the rotor mass range under the current technical standards of dynamic balancing machines. Rotor dynamic balancing is the adjustment of the unit mass range of the rotor itself, and its precision and balance state are not related. Customers only need to correctly install the rotor to use the equipment with confidence.
4. Working speed and balance speed
Some customers feel that the balance speed needs to reach the working speed of the rotor in order for the dynamic balance precision of the rotor to meet the requirements. This is because customers do not have enough understanding of the concept of balance speed. Balance speed: The speed at which a dynamic balancing machine performs dynamic balancing calibration, selecting a lower speed as much as possible for a rigid rotor while ensuring precision. That is, at the calibrated balance speed, the dynamic balancing machine can efficiently measure the unbalance of the rotor. The key to balancing the speed is related to the quality, shape, etc. of the rotor. Generally, the larger the rotor mass, the lower the balancing speed, which is not related to the working speed.
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