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The manufacturer introduces the sensitivity and accuracy of the balancing machine

The manufacturer introduces the sensitivity and accuracy of the balancing machine
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  • Categories:news
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  • Time of issue:2021-04-27 21:05
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(Summary description)There are always various ways of expressing the sensitivity and accuracy of balancing machines. Generally speaking, the accuracy of the so-called instrumentation is usually expressed as the percentage of the indicated value or full scale for the amplitude error, while the phase error is usually expressed in degrees. But for the balance machine, if it is corrected according to the imbalance indication expressed with the above accuracy.

The manufacturer introduces the sensitivity and accuracy of the balancing machine
TopRecommend

There are always various ways of expressing the sensitivity and accuracy of balancing machines. Generally speaking, the accuracy of the so-called instrumentation is usually expressed as the percentage of the indicated value or full scale for the amplitude error, while the phase error is usually expressed in degrees. But for the balance machine, if it is corrected according to the imbalance indication expressed with the above accuracy.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2021-04-27 21:05
  • Views:

There are always various ways of expressing the sensitivity and accuracy of balancing machines. Generally speaking, the accuracy of the so-called instrumentation is usually expressed as the percentage of the indicated value or full scale for the amplitude error, while the phase error is usually expressed in degrees. But for the balance machine, if it is corrected according to the imbalance indication expressed with the above accuracy.

 

And use the allowable residual unbalance of the rotor to reach a certain limit, then for a rotor with a large initial unbalance, this error is too strict, and for a rotor with a small initial unbalance, this error is again It looks very loose. In addition, even if there is a certain amplitude and phase error, if the number of corrections is increased, the remaining imbalance will gradually decrease within a certain limit, but it cannot be smaller after reaching a certain limit.

On the other hand, the so-called sensitivity refers to the amount of unbalance (which can be expressed as μm/div or g·㎜/div) that must be applied to increase the indication of the indicating instrument by one scale. The above values ​​vary with the mass of the rotor. In view of the above situation, the International Organization for Standardization has recently established a method and standard for evaluating the performance of balancing machines. It adopts the specified calibration rotor and carries out the test according to the specified procedure. The inspection result is expressed as the smallest achievable residual unbalance and the reduction rate of unbalance.

The relationship between the sensitivity or accuracy of the hard-bearing balancing machine and the soft-bearing balancing machine is different from the mass and speed of the rotor. The sensitivity curve of the hard-bearing balancing machine is shown in Figure 3.82. The balancing machine illustrated in this figure has a maximum rotor mass of 1t, a balancing speed of 280-2080r/min, and a total of five gears. In the figure, the vertical axis is the minimum achievable remaining unbalanced machine quantity, and the horizontal axis is the rotor mass. The graph uses the speed as a parameter to draw a curve.

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