單平面風扇動平衡系統之誤差源及不確定度評估

The Error Sources and Uncertainty Assessment for Single -Plane Fan Dynamic Balance System

王聖涵 ； 黃宇中

《中華民國振動與噪音工程學會論文集》 2010 (2010/06) Pp. 313-317

https://doi.org/10.30028/CSSVANNUAL.201006.0313

摘要

The purpose is to provide the standardization ofmeasurement instrument for products in aproduction line. Signals measured by that systeminclude computer-controlled signal output, rotorspeed detected by a laser and vibration signalsmeasured by an accelerometer, which candetermine the imbalance location of a rotor andbalance level after the calculation as well asverify the rotor system of dynamic balance bythe methods in ISO 1940-2. This studyempirically assesses the uncertainty of dynamicbalance system, which follows “Guide to theExpression of Uncertainty in Measurement(referred to as ISO GUM below)” proposed bythe ISO to assess the performance of dynamicbalance system as a standard of balance level formeasurement instrument. After assessed, the beststatus of the balance level for system energyconforms to the balance level G 0.2 of ISO 1940.Using plastic screw as known standard mass 30mg adds the system to simulate the mass ofimbalance standard. After the system uncertaintywith and without mass is assessed, the massdifference is very small and the angle differenceis about 10%. The system is assessed at differentrpm without mass. The results show theuncertainty of fan dynamic balancing machine ishigher at 10000 rpm, which can achieve themass error ＜ 1 mg, compensation degree error ＜2o and minimum measured balance is 0.2 g mm.The uncertainties at different mass and rpm canbe assessed in the future to provide each kind ofon-line fan manufacture.

關鍵字

轉子平衡系統 ； 平衡誤差 ； 轉子不確定度評估

並列摘要

The purpose is to provide the standardization ofmeasurement instrument for products in aproduction line. Signals measured by that systeminclude computer-controlled signal output, rotorspeed detected by a laser and vibration signalsmeasured by an accelerometer, which candetermine the imbalance location of a rotor andbalance level after the calculation as well asverify the rotor system of dynamic balance bythe methods in ISO 1940-2. This studyempirically assesses the uncertainty of dynamicbalance system, which follows “Guide to theExpression of Uncertainty in Measurement(referred to as ISO GUM below)” proposed bythe ISO to assess the performance of dynamicbalance system as a standard of balance level formeasurement instrument. After assessed, the beststatus of the balance level for system energyconforms to the balance level G 0.2 of ISO 1940.Using plastic screw as known standard mass 30mg adds the system to simulate the mass ofimbalance standard. After the system uncertaintywith and without mass is assessed, the massdifference is very small and the angle differenceis about 10%. The system is assessed at differentrpm without mass. The results show theuncertainty of fan dynamic balancing machine ishigher at 10000 rpm, which can achieve themass error ＜ 1 mg, compensation degree error ＜2o and minimum measured balance is 0.2 g mm.The uncertainties at different mass and rpm canbe assessed in the future to provide each kind ofon-line fan manufacture.