High-speed dynamic deflection control method for slender flexible rotors
A flexible rotor and control method technology, applied in the high-speed dynamic deflection control technology and the field of high-speed dynamic deflection control of slender flexible rotors, can solve problems such as flying out of balance weights, low balancing efficiency, and distortion of measured values, so as to improve the real performance and stability, improve overall quality, and ensure regularity
Active Publication Date: 2020-12-22
HARBIN DONGAN ENGINE GRP
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Problems solved by technology
This process leads to repeated start and stop of the balancing machine through repeated test weight measurement and multiple material removal. Not only is the balancing efficiency low and the shape of the material is irregular, but also for slender flexible shafts with a length greater than 800mm and a diameter less than 30mm , when the rotation speed exceeds 10000 rpm, the strength of the adhesive tape to bond the balance weight is insufficient, which will cause a dangerous accident of the balance weight flying out, which will not only cause safety hazards but also cause distortion of the measured value, which cannot meet the requirements of high precision, high quality, and high speed. Requirements for the use of long flexible rotors
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[0030] A slender flexible rotor for aviation has an overall length of 820 mm, an outer diameter of 28 mm, and a critical operating speed of 15,000 rpm. The dynamic deflection control is required to be no greater than 0.2 at a speed of 21,000 rpm. mm, no abnormal vibration and sound under all working conditions. The specific steps are as follows:
[0031] (1) Prepare a test piece identical to the slender flexible rotor to be balanced, install it on the balancing machine, start the balancing machine until the rotor reaches the speed of the rotor, measure the dynamic deflection, and record the value of the dynamic deflection, The balance value and the corresponding wave peak angle phase. Use a milling cutter to remove materials of different depths at the angle phase of the wave peak on the de-weighting boss set in the middle of the rotor, and record the change value of the corresponding unbalance amount after each material removal. Draw the obtained data into a curve diagram of ...
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The invention relates to a high-speed dynamic deflection control method for a slender flexible rotor. The method comprises the following steps: through installing a balance snap ring and a balance spacer, improving the authenticity and stability of the dynamic balance measurement, and converting the dynamic deflection index of the rotor to the unbalance index; through building the corresponding relation of the unbalance and the material-removing depth, achieving the once-finished accurate material-removing requirement, effectively guaranteeing the regularity of the material-removing surface, and reducing the damage of the rotor shaft body produced by removing the materials repeatedly. Through the method, the dynamic deflection index of the slender flexible rotor is not greater than 0.2 mm under 0-20000 revolution / minute of the revolving speed, and all working conditions have not the abnormal vibration and sound.
Description
technical field [0001] The invention relates to a method for controlling the dynamic deflection of a flexible rotor, in particular to a method for controlling the high-speed dynamic deflection of a slender flexible rotor, which is suitable for the high-speed dynamic deflection control technology of hollow, slender and super-intermediate rotors. Background technique [0002] Currently, for the dynamic balance of flexible rotors, the method of sticking the balance weight with adhesive tape is usually used for the measurement process of trial weight, and the method of multiple measurements, removing materials and re-measurement is used for correction until the dynamic deflection is qualified. That is, the dynamic balancing work is completed by starting and stopping the balancing machine multiple times. The process is generally: preparation of the workpiece and equipment → installation of the workpiece → dynamic balance measurement → pre-calibration with the balance block → a sma...
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IPC IPC(8): G01M1/38
CPCG01M1/34
Inventor 苗福华黄震李晓东张霄李野王莹陆红丽范国新王占山
Owner HARBIN DONGAN ENGINE GRP