Adjusting mechanism for rotor centration by utilizing piezoelectric crystal

Abstract

The invention discloses an adjusting mechanism for rotor centration by utilizing a piezoelectric crystal, comprising a bearing-rotor system installed in a bearing block; the bearing block is installed in a shell through a plurality of groups of piezoelectric execution units distributed along an axial direction of the bearing block; each group of piezoelectric execution units comprises a pluralityof piezoelectric crystal actuators distributed along the circumferential direction of the bearing block; each piezoelectric crystal actuator comprises an end cap, a heat-shrinkable fin and a piezoelectric crystal, a circular truncated cone head of the piezoelectric crystal is matched with a corresponding conical hole in the bearing block, and the other end of the piezoelectric crystal is providedwith the heat-shrinkable fin embedded into the end cap connected with the shell through screw threads; and the deformation of the piezoelectric crystal is realized through changing the current in thepiezoelectric crystal actuators by utilizing an inverse piezoelectric effect of the piezoelectric crystal so that he position of the bearing block is changed; and the rotor position is changed through the bearing-rotor system, so that the aim for rotor centration is achieved. The invention has the advantages of simplicity and rapidness in centration and high precision.

Description

technical field [0001] The invention relates to the technical field of rotor centering, in particular to an adjustment mechanism for rotor centering using piezoelectric crystals. Background technique [0002] Misalignment is extremely harmful to the smooth operation of the rotor system. It will cause equipment vibration, bearing wear, shaft deflection, and friction between the rotor and the stator. A chemical company in the United States found in 5 years of vibration practice that among the many common faults of rotating machinery, shafting faults caused by rotor misalignment accounted for about 60% of the total faults. Misalignment is so common in rotating machinery, mainly due to the difficulty of finding and adjusting the misalignment and low precision. [0003] With the application of laser testing technology in the alignment work, the misalignment alignment of the rotor becomes simple and fast, and the alignment accuracy is about 10 times higher than the traditional me...

AI Technical Summary

Problems solved by technology

However, centering adjustment technology is relatively lagging behind

At present, the centering adjustment is still achieved by traditional methods such as moving the machine base and placing gaskets under the base of the machine base. This requires repeated measurements and repeated adjustments. The adjustment cycle is long and labor-intensive. Not only is it time-consuming and labor-intensive, but also the adjustment accuracy is difficult. ensure

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