JP2003315145A5 - - Google Patents

Claims (10)

３相モータと、前記３相モータによって回転させられる回転体とを有し、該回転体は定格運転においては連続回転させられることを前提に設計された、回転機械に対して、前記３相モータの各相に印加する電圧の振幅と相対的な位相差を所定の値に設定することで該３相モータの固定子と回転子を加振装置として機能させ、前記固定子と前記回転子の間に加振力を発生させ、該加振力によって引き起こされる前記回転機械の振動を、振動計測装置にて計測する点を特徴とする振動計測方法。A three-phase motor and a rotating body that is rotated by the three-phase motor, and the rotating body is designed on the assumption that the rotating body is continuously rotated in rated operation. By setting the amplitude and relative phase difference of the voltage applied to each phase of the three-phase motor to a predetermined value, the stator and rotor of the three-phase motor function as a vibration exciter, and the stator and rotor A vibration measuring method characterized in that an excitation force is generated in between and the vibration of the rotating machine caused by the excitation force is measured by a vibration measuring device. 前記３相モータの各相に印加する電圧の振幅と相対的な位相差を所定の値に設定することで、前記固定子と前記回転子の間に、該回転子の直径方向の直線加振力を発生させる点を特徴とする、請求項１に記載の振動計測方法。By setting the amplitude and relative phase difference of the voltage applied to each phase of the three-phase motor to a predetermined value, linear excitation in the diametric direction of the rotor is provided between the stator and the rotor. The vibration measuring method according to claim 1, wherein a force is generated. 前記３相モータの各相に印加する電圧の振幅と相対的な位相差を所定の値に設定することで、前記固定子と前記回転子の間に、該回転子の回転軸回りの回転加振力を発生させる点を特徴とする、請求項１に記載の振動計測方法。By setting the amplitude and relative phase difference of the voltage applied to each phase of the three-phase motor to a predetermined value, the rotation of the rotor around the rotation axis is increased between the stator and the rotor. The vibration measuring method according to claim 1, wherein a vibration force is generated. 前記３相モータの各相に印加する電圧の振幅と相対的な位相差を所定の値に設定することで、前記固定子と前記回転子の間に、該回転子の直径方向の直線加振力を発生させ、なおかつ、前記回転機械に対する前記直線加振力の加振方向を、特定の位相方向に設定する点を特徴とする、請求項１に記載の振動計測方法。By setting the amplitude and relative phase difference of the voltage applied to each phase of the three-phase motor to a predetermined value, linear excitation in the diametric direction of the rotor is provided between the stator and the rotor. The vibration measuring method according to claim 1, wherein a force is generated and the direction of excitation of the linear excitation force to the rotating machine is set to a specific phase direction. 前記印加電圧の周波数を変化させつつ、前記回転機械の振幅を測定することにより、該回転機械の共振周波数を測定することを特徴とする、請求項１乃至４に記載の振動計測方法。5. The vibration measuring method according to claim 1, wherein the resonance frequency of the rotating machine is measured by measuring the amplitude of the rotating machine while changing the frequency of the applied voltage. 6. 前記各相への印加電圧の何れか一つ以上及び前記回転機械の振動を同時に測定し共に記録する方法と、前記各相への印加電圧の何れか一つ以上及び前記回転機械の振動を互いに一定の時間間隔をあけて測定し共に記録する方法と、前記印加電圧の何れか一つ以上を監視し該印加電圧の監視結果が所定の条件を満たしたときのみ前記回転機械の振動を測定し記録する方法の、何れか１つの方法を採る点を特徴とする請求項１乃至５に記載の振動計測方法。A method of simultaneously measuring and recording any one or more of the applied voltages to each phase and the vibration of the rotating machine, and a method of simultaneously recording any one or more of the applied voltages to the respective phases and the vibration of the rotating machine. A method of measuring and recording together with a certain time interval, monitoring any one or more of the applied voltages, and measuring the vibration of the rotating machine only when the monitoring result of the applied voltage satisfies a predetermined condition. 6. The vibration measuring method according to claim 1, wherein any one of the recording methods is adopted. 前記回転機械表面の特定の線上、或いは、該表面の特定の領域内において、測定点を順次移動させつつ、該線上或いは該領域上の複数点で前記振動を測定する点に特徴を有する、請求項６に記載の振動計測方法。A feature is that the vibration is measured at a plurality of points on the line or the region while sequentially moving the measurement points on a specific line of the surface of the rotating machine or within a specific region of the surface. Item 7. The vibration measurement method according to Item 6. 前記３相モータに印加する電圧の内、２相のみを通電する点を特徴とする、請求項１乃至７に記載の振動計測方法。The vibration measuring method according to claim 1, wherein only two phases of the voltage applied to the three-phase motor are energized. レーザ光をプローブとして利用する振動計によって、前記回転機械に対して非接触の状態で振動を計測する点を特徴とする、請求項１乃至８に記載の、振動計測方法。The vibration measurement method according to claim 1, wherein vibration is measured in a non-contact state with respect to the rotating machine by a vibrometer using a laser beam as a probe. 回転機械の構造決定に際して、該回転機械の振動を請求項１乃至９の方法によって測定し、該測定結果を基に構造の修正有無を判断し、必要に応じて修正する点を特徴とする、回転機械の設計方法。When determining the structure of the rotating machine, the vibration of the rotating machine is measured by the method of claims 1 to 9 , and whether or not the structure is corrected is determined based on the measurement result, and is corrected if necessary. How to design a rotating machine.