【摘要】：三相屏蔽電機是屏蔽電泵專屬特種電機,該電機的性能優(yōu)劣對系統(tǒng)振動噪聲有很大影響。屏蔽電機氣隙內(nèi)的旋轉(zhuǎn)磁場在定子屏蔽套中感應(yīng)出渦流,除產(chǎn)生屏蔽套渦流損耗外,該渦流還將與氣隙合成磁場相互作用形成徑向和切向高頻電磁激振力�？紤]到定子屏蔽套是薄壁件,與定子齒冠間存在一定的安裝間隙,所以在電磁激振力下定子屏蔽套將產(chǎn)生電磁振動和噪聲。首先從解析的角度推導(dǎo)得到了徑向和切向電磁激振力的數(shù)學(xué)表達式,進而采用有限元法計算定子屏蔽套典型位置點磁通密度時間諧波和圓周方向上磁通密度空間諧波分布規(guī)律及諧波含量,得到了不同屏蔽套材質(zhì)時的渦流電流密度分布。計算了定子屏蔽套采用哈氏合金時的電磁激振力變化曲線,并與解析計算結(jié)果進行了橫向?qū)Ρ?驗證了解析計算的正確性。最后,計算分析定子屏蔽套的工作模態(tài)和在電磁激振力作用下的機械形變,為后續(xù)屏蔽電機的減振降噪提供理論依據(jù)。
[Abstract]:Three-phase shielded motor is the exclusive special motor of shielded electric pump. The performance of the motor has a great influence on the vibration and noise of the system. The rotating magnetic field in the air gap of the shielded motor can induce the vortex in the stator shield sleeve. In addition to the Eddy current loss of the shield sleeve, the vortex will also interact with the air gap synthetic magnetic field to form radial and tangential high frequency electromagnetic excitation forces. Considering that the stator shield is a thin-wall part and there is a certain installation gap between the stator shield and the stator crown, the stator shield will produce electromagnetic vibration and noise under the electromagnetic excitation force. Firstly, the mathematical expressions of radial and tangential electromagnetic excitation forces are derived from the analytical point of view. Then the finite element method is used to calculate the time harmonics of the magnetic flux density at the typical position point of the stator shield sleeve and the spatial harmonic distribution of the magnetic flux density in the circumferential direction, and the Eddy current density distribution of different shielding sleeve materials is obtained. The variation curve of electromagnetic excitation force of stator shield sleeve with Hart alloy is calculated and compared with the analytical results to verify the correctness of the analytical calculation. Finally, the working mode of the stator shield sleeve and the mechanical deformation under the action of electromagnetic excitation force are calculated and analyzed, which provides a theoretical basis for the subsequent vibration reduction and noise reduction of the shielded motor.
【作者單位】： 哈爾濱工程大學(xué);
【基金】：哈爾濱市(科技創(chuàng)新型人才)項目(2014RFQXJ098) 哈爾濱市應(yīng)用技術(shù)研究和開發(fā)項目(2015RAXXJ002)資助
【分類號】：TM35

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