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一种由两位三通激振阀和单作用缸组成高频电液颤振器,高频激振阀采用转阀结构,控制油液交替进出液压缸,从而使弹性端盖产生受迫振动。采用AMEsim分析了液压颤振器的低频振动特性。实验中测量了不同压力与不同弹性端盖质量时电液颤振器在1 Hz~4 000 Hz的振动频率下的压力、加速度、位移以及流量特性。分析表明,高频激振阀的工作频率可以达到4 000 Hz,激振器的谐振频率为320 Hz时,谐振时弹性端盖振动振幅明显增加,此时颤振器所需输入功率很小,最理想的工作频率为320 Hz。
A high-frequency electro-hydraulic flutter composed of a two-position three-way excitation valve and a single-action cylinder, the high-frequency excitation valve adopts a rotary valve structure to control the oil to alternately enter and leave the hydraulic cylinder so as to make the elastic cover generate forced vibration . AMEsim was used to analyze the low frequency vibration characteristics of hydraulic flutter. In the experiment, the pressure, acceleration, displacement and flow characteristics of the electro-hydraulic flutter were measured under the vibration frequency of 1 Hz ~ 4 000 Hz under different pressures and different elastic end caps. The analysis shows that the operating frequency of the high-frequency excitation valve can reach 4 000 Hz and the vibration frequency of the exciter is 320 Hz, the vibration amplitude of the flexible end cap increases obviously when the vibration occurs. At this moment, the input power of the flutter is small, The ideal working frequency is 320 Hz.