针对阀控液压激振低能效的缺陷，提出一种新的激振方法。以作动缸、液压变压器和液压马达组成闭式回路，作动缸活塞杆连接振体，液压马达传动轴连接变量飞轮。振体振动时带动作动缸输出交变压力油，经变压器变压，驱动液压马达和飞轮摆动。飞轮摆动时其转动惯量能够跟踪振体运动节奏变化，在飞轮和振体之间引发动量循环，强化振动。动量循环没有节流损失，故而节能。液压变压器变压比调节范围大，弥补了大排量液压马达高频特性不良的缺陷，能有效扩展振动特性调节范围。构建了系统数学模型，对激振系统动力学性能进行了理论分析和 Matlab 仿真，表明变量飞轮的激振效果可通过变压系数和飞轮惯量调节系数调节，在适当条件下激振效果明显。%In view of the low energy efficiency of the hydro⁃vibration controlled by valve, a new method of vibration is put forward. An actuator and a hydro⁃motor constitute a closed circuit via a hydro⁃transformer. A vibrator is con⁃nected to the actuator, and the hydro⁃motor is connected to a variable inertia flywheel. When the vibrator vibrates, the actuator will be driven to pump alternating pressure oil, the motor with the flywheel is then driven to swing via the hydro⁃transformer. The rotating inertia of the flywheel can be changed according to the motion phase of the vi⁃brator, momentum cycles will thus arise between the flywheel and the vibrator and theirs vibration is intensified. There is no throttling loss in this way unlike the vibration controlled by valve, it is energy saving. Having large ad⁃justing range in transformer ratio the transformer could compensate the insufficient performance of the motor of large displacement at high frequency, and the adjusting range of vibration frequency could be extended. Theoretical anal⁃ysis and Matlab simulation shows that the vibration could be adjusted by the transformer ratio and the rate of mo⁃mentum change of the flywheel, and the vibration can be intensified obviously under proper conditions.
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