液压波动激振机理及其在模拟振动筛中的应用

研究液压波动机理，建立以激波器为激振执行机构的激波器-液压缸激振系统，并将激振原理应用于模拟振动筛，解决现有惯性激振存在的问题。系统的激振原理是通过激波器的强制配流在液压管路中产生周期性的液压冲击波，从而使活塞、活塞杆及其固结的负载不断地振动。将激振原理应用于模拟振动筛，并进行试验，研究了模拟振动筛不同工况、不同参数的振动控制规律。试验结果表明：模拟振动筛的振动频率受激波器激振频率的独立控制，振幅大小可通过溢流阀来调节；振幅一定时，压力随激振频率的提高而增大；压力一定时，振幅随激振频率的增加而减小。

Mechanism excited by hydraulic fluctuation and its application on simulation vibration screen

Studied on hydraulic fluctuation principle,and set up hydraulic exciting system consisted of wave exciter and hydraulic cylinder so that the exciting pinciple was applied on simulation vibration screen to solve the present problems in inertia shock excitation.The system exciting principle is that hydraulic shock waves are periodically produced in pipeline by wave exciter forcing flat so as to drive piston and piston rod as well as loads fixedon it periodic motion,that is exporting vibration.The hydraulic exciting pinciple was applied on simulation vibration screen and test was conducted to study its controlled law in diferent working conditions and various parameters.The test results prove that the vibration screen’s frequency is independently controlled by excitation frequency of wave exciter.And when its amplitude is defined,pressure is increasing with frequency improving.When its pressure is defined,its amplitude is decreasing with frequency improving.