摘要
为了减小混凝土泵车工作时的液压冲击,分析混凝土泵车泵送系统工作原理,利用功率键合图方法建立某款混凝土泵车泵送系统的仿真模型,在验证模型准确的基础上,对该系统缓冲结构中不同孔径阻尼孔的缓冲效果进行对比仿真。结果表明:缓冲效果与阻尼孔的孔径有直接关系,孔径越大活塞的顶缸速度越小,系统工作时的液压冲击与振动越小,但却增加了换向时间,从而降低了泵送频率,影响了工作效率。在实际设计中应综合考虑这两方面因素,适当地选择阻尼孔的孔径。
In order to relieve the hydraulic shock and cylinder vibration during work of the concrete pumping truck, work principle of the pumping hydraulic system in concrete pumping truck was analyzed. The complete simulation model of pumping circuit was set up, based on power bond graph. Comparative simulations of the pumping hydraulic system with different damping orifice diameters in the buffer structure were carried out on the basis that the model was proved to be correct. The conclusions show that the buffer effect has a direct relationship with orifice diameter. If the orifice diameters become bigger, the piston speed is lower. This may relieve the hydraulic shocking and cylinder bumping effectively, but the reversal time is increased. Then pumping frequency is reduced, and work efficiency is influenced. So in practical design, both of them should be considered and appropriate orifice diameters should be chosen.
出处
《机床与液压》
北大核心
2011年第13期110-113,共4页
Machine Tool & Hydraulics
关键词
混凝土泵车
键合图
阻尼孔
仿真
Concrete pumping truck
Power bond graph
Damping orifice
Simulation
