水下液压冲击铲关键技术分析

Analysis of key technology of underwater hydraulic impulsion shovel

对水下液压冲击铲的氮气室与冲击活塞系统压力进行了分析.利用高压氮气对活塞杆的冲击能的影响的分析,推导出了冲击铲结构设计时几个结构参数的关系式,对设计起指导作用.通过对高压氮气影响活塞杆的运动速度进行分析,对此冲击铲中高压氮气室的作用进行了验证.活塞系统压力的变化规律是冲击铲工作原理能否实现的关键,从活塞杆的受力方程入手,采用数值分析、曲线拟合等方法,推导出了活塞系统压力的表达式,并对其进行了分析,获得了冲击铲正常工作所需要的系统压力的变化规律,同时也选择了合适的蓄能器容积,以此可以检验设计的正确性.

In the article, the nitrogen and system pressure of underwater hydraulic impulsion shovel was analyzed. Through analyzing the influence of high-pressure nitrogen on impulsion energy, relative expression of three structural parameters in design was deduced to guide the design. The influence of nitrogen on velocity of the cylinder was analyzed to validate the function of the nitrogen chamber. The changing law of system pressure is the key to realization of the impullsion shovel＇s working principle. According to kinetic equation of the cylinder,some mathematic methods are adopted to deduce expression of system pressure of the piston. The equation of system pressure is analyzed and the changing law of system pressure,which is required by the right work of impulsion shovel,is obtained. In the course,the volume of the accumulator is chosen so that the design can be checked.