论文部分内容阅读
结构原理气动延时器的简单原理见图1,其动作情况如下;当输入信号P_c出现后,即向延时器进气,一路直达气室Ⅳ,另一路经气阻R进入气室Ⅱ。由于进气室Ⅳ为无阻充气,其压力立刻使膜片3凸起,封住下喷咀,阻止了气室Ⅱ向外排气,同时输入信号经过气阻R向气室Ⅱ缓慢充气,当气室Ⅱ内压力上升到一定程度时,膜片2堵住上喷咀,切断了气源P_s的排空通路,于是在输出口就有输出信号P_o,此输出信号和输入信号的时间间隔即为延时时间。当输入信号P_c消失后,气室Ⅱ内气体排空,输出信号P_o也消失。调节节流气阻孔道尺寸或气容容积,均可改变延时时间。
Structure Principle The simple principle of the pneumatic delay device is shown in Fig.1. The action is as follows. When the input signal P_c appears, it will enter the delay device and enter the gas chamber IV all the way. The other way will enter the gas chamber Ⅱ through the gas resistance R. As the intake chamber Ⅳ is unobstructed, its pressure immediately makes the diaphragm 3 bulge, sealing the lower nozzle, preventing the gas chamber Ⅱ from exhausting outwardly. At the same time, the input signal is slowly inflated to the gas chamber Ⅱ through the gas resistance R When the pressure in the gas chamber II rises to a certain extent, the diaphragm 2 blocks the upper nozzle and cuts off the emptying passage of the gas source P_s, so that there is an output signal P_o at the output port. The time interval between the output signal and the input signal For the delay time. When the input signal P_c disappears, the gas in the gas chamber II is exhausted and the output signal P_o also disappears. Adjust throttle orifice size or gas volume, can change the delay time.