论文部分内容阅读
图1所示为一台国外引进气动设备上的一个小型电磁阀的结构原理图。这是一个先导式二位三通截止阀。主阀由阀体、阀座、阀芯(由阀芯杆、小密封垫、大密封垫组成)和端盖构成。旋出端盖,可将阀座连同阀芯一起从阀体中取出。阀的工作原理是:电磁先导阀的线圈断电时,在弹簧的作用下,动铁芯下部的胶垫堵住喷口a,切断气源通往主阀芯右端的气路,主阀阀芯右端腔室与先导阀排气口b相通,大密封垫8的右侧无气压作用,而主阀阀座内腔与气源P相通,压缩空气同时作用在大密封垫8的左侧与小密封垫4的右侧,但由于它们的受压面积不等,
Figure 1 shows the introduction of a foreign pneumatic equipment on the structure of a small solenoid valve schematic. This is a pilot-type two three-way globe valve. The main valve by the valve body, seat, spool (by the valve stem, a small seal, composed of a large seal) and cover composition. Unscrew the end cap to remove the valve seat together with the valve seat from the valve body. The working principle of the valve is: when the coil of the electromagnetic pilot valve is powered off, under the action of the spring, the rubber pad at the lower part of the moving iron core blocks the spout a, cuts off the gas path leading to the right end of the main valve core, the main valve plug The right end of the chamber communicates with the exhaust port b of the pilot valve, there is no air pressure on the right side of the large seal 8, and the inner cavity of the main valve seat communicates with the air source P, while the compressed air acts on the left side of the large seal 8 at the same time The right side of the gasket 4, but because of their pressure area is not equal,