译文：
　电磁阀设计要解决的主要问题是密封问题,必须通过对电磁力、弹簧力和气体压力的计算确保电磁阀断电时气路被隔断,在通电时电磁力能够克服弹簧力和气体压力迅速打开气路。同时合理设计密封结构,选用合适的材料保证电磁阀在高温(+50℃)和低温(-20℃)环境中正常工作。 1、电磁阀结构设计 要实现电磁阀密封要求,首先要保证主要密封件的结a构设计合理,加工容易保证。参考进口减压阀的工作原理,进行了如下改进设计。 1.1、阀杆的设计 进口电磁阀的密封形式是利用阀杆两端锥面,通过阀杆的移动分别密封入口端和放气口端。这种密封形式要求阀杆的加工精度很高,特别是阀杆两端锥面的同轴度要求在0.01mm以内。这两锥面用一般数控机床加工必须经过在两次定位分别加工,锥面同轴度要求很难保证,因此进口电磁阀在使用过程中性能很不稳定,使用寿命较短,而国内传统电磁阀只能应用于低压工作范围,图2为阀杆工作原理图。 在电磁阀的设计当中,通过改变阀杆结构形式,将原来阀杆两端锥面密封形式改为一侧端面密封,另一侧保持锥面密封。这样锥面的同轴度和端面的垂直度和跳动度用普通数控机床可以在一次定位中加工出来,阀杆的设计精度就比较容易保证,同时降低了加工成本。 在该磁系统的磁路中,由于工作气隙较小,故虽然存在漏磁通,但相对于主磁通来说可以忽略,故由《平衡力电磁铁设计计算及实验研究》中电磁铁对衔铁的吸力F为: 所以,μ0=275.56×103; 　

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原文：
Solenoid valve designed to solve the main problem is the sealing problem, must be through the electromagnetic force, spring force and gas pressure of solenoid valve power calculation to ensure that when the gas line was cut off, when the electromagnetic force in the power to overcome the spring force and the gas pressure rapidly open gas line. At the same time rational design seal structure, using appropriate materials to ensure high temperature solenoid valve (+50 ℃) and low temperature (-20 ℃) work environment. 1, electromagnetic valve structure design Solenoid valve sealing requirements to achieve, we must first ensure that the main seal knot a structure designed, easy to guarantee processing. Reference imported valve works, for the following improvement of the design. 1.1, the design of stem Imported electromagnetic valve stem seal both ends of the use conical form, moving through the valve stem seals were deflated entrance and exit side. This seal forms required high precision valve stem, in particular the stem ends of the coaxial cone requires less than 0.01mm. The two general CNC machining with a cone must be processed separately in the two orientation, cone coaxial is very difficult to guarantee, imported electromagnetic valve in the course of the performance is very unstable, short life, the domestic traditional electromagnetic the scope of work can only be used in low pressure valve, Figure 2 shows the schematic stem work. In the solenoid valve designs, by changing the stem structure, sealed cones at both ends of the original form of the stem to the side of the seal, the other side of the cone to keep sealed. This cone of concentricity and face runout vertical degree and CNC machine tools with a common location in a process out of the valve stem is easier to ensure design accuracy, while reducing the processing cost. Magnetic circuit of the magnetic system, due to small working air gap, so although there are leakage flux, but compared with the main magnetic flux is negligible, so the "balance force calculation and experimental study of electromagnetic design" in the electromagnet suction on the keeper of F is: Therefore, μ0 = 275.56 × 103;