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引言六十年代以后,世界各国较普遍地采用了液压技术,我国的液压技术也有了迅速地发展,伸缩油缸的应用也随着四个现代化的推进而日益广泛起来。伸缩油缸由于形似阶梯,故又称阶梯式油缸。对于自卸卡车、煤矿液压支柱,起重机伸缩臂和火箭发射台等装置,安装空间受到限制而行程要求很长时,都已采用了伸缩油缸。
INTRODUCTION Since the 1960s, hydraulic technologies have been widely adopted in all countries in the world. The hydraulic technology in our country has also been rapidly developed. The application of telescopic cylinders has also become increasingly widespread with the promotion of four modernizations. Telescopic cylinder as a result of the ladder, it is also known as ladder-type cylinder. For dump trucks, hydraulic props in coal mines, crane telescopic arms and rocket launchers and other devices, the installation space is limited and the travel requirements are long, have adopted a telescopic cylinder.