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自1938年,第一台自行式铲运机,在美国问世以来,铲运机的发展已走过了近五十年的历程,在这期间,主要沿着两条途径提高铲运机的生产效率:1.改善铲运机的牵引性能;2.改进铲运机的工作装置。后者的发展,又沿着两个方向进行:①研制铲土阻力小的装置;②设计各种装载机构,以降低所切出土屑在铲斗内的运动阻力。一、双铲刀工作装置铲运机双铲刀工作装置工作循环见图1。这种双铲刀结构,铲运机单独使用前铲刀作业,也可用两片铲刀同时作业。当用两个铲刀作业时,液压油缸可控制铲刀相对于固定
Since the first self-propelled scraper was introduced in the United States in 1938, the development of the scraper has come a long way in the past 50 years. During this period, the scraper’s production was mainly improved in two ways. Efficiency: 1. Improve the traction performance of the scraper; 2. Improve the working device of the scraper. The development of the latter has proceeded in two directions: (1) the development of a device with low resistance to shoveling soil; (2) the design of various loading mechanisms to reduce the movement resistance of the cut soil debris in the bucket. First, double blade work device Scraper Double blade work device working cycle shown in Figure 1. This double-blade structure, scraper operation before using the scraper alone, can also use two blades to work at the same time. Hydraulic cylinder controls blade relative to stationary when working with two blades