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一、“电铲特性”电铲的工作条件是很恶劣的,它在挖掘过程中所迂到的岩石阻力变化很大。因而要求机器必须适应这种工作条件,才能充分发挥机器的能力,提高工作效率。即当负载不十分大时,机器的出力和运转速度可以充分发挥;当负载很大时,机器的出力被限制在一定的范围内,甚至处于停止状态,机器的这种要求称之为“电铲特性”,如图1所示。这种特性有下垂的特点。当负载小于某一负载M_j(称之为
First, the “shovel characteristics” Shovel working conditions are very poor, it is in the process of mining the rock resistance changes vary widely. Therefore, the machine must be adapted to such working conditions in order to give full play to the capability of the machine and improve work efficiency. That is, when the load is not very large, the output and speed of the machine can give full play to; when the load is large, the output of the machine is limited to a certain range, or even in a stopped state, the machine called this “electricity Shovel characteristics ”, as shown in Figure 1. This feature has the characteristics of sagging. When the load is less than a certain load M_j (call it