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C620-1车床,大部分是60年代的产品。该机润滑油泵结构如图所示。其工作原理为:当活塞1向右移动时,A处压力高于泵体2内腔压力,钢球4打开,油经吸油管7进入油泵,完成吸油过程。当活塞1向左移动,油推动钢球4也同时向左移动,关闭吸油口,油压力升高,经排油口排出(排油口未画出)。这种泵有以下几点不足的地方:
C620-1 lathe, most of the 60’s products. The machine lubricating oil pump structure as shown. Its working principle is: When the piston 1 moves to the right, the pressure at A is higher than the pressure in the cavity of the pump body 2, the steel ball 4 is opened, and the oil enters the oil pump through the oil suction pipe 7 to complete the oil absorption process. When the piston 1 moves to the left, the oil pushes the steel ball 4 to move to the left at the same time. When the oil suction port is closed, the oil pressure rises and is discharged through the oil discharge port (the oil discharge port is not shown). This pump has the following deficiencies: