一、问题的提出:原设计和正在运行中的40kg/cm~2油隔离泵均是沿引日本结构仿制的锥伐结构。这种结构在我国运转过程中出现一些缺点,主要有:(一)磨损快。据资料介绍,“一般的伐芯、伐体、弹簧和锁板只能使用7—10天,最多使用15天就要更换”,因此备品配件更换频繁,检修周期短,既不安全也不经济。弹簧一般采用65Mn 弹簧钢制成,按40kg/cm~2油隔离泵冲次为50次/分、寿命为14天计算,这种钢材的疲劳寿命约为100万次,而日本弹簧钢疲劳寿命达到1000万次,寿命高出10倍,当然 First, the issue put forward: The original design and running 40kg / cm ~ 2 oil pump are imported along the Japanese structure imitation of the tapered cutting structure. This structure in the operation of our country there are some shortcomings, there are: (A) wear fast. According to the information, “the general cutting core, cutting body, spring and lock plate can only be used for 7-10 days, up to 15 days to be replaced,” spare parts replacement frequent, maintenance cycle is short, neither safe nor economical . Spring is generally made of 65Mn spring steel, according to 40kg / cm ~ 2 oil pump stroke for 50 times / min, life expectancy of 14 days, the fatigue life of this steel is about 1 million times, while the Japanese spring steel fatigue life Reached 10 million times, life expectancy 10 times higher, of course