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南芬露天铁矿于1974年从美国B—E公司引进三台60—R(Ⅲ)型牙轮钻机和四台45—R牙轮钻机。 这些牙轮钻机的主空压机叶片、上阀组和下阀组的备件除引进时随机带来外,一直靠美国进口。为了降低成本,维持生产,我们对这些部件进行了改制和修旧应用。 1.主空压机叶片的改制利用 我们将60—R(Ⅲ)型牙轮钻机主空压机几年来换下来的废旧叶片(见图1)经过挑选,基本上按45—R牙轮钻机主空压机叶片(见图2)的尺寸,设计专用卡
Nanfen open-pit mine imported three 60-R (Ⅲ) -type roller rigs and four 45-R roller-cone drilling rigs from American B-E Company in 1974. The main air compressor blades, the upper valve set and the lower valve set spare parts of these roller cone drilling rigs have been imported from the United States except during their introduction. In order to reduce costs and maintain production, we have adapted and repaired these components. 1. Main Air Compressor Blade Retrofit We have selected the used blades (see Figure 1) replaced by the main air compressor of the 60-R (Ⅲ) The main air compressor blades (see Figure 2) size, design special card