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一机部于1978年1月16日至24日在北京召开了直流拖动牙轮钻机磁放大器供电装置生产技术坐谈会。参加会议的有23个单位32名代表。会议听取了牙轮钻机回转直流电机(ZYZ-50/15,50千瓩)及磁放大器供电装置(KYC-1/65,65千瓦)的设计、制造、出厂试验和工业试验的报告,并到首钢大石河铁矿现场观看了作业表演和坐谈。直流电机及磁放大器供电装置于1976年2月安装在大石河铁矿 KY-250型牙轮钻机上,经过一年多的连续作业运行,在硬度系数 f=8～14的矿岩中,共穿凿矿石13082米。最高月穿
A machine department in January 16, 1978 to 24 in Beijing held a DC drag roller cone magnetic amplifier power supply device production technology symposium. There were 32 representatives from 23 units participating in the conference. The meeting heard the design, manufacture, factory test and industrial test report of the rotary drill DC rotary motor (ZYZ-50/15, 50K) and magnetic amplifier power supply (KYC-1 / 65,65KW) Shougang Dashihe Iron Mine site to watch the performance and sitcom. DC motor and magnetic amplifier power supply device installed in February 1976 Dashihe iron mine KY-250 type cone drill, after more than one year of continuous operation, the hardness coefficient f = 8 ~ 14 of the ore, a total of Wear chisel ore 13082 meters. The highest monthly wear