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一、问题的提出液动冲击回转钻近年获得很大发展。我国在1983年也用此法进尺12万米。勘探技术研究所研制的YZ-54-Ⅱ型至83年进尺4300米，据调查结果，每进尺1米约节约5.8元，故全国因此节约建设投资最少约70万元。液动冲击回转钻尽管取得可观进展，但仍存在一些问题。其中之一是冲击器功率小，单次冲击功和冲击频率都不大。有资料证明，单次冲击功从7.5提高到10公斤·米时，初始钻进速度将提高到1.26倍，而增加至20公斤·米时，初始钻速将增加到3.3倍。现
I. Problems raised Liquid-impact rotary drills have achieved great development in recent years. In 1983, China also used this method to measure 120,000 meters. The YZ-54-II type developed by the Exploration Technology Research Institute reached a depth of 4300 meters in the year 83. According to the survey results, the saving of 5.8 yuan per meter of 1 meter leads to a saving of at least 700,000 yuan in investment across the country. Although the hydraulic impact rotary drill has made considerable progress, there are still some problems. One of them is that the impactor power is small, and the single impact power and impact frequency are not large. According to data, the initial drilling rate will increase to 1.26 times when the single impact energy is increased from 7.5 to 10 kilograms per meter, and the initial drilling rate will increase to 3.3 times when the impact energy is increased to 20 kilograms per meter. Now