The impactor basic structure in general by the gas distribution mechanism, both inside and outside the cylinder, piston components.

By changing the inlet and exhaust direction, can realize the piston in the cylinder continuously reciprocating movement, thereby also can constantly repeated impact drill bit, this is the most simple impactor principle and process.

Speed depends mainly and the impacter frequency, size and physical mechanical properties of rock drilling. The general speed of 20 revolutions per minute or so to choose good, speed is too high will cause bit severely wear and drilling efficiency is reduced, because of DTH hammer in Qigong is impacting breaking rock, rotary speed to change bit alloy shock rock breaking position, to avoid duplication of broken, therefore, reasonable speed should be guaranteed in the best impact spacing range.

The United States of America well learn Kang burr believed in hard rocks two impact between optimal angle is 11 DEG, which advocates the drill spindle speed in the range of 18 ~ 30R / min. There is also the domestic scholars think, the drilling rate selection in 20 ~ 50 rpm it is more reasonable to use low speed, hard rock, soft rock selection for higher speed.

冲击器的基本结构一般由配气机构、内外缸、活塞几部分组成。

 通过不断改变进排气方向**可实现活塞在气缸内的不断往复运动，从而也能不断反复冲击钻头，这**是冲击器工作的**原理和过程。

 转速的高低主要和冲击器的冲击频率，规格大小以及钻岩的物理机械性质有关。一般转速选用每分钟20转左右为好，转速过高会造成钻头的严惩磨损和钻进效率的降低，由于气功潜孔锤进是以冲击碎岩的，回转速度为改变钻头合金的冲击破岩位置，避免重复破碎，因此，合理的转速应保证在**优的冲击间隔范围之内。
美国水井学会康伯尔认为在硬岩中两次冲击之间的**优转角为11°，因而主张钻机立轴转速在18～30r/min。也有国内学者认为，钻速选择在20～50转/分是比较合理的，对于硬岩层选用低转速，对于软岩层选用较高转速。

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