A POWER TRANSMISSION UNIT OF AN IMPACTOR, A HYDRAULIC JET IMPACTOR AND THE APPLICATION THEREOF

摘要

The present invention relates to a power transmission unit of an impactor and a hydraulic jet impactor. A rubber seal of hydraulic jet impactor was subject to corrode and so did the hole of a upper splite-flow cap in the past, so that the impactor single-time service life was reduced, and also because of so many parts, the transmission unit had a low efficiency. In order to raise the velocity of drilling well and/or elongate impactor single-time service life, a passage located in a side wall is formed by separating waterproof seal in respect to inner wall of outer sleeve, so that said rubber seal could be omitted, then a anvil of the transmission unit is combined with its lower joint so that impacting power loss is reduced during the transmission. A nozzle of which the material made from is more antifriction than that of splite-flow cap's does is provided in said splite-flow hole. Especially, the nozzle is one of nozzles whose inner diameters are different with each other so that various flow requirements could be met by replacing a nozzle and abrasion of splite-flow hole would be relieved effectively.