Jet flow type shocker executing mechanism

Abstract

The invention discloses a hammer drill, in particular to an actuator of a jet impacting machine. The actuator mainly adopts an output channel of a jet component to be communicated with an eccentric flow channel arranged on an upper part of a core barrel, and an eccentric flow channel is communicated with an upper cavity, while the other eccentric flow channel is communicated with a piston central hole through a central hole of the core barrel. The lower parts of the core barrel and the piston central hole are provided with the same shaft and are matched with each other. A cylinder is divided into an upper cavity and a lower cavity by the piston, wherein, the upper cavity and the lower cavity are communicated through the piston central hole when in an anti-useless striking. Inclined holes which are of the same angle and distributed around a circle are arranged between the bottom of the piston central hole and a lower end face of the piston. A lower section of a strike regulating sleeve is statically inserted into an upper section of an inner cylinder, and a length of the inserted part of the strike regulating sleeve can be chosen, and the strike regulating sleeve of different lower-part length can be chosen according to the an impact work and an impact frequency requirement. The invention changes an upper and lower flow channels structure of the existing jet impacting machine, and overcomes the problems that a sealing between the main parts of the jet impacting machine is apt to fail.

Description

technical field [0001] The invention relates to a rock drilling machine, in particular to a jet type impactor actuator. Background technique [0002] The jet-type hydraulic impactor using the bistable jet element as the control mechanism is a new type of hydraulic impactor created by our country. The working principle of this kind of hydraulic impactor is: the surface water pump (or mud pump) delivers high-pressure flushing medium to the bottom of the hole impactor, and the high-pressure flushing medium enters the jet element to produce jet flow attachment and switching, so that the impactor forms a high-frequency Impact, the impact energy is transmitted to the drill bit at the bottom of the hole to break the rock. [0003] The jet type hydraulic impactor is generally composed of a jet element, a cylinder, a piston arranged in the inner cavity of the cylinder, a piston rod, and an upper cavity, a lower cavity, and a hammer that divide the inner cavity of the cylinder by the...

AI Technical Summary

Problems solved by technology

There is a potential risk of seal failure due to cracking of the welded part during use of this sealing method

In addition, there are other ways to seal between the main parts of the jet impactor, but due to the limitations of the existing jet impactor cylinder itself and the use conditions, the seal between the main parts of the jet impactor The problem has not been fully resolved

The liquid flow channel in the lower cavity of the cylinder body of the current jet-type hydraulic impactor is formed by assembling the strip-shaped gap on the outer wall of the cylinder body and the inner wall of the outer cylinder body. There are many sealing methods, but they are limited by the structural form of the cylinder body of the impactor body. Influenced by conditions and conditions of use, there are deficiencies in each sealing method, which makes the seal between the main components of the jet hydraulic impactor prone to failure, thereby affecting the normal work of the impactor

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