RESERVOIR FOR LUBRICATING SYSTEM OF ROCK-DRILLING BIT Russian patent published in 2014 - IPC E21B10/24 

FIELD: mining.

SUBSTANCE: reservoir for lubrication of a support of a rock-drilling bit comprises an autonomous body with an insert bottom and a stop device, tightly installed and rigidly fixed in the hole of a tab at the side of the annular space, a separation element between the lubricant and washing liquid, making it possible to adjust pressure at the lubricant inside the reservoir, a conical threaded hole with a plug for filling of the lubricant, a side bore with an output hole on the wall of the body for connection with the channel of the lubrication system in the tab for vacuumisation of the support cavity and filling of the lubricant in it, and also a system of channels and holes for supply of the washing liquid inside the reservoir. The separation element is made as movable, in the form of a sealed piston, moving inside the reservoir depending on the pressure difference in the annular space and inside the support cavity, at the same time on its side surface there is a circular bore, connected with a hole to the inner cavity in the piston at the side of the lubricant, the top of which at the side of the washing liquid is equipped with a cut-through tab valve, which opens under excessive pressure of the lubricant in the support for its release and closes as pressure balances.

EFFECT: higher reliability and serviceability of a bit.

9 dwg