LUBRICATION SYSTEM OF DRILL ROLLER BIT WITH SEALED SUPPORTS Russian patent published in 2013 - IPC E21B10/24 

FIELD: mining.

SUBSTANCE: lubrication system of a drill roller bit with sealed supports includes a unit of lubrication compensation in a support and a system of channels and cavities, which connect a unit of lubrication compensation with friction zones in the support. In a lock finger there are two cavities, which do not communicate with each other, one of which provides for supply of lubricating material from an oil reservoir via a long channel into the support cavity, and the other one in combination with the hole along the journal axis provides for discharge of the spent lubricating material from the support cavity. Additionally there are two valves and a permanent magnet, at the same time the inlet valve is mounted in a hole along the journal axis of the support end of the journal, the outlet valve is mounted into the lock finger, near the back of the leg, and the permanent magnet is arranged in the cavity of the lock finger, communicating with the hole along the journal axis. The lubricating system is filled with a lubricating oil with extreme pressure additives.

EFFECT: increased durability of a drill bit support, possibility to replace a lubricating material in a friction zone in process of bit operation.

1 dwg