FIELD: mining.
SUBSTANCE: invention refers to bearings of rolling drilling bits, which include leg with trunnion, which are provided with oil supply channels, cutter fixed on trunnion by means of lock bearing, and sealing elastic ring arranged in groove. Peculiarity of the proposed bearing is that groove for sealing assembly is located to longitudinal axis of trunnion at an angle different from perpendicular. Upper part of groove for sealing ring is offset relative to its lower part towards the bit axis.
EFFECT: improvement of sealing reliability and protection of the bearing cavity against slurry penetration, which increases service life of the bearing and bit as a whole.
2 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SEALED BEARING STRUCTURE OF DRILLING BIT | 2011 |
|
RU2465428C1 |
| SEALED DRILLING BIT BEARING ASSEMBLY | 2009 |
|
RU2386007C1 |
| SUPPORT OF DRILLING ROLLER CUTTING TOOL | 2007 |
|
RU2342513C1 |
| SUPPORT OF BORING ROCK DESTRUCTING TOOL (VERSIONS) | 2007 |
|
RU2338864C1 |
| ROLLER CUTTER DRILLING TOOL BEARING ASSEMBLY (VERSIONS) | 2008 |
|
RU2377382C1 |
| SUPPORT OF DRILLING ROLLER CUTTING TOOL | 2007 |
|
RU2342512C1 |
| SUPPORT OF ROLLING CUTTER DRILLING TOOL | 2010 |
|
RU2452843C1 |
| SUPPORT OF CONE BIT | 2007 |
|
RU2351740C1 |
| DRILLING BIT BEARING STRUCTURE | 2007 |
|
RU2346133C1 |
| SUPPORT FOR CUTTER DRILL BIT | 2007 |
|
RU2351738C1 |
