Device and method related to lubrication of components in a rock drilling machine and rock drilling machine

1. Device in respect of a hydraulic rock drilling machine ( 1 ) with a machine housing ( 2 , 3 , 11 ), which encloses a hydraulic percussion device, a rotation mechanism ( 4 ) for rotation driving a shank adapter ( 10 ) and a guiding device ( 6 ) for the shank adapter, being arranged in the machine housing, wherein the rock drilling machine includes:

at least one supply channel for lubricant to components in the rock drilling machines being intended for lubrication, and

at least one outlet channel ( 5 , 7 ) for used lubricant, wherein

said at least one outlet channel ( 5 , 7 ) is connected to a separation chamber ( 8 ) being arranged in the region of the machine housing for separating particle-shaped impurities existing in used lubricant, and

the separation chamber ( 8 ) is connected to a discharge conduit ( 9 ) for used lubricant treated therein.

2. Device according to claim 1 , wherein said discharge conduit ( 9 ) emanates from a pipe portion, which is protruding inwards into the separation chamber ( 8 ), which provides a free end ( 9 ′) inside the separation chamber ( 8 ).

3. Device according to claim 2 , wherein the separation chamber ( 8 ) includes at least one collecting pocket ( 13 ) in an area surrounding a connection of said discharge conduit ( 9 ) in the separation chamber ( 8 ).

4. Device according to claim 2 , wherein, as seen in a flow direction (R) for used lubricant, an area of a section of the separation chamber ( 8 ) amounts to 3-20 times and more preferred 7-15 times an area of a section of the discharge conduit ( 9 ).

5. Device according to claim 1 , wherein the separation chamber ( 8 ) includes at least one collecting pocket ( 13 ) in an area surrounding a connection of said discharge conduit ( 9 ) in the separation chamber ( 8 ).

6. Device according to claim 5 , wherein, as seen in a flow direction (R) for used lubricant, an area of a section of the separation chamber ( 8 ) amounts to 3-20 times and more preferred 7-15 times an area of a section of the discharge conduit ( 9 ).

7. Device according to claim 1 , wherein, as seen in a flow direction (R) for used lubricant, an area of a section of the separation chamber ( 8 ) amounts to 3-20 times and more preferred 7-15 times an area of a section of the discharge conduit ( 9 ).

8. Device according to claim 1 , wherein an outlet channel ( 5 ) emanates from the rotation mechanism ( 4 ).

9. Device according to claim 1 , wherein an outlet channel ( 7 ) emanates from the guiding device ( 6 ).

10. Device according to claim 1 , wherein the separation chamber ( 8 ) is arranged in the machine housing ( 2 , 3 , 11 ).

11. Device according to claim 10 , wherein the separation chamber ( 8 ) is arranged in connection to a dividing section ( 14 ) in the machine housing in order to be openable when dividing the machine housing along said dividing section.

12. Device according to claim 1 , wherein the separation chamber is arranged outside the machine housing.

13. Rock drilling machine including a device according to claim 1 .

14. Method for lubricant handling in a hydraulic rock drilling machine ( 1 ) with a machine housing ( 2 , 3 , 11 ), which encloses a hydraulic percussion device, a rotation mechanism ( 4 ) for rotation driving a shank adapter ( 10 ) and a guiding device ( 6 ) for the shank adapter, being arranged in the machine housing, wherein the method includes:

pressurized air driving lubricant to components in the rock drilling machines being intended for lubrication over at least one supply channel, and

discharging used lubricant over at least one outlet channel ( 5 , 7 ),

wherein:

used lubricant is led to a separation chamber ( 8 ) being arranged in the region of the machine housing ( 1 ) for separating particle-shaped impurities existing in used lubricant, and

used lubricant treated in the separation chamber ( 8 ) is discharged over a discharge conduit ( 9 ).

15. Method according to claim 14 , wherein said particle-shaped impurities are collected in at least one collecting pocket ( 13 ) in an area surrounding a connection of said discharge conduit ( 9 ) in the separation chamber ( 8 ).

16. Method according to claim 15 , wherein used lubricant is led to the separation chamber ( 8 ) from the rotation mechanism ( 4 ).

17. Method according to claim 15 , wherein used lubricant is led to the separation chamber ( 8 ) from the guiding device ( 6 ).

18. Method according to claim 14 , wherein used lubricant is led to the separation chamber ( 8 ) from the rotation mechanism ( 4 ).

19. Method according to claim 18 , wherein used lubricant is led to the separation chamber ( 8 ) from the guiding device ( 6 ).

20. Method according to claim 14 , wherein used lubricant is led to the separation chamber ( 8 ) from the guiding device ( 6 ).