JP2013057400A5 - - Google Patents

Claims (7)

A bearing saddle (11) integral with the connecting rod (7);
Has a single bearing surface which is supported on the bearing saddle (11), a lower bearing shell (12),
Two axially running lubricating grooves (22) or lubricating row holes provided on the bearing surface of the lower bearing shell (12) or the surface of the crosshead journal (4) facing the lower bearing shell (12) When,
A bearing cap (6) fixed to the bearing saddle (11) ;
A crosshead bearing (1) for a large two-cycle engine comprising:
The crosshead bearing (1) is rotatable around a crosshead journal (4), and the crosshead journal (4) has an axial hole (5) for passing lubricating oil supplied under pressure. ) And a hole (15) extending radially from the axial hole (5) to the surface of the journal facing the bearing cap (6), provided that the radial hole (15) At least one flow path (16, 16) reaching the axial lubricating groove (22) or the lubricating row hole of the lower bearing shell (12) in at least part of the swinging process of the connecting rod (7). 18, 19, 20, 20 ′, 21)
The flow paths (16, 18, 19, 20, 20 ', 21) are axially arranged to deliver lubricating oil from the axial holes (5) to the lubricating grooves (22) or the lubricating row holes. Run from the hole (5) to the lubricating groove (22) or the lubricating row hole, and the flow path (16, 18, 19, 20, 20 ', 21) is substantially adjacent to the bearing surface. And / or substantially adjacent to the back side of either the upper or lower bearing shell,
The two lubrication grooves (22) or the row holes for lubrication are separated from each other by a portion where the largest load is applied on the bearing surface, and the portions are continuous bearing surfaces.
Cross head bearing.   The flow path (16, 18, 19, 20, 20 ', 21) has at least one circumferential groove (18) running from the bearing cap (6) into the bearing saddle (11). The crosshead bearing according to claim 1.   The crosshead bearing according to claim 2, wherein the radial holes (15) open into the circumferential grooves (18).   An upper bearing shell (10) having a split bearing surface is supported by the bearing cap (6);
  The radial hole (15) of the crosshead bearing (1) opens into a circumferential slit (16) in the upper bearing shell (10), the slit (16) at least partially surrounding the circumference. Crosshead bearing according to claim 2, wherein the crosshead bearing overlaps a directional groove (18).   On the back surface of the lower bearing shell (12) or the saddle (11), there are two oblique grooves (20 ') running in an oblique direction,
Each of the oblique grooves (20 ′) can connect the corresponding circumferential groove (18) to the central hole (23) and supply oil to the axial lubricating groove (22) or the lubricating row hole. The crosshead bearing according to claim 3 or 4 provided as follows.   The bearing cap (6) or the bearing saddle (11) has at least one channel (19), preferably an axial channel (19), the axial channel (19) Circumferential groove (18) that intersects with the direction groove (18) and runs in the bearing saddle (11) or on the back side of the lower bearing shell (12) and finally leads to the bearing cap (6). 20)
  The circumferential groove (20) opens to the axial lubrication groove (22) or at least two oil supply holes (21) communicating with the lubrication row hole, and supplies lubricating oil to the bearing of the crank pin. Intersecting the oiling hole (23) running through the connecting rod (7) as possible,
The crosshead bearing according to claim 3 or 4.   The channel (19) extends from the circumferential groove (18) running from the bearing cap (6) into the bearing saddle (11), into the bearing saddle (11) or of the lower bearing shell (12). Crosshead bearing according to claim 6, running to the rear side and running obliquely into a circumferential groove (20) which eventually leads to the bearing cap (6).