| 摘要 |
<p>A two-stroke internal combustion engine (1) of the crosshead type comprises a bedplate (7) with main bearings (8) for the crankshaft, an A-shaped frame box (2) mounted on the bedplate and having transverse stiffeners (9) supporting guide planes (13) for the crosshead, and a cylinder section (3) clamped together with the bedplate by means of stay bolts (16). The transverse stiffening of the A-frame is composed of a single-layer plate wall (9) which on either side carries two opposite guide planes (13) which on the rear side are supported by a vertically extending stiffening (14) welded together with the plate wall which then forms a hollow profile (15) in unison with the guide and the stiffening. A stay bolt (16) extends downwards through each hollow profile to a lower stay bolt end (17) fixed in the bed plate in an aera positioned on a level above the main bearings (8). The stiffening (14) extends completely down to the bottom of the A-frame. The transverse stiffening of the A-frame is composed of a few elements all of which may be assembled by means of external weld seams, and said stiffening further possesses a large transverse stiffness and assumes a minimum of space in the longitudinal direction of the engine.</p> |
