Crosshead engine

Abstract

The invention relates to a crosshead engine, which comprises at least one piston (1) via one piston rod (2) connected to one crosshead axial neck (4), while said piston via one channel system betweenthe crosshead axial neck (4) and the piston rod (2) supplies cooling liquid, wherein said piston rod (2) has one through hole (12) and one positioning sleeve (16) extending out from the radial hole (14) concentric with said crosshead axial neck (4) is embed into the end area of lower part of through hole; the part of said through hole via one inert tube (13) embedded into the through hole with small diameter forms one internal flowing channel and one external flowing channel (10, 11) connected to the flowing channel of crosshead axial neck, used in cooling liquid, to realize simple productionand improve carrying ability; the upper part of through hole (12) of piston rod (2) is designed as the through hole without step; the inert tube (13) and the lower part are embedded into the positioning sleeve (16) whose outer diameter is large than the outer diameter of insert tube; and the outer diameter is equal with the through hole.

Description

technical field [0001] The invention relates to a crosshead engine, especially a large two-stroke diesel engine, which has at least one piston connected to a crosshead journal through a piston rod, and the piston is connected to a crosshead journal through a A cooling fluid is supplied by a channel system in which the piston rod is provided with a through hole, and a centering sleeve protruding from a radial hole concentric with the crosshead journal is fitted into the lower end of the through hole. area, while the area of ​​the through-hole located above this is divided into flow channels on the side of a crosshead journal via a cannula whose lower end is embedded and has a smaller outer diameter compared to the diameter of the through-hole. There is an inner flow channel and an outer flow channel that are connected to the coolant. Background technique [0002] A known arrangement of such engines is in the form of notches from Figure 6 can be clearly seen in . The throug...

AI Technical Summary

Problems solved by technology

This makes it more difficult to manufacture

Another disadvantage is that the bore leading away from the lower end of the outer flow channel extends relatively far into the lower region of the piston rod through the flange height of the piston rod

In operation, as shown in experiments, this leads to poor stress distribution and consequently known arrangements with a shorter service life or with larger dimensions in the outermost

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