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Crosshead Bearing - Car Repair Manuals And Wiring Diagrams

Crosshead Bearing

Posted by Cynthia D. Alexander in Crosshead
Crosshead Bearing -
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Crosshead Bearing

Crosshead Bearing,
Crosshead Bearing,
The rams and crosshead are attached by sliding block arrangement known as a "Rapson slide.” The combined weight of the rudder and crosshead, about 35 tons, is supported by the manganese bronze carrier bearing shown in figure CrossheadBearing Failures The crossheadwas always the “Achilles'heel” of the large slowrunning twostroke engine. The gasforces loadonone side the lower bearingshell of the crosshead, while the massforces are smaller because complications involved not only in effective crosshead design in the large twostroke engine but also with 'small end' design in the fourstroke engine. Methods of improving top end bearing lubrication are as follows: 1. Reduction in the load on bear firmly

against.each other so that, owing to the elasticity of the bearing and the compression of the oil film on the side of the For a crosshead pin bearing oiled through the center of the pin the same system of oil grooves as shown in Fig. a twostroke crosshead reciprocating engine converts the reciprocating motion of the piston to a rotary motion in the crank shaft at the crosshead bearing. referring to figure 1.16 and considering the forces meeting at the crosshead bearing, When the largebore engine 850/1700 VGAU was designed in the very late 1950s the crosshead bearing problems were duly taken into consideration. First of all a moderate specific bearing load was desirable for which reason ample bearing Connecting Rod and Bottomend

Bearing.The connecting rod is an openhearth steel forging, drilled throughout to reduce weight and to provide passage for lubricating oil from the crankshaft to the crosshead and guide bearings. The topend Of the numerous components in a single acting twostroke engine the crosshead bearing is a particularly highly stressed element calling for very careful designing. The reasons for this are that the bearing is not only subjected to the pressure Piston rod Packing Crosshead guides . Crosshead shoes . Crosshead pin Crosshead bearing wedge and bolt . Crosshead bearing Leaking scat. Scored stem. Galled stem threads. Hardened packing Out of alignment with crosshead guides, Piston rod Packing Crosshead guides . Crosshead shoes .

Crosshead.pin . . Crosshead bearing wedge and bolt . Crosshead bearing Crank bearing, Wedge and bolt Shaft governor . Flyball governor Tail bearing . . . Main bearing . . Eccentrics 

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