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	Crosshead bearing - Wikipedia, the free encyclopedia
		On smaller engines the connecting rod links the piston and the crank directly, but this transmits transverse forces to the piston, since the crankpin (and thus the direction the force is applied) moves from side to side with the rotary motion of the crank.
		A piston rod is attached to the piston and links it to the crosshead, which is a large casting sliding in crosshead guides, allowing it only to move in the same direction as the piston travel.
		The piston rod is mounted on the underside of the piston and connected to the crosshead by a single nut.
	en.wikipedia.org /wiki/Crosshead_bearing (342 words)

	Crosshead bearing: Definition and Links by Encyclopedian.com - All about Crosshead bearing
		The crosshead is a large metal casting which slides up and down on a guide mounted on the crankcase of the engine.
		The crosshead is a transitional component from the reciprocating motion of the piston to the rotary motion of the connecting rod and the crankshaft.
		Another consideration with the crosshead engine is in the ease of maintenance when pistons have to be pulled from the cylinder.
	www.encyclopedian.com /cr/Crosshead-bearing.html (167 words)

	Connecting rod assembly with a crosshead - Patent 5247873
		The reciprocating motion of the crosshead is typically applied to a plunger and the plunger compresses fluid in the fluid end of the pump during the thrust portion of the pump cycle.
		Specifically, the wrist pin bearing between the connecting rod and the wrist pin becomes worn and deformed from the load transmitted during the thrust stroke of the pump when the plunger and crosshead are acting against high pressure fluid being pumped through the fluid end of the pump.
		A split retraction bearing ring is held between the rear portion of the sphere and a shoulder in the crosshead.
	www.freepatentsonline.com /5247873.html (2535 words)

	Multiple jackscrew rod to crosshead mounting - Patent 4338037
		A crosshead nut 4 which threadedly engages the threaded portion of the piston rod is then tightened against the crosshead to lock the piston rod to the crosshead.
		The bearing pad is secured within the counterbore by means of a groove circumferentially inscribed around the outer edge of the bearing pad and a resilient ring secured within the groove such that the outer edge of the ring is in contact with the inner wall of the counterbore.
		Crosshead nut 16 is provided with a centrally located threaded rod accepting through bore 19 which threadedly engages the threaded end 12 of piston rod 11 such that the inner face 17 of the crosshead nut is slightly spaced from mounting boss face 15, as best shown in FIG.
	www.freepatentsonline.com /4338037.html (2135 words)

	Fabricated reciprocating piston pump - Patent 4477237
		The pump includes crossheads which are of rectangular cross-sectional shape having flat parallel bearing surfaces and which are supported in the frame by elongated crosshead slide plates which may be adjusted laterally and vertically to align the crossheads with the axis of reciprocation of the pump piston rods.
		The bearing assemblies 114 are butted against opposed shoulders formed on the shaft portion 47 in accordance with conventional practice, and the shaft 44 is retained in assembly with the bearing assemblies 114 by opposed locknuts 116 threaded onto spaced apart threaded portions formed on the shaft 44 in a conventional manner.
		The crossheads 28 and 30 are identical in construction and are preferably formed of cast iron or steel and have a generally rectangular or square cross-sectional shape with opposed upper and lower bearing surfaces 157 and 158, respectively.
	freepatentsonline.com /4477237.html (8140 words)

	Crosshead bearing (Site not responding. Last check: 2007-10-08)
		A piston rod is attached to thepiston and links it to the crosshead, which is a large casting sliding in crosshead guides, allowing it onlyto move in the same direction as the piston travel.
		The crosshead is also connected to the rotating crank via the connecting rod.In this way, the transverse forces are applied only to the crosshead and its bearings, not to the piston itself.
		Crossheads in a steam locomotive can be mounted either to oneguide mounted above the crosshead or to two, one above and one below (called an alligator crosshead since it has two"jaws").
	www.therfcc.org /crosshead-bearing-189783.html (322 words)

	Crosshead bearing - Definition up Erdmond.Com (Site not responding. Last check: 2007-10-08)
		In the case of the steam_engine, a crosshead is essential if the engine is to be ''double acting'' - steam is applied to both sides of the cylinder, which requires a seal on both ends of the cylinder.
		A piston_rod is attached to the piston and links it to the crosshead, which is a large casting sliding in crosshead_guides, allowing it only to move in the same direction as the piston travel.
		Crossheads in a steam_locomotive can be mounted either to one guide mounted above the crosshead or to two, one above and one below (called an ''alligator crosshead'' since it has two "jaws").
	www.erdmond.com /Crosshead_bearing.html (345 words)

	Bearing provided with oblique oil grooves and/or with a plurality of obliquely arranged rows of semicircular ...
		On the other hand, when it is more than 50%, however, strong the bearing it is possible that it cannot avoid becoming weak in load bearing strength due to the excessive decrease in the load bearing surface area in spite of the improvement in non-seizure characteristics.
		In this enbodiment, however, a smaller-sized bearing with outside diameter of 110 mm and a bearing width of 40 mm was made for convenience in testing for which it was used.
		The result was that while the bearing of conventional forms failed early due to failures such as flowing, crushing, fatigue and seizure, the bearing having either the first aspect or the second aspect showed excellent non-seizure quality and endured a long period of use.
	www.freepatentsonline.com /4105267.html (2435 words)

	The Crosshead
		This means that hydrodynamic lubrication, where the pin is separated from the bearing by a wedge of oil only occurs over part of the swing; i.e when the relative speed between the two components is high enough.
		Because of the high loads the bearing material is a tin-aluminium alloy bonded to a steel shell.
		Oil is supplied to the crosshead using a swinging arm or a telescopic pipe and is sometimes boosted in pressure to aid efficient lubrication.
	www.marinediesels.info /2_stroke_engine_parts/crosshead.htm (422 words)

	Crosshead bearing -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08)
		These transverse forces are tolerable in a smaller engine; a larger engine's much greater forces would cause an intolerable degree of wear on the piston and (A surface generated by rotating a parallel line around a fixed line) cylinder, as well as increasing overall friction in the engine.
		Large (An internal-combustion engine that burns heavy oil) diesel engines (such as those fitted to ships) often are of this pattern; the vast majority of steam engines are also built this way.
		Crossheads in a (A locomotive powered by a steam engine) steam locomotive can be mounted either to one guide mounted above the crosshead or to two, one above and one below (called an alligator crosshead since it has two "jaws").
	www.absoluteastronomy.com /encyclopedia/c/cr/crosshead_bearing.htm (248 words)

	EM 327 MTS Machine (Site not responding. Last check: 2007-10-08)
		The upper crosshead can be positioned to accommodate a specific specimen by loosening the bolts, clamping it to the columns and using the hoist (20,000lbs.) machine) or the hydraulic lifts (55,000 lbs.
		The load cell or transducer and either a bearing surface (compression test) or a grip (tension test) is attached to the crosshead.
		A bearing surface or grip is also attached to the movable piston.
	www.aeem.iastate.edu /Courses/em327/WWW/equipment/mts.html (288 words)

	Read about Crosshead bearing at WorldVillage Encyclopedia. Research Crosshead bearing and learn about Crosshead bearing ... (Site not responding. Last check: 2007-10-08)
		steam engine, a crosshead is essential if the engine is to be double acting - steam is applied to both sides of the cylinder, which requires a seal on both ends of the cylinder.
		piston rod is attached to the piston and links it to the crosshead, which is a large casting sliding in
		crosshead guides, allowing it only to move in the same direction as the piston travel.
	encyclopedia.worldvillage.com /s/b/Crosshead_bearing (330 words)

	Crosshead
		The purpose of the crosshead is to translate reciprocating motion of the piston into the semi rotary motion of the con rod and so bearings are required.
		Crosshead pins are supported in bearings and the traditional way has been to mount the piston rod at the centre of the pin with a large nut and having two bearings alongside.
		In order to minimise the risk of bearing failure the actual force on the oil within the bearing should be kept within reasonable limits this can be achieved by having as large a bearing area as possible.
	www.marineengineering.org.uk /motconst/mcxheadmain.htm (783 words)

	Piston rod seal for a Stirling engine - Patent 4428584
		The invention in accordance with claim 2 wherein the hydrostatic bearing includes means capable of maintaining concentricity of the piston rod in said piston rod sealer during movement of the piston.
		This crosshead may then be coupled to a crankshaft which is to be rotationally displaced by the reciprocating movement of the piston.
		The present invention provides a piston rod seal which utilizes a hydrostatic bearing which serves to supply pressure to the oil side of the hydrogen-to-oil seal at a pressure level slightly less than the pressure of the hydrogen so that there is a very slight pressure drop across the seal.
	www.freepatentsonline.com /4428584.html (1894 words)

	MAN B&W - PRESS->PRESS RELEASES->MARINE POWER->TWO-STROKE->TWO-STROKE ARCHIVE 2003
		An important step is evaluating the contact pressure between the bearing shell and the bearing saddle, this pressure distribution being calculated during assembly when the main bearing caps are tightened.
		Crosshead bearings show a significantly different load pattern when operating in the full speed-idle load mode.
		Elasto-hydrodynamic bearing analyses are always conducted at the design stage of new or re-designed (uprated) engine types, and the full speed-idle load mode is always taken into consideration.
	www.manbw.com /article_002619.html (765 words)

	Steering Gear
		The crosshead is free to slide along the circular arm of the tiller so that the straight line effort of the rams is applied to the angular moving tiller.
		Should the bottom of the tiller and the crosshead bearing touch, then the weight of the rudder will be transferred from the rudder bearing to the steering rams with disastrous results such as leaking of working fluid from the cylinders and shearing of the rams.
		On some ships it has been discovered that the ball bearing races on the stand-by pump have been failing due to brinelling of the ball bearings, caused by ship vibrations, and in these cases it is usual to fit devices which allows the stand by pump to be motored slowly.
	www.marineengineering.org.uk /navarch/navsteermain.htm (2829 words)

	Tern Technologies :: Rotating Equipment Consultants
		The alignment between main bearing saddles, crosshead guides to cylinder bore and the perpendicular relationship between the main bearing centerline and crosshead centerline can be easily verified using optical measurement techniques.
		One ligne of sight is established through the bearing saddle targets, while the cross scope views the targets located in the crosshead guide.
		The deviation recorded on the crosshead guide targets is a direct measurement of the perpendicular relationship between the two centerlines.
	www.terntech.com /services/alignment/engs-comps.html (526 words)

	The Connecting Rod
		Made from drop forged steel, on the older engines the bottom of the con rod terminates in a flange known as a Marine Palm which is bolted to the split bottom end (Crankpin) bearing, whilst at the top another flange is formed on which is bolted the two crosshead bearings.
		Modern bearings are of the "thinwall" type, where a thin layer of white metal or a tin aluminium alloy is bonded to a steel shell backing.
		When inspecting the crankpin bearing and journal it is good practise to check the journal for ovality because if this is excessive, a failure in the hydrodynamic lubrication can occur.
	www.marinediesels.info /2_stroke_engine_parts/con_rod.htm (258 words)

	SensIT AS - Cost-saving innovations for maritime environments (Site not responding. Last check: 2007-10-08)
		These bearings can experience rapid temperature changes during damage development, thus the sensors are designed to give immediate response to the alarm and monitoring system.
		According to the classification societies, the explosive conditions in the crankcase must be monitored by measuring the temperature of all bearings, or by applying oil mist measurement.
		If the crank bearing and crosshead bearing on crosshead engines are monitored by the SENTRY system, and the main bearing by conventional temperature sensors, the oil mist measuring system can be omitted.
	www.sensit.no /w_sensors.html (514 words)

	measuring the main bearing clearances on a large two stroke marine diesel engine
		Main bearing clearances on a 2 stroke crosshead engine are measured using a set of retractable feelers sometimes referred to as "Swedish feelers"
		The clearance is measured at the top of the bearing, and to obtain access, the engine is first turned so that the crankwebs are horizontal.
		The clearance on these bearings is non adjustable and the bearing is changed when the clearance has reached a maximum.
	www.marinediesels.info /repairs/main_bearing_clearance.htm (245 words)

	Crosshead bearing - Encyclopedia Glossary Meaning Explanation Crosshead bearing (Site not responding. Last check: 2007-10-08)
		Crosshead bearing - Encyclopedia Glossary Meaning Explanation Crosshead bearing.
		Here you will find more informations about Crosshead bearing.
		The orginal Crosshead bearing article can be editet
	www.encyclopedia-glossary.com /en/Crosshead-bearing.html (392 words)

	Ray F. HasBrouck, Enginges without Castings (Site not responding. Last check: 2007-10-08)
		Ball and needle bearings are used on all rotating shafts.
		The crosshead bearing is a needle bearing and it is provided with an internal passage so that it can be lubricated using a small Grease Gun designed for lubricating the nose sprocket on chain saw blades.
		The Feedwater pump-is driven from the crosshead and is a.250 inch Dia.
	hasbrouck.8m.com /eng10.htm (307 words)

	Crosshead bearing - Encyclopedia, History, Geography and Biography
		Crosshead bearing - Encyclopedia, History, Geography and Biography
		This page was last modified 01:30, 8 Jun 2005.
		This encyclopedia, history, geography and biography article about Crosshead bearing contains research on
	www.arikah.com /encyclopedia/Crosshead_bearing (362 words)

	Steam engine
		Power is removed by a sliding rod, sealed against the escape of steam.
		This rod in turn drives (via a sliding crosshead bearing) a connecting rod connected to a crank to convert the reciprocating motion to rotary motion.
		An additional crank or eccentric is used to drive the valve gear, usually through a reversing mechanism to allow reversal of the rotary motion.
	pedia.newsfilter.co.uk /wikipedia/s/st/steam_engine.html (1134 words)

	Croshead - Mounted in the croshead of the ELF 3400 load frame, the EM actuator has a 300 mm displacement and integral ... (Site not responding. Last check: 2007-10-08)
		70 TBN crosshead engine cylinder oil cylinder lubricant designed for the latest generation of crosshead engines operating up to 160 bar in maximum cylinder.
		Yellow Jacket "Crosshead Style" Extruders 1/4" to 6" Wayne Yellow Jacket "Crosshead Style" Extruders are ideal for: Fine Wire Insulation.
		Crankshaft Deflections The crosshead pin sits in the crosshead bearing which is either a forked type (shown left), where the bearing housings.
	www.destarter.com /crosshead/croshead.html (437 words)

	SHINA METALTECH CO.,LTD.:
		?Located at the rear of the engine, this bearing ensures the smooth operation of the engine, withstanding the force of seawater in the direction of the axis.
		?This sliding bearing, surrounding the crosshead, ensures stable up-down movement of the piston rod.
		?This bearing supports the vertical weight of the crank pin and smoothly converts the angle movement into the rotating movement of the crank shaft.
	www.shinametal.com /viewgroup_e.html (139 words)

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