The instructions below describe sanding or adding material to a propeller in order to achieve proper balance. Alignment marks must be added prior to removing and separating front and rear shafts. For this procedure, precalculation is used to find the gap and sag that should exist between couplings, when shaft alignment is correct. It can even check the gearbox shafts axis of rotation alignment to its bearings, saving loads of time versus a tight wire.
In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in. Measurement table view select which position to measure. Herein, we explore the redesign of a propeller for a higher shaft rotation rate, in order to investigate the impacts on motor sizing within the limits of cavitation. Engine and propeller shaft alignment are among the most critical aspects of. If propeller shaft is suspected of being unbalanced, it can be verified with the following procedure. Propeller shaft type flange spline spline spline spline spline spline spline sump type wet dry wet dry wet dry wet dry weight of engine ibs. The following procedure applies to propellers of all materials e. Regarding the shaft alignment design and implementation efforts by the shipbuilding industry. Another application can be hydraulic pipes for example. Selection and use of a commercial package designed to accommodate a variety of shaft diameters is recommended. A properly maintained propeller is designed to perform normally under these loads, but when propeller components are damaged by corrosion, stone nicks, ground strikes, etc. Clean, dress up and file any burrs from mounting faces and anchor bolt holes. Propeller shaft alignment forward alignment approach. Unfortunately, this book cant be printed from the openbook.
This laser reference beam passes through the strut tube or cutlass bearing, the stern tube, support bearings, if any, and to the engine or reduction gearbox. The wobbling motion produced by a shaft that is not perfectly true and straight. Running gear alignment professional boatbuilder magazine. The proper shaft alignment procedure is to secure the. A variety of shaft alignment fixtures are available for performing rimface alignment. Document resume ce 001 424 overhaul, inspection and. Jun 08, 2011 this centers the shaft in the shaft log and gets rid of the wiggle, assuming your cutless bearing was recently replaced. Maritimeexpert website maritime experts information. If the alignment is correct, the gap will gradually close completely as the.
By tilting the propeller axis downward slightly, severe thrust reductions caused by the propulsion stream contacting the hull coanda effect can be greatly reduced. The fixturlaser xa system is a powerful, easy to use laser guided prop shaft alignment system for checking and correcting alignment in propeller or any driven rotating shaft. Sabres commissioning procedure, a copy of which has been included in this manual. This cuts the length of each shaft to avoid drive line vibration. For instance, if the inner diameter of the shaft log is 1. A guide to shaft alignment achieving a satisfactory shaft alignment is paramount for the safe and reliable operation of a ship during its lifetime. The purpose of this document is to provide fundamental information and to guide the industry on balance and vibration technology as applied to impellers used in air moving systems. We welcome your messages about all aspects of maritime. For this training, you will perform the alignment with the shafts uncoupled and the indicators mounted in direct contact with the rim and face of the movable shafts coupling. The fixtures should include an assortment of rods to span various coupling lengths. Here the laser has been positioned in the aftmost shaft bearing, and aimed at the transmission output coupling.
Recommended corrective action for propeller strikes damage to a propeller is serious and can cause the engine to be unairworthy. There can be varying degrees of damage to an engine and propeller from a propeller strike. Current issues for shaft alignment and research motivation. A practical guide to shaft alignment plant services. Shaft runout is often abbreviated tir total indicated runout, a measurement of how much a shaft wobbles with each revolution. Align reference marks on drive shaft to transmission and differential.
Use this simple and effective procedure for shaft alignment of your rotating equipment. Shaft alignment is the configuration of the shafts and bearings relative to the centerlines of the bearings from the theoretical straight line condition, so as to achieve an acceptable bearing load. Alignment between propeller shaft and gearbox alignment of bearing journals in relation to stern tube. Offdesign propeller performance is also predicted to aid in mod. The dynaligner is said to offer trouble free operation of marine propulsion trains, irrespective of ship operation condition or hull deflections. Shafting alignment procedure considers static and pseudo. This alignment technique uses a laser mounted in the region of the propeller and projects a laser reference beam forward. Measurement system for alignment of extrusion machines. Shaft alignment challenges the single sterntube bearing. It includes terminology used and methods of balancing practiced by the industry. Experimental and numerical investigation of the unsteady. If you need to print pages from this book, we recommend downloading it as a pdf. Circumstances of a propeller strike cannot always be used as predictors for the extent of engine damage or its future reliability.
As the shaft and coupling are true, vibrations will be minimized. Shaft alignment has in recent years become more of a challenge due to increased power, lower shaft speeds and heavier propellers in combination with a shorter propulsion shaft. Jan 22, 2014 offset shaft alignments require specific shaft alignment equipment. Engines, gearboxes and propeller shafts on ships are aligned. These seals contain nitrile rubber or viton lip seal which seals against the bronze liner shrunk fit around the cast iron propeller shaft. Aim to have all soft foot readings within 2 mils thou. Removal 1 disconnect the ground cable from the battery. Drive shaft and propeller system engine alignment pss shaft seal propellers propeller removal propeller installation propeller shaft. The ins and outs of shaft alignment part ii zf marine propulsion.
Measurements 1 procedures for measuring bearing journals 2 determining out of round of journals 3 after dimensional inspection xray. Sighting through as part of shaft alignment procedure eliza jaryszkami ska west pomeranian university of technology, szczecin, institute of manufacturing engineering, al. Service bulletin propeller gearbox alignment procedure description the alignment of your engine, engine mounting plate, and propeller gearbox is critical for a smooth running and long lasting gearbox. Unbolt the bearings and remove the shaft and pillow blocks as one unit. Gear operation and parts for paragon models p200p30op400 hydraulic transmissions table of contents page i specifications 78 description chan 78 model and serial numbers 78 ii introduction 79 iij installation 79 definition of rotation 79 installation of transmission to engine 79 propeller shaft alignment 79 iv operation 80 transmission oil. E950 bore alignment, laser alignment tool easylaser. Place reference mark at differential drive shaft flange to assist installation. Pdf modelling of propulsion shaft line and basic procedure. In this procedure, it is assumed that the tapers of both the shaft and propeller are made to the same specifications and with a taper of 34 on diameter per foot. Flexi discs must be installed correctly with the engine forward torque being transferred through the thicker sections of the flex discs. In b, lining the engine up with an outoftrue shaft or coupling will result in shaft whip and noticeable vibration. Visually check coupling, pipehangers, base bolts, coupling spacing etc. Perkins sabre marine engines installation manual m300ti 6 cylinder turbocharged, intercooled, diesel engine for. Alignment is satisfactory when the trans mission output flange and propeller shaft coupling flange with pilot seated are within inch.
Fortunately, resolving these alignment issues has gone hightech, too. If alignment is unsatisfactory, an adjust ment is required see paragraph 24. The alignment procedure is the executable part of the process which is performed in accordance with the requirements defined by alignment designer. Bearing clearance and slope verification procedure. The ins and outs of engine and shaft alignment part i. Standard operating procedure for atc orion series sputtering coating system rfdc 1.
An essential component of any successful alignment procedure is the determination and. It is a little bit more complicated than usual as each shaft has four supporting points. There were no factory alignment marks on the rear propeller shaft on my w220 2003 update s500l. The natural deformation of shaft sections is taken into account with rational alignment programmes and coupling conditions can be used to position shaft sections and to check alignment. Balancing a propeller prevents motor andor airframe damage. It can also be used to set up boring bar bearings for line boring equipment. Acceptable shaft alignment implies an arrangement of bearings, with specified positions in vertical direction, provides a satisfactory distribution of bearing loads, under all working conditions. When alignment is satisfactory, tighten at taching hardware. In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub. My back shaft is easy to photograph and it conforms to what the magazine refers to as having the yokes in the same plane.
Produce pdf reports directly from the display unit and. Slide drive shaft forward to clear differential and lower drive shaft. Ive drawn a cross on each yoke so you can see clearly that they are indeed in alignment. Number what is shaft alignment 6 a definition 6 machine catenary 7 operation above critical speed 8 expressing alignment 10 alignment parameters 10 angularity, gap and offset 11 short flexible couplings 14 spacer shafts 15 how precise should alignment be. The position of the bearing in vertical direction is commonly described by means of vertical offset from a straight. Pdf dynamic balancing and shaft alignment researchgate. Dynaligner s developer said the propeller shafting is. In a, the alignment is correctable by rotating and shifting the engine, bringing the difference measured across the coupling faces to zero. Sep 15, 2009 the shaft log is the tube that allows the shaft to penetrate the hull, with the stuffing box or shaft seal at one end, and typically a bronze and rubber shaft bearing within. Used in combination with a jackup system, it allows the engineer. Align the propellers blade horizontally along the balancer shaft. When its centered, the shaft droop will have been eliminated. If the propeller blade falls out of horizontal alignment. Primarily for propeller shaft installations on ships with stern tubes, support bearings, gearboxes and engines.
Chapter 11 drive lines, differentials, drive axles, and. Measuring propeller drop with the help of poker gauge. The result is excessive stress and the propeller may fail. Mar 17, 2014 i have to align the propeller shafts on this boat. Compulsory inclusion of propeller loads to be taken into account in the analysis. Regarding the modern calculation of the shaft alignment, the members of the shafting system such as propeller shaft, intermediate shafts and engine crankshaft are divided into n elements thereby the. Please contact your local easylaser distributor for assistance. The ins and outs of engine and shaft alignment part i from the. A misalignment of these three components as small as 0. A swedish and dutch invention aims to eliminate misalignment, modernizing todays shaft alignment practice. Fixture mounting procedures are obviously dependent on the specific type of hardware being used. Virtually everything we consume or use has been touched or produced in some manner by rotating gear.
Such balancing is employed to compensate for the vibrational effects of the tolerances of the drive components. The next is sized small enough to pass through your bearing with room to spare, and is long enough to allow the first shaft to engage the coupler 12 inch before the larger shaft, sized to exactly fit the gimbal bearing contacts the bearing. Disasseinble propeller shaft joint using follow ing procedure. Now, to my astonishment my front drive shaft is set up exactly the opposite. The procedure for doing reverse dial indicator alignment is not a difficult one. In the case of total replacement, the gearbox is shipped to one of brad. This workshop service repair manual pdf download for the iveco stralis atad mechanical electricelectronic has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Com is a knowledge management km consulting based maritime service provider being established among experienced and skilled professionals in the naval, maritime and offshorerelated services for more than 50years, having a vision and. Application of strain gauge method for investigating. Clean, file and dress up any burr from the mounting faces and bolts holes. Shaft alignment handbook third edition by john piotrowski pdf, lots of the substance amenities taken for granted in the modern society are made possible by the many rotating machinery systems found in each area of the planet. Where fine alignment is not necessary, for example when a flexibly jointed drive shaft is used, the.
The tubular design makes the drive shaft strong and light. Clean the shaft and remove any marks using a file or emery cloth then remove the bearings using a bearing puller. The fixturlaser xa is capable of doing this type of alignment using a special bracket set and alignment program. Shaft alignment is a method or procedure by which shafts of machines such as motors and turbines are connected to a generator or pump in proper alignment. Laser alignment is an essential component of a viable maintenance. Pdf modelling of propulsion shaft line and basic procedure of. The drive shaft, also called a propeller shaft, is commonly a hollow steel tube with yokes welded on the end. Main propulsion shaft alignment assessments using strain. The goal is to minimize any coupling strain, and ensure that the machine is alignable. While engine alignment is well understood by most marine industry professionals, shaft alignment is far more esoteric and well understood by far fewer folks in. All types of machines having shafts as an integral part of their structure, experience problems related to shaft alignment.
Modelling of propulsion shaft line and basic procedure of shafting alignment calculation article pdf available in brodogradnja 593. Heater controller inspect controller and clean probe ends quarterly 8. The objective of optimized shaft alignment is to increase the operating life span of rotating machinery. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. Design and optimization of automobile propeller shaft with. W220 s500l drive tail propeller shaft refurbishment. The propeller shaft in the after peak tank is provided with inboard and outboard seals.
Shaft alignment handbook third edition by john piotrowski pdf. Replace damaged shim packs with new, corrosion and. Lloyds register emeas technical investigations provides a comprehensive range of measurement and advisory services to help owners, operators and yards to help to ensure that the best. Carefully use sandpaper to remove a small amount of plastic from the entire front of the heavier propeller blade in the darkercolored areas. As a further benefit, thrusterthruster interaction losses are controlled, enhancing overall vessel dynamic positioning capability. We are especially happy to help you if you have requests for maritime industry shipbuilding and repair. For proper alignment, the bubble should be in the same position as measured on each shaft.
Marine engineering study materials and resources wrote a new note. Ever property investment in malaysia pdf since i installed quicken 2015 home and business propeller shaft alignment procedure pdf upgraded from 2014 earlier in december, when i try to print my invoices to a pdf file. After removing the cardan shaft the special offset fixture mounts across the coupling flange of the driven machine. To align the coupling, move the propeller shaft, with attached coupling flange, toward. Veedrive ski boats require additional steps and instruction. Mount the new bearings on a section of the shaft that is not worn by.
Standard procedure propeller shaft angle you can use a socket and angle gauge in place of the inclinometer 1 place transmission in neutral. Icondriven large lcd colour touch screen interface. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in operation. Nov 04, 2010 many consider runninggear alignment to be a black art. It is imperative that the checklist, as well as the warranty registration. Shaft is realigned confirmation of straightness and issuing final report the propulsion shafting alignment process consists of design, analysis and the alignment procedure and measurements. Alignment must be checked before the delivery of the vessel to the customer considering that 1 the hull and the propeller shaft alignment must be completed with the vessel in the water, because hull deformations can change previous alignment. Understanding the need for offset shaft alignment vibralign. Shaft alignment methods explained bright hub engineering. This video is intended to guide a user through the shaft alignment process for a typical mid engine, direct drive tournament ski boat. Spicer life series quick disconnect end yokes reduce the time to remove or install the driveshaft, equating up to a 75% labor savings for service. There are two bushins outside the hull as you can see in the picture, the shaft gland, a ball bearing and another thrust bearing before the aquadrive system.
There are several steps which need to be taken for a successful alignment job. The alignment of shaft with the bearing and housing, which is a manufacturing tolerance stackup of the bearing parts and the housing bores and faces. Welcome to maritimeexpert website sharing platform for all maritime professionals. At a yard i once managed, i clearly recall watching a contractor, who specialized in this work, take a decidedly seatofthepants approach to calculating shaft weight and the associated sag or droop. Nov 08, 2017 propeller line in service condition to be within specified.
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