Application of strain gauge method for investigating. In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub. 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. The technology enables fast and accurate measurement of the bending line, allowing the detection of any vertical or horizontal misalignment. Balancing a propeller prevents motor andor airframe damage. Use this simple and effective procedure for shaft alignment of your rotating equipment. 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. Current issues for shaft alignment and research motivation. Shafting alignment procedure considers static and pseudo. Nov 08, 2017 propeller line in service condition to be within specified.
A swedish and dutch invention aims to eliminate misalignment, modernizing todays shaft alignment practice. Flexi discs must be installed correctly with the engine forward torque being transferred through the thicker sections of the flex discs. 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. There are several steps which need to be taken for a successful alignment job. We welcome your messages about all aspects of maritime. Standard procedure propeller shaft angle you can use a socket and angle gauge in place of the inclinometer 1 place transmission in neutral. Maritimeexpert website maritime experts information. Alignment between propeller shaft and gearbox alignment of bearing journals in relation to stern tube. Aim to have all soft foot readings within 2 mils thou. 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. 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. It can even check the gearbox shafts axis of rotation alignment to its bearings, saving loads of time versus a tight wire.
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. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. Icondriven large lcd colour touch screen interface. Marine engineering study materials and resources wrote a new note. 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. The result is excessive stress and the propeller may fail. For this procedure, precalculation is used to find the gap and sag that should exist between couplings, when shaft alignment is correct. There were no factory alignment marks on the rear propeller shaft on my w220 2003 update s500l. Design and optimization of automobile propeller shaft with. Nov 04, 2010 many consider runninggear alignment to be a black art.
A misalignment of these three components as small as 0. Clean, dress up and file any burrs from mounting faces and anchor bolt holes. Replace damaged shim packs with new, corrosion and. To provide an overview of alignment, the discus sion in this. Measurement system for alignment of extrusion machines. 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.
Used in combination with a jackup system, it allows the engineer. 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. Clean the shaft and remove any marks using a file or emery cloth then remove the bearings using a bearing puller. Modelling of propulsion shaft line and basic procedure of shafting alignment calculation article pdf available in brodogradnja 593. Drive shaft and propeller system engine alignment pss shaft seal propellers propeller removal propeller installation propeller shaft. Running gear alignment professional boatbuilder magazine.
To align the coupling, move the propeller shaft, with attached coupling flange, toward. Understanding the need for offset shaft alignment vibralign. 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. The tubular design makes the drive shaft strong and light.
Carefully use sandpaper to remove a small amount of plastic from the entire front of the heavier propeller blade in the darkercolored areas. The ins and outs of shaft alignment part ii zf marine propulsion. Heater controller inspect controller and clean probe ends quarterly 8. Chapter 11 drive lines, differentials, drive axles, and. Regarding the shaft alignment design and implementation efforts by the shipbuilding industry. Ive drawn a cross on each yoke so you can see clearly that they are indeed in alignment. Pdf modelling of propulsion shaft line and basic procedure. 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. Standard operating procedure for atc orion series sputtering coating system rfdc 1. Where the propeller shaft length is such that it cannot be simply supported by the gearbox coupling and p. Virtually everything we consume or use has been touched or produced in some manner by rotating gear. In b, lining the engine up with an outoftrue shaft or coupling will result in shaft whip and noticeable vibration.
My back shaft is easy to photograph and it conforms to what the magazine refers to as having the yokes in the same plane. 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. 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. Produce pdf reports directly from the display unit and. 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. Disasseinble propeller shaft joint using follow ing procedure. Jun 08, 2011 this centers the shaft in the shaft log and gets rid of the wiggle, assuming your cutless bearing was recently replaced. If you need to print pages from this book, we recommend downloading it as a pdf. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in. 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. When its centered, the shaft droop will have been eliminated. Fixture mounting procedures are obviously dependent on the specific type of hardware being used. It is a little bit more complicated than usual as each shaft has four supporting points. Jan 22, 2014 offset shaft alignments require specific shaft alignment equipment.
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. We are especially happy to help you if you have requests for maritime industry shipbuilding and repair. Such balancing is employed to compensate for the vibrational effects of the tolerances of the drive components. Fortunately, resolving these alignment issues has gone hightech, too. In a, the alignment is correctable by rotating and shifting the engine, bringing the difference measured across the coupling faces to zero.
Clean, file and dress up any burr from the mounting faces and bolts holes. The fixtures should include an assortment of rods to span various coupling lengths. Measuring propeller drop with the help of poker gauge. Measurements 1 procedures for measuring bearing journals 2 determining out of round of journals 3 after dimensional inspection xray. A guide to shaft alignment achieving a satisfactory shaft alignment is paramount for the safe and reliable operation of a ship during its lifetime. Visually check coupling, pipehangers, base bolts, coupling spacing etc. This alignment technique uses a laser mounted in the region of the propeller and projects a laser reference beam forward. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in operation. Pdf dynamic balancing and shaft alignment researchgate. Reinove the propeller shaft froin the truck by taking out four capscrews at each end holding the flange type bearings to the fitting yokes, being careful not to let the flanged bearings fall off and perinit foreign inatter to enter the rollers.
Mount the new bearings on a section of the shaft that is not worn by. For proper alignment, the bubble should be in the same position as measured on each shaft. Slide drive shaft forward to clear differential and lower drive shaft. As the shaft and coupling are true, vibrations will be minimized. Laser alignment is an essential component of a viable maintenance. Where fine alignment is not necessary, for example when a flexibly jointed drive shaft is used, the. Align reference marks on drive shaft to transmission and differential. Welcome to maritimeexpert website sharing platform for all maritime professionals. Perkins sabre marine engines installation manual m300ti 6 cylinder turbocharged, intercooled, diesel engine for. Shaft alignment methods explained bright hub engineering. 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. Experimental and numerical investigation of the unsteady. There can be varying degrees of damage to an engine and propeller from a propeller strike. After removing the cardan shaft the special offset fixture mounts across the coupling flange of the driven machine.
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. Alignment is satisfactory when the trans mission output flange and propeller shaft coupling flange with pilot seated are within inch. Shaft alignment handbook third edition by john piotrowski pdf. An essential component of any successful alignment procedure is the determination and. 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. The position of the bearing in vertical direction is commonly described by means of vertical offset from a straight. Place reference mark at differential drive shaft flange to assist installation. A variety of shaft alignment fixtures are available for performing rimface alignment. Main propulsion shaft alignment assessments using strain. The maintenance files may also provide names of sources for parts and materials. Shaft runout is often abbreviated tir total indicated runout, a measurement of how much a shaft wobbles with each revolution. Here the laser has been positioned in the aftmost shaft bearing, and aimed at the transmission output coupling. Sighting through as part of shaft alignment procedure eliza jaryszkami ska west pomeranian university of technology, szczecin, institute of manufacturing engineering, al. The ins and outs of engine and shaft alignment part i.
The wobbling motion produced by a shaft that is not perfectly true and straight. The proper shaft alignment procedure is to secure the. The drive shaft, also called a propeller shaft, is commonly a hollow steel tube with yokes welded on the end. This video is intended to guide a user through the shaft alignment process for a typical mid engine, direct drive tournament ski boat. Engines, gearboxes and propeller shafts on ships are aligned. If alignment is unsatisfactory, an adjust ment is required see paragraph 24.
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. Please contact your local easylaser distributor for assistance. Bearing clearance and slope verification procedure. The goal is to minimize any coupling strain, and ensure that the machine is alignable. In the case of total replacement, the gearbox is shipped to one of brad. Recommended corrective action for propeller strikes damage to a propeller is serious and can cause the engine to be unairworthy. Pdf modelling of propulsion shaft line and basic procedure of. Alignment marks must be added prior to removing and separating front and rear shafts.
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. It can also be used to set up boring bar bearings for line boring equipment. Unbolt the bearings and remove the shaft and pillow blocks as one unit. Propulsion shaft alignment method and analysis for surface. As a further benefit, thrusterthruster interaction losses are controlled, enhancing overall vessel dynamic positioning capability. 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 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. Measurement table view select which position to measure.
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. Dynaligner s developer said the propeller shafting is. Selection and use of a commercial package designed to accommodate a variety of shaft diameters is recommended. Primarily for propeller shaft installations on ships with stern tubes, support bearings, gearboxes and engines. Offdesign propeller performance is also predicted to aid in mod. The alignment procedure is the executable part of the process which is performed in accordance with the requirements defined by alignment designer. Veedrive ski boats require additional steps and instruction. 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.
Unfortunately, this book cant be printed from the openbook. 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. The following procedure applies to propellers of all materials e. It includes terminology used and methods of balancing practiced by the industry. A practical guide to shaft alignment plant services. Sabres commissioning procedure, a copy of which has been included in this manual. The propeller shaft in the after peak tank is provided with inboard and outboard seals. W220 s500l drive tail propeller shaft refurbishment. 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. 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. For instance, if the inner diameter of the shaft log is 1. The procedure for doing reverse dial indicator alignment is not a difficult one. If the alignment is correct, the gap will gradually close completely as the.
Engine and propeller shaft alignment are among the most critical aspects of. E950 bore alignment, laser alignment tool easylaser. If the propeller blade falls out of horizontal alignment. The bent shaft affects alignment process by showing improper reading. If propeller shaft is suspected of being unbalanced, it can be verified with the following procedure. The fixturlaser xa is capable of doing this type of alignment using a special bracket set and alignment program. Another application can be hydraulic pipes for example. Mar 17, 2014 i have to align the propeller shafts on this boat. This cuts the length of each shaft to avoid drive line vibration. When alignment is satisfactory, tighten at taching hardware. Output as pdf file has been powered by universal post manager plugin from.
Align the propellers blade horizontally along the balancer shaft. Propeller shaft alignment forward alignment approach. 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. Gearbox maintenance tips rapid repair solutions once the problem is identified, the cost of repair and downtime must be weighed when deciding whether to fix the problem onsite or have the gearbox completely replaced. The instructions below describe sanding or adding material to a propeller in order to achieve proper balance. 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. It is imperative that the checklist, as well as the warranty registration.
The objective of optimized shaft alignment is to increase the operating life span of rotating machinery. Document resume ce 001 424 overhaul, inspection and. Now, to my astonishment my front drive shaft is set up exactly the opposite. 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. Removal 1 disconnect the ground cable from the battery. All types of machines having shafts as an integral part of their structure, experience problems related to shaft alignment. Circumstances of a propeller strike cannot always be used as predictors for the extent of engine damage or its future reliability. 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.
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