Tmea2skf laser shaft alignment alignment performed by. For maintenance personnel in drinking water and wastewater. Thanks to flexible brackets you can mount the equipment in the most appropriate place. Special brackets are available for alignment with locked rotors to increases the safety of the operator. Ensure you divide the rim dial tir by 2 to obtain an offset value. This interactive training unit is designed to familiarize trainees with the basic principles associated with measuring and correcting shaft misalignment using the rim and face method. After completing this course, participants should be able to describe the basic types of misalignment, describe general preparations for a rim and face shaft alignment procedure, and explain how to use the rim and face shaft. It is a major cause of repeatability problems with shaft alignment measurements, whether using dial indicators or a laser alignment system. For example, the only correct way to express shaftalignment tolerances is in terms of alignment conditions at the coupling, and we will describe several ways to do this. Grc phase 3 focused on identifying any abnormal loading on the gear, shaft. We suggest the following one day classroom alignment training class on rotating equipment alignment practice.
If, on the other hand, you update your knowledge of shaftalignment techniques and acceptable alignment tolerances, you might be on the way to becoming more reliabilityfocused. Plot the second offset point using the shaft slope face tir a dimension. Nov 19, 2015 as found shaft alignment results figure 1. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or reference to the manufacturers of the machinery. Hello all, i have tried to show an ongoing face and ring alignment for pumpmotor coupling. A practical guide to shaft alignment plant services. Those who purchase new alignment instruments and hand them out to field technicians who lack the knowledge of alignment fundamentals are often. The fixtures should include an assortment of rods to span various coupling lengths. If, on the other hand, you update your knowledge of shaft alignment techniques and acceptable alignment tolerances, you might be on the way to becoming more reliabilityfocused. Trains where one shaft cant be rotated during the alignment process. Selection and use of a commercial package designed to accommodate a variety of shaft diameters is recommended. One of the primary challenges of all methods used for shaft alignment on rotating machinery is obtaining valid measurement data.
It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. Ntt recommends a class of no more than 12 participants for the best results. Engines, gearboxes and propeller shafts on ships are aligned using easylaser system. Jul 26, 2014 alignment procedure taking alignment readings step no. The abs guide for enhanced shaft alignment calls for the optimal shaft alignment to be determined, along with expanded compulsory calculations such as whirling analyses and compulsory shaft alignment checks, in more conditions during sea trials. For both of these methods, it is recommended that for each set of measurement data, two steps be performed. Vibralign is committed to helping businesses use their resources more efficiently and effectively. Shaft alignment handbook 3rd edition the 3rd edition of the shaft alignment handbook is the most comprehensive book ever written on the subject of aligning rotating machinery. Plot this point counting from the dir offset point.
Sheng, ndition of the shaft alignment is crucial in order to make intelligent. In pursuit of that goal, vibralign invented its own method of correcting misalignment called vertizontal which allows for the vertical and horizontal adjustments to be made together in one pass, saving valuable time and ensuring accuracy the first time around. Rim and face alignment formula method tamil rotating. These packages expedite the precision alignment process. And yet, even excellent alignment of the shaft centers of rotation does not in itself. This single source reference offers a comprehensive analysis of coupled rotating machinery systems, providing practical guidelines for solving complex alignment tasks. These changes in the shaft alignment can be accommodated in a. The additional requirements serve to propose further safeguards against shaft alignment bearing. A variety of shaft alignment fixtures are available for performing rim face alignment. Minimize wear, production stoppages and unnecessary costs with shaft alignment. Quite often, bad machine condition can be obvious, but repairs are made without correcting alignment faults, or removing the underlying causes of misalignment such as poor foundations, excessive temperature gradients, strain from connected pipes, etc. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in operation. Rim and face alignment formula method tamil youtube. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication.
Bearing clearance radial gap between the shaft and the bearing shell. This module teaches participants about the proper techniques for performing rim and face alignments. The participant is able to learnbydoing in the course. The two most common dial indicator alignment methods are the rim face and reverse rim dial methods. Bearing off set vertical displacement of the contact face of the bearing from the optically established central line of the shafting. Proper shaft alignment is especially critical when the motor is operated at high speeds. Aim to have all soft foot readings within 2 mils thou. After completing this course, participants should be able to describe the basic types of misalignment, describe general preparations for a rim and face shaft alignment procedure. The original function of a flexible coupling was to accommodate the small amounts of shaft misalignment remaining after the completion of a shaft alignment using a straight edge or feeler gauges. Then, through the use of a laseralignment system and a specially constructed cardan offset bracket, the angle between the machines can be easily determined and corrected.
Standard industry norms for alignment tolerances are cited in table 1. Shaft alignment procedure pdf and guidelines for the implementation of good shaft alignment for standard rotating. Plane a is the position of indicator tip at adjustable machine while plane s is at stationary machine. 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. Rim and face alignment method are oldest method used for shaft alignment of misaligned equipment shaft. Each precision alignment method has its own unique problems and there are also problems which. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. Thanks to flexible brackets you can install the equipment in the most appropriate place. After removal of the cardan shaft, the cardan bracket fig. Practice and learn different shaft alignment methods using dial indicators or lasers. Engines, gearboxes and propeller shafts on ships are aligned using the easylaser system. Rim and face alignment the classic, most often described and used rim and face format is the one described here in figure 1 of this chapter. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition.
Alignment tools and procedures that take thermal growth. Shaft alignment handbook, third edition, crc press, 2006. Shaft alignment handbook crc press book rotating machinery is the heart of many industrial operations, but many engineers and technicians perform shaft alignment by guesswork or with limited knowledge of the tools and methods available to accurately and effectively align their machinery. To keep standard rotating machines running smoothly, industrial maintenance personnel must stay updated with various alignment tools and methods. In this method two dial indicator rim and face dial are used to determine the relative position of movable shaft with respect to stationary shaft. Practice alignment procedure when one or both shafts are locked practice alignment when one or both shafts have limited rotation. The primary and optional data entry windows intuitively tells you what information is required, and if you make a mistake, there are background routines to point out your errors.
The rotating equipment machine shaft coupling alignment training course will cover several alignment methodstechniques like straight edge, rim face alignment and reverse dial indicator alignment procedure. An essential component of any successful alignment procedure is the. Soft foot is a common issue when aligning rotating equipment. Sighting through as part of shaft alignment procedure eliza jaryszkami ska west pomeranian university of technology, szczecin, institute of manufacturing engineering, al.
Dec 01, 2002 shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. 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. This method is usually used when laser alignment equipment is not available for use. With the coupling broken, mount the fixture to the stationary shaft or coupling hub. 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 the industry. Shaft misalignment is the usual culprit behind high levels of machine vibrations and premature bearing fatigue. Precision shaft alignment using dial indicators abstract even with the advent of new computerized dial indicator and laser alignment systems, knowledge of the basics of shaft alignment is a must. Fixturlasers shaft alignment products are available in more than 70 countries. They contain software for straightness and flatness measurements. Machines with coupling hubs that are axially close to. The rim and face alignment method is one of the most common alignment techniques used in industry. The bent shaft affects alignment process by showing improper reading. Apr 21, 2017 there is another side to the alignment story. As pictorially presented, it simply means the dial indicators were arranged, tightened, and adjusted to zeroes at the not shown opposite position, then rotated 180 and are now shown in the correct.
With a loadonpad design, figure 1 the shaft is free to laterally within bearing clearance, and alignment data is difficult to obtain without temporary bearing shims to stabilize the sham with a loadbetweenpad design, figure 1 b, the shaft remains stable during the alignment procedure. Draw a simple diagram in you alignment sheet to show how the dial indicators are fixed, distances of inner and outer boards ib, ob. This course is designed to familiarize participants with the basic principles associated with measuring and correcting shaft misalignment using the rim and face method. Shaft alignment rim and face contact ihrdc sales for corporate purchases add to cart price. The fixturlaser nxa geometry packages are characterized by their user friendliness and versatility. Hope this will give an idea of what is to be done and how.
Shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Learn vocabulary, terms, and more with flashcards, games, and other study tools. For example, the only correct way to express shaft alignment tolerances is in terms of alignment conditions at the coupling, and we will describe several ways to do this. Alignment process alignment process consists of the design and analysis, the alignment procedure and measurements. Shaft coupling alignmentprocedurerim and facemethod 2. 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. This 2day course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools.
These changes in the shaft alignment can be accommodated in a few different ways. There are many factors that effect measurement accuracy, largely depending on the hardware setup and method used. Changes in the temperature of machines from off line to running can have a significant impact on the shaft alignment. In addition to alignment quality and repeatability problems, it can cause of machinery vibration, reduce life in electric motors, and cause internal clearance problems.
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