Measurement of gapsag for flange coupling main engine intermediate shaft. Shaft aligning techniques shaft alignment by conventional method shaft alignment by dial test indicator dti shaft alignment by using laser equipment shaft alignment by using computer. It is indicated on the face of the dial by a dial finger. Reverse rim dial vs rim face universal technologies intrctv. While the dials may seem confusing at first, theyre easy to read once you understand what. The other advantage you can save the alignment results and down load a pdf report. Pdf a practical guide to shaft alignment ahmad rohman. This paper covers four dial gage method, which overcome all typical reasons of unsuccessful and difficult alignments, which are observed in thermal power stations. These procedures must also be followed when carrying levelling and alignment tasks. Reverse dial indicator alignment procedure free download as pdf file. Try to put the stem of dial gauge perpendicular to the surface of coupling.
In the right hands, a very accurate alignment can be performed with dial indicators. They should be used only if no other tolerances are prescribed by existing inhouse standards. The book is reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. Offset misalignment vs dial readings if a dial indicator measuring on the rim is set to zero and then rotated 180 degrees the dial reading tir will be 2x the offset misalignment. Dial indicators are an essential tool for maintenance pros. Lathe alignment dial indicator pdf one day, you will discover a new adventure and knowledge by spending more money. It uses two dial indicators, one on each shaft, to measure the parallel and angular misalignment as. Shaft alignment training course ppt presentation and. Dial indicator alignment basics alignment knowledge.
There are several steps which need to be taken for a successful alignment job. Hot alignment in the past, a hot alignment check may have been used to check the accuracy of the cold alignment procedure. Dial indicator principle, diagram, working, application dial indicator. A highprecision laser alignment system has been designed with dual psds position sensing detector to change traditional manual way of shaft alignment and to make the measurement easier and more. However, even under the best of circumstances, it will be a timeconsuming task with many traps and pitfalls for the. Compensate for sag by dialing in the amount of indicator bar sag as a positive value at 12. Dial gauge for measurements of intermediate shaft bearing load. Dial indicators can be used to check round parts like wheels for straightness and are commonly used in machine shops. The plunger is a spring loaded part that can be depressed into the case causing the dial to move clockwise.
Dial indicator marking the number 100 and facing the front of the machine. Fixture mounting procedures are obviously dependent on the specific type of hardware being used. The most reliable way to ensure machinery works as it should, without disruption, is through a shaft alignment with dial indicator procedure. This measurement will be made by using dial indicators that measure in 0. Coupling alignment training using straight edge, feelers gauges, dial indicators and laser alignment equipment.
Getting ready one step at a time familiarity may not always breed contempt, but in precision gaging, it can certainly. This allows maintenance to keep a record on what machines are precision aligned and. This method produces acceptable results, but is less accurate than the reverse dial indicator method covered in this application note. This procedure should be done at the same time as the reverse dial indicator readings are taken.
Shaft alignment training with vibralign professional trainer stan riddle. The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment, etc. Shaft couplingalignmentprocedurereverse dial method 2. Shaft aligning procedure preliminary checks visually check coupling, pipe hangers, base bolts, coupling spacing etc. Shaft alignment industrial wiki odesie by tech transfer. 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. For maintenance personnel in drinking water and wastewater. There are two commonly use methods to align rotating machine shafts using dial indicators. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail.
A procedure for determining the amount of sag in a bracket is as follows. The skf tksa 11 is the first instrument on the market that uses inductive proximity sensors, enabling accurate and reliable shaft alignment to. A rough alignment is necessary due to the range limitations of the dial indicators. A popular method used for years and is still in use today is the rim and face method. Dial indicator alignment basics dial indicators are measuring devices designed expressly to measure relative position. Dial indicator principle, diagram, working, application. Also, each of the alignment methods will also be discussed in detail later in this manual. Improper alignment leads to increase of stresses in the shafts and thus on the equipment, which might.
This video gives a brief overview of how dials can be used to measure shaft alignment, and can even be adjusted to. The two data sets and the cold alignment dial indicator readings enable the determination of vertical. Then, when the train is in its operating condition, another set of readings are taken. The use of dial indicators for the vast majority of shaft alignment tasks where a. Reverse dial indicator alignment procedure machines. The graphical illustration of a single dial indicator sweep is.
This 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. If sag free brackets are not available, sag greater than. In this video we will describe shaft coupling alignment procedures, pump alignment training,drive shaft alignment,shaft alignment using dial indicator,how to do an alignment,axial alignment. Machine alignment for maintenance personnel in drinking water and wastewater facilities. Vibralign is committed to helping businesses use their resources more efficiently and effectively. The primary parts of a dial indicator are the face or dial, the case, and the plunger. Basic shaft alignment workbook preface w elcome to the introductory book on. The primary reasons why machinery is misaligned is lack of proper training, improper tools to do the job, and that people are not given enough time to do it right. Professional measurement and alignment system for rotating machines. Free pdf book on the plant and equipment wellness way to. How accurate are dial indicators for shaft alignment. Pdf a laser shaft alignment by ipspsds for rotary machine. 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.
Dial gauge alignment procedure in covered with detailed animation. Today im going to talk about 3 dial indicator concepts. The suggested tolerances shown on the following pages are general values based upon over 20 years of shaft alignment experience at. It operates on the principle, that a very slight upward pressure on the spindle at the contact point is multiplied through a system of gears and levers. We grab a gage and take a measurement without stopping to go through those preliminary checks and. A set of procedures for using the reverse dial indicator method for levelling and alignment of machines and engineering components.
One of the primary challenges of all methods used for shaft alignment on rotating machinery is obtaining valid measurement data. However, factory tests have shown that the results of the hot alignment check are inconsistent. Total indicator reading ill zero my dial indicator at 12, and then roll it 180 degrees to 6. A practical guide to shaft alignment plant services. In this online shaft alignment training by cte skills, workers will learn how to use a dial indicator to align shaft. Reverse dial alignment sti vibration monitoring inc. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment. There are many factors that effect measurement accuracy, largely depending on the hardware setup and method used. 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 traditional precise shaft alignment method is dial. The procedure for doing reverse dial indicator alignment is not a difficult one. 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. This method uses two dial indicators that take shafttoshaft readings and is. Produce pdf reports directly from the display unit and.
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