How is the alignment job done in your plant, by proventested alignment procedure and methods or by trial and error. 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. For appropriate applications, the time, expertise and instruments needed to achieve precision alignment tolerances of less than 0. Cons cost by far the most expensive of methods available. The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment, etc. Misalignment may account for over 50% of malfunctions in rotating machinery, leading to problems such as worn or broken couplers, vibration, and excessive wear of bearings, seals and wear rings.
Dial gauge alignment procedure in covered with detailed animation. Reverse alignmentunderstanding centerline measurement by c. The motor is the prime mover, transferring power to the pump by the use of a coupling. Pump alignment free download as powerpoint presentation. 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.
Motor pump alignment is the process of aligning shaft centerlines between a motor and a pump. The goal of this method is to provide the technician with the recommended approach for the quickest way with quality alignment. 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. Set the angular alignment indicator a to zero on left. Figure 1 shows the best alignment that can expect from the three most prevalent alignment methods practiced in the industrial, worldwide. Pdf dial indicator alignment procedure hussain vasadwala. Stan shows you how to perform an alignment in just one or two moves using dial indicators and the vertizontal compound. Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability. Cte, new videos added to cte skills library the importance of shaft alignment. It should now be easy to finetune the motor movement within the allowable alignment target without becoming bolt bound. Machine alignment for maintenance personnel in drinking water and wastewater facilities. The alignment training is suitable for technicians undertaking machine alignment, coupling.
Improper alignment leads to increase of stresses in the shafts and thus on the equipment, which might result in break down of the machine. Vibration wear energy usage proper alignment increases. With a focus on the core alignment tasks, the tksa 11 is designed to be a very easytouse instrument that is especially suitable for alignment learners and compact applications. A laser shaft alignment by ipspsds for rotary machine article pdf available in international journal of engineering and technology 44. Pdf basic shaft alignment workbook for industrial rotatin. It is an absolute requirement for machinery before the machinery is put in service. Standard industry norms for alignment tolerances are cited in table 1. Aim to have all soft foot readings within 2 mils thou. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication.
Based on the research and actual industrial machine evaluations, shaft alignment tolerances are now more commonly based on shaft rpm rather than shaft diameter or coupling. Additionally, reverse dial alignment does not require removal of the coupling to collect data. Alignment accuracy is critical to pump and driver longevity as stated above, and generally the better the alignment the longer the pump and driver bearing life. The difference between the top and bottom reading is the sag each time alignment reading is taken then the sag must be accounted for subtracting pump motor aligning the shafts centerlines from side to side the indicators are zeroed on the left and read at the right make sure that you always view the dti from pump side there is no sag. A practical guide to shaft alignment plant services. Parallel or lateral misalignment angular misalignment combined angular and lateral misalignment. The fixtures should include an assortment of rods to span various coupling lengths. The course covers several alignment methods common to motor shaft alignment like straight edge alignment, rim face alignment. For maintenance personnel in drinking water and wastewater.
Apr 27, 2020 point method this alignment method allows you to begin collecting measurement points at any angle of shaft rotation and automatically collects a measurement anytime you stop rotation. Installation, operation, and maintenance manual goulds pumps. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. Pump shaft alignment method and procedure marinesite. Shaft alignment training course ppt presentation and. Failure to achieve proper alignment, a condition referred to as misalignment, will result in increased pump vibration, decreased bearing life, and has the potential. Decreases downtime of machine, which leads to a loss of production. Alignment is important, but we can get away with the least accurate method. Shaft alignment should be an organized and simple process. Therefore, the straight edge and taper gauge or feeler gauge, or caliper method would be appropriate figure 1. It is important to establish a set procedure to perform alignments. A variety of shaft alignment fixtures are available for performing rimface alignment. Shaft alignment is the process to align two or more shafts with each other to within a tolerated margin.
Eliminating prealignment and minimizing setup time is intrinsically engineered into the vlsat through the utilization of our exclusive 30mm ccddetectors. The results have led to a much different method of evaluating the quality of a shaft alignment and to increasingly accurate methods of correcting misaligned conditions. 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. Shaft alignment training course ppt presentation and machine. This method is often considered so complicated that many users have developed step by step worksheets, plotting boards, programmable calcula189 tors, and computeraided laser devices that can guide the aligner through the procedure without a real understanding of the funda mentals of alignment. A rim and face method reversed indicator method laser method for the shaft alignment of all rotor equipment, including centrifugal pumps, it is most correct to apply a laser method. This is probably the most common configuration of coupled machines in industry. Before starting the pump installation process mechanical or ac engineer to study the pump manufacturers written installation and alignment instructions. Type of misalignment shaft alignment is the process to align two or more shafts with each other to within a tolerated margin shaft in alignment. Combined angular and parallel or lateral misalignment. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail. These packages expedite the precision alignment process. Shaft alignment training with vibralign professional trainer stan riddle. Alignment of pumps one of the most important parts of pump setup is making sure that the pump and the drive motor are carefully aligned.
For example, the only correct way to express shaftalignment tolerances is in terms. Before you start this procedure, make sure that the dial indicators are properly attached for measure ment. The shafts of the pump and drive unit must be closely aligned. The alignment of misaligned shaft are done by using different types of shaft alignment methods which are mention below. Benefits, methods of proper pump to motor alignment. Shaft misalignment is responsible for as much as 50 percent of all costs related to rotating machinery breakdowns. Dec 17, 2011 proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability. Benefits for having fire pump shaft alignment testing. A typical pump in an hvac application requires a fourpole motor 1,750 to 1,800 rpm, depending on slip. Shaft alignment procedure mantenimiento planificado. 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.
Oct 08, 2017 shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin. This method abbreviates time of alignment, not only considerably, but also allows to conduct alignment with maximal exactness to 0,001. The alignment of the pump flanges to the connecting piping is called flange alignment. The horizontal move is the part of the alignment process that aligns the shafts centerlines from side to side. The book is reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. This provides you with exact and stable measurement results and enables the system to be more interference. It can be shown that accepting the simple foot corrections approach can. The computer then makes recommendations for adjustments.
Selection and use of a commercial package designed to accommodate a variety of shaft diameters is recommended. Sep 01, 2015 definitions of shaft alignment and associated termshow shafts become aligned and unalignedpump alignment procedure using a dial indicator. Prueftechnik are specialists in the alignment and monitoring of rotating machines, we. Method statement for installation and balancing of chilled. Start with 3 mm 18 of shims under each foot with the hold down bolts centered. Pdf a laser shaft alignment by ipspsds for rotary machine.
Laser alignmentthis method uses lasers to determine the relative shaft positions. Produce pdf reports directly from the display unit and. This method produces acceptable results, but is less accurate than the reverse dial indicator method covered in this application note. Dec 01, 2002 the results have led to a much different method of evaluating the quality of a shaft alignment and to increasingly accurate methods of correcting misaligned conditions. We do not suggest that the methods illustrated are the only ones available. Nov 27, 2010 the course covers several alignment methods common to motor shaft alignment like straight edge alignment, rim face alignment, reverse dial indicator alignment and laser alignment. Using a straight edge across the coupling, jack and shim the feet and retighten bolts till the coupling halves are within 0. Since then, a large amount of feedback has been accumulated. 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. Rotating equipment alignment methods and training youtube.
Shaft alignment methods explained bright hub engineering. Apr, 2014 shaft alignment training with vibralign professional trainer stan riddle. This online shaft alignment training course by cte skills features highquality and informative video that walks you through dial indicator shaft alignment procedure with ease. Rough align the equipment again, using a reverse indicator, laser alignment or similarly accurate technique. The main purpose of shaft alignment is to make sure that the center line of the motor rotor shaft coincides with the center line of the driven machinery i. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. Shaft alignment can be done utilizing several methods and tools, such as straightedges, calipers, dial indicators, optics, or laser systems.
The roughin alignment involves bringing the pump and drive shaft coupling halves square and inline. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment. Pump shaft alignment method and procedure straight edge and filler gauge method. The initial version of this procedure was published several years ago by me. Improper alignment leads to increase of stresses in the shafts and thus on the equipment, which might result in. Laser alignment this method uses lasers to determine the relative shaft positions. The 10 steps outlined in this article reflect modifications. The goal of the alignment process is to create a straight line through the coupling. View the machine from the pump end, zero the indicators on the left, and then rotate and read on the right. Reverse alignmentunderstanding centerline measurement by. Vibralign is committed to helping businesses use their resources more efficiently and effectively.