Employees must follow standard operating procedures when applicable. 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. If the two sets of alignment readings were documented, a set of cold alignment targets can be calculated. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. Standard industry norms for alignment tolerances are cited in table 1. The proper shaft alignment procedure is to secure the driven equipment first, and then install the coupling to the equipment. Vibralign is committed to helping businesses use their resources more efficiently and effectively. Our vision is to build a digital community through websites, enewsletters, and social media channels that allows pump industry professionals to exchange ideas, news stories, product information, case studies, videos, event information and more. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. The motor is the prime mover, transferring power to the pump by the use of a coupling. When aligning a cold unit, see the cold settings for vertical parallel alignment table. A motor with a starting temperature of 70 f is perfectly aligned to the pump shaft it will be driving. Listed below are descriptions of some of the components most closely associated with the unit alignment.
The alignment targets for this machine will be the opposite of the changes in the alignment parameters. Vertical centrifugal inline pumps tailor made pump. Machine type pump motor vertical angle horizontal angle horizontal offset. The pipe should be targeted so as not to place strain on the pump.
The alignment of the pump flanges to the connecting piping is called flange alignment. The party responsible for assembling the pump set shall. Steps to successful installation of vertical circulating. Where flowserve has supplied only the bare shaft pump, the ex rating applies only to the pump. Bear in mind if youre talking a footmounted hot water pump youll have to perform a hotalignment as well as the preliminary cold alignment, as depending on the pump size it can grow quite a bit for a proper alignment, this means more than a few thou of an inch. In most cases, the vertical motor is mounted to a nema cface adaptor. Thermal compensation stationary s machine movable m machine. Vertical turbine pump vtp and driver alignment is critical for extending the serviceable life of the driver, pump bearings and mechanical seal assembly while also providing vibration free service of your installation. The standard provides a holistic approach to the shaft alignment process.
The shafts of the pump and drive unit must be closely aligned. View the machine from the pump end, zero the indicators on the left, and then. The performance curves given in the catalogue are valid for water whose density and viscosity are. Aim to have all soft foot readings within 2 mils thou. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. Vertical centrifugal inline pumps tailor made pump solutions.
Pump shaft alignment method and procedure marinesite. For maintenance personnel in drinking water and wastewater facilities. When installing the pump and driver, experienced technicians will perform a rough alignment based on visual indicators. Before starting the pump installation process mechanical or ac engineer to study the pump manufacturers written installation and alignment instructions. When performing a vertical shaft alignment, the process will be different. They also will ensure that all machine feet are in good footplane and have 0. Misalignment may cause the pump and driver to operate with. Alignment method selection issues the following list contains some of the issues that help to determine what will be the alignment method of choice. 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. Repeat this procedure for the 3 to 9 oclock direction. Model vit installation, operation, and maintenance 3 introduction and safety safety warning. Rotate the pump shaft by hand to mix the antifreeze. Then the motor should be moved into proper alignment and joined to the coupling. Regardless of the method used you must correct the alignment in the vertical and the horizontal plane.
Secure or prepare the documents upon which alignment readings. It is an absolute requirement for machinery before the machinery is put in service. The speed of use and the precision in alignment means that investing in a laser based shaft alignment system usually pays for itself within 36 months. This is because checks are so easy and fast to carry out. Laser alignment is an essential component of a viable maintenance. Easylaser is used to align pumps and mo tors for all. For the above question, most supervisors and engineers would immediately respond, we alwaysonly use proven, tested alignment methods techniques procedure and our technicians are well trained to handle any difficult alignment requirement. Remember, alignment is the last task to be carried out on a machine before it is run up for testing prior to return to service other than for insitu balance corrections.
In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub. Empty water inside the pump casing, suction line and discharge line. The process with rotalign pro is identical, except that the adjustment is monitored by observing beam movement in the coordinate display screen. If a hot alignment check is required, determine alignment method to be used. Machine data stationary s machine movable m machine. This procedure is to be used as a guide for the initial system installation, or as a reference for optics replacement, or for re alignment if necessary. During the peak season our staff focuses on the daily maintenance of the. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition.
A layout drawing should be approved and pumps should be installed in locations indicated making sure that there is sufficient access space for periodic maintenance, removal of motors impellers. Oct 17, 2015 is video me cri 2 series vertical pump ki alignment ko tight kar rahe he. Sep 01, 2015 this alignment training course covers areas such as. The procedure for doing reverse dial indicator alignment is not a difficult one. Failure to achieve proper alignment, a condition referred to as misalignment, will result in increased pump vibration, decreased bearing life, and has the potential. It is assumed that the gantry is square to the xaxis, all support equipment is in place and properly working, and all of the.
Produce pdf reports directly from the display unit and save to usb memory. Alignment simple steps to accurate alignment its a long. Installation, operation, and maintenance manual goulds pumps. Shaft alignment is the process to align two or more shafts with each other to within a tolerated margin. When a driver like an electric motor or a turbine is coupled to a pump, generator, or any other piece of equipment, it is essential that the shafts of the two pieces are aligned. 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. This is probably the most common configuration of coupled machines in industry. Alignment results hot alignment results cold represents the change in the alignment condition of the machine from cold to hot. To correct for angular and parallel misalignment in the. Definitions of shaft alignment and associated termshow shafts become aligned and unalignedpump alignment procedure using a dial indicator. Professional measurement and alignment system for rotating machines. Now the shaft alignment measurement procedure can begin. Despite the best efforts to precisely align rotating machinery shafts, dynamic movement commonly believed to be due to the thermal growth of the machine casings has resulted in machines operating.
Many vertical pumps utilize a flexible coupling to transfer power from the motor to the pump, so proper shaft alignment is an important part of overall machine reliability. Precision maintenance pre alignment check list following this checkoff list will ensure an alignment that will be kept when the machine is in operation and will last for an extended mean time between repairs. Many maintenance personnel have experience with aligning standard coupling configurations, such as a motor to a pump, but some are less confident when theyre asked to. How to do the alignment for vertical pumps with motor artisi mechanical 11 jan 15. Alignment employ laser or reverse dial indicator technology to align pump and motor. Clean up all spills in accordance with safety and environmental procedures. 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. Steps to successful installation of vertical circulating water pumps following the correct procedures for pump and motor alignment is necessary for reliable operation. This wear is not severe but in order to bring the shaft back to the o. An essential component of any successful alignment procedure is the. With spacer type couplings, a dial indicator should be used to obtain these readings.
The readings obtained will tell you how far out of. Before starting the pump the reservoir should be filled to the minimum level so as to completely sub merge the pump impeller housing in the liquid which assures priming of the pump. Method statement for installation and balancing of chilled. Pdf dial indicator alignment procedure hussain vasadwala. The difference is also that in using a laser based alignment system the machines are actually checked. Standard maintenance procedure pdf the practices and procedures necessary to achieve the standards that are expected.
The inclinometers in a laser alignment system work against gravity in the horizontal plane for a typical horizontal shaft alignment. Add small amount of antifreeze inside the pump casing if it is not possible to empty it completely. Clean, dress up and file any burrs from mounting faces and anchor bolt holes. Pump shaft alignment method and procedure straight edge and filler gauge method. Clean the pump casing and impeller by jetting clean water for a short time. Is there an iso doc tell it or some industrial tradition. This online shaft alignment training course by cte skills features highquality and informative video that walks you through dial indicator shaft. The pump shaft should now be centered in the stuffing box and in its guide bearings. This list contains all the items that should be checked in a worst case scenario. If the pump is turning the wrong direction, reverse any two of the line wires at the motor in the conduit box or at the motor starter. This procedure is to be used as a guide for the initial system installation, or as a reference for optics replacement, or for realignment if necessary.
Api recommended practices 686, section 7, also does a good job covering alignment procedures for various types of equipment. 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. A practical guide to shaft alignment plant services. Alignment report hung seng huat engineering product co. Dial indicator alignment procedure the procedure for doing reverse dial indicator. There are several steps which need to be taken for a successful alignment job.
How is the alignment job done in your plant, by proventested alignment procedure and methods or by trial and error. If any pressurecontaining device is overpressurized, it can explode, rupture, or discharge its contents. Rotate both shafts and read the indicator at 4 points, 90 apart. Utilizing the soft foot function in laser alignment systems works well. Cte, new videos added to cte skills library the importance of shaft alignment. Motorpump alignment is the process of aligning shaft centerlines between a motor and a pump. Dec 01, 2002 part one of a fourpart series that will cover alignment fundamentals and thermal growth, and highlight the importance of field measurements through two case studies. The difference in a 15min alignment and an eighthour alignment is often correcting the soft foot. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. Specify that bolting which connects pump to pipe must fit without force. Align before and after the pump and piping are bolted together. The operator must be aware of the pumpage and take appropriate safety precautions to prevent physical injury. Empowering pumps is the information and connection hub for the global pump industry.
One of the most important parts of pump setup is making sure that the pump and the drive motor are carefully aligned. Mount the indicator base on the driver coupling hub so that the indicator reads on the face of the pump hub. Produce pdf reports directly from the display unit and save to usb. By william livoti weg power industry manager in usa 12012015. 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.
Moving a pump, for instance, would impose stress upon the connecting piping. Shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Aligning vertical pumps empowering pumps and equipment. How to do the alignment for vertical pumps with motor. Shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin.
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