The proper shaft alignment procedure is to secure the driven equipment first, and then install the coupling to the equipment. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. Professional measurement and alignment system for rotating machines. The motor is the prime mover, transferring power to the pump by the use of a coupling. Clean up all spills in accordance with safety and environmental procedures. Mount the indicator base on the driver coupling hub so that the indicator reads on the face of the pump hub. Add small amount of antifreeze inside the pump casing if it is not possible to empty it completely. Now the shaft alignment measurement procedure can begin. 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. Oct 17, 2015 is video me cri 2 series vertical pump ki alignment ko tight kar rahe he. How to do the alignment for vertical pumps with motor. Repeat this procedure for the 3 to 9 oclock direction. If a hot alignment check is required, determine alignment method to be used.
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. This online shaft alignment training course by cte skills features highquality and informative video that walks you through dial indicator shaft. Vibralign is committed to helping businesses use their resources more efficiently and effectively. Is there an iso doc tell it or some industrial tradition.
There are several steps which need to be taken for a successful alignment job. Specify that bolting which connects pump to pipe must fit without force. 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. 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. Alignment simple steps to accurate alignment its a long. The proper shaft alignment procedure is to secure the driven equipment first because moving a pump, for example, would stress. Thermal compensation stationary s machine movable m machine. Vertical centrifugal inline pumps tailor made pump solutions. Shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Empty water inside the pump casing, suction line and discharge line. Produce pdf reports directly from the display unit and save to usb. Shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin.
Cte, new videos added to cte skills library the importance of shaft alignment. This list contains all the items that should be checked in a worst case scenario. Misalignment may cause the pump and driver to operate with. With spacer type couplings, a dial indicator should be used to obtain these readings. Model vit installation, operation, and maintenance 3 introduction and safety safety warning. A guide to properly align and install vertical turbine pumps. Definitions of shaft alignment and associated termshow shafts become aligned and unalignedpump alignment procedure using a dial indicator. 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. Before aligning, the pump and motor base should be level on a pad and properly grouted. 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. 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. Installation, operation, and maintenance manual goulds pumps. 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.
Clean the pump casing and impeller by jetting clean water for a short time. For this exercise, the temperature of the pump will not change. During the peak season our staff focuses on the daily maintenance of the. 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. A motor with a starting temperature of 70 f is perfectly aligned to the pump shaft it will be driving. 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. Standard maintenance procedure pdf the practices and procedures necessary to achieve the standards that are expected. Aligning vertical pumps empowering pumps and equipment. For maintenance personnel in drinking water and wastewater facilities. In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub. An essential component of any successful alignment procedure is the. Where flowserve has supplied only the bare shaft pump, the ex rating applies only to the pump. Alignment report hung seng huat engineering product co.
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. One of the most important parts of pump setup is making sure that the pump and the drive motor are carefully aligned. This is probably the most common configuration of coupled machines in industry. Rotate the pump shaft by hand to mix the antifreeze. It is an absolute requirement for machinery before the machinery is put in service. The readings obtained will tell you how far out of. Motorpump alignment is the process of aligning shaft centerlines between a motor and a pump. Align before and after the pump and piping are bolted together. The inclinometers in a laser alignment system work against gravity in the horizontal plane for a typical horizontal shaft alignment.
Alignment employ laser or reverse dial indicator technology to align pump and motor. Regardless of the method used you must correct the alignment in the vertical and the horizontal plane. 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. 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. Easylaser is used to align pumps and mo tors for all. Pump shaft alignment method and procedure straight edge and filler gauge method. The operator must be aware of the pumpage and take appropriate safety precautions to prevent physical injury. 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. Rotate both shafts and read the indicator at 4 points, 90 apart. The party responsible for assembling the pump set shall. The alignment targets for this machine will be the opposite of the changes in the alignment parameters.
Failure to achieve proper alignment, a condition referred to as misalignment, will result in increased pump vibration, decreased bearing life, and has the potential. Secure or prepare the documents upon which alignment readings. To correct for angular and parallel misalignment in the. The standard provides a holistic approach to the shaft alignment process. View the machine from the pump end, zero the indicators on the left, and then. The shafts of the pump and drive unit must be closely aligned. 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. This wear is not severe but in order to bring the shaft back to the o. Pdf dial indicator alignment procedure hussain vasadwala. They also will ensure that all machine feet are in good footplane and have 0. The procedure for doing reverse dial indicator alignment is not a difficult one. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication.
Then the motor should be moved into proper alignment and joined to the coupling. The alignment of the pump flanges to the connecting piping is called flange alignment. For maintenance personnel in drinking water and wastewater. When aligning a cold unit, see the cold settings for vertical parallel alignment table. Vertical centrifugal inline pumps tailor made pump. How to do the alignment for vertical pumps with motor artisi mechanical 11 jan 15. Moving a pump, for instance, would impose stress upon the connecting piping. Api recommended practices 686, section 7, also does a good job covering alignment procedures for various types of equipment.
Laser alignment is an essential component of a viable maintenance. Clean, dress up and file any burrs from mounting faces and anchor bolt holes. By william livoti weg power industry manager in usa 12012015. 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. 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. 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. 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. Utilizing the soft foot function in laser alignment systems works well. The pump shaft should now be centered in the stuffing box and in its guide bearings. Empowering pumps is the information and connection hub for the global pump industry. The process with rotalign pro is identical, except that the adjustment is monitored by observing beam movement in the coordinate display screen. Pump shaft alignment method and procedure marinesite.
Listed below are descriptions of some of the components most closely associated with the unit alignment. Sep 01, 2015 this alignment training course covers areas such as. A practical guide to shaft alignment plant services. The difference in a 15min alignment and an eighthour alignment is often correcting the soft foot.
When performing a vertical shaft alignment, the process will be different. Aim to have all soft foot readings within 2 mils thou. Employees must follow standard operating procedures when applicable. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. In most cases, the vertical motor is mounted to a nema cface adaptor. Steps to successful installation of vertical circulating water pumps following the correct procedures for pump and motor alignment is necessary for reliable operation. Shaft alignment is the process to align two or more shafts with each other to within a tolerated margin. Method statement for installation and balancing of chilled.
It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. 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. Before starting the pump installation process mechanical or ac engineer to study the pump manufacturers written installation and alignment instructions. Dial indicator alignment procedure the procedure for doing reverse dial indicator. The performance curves given in the catalogue are valid for water whose density and viscosity are. The pipe should be targeted so as not to place strain on the pump. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. Machine type pump motor vertical angle horizontal angle horizontal offset.
Standard industry norms for alignment tolerances are cited in table 1. Steps to successful installation of vertical circulating. The difference is also that in using a laser based alignment system the machines are actually checked. When installing the pump and driver, experienced technicians will perform a rough alignment based on visual indicators. Machine data stationary s machine movable m machine.
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