The objective of optimized shaft alignment is to increase the operating life span of rotating machinery. A practical guide to shaft alignment plant services. Prealignment checks and corrections are performed to either improve machinery reliability or to facilitate the alignment process. Fill base plate completely with non shrink, non metallic grout, with metal blocks and shims or wedges in place. Radial, angular and axial alignment of the gearbox and alternator in the horizontal axis can be.
Machine alignment for maintenance personnel in drinking water and wastewater facilities. This chart may be applied to all machine and coupling types. It is an absolute requirement for machinery before the machinery is put in service. Vibration wear energy usage proper alignment increases reliability. Shaft alignment is the positioning of the rotational centers of two or more shafts such that they are colinear when the machines are under normal operating conditions. Repeat this procedure for the 3 to 9 oclock direction. Shaft alignment is the process to align two or more shafts with each other to within a tolerated margin.
I have tried to keep the text to a minimum and portray as many of the alignment procedures and techniques in graphical form or in pictures as much as possible. The initial version of this procedure was published several years ago by me. How is the alignment job done in your plant, by proventested alignment procedure and methods or by trial and error. Another way to gather this data is to perform a hot alignment check of the affected piece of equipment. Machinery alignment tolerance tables the suggested alignment tolerances shown here are general values based upon experience and general industry standards and should not be exceeded. Pump maintenance repair brian trombly mo droppers cummins bridgeway, gaylord, mi the basic centrifugal pump consists of two main elements. After alignment is correct, tighten foundation bolts evenly but not too firmly. The most secure digital platform to get legally binding, electronically signed documents in just a few seconds. Then the motor should be moved into proper alignment and joined to the coupling.
The stationary element which includes a casing, stuffing box or seal cavity and bearings. Cte, new videos added to cte skills library the importance of shaft alignment. The prealignment process could include all of the following checks. Adjust the machine in live mode in both horizontal and. Machinery alignment tolerance tables impact engineering. The procedure for doing reverse dial indicator alignment is not a difficult one. For maintenance personnel in drinking water and wastewater. Dec 01, 2002 shaft alignment is the positioning of the rotational centers of two or more shafts such that they are colinear when the machines are under normal operating conditions. Motorpump alignment is the process of aligning shaft centerlines between a motor and a pump. Alignment method selection issues the following list contains some of the issues that help to determine what will be the alignment method of choice. Installation, operation, and maintenance manual goulds pumps. The alignment of the pump flanges to the connecting piping is called flange alignment.
Proper shaft alignment is especially critical when the motor is operated at high speeds. With the coupling broken, mount the fixture to the stationary shaft or coupling hub. Once you have performed this cold alignment between the driver and pump, operate pump until pump and driver are to full operating temperatures. Pump shaft alignment method and procedure marinesite. The machine is aligned off line and the results of the alignment are documented horizontal angularity, horizontal offset, vertical angularity, and vertical offset. Now the shaft alignment measurement procedure can begin. It is also possible to align three 3 or more elements in more complex machines.
The alignment of the pump shaft to the drive shaft of the motor, gear, or engine driving the pump is called shaft alignment. You cannot move the pump because it is connected to the piping. In either case, prealignment is a very important phase of the alignment process. In this cooling tower spacer shaft configuration, the distance from the motor to the gearbox is more than 12 ft. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. Consider the procedure often followed during an alignment check when vibration analysis or another condition monitoring technology indicates misalignment. Pump shaft alignment method and procedure straight edge and filler gauge method. Installation and alignment issue 2 102009 section 3 alignment procedure page 31 section 3 alignment procedure 3 alignment procedure note. Proper shaft alignment is not dictated by the total indicator reading tir of the coupling hubs or the shafts, but rather by the proper centers of rotation of the shaft. 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. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. After grout has hardened, fully tighten foundation bolts.
After youve removed the coupling bolts and separated the two couplings, spray the faces of the bolts and couplings with a light lubricant, such as crc formula 656 marine lubricant. The proper shaft alignment procedure is to secure the. The main factor that determines the critical nature of alignment is shaft speed. Visually check coupling, pipehangers, base bolts, coupling spacing etc. 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.
They are 1 straight edge with a taper gauge, feeler gauge, or caliper. Prior to the actual alignment procedure, it is essential that. The greater the distance, the greater the accuracy. Start a free trial now to save yourself time and money. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. Alignment report hung seng huat engineering product co. A pdf with all measurement data is automafically generated.
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. Reverse dial indicator alignment system alignment is the procedure by which the shaft centerline of one machine element, such as a motor, is adjusted to be colinear with the centerline extension of another machine shaft, such as a pump. The acknowledgement of these conditions has been sent separately to the purchaser. Since then, a large amount of feedback has been accumulated. However, almost all of our pumps are api pumps and are split line mounted. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. 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 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.
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. Vibralign is committed to helping businesses use their resources more efficiently and effectively. This will aid in rotating them during the alignment procedure. Listed below are descriptions of some of the components most closely associated with the unit alignment. Shut down your machinery and retake your alignment readings. Methods of alignment there are three basic methods of align ment.
Check alignment and take corrective measures required to ensure perfect alignment. If a hot alignment check is required, determine alignment method to be used. Motor pump alignment is the process of aligning shaft centerlines between a motor and a pump. The motor is the prime mover, transferring power to the pump by the use of a coupling. The 10 steps outlined in this article reflect modifications. Use this simple and effective procedure for shaft alignment of your rotating equipment. An essential component of any successful alignment procedure is the determination and. To provide an overview of alignment, the discus sion in this. Employees must follow standard operating procedures when applicable. Method statement for installation and balancing of chilled. If a manufacturer of a machine or coupling require tighter alignment tolerances, those should be used. The content of this infographic is a basic guide to realign machines. Aim to have all soft foot readings within 2 mils thou.
The book is reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. Standard industry norms for alignment tolerances are cited in table 1. The pump shaft should now be centered in the stuffing box and in its guide bearings. B describing tolerances there are a number of acceptable ways to describe misalignment at the coupling, and to define permissible misalignment tolerances. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. This task is to be undertaken by suitably trained and qualified service personnel only. Pdf basic shaft alignment workbook for industrial rotatin. Alignment simple steps to accurate alignment its a long. Fill out, securely sign, print or email your pump alignment form instantly with signnow. Empowering pumps is the information and connection hub for the global pump industry. During the peak season our staff focuses on the daily maintenance of the. How soon are you planning to invest in asset condition management tools. The machine is aligned off line and the results of the alignment are documented horizontal angularity, horizontal offset. 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.
It is recommended that the shaft diameter back in mm are standard or rounded numbers. Hot alignment readings should be taken within 1015 minutes of securing. Pump and motor preventative maintenance program thank you for this opportunity to provide your facility with a proactive preventative. 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. Pump alignment form fill out and sign printable pdf. It is very important that the pumpmotor alignment is carried out correctly. There are several steps which need to be taken for a successful alignment job. The shafts of the pump and drive unit must be closely aligned. Moving a pump, for instance, would impose stress upon the connecting piping. The process with rotalign pro is identical, except that the adjustment is monitored by observing beam movement in the coordinate display screen. Tag out the machine, pull the coupling guard, attach the laser or dial indicator fixtures, take a set of readings.
This is probably the most common configuration of coupled machines in industry. The product must not be operated beyond the parameters specified for the application. Standard maintenance procedure pdf the practices and procedures necessary to achieve the standards that are expected. 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. Terminations shaft diameter up to 28 mm are made with tolerance j6, shaft diameters from 28. I would not feel comfortable setting a single temperature value for hot alignment of any and all foot mounted ansi pumps. The proper shaft alignment procedure is to secure the driven equipment first, and then install the coupling to the equipment. Determining whether the existing alignment condition is acceptable or the actual machine moves resulted in an acceptable alignment condition can be quantified by referencing the chart at the end of this application note. 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 rotating element which includes an impeller and a shaft.
The best method to resolve this problem is to fillweld the. 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. Improving efficiency will decrease both maintenance and operating costs. With dual lasers, the method used in easylaser, the accuracy depends on distance a.
1077 1429 1243 1383 1496 784 366 618 1453 263 208 589 1495 1324 1352 54 394 417 206 452 847 605 1383 1476 947 228 1208 124 947 1315