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. A practical guide to shaft alignment plant services. Packing rings adjusted too tight loosen packing rings to release gland pressure. This wear is not severe but in order to bring the shaft back to the o. Aligning vertical pumps empowering pumps and equipment. Steps to successful installation of vertical circulating. Where are the vertical and horizontal type pumps used in. We cant align our vertical pumps since there is no adjustment due the. How to correctly install and align an api 610 vs4 vertical sump pump coupling between the pump shaft and motor pump to minimise vibration when operating.
The party responsible for assembling the pump set shall. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. Specify that bolting which connects pump to pipe must fit without force. 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. If any pressurecontaining device is overpressurized, it can explode, rupture, or discharge its contents. The units are suitable for horizontal and vertical mounting and the back pull out design means the complete. The rotating machinery shafts will undergo elastic bending when vertical or. And you are correcting two angles, one for each coupling. 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. The amount of alignment correction at the motor can seem to be very large. Since we didnt want the coupling and shaft stiffness to influence the alignment readings, the decision was made to remove the coupling bolts and rest the. Now the shaft alignment measurement procedure can begin.
Basic shaft alignment workbook preface w elcome to the introductory book on. They also will ensure that all machine feet are in good footplane and have 0. H e a d p e r s t a g e m flow ratem3hr 2 4 6 8 10 20 40 60 80 100 1 182 4 6 10 20 40 60 80 100 200 400 600 800 visit our web site at. Before aligning, the pump and motor base should be level on a pad and properly grouted. Second edition, revised and expanded, john piotrowski. The pump is a centrifugal, single stage closecoupled type. Ensure adequate lubrication flow per peerless pump recommendations 7. Align before and after the pump and piping are bolted together. 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.
Dpnt and dpnm horizontal singlestage split case pumps, series. Optimal foundation design of a vertical pump assembly. The suction bell bearing is grease packed at the factory. Ec74760 how to adjust vertical turbine pumps for maximum. Uneven wear of a mechanical seal, or machining of a shaft sleeve for packedtype pumps. Vertical centrifugal inline pumps tailor made pump. The procedure for doing reverse dial indicator alignment is not a difficult one. How to adjust vertical turbine pumps for maximum efficiency by h.
The pump shaft should now be centered in the stuffing box and in its guide bearings. 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. Furnish, install, adjust, test, and start a vertical drypit nonclog centrifugal sewage pump with extended shafts and variable speed electric motors, complete as specified below. A guide to properly align and install vertical turbine pumps. The readings obtained will tell you how far out of. When this coupling is left connected and tightened, misalignment cannot be measured conventionally by rotating both coupled shafts, because no relative movement between the shafts is allowed to occur, as would be the case with a flexible coupling. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. Where are the vertical and horizontal type pumps used in the. 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. Listed below are descriptions of some of the components most closely associated with the unit alignment. How to install and align a pump and motor coupling on an. Direct close coupled end suction pump the direct flange mounted motor is spigoted onto the bearing frame and eliminates the possibility of shaft mis alignment. The impeller and diffuser type casing are designed to deliver the head and capacity that your system requires in the most efficient way possible.
The proper alignment of a vertical shaft hydrounit is critical to trouble free operation. To achieve good, repeatable results, prealignment steps must be done. Mount the indicator base on the driver coupling hub so that the indicator reads on the face of the pump hub. Vibralign is committed to helping businesses use their resources more efficiently and effectively. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. Shaft alignment is the process whereby two or more machines typically a. Aim to have all soft foot readings within 2 mils thou. For maintenance personnel in drinking water and wastewater. Vibration wear energy usage proper alignment increases reliability. Some of the standard installation arrangements have been described below.
The alignment of the pump flanges to the connecting piping is called flange alignment. Oct 17, 2015 is video me cri 2 series vertical pump ki alignment ko tight kar rahe he. 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. 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. Gusher vertical end suction pumps with integral shaft is. Alignment of vertical pumps empowering pumps and equipment. Hold your eyelids apart forcibly with your fingers. Introduction 8 model 3910 installation, operation, and maintenance manual condition action chemicals or hazardous fluids in eyes 1. Verticallyoriented pumps are used primarily in municipal water, hvac, and power plant operations, although it is not uncommon to see small vertical pumps in many industrial applications. An essential component of any successful alignment procedure is the. 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. With feeler gauge find obvious gaps and fill them with shims, taking care of any rough soft foot condition. Nov 10, 2016 vertical turbine pumps, suitable for mounting in a pit, are usually multi stage pumps with diffusers. Space for installing the pump present on the site 3.
Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. The vertical glandless pump is simple in design and is. The process with rotalign pro is identical, except that the adjustment is monitored by observing beam movement in the coordinate display screen. Utilizing the soft foot function in laser alignment systems works well. Generally, a vertical pump assembly consists of a pump, a driving motor on top and a foundation structure at the bottom to support the pump and motor assembly. When performing a vertical shaft alignment, the process will be different. Direct close coupled end suction pump the direct flange mounted motor is spigoted onto the bearing frame and eliminates the possibility of shaft misalignment.
Shaft alignment is displayed on the labview control panel. Dynamic design verification ddv of vertical pump using. 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. Dpnl horizontal singlestage centrifugal pumps, series. Alignment simple steps to accurate alignment its a long. Sulek1 reasons for impeller adjustment fiftyeight percent of 114 irrigation wells tested by university of nebraska college of agriculture engineers used from l l j 3 to 2 times the amount of fuel required. The operator must be aware of the pumpage and take appropriate safety precautions to prevent physical injury. Model vit installation, operation, and maintenance 3 introduction and safety safety warning. Standard industry norms for alignment tolerances are cited in table 1. The pump assembly is normally called bowl assembly and it consists of suction case, impellers, discharge bowls, intermediate bowls, discharge cas. There is a definite relationship between the amount of misalignment and time between failures.
The proper shaft alignment procedure is to secure the driven equipment first because moving a pump, for example, would stress. 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. 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. Pump out of alignment or shaft bent check for overall pump concentricity, remove and straighten bent shaft, consider replacing bent shaft 5. Vertical centrifugal inline pumps tailor made pump solutions. Cnlbx inline model cnvx vertical end suction model table of dimensions shows models with suction and discharge flanges alike. The shafts of the pump and drive unit must be closely aligned. Where flowserve has supplied only the bare shaft pump, the ex rating applies only to the pump. Tmea2skf laser shaft alignment alignment performed by. Dpas to which this declaration refers, are in accordance with the following standard. Method statement for installation and balancing of chilled. With spacer type couplings, a dial indicator should be used to obtain these readings.
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. When properly installed and when given reasonable care and maintenance, centrifugal pumps should operate satisfactorily for a long period of time. Repeat this procedure for the 3 to 9 oclock direction. The difference in a 15min alignment and an eighthour alignment is often correcting the soft foot. Additionally recommend strobe to combine ma chine rpm and belt speed to check for belt slip. Discharge pressure and flow required at the outlet of the pump as both the. Vertical condensate pump alignment the rigid or solid coupling makes taking meaningful alignment measurements virtually impossible. Models with discharge flange drilled one size smaller than suction flange are available. There are several steps which need to be taken for a successful alignment job. The performance curves given in the catalogue are valid for water whose density and viscosity are. Failure to achieve proper alignment, a condition referred to as misalignment, will result in increased pump vibration, decreased bearing life, and has the potential. Precision alignment with no manual input of data and no graphical or. When properly installed and when given reasonable care and maintenance, centrifugal pumps should operate satisfactorily for. Oct 01, 2012 the inclinometers in a laser alignment system work against gravity in the horizontal plane for a typical horizontal shaft alignment.
Laser alignment is an essential component of a viable maintenance. The ojt portion of a recent training class involved a large vertical floway pump driven by an 800 hp ge electric motor, rotating at 1200 rpm, utilizing a rigid coupling with a piloted fit. Steps to successful installation of vertical circulating water pumps following the correct procedures for pump and motor alignment is necessary for reliable operation. Pdf basic shaft alignment workbook for industrial rotatin. Keep this manual in a convenient location for quick reference. A new centrifugal pump has been devised to handle twophase flow. Another advantage of the vertical pump is that it saves valuable floor area and to some extent the pump is selfdraining one. Goulds vertical turbine pumps 3 goulds vertical turbine pumpsev v pump bowl assembly the bowl assembly is the heart of the vertical turbine pump. In isolation each strategy can help to reduce unexpected machine failure but taken together they form the hub.
The installation procedure for the vertical glandless pump varies depending upon the site conditions and applications. The procedure was to blend the liquids epoxy and hardener for 3 min and. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. It just depends on different features, some of them are. The inclinometers in a laser alignment system work against gravity in the horizontal plane for a typical horizontal shaft alignment. It is not necessary to relubricate this bearing except when the pump is to be torn down for maintenance and the bowl assembly is to be disassembled. It is an easy, costeffective part of your preventive maintenance program. Excessive bearing loading, leading to bearing failure in both the pump and motor. Fig 2 to check for angular alignment, insert a pair of inside calipers or taper gauge at four points at 90 degree intervals around the coupling. Machine alignment for maintenance personnel in drinking water and wastewater facilities. Basic shaft alignmenl workbook combining the side and top views f yjew. Vertical pump with outside sealed ball bearing and flexible coupling. Alignment employ laser or reverse dial indicator technology to align pump and motor. 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. As additional security, a flexible coupling is also employed. Here is the process for aligning a verticallymounted cfaced motor as shown on a vertical alignment demonstrator. The pipe should be targeted so as not to place strain on. Procedure for assembling skid install the flexible coupling to the pump shaft and bearing pedestal shaft align shafts to within.
444 1287 134 170 109 1462 339 664 344 1467 1087 686 1360 383 826 1547 990 232 1529 1361 1256 992 1429 656 110 1079 859 1276 128 423 598 1132 521