It involves maintaining the prescribed distance a between the coupling halves see shaft coupling. Since then, our couplings have been widely accepted in japanese market under the bland name of formflex coupling. Make sure the probe of the dial indicators touch a smooth surface on the rim of the coupling hubs. There is no dispute between vibration and reliability trainers, practitioners and commentators that. Produce pdf reports directly from the display unit and save to usb memory. Shaft couplings are available in different sizes and material finishes. Load stress on formflex couplings is maintained at very low levels, except in special cases. The 350 kw, 1 440 rmin electric motor is driving the reducer with an output speed of 38 rmin. Less down time of replacement of cushions and rapid disconnection without disturbing existing alignment. Alignment couplers are designed to simplify alignment issues, resist vibrational loosening, and allow excellent freedom of movement. Basic shaft alignment workbook for industrial rotatin n1achincrv. Quality certificationquality certifications the pmi registered education provider logo is a registered mark of the project management institute, inc. The primary purpose of couplings is to join two pieces of rotating.
It is agreed a laser makes coupling alignment is so much easier and the most accurate method. This method can be used by inserting a feeler gauge and here are the steps listed below. Pdf basic shaft alignment workbook for industrial rotatin. For example, the only correct way to express shaft alignment tolerances is in terms of alignment conditions at the coupling. Rotating machinery is the heart of many industrial operations, but many engineers and technicians perform shaft alignment by guesswork or with limited knowledge of the tools and methods available to accurately and effectively align their machinery. Solid magnesium alloy permanent mold castings are heat treated and offer the highest strengthtoweight ratio available. Fixed spacer length type coupling helps to provide independent running requirement. Flexible couplings can accommodate some misalignment but should not be used as an excuse for poor alignment or lack of maintenance. Select a gear coupling to connect a 500 hp, 1170 rpm electric motor. However, the task of shaft allignment can be made easy by following a few guidelines. Flexible couplings an overview sciencedirect topics. Various alignment tool vendors and industry consultants had published tolerances for acceptable alignment of flexible couplings, but these varied among sources. First published in 1991, this useful text has been revised and reprinted in a more readable, updated format.
There are two families of couplings rigid and flexible. In power transmission, a coupling alignment is a device used to connect two or more machine shafts together for the purpose of transmitting power. For permanent couplings couplings that are insitu all the time, as opposed to clutches or nonpermanent couplings, there are two main groups based on the transfer element, with typical features listed as follows. Step beam couplings are electrically isolating and do not wind up.
After the feeler gauge is put, both couplings are rotated half way simultaneously. Festo didactic 3696520 v table of contents preface vii. To achieve this goal, components that are the most likely to fail must be made to operate within their acceptable design limits. Machinery alignment tolerance tables impact engineering. Generally there are two main types of misalignments. All pads are finished with rounded corners and supplied entirely in stainless steel. Good alignment practices include proper shimming, correct torque on hold. A coupling is a device used to connect two shafts together at their ends for the purpose of transmitting power.
Coupling design factors in many variables, such as horsepower, load, specific gravity, head pressure, torque, shaft sizes, safety factors etc. Pdf a laser shaft alignment by ipspsds for rotary machine. In those cases, bellows couplings with fully split clamping hubs are often used, since they can be installed aft er the shafts have been aligned. Avace mafactri office the importance of motor shaft alignment the objective of optimized shaft alignment is to increase the operating life span of rotating machinery. Elas tomeric couplings transfer element typically a rubber or urethane compound or a derivative. If, on the other hand, you update your knowledge of shaft alignment techniques and acceptable alignment tolerances, you might be on the way to becoming more reliabilityfocused. Alignment allowances can eliminate the need for expensive precision machining in rigidly mounted applications. If vibration is detected it could indicate there is an issue with alignment or other problems. Insert the feeler gauge between the coupling faces of the shafts. The electric motor rating is 50 hp at the base speed and the system peak torque at the coupling is estimated to be 150,000 lbin. Linear alignment couplers are available in 12 standard thread sizes. Accurate laser shaft alignment of the driver to the driven machine requires that the cardan shaft and its couplings be removed. Rotating machinery is the heart of many industrial operations, but many engineers and technicians perform shaft alignment by guesswork or with limited knowledge of the tools and methods available to accurately and effectively align.
The other advantage you can save the alignment results and down load a pdf report. This article describes what is a coupling, types of couplings, rigid couplings, flexible couplings, universal couplings, hookes coupling, pin bush coupling, flanged coupling etc. Misalignment shaft couplings misalignment shaft couplers. 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. Our zero backlash beam shaft couplings are offered in four options. Spiral beam couplings offer up to 7 degrees of angular offset and torques to 1240 inchlbs. The following document is intended for the explicit use of lovejoy customers to aid in the installation of lovejoy power transmission products. Pdf a practical guide to shaft alignment ahmad rohman.
Alignment and couplings 5 objectives in this job, you will align two shafts using the reverse indicator method. Maximum reliabilty for troublefree operation, long life and lower operating costs increased cylinder life by reducing wear on piston and rod bearings. Powershim alignment shims contribute to the safe practice of reducing worker injuries and cuts during installation. Additionally, shaft hubs include hub flats for ease of alignment. Angular misalignment an overview sciencedirect topics.
The most secure digital platform to get legally binding, electronically signed. Coupling alignment you must check the pumps flexible coupling alignment immediately and then again just before startup. The reducer low speed shaft diameter is 215 mm, the conveyor head shaft is 225 mm. Hrc, resilient couplings from 30 to 3,150nm, available in taper lock and pilot bore variants jaw couplings from 0. Describe the types of misalignment in motor couplings. Fill out, securely sign, print or email your pump alignment form instantly with signnow. Maximum reliability for troublefree operation, long life and lower operating costs increased cylinder life by reducing wear on piston and rod bearings. An alignment medium for measuring residual dipolar couplings. Shaft alignment is one of the major problems related to machinery with shaft coupling. Pdf laseroptical alignment of shafts in rotating machinery is simple and more accurate than conventional mechanical methods and can.
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. This could point to problems related to the motor, coupling, or driven operation. The caliperstraightedge alignment procedure is described below. Improper alignment results in excessive vibration, short life of driven equipment compound bearing and coupling clutch parts, and frequent re alignment. Step 4 precision alignment with a dial indicator youtube. How to use this manual this manual provides detailed instructions on installation, maintenance and parts identification for falk lifelign gear couplings, types g20, g32, and g52. This could point to problems related to the motor, coupling. Residual dipolar couplings rdcs have attracted attention in light of their great impact on the structural elucidation of organic molecules. Coupling alignment is essential to ensure the troublefree mechanical operation of a pump set and to avoid damage to the transmission elements. Couplings must be of proper design and with adequate. The skf tksa 11 is an innovative shaft alignment tool that uses smartphones and tablets and intuitively guides the user through the shaft alignment process. As an example, a machine with a short flexible coupling running at 1800. Equipment required c universal base assembly, model 46603 c motor package, model 46609 c couplings shafts panel, model 46610 c pillow block bearings panel, model 46611 c alignment and couplings. Rigid taper lock couplings in 8 sizes up to 10,500nm section 5.
A shaft coupling is a mechanical device used to connect rotating shafts and absorb misalignments between them. Between two shafts and occurs at the coupling between the generator and turbine. Shaft alignment training course ppt presentation and. They should be used only if no other tolerances are prescribed by existing inhouse standards. Read the article to know more about shaft alignment. How to do the alignment of shafts, compressors and. F12 tb woods 8888296637 p1686tbw 1219 table of contents sureflex plus couplings utilize epdm, neoprene, and hytrel flexible elastomer sleeves to transmit torque and. Jaw couplings lline l, al, ss, c, h installation guide 1. A simple and effective procedure for doing shaft alignment of rotating machinery. Couplings and shaft alignment provides positive practical guidance to engineers dealing with shaft couplings for the transmission of power, and concerned with the related problem of shaft alignment.
Install the appropriate coupling guard per osha supply. Gear couplings are normally grease lubricated and must maintain their internal lubrication. Machinery manufacturers published various shaft alignment guides for their specific machines, but these varied widely in methodology and acceptable tolerances. The proper alignment of a vertical shaft hydrounit is critical to trouble free. These can be clamped straight to the cylinder rod, offering a superior strength connection. Although omega couplings can withstand gross misalignment, care should be taken for best possible alignment to assure optimum performance. Easy mounting and dismounting couplings can be mounted and unmounted quickly and easily due.
Vibraligns recommended shaft alignment tolerances are based on acceptable tolerances used by industry and should be used in place of coupling tolerances when no alignment. A practical guide to shaft alignment plant services. Basic shaft alignment workbook preface w elcome to the introductory book on shaft alignment of rotating machinery. 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. The readings on the feeler gauge are checked at four points on the shaft coupling. The book is reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. Select a coupling for reversing service to connect a gear drive lowspeed shaft to a runout mill table roll. This shaft alignment video presents the most basic concepts of alignment.
In cases where precision shaft alignment is simply not practical, special. Misalignment of flexible couplings can lead to excessive force on either the motor or the driven load. When initial align ment is incorrect and the coupling is heavily stressed due to torque or other forces, it will have little. It is therefore necessary for a marine engineer to have thorough knowledge about shaft alignment methods, techniques and concept. Understand the difference between aligning couplings and aligning shafts. While accurately aligned at the factory, this alignment may shift or twist during shipment. It features a dropout center assembly for easy equipment maintenance. If a manufacturer of a machine or coupling require tighter alignment. The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment. The ships engine room is full of such rotating equipment such as pumps, generators and so forth. The procedure for doing reverse dial indicator alignment is not a difficult one. Installation and maintenance instructions atraflex. Pump alignment form fill out and sign printable pdf. The information may be considered privileged and should.
Misalignment for gear couplings needs to be minimized by not exceeding the manufacturers recommendations for installation limits for the gap to hub separation, angular alignment, and parallel offset alignment measurements. Industrial maintenance alignment and couplings, model 46101. Actuator accessories actuator products linear alignment 4tk series prl series linear alignment couplers are available in 12 standard thread sizes. Dec 01, 2002 shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Alignment couplers help reduce binding and simplify field alignment problems, enhancing cylinder performance and reducing seal and bearing wear. Vibraligns recommended shaft alignment tolerances are based on acceptable tolerances used by industry and should be used in place of coupling tolerances when no alignment tolerance is specified by a companys engineering or reliability department. When the shaft of two rotator machines are directly coupled via a flexible coupling, any misalignment between their centerlines of rotation can result in vibration. Gear coupling selection procedure table 1 torque and horsepower ratings standard selection method the standard selection method can be used for most motor. 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. Therefore, the service life of these couplings is practically unlimited when operated within the acceptable range of allowable misalignment. Select a coupling to connect the low speed shaft of an ore conveyor drive to a speed reducer. The objective of optimized shaft alignment is to increase the operating life span of rotating machinery.
Learn more here about the cost, thrust capacity and sizes of rod end couplings by gagne inc. Condition monitoring, machinery diagnostics, shaft and belt alignment. There are several steps which need to be taken for a successful alignment job. Servobeam can operate at up to 10,000 rpm, up to 7 degrees angular compensation and with torques up to 300 inlbs. Alignmentinsensitive coupling for plcbased surface mount photonics article pdf available in ieee photonics technology letters 161. The suggested tolerances shown on the following pages are general values based upon over 20 years of shaft alignment experience at. The primary purpose of couplings is to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. Magnaloyproductscatalog northamericasfavoritesourcefor.
Jul 10, 2017 the major topics that will be covered include. Feb 04, 20 shaft alignment of rotating equipment is an essential part of machinery maintenance. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. Couplings are mechanical elements that couples two drive elements which enables motion to be transferred from one element to another. This procedure, the four easy steps to good shaft alignmentis simple. Pdf alignmentinsensitive coupling for plcbased surface. Misalignment will severely shorten the lifespan of your coupling. Foundations, base plates, installation, and piping strain. The importance of motor shaft alignment department of energy. Couplings can be rigid or flexible depending on the alignment. To achieve this goal, components that are the most likely.