Start a free trial now to save yourself time and money. Under the indicator position mark the point that is 12 the indicator reading. The motor is the prime mover, transferring power to the pump by. Achieving proper alignment, however, involves much more than merely adjustment the machines so that the shafts are coaxial. Close coupling is the preferred method of joining pump and motor as it allows a motor to be directly mounted onto a pump. The main purpose of shaft alignment is to make sure that the center line of the motor rotor shaft coincides with the center line of the driven machinery i. Jun 12, 2010 learn from the very simple sets of pump and motor, the model made out of papers. 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. Alignment accuracy is critical to pump and driver longevity as stated above, and generally the better the alignment the longer the pump and driver bearing life. Use this stepbystep guide to fill out the pump alignment form swiftly and with ideal precision. A typical pump in an hvac application requires a fourpole motor 1,750 to 1,800 rpm, depending on slip.
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. A motor with a starting temperature of 70 f is perfectly aligned to the pump shaft it will be driving. The motor is the prime mover, transferring power to the pump by the use of a coupling. If the front foot of the motor is left 2 mils high and the back feet are left 2 mils low, the shaft alignment results will be as follows. A millwrights guide to motor pump alignment by tommy b. Machine vibration, bearing damage, premature seal wear, and coupling damage are all examples of issues pumps experience if improperly aligned at installation. Longcoupled pumps have separate pump and motor shafts that are connected through a coupler. Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability. The shafts of the pump and drive unit must be closely aligned. 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. Vibralign is committed to helping businesses use their resources more efficiently and effectively.
A millwrights guide to motor pump alignment, second edition is the result of over 38 years of hard work and many thousands of hours writing, testing, retesting, and testing again the alignment related formulas the author developed on his own. Again, this information would be drawn from the motor manufacturer, who has done extensive testing to determine motor performance. The alignment of the pump flanges to the connecting piping is called flange alignment. Aligning vertical pumps empowering pumps and equipment. The alignment of the pump shaft to the drive shaft of the motor, gear, or engine driving the pump is called shaft alignment. He is a member of asme, the vibration institute, and the pacific energy association. Motorthe engineer would size the motor based on the amount of horsepower required to do the work that the pump is called to do. For appropriate applications, the time, expertise and instruments needed to achieve precision alignment tolerances of less than 0. Tmea2skf laser shaft alignment alignment performed by. Dec 17, 2011 proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability. A millwrights guide to motor pump alignment 1st edition by tom harlon author 3. Figure 1 shows the best alignment that can expect from the three most prevalent alignment methods practiced in the industrial, worldwide. Dec 01, 2002 if the front foot of the motor is left 2 mils high and the back feet are left 2 mils low, the shaft alignment results will be as follows. Up to 4 different measurement methods makes it possible to perform shaft alignment in any conditions.
Its purpose is to convert energy of prime mover an electric motor or turbine first into velocity or kinetic energy and then into pressure energy of a fluid that is being pumped. Richard massey president aline manufacturing company, incorporated laporte, texas and alastair j. If a manufacturer of a machine or coupling require tighter alignment tolerances, those should be used. Learn from the very simple sets of pump and motor, the model made out of papers. The adapter solves the problem of there is no time to do an alignment. It is sure to be valuable to novices and professionals alike. 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.
Abstract shaft alignment is a key factor in reducing vibrations and. For maintenance personnel in drinking water and wastewater. The way to complete the online pump alignment form on the internet. A modern shaft alignment system can measure all the above types of machine. Shaft alignment training course ppt presentation and machine.
Here you can download the pdf template of the tksa 20 shaft alignment report, which can be used for documenting of your alignment activities. If your motor does not have a c or d end bell, one can be installed when the motor is rewound. Close coupling also provides a compact unit that is often less expensive than an equivalent long coupled assembly. Precision alignment ensures the smooth, efficient transmission of power from the motor to the driven machine. The book is reference material on rotating machinery basics, pump overhaul, mechanical seals, basic vibration, and shaft alignment. It is very important that the pumpmotor alignment is carried out correctly.
Draft tolerance, and that the axial shatt separation is within tolerance. Campbell senior alignment specialist bently nevada corporation houston, texas c. These indicator readings mean that you need to move the motor. Soft foot check and correct as required see following pages. Next, install the coupling to the driven equipment. For this exercise, the temperature of the pump will not change. Therefore, less accurate methods can be used at slower shaft speed. Proper alignment is the largest factor in determining the life of bearings, seals and couplings. Proper alignment of rotating equipment has a long been recognized as a prerequisite to safe, reliable operation. 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.
Once the pump set has been properly installed, the final alignment can be checked and, if necessary, corrected. The main difference in aligning a vertical cface pump and traditional alignment is this. For maintenance personnel in drinking water and wastewater facilities. A millwrights guide to motor pump alignment, second edition is the result of over 38 years of hard work and many thousands of hours writing, testing, retesting, and testing again the alignmentrelated formulas the author developed on his own. This is probably the most common configuration of coupled machines in industry. Up to about thirtyhorse power 22 kw you hang the motor on the pump.
Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. 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. Obviously realignment is needed whenever the pump or motor are moved or replaced. Motorpump alignment is the process of aligning shaft centerlines between a motor and a pump. The advanced tools of the editor will direct you through the editable pdf. This section shows the recommended preliminary cold settings for electric motordriven pumps.
Produce pdf reports directly from the display unit and. Above thirtyhorse power 22 kw you hang the pump on the motor. The motor should then be moved into proper alignment and joined to the coupling. Pdf basic shaft alignment workbook for industrial rotatin. A practical guide to pulley alignment plant services. Misalignment in pumps possible causes and solutions.
Hence, this technique offers precise alignment and secure hold. Reverse alignmentunderstanding centerline measurement by c. Installation, operation, and maintenance manual goulds pumps. Improper alignment results in excessive vibration, short life of driven equipment compound bearing and. Eugene vogel has worked in the machinery repair industry for more than 30 years, specializing in vibration analysis of rotating equipment. 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. Benefits, methods of proper pump to motor alignment. The most secure digital platform to get legally binding, electronically signed documents in just a few seconds. Alignment is important, but we can get away with the least accurate method. This will show you how much you need to move the motor for horizontal alignment.
Shaft misalignment is responsible for as much as 50 percent of all costs related to rotating machinery breakdowns. At todays energy prices, those savings can be significant. The proper shaft alignment procedure is to secure the driven equipment first because moving a pump, for example, would stress the connecting piping. The alignment training is suitable for technicians undertaking machine alignment, coupling. Machinery alignment tolerance tables impact engineering. Motor efficiency in a precisely aligned machine increases. Compressor engineering corporation in the optical alignment field, until the formation in i985 of bently nevada alignment service corporation. Increased motor efficiency equals less power equals lower energy bills for your facility.
A millwrights guide to motor pump alignment and millions of other books are available for amazon kindle. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. 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. You make calculations to see how far the driver must be moved to align the centerline of the pump to the. Since the motor uses a cface flange, the motor is bolting axially into the flange. So to position the motor for proper shaft alignment, these two methods must be utilized. A quick check revealed misalignment of the pump and motor, causing excessive noise and premature bearing wear.
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