This course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools. Benefits, methods of proper pump to motor alignment. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. Alignment of the shaft is necessary when the motor or driven machinery is new or when it is dismantled due to improper running.
With a loadonpad design, figure 1 the shaft is free to laterally within bearing clearance, and alignment data is difficult to obtain without temporary bearing shims to stabilize the sham with a loadbetweenpad design, figure 1 b, the shaft remains stable during the alignment procedure. Using your own dial indicators, dial indicator we use is a ls starrett, 81141j. Stan shows you how to perform an alignment in just one or two moves using dial indicators and the vertizontal compound. The intricate description explains the working of a dial gauge and gives an indepth understanding of taking and interpreting readings for dial gauge alignment. Step 4 precision alignment with a dial indicator youtube. In this training, we will focus on two dial rimface alignment and how to accurately determine shaft positions using calculation and graphing procedures. Pipe strain, and its effect on shaft alignment empowering. Apr, 2014 shaft alignment training with vibralign professional trainer stan riddle. Alignment is important, but we can get away with the least accurate method. If there is a difference from end to end, make it equal by shims. The starrett s668cz shaft alignment clamp set includes two chain clamps, two 196b5 backplunger dial indicator gauges, two pt18724 snugs, two extension plates, and various posts to perform radial and angular alignment of motors, pumps, and compressors. Z to the current z shown in the software and type it in as the new position. This method produces acceptable results, but is less accurate than the reverse dial indicator method covered in this application note.
With the help of dial, mounted on a vertical stand generally refered as height gauge pick up the height of axis line of the motor. Where rim to ace must be used check to see that you have a good indicator track. Rotate both shafts by about 90 degrees, keeping the marks close to each other. Dial indicator principle, diagram, working, application. Facerim method two indicator method three indicator method reverse indicator method. When using dial indicators use reverse indicator method whenever possible to improve accuracy. The motor is the prime mover, transferring power to the pump by the use of a coupling. It is not intended as a comprehensive guide to alignment of process machinery, nor is it a substitute for seeking professional advice or. Shaft alignment training course ppt presentation and. Pdf a laser shaft alignment by ipspsds for rotary machine. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment. 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. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail.
Reliable trouble free and efficient operation of a unit depends upon correct alignment. Dial gauge alignment procedure in covered with detailed animation. When using this form, you may find it convenient to use mils instead of thousandths of an inch. At this diameter the maximum allowable gap would be. Shaft alignment industrial wiki odesie by tech transfer. These lever type dial test indicators are especially intended for use on the shop floor or in the quality inspection room. 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. Precision shaft alignment using dial indicators abstract even with the advent of new computerized dial indicator and laser alignment systems, knowledge of the basics of shaft alignment is a must.
Its flexible components are intended to cater for different shaft dimensions and coupling configurations. We made a minor vertical correction to the inboard end of the pump 10 mils, and aligned the motor back to the pump. Jul 26, 2014 alignment procedure taking alignment readings step no. If the preceding work has been done well this final stage should be free of difficulties and. With the motor and pump shaft flanges close to each other, but disconnected, mark a spot on each shaft, then measure the separation between them with a feeler or taper gauge. Combo beltsheave red laser la12000r and reverse dial indicator system. Figure 5 coupling alignment using dial indicator operating, installation, and maintenance rules for safe installation continued alingment procedurescontinued 1. This is probably the most common configuration of coupled machines in industry.
Ritec alignment kit is a powerful tool to adjust shafts alignment using dial indicators accurately and easily. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. Alignment report hung seng huat engineering product co. The pump unit has been manufactured to allow field alignment. The capital cost outlay for a laser system versus a set. Dec 01, 2002 shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Those who purchase new alignment instruments and hand them out to field technicians who lack the knowledge of alignment fundamentals are often. Maximize the sweep distance of the face dial indicator for the geometry of the machine being aligned. Dial indicator alignment basics alignment knowledge. 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. Figure 1 shows the best alignment that can expect from the three most prevalent alignment methods practiced in the industrial, worldwide. A detailed coverage on this topic is provided using dial gauge animation with step by step procedure.
Misalignment may be the cause of noisy pump operation, vibration, premature bearing failure, or excessive coupling wear. Improper alignment leads to increase of stresses in the shafts and thus on the equipment, which might result in break down of the machine. Motorpump alignment is the process of aligning shaft centerlines between a motor and a pump. When a driver like an electric motor or a turbine is coupled to a pump, generator, or any other piece of equipment, it is essential that the shafts of the two pieces are aligned. The plunger is a spring loaded part that can be depressed into. How to properly use a dial indicator machiningtutorial. Calculate the vertical misalignment v m for each dial indicator using the following formulas. Sometimes by using the feeler gages alignments are also carried out. This 2day course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools.
The plunger is a spring loaded part that can be depressed into the case causing the dial to move clockwise. Shaft alignment training with vibralign professional trainer stan riddle. Instruction manual thank you for purchasing the niigata seiki dial gauge. The tksa 31 is skfs most affordable solution for easy laser shaft alignment. Therefore, less accurate methods can be used at slower shaft speed. Make sure that you always view the pump from the same direction in order for you to keep the left and right directions correct. Shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Shaft misalignment is responsible for as much as 50 percent of all costs related to rotating machinery breakdowns. A rough alignment is necessary due to the range limitations of the dial indicators. For those not doing shaft alignment at all, for the longevity and reliability of your equipment, we highly recommend that you start now. 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.
Moreover, as the name suggests, 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. As mentioned earlier, the reverse dial indicator method of alignment is probably the most popular method of measurement, because the dial indicators are installed to measure the relative position of two shaft centerlines. Alignment is accomplished either through shimming andor. Shaft alignment training course ppt presentation and machine. Ppt alignment powerpoint presentation free to download. Use a straight edge to get the equipment fairly close before going to dial indicators. Shaft laser alignment 3 benefits over dial indicators. Used with a magnetic base or indicator stand, this gauge will show the difference in position from a zero point set at a reference position. With different types of fixtures extended across the coupling, the shafts are rotated to. Shaft alignment is a method or procedure by which shafts of machines such as motors and turbines are connected to a generator or pump in proper alignment. Oct 21, 2016 vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. A typical pump in an hvac application requires a fourpole motor 1,750 to 1,800 rpm, depending on slip. It is an absolute requirement for machinery before the machinery is put in service. For example, a machine running at 1800 rpm with 12 inch of spacer shaft length would allow a maximum offset of.
Then, check the height of pump shaft with the height gauge. Shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin. The skf tksa 11 is the first instrument on the market that uses inductive proximity sensors, enabling accurate and reliable shaft alignment to. Simple and more accurate method is use of dial gages. Figure 46 shows the calculation using the cross dial alignment form. Alignment 1 alignment 2 1 introduction 3 what is shaft alignment it is collinear of two center lines shaft alignment is the proper positioning of the shaft centerlines of the driver and driven components i. Shaft alignment by dial test indicator dti horizontal alignment parallel shaft alignment by dial test indicator dti vertical alignment angular pump motor the indicators are zeroed on the top and read at the bottom record the indicator reading and consider the sag compensation by subtracting it from the recorded reading move the motor to. Check axial clearance of coupling at every 90 increment. The use of dial indicators for the vast majority of shaft alignment tasks where a. If the face dial contacts the coupling face directly, ensure the plunger of indicator contacts the coupling near its outer edge. The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment, etc. Shaft alignment methods explained bright hub engineering. May, 2016 join our email blast for more free stuff.
Dial indicators are measuring devices designed expressly to measure relative position. We went back to the laser alignment tool, and the transmitterdetectors were completely still. How to properly use the dial gauge to determine zposition. 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. Ensure fixtures are mounted at a position where rotation is possible. The horizontal move is the part of the alignment process that aligns the shafts centerlines from side to side. Whether youre using a laser alignment system or dial indicators, one set of. Working of dial indicator it operates on the principle, that a very slight upward pressure on the. A precision alignment will only be achieved with dial indicators or laser. An important understanding required is the confident use of dial gauges. Measurements were made, and it was determined that the motor was base bound, or too high to be aligned to the pump.
Pdf basic shaft alignment workbook for industrial rotatin. The unit must be properly aligned at the time of installation. Shaft alignment training with vibralign professional trainer stan. The dial test indicator is a high quality precision measuring instrument designed to provide a long life if given proper care and use. 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. The skf tksa 11 is the first instrument on the market that uses inductive proximity sensors, enabling accurate and reliable shaft alignment to be affordable for every budget. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your. Check for indicator sag before mounting the hardware. View the machine from the pump end, zero the indicators on the left, and then rotate and read on the right. This paper is written by a laser alignment iconoclast. A practical guide to shaft alignment plant services.
Produce pdf reports directly from the display unit and save to usb. This allows the use of whole numbers and avoids confusing decimals. There are many reasons why dial indicators are a viable option to measure alignment. For those currently using dial indicators without the budget to throw down on a laser alignment system, the free lovejoy dials app will help provide some of the automated calculation benefits of using laser tool. Pdf laseroptical alignment of shafts in rotating machinery is simple and more accurate than conventional mechanical methods and can result. Dial indicator is a very important comparator used in mechanical industrial measurement applications. Using a square grid graph paper to illustrate the position. Set the rim dial indicator to the positive sag value. This easy way to perform alignments with dials can be even easier if you let the free. Dec 22, 2014 for those currently using dial indicators without the budget to throw down on a laser alignment system, the free lovejoy dials app will help provide some of the automated calculation benefits of using laser tool.
A popular method used for years and is still in use today is the rim and face method. Notice the minus sign in the calculation of the vm, indicator 1. Machine type pump motor vertical angle horizontal angle horizontal offset thermal compensation stationary s machine movable m machine vertical offset offset 2. Under the indicator position mark the point that is half the indicator reading.
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