The alignment training is suitable for technicians undertaking machine alignment, coupling alignment, motor alignmnet, pump alignment, etc. Shaft alignment is a key factor in reducing vibrations and increasing reliability in rotating equipment. Shaft alignment training course ppt presentation and machine. Again, reverse alignment is the measurement of one axis to the relative position of an opposing axis. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your. Accuracy of dial indicator readings there is a quick way to check the validity of dial indicator. The sat3000 is a set of actual motor and pump assemblies used in the field and is designed to apply various technologies for machine alignment. Benefits, methods of proper pump to motor alignment.
The fire pump unit itself consists of a pump, a drive, a driver coupling. Engines, gearboxes and propeller shafts on ships are aligned using easylaser system. Alignment report hung seng huat engineering product co. Next, the pump shaft was centered in the stuffing box by monitoring radial travel with the rotalign pros actual coordinate values function. Special brackets are available accessories for alignment with locked rotors, which increases the safety for the operator.
The unit will be in angular alignment when the coupling faces are exactly the same distance apart at. An important understanding required is the confident use of dial gauges. Whether youre using a laser alignment system or dial indicators, one set of. If there is a difference from end to end, make it equal by shims. Step 4 precision alignment with a dial indicator youtube. Plot the measurement of the dial indicator 1 in line with point 1. Dial indicator alignment procedure the procedure for doing reverse dial indicator alignment is not a difficult one. One common use for plunger dial indicators is to measure the work of injection molding machines. Plunger dial indicator plunger dial indicator also have a clocklike face but are characterized by the plungers mounted on one of their sides. The tir is what a dial indicator will read initially as the offset between two shafts at any given point.
If you were to attempt to align the motor to the pump shaft, rather than the stuffing box, you need to account for the clearane in the pump bushings. A practical guide to shaft alignment plant services. Vemc presents pump motor alignment process with help of dial gauge method for accurate and smooth functioning of machines in your manufacturing units. Always use calibrated dial gauges adjust the plunger of the dial gauges so that they are pressed half ways ensure that uniform conventions i. Pros very accurate, far more accurate than the straight edge method. Install pump and driver onto baseplate after installing appropriate coupling halves on pump and driver shafts. For shaft alignment, we typically use dial indicators with 0. A dial indicator would be used when more accuracy is required or desired. Photograph 1 shows a dial indicator in the standard orientation. Laser alignment can be ten times faster and 100 percent more accurate. Under the indicator position mark the point that is 12 the indicator reading.
Dial indicators are measuring devices designed expressly to measure relative position. Dec 17, 2011 for a large 1,200 rpm pump with an elastomerinshear coupling, alignment with a straight edge and feeler gauge to precision of 0. Step 1 familiarize with terms, techniques and procedure. Reverse alignmentunderstanding centerline measurement by c. Benefits, methods of proper pump to motor alignment waterworld. I would install a temporary dummy bushing to hold the shaft on center and then use the dial indicator to sweep the pump shaft. Alignment of shafting requires measurement of small changes in distance dimensions. Jul, 2016 dial indicators a dial indicator measures very small changes in distance. Dec 17, 2011 use the measurements from the feeler gauge to build the shim pack. How to do the alignment for vertical pumps with motor. Dial indicator is mounted on one hub shaft and measures on rim of.
Dec 01, 2002 shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. The driver, or machine being moved, is lifted and shifted using shims and dial indicators until specified. A rough alignment is necessary due to the range limitations of the dial indicators. Shaft alignment training course ppt presentation and.
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. This occurs when using a twopole motor 3,500 to 3,600 rpm. Dial gauge alignment procedure in covered with detailed animation. The readings are then plugged into mathematical formulas to calculate shim requirements for proper alignment. When the alignment is correct, the foundation bolts should be tightened evenly but not too. Acceptable alignment has been attained when fim full indicator movement is less than or equal. Couplingshaft alignment trainer handson industrial skills. Dial indicators a dial indicator measures very small changes in distance. Simple and more accurate method is use of dial gages. Shaft alignment and couplings, model 46100 labvolt.
Dial indicator alignment basics alignment knowledge. The indicator must be rigidly located so the specified alignment values can be measured. The shafts are collinear at 12 the total indicator reading. Angular alignment check is made by inserting a taper gauge or feelers between the coupling faces at 90degree intervals around the coupling. This includes total indicator reading, the validity rule, and true position sensing. Top 12 reasons for using laser alignment easylaser. With each element having adjustment capabilities to create unique alignment problems, this learning system offers a complete training experience in this fundamental. Then, check the height of pump shaft with the height gauge. The dial indicators come from the manufacturer precalibrated, and must be rechecked on a regular schedule.
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. These concepts are very useful for easy alignment of a shaft during machining processes. Number what is shaft alignment 6 a definition 6 machine catenary 7 operation above critical speed 8 expressing alignment 10 alignment parameters 10 angularity, gap and offset 11 short flexible couplings 14 spacer shafts 15 how precise should alignment be. So a coupling alignment offset measurement reverse dial indicator or laser system of 0. Pdf dial indicator alignment procedure hussain vasadwala. A dial indicator is an instrument with either jeweled or plain bearings, precisely finished gears, pinions, and other precision parts designed to produce accurate measurements.
In this training, we will focus on two dial rimface alignment and how to accurately determine shaft positions using calculation and graphing procedures. Several equipment alignment methods, especially the reverse dial indicator method, which is the principle used in laser alignment is covered in explicit detail. You can pick the reference machine manually, or let the program choose one that will minimize the need for adjustments. The unit will be in angular alignment when the coupling faces are exactly the same distance apart at all points. Face reading readings obtained with a dial indicator as both shafts are rotated when the centerline of the dial indicator stem is set parallel to the shaft centerline. The plunger is a spring loaded part that can be depressed into the case causing the dial s needle to move clockwise. A dial indicator figure 9 can assist in determining alignment within 0. A popular method used for years and is still in use today is the rim and face method. A detailed coverage on this topic is provided using dial gauge animation with step by step procedure. Reverse dial indicator this method uses two indicators that check for radial runout and angularity. Installation and operation manual centrifugal pumps sections.
This measurement will be made by using dial indicators that measure in 0. Complete a handson rough alignment using straight edge techniques. Machine train for alignment of machine trains with three machines. Sometimes by using the feeler gages alignments are also carried out. A video describing how to correctly use and read a dial indicator during shaft alignment. The plunger is a spring loaded part that can be depressed into the case causing the dial. The primary parts of the dial indicator are the face or dial, case and plunger. How to do the alignment for vertical pumps with motor pump. Use of product other than as described in the manual may cause accident. Dial indicator principle, diagram, working, application. Figure 1 shows the best alignment that can expect from the three most prevalent alignment methods practiced in the industrial, worldwide. Shaft alignment training with dialing indicators alignment of the shaft alignment.
The intricate description explains the working of a dial gauge and gives an indepth understanding of taking and interpreting readings for dial gauge alignment. The mechanism which allows this type of dial indicator to work is a rack and pinion, which changes the linear thrust of the plunger into rotary motion. For reverse dial indicator setups with the indicator mounted at the flexplane, the flexplane angle is simply the offset indicated by the dial divided by the distance between the coupling faces. How to use preparation dial gauge must be securely mounted such as on a comparator stand or magnetic base. The graphical illustration of a single dial indicator sweep is. To measure vertical misalignment, perform the following steps. Video of shaft alignment using dial indicator dultmeier sales. Document asfound results using a format similar to that shown below. The couplingshaft alignment trainer is designed based on the dimensions of a common ansi centrifugal pump, and allows for training using all common alignment techniques and tools.
You will learn how to perform shaft alignment using the straightedge and feeler gauge, rim and face, reverse dial indicator, and laser optional. Use the micrometer to measure the thickness of the shim pack as most shims have a tolerance factor. Install two dial indicators radially against the top of the pump shaft, at ninety degrees to each other, lets say at 3 and 6 oclock. With the standard equipment and completely normal set up on the machine. The two 196b5 backplunger dial indicator gauges have three contact points and are graduated to 0. Put feeler gauges, vernier callipers and straight edges to good use to. Fire pump overview fire pump unit defined a fire pump is a device that provides the required water flow and pressure for a fire protection system. Do not use more than three to four shims under any foot. Use the feeler gauge to measure under each corner of the foot, paying attention for bent or cracked feet. This is a potential source of confusion for the uninitiated. If the pump or motor is damaged or leaking, electric shock, fire, explosion, liberation of toxic fumes, physical harm, or environmental damage may result. Easylaser is used to align generators and gearboxes in wind turbines of a number of sizes and makes.
Rotate the halves together, always matching the chalk mark. With different types of fixtures extended across the coupling, the shafts are rotated to. With the coupling broken, mount the fixture to the stationary shaft or coupling hub. To use a dial indicator, mount it on the coupler halves as shown in figure 2. There are several steps which need to be taken for a successful alignment job. Couplings must be of proper design and with adequate. The total travel all the way out to all the way in varies depending on the particular indicator model. This method produces acceptable results, but is less accurate than the reverse dial indicator method covered in this application note. Perform alignment of pump and driver shafts using dial indicators. Uncoupled, the pump shaft may not be in the center of the bushings. The manufacturers technical manual should be consulted to obtain this setting. The shaft alignment training course provides a highly practical knowledge of the use of dial gauge in coupling alignment.
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