Page 6 manual cardan shaft fixture p0208gb alignment procedure preparations. Typical alignment tolerances are summarized in table 1. Shafts are breaking or cracking at or close to the inboard bearings or coupling hubs. Combine laser and computer software technology with your handson skills to help with shaft alignment. Faulkner columbus division, battelle memorial institute and department of mechanical engineering the ohio state university columbus, ohio 1. Cardan shaft s without length compensati on have a constant length l1 corresponding to the working length. Highend systems for shaft alignment and geometric measurements. Fasteners are a critical component of the precision shaft alignment process, yet the importance of fasteners is many times overlooked. Shaft alignment report measurement program horizontal operator user measurement unit mils temperature 80. These changes in the shaft alignment can be accommodated in a few different ways. The thermal growth compensation function allows the measurement system to calculate the correct shims and adjustment values even in such cases. The length of the motor shaft between its bearings is the resistance arm. Those systems are used to align generator and gear boxes in wind turbines, propellers pumps ecc ecc.
It is an absolute requirement for machinery before the machinery is put in service. Continuing education units ceus and contact hours upon completion of this training program, the attendee will receive a certificate of completion with 8. Mar 03, 2014 the driven shaft to rotate unevenly during operation, which results in increased vibration. The dummy axle was angled 140 and the intermediate shaft was aligned with the dummy shaft. Rotalign touch advanced laser shaft alignment system. Tmea2skf laser shaft alignment alignment performed by. Shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications. Shaft alignment a proper alignment of engines gear box and utility increase the life time and efficiency of the machine.
Introduction the main propulsion shaft line is the essential part of a modern ship propulsion system, exposed to various conditions throughout the ships lifetime. The dummy shaft was lined up with the gearbox input shaft. Skf laser alignment system shaft alignment tool tksa 41. Skf is launching two new shaft alignment tools, tksa 20 and tksa 40, which are highquality, userfriendly instruments that enable users to accurately align shafts by means of laser beams.
On completion of training on the four easy steps to good shaft. Apr 21, 2017 there is another side to the alignment story. By helping industries worldwide to become perfectly aligned, and eliminating anything that might not be, we minimize unnecessary wear and production stoppages. Dec 01, 2002 shaft alignment tolerances historically, shaft alignment tolerances have been governed by the coupling manufacturers design specifications.
Jan 22, 2014 while at facilities across the country i noticed a lack of understanding regarding the need for precision alignment of offset shaft driven rotating equipment. Cardan shaft alignment simplified using latest laser. Sea trials showed that the alignment was very successful. Thanks to flexible brackets you can install the equipment in the most appropriate place.
The measurement principle the sweep measurement mode concurrent live move. Care has been taken by the authors, pruftechnik ltd, in the preparation of this publication. Shaft alignment has never been easier, quicker and more affordable accurate shaft alignment helps you. Rotalign touch is the first laser shaft alignment system on the market to combine high precision onsite measuring tasks and cloud connectivity for worldwide data access and transfer. Cardan shaft alignment ujoint rotalign system reverse mounted may 1, 2007 by norm voelzow. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools. Alignment supplies introduces new shaft alignment system. The laser is mounted on a rotating frame which simulates the centerline of the non. The rotalign ultra and the optalign smart both feature superior single beam sensor technology that allow uncoupled measurements to be taken accurately. Shaft alignment handbook, third edition, crc press, 2006. Ive drawn a cross on each yoke so you can see clearly that they are indeed in alignment. The easylaser system is very intuitive and reliable and guarantee precise and quick on site alignment.
Depending on the shaft configuration, one of the two available methods can be used. Shaft alignment is the process of aligning two or more shafts with each other to within a tolerated margin. Shaft line alignment and lateral vibration analysis are especially sensitive to proper boundary conditions determination. Machine alignment for maintenance personnel in drinking water and wastewater facilities. The vblock mounting clamps are 78 wide and supplied with chain to accommodate shafts from. Do not run a w arrangement in plan and a z arrangement in elevation or vice versa at the same time on one shaft. While at facilities across the country i noticed a lack of understanding regarding the need for precision alignment of offset shaft driven rotating equipment. Installation of electric motors and repair of fans are performed easier and faster if you also use the calibration steel shims baltech23458n series.
Driving and driven shaft centerlines are parallel to each other driving and driven shaft centerlines intersect in both cases. Clean, dress up and file any burrs from mounting faces and anchor bolt. The product possesses a high resolution color backlit tft screen, file storage capacity of up to 200 measurement files, and an alignment condition led that gives. Now, to my astonishment my front drive shaft is set up exactly the opposite. Mechanical engineering a series of textbooks and reference books founding editor l. Alignment in gearing i by geometer shafts driven one from another by gearing may be disposed parallel, at an angle or cross wiseaccording to the type of gearing employedand satisfactory operation can often depend as much on alignment of the gears on the shafts, as on the spacing of these or on precision in the gear teeth profiles. Training classes back to all classes reliable precision maintenance date.
Continuing education units ceus and contact hours upon completion of this training program, the attendee will receive a certificate of completion with 8 contact hours. For maintenance personnel in drinking water and wastewater. To achieve this goal, components that are the most likely. The motor shaft is 60mm diameter and the screen shaft is 55mm diameter. Shaft alignment has in recent years become more of a challenge due to increased power, lower shaft speeds and heavier propellers in combination with a shorter propulsion shaft. The shaft alignment store accepts orders and ships to usa based customers only. A machine properly aligned will be a reliable asset to the plant, it will be there when it is needed and will require less scheduled and unscheduled maintenance. Correctly aligned and regularly controlled machines significantly reduce operating and maintenance costs.
Grc phase 3 focused on identifying any abnormal loading on the gear, shaft. Standard industry norms for alignment tolerances are cited in table 1. A proper alignment of engines gear box and utility increase the life time and efficiency of the machine. My back shaft is easy to photograph and it conforms to what the magazine refers to as having the yokes in the same plane. Live view supports intuitive measurements and facilitates horizontal and vertical alignments. 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. The minimum swing radius when mounted on a 1 shaft is 538. Fixturlaser shaft alignment instruments are custom made with firmware features that ensure high measurement accuracy and with mounting hardware that is ideally suited for optimal alignment of the gearbox and generator shafts in wind turbines. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in. Intelligent cardan shaft alignment alignment solutions for all types of cardan shafts with specially designed brackets and new measuring methods, the rotalign ultra is platform allows cardan shafts to be aligned without removing the shaft. The objective of shaft alignment is to minimize coupling forces by making two rotational axes form a single line while the machine operates. Then, through the use of a laseralignment system and a specially constructed cardan offset bracket, the angle between the machines can be easily determined and corrected. Reducing energy consumption and avoiding machine breakdowns are important goals, says benjamin provoost, development engineer, skf maintenance products. An offset shaft, or cardan shaft as it is typically called,is a drive shaft, with ujoints, used to transfer power from a motor driver to a piece of equipment driven.
Understanding the need for offset shaft alignment vibralign. Vibration wear energy usage proper alignment increases reliability. In practice, proper alignment is difficult to achieve without using alignment equipment such as dial indicators or laser alignment tools to check and correct for misalignment. Shaft lines with pointwise, ideal stiff models of journal bearings are common. Designed to clamp to shaft and reach over coupling.
With the bracket installed, a simple shaft alignment occurs using an uncoupled measurement mode as laser and receiver are both turned independently of each other to take measurements. These changes in the shaft alignment can be accommodated in a. The accelerometer, mounted on bearing 1 is required to measure the acceleration. The ins and outs of engine and shaft alignment part i from the. Jul 26, 2014 alignment procedure taking alignment readings step no. Conventional methods for shaft alignment, such as straightedge, thickness gage or dial gage, are very time consuming. It features the unique sensalign 7 laser and sensor heads offering a full range of everyday alignment routines up to expert degree alignment jobs such as cardan shaft alignment or coupling alignment. Monitor the machine corrections concurrently in both horizontal and verti cal directions with laser and sensor mounted at any angular position on the shaft. Proper shaft alignment is especially critical when the motor is operated at high speeds. Shaft line alignment analysis taking ship construction. Increase bearing life reduce stress on couplings and thereby the risk of overheating and breakage reduce wear on seals, helping to prevent contamination and lubricant leakage reduce friction and thereby energy consumption reduce vibration.
Accurate laser shaft alignment of the driver to the driven machine requires that the cardan shaft and its couplings be removed. With additional chain it can be mounted on shafts over 10. Offset denotes that the shafts of the driver and driven elements are not inline with each other. 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. The alisensor shaftlaser features a 3d layout with live alignment diagrams and graduated tolerance control to show both acceptable and excellent tolerances. Shaft alignment has never been easier, quicker and more. Fixturlaser is a global player and leader in developing innovative, userfriendly equipment for shaft alignment.
This is a fully automated set for shaft alignment of horizontal and vertical machines. I myself have seen electricians and mechanics alike becoming frustrated trying to determine the cause of speed fluctuations and vibration in offset shaft driven equipment. The engine was aligned with the intermediate shaft. 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. In nauticus machinery shaft alignment these effects can be carefully considered when designing an optimal shaft line in order to avoid problems in operation. Length defi niti on the working length ebl of your cardan shaft defi nes the distance between the drive and output units and the values of changes in length occurring during operati on or at standsti ll. Fluke 830 laser alignment tool manual pdf instrumart. The ins and outs of shaft alignment part ii zf marine propulsion. While engine alignment is well understood by most marine industry professionals, shaft alignment is far more esoteric and well understood by far fewer folks in the industry. Good shaft alignment practice should be a key strategy in the. Shaft alignment thermal growth compensation in many cases, the machines for example a pump and motor expand considerably from a cold to a hot state operating temperature.
May 07, 2007 alignment tolerances proper shaft alignment is especially critical when the motor is operated at high speeds. The objective of optimized shaft alignment is to increase the operating life span of rotating machinery. Common cardan shaft alignment with laser the cardan shaft is removed and a longarm bracket is used to overcome the offset between the machine shaft centerlines. Special brackets are available for alignment with locked rotors to increases the safety of the operator. Engines, gearboxes and propeller shafts on ships are aligned using the easylaser system. Baltech sa4300, misalignment, installation of electric. Baltech sa4300 is an electronic and mechanical alignment system with digital electronic indicators. Sheng, ndition of the shaft alignment is crucial in order to make intelligent. Changes in the temperature of machines from off line to running can have a significant impact on the shaft alignment. 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.