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Shaft Alignment
United States
Приєднався 26 чер 2017
The Shaft Alignment channel is designed to educate you on the science and art of installing and aligning industrial rotating machinery. As you are well aware, equipment reliability is a key issue in virtually every industrial complex today and proper machinery alignment is paramount in achieving dependable operation with a minimum of maintenance. The premise of these videos are to provide you with the knowledge to accurately align any type of rotating machinery drive system in a variety of different ways and to ensure that you are following the guidelines set forth in the ANSI Shaft Alignment standards. The information in these video training tutorials is identical to the material taught in our popular Basic, Intermediate, and Advanced classroom training courses. All tutorials are narrated by John Piotrowski, the author of the Shaft Alignment Handbook.
1-11 Bracket Sag and Uncouple
When using mechanical brackets, gravity has an effect on the tooling ... and the bracket sag that exists in your set up must be measured and compensated for. We will also discuss whether or not it is a good idea to keep your couplings engaged when taking alignment readings.
Переглядів: 4 520
Відео
1-10 Validity Rule
Переглядів 70 тис.6 років тому
When aligning rotating machinery it is imperative that you obtain accurate shaft positional measurements. It is very easy and very common to make mistakes when taking these measurements so this tutorial will illustrate what you have to be aware of when taking your alignment readings to insure that the measurements you obtain are accurate and repeatable. There is a mathematical pattern that occu...
1-9 Shaft Alignment Measurement Basics
Переглядів 57 тис.7 років тому
The major topics in this tutorial will discuss the basic roughing in techniques for your initial alignment of machinery. You will be introduced to the five primary alignment measurement methods. We will also cover how to override a runout condition when taking your measurements.
1-8 Vibration on Misaligned Machinery
Переглядів 7 тис.7 років тому
The major topics that will be discussed in this tutorial will start off analyzing the two basic types of forces that act on our rotating machinery. Static and dynamic forces were mentioned in the first tutorial in this training series but we will take a look at the relation and interaction between them here. An abbreviated list of some of the problems that can be identified using vibration anal...
1-7 External Connections
Переглядів 2,2 тис.7 років тому
The major topics in this tutorial will discuss the issues that can arise when attaching external connections to our rotating equipment ... and how to determine if external connections such as piping, ductwork, or conduit is inducing excessive forces and stresses into our machinery.
1-6 Soft Foot
Переглядів 8 тис.7 років тому
The major topics in this tutorial will discuss what soft foot is and why it should be corrected. How you should go about finding your soft foot issues and the four steps necessary to correct this often overlooked and misunderstood problem.
1-5 Runout
Переглядів 15 тис.7 років тому
The major topics in this tutorial will discuss how a dial indicator works ... how to perform a shaft lift check ... how to measure runout ... what are acceptable amounts of runout on rotating machinery ... how to determine what is causing the excessive runout and what you need to do to correct it ... and how runout is frequently and unknowingly overlooked when aligning the shafts of our rotatin...
1-4 Foundations, Baseplates, and Frames
Переглядів 4,6 тис.7 років тому
The major topics in this tutorial will discuss the basics of how rotating machinery is attached to structures. The three basic types of rotating machinery support systems ... the types of baseplates machinery is attached to ... and problems to look for on foundations, baseplates, concrete, grout, and anchor bolts.
1-3 Eight Steps of Shaft Alignment
Переглядів 8 тис.7 років тому
Discusses the eight major steps involved when aligning rotating machinery.
1-2 Definition, Couplings, Alignment Tolerances
Переглядів 19 тис.7 років тому
The major topics that will be covered include: the standard terms used to describe a misalignment condition, the one common design feature inherent in every flexible coupling, defining what shaft misalignment is, what are acceptable amounts of misalignment and what tolerances you should try to attain, and some statistical information on what the estimated time to failure of machinery might be w...
1-1 Introduction to Shaft Alignment
Переглядів 25 тис.7 років тому
The major topics that will be covered include: the four key ingredients to successfully align machinery, the symptoms you will see if machinery is subjected to run under a misalignment condition, some basic design principles of rotating shafts and the bearings that support them, and the types of static and dynamic forces that occur in machinery.
Introductory Shaft Alignment Tutorials - Content Description
Переглядів 5 тис.7 років тому
Describes the content in the eleven Introductory video tutorials on Shaft Alignment.
Thanks
Thanks, very useful.
Don’t know if you’re still active on here but thank you for these videos, this is the most detailed videos on this subject on UA-cam, as a 24 y/o maintenance mechanic trying to learn as much as i can as fast as i can thank you. i hope to be of your skill and knowledge level one day
Flamer- Thank you for the kind words. Yes we are still here despite the fact that UA-cam no longer pays us for the advertising. We don't plan on removing these videos because of people like you. Thank you for your interest. John Piotrowski.
thanks
thank you for making this series of courses. it made me even more confused. What can explain the mechanism behind reduced vibration as the result of misalignment?
The explanation for why the vibration decreases is explained in slide 16 in the tutorial. Here is the text for the narration of that slide ... If you remember, a short while ago, when we were talking about things that put static loads on bearings, it was mentioned that three very common sources of static forces on bearings were gravity, or the weight of the rotor, belt tension, and shaft misalignment. So, let’s examine the static forces that are present in these two shafts and for this discussion we are viewing the shafts in the side view. The shaft on the left has some weight so there is a downward force on it due to gravity. Each bearing produces an upward force opposing the gravitational load. Similarly, the shaft on the right sees the gravitational force and its bearing produce an upward force to oppose the gravitational load on them. If we begin to misalign these two shafts, the flexible coupling accommodates a certain amount of the misalignment but once that is exceeded the shafts will start elastically bending. The gravitation forces are still there but now, through the coupling, the shaft on the right induces a downward force on the shaft on the left. This force now produces an additional force on the inboard bearing in the downward direction but it will produce an upward force at the outboard bearing. The shaft on the left produces forces on the shaft on the right also. Through the coupling, the shaft on the left induces an upward force on the shaft on the right. This force now produces an additional force on the inboard bearing in the upward direction but it will produce an downward force at the outboard bearing. If we continue to misalign these two shafts, the shaft begin elastically bending even more. The gravitational loads are still present, across the coupling, the downward force on the end of the left shaft has increased as well as the reactionary forces on its bearings and the upward force on the shaft on the right has increased as well as the reactionary forces on its bearings. Shaft misalignment induces static forces on the shafts that will diminish the amount of motion / vibration that is occurring.
A degree wheel or increments on the outside edge of the flange/disc diameter would be ideal, and so would a tangential alignment dowel/rod tube on the fixed machine positioned to perform alignment measurements on the adjustable machines rotating shaft and or flange/disc outside diameter which should have incremental 360° markings stepping up increasing at every 5° 10° dot point at every 30° (except @ 0-360°,120°,240°) 45° maximum size at every 90° only diamonds at 0-360° 120° 240° all you need to know is the center and constant radius or diameter
Great suggestion Tom. Thank you for your input. John Piotrowski
Thank you for this explanation. It is enlightening. And, I felt that the textbook I bought that you wrote, Shaft Alignment Handbook is now in supported with audio and video.
Great video information 👍 thanks for sharing your knowledge and experience 🇵🇭🫡
Thank you very much! Clear and very informative - information I needed to know & apply.
thank Engr John for this tutorials , really appreciate Sir !!!!
You are most welcome!
you're the best Mr John
Only 1-3 part not running
If the coupling face has 6 bolt holes, place one hole at 12:00, insert a bolt at the 1:30, 10:30 and 7:30 positions. The bolt should have a nut on the backside of the face lightly tightened so the head of the bolt may be turned by hand. An electrician's level can be mounted to the two bolts at the 1:30 & 10:30 positions and the leveled. The hole that was placed near the 12:00 position should now be within a couple of degrees for zeroing. Likewise, when you need the left/right positions, you use the same procedure for locating those points using the 10:30/7:30 bolts.
Great suggestion Dennis. Thank you for your input. John Piotrowski
Thanks John
Hola tiene nivel intermedio? Videos grabados para poder acceder?
Tube video of people using a subaru Roof tent
Could you please share the slides used during presentation? Thanks in advance.
I watch these just to listen to the narration. Like soothing white noise to relax to.
Muchas gracias por la explicación.
hi. why when measuring 2 sides we have negative results .but not 1 side negative , 1 side positive . please explain . thanks
Words can't describe how I feel, thank you Mr.John Piotrowski for this amazing tutorials which peresented in a simple informative way, you sir a true genuis, I am looking forward to check out the rest of tutorials, hopefuly the rest of tutorials will be affordable especialy for people from low income countries, agian thank you sir, best regards
Thank you so very much for the kind words. I hope that this information has helped you. We are hoping that the remaining tutorials will be available in the next few weeks. Thank you for your interest. John Piotrowski
@@shaftalignment6105 Alright Sir, could you please make an announcement when they avaliable.
What a super explanation 👌👌👌💕💕
Good thanks for this video series. I have seen them all clarify many doubts but the vibration analysis generates another dimension to the alignment and as I think it has happened, myths that are taken as facts in the industry are falling. For example, it is determined by its traction and its tests that the vibration and the alignment does not have an appreciable relationship for a diagnosis to have and greater certainty of the alignment would be with the temperature of the flexible elements the coupling that is what I take as more evident . With these videos I realize that we have to register more variables and analyze because there is nothing clear, the only thing would be the duration of the equipment without failures for the longest time and its study in it. That is to say that to align and have a not vast idea with the laser and a vibration pencil, it is also necessary to improve with nearby thermal cameras (the temperature guns are not exact to my experience, only referential there is a lot of difference) improve the equipment for taking vibrations to have up spectra. Finally, I see that it is not based on lasers myself and investigated and how that its precision is not greater than that of the dial indicators, only that as they have programming that performs the calculations it is easier and takes less time, I would like a topic on this (the instruments for alignment and monitoring) Thank you very much for sharing quality information.
Hi, great speech at the end, thank you!
Thank you for watching.
Very well explained
Pravindra: Thank you for watching the video and the kinds words. John Piotrowski
Great video, thanks!
Superb tutorial. Thank you
Stephen: Thanks you for the kind words. Hope the information helped you in some way. John Piotrowski
Engineer John, I have question. For the validity rule (Top + Bottom) = (South + North) Using clock symbol (12:00 + 06:00) = (03:00 + 09:00) This rule is applicable on Rim Only or Radial readings? How about the Face Readings or Axial, Same or different? Kindly enlightenment me. Thanks 👍
Amir: The Validity Rule applies to either radial / rim OR face / axial measurements.
Thanks very much Engineer/ Sir John 👍
Hi
Hindi me bhi video banaya karo sir
Dear sir, thanks for the videos. Your videos are really great. Kindly upload videos about vertical alignment methods and double face alignment.
Please ad more sample laser alignment how to align and add simming or minus
The very Best Alignment Tutorial I have ever watched. It's full of practical advises and tit-bits that are very helpful. The tutorial on soft foot simply blew me away! Thanks Engr. John. Thank you so much.
Darkland Curious: Thank you for the kinds words. I hope that this information will help with your rotating machinery. John Piotrowski
You have very useful videos
Mario: Thank you for the kind words. I hope that the tutorials will help with your rotating machinery. John Piotrowski
@@shaftalignment6105 they are very helpful in combination with recommended books.
Pls sir add in our topic reversed alignment method
thank you its very helpful
Thanks sir for detailed information.
Muchas letras, pocos números.
Thank you
excellent
Buenas Muchas gracias por la informacion, apesar que entiendo un poco el ingles, seria bueno tener todos estos videos traducidos en español o tener textos . Algun sitio que me pueda recomendar. gracias.
Mr.John what about lift check of the bearings radial clearance ?
Muhammed: Great question. Shafts that are supported in journal bearings (a.k.a. sleeve, babbitt, plain, hydrodynamic, bushing), require a certain amount of clearance for the lubricant to get between the shaft and the bearing when the shaft is rotating. This clearance is typically 1 mil per inch (1 micrometer/mm) of clearance. For example, a 6 inch diameter shaft would have about 6 mils (0.006") of clearance. Assuming that the shaft is horizontally mounted, once the shaft gets up to speed, the shaft does indeed lift up on a thin film of lubricant but the film thickness only ranges between 0.5 - 1 mil (0.0005" - 0.0010"). The shaft is not going to automatically center itself inside the bore of the bearing because it needs a film of lubricant to run on. If both shafts on a two element drive system have journal bearings, the they both would lift up about the same amount making the oil film thickness a non-issue. If one machine is supported in journal bearings and the other shaft is supported in rolling element bearings, then you could set the shaft supported in journal bearings about 0.5 - 1 mil lower to compensate for it but that's almost not worth worrying about. Thanks for your interest! John Piotrowski 3/30/2020
I downloaded all tutorials it very useful, thank you engineer john
Tahseen, I hope these tutorials are helpful. Thank you for the kind comment! John Piotrowski
superb
Why SAG affects the horizontal readings?
Carlos: For horizontally mounted shafts, typically the side (horizontal) readings are the same so they cancel each other out. Sag only affects the top and bottom (vertical) readings. For example, if you were using a bracket that had 10 mils of sag, when you check the sag, there would be 5 mils of sag on both side readings.
@@shaftalignment6105 I have another question, why divide they SAG value by two when using the reverse dial method, and when using rim and face method the SAG value is the complete value?
@@carlosaguilar4505 Carlos: For horizontally mounted shafts, when using mechanical brackets and dial indicators, the amount of "sag" that occurs from the 12 o'clock to 6 o'clock reading is being affected by gravity which needs to be compensated for when aligning your machinery. For example, if you had a bracket and indicator arrangement where you had 10 mils (-10) of bracket sag from the 12 o'clock to 6 o'clock measurements and you saw -40 mils for your bottom reading, 10 mils of that -40 is due to the "sag" in the bracket. If you would have had a "perfect" bracket that had no sag at all , you would have only measured -30 for your bottom reading, not -40. Why? Because 10 mils of the -40 reading is due to the sag in the bracket. To compensate the bottom reading for sag, regardless of whether it is a rim or a face reading, you subtract the amount of sag to the bottom rim or face reading. Sag also has an effect on the "side" readings and it is typically symmetric where the effect of the sag for the side readings is HALF of the amount you observed from the 12 o'clock to 6 o'clock position. This is true for any rim or face measurement and it's true regardless of whether you are using the Reverse Indicator, Face-Rim, Double Radial, Shaft to Coupling Spool, or Face-Face methods. Thanks for your interest! I hope I answered your question.
@@shaftalignment6105 thank you Mr. John, i have one more question, why in your book, specifically in the reverse dial method, You take it the readings in both dials at six o'clock? Thanks for your attention
Top notch training. Thank you!
Excellent excellent excellent 👍👌✌️👌👍✌️👍👌👉👉👉👉
Bikramjit: Thank you for your kind words. They are appreciated. Here is hoping this information will help you. John Piotrowski
alignment yes
Nice nolej