Tagged With "Alignment"

Topic

How to align the fresh vertical pump?

Ngo Dinh ·
Hi everybody, in our plant, we have four vertical pump handling fresh water for process system and in each inspection interval, we also see that the shaft is contacted with bushing/rubber bearing. The alignment of each column pipe and column pipe with...
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Vibration Tri Axial Sensor Mounting

Avinash Thawani ·
Hi, What are the pros and cons of RAT vs VAH scheme RAT is Radial Axial Tangential VAH Vertical Axial Horizontal Which one is better for Triaxial
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Re: Vibration Tri Axial Sensor Mounting

ivibr8 ·
With the HVA sheme, it is easier to understand direction/orientation of the plot. With RAT scheme, I always knew which transducer I was going to use Demodulation for (T). Other than that, it really depends on your preference; so I'm not sure there is a right or wrong answer. Always keep good records of exactly where you mounted and how you oriented the pad (assuming that's what you have) so that anyone can properly re-mount and orient it properly.
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Re: Vibration Tri Axial Sensor Mounting

fburgos ·
its all about how you like it, for me t is h and r is v someone like xyz, the convention is between you and your coworkers.
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Re: Vibration Tri Axial Sensor Mounting

Callum S ·
Call it whatever you want but be absolutely certain everyone who may collect the data is on the same page when doing so. Repeatability is paramount.
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Re: Laser Shaft Alignment - Recommendations

Bassnjunky ·
Walt, Regarding listing pros and cons for our existing units is irrelevant due to the age of the units. Why would we choose a brand we do not have? - It only seems practical to way all options with all units - new and old. Yes, I do understand what features would add value for my team - I did not want to lead/restrict opinions. Yes I am an experienced user in my past but also open to "constructive" feedback from those that utilize these tools on a daily basis. I appreciate your time in...
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Re: How to align the fresh vertical pump?

Shurafa ·
If I understood your post correctly, you may need to perform a concentricity check. This is a critical task that is usually conducted in the machine shop using a lathe machine on the parts you mentioned. All parts (rotating or stationary) should have a reasonable concentricity otherwise, the wear rate will raise. If the centerlines of these parts are not aligned well enough, either assembly or operational problems will be faced. Regards- Ali M. Al-Shurafa
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Re: How to align the fresh vertical pump?

Ngo Dinh ·
Thanks Shurafa, The thing we concern that is clearance for spigot fitting. Do you know any standard mention to the clearance?
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Re: How to align the fresh vertical pump?

Shurafa ·
In my world, I may accept up to 0.005 inch diametric clearance for a small-medium size motor with 1800 rpm or less. But this is not an international standard. You may find more details on your own shop's repair procedures. Regards- Ali M. Al-Shurafa
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Re: How to align the fresh vertical pump?

Dan Timberlake ·
Originally Posted by Ngo Dinh: Thanks Shurafa, The thing we concern that is clearance for spigot fitting. Do you know any standard mention to the clearance? =========== In US motors and generators the spigot/pilot diameter dimension is often called "AK". Spec with tolerances is MG 1-4.08 http://hupp-electric.com/techn...D&u=691231060000
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Re: How to align the fresh vertical pump?

rgf12 ·
There is a good wrap up of vertical pump installation in this months (Nov 2015) Pump and Systems magazine. It develops each step in the process and gives acceptable tolerances. A good place to start your learning process. pumpsandsystems.com
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Re: Prealignment and Final alignment of pump during construction stage

Mahmoud Allam/sadara ·
Good day Vikramdeeps, my recommendation is don't accept the equipment. For example if you have motor connected to pump and you need to remove 3 mm from the base structure of the motor for example but unfortunately you couldn't due to many reasons related to the piping or cement or any other things...,tell me what you are going to do??,then the best practice is to don't accept it or you can accept it in very limited situation and this should be case by case, not in general if you are pretty...
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Prealignment and Final alignment of pump during construction stage

vikramdeeps ·
Hi Guys, During construction stage , For centrifugal pump if the prealignment is out of tolerance ,can it be accepted, as the contractoe says he will bring the readings within tolerance during final alignment of the pump.What is the best practice for prealignment and final alignment?
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Laser Shaft Alignment - Recommendations

Bassnjunky ·
I am currently looking to upgrade our Laser Alignment tools. We currently have several different brands and we will standardize on one. Just seeking end users experience with different brands, not looking for sales pitch. Any info is appreciated. Items we are looking at, ease of use, ease of downloading, battery life, etc..
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Re: Laser Shaft Alignment - Recommendations

Walt Strong ·
If you have several different brands already, why can't you make a list of pros and cons and choose amongst them? Why would you even consider choosing a brand that you don't even have it all? Do you even know what features are important to you? Have you personally used each of these brands your company has, or are you relying on the user experience from others in your company? What upgrade features do you think are really important for the types of equipment and personnel skill levels you...
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Re: Laser Shaft Alignment - Recommendations

IrishMark ·
Well ask yourself this 1. whats the maximum span between measurement points you need? 2.do you have a vertical alignment requirement? 3. Do you need to align a multiple train e.g motor gearbox Pump/fan/etc? or is it simpler machines? Motor coupling Pump/fan etc? 4.Do you require the ability to generate conformance reports from the aligned equipment?
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Re: Laser Shaft Alignment - Recommendations

Rotate ·
We use the Pruftechnic Rotalign IS. However, we are an alignment consulting group. We use all the features of the box, shaft alignment, bore alignment, vertical machine alignment, level alignment, etc. It is also NIST traceable which is a requirement for some of our projects.
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Re: Laser Shaft Alignment - Recommendations

Torptorp ·
I also feel like IrishMark. Figure out what you need to accomplish with the alignment goals you need. Write down that list. Then bring in different vendors to demo their products. Prufteknik Rotalign Ultra iS are great machines (we use them here) But not everyone needs everything that it can do. There are many companies selling alignment systems... Some work great for very basic get it in the ballpark alignment. But you get what you pay for. Don't get hung up on cost alone. If the alignment...
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Re: Laser Shaft Alignment - Recommendations

Vendor Disclosure. You could give Stealth Series Alignment products a try (product of Hamar Laser-50 year veterans of the industry and American made)...www.stealthalignment.com or www.erbessdreliability.com Give us a call or shoot us an email we would be happy to help.
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Re: Laser Shaft Alignment - Recommendations

Akhil Rathore ·
give a try to SKF make TKSA 11 & do the alignment using your phone also would suggest you to check the max shaft size length you need to align,
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Re: Laser Shaft Alignment - Recommendations

Big J ·
We have a TKSA 11 as well. Comparing that to a rotoalign is like comparing a Yugo to a Ferrari. They both serve a purpose. The interface on the TKSA 11 is the easiest I have used. I could teach someone with little alignment experience to use it in 5 minutes, however, it is very limited in the span between measurement points....I have begun to appreciate the companies that take a product like an iPad and use it for our purposes. The cost savings and ability to update the products quickly is...
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Re: Laser Shaft Alignment - Recommendations

DBTCMP ·
Big J the TKSA51 will cover up to 5metre centres and has similar user interface. Tksa11 is only for smaller pumps 18cm centres.
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U-Joint Jackshaft alignment

Alvin MC ·
Some folks don't realize the importance of avoiding angularity (parallel offset) when installing a u-joint and wonder why it failed even before they had a chance to do maintenance. I would like to know what are the common practices on installing a universal jackshaft (cardan shaft) for proper alignment? Is it common not align them?
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Re: U-Joint Jackshaft alignment

John from PA ·
Your choice of words, "angularity (parallel offset)" may be a typo or some confusion on your part When you have a parallel offset situation there is no angularity between the shafts. The two shafts are offset but parallel. In angular misalignment there is a difference in the slope of one shaft relative to the other shaft. You should check https://vibralign.com/shaft-al...set-shaft-alignment/ for information specific to aligning a cardan shaft. Note the special brackets. I have had good...
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Re: U-Joint Jackshaft alignment

Dave Reynolds ·
Some additional resources for your review http://www.pattersonpumps.com/...Driveshaft%20IOM.pdf http://65.170.161.218/~spicerp...aft_installation.pdf http://www.hurst-drivelines.co...ment_Proc_111606.pdf Dave
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Vacuum Pump grid coupling failure

Alvin MC ·
This paper machine vacuum pump set has three vacuum pumps coupled in series to one drive. We broke the coupling to change the middle pump (left on pic) due to BPFO bearing defect and found damaged grid teeth on the opposite pump. i have seen the broken grids before but never the teeth. I wouldn't think alignment was an issue, could be overload??? What you guys thinks?
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Re: Vacuum Pump grid coupling failure

Dave Reynolds ·
Alvin, 2 cents, the coupling hub teeth appear to be severely worn, the wear allows the grid to put pressure at the corners of the teeth instead of even pressure distribution across the tooth face. The teeth to the left of the three that are missing appear to have a very wide gap between the teeth? The teeth that are missing, the break appears to be old, suspect they have been cracked for awhile Do you have pics of the grid? It too holds valuable visual evidence Dave
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Re: Vacuum Pump grid coupling failure

Michael Meehan, CMRP, CRL ·
I wouldn't make any assumptions about alignment not being a problem without having checked it first. Overload is also a possible factor in a machine train like this where all shafts are the same size and in general designed for driving one machine. The middle machine coupling has to carry it's own load and the load of the machine after it. The first coupling (at the motor) carries the greatest load, I'd inspect it as well.
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NEW VibrAling- Laser Alignment- Hog Shaft for sale!

Raul Rios ·
For Sale. Totaly new. Price: US $ 4,125 Can write by mail: ensayospredictivos@gmail.com
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Re: Need Advise Please-alignment tool recommendations-

John from PA ·
What types of machines are you aligning? Something that is close coupled (motor direct drive to a pump) or at the other extreme a cooling tower drive with a 25 foot composite shaft? It can make a difference and you haven't specified what you are aligning or the industry type.
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Need Advise Please-alignment tool recommendations-

Chris184 ·
No experience here in doing alignments, but now looking into getting a laser alignment system. Currently on the list is a Rotalign Ultra IS, Easy Laser E710, and a Fixturlaser NXA Pro. For you guys that do alignments what is your tool of choice. If you were to buy one today, what would you buy and why. Id like to try not to end up with something that will be regretted later. Something that will be important is the report generation feature, and I'm thinking that an emitter and receiver on...
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Re: Need Advise Please-alignment tool recommendations-

Mark Cloutier ·
Please email and Can send a recent specification for alignment equipment. MCloutier@maconwater.org .
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Re: Need Advise Please-alignment tool recommendations-

Chris184 ·
John, I imagine it would be mostly the standard NEMA frame motors and whatever they are driving. Given the nature of the request, as all encompassing as possible. I have had request for both examples you've given.
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Re: Need Advise Please-alignment tool recommendations-

Dustin Faust ·
I haven't used or seen the Rotalign Ultra IS, but I have been using Pruftechnik Equipment for the last 7 years, and wouldn't recommend anything else. We currently use the Optalign. I like the quick report features, the wireless heads, and the maintenance workers find it simple to use.
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Re: Need Advise Please-alignment tool recommendations-

DBTCMP ·
If you just intend horizontal alignments and don't require atex compliance I would recommend an SKF TKSA41. I have just come off a day training guys in the operation of it and yeah while I am biased....I can say with confidence it's a very user-friendly and capable unit. https://www.youtube.com/watch?v=cQxjYplrsRg
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shim materials

JABE ·
Hello, Can anybody tell me the difference in using ss shims vs steel shims for alignment? In what environment should I use ss shims? Are the ones that come in a box able to work? Regards,
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Re: shim materials

Hossam 2 ·
i think stainless steel shims is better for the corrossion it resist the corrosion thus the alignment readings still the same
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Re: Need Advise Please-alignment tool recommendations-

czJKr ·
The Rotalign device is regarding to me the best choice at all. If you want, you can use the Rotalign heads technology with Emerson CSI2140 device. Pruftechnik was an inventor of these technology. That is the reason all other uses more-laser/detector technology. The Rotalign system is very precise and can easy reach/meet excellent results. Few times I compare any other system with Rotalign. Results was always very acurate, repetitive and quite easy to take/measure. As you can read on an old...
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Re: Need Advise Please-alignment tool recommendations-

fburgos ·
Hamar laser, their stealth line are great products
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Re: Bolt bound, Alignment in horizontal position

John from PA ·
Your use of "routine alignment task" makes me ask the question is this a first time alignment, or is it a machine that has been in extended service and for some reason is being realigned? If it is a machine that has been in service, one has to ask a few questions: 1. Was it ever aligned properly? 2. Could there be some foundation issues that have caused a shift in machine position? If so perhaps those issues need to be properly addressed first. 3. Is there improper use or maintenance of pipe...
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Bolt bound, Alignment in horizontal position

CharlieRB ·
All; What methods or techniques do you use to resolve a horizontal bolt bound condition when performing a routine alignment task? Do you ever slot the foot bolt holes? Do you beg for more time from the powers-that-be to allow you to attempt to reposition the driven component? We have encountered what we believe to be situations where the OEM has not adequately aligned the component and modifications to the mounting base is required. Does slotting the holes of the feet have an adverse long or...
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Re: Bolt bound, Alignment in horizontal position

Big J ·
I prefer to neck down the hold down bolts over slotting the equipment. I worked at a chemical plant that had all of the pump base plates built at a local fab shop and nearly every pump was bolt bound to some extent. We necked down bolts on a ton of motors and never had an issue. On a few of the grossly bolt bound motors we used a tapered ream to oversize the motor holes and use belleville spring washers on the hold down bolts. If pipe stress wasn't an issue on many pumps we could move the...
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Re: Bolt bound, Alignment in horizontal position

Dustin Faust ·
I have found that drilling out, or slotting the mounting base is more effective in the long run. So the same problem does not occur when the motor is replaced. If the mounting bolts are threaded into the base instead of through bolts, then as Big J said. necking down the bolts, or buying shouldered bolts is what I often did. If you modify the motor feet, then this needs to be done every time the motor is replaced.
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Re: Bolt bound, Alignment in horizontal position

Big J ·
No problem. If you want to post a picture or a description of the machine in question we may have some ideas for you.
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Re: Bolt bound, Alignment in horizontal position

CharlieRB ·
All, thank you for your input, it is greatly appreciated. Charlie
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Re: Need Advise Please-alignment tool recommendations-

Mrunal Dave ·
Agree with Mr. CZJKR, Pruftechnik are masters in alignment when it comes to the Accuracy. Using Rotalign from decade, no issue till date.
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Re: Need Advise Please-alignment tool recommendations-

Onur Gün ·
We use Optilign Smart and I can recommend Prüftechnik. Stability is good and you can get repeatable results by the way. I think it is the most important point at this kind of tools. Otherwise you can go off the rails while alignment.
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Causes of unbalance in rotating machinery

Maintenance Training ·
WHEN SPINNING EQUIPMENT IS OUT OF BALANCE When spinning equipment is out of balance. Vibration from out-of -balance rotating equipment can be frightening. The ground shakes, machines jump about, hold down bolts come loose and parts break. An unbalanced rotating body will produce forces on its bearings and transmit them throughout its structure and into the foundations. The drawings below provide examples of some of the problems listed in the table above. CAUSES OF OUT-OF-BALANCE Below lists...
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Re: Laser Shaft Alignment - Recommendations

vishal sharma ·
TKSA 41 is best it also cover the distance upto 5m and easiest to use.
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Vertical Motor High Vibration

Vibration_guy ·
Dear All , I'm Posting The vibration Details of One of my Vertical pump. The pump was running fine. But some days before we opened the Pump as we have been reported to arrest the Water Leakage. But after completing the overhauling work and mounting it on the structure high vibration observed. I have posted all related spectrum s that i have taken during Trial Run in loaded condition. However the vibration is same as No load condition. i'm Suspecting Structural/Base looseness but want to know...
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