Har du någonsin lagt till antalet shims som ditt uppriktningsverktyg säger att du ska göra bara för att upptäcka att din maskin fortfarande inte är korrekt? Detta är en frustrerande men vanlig förekomst. Var det ett beräkningsfel eller gav ditt axeluppriktningsverktyg dig fel information? Mer än troligt är dina shims är skyldiga.
Verifying your machines' issues using phase analysis can be a very effective method of verifying faults discovered during an inspection. Vibration programs can be made more effective when phase, particularly cross-channel phase analysis, is applied properly.
To calculate the cost of misalignment, first determine the cost of the machine’s downtime.
Belt Drive advantages - quiet in operation, require no lubrication, and are relatively cheap to produce.
Vibration analysis is a useful way to monitor machine health. Many plants have implemented regular vibration analysis plans to ensure the condition of their machines is being checked at regular intervals and so, if an issue comes to light after spectral analysis, a solution can be pursued.
When analyzing vibration, it is important to be familiar with several terms. These are:
Frequency
Disp
For the field portion of a recent training class, the decision was made to check the alignment on a plastic extruder. At first glance, checking the alignment of the motor shaft to gearbox input shaft is pretty straightforward. However, the output side of the gearbox had two shafts, so maybe this is not so straightforward. And to complicate things a little more, there are three more chambers co
Laser alignment systems are a tool and as such show the user what is occurring “mechanically” during the alignment process, including if components are moving during said shaft alignment process. “If it moves, the laser will see it”.
It is both possible, and desirable, to minimize the negative effects of soft foot. While it may be difficult to completely get rid of soft foot, it can typically be reduced to a few mils, if the following techniques are used.
There are many things that can affect the precision shaft alignment process, which needs to be checked and eliminated during the Pre-Alignment Steps, such as pipe strain, disintegrating bases, bearing or coupling wear, One of the main issues concerning shaft alignment of rotating equipment is the challenge of soft foot and its detrimental effect on the alignment process.
While at facilities across the country I noticed a lack of understanding regarding the need for precision alignment of offset shaft driven rotating equipment. 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 Fixturlaser NXA Pro has been selected as the laser shaft alignment tool to be used in the Industrial Mechanic Millwright competition at this year’s WorldSkills event, being held in Abu Dhabi on October 15-18.
I read an interesting article in the June/July 17 issue of Uptime Magazine. It was titled “The Reliability Impact Within the P-F Curve” by Randy Riddell. Randy is the Reliability Manager for the SCA Barton Mill in Alabama.
I encourage you to read the full article (https://reliabilityweb.com/articles/entry/the-reliability-impact-within-the-p-f-curve). The article includes the following graphic t
If possible we want to have the sensors in a horizontal plane when the live screen is activated so the sensors are in position to monitor the horizontal correction. For rotating machines with large mass or that are difficult to position precisely, this may be time consuming and/or not possible.
A customer called me, extremely frustrated, because he could not get a good alignment. “I’ve spent two hours trying to align this stupid pump!” he said. He blamed the laser, the “cheap” pump his company had, the bad base, his bad trainer (me), and anything else that came to mind.
I did not take it personally, because I’ve been there too! I listened to his frustrations, and let him vent. And
Some people believe that precision laser shaft alignment has evolved to the point where pre-alignment steps, such as roughing in the alignment with a straightedge, are no longer needed. Well, quite frankly, those people are wrong!
The reason for roughing in the alignment has little to do with how accurately the lasers/sensors measure. It has nothing to do with how big the laser detector is, o
I had the pleasure of working with the maintenance team at a South Carolina manufacturing plant that had an outstanding alignment kit they rolled out to every alignment job.
This question comes up frequently in our Shaft Alignment Best Practices training classes. The result screens below both show two different aligned machines meeting 3600 tolerances.
Fixturlaser has launched a new Bore fixture: Bore Fixture Non Mag ø290-620mm. There are two different 3-leg fixtures in the package. One covers bore sizes from ø290 mm to ø400 mm, and the other one covers sizes from ø400 mm to ø620 mm.
A gap between one foot of a machine and the foundation generally is referred to as “soft foot.”
As technical trainers, we travel all over the country visiting factories, mills, power plants and refineries. Just to mention a few. We see and work on equipment of every type and size. From small 10 HP electric motors and pumps moving cooling water, to house sized engines turning generators that power our cities.