Have to do this in the old pfs method. Hp to raise the water 10 M (33ft) hp=g/m (15) X (Total head in feet(33')plus (19.5'/100'(loss)))all over 3960 comes out be just a little over 1/2 a hp.
This will give you 15 gallons a minute, 900 gals/hour. One of those little jet pumps you get at the...
Have run into this problem all the time. Most owners assume that what they spec. is what was received and that what the engineers have designed would be acceptabe. This hardly the case. You require a third party to come in and oversee your installation. The third party will ony deal with the...
Are these bearings in a pillow block? If so, has a proper alignment been preformed? Double row bearings can handle 30% thrust load of the bearing load. Self alignment does not mean that anyone can change and run these bearings. How was it changed? The old one cut off? Were measurements...
Your talking 0.004" deviation, big enough to drive a truck through. Dials will work quite fine. Most people that have the alignment package will know how to use them. They will also give you a report. If this is a one of, lasers run about $20k to buy, dials < $1k.
Let me see, vertical motor on a centrifugal pump, with a VFD? Bearing failures?
1. Why would you install a VFD on a centrifugal pump? The pump is designed for the requested head and flow caracteristics. You will miss the BEP with a VFD.
2. There are no bearings in a vertical pump! They...
Does anyone know the relationship between the speed of a shaft verse the oil viscosity to determine the minimum thickness of the wedge that would be created.
Background: We have a 500kg rotor that is turned via a VFD. The operators have been taken up to one hour to run this motor up to full...
tfro,
Hi, does it matter? A grade 8 is a grade 8. The symbol is for ISO tracking. All American and/or World follow the specs. for manufacturing of bolt, nuts and washers. (hopefully).
Cheers
Robert
Could be worse, could be me!
Hi lewy07
Far as I can figure you might have, an alignment problem. The so called "self aligning bearings" are NOT designed for misalignment, but minor (minor<or= 0.005") imperfections of the whole system. (slight deflections of the bearing area) The bearing housing might be tilted, or be...
Hi NoHoCa, I believe your running into a problem of "stone walling", this can be very bad for the compressor, as it starts to set up an oscillation and things start to fall/fly apart. I'll get back to on some things to try, but I believe one of the cures is to restrict the intake a little...
Sorry to say Twitchy, there just isn't any hard equations or hardened rules on plain bearings. It's, whats the application, whats the ambiant temp, what is the lowest speed/highest, what is the shaft loading, what type of material will be transported, what is the horsepower requirements, what...
Hi, the base of the information is from a third year millwright course. (Alberta Apprenticeship Program)
I had on old International Travelall 4x4 locking hubs and on the dash a warning sign was posted, "Do not to exceed 30 mph (50kph) in 4 wheel drive". I did it once and almost shook my poor...
Hi, I believe "U" joints have a lead and lag of 30 degrees from power input and torque for a grand total of 60 degrees per rotation. The older 4wd vehicles used this type of drive and were difficult to control thus speed was recommened below 50kph. Phasing of the joints is very important for...
