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Hello, Being moved out of my material comfort zone and into fluids after a job change; and in need of some basic advice. we have a pneumatic driven oil unit that can develop 700b and a flow rate of 5.3cc/stroke. The cylinder that is being supplies is a double acting design 2" bore and 1"...

thread340-256777 Following on from this earlier thread, I am also looking to replace our ageing and unsupported software with something I can link DC/AC motor/generator design created in solid-works - this is not an immediate purchase, more a toe in the water ! Ansoft Maxwell looks to have the...

hi ya, Same OEM for both units ? are you measured on the RTD's embedded within the windings ? Are the laminations in a good condition, El-CID tested ? tony.

Hello Muthu, sorry for coming in late to this. Can the OEM supply a cross sectional drawing of the motor ? What is the cooler, Air or water and is it functioning ? When the vibration step changes, is there a change in phase angle ? is there a change in process or adjacent machinery ...

Hi chaps, I'm in a struggle - we have a large vertical pump/storage unit and the bottom guide bearing is loosing oil out of the upper seal, by how much no-one knows but the feeling is quite a lot - technical reporting at its best! We're going to re-set the seals clearance back to design...

its squashed, so that the top clearance is reduced in comparison to the side - it introduces a degree of pre-load and aids stability but IIRC it can introduce susceptibility top oil whirl. tony

Morning all (or afternoon depending on your time zone :-) ) I have an old exciter in the workshop that has come in with wiped bearings, after some extensive research with the owner we've found that the bearings were originally lemon bore but were machined over years as a plain bearing - but no...

Hello all, not sure where this topic falls, but it is related to vibration - well kind of! What happens to the torque figure for a Cleveloc nut compared to a std full nut? I would expect it too reduce since the elliptical collar will increase the torsional load on the bolt, but by how...

Hi Guys, Thanks for the all the replies :-) The shell and journal are the DE of a 5MW 4pole sych generator coupled to a Gearbox and then a GT - again I apologize for the poor quality photographs and especially having the shell photo upside down :-( We were called to check the generator...

hi byrdj, Thanks for replying. I wondered the same thing, although it uses a gas turbine as prime mover, there is no barring equipment attached to generator :-( Tony

Hello Guys, I've been sent through some photographs that show odd longitudinal marking on the journals and bearings :-( I suspect that they're caused by the journal roundness, but would appreciate any views (apologies for the quality of the photographs) Thanks Tony. Clickable...

We have a simple spreadsheet that we log memos and other similar documents in and with some code to open these documents in word - and we're looking to see if we can have something similar for opening drawings saved in a PDF format. Unfortunately the code was written by a chap who has moved on...

Hi Guys, Havening not been involved in vibration for a few years, suddenly it’s creeping its way back into my life :-o I used to have a link to some ‘standard’ orbit patterns, but having changed ‘puters a few times its been lost – would anybody have a similar link they could share ? Many...

thanks

Hi guys, if anyone has a good reference book that could tell me the ASTM equivlant for BS 3602 HSF 27 I'd be terrible grateful, Thanks Tony.

Sorry for any confusion, internally we refer to the shaft as having a seat and the static support is the housing. The bearing inner ring is not a tight fit onto the rotor; it pulled off cold and checks later showed the rotor to be undersize; but no signs of the inner ring rotating. But, I was...

We have a small motor that has been repaired a few times by our sister companies, and to cut a long story short; it's ended up on my lap (very uncomfortable!). The bearings seats are undersize by 0.6mil (0.017mm) for both 6217 & NU217. Is this loose enough to cause a higher than expected...

Hello, I'm looking for a set of examples, hopefully with photos, showing general defects and causes. Any ideas? Many thanks TonyCro

For rotating applications We're moving away from spring washers (trying to but diffcult to convine some of the merits) to Nord lock washers, see http://www.nord-lock.com/ Tony.

The power of Google; it apperas that its a metal spray technique. Do hesistate to tell me I'l wrong! TonyCro