×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

CASING PUMP PICS

CASING PUMP PICS

CASING PUMP PICS

(OP)
Please have a look at these pics.
http://picasaweb.google.es/mulder.pirata/LbumSinTTulo/photo#50702826
http://picasaweb.google.es/mulder.pirata/LbumSinTTulo/photo#5070282678688807810

Coud you give me any advice about it?
Many thanks in advance
Its a vane pump, whose casing has broken in this way
we don´t know what the reason is.
I give you some details:
Fluid: olive oil
Working Tª:20ºc
density 0.9 kg/dm3
Flow: 30000 l/h
Working pressure: 3 bar
Pump speed: 640 rpm
viscosity at working Tª= 500 SSU.
pipe diameter 3"
pumps port diamter: 21/2"

RE: CASING PUMP PICS

You did not mention if this was a sliding vane or flexible vane design.  We have sliding vane compressors which have experienced similar catastrophic failures.  In these machines, the vanes wear at a slow rate during normal operation.  If the wear of the vanes is allowed to progress beyond a certain point, the vanes get short enough to come of out of the grooves in the rotor.  The vanes can then lodge between the rotor and the inner casing resulting in sudden catastrophic failure.  A pump (or compressor) of this sort would also have a pressure limitation that would be critical.  If the pressure on the discharge were too high, the vanes could break or fold over and a similar failure could occur.  I would disassemble the pump and inspect the condition of the vanes. If they are sliding vanes, measure the length of the remaining vanes and compare that to the pump manufacturer's recommended minimum length.  Also check with the operators to see of there is any chance that the pump ran with unusually high discharge pressure or was accidentally run blocked in.

Johnny Pellin

RE: CASING PUMP PICS

(OP)
They are a sliding vane pumps.These pumps only have been working for 14 days. I mean The vanes dont have time in order to wear.
So it would be caused by ambiental temperature changes, but there is not a big diference between the day and the night.

RE: CASING PUMP PICS

In such a short period of time one has to suspect either a casing problem, ie poor casting, or a process problem ie shut discharge and inoperative relief valve.
Probably the latter I suspect as a reputable pump manufacturer would pick up such a serious problem with a casting.
Check the process history. Who made a boo boo???

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources