Hi All,
Just to update on the latest development. Electricpete and Hydtools, you both should be correct regarding the torsional failure of the shaft. The pump manufacturer just got back to us. They have verbally informed that their initial re-calculation found that the stresses at the keyway is...
Yes electricpete, I did mean radial force.
But was wondering what could be the cause of this force.
Attached below are the pictures of the shaft failure.https://files.engineering.com/getfile.aspx?folder=ece3a131-edf9-4990-b3ea-4ed3c72fdf2b&file=CFD48CDC-5502-4C06-9560-82253C02D1E2.jpeg
Hi Artisi,
There was no abnormal operating conditions of the pump during that period. And weekly patrols by the field man and maintenance team did not detect any abnormal running conditions of the pump. NPSHa is not an issue based on the tank level readings over that period.
The only difference...
Oh no, please don not misunderstand. It’s just one of the possible causes we are brainstorming to find the most probable cause. Anyways, more details of this pump as follows:
1) Pump was taken out of service as it was reported there it was unable to deliver flow.
2) There was no high ampere trip...
Hi All,
Am new here so would like a little advice regarding this.
In our plant, we have a non seal canned motor pump that recently had a failure where the shaft broke at the keyway connection to the impeller.
We suspect it might be caused by the radial thrust of the pump as it is operating at...
