electricpete,
I too have wondered whether it's possible that it was a provided feature that was never used for the existing pumps. It was installed over forty years ago so information is slim except for some old layout drawings. A brace will need to be utilized on the new pumps though per the...
electricpete,
Thanks for the response, we had a meeting with the pump manufacturer last week and their reasoning for the brace was to provide additional support due to:
The static/thermal nozzle loads we provided from the stress analysis.
The load due to the change in fluid flow direction...
Good morning All,
Sorry for the delayed response, I've been away from my laptop for the better part of a week now.
Some updates on these pumps:
Most design aspects of this pump, including the base plate, pump stool, brace, etc., are being designed by the manufacturer. Our company is not...
Thanks for the response @desertfox,
The pump mounting flange is fastened to an approx. 2500 lb pit cover as shown below.
The pit cover itself is resting on concrete that is part of a raw water intake structure extending out into the river.
As to why they wanted to install the brace, I am not...
Good morning all,
I have completed the stress analysis on two vertical turbine pumps and have gotten my nozzle loads. The vendor wants to put a brace on the back of the pump that will be connected to a nearby steel beam. I'm trying to work out the correct loads on this brace from the resulting...
My apologies to both @ax1e and @bimr for the late response,
bmir,
The momentum equation provided is analogous to the velocity component of the reaction force equation found in B31.1 . Thank you for providing the additional information as well, I have not found this unbalanced hydraulic force at...
@ax1e,
Thanks for coming back with this response. I appreciate it. I've had to reread this a few times, so correct me if I'm wrong with the following.
At the river's minimum elevation, the difference in height between the nozzles and the water's surface is 2 feet. So the minimum outlet...
I'm not trying to make anyone guess, but I had several different equations I have been referred to that are orders of magnitude different.
1) Using the API 520 Relief Valve Discharge Reaction for Non-flashing liquid (F = W/366*sqrt(k*T/((k+1)*M)) +A*Po) I get a 15,725 lb resultant force. From...
Hello All,
We are installing new vertical turbine pumps on a river water intake structure. The client did not want VFDs so we have minimum flow recirculation lines off each pump that pipe back down into the river. The discharge of these recirc lines is below the river water level. I have talked...
