Let me specify the project.
A compressor crank shaft is analysed for static loads. After doing FEM, I have set of values of Direct stresses both normal as well as shear and also a set of Von mises stresses for various location on the crank shaft.
Now I want to chech the margin of safety (how...
What is the criteria for comparing Von Misses Stresses with Yield or endurance stress?
How much factor of safety should be selected?
Are there any guidelines to select FOS?
I am engaged in a project that involves a portable oxygen vehicle for charging 350 bar oxygen into air craft (military application).
can soem body tell me about the precautions athat are necesaary for handling oxygen ?
Regards
Dear All
I am attempting FEM of a compressor crankshaft having ball bearings as main bearings.
Can some body help me in modelling the bearing?
What constraints are to be used for ball bearings (e.g. all dispacements blocked, all rotations are blocked ?)
I would be grateful if somebody can...
Thanks for the responses.
The ultra dry nitrogen is used in air craft for various purposes. (Tyre filling, Canopy opening, Missile charging Unit)
Hence connecting and disconnecting will be frequent.
Can someone suggest about hoses couplings with built in valves so that the gas inside the hose...
Dear All
Let me elaborate the situation.
My organisation is building a Nitrogen Geneartion and distribution trolley for aerospace application.
The concept is like this.
Nitrogen is generated from atmospheric air using the membrane technology. This nitrogen is boosted from 10 bar to 350 bar...
IN THE DAYS OF CONTINUEOUS LOAD SHADING FROM POWER SUPPLY AUTHORITIES IS IT POSSIBLE TO USE SOLAR ENERGY TO RUN A HOUSE WITH 5 KW CONNECTED LOAD?
CAN ANY BODY THROW THE LIGHT OF UTILITY OF SOLAR ENERGY FOR COMMON MAN WHO WILL BE INDEPENDANT ON STATE POWER SUPPLY GRID?
CAN SOMEBODY TELL ME ABOUT THE METHOD TO MAINTAIN A DEW POINT INSIDE CARBON STEEL CYLINDER AFTER ACHIEVING THE SAME BY USING A DESSICANT DRYER. ?
does material of construction of cylinder critical to storage of ultra dry nitrogen ?
what hose material is suggested for transfer of this ultra dry...
IT IS ALL DEPENDS UPON THE SUPPLY GRID STRENGTH. WITH ONLY THREE TERMINALS AT MOTOR END DIRECT ON LINE WILL BE THE ONLY ECONOMICAL OPTION. BUT IT IS TO BE ENSURED THAT THE COMPRESSOR MUST BE IN UNLOADED CONDITION. OTHERWISE THE STARTING CURRENT WILL LAST LONGER TIME. IT IS ALSO TO BE ENSURED...
TO ALL
WE ARE GOING TO INSTALL COMPRESSED AIR SYSTEM WHERE THE MOTOR OF 45 KW WILL BE DRIVEN BY VFD & IN CASE OF FAILURE OF VFD THE SAME MOTOR WILL BE RUNNING ON DOL. THE CURRENT MEASUREMENT WILL BE TALLIED IN THIS CASE DURING COMMISSSIONING. MY DOUBT IS WHETHER THERE IS ANY RESIDUAL HARMONICS...
IT IS OBSERVED THAT MOTOR HAS FAILED BY FLASH OVER IN THE STATOR. THE MOTOR WAS PROVIDED WITH TEMPERATURE SCANNER TO MONITOR & CONTROL THE WINDING TEMPERATURE. THIS PROTECTION COULD NOT WORKED. ANOTHER PROTECTION IS THROUGH MOTOR PROTECTION RELAY. HOWEVER THIS RELAY DO NOT COVER PHASE IMBALANCE...
