Hi, I am trying to solve a static structural problem in Ansys 17 but it gives me the error "An error occurred while starting the solver module. Please refer to troubleshooting section in Ansys mechanical user guide". I've checked all the possibilities in the mechanical user guide but nothing...
Hi everyone, we have a vertical pump (VS4 type) which has multiple bush bearings. During a previous overhaul, all bushes were renewed but when the pump was installed back, high vibration was recorded due to high bush clearances. Can anyone help me and provide me with a standard that mentions the...
Hi guys, I am looking to do my postgraduate at a good University in London and I am not a resident there therefore I am not sure about the reputation of the universities when it comes to Mechanical Engineering. I have done some research and I have shortlisted two Universities to do my MSc in...
Hi guys,
we are looking to buy a new horizontal overhung centrifugal pump and one of the suppliers have sent us the datasheet of a pump which puts the suction pressure at 0.30 barg, maximum suction pressure at 0.8 barg, and the vapor pressure of the liquid at 0.6 barg.
Now we know that if the...
Hi, a VS4 type vertical pump is having high vibration though the pump was recently overhauled. The pump bushes were replaced during the overhaul and the sleeve-bush clearance was 0.28 mm. The issue was that the pump manufacturer did not provide any design range for the bush clearances therefore...
Hi guys, During the run-out check of a pump shaft, how important is it to make sure that the two V-blocks are vertically at the same level. In other words, the shaft being check for run-out is perfectly horizontal.
Thanks.
Hi, we have large actuators to control the operation of 20 inch butterfly valves. These valves are discharge valves of large vertical pumps. So recently we had to replace the oil (around 150 liters) of the control unit of the actuator. After replacement of the oil, the valve funcionality was...
Hi, quite recently I saw a plunger type positive displacement pump which had a strange plug at the bottom of the casing. The plig seemed to be slighlty leaking while running. When I removed the plug l, I found that it is not a plug but a sintered bronze air filter. This air filter was on the...
Hi everyone!! I was wondering during a formula one race, does the temperature of the formula one car skin (body and wings) increase due to its moving at high speed??
Hi, I am a mechanical engineer and have been working in the maintenance sector for about 3 years now. Now, I am thinking of changing my career path and going for an MSc or MEng in computational science and engineering. I have always loved working with different software packages and solving...
Hi, lately, we at our company are having quite a lot of oil leakages in centrifugal pumps with deflector seals. Someone suggested that the reason of oil leakage through a deflector type seal or a bearing isolator could be a blocked oil breather. Is this true and how would a blocked breather on a...
Hi guys, in our company we have a FD fan which is supported by two pillow blocks (sleeve bearings). One is 'fixed' while the other is 'free'. I would like to know what is the difference between the two.
Also, quite recently we noticed that the color of bearing lube oil turned black. We tried to...
Hi, I am a Mechanical engineer with a Bachelors degree currently working in Maintenance. Now that I have almost completed 3 years in maintenance, I feel that I should move on and go for a Masters degree. Maintenance has taught me a lot about the basics including design and operation of...
So we have a centrifugal pump mechanical seal failure the other day. The mechanical seal leaked when the pump was stopped (Not immediately after stopping but after 1/2 an hours time. The leak was not severe and only a drop a second was seen leaking. The pump was started again to see if the seal...
Hi, if we are to remove an 8" gate valve or any other size gate valve from a pipeline, does the valve have to be in an open or closed position while removing? Logically it shouldn't make any difference but I've overheard from someone that it has to be in an open position since at closed position...
Hi everyone, We have a couple of steam turbines in our plant that are used to run multi-stage compressors. Now there are gear/spline couplings between each barrel of a compressor. My question is that what is the purpose of having large coupling floats of around 15 mm or more when the axial float...
Hi, Could someone help me as I am trying to figure out how does a sour oil trap of a centrifugal compressor work. The only information I have is that a sour oil trap basically removes the process gas trapped inside the seal oil and vent it (please correct me if I am wrong) and that it contains a...
Hi I am a maintenance engineer, been working with my company for a couple of years now. I was measuring the inner diameter of an LP seal ring (oil seal) the other day using a bore gauge for some clearance checks before installing the seals on a multistage compressor when suddenly I realized that...
Hi guys, I am new to the forum so forgive me if my query sounds silly.
I am trying to figure out how does a pilot valve control the hydraulic cylinder or the servomotor in a steam turbine. I tried to find a good article or explanation online but I am not able to find anything that explains the...
