Due to some mental health struggles, (I'm doing so much better now) I'm taking my Machine Design II class into the summer as an incomplete. Its been a time trying to learn everything off of the textbook, and when I get confused random websites and scattered youtube videos. I was struggling HARD with this section for a few days before finding your video. I cannot say enough how grateful I am that this exists. I learn a lot better watching videos, and this is exactly what I need to stay on track to graduate on time. Thank you so much!!!
I'm from a remote area in North-east india. Studying mechanical engineering. My college professors are incapable of giving such high quality lectures, specially online during this covid times. So your videos are of great value to me. Thank you for sharing these with us. 🤗. Forever grateful to you 🙏💕
Man these are great. I ran out of money halfway through an ME program and have been on a mission to learn it regardless. I'm getting there one way or the other. Thank you.
Minor correction: the tabs on crankshaft bearings aren't what keep them from turning - it's the bearing crush that actually holds them in place once torqued down. The tabs are there just to locate the bearings in the correct orientation during installation.
I partially agree with you. Yes, it is primarily crush that is supposed to keep the inserts from spinning. It is interesting to me, however, that the direction of the tabs always seems to be set up to prevent spinning the direction that torque would be applied in service. I think it is a similar situation to bolt groups holding torsion between one member and another. It is supposed to be friction transmitting the torsion, and yet simultaneously, the bolts are available to transmit shear should there be some amount of slippage between the two members. That is my feel for it at least.
@@TheBomPE I think that's something that's done more out of convention than actual intentional design, as at this point there are some manufacturers that use main bearings without any tangs at all and most/all rod bearings are assembled with the tangs of the upper and lower halves on the same side.
If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks! www.gofundme.com/help-replace-my-2011-tablet-pc
sir, u said that sommerfeld number is used over petroff bcz the latter doesnt considers eccentricity of the journal, but same is the case with sommer also..please throw some light
The derivation of the Petroff equation sheds light on how the Sommerfeld number was established. The Sommerfeld number is used as the abscissa in a series of charts used to relate relevant dimensionless groups of variables for hydrodynamic bearings. These charts account for eccentricity and such. Please view the next lecture in this series if you'd like to see some examples illustrating how to use these charts along with the Sommerfeld number. ( Link: th-cam.com/video/U6MYvY0ST8Q/w-d-xo.html )
I primarily teach in the Mechanical Engineering program, but I also teach in our interdisciplinary freshman and sophomore program as well (called Living With The Lab).
Due to some mental health struggles, (I'm doing so much better now) I'm taking my Machine Design II class into the summer as an incomplete. Its been a time trying to learn everything off of the textbook, and when I get confused random websites and scattered youtube videos. I was struggling HARD with this section for a few days before finding your video. I cannot say enough how grateful I am that this exists. I learn a lot better watching videos, and this is exactly what I need to stay on track to graduate on time.
Thank you so much!!!
Your lectures have taken me through all my design units. Thank you!🙏
I'm glad I could help! Thanks for watching!
I'm from a remote area in North-east india. Studying mechanical engineering. My college professors are incapable of giving such high quality lectures, specially online during this covid times. So your videos are of great value to me. Thank you for sharing these with us. 🤗. Forever grateful to you 🙏💕
I'm glad my content was helpful! Thanks for watching!
Man these are great. I ran out of money halfway through an ME program and have been on a mission to learn it regardless. I'm getting there one way or the other. Thank you.
Glad I can help! Never give up!
This is how one should teach engineering...
I appreciate the positive review! I'm glad you liked it, and thanks for watching!
Minor correction: the tabs on crankshaft bearings aren't what keep them from turning - it's the bearing crush that actually holds them in place once torqued down. The tabs are there just to locate the bearings in the correct orientation during installation.
I partially agree with you. Yes, it is primarily crush that is supposed to keep the inserts from spinning. It is interesting to me, however, that the direction of the tabs always seems to be set up to prevent spinning the direction that torque would be applied in service. I think it is a similar situation to bolt groups holding torsion between one member and another. It is supposed to be friction transmitting the torsion, and yet simultaneously, the bolts are available to transmit shear should there be some amount of slippage between the two members. That is my feel for it at least.
@@TheBomPE I think that's something that's done more out of convention than actual intentional design, as at this point there are some manufacturers that use main bearings without any tangs at all and most/all rod bearings are assembled with the tangs of the upper and lower halves on the same side.
If you found this video useful, consider helping me upgrade the old tablet PC I use to create these videos! Thanks!
www.gofundme.com/help-replace-my-2011-tablet-pc
Great video!
Hi, which book are you following, please? Great classes btw
This was out of Shigley's Mechanical Engineering Design, 10th edition. Thanks for watching!
sir, u said that sommerfeld number is used over petroff bcz the latter doesnt considers eccentricity of the journal, but same is the case with sommer also..please throw some light
The derivation of the Petroff equation sheds light on how the Sommerfeld number was established. The Sommerfeld number is used as the abscissa in a series of charts used to relate relevant dimensionless groups of variables for hydrodynamic bearings. These charts account for eccentricity and such. Please view the next lecture in this series if you'd like to see some examples illustrating how to use these charts along with the Sommerfeld number. ( Link: th-cam.com/video/U6MYvY0ST8Q/w-d-xo.html )
Hello, In case bearing and crank shaft is fixed vertically, what will be load W or pressure P
Which major are you teaching?
I primarily teach in the Mechanical Engineering program, but I also teach in our interdisciplinary freshman and sophomore program as well (called Living With The Lab).
Where is this college?
I teach at Louisiana Tech University in Ruston, LA.
3:00 I am pretty sure air hockey tables are hydrostatic and not hydrodynamic
Nous sommes des fabricants de coussinets industriels
Coussinets broyeurs
Turbo compresseurs