Four masses A,BC,D are completely balanced.masses C and D makes angles of 90 and 195 respectively with B in the same sense.The rotating masses have following properties: Mb:=25kg,Mc:=40kg,Md:=35kg ra=150mm,rb=200mm,rc=100mm,rd=180mm planes B and C are 250 mm apart .determine: (1) The mass A and its angular position.(2) The position of planes A and D.
Your welcome 😊... We also have more videos related to your interested topics. Here is the link for whole playlist: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html Check out these videos, it will be helpful for your exams. And if you have any doubts then comment us...
Sir please please if see my comment ASAP sol this Q PLEASE ASAP A shaft carries four masses A,B,C,D of magnitude 200, 300, 400, 200 kgs respectively and eccentricity of 80, 70, 60, 80mm in planes measured from A at 300, 400, 700 mm. Angles between cranks measured anticlockwise are A to B is 450 , B to C is 700 , C to D is 1200 . Balancing masses are to be placed in X and Y. Distance between A-X=100mm ,X-Y=400mm and Y-D=200mm. If balancing masses revolve at E=100mm, find their magnitude and angular position by graphical approach.
For angle, the variation of 5 to 10 degrees is ok... And for the value of mass, the variation can't be said properly, because it depends on different types of Numericals. But don't wry brother, you should complete whole Numerical, you will definitely get marks for method, force polygon, couple polygon, filling the table, etc...
A four wheel cylinder oil engine is in complete primary balance. The arrangement of reciprocating masses in different planes is as follows. Distance between A,B,C&D is 1.3m , 2.8m,1.3m in order from left to right. Masses being 380kg , 2m kg , 590 kg & 480 kg respectively. Assume C as horizontal . Determine the reciprocating mass of cylinder B & relative crank position. The stroke of each piston piston is ‘2r’ mm. How to solve this sir?
This is a numerical in which angles are not given. So first of all watch this numerical: th-cam.com/video/kZ7Vf8xEttU/w-d-xo.html You have to do somewhat similar like this but few things are different like radius is not given here so take radius as "r" bcz stroke length is given "2r". Also you have to take mass C in horizontal direction. Here all the forces & couples will be in terms of "r" but don't worry, finally "r" will get cancelled while finding unknown mass from the resultant of force polygon
Hi Ganesh, here is the link...D'ALEMBERT'S principle: th-cam.com/video/eIRo5S6kyG0/w-d-xo.html Energy method: th-cam.com/video/hgkLEJL67s8/w-d-xo.html We have more videos on numericals also, so check the playlist....it will be beneficial to you
Anubhav, the closing side of force polygon indicates the resultant unbalance force in that direction (skip this video at 12:34 minutes, here od indicates the closing side means od is a resultant unbalance force). Now we have to provide the Balancing mass in the opposite direction of resultant unbalance force, so that we can balance the system and so we have to provide unbalance mass in do direction... That's why we have to draw the mass "a" in downward direction and not upward direction.
Thank you Nikhil, check out more videos in the playlist. That will definitely help you and don't forget to comment us if you have any doubts. Thank you.
in which direction we have to draw lines .like while drwawing CD in force polygon ,you draw it inward .you can also draw it upward ..why didnot you ????
We have to draw according to the space diagram (or according to the angular position of masses). In space diagram, mass b is towards right side so we have to draw OB on right side,mass c is in upward direction so we have to draw BC in upward direction. Simillarly mass d is in downward direction so we have to draw CD in downward direction.
Your welcome Suraj, Check out more videos on Dynamics of machinery from playlist. It contains important videos of balancing and vibration portion, hope it will be helpful to you. th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
Glad to help you brother... Here is a whole playlist: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html You can refer this playlist if you have doubts in any topics. All the best for your exams 👍
We suggest you to prefer graphical method for these types of sums as it reduces the calculation work and it is short compared to analytical method. There will be chances of human errors while doing calculation on calculator... So comparatively you will get correct ans. by doing graphical method only.
@@EducationLessons but same kind of question was asked in analytical method only diff was that mass b was given and we need to find a, c, d masses however they were equally spaced and radius was same for all can you suggest the method for the same? How to approach this?
Please Watch this theory, you will get idea regarding the analytical method th-cam.com/video/2dMR48mC61s/w-d-xo.html This link is of theory, and same procedure you have to do for Numericals also... Hope this helps you.
Your welcome 🙂 Check more videos in the playlist: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true Comment us if you have any doubt
Hume minimum non zero value ko 1cm Lena hai, minimum non zero Matlab minimum to honi chahiye lekin zero nahi honi chahiye. Now think from your given values, 1.2 and 1.08 In dono me se konsi value minimum Hain lekin zero nahi Hain? Obviously it is 1.08, so you have to take 1cm = 1.08 kg m² Let's take other example, suppose you have four values, say 25, 30, -10 and 0. Ab in values me se konsi value minimum Hain lekin zero nahi Hai??? The answers is "-10"....so we have to take 1cm = 10 kgm² Hope your doubt is cleared 👍
Dont worry brother...In that case, the whole procedure is same only. In general Numericals without firing order...we just draw the polygons in the order 1-2-3-4 But when firing order is given like 1-3-4-2, then you have to draw the polygon in 1-3-4-2 order.
Sure, we have those videos too. Static and dynamic balancing: th-cam.com/video/x_XbXQRFM8o/w-d-xo.html Balancing of masses in same plane: th-cam.com/video/KHh20xFGyig/w-d-xo.html Balancing of masses in different planes: th-cam.com/video/Na_Fb7MHBLw/w-d-xo.html You can check more videos in the playlist on our channel: It includes theories on balancing and vibration as well as it's numericals. Here is the link: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true Comment us if you have any doubts.
Thanks Aryan Khan Check out more videos from playlist and share to the needy students who really needs these video lectures. th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
Thanks for appreciating our work. You can check more important videos in playlist...here is the link: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true
You can visit our website for important questions related to Dynamics of Machinery (includes both - Balancing and Vibration) Here's the link : engineeringlessonsmadeeasy.wordpress.com/important-questionspdf/
In such case, you will have one of the value of couple in terms of x. So first of all you have to draw the couple polygon. Now from the resultant of couple polygon, you will get the value of x.
Read the question properly shubham... Apko ek unknown mass bhi find Karna hoga. Jo plane me unknown mass rehta hai usi plane ko hum reference plane Lete hai Sab numericals me
![Balancing of Reciprocating Masses [Part-1] (Dynamics of Machinery)](http://i.ytimg.com/vi/EOdU5SkIbxo/mqdefault.jpg)
![Balancing of Reciprocating Masses [Part-1] (Dynamics of Machinery)](/img/tr.png)
![Numerical:(Without Angle)Balancing of masses rotating in different planes [DOM/TOM]](http://i.ytimg.com/vi/kZ7Vf8xEttU/mqdefault.jpg)
RAC-IMPORTANT QUESTIONS_QUICK REVISION (pdf):
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Bhai, in couple polygon, you took 'A' at the starting point of c' and 'D' at the end point of c'. Why? Can't we do otherwise?
Four masses A,BC,D are completely balanced.masses C and D makes angles of 90 and 195 respectively with B in the same sense.The rotating masses have following properties:
Mb:=25kg,Mc:=40kg,Md:=35kg
ra=150mm,rb=200mm,rc=100mm,rd=180mm
planes B and C are 250 mm apart .determine: (1) The mass A and its angular position.(2) The position of planes A and D.
This is same type of numerical...only few values are different. The whole procedure remains same as it is in this video.
Wonderfully Explained. Great job. Thanks alot!
Your welcome 😊...
We also have more videos related to your interested topics.
Here is the link for whole playlist:
th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
Check out these videos, it will be helpful for your exams. And if you have any doubts then comment us...
sir jis planeko reference plane consider kiya ho us planeko space diagramme horizontally lena jharuri hai?
I really appreciate your efforts ....
Thank you so much for your kind help ....
Your welcome 😊✌
All the best for your exams.
Sir, GYROSCOPE aur GOVERNOR par video lectures available hongi kya?
Sir please please if see my comment ASAP sol this Q PLEASE ASAP
A shaft carries four masses A,B,C,D of magnitude 200, 300, 400, 200 kgs respectively and eccentricity of 80, 70, 60, 80mm in planes measured from A at 300, 400, 700 mm. Angles between cranks measured anticlockwise are A to B is 450 , B to C is 700 , C to D is 1200 . Balancing masses are to be placed in X and Y. Distance between A-X=100mm ,X-Y=400mm and Y-D=200mm. If balancing masses revolve at E=100mm, find their magnitude and angular position by graphical approach.
Thank you very much
how to decide first drow couple or force poligun
Great explanation sir.Thankyou so much sir your explanation is too good 👌👌👌💕💕💕💕💕
Most welcome.. Visit educationlessons.co.in for more.
Sir plz u have to solve some more such complicated problems...
I practice but not getting same mass and angle as you or book so how much change in angle & mass allowed in exam ?
For angle, the variation of 5 to 10 degrees is ok...
And for the value of mass, the variation can't be said properly, because it depends on different types of Numericals.
But don't wry brother, you should complete whole Numerical, you will definitely get marks for method, force polygon, couple polygon, filling the table, etc...
A four wheel cylinder oil engine is in complete primary balance. The arrangement of reciprocating masses in different planes is as follows. Distance between A,B,C&D is 1.3m , 2.8m,1.3m in order from left to right. Masses being 380kg , 2m kg , 590 kg & 480 kg respectively. Assume C as horizontal . Determine the reciprocating mass of cylinder B & relative crank position. The stroke of each piston piston is ‘2r’ mm.
How to solve this sir?
This is a numerical in which angles are not given.
So first of all watch this numerical: th-cam.com/video/kZ7Vf8xEttU/w-d-xo.html
You have to do somewhat similar like this but few things are different like radius is not given here so take radius as "r" bcz stroke length is given "2r". Also you have to take mass C in horizontal direction.
Here all the forces & couples will be in terms of "r" but don't worry, finally "r" will get cancelled while finding unknown mass from the resultant of force polygon
Brother how much deflection allowed in exam for angle & mass ?
Sir Jo rtu me previous questions ata hai uska numerical karao n
Sir, vibration ka 5 method hai na o sikhao na(energy method , Lagrange,D'Alember ....)
Hi Ganesh, here is the link...D'ALEMBERT'S principle: th-cam.com/video/eIRo5S6kyG0/w-d-xo.html
Energy method: th-cam.com/video/hgkLEJL67s8/w-d-xo.html
We have more videos on numericals also, so check the playlist....it will be beneficial to you
sir iss ques me mass a ko kiu upar ke side nhi banaye hai
Anubhav, the closing side of force polygon indicates the resultant unbalance force in that direction (skip this video at 12:34 minutes, here od indicates the closing side means od is a resultant unbalance force).
Now we have to provide the Balancing mass in the opposite direction of resultant unbalance force, so that we can balance the system and so we have to provide unbalance mass in do direction...
That's why we have to draw the mass "a" in downward direction and not upward direction.
Sir u have drawn d' from c and a from o in couple polygon how we can draw sir
This video is really good.... keep it up guys ..
Thank you Nikhil, check out more videos in the playlist.
That will definitely help you and don't forget to comment us if you have any doubts.
Thank you.
in which direction we have to draw lines .like while drwawing CD in force polygon ,you draw it inward .you can also draw it upward ..why didnot you ????
We have to draw according to the space diagram (or according to the angular position of masses). In space diagram, mass b is towards right side so we have to draw OB on right side,mass c is in upward direction so we have to draw BC in upward direction. Simillarly mass d is in downward direction so we have to draw CD in downward direction.
thank u very much sir,
aur videos upload karo,
related with (BE, MECH)
Your welcome Suraj, Check out more videos on Dynamics of machinery from playlist. It contains important videos of balancing and vibration portion, hope it will be helpful to you.
th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
Very helpful
Happy to help you brother 🙂
You can check out more videos from this playlist
th-cam.com/play/PLwpA_XrwdvgZqTZQ7FoqutMxxB5KerAsE.html
Tomorrow is my paper and i was struck with same problem. Thanks!!
Glad to help you brother...
Here is a whole playlist: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
You can refer this playlist if you have doubts in any topics.
All the best for your exams 👍
@@EducationLessons can you tell the solution by analytical method! Asap
We suggest you to prefer graphical method for these types of sums as it reduces the calculation work and it is short compared to analytical method. There will be chances of human errors while doing calculation on calculator... So comparatively you will get correct ans. by doing graphical method only.
@@EducationLessons but same kind of question was asked in analytical method only diff was that mass b was given and we need to find a, c, d masses however they were equally spaced and radius was same for all can you suggest the method for the same? How to approach this?
Please Watch this theory, you will get idea regarding the analytical method
th-cam.com/video/2dMR48mC61s/w-d-xo.html
This link is of theory, and same procedure you have to do for Numericals also...
Hope this helps you.
Yup I have exam tomorrow how do you know ....bro ...
Thank you very nice your understanding
Your welcome 🙂
Check more videos in the playlist:
th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true
Comment us if you have any doubt
Thanks..blood. ..🤙🤙
Sir ji scale ka smz nhi aa raha agr couple ki values
1.2, 1.08 to in dono main se konsi value non zero hai
Hume minimum non zero value ko 1cm Lena hai, minimum non zero Matlab minimum to honi chahiye lekin zero nahi honi chahiye.
Now think from your given values, 1.2 and 1.08
In dono me se konsi value minimum Hain lekin zero nahi Hain?
Obviously it is 1.08, so you have to take 1cm = 1.08 kg m²
Let's take other example, suppose you have four values, say 25, 30, -10 and 0.
Ab in values me se konsi value minimum Hain lekin zero nahi Hai???
The answers is "-10"....so we have to take 1cm = 10 kgm²
Hope your doubt is cleared 👍
Without radius Ka problem please
thank you sir
Sir plz upload video of BALANCING OF 4 STROKE MULTI CYLINDER IN LINE ENGINE (1-3-4-2)....
We have that video on our channel
Here is the link for that video:
Numerical: Multi-cylinder Inline Engine
th-cam.com/video/qamC65NZfBA/w-d-xo.html
Engineering Lessons thanx sir
Engineering Lessons sir but what about the arrangement of firing order in engine like 1-3-4-2...
Dont worry brother...In that case, the whole procedure is same only.
In general Numericals without firing order...we just draw the polygons in the order 1-2-3-4
But when firing order is given like 1-3-4-2, then you have to draw the polygon in 1-3-4-2 order.
Engineering Lessons
Thanx sir..
Thank you Sir.....
Your welcome ...😊✌
Sir i need to study basics of balancing
Sure, we have those videos too.
Static and dynamic balancing: th-cam.com/video/x_XbXQRFM8o/w-d-xo.html
Balancing of masses in same plane: th-cam.com/video/KHh20xFGyig/w-d-xo.html
Balancing of masses in different planes: th-cam.com/video/Na_Fb7MHBLw/w-d-xo.html
You can check more videos in the playlist on our channel:
It includes theories on balancing and vibration as well as it's numericals.
Here is the link: th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true
Comment us if you have any doubts.
Sir heat transfer Ka vedio banao
Thanks a lot 👏
Your welcome Sumit Shelar😊✌
Stay tuned for more videos...
DOM IMPORTANT QUESTIONS-QUICK REVISION (pdf)
drive.google.com/file/d/1Tb82RKOnA1mlfaU8mxQBdAC6si2ytVem/view?usp=drivesdk
RAC-IMPORTANT QUESTIONS_QUICK REVISION (pdf):
drive.google.com/file/d/13NEp_yotA7N1NY0vfnE_RVH0rBqbjrun/view?usp=drivesdk
Grt sir❤️
Thanks Aryan Khan
Check out more videos from playlist and share to the needy students who really needs these video lectures.
th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html
Thanks
Nice video
Thanks for appreciating our work.
You can check more important videos in playlist...here is the link:
th-cam.com/play/PLwpA_XrwdvgZdUjaiINtHxzw_wIdfO52_.html&disable_polymer=true
Sir 6 kg/m = 3 cm how???
Set square chalana Bata sakte ho sir plz
Set square is used to draw perpendicular from a point to a line
To provide vtu questions dec2017/jan2018 of mass balancing .
You can visit our website for important questions related to Dynamics of Machinery (includes both - Balancing and Vibration)
Here's the link :
engineeringlessonsmadeeasy.wordpress.com/important-questionspdf/
mxm anivimbhi nge information
Sir aap ka video clear dikh nhi raha hai
How to solve if onlay X is find ???? Plz ans mee
In such case, you will have one of the value of couple in terms of x. So first of all you have to draw the couple polygon. Now from the resultant of couple polygon, you will get the value of x.
Couple polegon kis refrence se draw kru
Plz ek problem solve krke doo bhai
Read the question properly shubham... Apko ek unknown mass bhi find Karna hoga. Jo plane me unknown mass rehta hai usi plane ko hum reference plane Lete hai Sab numericals me
Okkk ty...reaction wale problem ka video banao RL or RM rhta heee
Ye to graphical method ki hi tarah tha
abe bhai achha padhate ho lekin awaj itni dhiri h,,, or last me faltu ka music daal dete ho itna tej///
DOM IMPORTANT QUESTIONS-QUICK REVISION (pdf)
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