Helical gears impose axial loads ie gears will try and push apart along the shaft axis. Thrust bearings are required to cope with these loads which reduces overall efficiency and adds cost. One major advantage of planetary gear sets is tangential shaft forces are minimised reducing bearing load and thus increasing power transmission efficiency.
@@wheelitzr2 Gearboxes with straight cut gears are stronger and more durable than ones with helical gears but the drawbacks are present like with everything. The noise they make is one reason why they're not used in road cars and another is the cost. But for performance applications the tradeoffs are worth it.
@@WRSomsky Or two gears are used on the same shaft; one left helix and one right helix, so axial forces cancel each other. But it's not really a design for car gearbox.
The beauty of the Prius drive PSD (Power Splitting Device) A single planetary gearset! Configured this way: Sun gear - Motor/Generator #1 Planet carrier - ICE (4cyl gas) Annular gear - Motor/Generator # 2
Helical gears have angled teeth so there are always almost equal pressure at some point of the gear which is perpendicular to teeth, which is not case in other one. Hope you liked the video.
How do you get to hell? Very simple: claim that you're innocent. How do you get to heaven? Very simple: Admit that you're not Innocent, you're guilty and ask for mercy. How to know if you're guilty or not? Simply: Compare your life to the Ten Commandments God gave you in the Bible. Everyone agrees that if people followed the ten commandments there would be no need for governments or police. Do not lie. Do not steal. Do not commit adultery. Do not insult God by using his name as a cuss word. There are six more but let's just leave it at that. How many lies have you told in your life? Have you ever taken anything that didn't belong to you? Jesus said, if you look at a women lustfully you've already committed adultery in your heart with that woman. How many times a day do you do that? Do you use God's name as a cuss word? Would you do that with your own mother's name? If you answer these questions honestly you know that you're guilty. God can justly punish you and send you to hell. Ask him for mercy. His name is Jesus. It's as simple as this, The Ten Commandments are called the moral law. You and I broke God's laws. Jesus paid the fine. The fine is death. Ezekiel 18:20 - "The soul who sins shall die. That's why Jesus had to die on the cross for our sins. This is why God is able to give us Mercy. Option A. You die for your own sins. Option B. Ask for mercy and accept that Jesus died on the cross for you.❤❤❤
Helical gears impose axial loads ie gears will try and push apart along the shaft axis. Thrust bearings are required to cope with these loads which reduces overall efficiency and adds cost. One major advantage of planetary gear sets is tangential shaft forces are minimised reducing bearing load and thus increasing power transmission efficiency.
This is only true with helical style gears. Straight cut gears do not have the tendency to push in the shaft direction
@@wheelitzr2 Gearboxes with straight cut gears are stronger and more durable than ones with helical gears but the drawbacks are present like with everything. The noise they make is one reason why they're not used in road cars and another is the cost. But for performance applications the tradeoffs are worth it.
That's where herringbone/double-helical gears come in. They balance the axial loads. en.wikipedia.org/wiki/Herringbone_gear
@@WRSomsky Or two gears are used on the same shaft; one left helix and one right helix, so axial forces cancel each other. But it's not really a design for car gearbox.
The beauty of the Prius drive PSD
(Power Splitting Device)
A single planetary gearset!
Configured this way:
Sun gear - Motor/Generator #1
Planet carrier - ICE (4cyl gas)
Annular gear - Motor/Generator # 2
It’s a brilliant piece of engineering
I love these videos that are short and to the point.
I already knew about it, but I found this video great anyways, and easy to understand. Great.
Hey thank you, make sure to checkout other videos too. 😄
Thank you for this, short, sharp and to the point. My brain has a block against understanding gears but videos like this help.
We are glad to hear that!
excellent video...
Thank you, we hope it was informative for you.😄
Thank you for the useful reminder to drink water. Most videos remind me to do something else that is not so useful or important.
We are glad 😃, keep watching.
Not many comments for 20K views?
Nice video, I'm going to watch a few more before deciding to subscribe.
Thanks.
Thank you, we are learning from every video and trying to make it better every time. Subscribe if we did give you and value. 😄
0:59 Ring gear is mislabeled as planetary gears. Great video!
Yes, we have noticed that, but this is the most viewed video and we have got good support so we can’t take this one down.
Hedgecutters use a similar system to convert axial rotation into oscillations
2 or more planetary gear sets are the foundation of an automotive automatic transmission
dengan disebar sebarkan ilmu pengetahuan saya, saya tidak akan jadi bodoh. Justru itu cara paling jenius
It was my understanding that straight cut gears are stronger and distributed load through the tooth evenly compared to helical but are noisy
Helical gears have angled teeth so there are always almost equal pressure at some point of the gear which is perpendicular to teeth, which is not case in other one. Hope you liked the video.
Turn the volume up
Noted.
I like the way he doesn't ask for likes ... just go and have some water.
It’s more important right?
4:39 Surprised 😂
But it is important 😉.
Anyone else find themselves drooling?
planetarygears as differential?
We will make explanation video on this topic soon
they are cool but not strong enough in high power application.
What is your opinion about better substitute?
Wait no planetary gear for bicycles? :P
Actually it is used in some bicycles’s hub. 😁
@@logiclab7 Sturmy Archer and Nexus use planetary gear sets.
Gearbox breaks cracked... 1U 1V 1Y 1N 1X
How do you get to hell?
Very simple: claim that you're innocent.
How do you get to heaven?
Very simple: Admit that you're not Innocent, you're guilty and ask for mercy.
How to know if you're guilty or not?
Simply: Compare your life to the Ten Commandments God gave you in the Bible.
Everyone agrees that if people followed the ten commandments there would be no need for governments or police.
Do not lie.
Do not steal.
Do not commit adultery.
Do not insult God by using his name as a cuss word.
There are six more but let's just leave it at that.
How many lies have you told in your life?
Have you ever taken anything that didn't belong to you?
Jesus said, if you look at a women lustfully you've already committed adultery in your heart with that woman.
How many times a day do you do that?
Do you use God's name as a cuss word?
Would you do that with your own mother's name?
If you answer these questions honestly you know that you're guilty.
God can justly punish you and send you to hell.
Ask him for mercy.
His name is Jesus.
It's as simple as this, The Ten Commandments are called the moral law. You and I broke God's laws. Jesus paid the fine.
The fine is death.
Ezekiel 18:20 -
"The soul who sins shall die.
That's why Jesus had to die on the cross for our sins. This is why God is able to give us Mercy.
Option A.
You die for your own sins.
Option B.
Ask for mercy and accept that Jesus died on the cross for you.❤❤❤