Thank you for the explanation, I took apart my air pump and tried to do some modification, but when I put it together,,,, surprise!!!! this will help to finish the job.
it's good explaining the outlet valve, but how and what exactly causes the inlet valve to close? is it really 90 degrees down? or does it have a slight angle to shut right away when it gets pressurised? What is needed to make the pump air tight, rubber? i was hoping to know a Little bit more details
Actually, air enters through the top on the DOWNWARD stroke. As the piston goes down, it leaves a vacuum drawing in air. As it travels back up, the air in the chamber simply remains where it's at. The piston does not force it back out the top due to the check valve opening, thus allowing the air to get around the moving piston.
@@wdjh3434 If you watch the animation, you will see that she claims that air enters the chamber from outside the pump on the upward stroke. This is incorrect. Air is already inside the chamber. It enters on the DOWNWARD stroke. While the piston is moving down, the air already inside the chamber gets pumped into the tire; while at the same time, air is entering the chamber at the top from the vacuum created above the piston on the DOWNWARD stroke. Can you see it?
@@townley1017 In her animation, she shows air entering from the outside as the piston rises. Bear in mind, the piston check valve is OPEN, thus there is zero force from the piston. That alone is sufficient proof that there is no transfer of air to the inside of the pump because everything is open to the atmosphere (same pressure). The piston is doing no work. She erroneously shows air entering from outside the pump as the piston RISES. Remember, there is no valve at the opening where the air enters; so what's causing the air to flow in?
ok so the trick is of two valves , one is the inlet and the other outlet, the pistion compresses the air, and the outlet stops the incming air from going back and air goes back into tyres
Not a complete description a pump I am afraid . Missing are the details of how the pump connects to the tyre valve and how it interfaces with the tyre valve .
You haven't explained why raising the piston causes air to enter the chamber - it does so because you are creating negative pressure by raising the piston, nature doesnt like this so air is drawn in. Also, why have you drawn the piston off-centre ? I've never come across a pump that hasnt had the piston in the centre of the chamber.
Thanks! This is helping me with my degree! Could you explain to me how a water hand pump works, i.e. how does the water from say a reservoir gets sucked and out into the outlet. Please explain in simple terms if you can. Thanks!
Thanks I want use exhaust air in to my motorcycle but as I was missing the one way valve it didn’t work but I’m sure after one way valve it will work. Thanks
If the piston is 1 square inch, the pressure needed from you is equal to the PSI of what you are inflating. Scale that for different sized pistons (smaller piston is easier but takes more strokes).
Nice explanation of the functioning parts though not entirely accurate. Unfortunately this video discloses nothing about the actual implementation of a pump. There is, obviously, no little valve on the piston (likely the leather washer that seals the piston also serves as a valve), nor is there a valve on the exit from the pressure chamber (if it were there, the tire would deflate into the tube when the pump was attached to the tire).
Hi...Very crystal clear presentation. I would like to give similar demonstration to my students. Can you please tell me that what is the animation software you used?
I'm wondering what happens in right side of the upper chamber? It's not told. Is it a separate airtight chamber? If yes, there will be great pressure changes as the piston moves, right? Too big for a person to handle? If yes, the animation is wrong.
Took pump apart. Did not find any inlet valve. I suspect the design of the pump plunger also functions as a valve, but ?? The outlet valve appears to be built into the end which attaches to the tire. This is not very efficient.
REALLY REALLY THANK U SO MUCH FOR THE VIDEO I HAS BEEN SEARCHING FOR THIS BUT FINAALY I FOUND ONLY ONE VIDEO OF BICYCLE PUMP WORKING I HAS DOUBT ABOUT THE VALVES HOW DOES THE VALVES CLOSE AND OPEN AUTOMATICALLY WITHOUT ANY MEDIUM CAN ANYONE EXPLAIN THIS PLZ.
I've noticed whenever I pump up my road tires that as the pressure gets higher it becomes more and more difficult to pump (my pump has a built in gauge). I'd assume that different pumps vary, but is this because you have to press down with the same amount of force as the pressure in the tire in order to push more air into it?
I know this is 2 years old but...... it's that your forcing more air into an already high pressure region, therefore you need more force to.....force the fresh air into the tire causing the pressure to go even higher. It's like blowing more and more air into a balloon. The closer you are to its maximum expansion, the harder it is to blow more air. This is why the balloon fails at a certain point (when it explodes) just like an over inflated tire. This relates to any type of tire and the recommendation that you only fill it to the recommended manufacturer tire pressure. If the pressure exceeds the safety limit, there is a possibility to have a blow out like you have in a car. Over inflated tires have a higher chance of blowing because they don't have as much displacement. when you go over a rock or some other type of obstacle, it will try to displace the air in the tire (this is saying that this obstacle for an instant placed an external pressure on the tire that caused it to be squeezed a little) and since the tire is full of air, there is no where for the air to go but to force the weakest part of the tire to tear thus causing a blowout.
thank you for the demonstration and illustrations.
Simple and visual! Clear audio and good pace talking! I love it! Thank you!
THANK U, I NEEDED THIS SO MUCH, OR I WAS GONNA FLOP ON MY SCIENCE PROJECT, I WOULD HAVE FAILED WITHOUT U, TYSM
That was probably one of the best explanations I have ever heard. It is so easy to follow and understand.
Thanks
Thank you for the explanation, I took apart my air pump and tried to do some modification, but when I put it together,,,, surprise!!!! this will help to finish the job.
hey man i must say that the effort taken by the person has paid off ........u have explained the topic very well ........thankssssssss
This is so very well explained that even kids can make their own bike pump at home....thanks for the good stuff
thx now i can jump ahead of all the students in my class.
it's good explaining the outlet valve, but how and what exactly causes the inlet valve to close?
is it really 90 degrees down? or does it have a slight angle to shut right away when it gets pressurised?
What is needed to make the pump air tight, rubber?
i was hoping to know a Little bit more details
Thank you so much for making this video. The audio/ your voice and the animations make it very easy for anyone to understand. Thank you so much
Actually, air enters through the top on the DOWNWARD stroke. As the piston goes down, it leaves a vacuum drawing in air. As it travels back up, the air in the chamber simply remains where it's at. The piston does not force it back out the top due to the check valve opening, thus allowing the air to get around the moving piston.
I think both work
@@wdjh3434 If you watch the animation, you will see that she claims that air enters the chamber from outside the pump on the upward stroke. This is incorrect. Air is already inside the chamber. It enters on the DOWNWARD stroke. While the piston is moving down, the air already inside the chamber gets pumped into the tire; while at the same time, air is entering the chamber at the top from the vacuum created above the piston on the DOWNWARD stroke. Can you see it?
@@jakejones5736 Yeah I can see it
@@jakejones5736hmm, not too sure about this
@@townley1017 In her animation, she shows air entering from the outside as the piston rises. Bear in mind, the piston check valve is OPEN, thus there is zero force from the piston. That alone is sufficient proof that there is no transfer of air to the inside of the pump because everything is open to the atmosphere (same pressure). The piston is doing no work.
She erroneously shows air entering from outside the pump as the piston RISES. Remember, there is no valve at the opening where the air enters; so what's causing the air to flow in?
I think, in case of bicycles, the outlet valve is not a part of pump, but is located in the tube's valve.
ok so the trick is of two valves , one is the inlet and the other outlet, the pistion compresses the air, and the outlet stops the incming air from going back and air goes back into tyres
What an excellent explanation! Thank you!
Not a complete description a pump I am afraid . Missing are the details of how the pump connects to the tyre valve and how it interfaces with the tyre valve .
You haven't explained why raising the piston causes air to enter the chamber - it does so because you are creating negative pressure by raising the piston, nature doesnt like this so air is drawn in. Also, why have you drawn the piston off-centre ? I've never come across a pump that hasnt had the piston in the centre of the chamber.
Nature is a bitch...hating on negative pressures
When piston rises then air enters always under the piston through valve.
Thank you so much for making this video ma'am.this help me a lot.
Thanks! This is helping me with my degree! Could you explain to me how a water hand pump works, i.e. how does the water from say a reservoir gets sucked and out into the outlet. Please explain in simple terms if you can. Thanks!
bro what degree?????
Look up the CZcams channel called "Practical Engineering"
I fucking love bike pumps
so nice explanation .. i understood each part very clearly .. wow
Excellent explanation and demo. Thanks much!
But how does the inlet valve open and close?
This is what am also wanted ask .
Many thanks for such a great video!
Thanks
I want use exhaust air in to my motorcycle but as I was missing the one way valve it didn’t work but I’m sure after one way valve it will work. Thanks
Can any one explain how inlet and outlet valve works ?
Automatically works based on the pressure difference. Eg: when piston rising then outside pressure is more than pressure under piston.
Nice explanation thank you.
Your video are awesome!
I learned a lot from it!
Th
ank you
yeah
yeah
Good Job!!
Why will be more difficult to inflate a ball as the number of strokes increases by using a hand pump?
If the piston is 1 square inch, the pressure needed from you is equal to the PSI of what you are inflating. Scale that for different sized pistons (smaller piston is easier but takes more strokes).
You should have 1 M subs
Nice explanation of the functioning parts though not entirely accurate. Unfortunately this video discloses nothing about the actual implementation of a pump. There is, obviously, no little valve on the piston (likely the leather washer that seals the piston also serves as a valve), nor is there a valve on the exit from the pressure chamber (if it were there, the tire would deflate into the tube when the pump was attached to the tire).
Hello, very informative
Hi...Very crystal clear presentation. I would like to give similar demonstration to my students. Can you please tell me that what is the animation software you used?
Good explanation. Thanks!
I'm wondering what happens in right side of the upper chamber? It's not told. Is it a separate airtight chamber? If yes, there will be great pressure changes as the piston moves, right? Too big for a person to handle? If yes, the animation is wrong.
Superb explanation 👍🏿
So does that mean that if my pump no longer works surely the internal compression area is damaged ?
More likely the leather washer on the piston wore out. Unless you smashed the pump, then your statement is correct.
Nicely explained
Took pump apart. Did not find any inlet valve. I suspect the design of the pump plunger also functions as a valve, but ?? The outlet valve appears to be built into the end which attaches to the tire. This is not very efficient.
good there is no any inlet valve but a washer which allows the air to enter but not to exit
I understood this more than in class
REALLY REALLY THANK U SO MUCH FOR THE VIDEO I HAS BEEN SEARCHING FOR THIS BUT FINAALY I FOUND ONLY ONE
VIDEO OF BICYCLE PUMP WORKING
I HAS DOUBT ABOUT THE VALVES
HOW DOES THE VALVES CLOSE AND OPEN AUTOMATICALLY WITHOUT ANY MEDIUM CAN ANYONE EXPLAIN THIS PLZ.
I fucking love bikes
Excellent explanation. Thank you
Thankyou🙏
very well explained. ty.
I've noticed whenever I pump up my road tires that as the pressure gets higher it becomes more and more difficult to pump (my pump has a built in gauge). I'd assume that different pumps vary, but is this because you have to press down with the same amount of force as the pressure in the tire in order to push more air into it?
I know this is 2 years old but......
it's that your forcing more air into an already high pressure region, therefore you need more force to.....force the fresh air into the tire causing the pressure to go even higher. It's like blowing more and more air into a balloon. The closer you are to its maximum expansion, the harder it is to blow more air. This is why the balloon fails at a certain point (when it explodes) just like an over inflated tire. This relates to any type of tire and the recommendation that you only fill it to the recommended manufacturer tire pressure. If the pressure exceeds the safety limit, there is a possibility to have a blow out like you have in a car. Over inflated tires have a higher chance of blowing because they don't have as much displacement. when you go over a rock or some other type of obstacle, it will try to displace the air in the tire (this is saying that this obstacle for an instant placed an external pressure on the tire that caused it to be squeezed a little) and since the tire is full of air, there is no where for the air to go but to force the weakest part of the tire to tear thus causing a blowout.
Tnx man.... I can finally complete my bicycle
good explanation ,thanx
Really thankful
Thankyou 🙏💕
Thanks
how the piston moves automatically upwards while pumping sometimes??????
Thanks was really helpful, but you got the spelling of tyre wrong😁
Different countries spell it differently, like color vs colour, same word but different spelling 👍
wonderful
Anyone who is here to know the working of Boyle law
good way of explanation,but need extra information like complete information of parts inside body of pump
This must have been the precursor to the combustion engine.
I just checked with wikipedia and pneumatic tires were developed after the invention, and first prototypes, of combustion engines.
thanks
one of the values is broken.
captions to copy?
thanks bro i dont have to do my science
❤😊
coucou
SALUT CA VA
ALLAH
le GRAND
ok....
Pronounce openly so that each listener can grab each word.Avoid styling in speaking.
bad vid
how the piston moves automatically upwards while pumping sometimes??????
probably the air pushing the piston up when the pressure builds up