Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts

Thursday, January 23, 2020

Poppet Valve


We just learned about the Ball Valve.

Another type of valve is the Poppet Valve.

This is a valve that is usually used to open and close for gas to come through.

In a car's engine there are valves used to help the fuel come in, and after it makes a big explosion there are valves to let the burnt up air out.



(from: wikipedia - poppet valve)


Kid Facts - Blast from the past: Bell X-1

Thursday, January 16, 2020

Ball Valve


We just learned about the Valve Trim.

There are a lot of different kinds of valves.
One type of valve that is used a lot is the Ball Valve.

It's called a ball valve because inside the valve there is a ball.
The ball has a hole in the middle of it, and the valve handle turns the ball.
When the ball is turned one way, the water or gas can go through the hole in the ball.
When the ball is turned the other way, the ball blocks the water or gas, and keeps the valve closed.



(from: wikipedia - ball valve)


Kid Facts - Blast from the past: World War II Rocket Weapons

Thursday, January 9, 2020

Valve Trim


We just learned about the Valve Spring.

Another part of the valve is the Valve Trim.

The valve stem, seat, disc and any parts that are inside the valve are all together called the Valve Trim.


(from: wikipedia - valve)


Kid Facts - Blast from the past: The Rocket into Planetary Space - Hermann Oberth

Thursday, January 2, 2020

Valve Spring


We just learned about the Gasket that helps keep a valve from leaking.

Another part of a valve is the Valve Spring.

Some valves use a spring to keep a valve closed, but if there is a lot of pressure they will squeeze and let the disc open and let some pressure out.
Once enough pressure is let out, the spring will push the disc closed again.


(from: wikipedia - relief valve)


Kid Facts - Blast from the past: Le Prieur Rocket

Thursday, December 26, 2019

Gasket


We just learned about the Valve Stem that sticks up from the valve.

Another part of a valve is the Gasket.

This is a small circle that goes inside any place where two pieces of a valve have to be connected.
So at the top where the bonnet goes is sometimes a gasket, and then where the ports connect to other pipes is sometimes a gasket.

It's a way to help make sure that the liquid or gas doesn't leak out through where the two parts are connected.

Sometimes they're made out of rubber, but other times they're made out of paper or even metal.


(from: wikipedia - gasket)


Kid Facts - Blast from the past: De Laval Nozzle

Thursday, December 19, 2019

Valve Stem


We just learned about the Valve Seat.

Another part of a valve is the Valve Stem.

This is the part that sticks up out of the valve, and is used to help open and close the valve disc which lets gas or water go or stop.

There is a valve stem on a bicycle tire that sticks out.
If you hook a pump up to the valve stem, it will push in a pin which will allow air to go in or come out.


(from: wikipedia - valve stem)


Kid Facts - Blast from the past: Nell Rocket - Robert Goddard

Thursday, December 12, 2019

Valve Seat


We just learned about the Valve Disc.

Another part of a valve is the Valve Seat.

We know that the holes where the water or gas come in are the ports, and that the part of the valve that closes those holes is the disc.
The part of the valve that touches the disc and makes it a tight seal so nothing can get through is called the seat.


(from: wikipedia - valve)


Kid Facts - Blast from the past: L'Astronautique - Robert Esnault-Pelterie

Thursday, December 5, 2019

Valve Disc


We just learned about the Valve Handle.

Another part of the valve is the Valve Disc.

Inside the valve body is the part that moves to open or close to control the water or gas coming through.

There are a lot of different types of discs, that move in different ways to open up and close.


(from: wikipedia - valve)


Kid Facts - Blast from the past: Tsiolkovsky Rocket Equation

Thursday, November 28, 2019

Valve Handle


We just learned about the Valve Port.

Another part of a valve is the Valve Handle.

To open or close a valve, you can turn the handle one way or another.
This is just like the faucet that you use on a sink or a water valve outside the house.

There are a lot of types of valve handles.
The one on the faucet outside the house is usually a wheel handle that spins around.
The handle on the sink faucet is usually some kind of lever handle.
The handle underneath the sink that connects to the water line is usually a T shaped handle.

Some valves don't have handles because they are automatically opened by some other type of machine.


(from: wikipedia - valve)


Kid Facts - Blast from the past: Jules Verne - From the Earth to the Moon

Thursday, November 21, 2019

Valve Port


We just learned about the valve Bonnet.

Another part of a valve is the Valve Port.

This is the part of the valve that lets water or gas in or out.
They can have as little as just two ports, but many valves have more.
Some valves even have up to 20 ports!

Simple two port valves are just open or closed.
Other valves with a lot of ports might have a few open and others closed depending on how it is set up.


(from: wikipedia - valve)


Kid Facts - Blast from the past: HMS Erebus Rockets

Thursday, November 14, 2019

Bonnet


We just learned about the Valve Body.

Another part of a valve is the Bonnet.

This is on top of the valve body, covering up the inside of it.
The bonnet can be taken off the top to open up the valve and fix it.


(from: wikipedia - valve)


Kid Facts - Blast from the past: Congreve Rockets

Thursday, November 7, 2019

Valve Body


We just learned about the Valve.

There are a lot of parts to a valve that make it work.
Most of the parts of the valve inside of it that you can't see are all together called the Valve Body.

Inside the valve body are the parts of the valve that open and close to let gas or liquid through.


(from: wikipedia - valve)


Kid Facts - Blast from the past: Mysorean Rockets

Thursday, October 31, 2019

Valve


We just learned about the Cam.

Another part of moving things like machines is a Valve.

This is something that opens and closes to let air or water in or out.
We use valves every day, like when we turn on the water to wash hands.

Turning the water on opens the valve, and you can usually open it a little or a lot.
Then turning the water off closes the valve.


(from: wikipedia - valve)


Kid Facts - Blast from the past: Great Art of Artillery, the First Part

Thursday, October 24, 2019

Cam


We just learned about the linear actuator.

Another type of actuator or moving machine is a Cam.

A cam is a disc usually on a rotor that is spinning around.
The disc is mostly shaped like a circle, but it as a part that sticks out like a bump.
The circle disc is called the camp plate, disc cam or radial cam.

When the rotor spins around, that bump part of the cam can push down on something like a shaft or a pole.
Machines can use this to push those shafts down over and over again.
So every time the rotor spins around, it pushes the shaft down and then back up.


(from: wikipedia - cam)


Kid Facts - Blast from the past: Lagari Hasan Çelebi

Thursday, October 17, 2019

Linear Actuator


We just learned about the Rack and Pinion gears.

Another type of thing used in machines is a Linear Actuator.

The word actuator really just means "mover" and there are lots of types of actuators out there.
Linear means moving in a straight line.

So a linear actuator is a type of machine that moves something in a straight line.
We learned before about rotors that spin around in circles in electric motors.
So this is different because it might be moving a rod up or down, back or forward but in a straight line.

Sometimes this is done by having a bolt or screw that has lines on it, and then a nut spinning around on the screw that makes the screw go up and down.
This is a roller screw linear actuator.


(from: wikipedia - linear actuator)


Kid Facts - Blast from the past: Bellifortis Rockets

Thursday, October 10, 2019

Rack and Pinion


We just learned about the Air Gap in a motor.

Another type of thing used in machines is the Rack and Pinion.

A pinion is a gear, which we learned is a circle with teeth on the end.
The rack is a long flat line that has teeth on it, that match up with the gear.

When the gear spins around, it goes along the rack one way or the other.
These can be used as pinion wheels for something like a train that goes along a rack track, or sometimes as a pinion wheel that climbs up and down a pole that has a rack on it.


(from: wikipedia - rack and pinion)


Kid Facts - Blast from the past: Shock Diamond

Thursday, October 3, 2019

Air Gap


We just learned about the Electromagnet.

Another part of the electric motor is the Air Gap.

We learned that the rotor is the part that spins around in the middle, and the stator is the part that is wrapped around it.

The very small space between the rotor and the stator is the air gap.

The smaller the air gap, the better the electric motor will work, but it also needs to be enough space that the rotor won't hit the stator as it is spinning around.


(from: wikipedia - electric motor)


Kid Facts - Blast from the past: Multistage Rocket

Thursday, September 26, 2019

Electromagnet


We just learned about the Windings.

Another part of an electric motor is the Electromagnet.

An electromagnet is a bunch of wire wrapped around a pole, and the wire has electricity going through it.
The electricity and the winding of the wire creates an invisible field that can be used to charge or move metals.

In an electric motor, the electromagnet is what helps spin the rotor around inside the stator using electromagnetism.


(from: wikipedia - electromagnet)


Kid Facts - Blast from the past: Lift

Thursday, September 19, 2019

Windings


We just learned about the Stator in an electric motor.

Another part of an electric motor is the Windings.

These are the metal wires that are wrapped around the stator or the rotor.
They are wrapped in loops around and around, and when electricity goes through these wires it creates something called an electric or magnetic field that can spin the rotor around.

This works kind of like magnets that can move metal without even touching them.


(from: wikipedia - electric motor)


Kid Facts - Blast from the past: Air Resistance

Thursday, September 12, 2019

Stator


We just learned about the Rotor shaft that spins inside an electric motor.

Another part of an electric motor is the Stator.

This is the circle hole that the rotor goes into when it is spinning.

Usually the stator has something like an electromagnet in it that is used to make the rotor spin around.
The stator doesn't move, and the rotor spins around inside it.


(from: wikipedia - stator)


Kid Facts - Blast from the past: Ballistics