We are all familiar with light bulbs, how do you get the tungsten filament there?

It is installed when the glass of the bulb has not been inlaid up, under normal circumstances, the worker will first make the bulb mouth above the bulb, and then make the glass after inlaying the tungsten wire, only need to take a mold to pour the bulb mouth into the glass, which is very convenient.

During the assembly process of the lamp, the part inside the lamp is made first. Like the bracket and filament and the core post underneath. Then we have a process called sealing, which is to fuse the inner core part and the glass of the outer bubble shell, and the last two parts are connected together.

How did the tungsten filament in the light bulb get in? After reading it, I have solved my doubts for many years.

When making the bulb, the tungsten filament is placed in advance. After all, it is made through an assembly line, so when making bulbs, the position of each bulb and the position of the tungsten filament will be determined to form the same batch of bulbs.

The tungsten filament is fixed with a glass tube and placed in the bulb.

The bulb base is fixed when it is installed, and then the base of the bulb is placed directly on the lampshade, and then the bulb is made.

1. When cooking, there is a lot of "white gas" in the kitchen - first a large amount of water vapor produced by water vaporization, and small water droplets formed by water vapor when it is cold and liquefied in the process of rising.

2. Cooking utensils such as spatulas, hand spoons, colanders, and aluminum pots are all made of wood or plastic - wood and plastic are poor conductors of heat so that they do not burn their hands during cooking.

3. When the car brakes (decelerates) suddenly:

1. The driver applies the brakes - the force is the reason for changing the motion state of the object.

2. Passengers will dump in the direction of the car - inertia.

3. The driver can brake the car with less force - the principle of leverage.

Fourth, the fountain pen absorbs ink is the use of atmospheric pressure, when absorbing ink, first squeeze the pen bag to remove the air inside, and then put the tip of the pen into the ink, let go of the hand, and the atmospheric pressure will press the ink into the pen bag.

5. Why can airplanes fly into the sky? Because the wings are subjected to upward lift. The streamline distribution of the air around the wing when the aircraft is flying refers to the asymmetry of the shape of the wing cross-section, the streamline above the wing is dense and the flow velocity is large, and the streamline below is sparse and the flow velocity is small.

From Bernoulli's equation, the pressure above the wing is small, and the pressure below is strong. This creates a lift force in the direction acting on the wing.

6. Tungsten filament for filament - tungsten filament has a high melting point and is not easy to melt at high temperatures.

When it comes to incandescent lamps, I believe everyone is familiar with them, and we all know that the patent owner of the electric lamp is Edison, who has been in use for 139 years since its invention in 1879, and the invention of the electric lamp has brought great convenience to people! However, when they see a lamp, many people wonder how the tungsten filament of the lamp is put in. We must know that Edison improved the light bulb and found tungsten filament as the filament in the light bulb, and the high temperature resistance of tungsten metal is very prominent.

However, tungsten metal that is resistant to high temperature must be under the condition of no oxygen!

Because when it is burned to incandescent temperature, it will turn into yellowish tungsten oxide when it encounters oxygen, which not only becomes brittle, but also loses its electrical conductivity. Therefore, when this tungsten filament burns it to shine in order to turn on electricity, there is no doubt that it must first be isolated from the air, which is why the bulb must be covered by a glass bulb! In addition, it is necessary to not only cover it, but also to remove the residual air in the bulb after covering, fill it with a gas that will not react with tungsten, and seal it well.

So, if there is no glass bulb covering, the filament can shine, but it will burn out quickly!

Everyone knows that whether this incandescent lamp can emit light or not is inevitably related to the tungsten filament inside, but it is not enough to have tungsten filament in it, and it also needs to have the fixation of the wick and the production materials such as conductive wire glass tubes. First of all, the glass tube should be melted at high temperature, and then made into the shape of a bulb, that is, a trumpet, and then the flare of the glass tube should be pointed upward, and both sides should be fixed, and then two conductive wires should be placed on both sides of the glass tube, and a wick should be placed in the middle of the conductive wire.

Then use a special heater to heat the bottom of the glass tube, and when it can be softened, then use a specific mold to pressurize and form, and then do heating and softening treatment at the top of the wick, install the tungsten guide wire buckle wire at the top of the wick, and buckle the tungsten wire on the tungsten guide wire, then the wick is done, and then fix the wick glass tube, buckle the glass shell, and then combine the bottom of the glass shell with the filament glass tube inside through the heater.

Then, the air inside is pumped into a vacuum by using a vacuum extraction device, inert gas is injected, and the excess wick part is blown at high temperature by the machine. In the end, it is to combine the lampholder with the bulb and finally seal the mouth, so that the bulb is made, I didn't expect the bulb to be very simple and clear from the outside, but it is so complicated to make. But the invention of the light bulb has a very long history, although the production process seems cumbersome, but it is only an assembly line thing, and the current tungsten lamp has almost been eliminated.

The invention of the electric light has brought great convenience to people, and sometimes when you look at this glowing bulb overhead, you think, how does the tungsten filament fit in the bulb?

How did the tungsten filament in the light bulb get in? After reading it, I have solved my doubts for many years.

The tungsten filament in the bulb is very resistant to high temperatures, but it must be in an environment without oxygen. After covering the lampshade, the air inside is pumped out, and then argon gas is filled in (because argon gas does not react with tungsten) and sealed.

The tungsten wire is connected to the electrode, so that the power generation link of the bulb can be completed, and there are few tungsten filaments in the current environmental protection bulb.

The tungsten filament in the bulb is first put into it, covered with the lampshade, and then vacuumed or added with inert gas.

Because tungsten filament has a high melting point.

Because the temperature of the filament is as high as more than 2000 degrees Celsius, at such a temperature, the general metal has been melted, only the melting point of tungsten is as high as more than 3400 degrees Celsius, and the stability of tungsten is also good, so the filament in the bulb is tungsten filament.

The invention of the electric light has brought great convenience to people, and sometimes when you look at this glowing bulb overhead, you think, how does the tungsten filament fit in the bulb?

Filament glow is a phenomenon in which non-combustibles become white-hot.

White heating is the state in which an object glows white when it is heated to 1200 1500.

Because tungsten filament has poor electrical conductivity.

The resistance is larger. In the case of equal power-on time.

More heat is generated.

It is enough for the tungsten filament to reach the desired temperature for white-hotting.

It will glow white as a result.

And because of the high melting point of tungsten filament.

Up to 2700 or more.

So it won't melt quickly when powered on.

Therefore, tungsten filament is used for incandescent lamps.