in front of you general form low-noise TsAGI fan (see Fig. 1). It consists of an electric motor, a housing and an impeller (impeller). The fan can be made without a case. But then it will not give such a powerful air flow. The fan diameter can be up to 400 mm.
If you have an electric motor and you know its maximum speed, then according to the graph (Fig. 2), it is easy for you to determine what maximum diameter you can make a fan.
So, you have decided to make a fan. Keep in mind that the noise of the entire installation is made up of the noise of the motor and the impeller. So if you want a quiet fan, then choose a quiet electric motor.
The fan impeller is made of metal, duralumin or steel sheet. The thickness of the sheet is selected depending on the diameter of the impeller in the range of 0.5-2 mm. How larger diameter impellers, the thicker the sheet should be taken.
First, unfold the impeller. The dimensions of this scan are shown in Figure 3. Here, the numbers indicate not millimeters, but fractions of the radius of the impeller blade. To obtain dimensions in millimeters, multiply the indicated figures by the selected radius of the fan impeller. Then give the blades of the impeller the desired profile - knock them out on a blank. Make a blank out of hard rock wood according to the dimensions shown in Figure 4. Here, the dimensions are also given in fractions of the radius of the impeller.
How to get such a blank? It is processed in three curved patterns. These templates are made from flat templates (Figure 5). You will find the bending radii of bent templates and the dimensions of flat templates in the table. Bent templates check the correctness of the manufacture of the blank in three sections I-I, II-II, III-III. Align the ends of the template arc with the corresponding vertical marks on the sides of the blank. Make sure that the axial risks on the templates and the blank are located in the same plane. Templates are easiest to make from tin. But any metal or plastic sheet will do, only the working edge of the templates must be made no thicker than 0.5 mm.
The working surface of the blank should be smooth and smooth. To do this, it must be thoroughly cycled and cleaned with sandpaper. Only after that it is possible to knock out the blades of the fan impeller on it. To prevent the impeller blank from moving during the drift, nail it in the center to the blank. And to increase the rigidity of the blades, after knocking them out at the root of the blade along the axis, make small indentations - ridges.
The sleeve for landing the impeller on the axis of the electric motor is machined on lathe, or made manually such as shown in Figure 6. The impeller with the sleeve are connected with rivets or screws.
When the fan impeller is assembled, be sure to balance it statically.
We have already said above that the fan can be made with or without a case. Figure 1 shows one of options hull structures. Other designs are also possible.
From time to time there is a need for a kind of fan, but small models cost relatively much. Do not rush to fork out, because small fan can be easily done with my own hands. In terms of efficiency, it is not inferior to purchased analogues, and its creation will require minimal amount materials.
Creating a fan from a cooler
The easiest way to make a fan yourself is to use an unnecessary cooler (these are used in a computer as a cooling system for components).
Not surprisingly, this method is the simplest, because the cooler is just a small fan. It remains only to make a few simple steps to give it its final shape and performance.
The cooler itself is quite functional, but you need to prepare it for non-standard way usage:
- Wires.
If the fan is located near the computer, an ordinary unnecessary USB cable will do. It needs to be cut and the insulation removed (same with the cooler wires):
We are only interested in two wires: red (plus) and black (minus). If there are other colors in the cooler or USB cable, feel free to cut them off and isolate them, because they are absolutely unnecessary and will only interfere.
- Compound.
After cleaning, the wires must be connected to each other (it is enough to twist them tightly with each other). Don't mix up the colors. This threatens with serious complications in the process of creating a fan.
For twisting, 10 mm length is enough. If necessary, clean most wires, it's not scary, but you have to isolate much more.
- Safety.
Remember that proper insulation is the key to success and a guarantee that the computer or outlet will not short out. Bare wires should be sealed with electrical tape (only in the absence of power), and the thicker it is, the better.
There is no particular point in explaining what threatens the fall of "minus" to "plus". If the red and black wires come into contact during the transmission of electricity, not only the USB wire / port, but also the computer components may burn out.
In principle, computers are not afraid of such moments if they are equipped with protection against voltage surges. But when a wall outlet is used, fixing the wiring in the apartment will be much more difficult than creating a small fan.
Therefore, seriously take care of the insulation of bare parts of the wires. Extra complexity is rarely needed.
- Final touches.
Do not forget that computer cooler very light, but at the same time very fast. Even with a voltage of 5 volts, its speed will be quite high. We consider this voltage for a reason: the cooler will perfectly cope with its task, and the operation will be as silent as possible.
Due to the small dimensions of the device, vibration and vibration may cause it to fall. This should not be allowed for the following reasons:
- such a cooler cannot cause lethal cuts even during operation, but there are no guarantees that the device will not jump up and fly off, for example, in the face;
- falling not on flat surface(on a pencil, pen, lighter) its blades can be damaged: fragments broken off at such a rotation speed can cause irreparable damage;
- other unforeseen circumstances.
Therefore, it is important to fix the cooler (with adhesive tape, glue) on some more stable surface: a box, wooden block, table.
- Additional functions.
If desired, the finished fan can be updated externally, add a switch (so as not to pull out the cord every time), etc. But attention is also paid to a method that relatively well increases the efficiency of the device.
Simply cut off the top of a plastic bottle and glue it (with a wide hole) to the cooler frame. Thus, the air flow will be more precise and directed: the force of air movement will be stronger by about 20%, which is a pretty good indicator.
This completes the creation of the fan, and it is ready for full-fledged work.
Disk fan
If the previous option does not suit you, and you want something more complex, then consider creating a fan yourself from computer disks:
- Engine.
Since we do not use a cooler, it is necessary to acquire some kind of motor that sets the blades of our future device in motion. In fact, you can use the motor of the already mentioned cooler of the cooling system, but this is too simple.
You should find or buy a motor with a certain part of it moving (for example, a protruding iron rod). Since we are making a fan from disks, then the presence of such a rod will the best option. Motors from an old VCR or player are also great, because they spin discs and cassettes - just what we need for a spinning propeller in our fan.
Do not use an engine washing machine or even a past fan - they are extremely powerful. Due to self-assembly of the structure, it will be very flimsy. A strong motor in the first few seconds will spread the fragments of the blades around the room and fly off the base.
If there is a running motor, it must be fastened with wires in the previously mentioned form.
With a running engine on hand, we need to concentrate on the disks, which are the main components of our fan. First, cut one into 8 equal pieces:
In order not to make a mistake during the procedure, you can pre-mark the disk with a pencil. It is best to use a soldering iron (there will be no sharp edges, it is safer), but regular scissors will work.
After that, the disk should be slightly heated with a lighter to make the material more pliable, and bend the wings in the manner of the blades, like conventional fans:
The same can be done with the usual plastic bottle:
In the center of our propeller you need to put a wooden bottle cap. If the size is too big - it can be planed.
- The rest of the parts.
As a center holding the entire structure, you can use a regular roll sleeve toilet paper:
It should be fixed in the center of the second disk, which will serve as the foundation for the fan. From above, you can place half of the second sleeve, as seen in the photo, so that the motor is inside it. On it you need to hang the blades from the disk / bottle.
The fan is ready to work. Optionally, you can add decorative elements to make the device look more presentable.
And you can see clearly how such a fan is made from a bottle in this video.
Additionally, it should be recalled that important points when creating a homemade fan:
- To fasten the parts to each other, you must use high-quality "superglue".
It is the one that cannot be peeled off even if desired. The entire structure must be as stable as possible and not succumb to vibrations and vibrations. Be responsible and glue everything you see, except for the blades and internal parts engine.
- Take your time.
You risk missing important detail, and this significantly increases the chances that something will go wrong during the operation of the finished fan. The consequences can be very serious.
- Don't use bad parts.
If you do not need the motor that is used to create the engine, its performance may be in doubt. Make sure it lasts for a while and will be effective.
Building an engine from scratch is a highly specialized process and requires good knowledge. Take care that the motherboards are in order, all the necessary connections are soldered well, etc. Better once again check what to do with another fan.
- Insulation.
We remind you once again: do not forget about the high-quality winding of wires with electrical tape. You should not save it, because short circuits and their repair will force you to sacrifice big expenses. Perhaps even in terms of money.
A hand-held fan is quite compact, efficient and does its job well. It is not difficult to make it if you take the procedure responsibly and follow the instructions. There are no restrictions on dimensions: if you feel strong, feel free to start assembling the fan bigger size.
In contact with
Throughout the long winter, we look forward to pleasant summer days, and with the onset of a hot season, for some reason, we begin to dream of coolness. How deliciously the light breeze created by a small homemade fan will help restore strength and relieve fatigue. Plus, making it is incredibly fun, right?
We suggest that you familiarize yourself with step-by-step instructions for assembling the simplest effective devices from literally junk starting materials. The article presented to your attention details how to make a fan with your own hands and what a home master will need for this.
At your disposal is a detailed description of the manufacture of options, the effect of which has been tested in practice. You can make such devices with your own hands, without having any experience at all. For a complete understanding of the information attached step by step photos and video instructions.
The simplest fan can be made from CDs. It can be used, for example, for local impact on a user who spends a long time at the computer.
Let's prepare the source materials for the work:
- CD discs - 2 pcs.;
- low power motor;
- cork from a wine bottle;
- wire with USB plug;
- a tube or rectangle made of thick cardboard;
- soldering iron;
- candle or lighter, hot glue;
- pencil, ruler, checkered paper.
For our purposes, you can use a motor from an old toy, for example, from a typewriter. As a cardboard tube, a sleeve from a roll of toilet paper slightly ennobled with decorative finishing paper is suitable.
The main advantage of this model is that almost any do-it-yourself lover can find all the materials that are necessary for its manufacture.
The process of assembling a mini fan is quite simple.
Let's take one of the CD disks and use a marker to divide its surface into eight identical sections. The easiest way to do this is to use a piece of squared paper.
Let's draw a cross on it from a horizontal and vertical line. Each of the four resulting right angles is divided in half. Using cells, this is quite easy to do.
Using a very simple method using a checkered leaflet, we can achieve a perfect layout of the disk into eight equal sectors.
We impose a disk on our drawing so that the intersecting lines are in the very center of its hole. Alternately applying the ruler to the lines diverging from the center, we make markings on the disk. So the sections will be the same.
To divide the disk into blades, you should draw a soldering iron along the marking lines from the transparent part to the edge.
Scissors can also be used for cutting, but there is a danger that the workpiece will crack during operation. If there is no soldering iron, you need to use a knife that has been preheated on the stove. When working with a soldering iron, welded plastic is formed along the edges of the cut, which is easily removed with a knife.
Cutting the disk with a soldering iron is the most effective method, at which the workpiece will not crack or deform, and the remnants of the deposited plastic can be easily removed with a knife
We heat the surface of the disk over the flame of a burning candle so that the blades can be slightly expanded. If there is no candle, a lighter or blow dryer will do.
The central part of the disk should be heated, and all the blades should be turned in the same direction. Placed in the opening of the disk wine cork. To better fix it, you need to pre-treat the edges of the hole with hot glue.
The USB cable must be connected to the motor. If we do not guess with the direction of rotation of the propeller, it will be possible to swap the occasions, that is, change the polarity.
The motor must be glued to the cardboard tube, and the tube itself to the second CD, which will act as the base of the stand.
When the plug is installed in the hole, the support of the second CD and cardboard tube, as well as the connecting device are already assembled, it is very important to correctly fit the propeller on the motor shaft
Now the propeller needs to be “landed” on the stem of the future fan. We will try to make sure that it is installed strictly in the center. You can fix it in this position with hot glue.
After completion of all work, the fan is ready for use.
Although the construction of this device will not take you much time, but the result of the work done will undoubtedly please you.
How to do the same, but a little more complex structure, including a regulator in the circuit, look at the video posted at the end of this article.
Do you find this homemade instructions complicated? Then you may be interested in information about and the rules for choosing them in order to purchase a ready-made appliance offered by manufacturers of household appliances.
Plastic bottle fan
What our craftsmen do from plastic bottles! It is time to say that the fan from them also turns out to be very good. It may not ventilate your entire room, but it will definitely help someone who is forced to work at a computer.
We offer two options for creating such a fan model.
Option #1 - hard plastic model
To do the job, we need:
- plastic bottle with a capacity of 1.5 liters;
- motor from an old toy;
- small switch;
- Duracell battery;
- marker;
- scissors;
- candle;
- hammer and nail;
- Styrofoam;
- hot glue gun.
So let's take an ordinary plastic bottle 1.5 liters with stopper. At the level of the label line, cut off its upper part. It is she who we will need to make the propeller. We divide the surface of the plastic blank into six parts.
We try to mark it so that we get equal sectors: the quality of the future device depends on this.
We cut the workpiece according to the markup almost to the neck. We bend the blades of the future propeller and cut off every second of them. We are left with a blank with three blades equidistant from each other. The edges of each of the blades must be rounded. We do it carefully.
To remove those parts of the blades that are closer to the neck of the workpiece, it is better to use a utility knife; do not forget to round the edges of the blades
Now we will need a small candle. We light it up. We heat each blade on it at the base in order to turn it in the direction we need. All blades must be turned in the same direction. We remove the cover from the workpiece and in its very center we punch a hole with a nail and a hammer.
We put the cork on the rod of a small motor. Such motors can remain from old children's toys. As a rule, getting them is not difficult. We fix the cork with glue.
Now you need to make a base on which the motor will hold. For this purpose, we take, for example, a piece of foam. We fix a rectangle on it, which can also be cut out of the foam packaging.
On the upper surface of this rectangle, our motor will be fixed, to which the propeller is attached. To do this, in the foam, you need to make a recess corresponding to the parameters of the motor.
Hot glue is used to fix the elements of the product. In its absence, other adhesives can be used. It is important that the mount itself is as reliable as possible.
Sitting at the computer in the summer, many people begin to suffocate from the heat, it's good if there is air conditioning, but it's not always convenient to turn it on. In this article, we will tell you how to do USB fan with your own hands, from a motor, a cooler and a small engine. Show the manufacturing process step by step instructions Let's highlight two of the simplest and most effective ways.
Making a fan with a computer cooler
To make a fan at home and not strain at all, we found this method on the open spaces of the network. The entire manufacturing process will take no more than 20 minutes, you can use old coolers or just buy a new one in the store, the price for them is now a penny.
First, we begin to prepare the cooler, it has two wires: red and black. We remove the insulation by 10 mm from each wire, there is even a device for stripping the insulation. The size of the cooler does not play a special role, of course, it is better if it is large, the wind flow will be stronger in the end. 
We begin the preparation of the USB wire, for this we cut off one half at the place of the main cut and remove all the insulation. We will get four wires: two black and two red, we also clean them. If the cooler has other green or white color cut them off, they just get in the way. Learn how to make your own thermoelectric generator.
In the end result, you need to connect the wires to each other, there can be several ways, the main thing to remember is color coding. Do not forget to isolate everything among themselves, the more isolation, the better. For convenience, the finished cooler can be installed in a regular shoe box, so it will be more stable. 
This is how the guys in the video suggest us to make a fan out of a cooler. The method is actually simple, we do not promise strong airflow, but working at a computer will become much more pleasant.
How to make a USB fan with your own hands using a motor
So, to make a fan from a disk motor and usb, we need more time, but this type of fan will look better. Everyone can make such a device, the main thing is to show a little desire and patience. 
First of all we have to make the blades for our fan, we recommend using a regular CD, it looks great and is quite easy to make. Also read interesting article where we make laser level.
Here the guys from the video show a really cool way. In a similar way, you can make a fan out of paper, but remember, the paper must be thick, it is optimal to use cardboard in general.
Hot. If I may say so, even too much. That is why you can think about how to make a fan. You will say that it can be purchased at the store. But, firstly, their cost increases significantly. Secondly, they are quickly dismantled and it is not always possible to find the necessary ones on store shelves. Therefore, several practical advice about how to assemble the fan. After all, it is quite possible to arrange even at home from available materials. Here are a couple of options.
How to make a fan based on an old cooler. If you have an old one, you can take it from there. Borrow a switch there as well. More to do homemade fan, you will need some kind of battery holder. There are many of them, you can take it from some broken toy or something else in the same vein. Of course, you will need the batteries themselves in the amount of several pieces. It remains to connect all these components together, and a simple fan will be ready. If you don’t want to bother with the holder, you can use a regular USB port to supply power. You can make a stand out of anything. It all depends specifically on your own imagination and what you have at hand.
You can, for example, make a stand out of an ordinary hard wire attached to something. It is not so important what materials will be used, but how stable the whole structure will be.
Another option, how to make a fan, may be useful for enthusiasts. Excellent tool for the manufacture will serve as computer disks. What else will be required? A motor from a simple toy, a cork left over from champagne, some kind of handy switch and a few batteries. We take the disk, and then we make as many cuts as we need the blades. It is necessary to leave about a centimeter to the inner edge. Then turn each of the blades slightly at an angle. It bends much better if the disk is heated, for example, over gas. Then you will need to insert a champagne cork into its center. If you make a small puncture in its center, for example, with an awl, you can easily attach the entire structure to some kind of pin. You will need to make a leg - absolutely any object in the form of a cylinder, which is able to accommodate batteries and wires, can act in its role.
You will also need to arrange the base for the entire unit - it can also be any, the main thing is that it is stable and can hold the structure on itself. It remains only to add a few additional tips - when cutting the blades, you need to ensure that each of them is approximately 45 degrees - eventually you will come out with about 8 pieces. The cork inserted into the center of the disk will need to be fixed with glue. In any case, the process should not cause you any difficulties.
If you have been thinking about how to make a fan, now you probably understand that it is very simple. Each of the proposed models is extremely easy to manufacture, and you will not need much time to create it. You don't need anything special, the above is enough. These fans are very handy and compact. You can put it on your desktop. Or, if there is such a desire, take it with you to the garage or to the dacha, where these devices will be cooling means. It is difficult to argue with the fact that they have a tangible advantage - after all, these, by and large, very useful things are collected from various rubbish.
As you can see, it is quite possible to make a fan on your own, from improvised materials, without bothering with going to the store and looking for a unit that suits you at an affordable price. Everything is much easier.
