What to watch We use hair dryers almost every day, but we know very little about its working principle, so how is this kind of machine that can blow hair by itself when it is plugged in, how is it made, and what is its principle? Let's make a blower ourselves to find out~
The background of the blower
Metallurgy appeared in China 5,000 to 6,000 years ago. After entering the Iron Age in the 5th century BC, ironware became an important factor in promoting historical progress, and once became a symbol of the level of productivity development. Iron smelting is a combination of various technologies, and blasting technology is an integral part of it. The ancient blowing technology of metallurgical machinery has undergone the development from intermittent blowing to continuous blowing, and the blowing equipment has developed from leather to wooden fans and piston-type wooden bellows, and horse platoons and water platoons have also appeared in the meantime. The development of blasting equipment is not only an important part of the progress of iron smelting technology, but also affected by the overall level of mechanical technology as a kind of mechanical technology. China's iron smelting machinery has shown a unique development context under the combined effect of social, political, economic, technical level and other factors.
Application of blower
The conveying medium of the blower is mainly clean air, clean coal gas, sulfur dioxide and other inert gases. Other flammable, explosive, corrosive, toxic and special gases can also be produced and transported on demand.
Material
12V Motor with Fan Tubes Plastic End Plates Long Bolts Nuts Aluminum Housing Transformer Wood Brackets
Experimental procedure
1. Install the aluminum housing on the motor. 2. Fix the plastic end plate with long nuts and bolts. 3. Start the motor, the blower has blown out the air and started to operate. 4. Fix the blower on the wooden bracket and connect a permanent power supply (transformer) at one end. 5. Turn on the transformer switch, the blower can continue to work. Experimental principle
The prime mover drives the impeller to rotate at a high speed through the shaft, and the airflow enters the high-speed rotating impeller from the inlet axially, and then becomes a radial flow and accelerated, and then enters the diffuser chamber, changing the flow direction and decelerating. The kinetic energy is converted into pressure energy (potential energy), so that the fan outlet maintains a stable pressure.
Experimental expansion
At present, in all kinds of mechanical and electrical equipment in all walks of life, the motors supporting fans account for about 60% of the installed capacity of the motors, and the power consumption accounts for about one-third of the total power generation. It is particularly worth mentioning that most fans have the phenomenon of large horse-drawn trolleys during use. In addition, due to changes in production and technology, it is necessary to often adjust the flow, pressure, temperature, etc. of the gas; many units still use The backward way to adjust the air baffle or valve opening to adjust the gas flow, pressure, temperature, etc. This is actually by artificially increasing the resistance, and at the expense of wasting electricity and money to meet the gas flow regulation requirements of the process and working conditions. This backward adjustment method not only wastes precious energy, but also has poor adjustment accuracy, which makes it difficult to meet the requirements of modern industrial production and services, and has serious negative effects.
In recent years, with the rapid development of power electronic technology, computer technology, and automatic control technology, electric drive technology is facing a historical revolution, that is, AC speed regulation replaces DC speed regulation and computer digital control technology replaces analog control technology. trend. Motor AC variable frequency speed regulation technology is a main means to save electricity, improve process flow to improve product quality and environment, and promote technological progress.
