The burner is an important part of asphalt mixer, its normal operation directly determines whether the aggregate temperature can meet the requirements of production. Because there are many factors that cause the fault of the burner, the fault of the burner should be analyzed according to the working characteristics of the burner. When its fault occurs, according to its fault characteristics can quickly remove the fault, so that the asphalt mixer as soon as possible to resume production.
1. The shell
It is the main component of the mounting bracket and fresh air inlet channel of the burner. From the appearance, it can be divided into box type and gun type. Most high-power burners adopt split-type shell, which is generally gun type. The shell is generally made of high strength light alloy castings. The fire hole on the top cover has the function of observing the flame.
2. Fan motor
It mainly provides power for the operation of fan impeller and high pressure oil pump. Some burners also use separate motors to provide power for oil pump. Some low-power burners use single-phase motors with relatively small power, and most burners use three-phase motors. Only by rotating the motors in the determined direction can the burners work normally and drive the oil pump and the air blade.
3. Fan impeller
High speed rotation generates enough air pressure to overcome the furnace resistance and chimney resistance, and blows enough air into the combustion chamber to meet the needs of combustion. It is composed of cylindrical wheels with blades at a certain Angle, and its composition material is generally high strength light alloy steel. All qualified fan impeller have good dynamic balance performance.
4. Air gun fire pipe
It plays the role of guiding airflow and stabilizing wind pressure, and is also a part of the air inlet channel, which is generally connected with a jacket flange and the furnace mouth. It is generally made of alloy steel with high strength and high temperature resistance. It has the effect of wind speed regulation.
5. Damper controller
It is a kind of driving device that controls the equal-specific movement of damper baffle through mechanical connecting rod. Generally there are three kinds of manual regulation, hydraulic drive controller and servo motor drive controller. The former works stably and is not easy to produce faults, while the latter controls accurately and the variation of air volume is smooth.
6. Damper baffle
The main function is to adjust the size of the air inlet channel to control the size of the air inlet. Its constituent material has alloy, alloy baffle plate has a single, double, three, and other combination forms.
7. The diffusion plate
Also known as the steady flame plate, its special structure can produce rotating airflow, to facilitate the full mixing of air and fuel, but also regulate the secondary air volume role.
8. Ignition transformer
The electronic type and the mechanical (inductance) type are two conversion elements that produce high voltage output. The output voltage is generally 2 5KV, 26KV and 27KV, and the output current is generally 15~30mA. EDI, Danfoss, Domestic Danfoss, da these several. The difference between an oil engine and an air engine is that an oil engine generally has two heads and an air engine generally has one head.
9. Ignition electrode
The high-pressure electric energy is converted into light energy and heat energy in the form of electric arc discharge to ignite the fuel. There are generally monomer type and split type two. Generally, the ignition needle is made of stainless steel and can withstand 800 degree high temperature, while what we use is nickel chromium wire which can withstand 1500 degree high temperature.
10. Electric fire high voltage cable
Its function is to transmit electrical energy. It can withstand 1.5 million volts.
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