What is the blower used for
time：2022-10-19
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The function of the blower is to accurately convey a certain amount of air volume, which is generally used for combustion supporting and air supply of boilers. The blower is generally used for air pumping, such as ventilation of large and small warehouses, and is used in every industrial sector such as metallurgical industry, chemical plants, organic fertilizers, petrochemical industry, food, decorative building materials, crude oil, mining, textiles, gas stations, powder transportation, wastewater treatment, etc.
Introduction to blower
The blower, also known as the fan, is a motor that uses rotating impellers. Modern blowers are motors that convert electric energy into air kinetic energy. The blower operates eccentrically by the rotor offset in the cylinder, and changes the volume between the blades in the rotor slot to suck in, compress, and eject air.
Working principle of blower
The working principle of the centrifugal blower is similar to that of the centrifugal fan, except that the air compression process is usually carried out by several working impellers under the action of centrifugal force. The blower has a high-speed rotor, and the blades on the rotor drive the air to move at a high speed. The centrifugal force makes the air flow to the fan outlet along the involute in the involute shaped casing. The high-speed air flow has a certain air pressure.
Characteristics of blower
The blower is an ideal pneumatic conveying air source for chemical, food and other industries because the impeller runs in the machine body without friction and lubrication, so that the gas discharged is oil-free; The blower is a volume operated blower. When it is used, the flow changes little with the change of pressure, but the flow changes with the speed. Therefore, the selection range of pressure is wide, and the flow can be selected to meet the needs by selecting the speed.
Type of blower
Roots blower
Roots blower is a positive displacement blower and a rotary blower. It uses two or three blade rotors to make relative motion in the cylinder to transport gas. Due to the continuous rotation of the rotor, the extracted gas is sucked into the air between the rotor and the pump housing from the air inlet, and then discharged through the exhaust port. The gas has no internal compression process through Roots blower.
Magnetic suspension blower
The magnetic suspension blower is a kind of turbine using magnetic suspension bearings. Its main structure is that the blower impeller is directly installed on the extension end of the motor shaft, while the rotor is vertically suspended on the active magnetic bearing controller. It does not need the speed increaser and coupling. It is a single-stage high-speed centrifugal blower directly driven by a high-speed motor and speed regulated by a frequency converter. Its core is magnetic suspension bearing and permanent magnet motor technology.
Multistage centrifugal blower
Centrifugal blower, also known as turbine blower, can realize continuous air supply by increasing the pressure and flow rate of gas under the action of rotating impeller. Its working principle is that when the motor rotates to drive the fan impeller to rotate, the gas is thrown out and changes the flow direction under the action of centrifugal force, the kinetic energy is converted into static pressure energy, and the gas is discharged from the exhaust port. At the same time, a certain negative pressure is formed between the impellers, so that the external gas is replenished under the action of atmospheric pressure, To achieve the purpose of continuous blowing.
Development of blower
After entering the Iron Age in the 5th century BC, iron became an important factor to promote historical progress and once became a symbol of the level of productivity development. Iron smelting is a combination of various technologies, and blast technology is an indispensable part of it.
In ancient China, the metallurgical mechanical blast technology experienced the development from intermittent blast to continuous blast, and the blast equipment developed from leather Ligularia to wooden fan and piston type wooden bellows, during which horse row and water row also appeared. The development of blast equipment is an important part of iron smelting technology progress, and at the same time, it is affected by the overall level of mechanical technology as a kind of mechanical technology.
In the early Bronze Age, more primitive blast equipment has appeared. According to archaeological excavation materials, China has used smelting equipment with a furnace equipped with four blowers as early as the Western Zhou Dynasty. In addition, it can be inferred from a large number of bronzes unearthed in the Shang and Zhou Dynasties and their technological level that there should be a more primitive blast equipment at that time.
The real iron smelting blast mechanical device should have been developed with the progress of iron smelting. During the Spring and Autumn Period and the Warring States Period, the concept of machinery appeared. That is to say, the ancients believed that machinery was a device that "works more with less effort".
