Portable Blower is mainly composed of the following six parts: motor, air filter, blower body, air chamber, base (and fuel tank), drip nozzle. The blower operates eccentrically on the rotor offset in the cylinder and changes the volume between the blades in the rotor slot to suck in, compress, and discharge air. During operation, the pressure difference of the blower is used to automatically send the lubrication to the drip nozzle and drip into the cylinder to reduce friction and noise, while keeping the gas in the cylinder from returning. This type of blower is also called a sliding vane blower.
1 device history
Fans, blowpipes, and bladders, the earliest appliances used for forced air blowing were fans and blowpipes. Ancient Egyptian goldsmiths used blowpipes with pottery nozzles, and the Incas sometimes used 8 to 12 copper pipes to blow at the same time. Later, a blast skin bag made of animal skins was invented. Both ends of the bag were equipped with air ducts and air inlets controlled by the operator. This kind of simple blower is still used in some areas in modern times. The image of a pot-shaped foot blower is already painted in the murals of the tomb of Rekhmir (c. 1450 BC) of the Eighteenth Dynasty of Egypt. When the air enters, the operator pulls the skin bag with a rope and then steps on it to blow the air into the furnace. Each furnace is equipped with four blowers, and two people operate opposite each other.
2 Equipment characteristics
⒈Ventilation blowers because the impeller runs in the machine body without friction and does not need lubrication so that the exhaust gas does not contain oil. It is an ideal pneumatic conveying gas source for chemicals, food, and other industries.
⒉The blower is a volume operation blower. When in use, with the pressure change, the flow rate changes very little. But the flow changes with the speed. Therefore, the pressure range is very wide, and the flow rate can be selected by selecting the speed to meet the needs.
⒊The speed of the blower is high, the gap between the rotor and the rotor, the rotor, and the body is small, so there is less leakage and the volumetric efficiency is higher.
⒋The structure of the blower determines that its mechanical friction loss is very small. Because only the bearing and gear pair have mechanical contact on the material selection, the rotor, casing, and gear ring have sufficient mechanical strength. Safe operation and long service life are a major feature of blower products.
⒌The rotor of the blower has been checked for static and dynamic balance. The finished product runs smoothly with minimal vibration.
⒍The blowers with the above characteristics mainly include Roots blowers, side flow blowers, and multi-stage centrifugal blowers.
3 classification introduction
According to the pressure of the fan, the fan can be divided into a low-pressure fan, medium pressure fan, and high-pressure fan.
Low-pressure and medium-low-pressure fans are mostly used in ventilation projects.
It can be divided into a centrifugal fan, axial fan, and water treatment blower;
According to the bearing technology, it can be divided into the general mechanical bearing blower, magnetic suspension blower, and air suspension bearing blower.