With the continuous development of the fan industry, the types of fans are more and more, the blower is one of the common types, to bring the basic ventilation effect, the blower in all aspects of the fan over other types of fans. So what is the working principle of a blower?
The common blower has the following working principle:
1.Rotary blower working principle::
The structure is delicate, generally consists of 6 parts such as motor, air deflector, blower body, air chamber, base (tank for two purposes), nozzle and so on. Eccentrically operated by a rotor offset from the cylinder, the air is inhaled, compressed and exhaled by the volume change between the four blades in the rotor slot. During operation, the pressure difference is utilized to automatically send the lubrication to the ignition oil, which falls on the cylinder to reduce the friction and noise and to avoid the gas backflow in the cylinder.
2.Centrifugal blower working principle.
The blower usually has a high-speed rotor, the high-speed movement of air driven by the rotor blades, centrifugal force so that the air from the involute shape of the shell flow to the involute blower outlet, high-speed airflow with a certain wind pressure. Fresh air enters the supplement from the center of the housing. In fact, a centrifugal blower operates similarly to a centrifugal ventilator except for air compression by centrifugal force. It usually passes through several working impellers.
By changing the performance curve of the fan itself or the external pipe network is the basic principle of fan adjustment. During operation, the operating point depends not only on its own performance, but also on the system characteristics. As the resistance of the pipe network increases, the pipe performance curve becomes steeper.
3. Roots blower working principle:
Roots blower is a positive volume type fan, which is proportional to the conveyed airflow and the number of revolutions. Compared with the two-bladed type, the three-bladed impeller sucks in and exhausts the air three times with two blades each time, with reduced gas pulsation, small load change, high mechanical strength, low noise and small vibration.
Simple to use, simple to maintain, low cost and long service life. Fan motor and impeller are directly connected, no gears for speed increasing device, no mechanical contact, no lubricating oil system, no wear and tear and energy loss, reduce maintenance cost, power transmission efficiency reaches more than 95%.
Each impeller is always kept in correct phase by synchronized gears to avoid contact phenomenon, so it can be high-speed, simple structure, no internal lubrication, smooth running, stable performance, adapted to a variety of uses, and has been used in a wide range of fields.
