1. Roots blower. Roots blower is a fan with constant capacity, and the air delivered is directly proportional to the number of revolutions. The three blade impeller is inhaled and discharged three times by two impellers. Compared with the two blade type, it has less gas pulsation, less load change, high mechanical strength, low noise and small vibration. Because the impeller rotates in the opposite direction at the same speed, a certain amount of gas surrounded by the box and impeller is transmitted from the suction side to the discharge side. The impeller is always in the correct phase through the synchronous gear, and will not contact with each other, so it can run at high speed, does not need internal lubrication, and has simple structure, stable operation, stable performance, and is suitable for a variety of functions. It has been widely used.
2. Centrifugal blower. The working principle of centrifugal blower is similar to that of centrifugal blower. The difference is that the air compression process is usually carried out by several working impellers (or stages) under the action of centrifugal force. When the motor rotates to drive the fan impeller to rotate, the gas between the blades in the impeller also rotates and is discharged under the action of centrifugal force. The velocity of the gas increases, so the kinetic energy of the gas is converted into static pressure energy in the process of flow. With the pressure of the fluid, the static pressure energy is converted into velocity energy, and the gas is discharged through the exhaust port, and a certain negative pressure is formed in the middle of the impeller. Since the inlet is negative pressure, the external air is immediately under the action of atmospheric pressure. In the case of continuous rotation of the impeller, gas supply, continuous discharge and supply, so as to achieve the purpose of continuous blowing. When the single-stage high-speed centrifugal fan works, the impeller is driven by the shaft to rotate at high speed. From the inlet shaft, the airflow enters the high-speed rotating impeller and becomes radial flow, which is accelerated, and then enters the diffusion chamber to change the flow direction and decelerate. The kinetic energy in the high-speed rotating air flow is converted into pressure energy (potential energy), so that the fan outlet maintains a stable pressure.
3. Rotary blower, the rotary blower relies on the eccentric rotor in the cylinder to run eccentrically, and changes the volume between the four blades in the rotor slot to inhale, compress and discharge air. During operation, the differential pressure of the blower is used to automatically transfer the lubricant to the dripper, and then drop it into the cylinder to reduce friction and noise, and prevent the return of gas in the cylinder.
The above is the principle of the blower, I hope to help you.
