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What are the working principles of blowers?

Views:6     Author:Xicheng Ep Ltd     Publish Time: 2021-08-26      Origin:Xicheng Ep Ltd

With the continuous development of the fan industry, there are more and more types of fans. The blower is one of the most common types. It has the advantages of saving power, reducing energy consumption, and saving production costs. Users have used, in addition to the blower itself can bring the most basic ventilation effect, the blower also surpasses other types of fans in all aspects. So what are the working principles of the blower?


General blowers have the following working principles:


1. Working principle of rotary blower:


The rotary blower has an exquisite structure and generally consists of six parts: the motor, the air transition device, the blower body, the air chamber, the base (and the oil tank), and the drip nozzle. The blower operates eccentrically on the rotor offset in the cylinder and changes the volume between the four blades in the rotor slot to suck in, compress, and discharge air. During the blower operation, the pressure difference is used to automatically send lubrication to the drip nozzle, drip into the cylinder to reduce friction and noise, and keep the gas in the cylinder from returning.

PP fan design drawings

2. Working principle of centrifugal blower:


The blower usually has a high-speed rotating rotor. The high-speed movement of the air is driven by the blades on the rotor. The centrifugal force causes the air to flow in the involute-shaped casing along the involute to the fan outlet. The high-speed airflow has a certain degree of Wind pressure. Fresh air enters and supplements from the center of the cabinet. In fact, the working principle of a centrifugal blower is similar to that of a centrifugal fan. The difference is that the air is compressed under the action of centrifugal force, usually through several working impellers.

PP fan impeller

By changing the fan's performance curve or the characteristic curve of the external pipe network, it is the basic principle of blower adjustment. The operating point of the blower during operation depends not only on its own performance but also on the system's characteristics. When the resistance of the pipe network increases, the pipeline performance curve will become steeper.


3. Working principle of Roots blower:


Roots blower is a fixed-volume blower. The air volume delivered is proportional to the number of revolutions. Compared with the two-blade type, the three-blade impeller uses two blades to inhale and exhaust three times each time. The gas pulsation becomes less and the load The change is small, the mechanical strength is high, the noise is low, and the vibration is also small.


Each impeller is always kept in the correct phase by a synchronous gear to avoid contact, so it can be high-speed, and has a simple structure, does not require internal lubrication, runs smoothly, and has stable performance. It is suitable for a variety of purposes and has been used in a wide range of applications. field.

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