Roots blower, also known as Roots blower, is a type of volumetric rotary blower. The following is a detailed explanation of the Roots blower:
1、 Working principle
The working principle of Roots blower is based on the relative motion of two bladed rotors (commonly two bladed or three bladed) inside the cylinder. Two rotors maintain a small gap during rotation to avoid contact and friction with each other. The meshing state between the two rotors is maintained through the synchronous gear at the rotor shaft end. Within the working volume formed by the concave surface of the rotor and the inner wall of the cylinder, gas is drawn in and compressed and delivered to the exhaust port during the rotation of the rotor.
2、 Characteristics
1. Simple structure: Roots blower has a compact structure, easy manufacturing, and convenient maintenance.
2. Stable performance: When adjusted within the allowable pressure range, the flow rate changes, exhibiting a wide range of pressure selection and forced gas transmission characteristics.
3. Pure conveying: Its conveying medium is pure and free of oil, suitable for occasions where gas purity is required.
4. Low vibration: The whole machine has low vibration and runs smoothly.
5. Noise: Gas dynamic noise that may be generated due to the gap between the rotor and cylinder, as well as gas pulsation. Three bladed rotors perform better in reducing noise and vibration compared to two bladed rotors.
3、 Classification
Roots blowers can be classified according to different standards:
1. According to the working mode, it can be divided into single-stage and two-stage series blowers.
2. According to structural form, it can be divided into vertical blower, horizontal blower, vertical shaft blower, dense group blower, etc.
3. According to the sealing type, it can be divided into labyrinth seal, expansion ring seal, packing seal, mechanical seal, etc.
4、 Application Fields
Roots blowers are favored for their unique performance and wide range of applications. It is mainly used for gas transportation and pressurization tasks in low-pressure environments, and can also be used as a vacuum pump. Specific application areas include but are not limited to:
1. Environmental protection industry: such as aeration systems in sewage treatment plants, used to accelerate the decomposition and oxidation of organic matter in wastewater.
2. Chemical industry: used for processes such as gas transportation and reaction gas participation.
3. Metallurgical and petrochemical industries: used to provide stable airflow to meet production needs.
4. Aquaculture: used for oxygenation and improving water quality.
5. Other industries such as cement, electricity, coal, food, pharmaceuticals, etc. also have extensive applications.
In summary, Roots blower is a type of positive displacement blower with stable performance and simple structure, playing an important role in multiple industries.
