Why is the pressure and flow of Roots blower high?

Roots blower is a positive displacement blower, which separates the air inlets through the 'engagement' of a pair of rotors. The rotors are driven by a pair of synchronous gears and move in the opposite direction, pushing the inhaled gas from the suction inlet to the exhaust outlet without internal compression. There is clearance between rotors without contacting each other. When the gas reaches the exhaust port, it is pressurized due to the backflow of high-pressure gas at the exhaust side, thus completing the gas transmission.

Roots blower is a displacement fan, and the air volume delivered is proportional to the number of revolutions. Two impellers suck and exhaust three times every time the three blade impeller rotates. Compared with the two blade type, the gas pulsation is small, the vibration is small, and the noise is low. There is always a small gap between the impellers on the two shafts of the fan and the hole surface in the elliptical housing, between the impeller end face and the front and rear end covers of the fan, and between the fan impellers. Under the drive of the synchronous gear, the air is transported from the fan inlet to the exhaust side along the inner wall of the housing. The fan cavity does not need lubricating oil, has simple structure, smooth operation, stable performance, and is suitable for many purposes, and has been used in a wide range of fields.

Roots blower is composed of five parts: casing, wallboard, impeller, oil tank and muffler.

Casing: mainly used for supporting (wallboard, impeller, muffler) and fixing.

Wall plate: mainly used to connect the casing and the impeller, support the rotation of the impeller, and play the role of end sealing.

Impeller: it is the rotating part of Roots blower, which is divided into two leaves and three leaves. However, due to the advantages of three leaves, such as less air pulsation, less noise, and more stable operation than two leaves, it has gradually replaced the two leaves Roots blower.

Oil tank: mainly used to store lubricating oil used to lubricate gears and bearings.

Muffler: It is used to reduce the noise caused by air flow pulsation during the inlet and outlet of Roots blower.

The working principle of Roots blower is that when the motor drives the driving shaft to rotate through the coupling or pulley, the gear installed on the driving wheel drives the gear on the driven wheel to rotate synchronously in the opposite direction, so that the engaged rotor rotates with each other, so that the casing and rotor form a space, and the gas enters the space from the air inlet. At this time, the gas will be compressed and squeezed out of the air outlet by the rotor, while the other rotor will turn to the position relative to the first rotor at the beginning of compression, forming a new space with the other side of the casing, and the new gas will enter this space again and be squeezed out, so as to achieve the purpose of blowing continuously.

Due to the adoption of the three blade rotor structure and the reasonable structure at the inlet and outlet of the housing, the fan has low vibration and noise. The impeller and shaft are designed as a whole, so the impeller is not worn, and the fan performance will remain unchanged, so that it can operate continuously for a long time. In addition, the fan has large volume utilization rate, high volume efficiency, compact structure and flexible installation mode. After more reasonable selection of bearings, the service life of each bearing can be uniform, thus extending the service life of the fan. The fan oil seal can be made of fluororubber, which can resist high temperature, wear and prolong service life.

Roots blowers are more and more widely used in most industries. Here is a brief introduction of their main application fields.

Application in water treatment industry: Roots blower is used in water treatment industry to supply oxygen for biochemical reaction. In the use of sewage treatment, Roots blower can supply quantitative oxygen and promote the oxidative differentiation of microorganisms according to different water depths and different tonnage of treated water.

Application of desulfurization and oxidation: desulfurization of flue gas is based on chemical methods. In this chemical reaction process, sulfur dioxide becomes crystal and crystallizes. The process requires the oxidation effect of oxygen. Roots blower is used to supply enough oxygen to ensure the efficient operation of chemical reaction.

Conveying of dust materials: Roots blower can not transport gas containing medium, but only suitable for conveying clean air. In terms of powder conveying, it is required to transport non sticky powder, which is mainly used to supply power and kinetic energy, and transport the required powder to the designated place.

Application of aquaculture: Roots blowers are mostly used for industrial aquaculture. Aeration disks are placed at the bottom of the pool. After the Roots blowers are connected, oxygen will be continuously supplied to the pool to improve the oxygen content of the pool. Use a blower to blow air into the breeding pool, add dissolved oxygen content in water, accelerate the oxidation and differentiation of some harmful substances, promote water purification, and promote the growth of fish farming products.