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Selection of Roots blower: which is better, air cooling or water cooling?

Source: Roots blower manufacturer Released on: December 7, 2021 Hits:

Roots blower is mainly suitable for small cases with simple structure, convenient maintenance, low price and convenient operation. For example, it is good to use Roots blower for breeding and oxygenation, small sewage treatment plant.

Roots blower is composed of an impeller and a shell. The impeller is embedded on two leaf shafts, which are composed of a longitudinal axis and a driving shaft. Each shaft has an impeller, and each impeller is connected with three wings, called three leaves. The driving shaft and driven shaft will be compressed to the fixing of the bearing and the meshing of the gear. The impeller is processed by a precision CNC planer. The two impellers maintain a certain distance but collide with each other. Relatively speaking, there is also a certain distance between the impeller and the housing, and the rotating compression produces clean air.

Roots blower is characterized by a certain flow, which is seldom affected by pressure. The air flow is proportional to the speed, and it belongs to constant volume fan. Small floor area, simple installation, stable flow, no buffer tank required. The air does not contain water and oil, so it does not need to be filtered again. There is a gap of 0.2-0.4mm between the impeller and the housing, which is non-contact. There may be a trace of dust. The performance is stable, which can be used for many years and is easy to maintain.

Air cooling is also called air cooling. In other words, no other cooling method is required. When the pressure is low, the fan can be naturally cooled by air heat transmission. This type of cooling method is suitable for small Roots blowers with low pressure, simple structure and small working power.

Which is better, Roots blower air cooling or water cooling?

The overall structure of water-cooled Roots blower is more complex. When the fan pressure exceeds 80kpa, the Roots blower needs to be water-cooled. If the pressure is too high, the temperature of the fan is too high. If the fan works for a long time, the bearings and gears will be damaged. Reducing the temperature of water cooling helps to extend the life of the fan.

When the pressure of Roots blower is greater than 49kpa, water cooling is adopted, and air cooling is allowed when the pressure is less than 49. Whether water cooling or air cooling, the main purpose is to dissipate heat, so as not to overheat the fan and cause shutdown. So hot is the reason for air cooling or water cooling. How is the heat generated? The main reason is that the efficiency of Roots blower is not high. These include mechanical efficiency and volumetric efficiency.

1. The mechanical efficiency is related to the product structure and processing technology. Of course, manufacturers of different brands are different.

2. Volumetric efficiency, you should know that under the same pressure, the faster the speed, the higher the volumetric efficiency. Similarly, the rotor speed of different products is different. The advantages of high rotating speed are fast inlet and outlet, and fast exchange of cold air. Nature will not get hot. Therefore, the product shall be considered when investigating whether water cooling is required. At the same time, the use of water cooling will increase ancillary equipment, investment costs and maintenance costs will increase.

Text label: Roots blower

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