What is the counter current cooling roots blower and what are the characteristics of its principle
The working principle of Roots blower determines that its exhaust temperature is high and increases with the increase of exhaust pressure. Therefore, the pressure rise is usually limited by the exhaust temperature. Roots blower The counter current cooling technology can effectively reduce the exhaust temperature of the fan, increase the exhaust pressure (within the allowable range of strength and stiffness), and expand the single stage Roots blower Application scope of. At the same time, it also reduces noise. With counter current cooling technology, the exhaust temperature of fan can be reduced by 20-30%, and the pulsating noise of fan can be reduced by 8-15%.
1. Special features:
When the counter current cooling system is used, the vibration is small and the noise is low. When counter current cooling system is used, it is suitable for high temperature and high pressure gas transmission. Supply the most suitable design at a low price. It is economical and economical.
Water treatment, pipeline cleaning, powder transportation, incinerator, sand blasting, coating, food material transportation. Fish farm oxygen supply, drying, grain transportation, powder transportation, chemical gas transportation, dehydration are widely used in all walks of life, occupying an irreplaceable position in the market.
It can absorb high temperature gas. When air cooling is used to absorb high temperature gas, it is usually necessary to cool the absorbed gas to about 40 ℃ by precooler. When countercurrent cooling is used, the gas temperature can even be directly absorbed at 120 ℃
2. It can be used under higher pressure ratio. Due to the influence of exhaust temperature and other factors, the pressure ratio of single-stage air-cooled fan is generally less than 2.0. When countercurrent cooling is used, the exhaust temperature decreases and the allowable pressure ratio increases. In practical application, the pressure ratio of single-stage blower and vacuum pump is about 2.6 and 4.4 respectively.
3. It can ensure the dry transportation characteristics. It can reach the vacuum degree that the wet vacuum pump can reach without water injection cooling.
Roots vacuum pump has been developed in China for about 100 years, but many manufacturers have encountered bottlenecks. Many manufacturers have encountered difficulties with fans above - 50kPa. They choose single stage bipolar or high voltage. The former is expensive, the latter is too hot. After more than one year's innovation and innovation, people have successfully developed a counter flow cooling vacuum pump. The main purpose of countercurrent cooling vacuum pump is to increase the pressure of single-stage roots vacuum pump to - 60 kPa, and the pressure of counter flow cooling roots blower to - 80 kPa or more, which solves the problems of high pressure and high temperature, and the price is higher than that of two-stage high pressure Roots blower It is much lower, which is a good choice for negative pressure and high pressure gas transmission.
Countercurrent cooling vacuum pump and Roots blower The production process is the same. The housing is also made of ht-250 cast iron. Before each fan leaves the factory, it is necessary to carry out the secondary finishing, dynamic balance test and impeller drilling to ensure that each impeller maintains a good clearance during operation. The main accessories of the fan are: Zhuzhou gear, the accuracy is grade 5. Taiwan tto oil seal. NSK orientation. Gates belt, USA.
Countercurrent cooling Roots blower It's not a wet vacuum pump. As shown in the figure above, counter current cooling is usually applied in two ways. A part of the gas is drawn out from the exhaust port of the blower or vacuum pump, and is introduced into the shell as high-pressure countercurrent gas after cooling. When the vacuum pump directly discharges the atmosphere, the atmosphere can also be directly introduced into the shell as cooling gas.
What is the counter current cooling roots blower and what are the characteristics of its principle http://theoxfordjazz.com/xw/156.html
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