Roots blower can also be used in winter, and can be used in the environment of minus 30 degrees Celsius. Pay more attention to the use of roots blower in winter. Low temperature environment and high temperature environment will damage the roots blower, so we should pay more attention to:
When Roots blower is used in summer and winter, the inspection density of the blower should be increased from 1 to 2 times a day to 3 to 4 times. In case of failure, the blower should be shut down for inspection.
For water-cooled Roots blower, attention shall be paid in winter to prevent the water-cooling pipe from freezing or cracking, and the water inside the water-cooling pipe shall be cleaned when it is shut down. In summer, the inlet air temperature of Roots blower is generally controlled below 40 ℃. If the temperature exceeds this temperature, the Roots blower may be overheated and the motor is easy to burn.
The low temperature in some areas may also be related to altitude. If the altitude is high and the temperature is low, special attention should be paid to the selection of Roots blower. The selection cannot be carried out according to normal conditions. Altitude has an impact on air volume and pressure. The general type roots blower is mainly placed above the ground, and the ambient temperature will affect the roots blower and shorten its service life. Therefore, it is better to build a fan room to effectively control the ambient temperature and protect the roots blower.
Generally, the higher the pressure of Roots blower is, the higher the temperature is, and the higher the speed is, the higher the temperature is. Normally, every increase of 20kpa will increase 1.1 ℃, and every increase of 200 rpm will increase 0.9 ℃. In addition, the larger the fan is, the higher the temperature will be.
If the temperature of the gas we transport exceeds 40 ℃, such as saturated steam with high temperature, the requirements for the fan will also be increased, such as stainless steel material, anti-corrosion treatment for the fan, replacement of sealing method, cooling of bearing and oil tank, etc., which requires special treatment before use.
Similarly, why the temperature of fans of the same model produced by different manufacturers is different depends on the adjustment of clearance, the quality of bearings, and so on! The normal operating temperature range of Roots blower is 30-90 ℃, and the outlet temperature of blower is proportional to the pressure. Our calculation method for the body temperature of Roots blower: room temperature+10 ℃ temperature rise for every 1000 mm water column rise (within this range, it is the normal value, and if it exceeds this range, it means that the temperature of Roots blower is too high).
The factors affecting the outlet temperature of Roots blower mainly include: the volume efficiency of the blower, the working pressure, the internal leakage of the blower, and the temperature of the suction air. The high temperature of Roots blower is an abnormal phenomenon, which will cause many adverse effects on the blower itself, or even shutdown, thus affecting the work of the whole system. How to avoid high fan temperature can be started from the following aspects:
1、 Piping. The pressure holding of the pipeline is the factor that is easy to cause the fan temperature to be too high. According to different diameters of Roots blower, the main pipes at the air outlet are all fixed numbers. If the pipes with special requirements change the diameter manually, it is easy to cause pressure holding. In terms of aquaculture, it is often easy to have thin main pipes. To change the diameter of the main pipes, corresponding treatment must be done to ensure the normal outlet pressure of the blower.
2、 Working environment. According to the normal design standard, the fan should be operated in the fan pump room, but according to the author's years of experience, most roots fans are operated in the open air. In summer, the impact of environmental factors is more obvious. If conditions permit, the site can be equipped with refrigeration and cooling equipment to avoid the impact of environmental factors on the fan as far as possible, or equipped with sound insulation cover with heat dissipation device.
3、 Configuration of fan. The pressure and air volume of the fan are certain, but it often happens that small horses pull large cars, that is, small motors with large fans. In this way, in order to meet the flow requirements for use, the fan will cause a relatively large load on the motor, resulting in hot motor and hot fan.
4、 Installation of fan. If the flow and pressure of the new fan are normal and not overloaded or hot at the beginning of use, but it starts to burn after a period of time, it means that the fan needs to recheck the tightness of the belt and retighten the fixing screws.
I believe that after reading the above contents, you should also have a better understanding of the normal operating temperature range of Roots blower. I hope it will be helpful to you.
Text label: Roots blower
Link to this article: //wuhanzhcs.com/html/news/n02/672.htm
