Roots blower is a kind of volumetric fan equipment. Because the blades in the air cavity of Roots blower are three pieces, it is called Roots blower. Since Roots blower is more stable than two blade Roots blower, it has been fully applied in many fields such as petrochemical, building materials, electricity, smelting, fertilizer, mines, ports, light textile, food, paper making, aquaculture and sewage treatment, environmental protection industry, etc.
During the use of Roots blower, temperature control is a very important problem. Generally speaking, the outlet air temperature of Roots blower is usually not lower than 80 ° C during operation, but the maximum temperature should not exceed 90 ° C. If the temperature is too high, the blades and air chamber of Roots blower will be distorted to a certain extent, which will affect the performance and efficiency of Roots blower.
In order to improve the service efficiency of roots blower and ensure the service life of roots blower, some measures can be taken. If Roots blower is installed indoors, the operating temperature of Roots blower can be reduced by installing air conditioner; If Roots blower is equipped with sound insulation device, the door of the sound insulation device can be opened to reduce the temperature; In addition, reducing the pipeline pressure loss and other pressure losses as far as possible is also an effective way to reduce the operating temperature of Roots blower.
Generally speaking, the higher the pressure of Roots blower is, the higher the temperature is. 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 the first place, the larger the Roots blower is, the higher the temperature will be.
Why the temperature of the same fan produced by different manufacturers is different depends on the adjustment of the clearance, the quality of the bearing, 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. Calculation method of Roots blower body temperature: room temperature+10 ℃ temperature rise for every 1000 mm water column rise (within this range, it is the normal value, if the temperature exceeds the limit, it means that the temperature of Roots blower is too high). The higher the temperature of Roots blower, the more serious the impact on the life of the blower.
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.
Most Roots blowers operate in the open air, and the impact of environmental factors is more obvious in summer. If conditions permit, refrigeration and cooling equipment can be configured on the site to avoid the impact of environmental factors on the fan as far as possible, or sound insulation cover with heat dissipation device can be equipped. 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.
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.
Text label: Roots blower
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