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 ℃. On the other hand, the larger the fan 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.
1. Inlet gas temperature
Roots blower has two air inlets, one is the air inlet, the other is the exhaust port. Generally, the temperature of the gas transported by Roots blower is about 40 degrees, and the outlet temperature is about 80 to 100 degrees. If the temperature of the gas entering the air inlet increases, the temperature of the outlet will also increase. For example, in winter and summer, the outlet temperature in summer will be higher than that in winter.
2. Stress factors
The higher the back pressure of roots blower of the same model is, the higher the temperature of outlet gas will be. It is easy to understand that the more compressed the gas is, the more heat will be released, and the higher the exhaust temperature will be. 3. Volume efficiency factor
Volume efficiency refers to the product of mixed gas actually inhaled by the fan during the intake stroke divided by the fan volume. Under the same pressure model, the higher the volumetric efficiency, the lower the temperature, and the lower the volumetric efficiency, the higher the exhaust temperature. Due to the design of roots blowers, all of them are involute roots blowers.
4. Other factors
There are other factors that affect the exhaust temperature of roots blower, most of which are caused by equipment failure, such as: lack of lubricating oil, lack of lubricating oil, mutual friction between gears will generate a lot of heat, which will also affect the exhaust temperature of roots blower. Another example is some human factors, such as the gate valve is not fully opened, the check valve is installed reversely, etc. These conditions will affect the pressure of Roots blower. When the pressure rises, the exhaust gas temperature will also rise. Generally, we have sound insulation devices for Roots blowers. In summer, we must open the door of the sound insulation hood. The sound insulation cover forms a closed space, which increases the ambient temperature, resulting in higher temperature of the air inhaled and higher outlet temperature. Many Roots blowers equipped with sound insulation covers have inlet temperatures exceeding 45 degrees in summer. Roots blower is installed indoors. Air conditioners can be installed if conditions permit. Don't regret air conditioning and electricity. Because the life of the motor will be greatly reduced when the temperature increases by 10 degrees. Therefore, indoor air conditioning can not only prolong the service life of equipment, but also reduce the outlet temperature. Reducing the inlet temperature and outlet pressure can help us reduce the temperature. If you want to further understand why, you need to understand a formula: outlet temperature of Roots blower=inlet temperature+(10-12) * pressure. If you don't understand something, you can contact our staff. Reduce pipeline bends and other pressure losses as far as possible.
Causes of high temperature of Roots blower
1. There is too much oil, too thick and too dirty in the oil tank;
2. The filter or muffler is blocked;
3. The pressure is higher than the specified value;
4. The impeller is excessively worn with large clearance;
5. Poor ventilation and high indoor temperature cause high inlet temperature;
6. The running speed is too low, and the belt slips;
I believe that after reading the above content, you should also understand the reason for the high temperature of Roots blower. I hope it will help you.
Text label: Roots blower
