Three leaf roots blower can not use gate valve to adjust aeration and air volume
During the operation of the three leaf roots blower, attention should be paid to checking: power supply, voltage, current value, pressure, atmospheric temperature, discharge temperature, bearing temperature, vibration, noise, oil level, dirt degree, belt tension and other matters, and leave a record sheet, which is very helpful for early detection or cause investigation of problems. It is absolutely not allowed to use the outlet gate valve to adjust the air volume. Instead, the speed of Roots blower should be changed or the prevention and control method of exhaust valve should be provided.
1、 Function of gate valve
The gate valve is only used when the fan is started and stopped. It is not the regulator of the three blade roots blower to control the fan air volume. This is the function of gate valves. What will happen if we open the gate valve in half?
2、 Half open result of gate valve
If our three blade roots blower operates under normal conditions, in short, the air volume and pressure of the fan are stable, and it is necessary to ensure normal operation. However, when we close the gate valve of normal operation fan to half open, the pressure of three blade roots blower will increase. If you look at the pressure gauge of the fan, we know that the gauge pressure has increased. At this time, the motor load increases, and the whole equipment is in overload operation state.
In this case, the fan will usually show that the overall temperature of the fan is rising, the operation of the motor will be damaged, and the motor may be burnt out. The gauge pressure value of the pressure gauge will also increase, exceeding the rated pressure value on the rating plate.
3、 How to adjust
The "three leaf roots blower" can adjust the air volume in the following ways: first, for the belt drive type, it is necessary to adjust the size of the belt pulley to indirectly adjust the speed of the fan, so as to achieve the purpose of adjusting the air volume of the fan. Secondly, replace the motor with a high-frequency motor or a low-frequency motor to adjust the air volume. Finally, a frequency converter is added to the fan to control the speed of the motor through the control cabinet of the frequency converter, so as to achieve the purpose of adjusting the air volume of the fan.
Conclusion: through control Roots blower It is not correct to control the ventilation capacity of the fan by using the inlet pipe or outlet pipe of the fan. Please use scientific methods to control the air volume of the fan. Roots blower The wind pressure is not limited by the speed of the fan, no matter how the speed changes, the wind pressure can remain unchanged. The air volume is proportional to the fan speed. Roots blower constant torque load, its power saving rate is proportional to the speed drop, although different from the general fan, pump power saving rate is higher, but because of its large power, and as long as the furnace wall is not bad, it is working for 24 hours continuously, and the start-up time is also very long, so the potential of power saving is great and the cost of saving electricity is high. 5. Avoid incomplete filtration: air must be filtered when entering roots blower to ensure that some hard impurities in the air enter into the fan, which will cause damage to the impeller if these impurities enter the fan. In the long run, the service life of the fan will also cause certain impact. Roots blower After the technical transformation, the production mode that used to adjust the air pressure or air volume by adjusting the opening of the outlet or inlet valve was changed. The labor intensity was reduced, the adjustment was timely, the qualified rate of the product was improved, and the unit consumption was decreased significantly.
It is not allowed to use gate valve to adjust aeration and air volume of three leaf roots blower http://theoxfordjazz.com/xw/155.html
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