In fact, the vent valve is an ordinary valve, which has all kinds of styles. The name comes from its function, which is to discharge the pressurized gas or liquid through it during non work or emergency to avoid other accidents. So it is called "vent valve" and "vent valve".
Roots blower starts with time and load. When Roots blower starts, the vent valve slowly closes, and the blower reaches the working standard state; When the fan is stopped, first slowly open the vent valve to make the fan in no-load state, then cut off the power supply and stop! Among them, the vent valve mainly plays the role of protection.
Before starting Roots blower, check all aspects, including lines, pipes, parts, etc., and carefully check whether there is any fault. Vent the equipment before starting. Roots blower has the nature of forced exhaust. If it is not vented, or the vent valve is only opened a little, it will lead to insufficient air output, too much air intake, and gas compression in the blower rotor cavity, the pipeline between the blower outlet and the valve.
The motor speed is certain, that is to say, the blower speed is certain, the exhaust volume is constant, the exhaust gas is continuously compressed in the pipe and rotor cavity, and the compressed gas is more and more, which will inevitably require greater force to be used for the previously compressed gas, so that the fan can maintain the speed constant, then it is easy to lead to: ① The motor is burnt out. The voltage of the motor is constant, the speed is constant, the demand force is greater, and the work is more. The motor power increases, the current increases, the current is too large, the protection system stops, and the motor without protection system is burned out
② The fan bursts. The fan is heated by compressed gas, and the heat cannot be discharged in time. Fan heating, softening and embrittlement of fan casing.
The fan is subject to two external forces at the same time:
1. The strong torque of the motor to the main shaft and bearing of the fan.
2. The outward thrust of the air pressure in the inner chamber on the fan casing.
Combined with heat and force, the fan bursts, even explodes.
③ The system pipes and valves were burned out. The reason is the same.
I believe that after reading the above, you should also understand the function of the vent valve of Roots blower. I hope it will help you.
Text label: Roots blower
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