The rotor of Roots blower rotates in opposite direction at constant speed through gear. The impeller is always kept in correct phase by synchronous gear. The two impellers of Roots blower mesh with each other to separate the air inlet from the air outlet. The impeller, casing and wallboard form a closed primitive volume, and its size does not change during rotation, During the operation of the fan, the gas in the unit volume will be moved from the air inlet to the air outlet to achieve the purpose of forced exhaust. The air volume delivered by the fan is proportional to the number of revolutions. Two impellers suction and exhaust three times every time the type impeller rotates. Compared with the two blade type, the gas pulsation is less, the load change is less, the mechanical strength is high, the noise is low, and the vibration is small.
Check the fastening of each part and whether the locating pin is loose. There is no oil leakage inside the Roots blower body. There shall be no rust or falling inside the Roots blower body. Pay attention to whether the lubrication and heat dissipation are normal, pay attention to the quality of lubricating oil, often listen to whether the blower works noisily, pay attention to whether the unit works under irregular conditions, and pay attention to the punctuality of adding grease. The overload of the Roots blower is sometimes not displayed immediately, so pay attention to the increase trend of the inlet and exhaust pressure, bearing temperature and motor current to determine whether the machine works normally.
During the operation of Roots blower, special attention should be paid to: whether there is friction or foreign matter inhalation between the inner impeller of the casing and the casing, between the impeller and the wallboard, between the impeller and the impeller. Frequent inspection should be carried out. If the friction is serious earlier, the local temperature rise of the casing will be too high, and the surface paint will be burnt. At this time, stop immediately.
During the operation of Roots blower, the bearing, lubricating oil temperature and the indicated value of ammeter must be checked frequently. When the fan needs cooling water, check whether the cooling water volume meets the specified requirements. When the fan is sealed with packing, the leakage of the seal should also be checked. When the leakage is serious, the seal should be replaced immediately to avoid safety accidents caused by dangerous gas leakage, and the leakage of corrosive gas will also damage the bearing.
1. Check the working condition of each instrument panel
The instrument panel of Roots blower includes barometer, voltmeter and flowmeter, which are the key instrument panel. When the Roots blower is operating, if the barometer is too large, it will be a problem of pipeline blockage and internal blockage; If the voltmeter and flowmeter are too large, they will be blocked. Check the inlet and outlet of roots blower for pipeline conditions; If the voltmeter and flowmeter are too small, the working voltage will be unstable.
2. Identify common faults according to sound
When Roots blower is running, it will cause necessary noise. The noise is attributed to all normal mechanical equipment sounds. If there is any abnormal sound, we must turn on the fan to check whether there are hard particles inside the centrifugal impeller and housing; If the sound source comes from the external vibration of the engine body, then our maintenance position should be placed on the fixed anchor bolt.
3. The high-pressure roots blower is stuck and cannot work
In such a situation, the power supply should be turned off immediately for parking. The key positions for subsequent maintenance are gearbox, belt pulley, centrifugal impeller rolling bearing, coupling, etc. The external conditions should be checked first, and then the internal conditions should be checked for maintenance.
I believe that after reading the above contents, you should also understand the maintenance requirements of Roots blower. I hope it will be helpful to you.
Text term label: Roots blower
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