**Working principle and maintenance guide of Roots blower**
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**1、 Working principle of Roots blower**
1. * * Principle of volumetric conveying**
-A closed chamber is formed by the reverse synchronous rotation of two three leaf or two leaf rotors in the cylinder.
-* * Inhalation stage * *: When the rotor separates, the volume on the intake side increases, forming negative pressure to suck in gas.
-Transport stage: The gas is enclosed between the rotor and the cylinder, and is pushed to the outlet as the rotor rotates.
-Exhaust stage: The chamber is connected to the exhaust port, and the gas is forcibly discharged (without internal compression, the pressure is determined by the system resistance).
! [Working principle of Roots blower]（ https://via.placeholder.com/400x200text=Roots +Blower+Working+Principle)
*(Rotating rotor creates directional flow of gas)*
2. * * Core Features**
-* * Constant flow output * *: The air volume is proportional to the speed and is affected by pressure.
-Pulse airflow: A muffler needs to be installed (the three bladed rotor has less pulsation than the two bladed rotor).
-* * No lubricating oil pollution * *: Dry operation, suitable for clean gas transportation.
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**2、 Key maintenance content**
**1. Daily maintenance**
|* * Project * * | * * Operational Requirements * * | * * Cycle * *|
|------------------|------------------------------|----------|
|Oil level check | Maintain the centerline position of the oil gauge (ISO VG68) | Daily|
|Pressure/temperature recording | Bearing temperature ≤ 75 ℃, pressure ≤ rated value | Per shift|
|Abnormal noise monitoring | No metal friction sound | Running time|
**2. Regular maintenance**
|* * Project * * | * * Operating Steps * * | * * Cycle * *|
|------------------|------------------------------|----------|
|Cleaning of intake filter | Backblowing with compressed air or replacing filter element | Monthly|
|Belt tension adjustment | Thumb pressing sinks 10-15mm | Quarterly|
|Lubricating oil replacement | Drain old oil, clean oil circuit | Annual|
|Rotor clearance detection | measured with a feeler gauge (standard 0.2-0.4mm) | annually|
**3. Overhaul project (8000 hours or 2 years)**
-Replace bearings and seals
-Check the wear of the synchronous gear (if the backlash is greater than 0.1mm, it needs to be replaced)
-Repair of wear-resistant layer on cylinder inner wall
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**3、 Common fault handling**
|* * Fault phenomenon * * | * * Possible causes * * | * * Solution * *|
|----------------|-----------------------|---------------------------|
|* * High temperature alarm * * | Insufficient lubricating oil/poor cooling | Add oil or clean the water cooling jacket|
|* * Decreased air volume * * | Filter blockage/belt slippage | Clean the filter or adjust the belt|
|Abnormal vibration | Bearing damage/rotor dust accumulation | Replace bearings or clean rotor|
|Oil leakage * * | Oil seal aging | Replace mechanical seal|
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**4、 Maintain standards**
1. * * Shutdown maintenance must * *:
-Cut off the power and hang a warning sign
-Close the inlet and outlet valves and release the pipeline pressure
2. Explosion proof scenario:
-Use copper tools to avoid sparks
-Prohibit live operation (Ex certified equipment)
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**5、 Suggestions for Efficiency Enhancement and Maintenance**
1. * * Variable frequency transformation * *: saves energy consumption by 20-40% (especially suitable for variable load conditions).
2. * * Intelligent monitoring * *: Install vibration sensors and wireless temperature transmission to achieve predictive maintenance.
3. Wear resistant upgrade: Under dusty conditions, spraying tungsten carbide coating on the impeller can extend its lifespan by three times.
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**Tip: The rotor clearance is a key parameter that affects efficiency, and if the wear exceeds 0.5mm, it needs to be professionally adjusted! Regular maintenance can reduce energy consumption by more than 15%.
