Steps for starting Roots blower
**Roots blower startup steps (standardized operating procedures)**
Roots blower belongs to * * positive displacement high-pressure blower * *, incorrect starting method may cause motor overload, impeller damage or accidents. The following are the standard startup steps and precautions:
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**1、 Check before startup**
1. * * Mechanical inspection**
-Fasteners: Check if the anchor bolts, coupling/pulley screws are loose.
-Lubricating oil: Whether the oil level of the gearbox is at 1/2~2/3 of the oil window (special lubricating oil should be added according to the instructions for the first start-up).
-* * Rotor flexibility * *: Manually turn the rotor 2-3 times to confirm that there is no blockage or abnormal noise in the impeller.
2. Pipeline system inspection**
-Imported filter: Clean the filter screen to avoid blockage (blockage can cause insufficient air flow).
-Valve status:
-* * Export valve * *: must be * * closed * * (starting under pressure is strictly prohibited!).
-* * Bypass valve * *: If there is a bypass pipeline, it needs to be opened first (to reduce the starting load).
3. Electrical inspection**
-* * Power Supply Voltage * *: Verify the rated voltage of the motor (e.g. 380V ± 5).
-* * Steering test * *: Jot the motor to confirm that the direction of impeller rotation is consistent with the arrow mark on the housing (reversing will damage the fan).
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**2、 Startup operation steps**
1. * * No load start**
-Close the outlet valve (core step!).
-Start the motor and observe if the ammeter is within the normal range (the instantaneous starting current is high, but should fall back within a few seconds).
2. * * Gradually load**
-Slowly open the outlet valve to the desired opening (avoid valve opening<30 when adjusting flow to prevent overpressure).
-If it is frequency conversion control, gradually increase the frequency to the target value (to avoid sudden acceleration).
3. * * Operation monitoring**
-Pressure gauge: Do not exceed the rated pressure indicated on the nameplate (immediately close the valve or stop the machine if overpressure occurs).
-* * Temperature * *: Bearing temperature ≤ 75 ℃, oil tank temperature ≤ 65 ℃ (abnormal temperature rise requires shutdown to check lubrication system).
-Vibration/Noise: Abnormal vibration may be caused by dust accumulation on the impeller, bearing wear, or loose foundation.
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**3、 Emergency situation handling**
If the following situations occur, stop the machine immediately:
Intense vibration or metal friction sound
The motor current continues to exceed the set value
Smoke or lubricant splashing
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**4、 Precautions**
1. * * Starting under pressure is strictly prohibited * *: It must be started without load before gradually increasing pressure!
2. * * Prohibit frequent start stop * *: Start no more than 3 times per hour to avoid motor overheating.
3. * * Power on after long-term disuse * *: It is necessary to manually turn the wheel first to eliminate the risk of impeller corrosion and jamming.
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**5、 Shutdown steps**
1. Gradually close the outlet valve.
2. Cut off the power supply.
3. Record operating parameters (such as cumulative running time, abnormal situations).
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**Common erroneous operations**
**Directly open the valve to start * * → motor overload and burnout
**Reverse start * * → Gear and impeller damage
**Oil shortage operation * * → Bearing high temperature biting and death
Strictly following the procedures can extend the lifespan of the machine! The specific parameters are subject to the equipment manual.
