The operation before use of Roots blower is to comprehensively check all parts of the blower, whether the parts are complete, the connection tightness of all bolts and nuts, the installation quality of all fastening copies and positioning pins, the installation quality of air inlet and exhaust pipes and valves, etc. In order to ensure the safe operation of the blower, it is not allowed to bear external loads such as pipes, valves, frames, etc. Check the centering and alignment quality of blower and motor.
Check whether the base of the unit is fully padded and whether the foundation bolts are fastened. Fill the oil tank with du mechanical oil of specified brand into the oil level line, and the lubricating oil brand is N220 medium load working gear oil. Check whether the rotation direction of the motor meets the pointing requirements. The belt cover (protective cover) shall be installed at the belt pulley (coupling) to ensure the safety of operation. Fully open the inlet and outlet valves of the blower, and turn the rotor of the blower. It should rotate flexibly without impact and friction. Only when it is confirmed that everything is normal can the dao blower be started for trial operation.
1、 Usage requirements
1. The inlet air temperature of the conveying medium shall not exceed 40 ℃.
2. The particle content in the medium shall not exceed 100mg m3, and the maximum particle size shall not exceed half of the minimum working gap.
3. During operation, the bearing temperature shall not be higher than 95 ℃, and the lubricating oil degree shall not be higher than 65 ℃.
4. The operating pressure shall not be higher than the pressure rise range specified on the nameplate or the pressure rise range specified in the performance table of this manual.
5. The clearance between fan impeller and casing, impeller and impeller has been adjusted when leaving the factory, and the clearance shall be ensured when reassembling. (Too large clearance will affect the performance. Too small clearance will cause friction and collision due to thermal expansion.)
6. When the blower is running, the oil level of the main oil tank and auxiliary oil tank must be between the two meridians of the oil level gauge.
2、 Performance range
The suction flow in Roots blower performance refers to the suction flow when the suction pressure is standard atmospheric pressure, the suction temperature is 20 ℃, and the carrier is clean air. (When the blower transports special gas, the suction flow shall be converted according to the molecular weight of the conveying medium, inlet temperature and inlet and outlet pressure.
3、 Operation method
Operation preparation
1. Thoroughly remove the dust and sundries inside and outside the machine, and avoid mixing with oil.
2. Check whether the connection part of the inlet and outlet is firm, whether the supporting parts of the piping are complete, and whether the installation of fans and cooling water pipes that need cooling water meet the requirements.
3. If there are welding slag and iron filings in the piping, they should be completely removed.
4. Return the lubricating oil to the upper line of the two oil level lines (the oil level will drop slightly after the blower runs). If the oil is injected too little, the gear and bearing will be burned; Excessive oil injection will often cause high temperature rise and damage to gears and other parts. The lubricating oil generally adopts the kinematic viscosity 220 # full loss system oil.
5. Oil shall not be added during fan operation. The oil shall be replaced for the first time after one week of operation and for the second time after one month of operation. In the future, the lubricating oil of the main and auxiliary oil tanks shall be replaced on schedule.
6. Turn the fan coupling along the rotating direction by hand to check whether there is any abnormality.
（2） Test run
1. Open the valves at the inlet and exhaust sides, switch on the power supply under no-load condition, and verify the rotation direction. The fan requiring cooling water can be started only after the cooling water is connected.
2. After starting, run for 20-30 minutes without load to check for abnormal vibration and heating. In case of any abnormality, stop the vehicle immediately to find out the cause. Most of the abnormalities are caused by poor installation or misalignment of the coupling, as well as other conditions such as improper lubricating oil level.
3. Then, operate under normal load for 2-3 hours, and observe the temperature and vibration of each component at the same time.
4. Attention shall be paid to the indication of the ammeter during operation. In case of any abnormality, the machine shall be stopped immediately for inspection. Most of the reasons are caused by the friction of the impeller.
Precautions during operation
1. During operation, the temperature of bearing and lubricating oil, and the indication 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.
2. Check regularly and make records.
3. When parking, it is necessary to first unload and then stop. In case of improper operation, shutdown with load or shutdown due to sudden power failure, the high-pressure gas in the system at the outlet side of the fan will quickly flow to the inlet side of the low fan (commonly referred to as "backflow"), thus causing the high-pressure gas to drive the fan impeller to accelerate the reflection operation, and the fan impeller speed is getting higher and higher. When the impeller speed reaches its limit speed, it will cause the impeller to collide with the casing A vicious accident of smashing.
I believe that after reading the above contents, you should also understand the operating procedures of Roots blower. I hope it will be helpful to you.
Text term label: Roots blower
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