1、 Cause of high temperature of roots blower _ roots blower: Solution:
(1) There is too much oil, too thick and dirty in the oil tank; (1) Lower the oil level or carry oil;
(2) The filter or muffler is blocked; (2) Remove the blockage;
(3) The pressure is higher than the specified value; (3) Reduce the pressure difference through the drum roots blower;
(4) The impeller is excessively worn with large clearance; (4) Repair clearance;
(5) Poor ventilation and high indoor temperature cause high inlet temperature; (5) Open vents to reduce room temperature;
(6) The running speed is too low, and the belt slips. (6) Increase the rotating speed to prevent the belt from slipping.
2、 Cause of insufficient flow of roots blower _Roots blower : Solution:
(1) Inlet filtration is blocked; (1) Remove the dust and blockage of the filter;
(2) The impeller is worn and the clearance increases too much; (2) Repair clearance;
(3) Belt slipping; (3) Tighten the belt and increase the number of belts;
(4) Large inlet pressure loss; (4) Adjust the inlet pressure to the specified value;
(5) The pipeline causes ventilation leakage. (5) Check and repair pipes.
3、 Cause of oil leakage or leakage into the casing of Roots blower _Roots blower ： Solution:
(1) The oil tank is too high and leaks out from the oil drain; (1) Lower the oil level;
(2) The seal is worn, causing oil leakage at the shaft end; (2) Replace the seal;
(3) The pressure is higher than the specified value; (3) Dredge the vent;
(4) The air vents of the wallboard and oil tank are blocked, causing oil leakage into the casing. (4) Install a cock with 2mm hole diameter in the middle chamber, and open the cock under the wallboard
4、 Roots blower causes abnormal vibration or noise _ Roots blower
(1) The clearance of rolling bearing exceeds the specified value or the bearing seat is worn;
(2) The gear backlash is too large, misaligned, and not tightly fixed;
(3) Impellers collide with impellers and impellers collide with casings due to foreign objects and dust;
(4) Impeller collision due to overload and shaft deformation;
(5) Friction between impeller and casing inlet due to overheating;
(6) The impeller loses balance due to scale or foreign matters;
(7) Anchor bolts and other fasteners are loose.
Countermeasures
(1) Replace the bearing or bearing seat;
(2) Reassemble the gear and ensure the backlash;
(3) Clean the drum roots blower and check whether the casing is damaged;
(4) Check the back pressure, check whether the impeller is aligned, and adjust the clearance;
(5) Check the filter and back pressure, and increase the clearance between the impeller and the casing inlet;
(6) Clean the impeller and casing to ensure the working clearance of the impeller;
(7) Tighten the foundation bolts and level the base.
5、 Roots blower motor load Consequences _Roots blower
(1) Compared with the specified pressure, the pressure difference is large, that is, the back pressure or inlet pressure is high;
(2) Compared with the flow required by the equipment, the flow of Roots blower is too large, so the pressure increases;
(3) The inlet filtration is blocked, and the outlet pipeline is blocked or blocked;
(4) Collision and friction (seizure) of rotating parts;
(5) The oil level is too high;
(6) The narrow V-belt is overheated, the vibration is too large, and the pulley is too small.
Solution
(1) Reduce the pressure to the specified value;
(2) Put the excess gas into the atmosphere or reduce the speed of the drum roots blower;
(3) Remove obstacles;
(4) Stop the machine immediately and check the cause;
(5) Adjust the oil level to the correct position;
(6) Check the belt tension and replace it with a large diameter pulley.
6、 The motor of Roots blower does not rotate generally due to the following reasons _Roots blower :
1. Overload: It is generally caused by air filter blockage, exhaust pipe blockage, and rotor deviation during handling.
2. Motor:
＜ 1. Poor insulation ＜ 2. Too much dust ＜ 3. Water ingress ＜ 4. Bearing damage
3. Bad wiring and line interruption
4. The fuse is broken
5. Roots blower is defective
＜ 1. No abrasion of lubricating oil: this causes oil leakage due to no-load operation, clogging of filter joint filter screen of Roots blower, pipeline damage, clogging of air filter, and insufficient oil in oil tank.
＜ 2 Mixed with dirt such as sand dust
<3 Water ingress rusts
＜ 4 Rotor deviation, bearing damage
6. The voltage is too low
7. Overheating trip
7、 Causes of insufficient exhaust of Roots blower _Roots blower ：
1. Insufficient lubricating oil
2. Poor oil quality
3. Air leakage in oil duct
4. The inlet filter is blocked
5. The belt slips too loose
8、 Other common fault causes and solutions _Roots blower ：
1 Friction between impeller and impeller
(1) The impeller is contaminated with impurities, resulting in too small clearance;
(2) Gear wear causes large backlash;
(3) The gear is not firmly fixed and cannot keep the impeller synchronized;
(4) The bearing wear causes the clearance to increase.
(1) Remove the dirt and check whether the internals are damaged;
(2) Adjust the gear clearance. If the gear backlash is greater than 30%~50% of the average value, replace the gear;
(3) Reassemble the gear and keep the taper fit contact area up to 75%;
(4) Replace the bearing;
2 Friction between impeller and wallboard, impeller top and casing
(1) Incorrect installation clearance;
(2) The operating pressure is too high, exceeding the specified value;
(3) The operating temperature is too high;
(4) The casing or base is deformed, and roots blower positioning is invalid;
(5) The axial positioning of the bearing is poor.
(1) Readjust the clearance;
(2) Find out the cause of overload and reduce the pressure to the specified value;
(3) Check the installation accuracy and reduce the pipeline tension;
(4) Check and repair the bearing and ensure the clearance.
Word tag: Roots blower
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