Weak current College】 【roots blower works and use.

Roots blowers for positive displacement blowers, conveying air flow is proportional to the speed Airfoil impeller, three per rotation by 2 to 3 times the impeller sucks, exhaust. Compared with the second leaf-type, gas Pulsations of small, small vibration, low noise too. Fan 2 axes on the impeller and oval shell hole surface, the impeller end face and rear cover between fan and fan impeller who remain between the small gap in the synchronization gear driven downwind from the fan inlet along the inner wall of the shell to the exhaust side. Fan-shaped cavity does not require lubrication, simple structure, smooth, stable performance, adaptation to a wide variety of uses, has used in a wide range of areas.
The characteristics of the roots blower
As a result of the trefoil rotor structure and reasonable shell efects of structure, so the fan small vibration, low noise.
Impeller and axial to the overall structure and impeller wear-free fan performance durable, can be long-term continuous operation.
Fan capacity utilization, high volumetric efficiency and compact structure and installation flexibility.
Bearing selection more reasonable, the service life of the bearings evenly, thereby extending the life of a fan!
Blower oil imported fluoro rubber materials, high temperature resistance, abrasion resistance, long service life.
Well-found, can meet the different needs of users for different purposes.
Roots blower failure analysis and solution
1 grinding impeller and impeller
(1) the impeller has caused contamination, clearance is too small;
(2) gears, resulting backlash;
(3) gear fixed is not strong, cannot keep impeller synchronization;
(4) increase the bearing wear resulted in clearance.
(1) remove dirt, and check the contents for damage;
(2) adjust gear clearance, if gear backlash is greater than the average of 30% to 50% should replace gear;
(3) reassemble gear, to keep the contact area of taper with up to 75%;
(4) replacement of bearings;
2 impeller and wall panel, top and side of the impeller
(1) the installation space is not correct;
(2) operating pressure is too high, exceeding the specified value;
(3) operating temperature is too high;
(4) chassis or frame deformation, fan positioning;
(5) for the axial location of bearings.
(1) adjust gap;
(2) identify the reasons, will pressure overload to Regulation;
(3) check the installation accuracy, reduce the pipe tensile strength;
(4) check repair bearings, and ensure that clearance.
3 temperature too high
(1) tank oil too much, too thick, big dirty;
(2) filter or muffler clogged;
(3) pressure higher than the specified value;
(4) the impeller excessive wear, gap;
(5) ventilation is not good, the room temperature is high, resulting in higher inlet temperature;
(6) the speed was too low, belt slippage.
(1) to reduce the oil level or with oil;
(2) clear blocking;
(3) reduce pressure difference by blower;
(4) repair gaps;
(5) open vents, lower the room temperature;
(6) increase speed to prevent the belt slippage.
4 flow shortage
(1) import filter plug;
(2) the impeller wear, clearance increase too much;
(3) belt slipping;
(4) large inlet pressure losses;
(5) pipeline leak caused ventilation.
(1) clear filter dust and obstruction;
(2) fix the gap;
(3) tensioning belts and increase the number;
(4) adjust the inlet pressure to reach regulation;
(5) inspection and repair piping.
5 spill or leak in the case of oil
(1) fuel tank maximum high, the oil mouth;
(2) seal wear, causing the shaft end oil spills;
(3) pressure higher than the specified value;
(4) wall plate and tank vent plug, the resulting oil leak into the enclosure.
(1) to reduce the oil level;
(2) replace the seal;
(3) clear vents, intermediate cavity equipped with 2mm aperture plug, open the wall plug; under
6 abnormal vibration and noise immediately stop
(1) bearing internal clearance than specified value or housings and wear;
(2) gear backlash is too large, misalignment, fixed tightly;
(3) because of the foreign matter and dust resulted in the impeller and the impeller, the impeller and the enclosure colliding;
(4) as a result of overload, collision caused impeller shaft deflection;
(5) due to overheats impeller and chassis inlet friction;
(6) because of the scale or foreign material impeller rotation out of balance;
(7) bolts and other fastener loosening.
(1) replace the bearing or housing;
(2) reload gear and ensure that the backlash;
(3) cleaning blower, check the enclosure for damage;
(4) check back pressure, check whether the impeller, and adjust the clearance;
(5) check the filters and the back pressure, and increase the impeller and the enclosure import office space;
(6) the cleaning of impeller and the enclosure, ensure that the work space; impeller
(7) tighten bolts and levelling feet.
7 motor overload
(1) compared with the provisions of the pressure, differential pressure, i.e. the large back pressure or inlet pressure is high;
(2) and equipment requirements,Air flow rate is too big, therefore increasing pressure;
(3) import filter blockage, export pipeline obstacles or blocked;
(4) rotating parts touch, and friction (stall);
(5) oil level too high;
(6) narrow v belt over heat, vibration is too large, too small belt pulley.
(1) reduce the pressure to the specified value;
(2) excess gases into the atmosphere or lower blower speed;
(3) clear of obstructions;
(4) immediately shut down, check the reason;
(5) will be transferred to the correct oil level;
(6) checking belt tension, replaced by large-diameter of the pulley.