Roots blower is a type of displacement fan. There are two three blade impellers that rotate relatively in the space sealed by the casing and wall plate. Because each impeller uses involute or the envelope of the epicycloid as the impeller processing profile, the three blades of each impeller are identical, and the two impellers are identical, which greatly reduces the processing difficulty. Numerical control equipment is used during impeller processing to ensure that no matter where the two impellers are rotated, a certain minimum clearance can be maintained under the condition that the center distance between the two impellers is constant, so as to ensure that the gas leakage is within the allowable range.
The two impellers rotate in opposite directions. Because the clearance between impellers and impellers, between impellers and casings, and between impellers and wallboards is very small, a vacuum state is formed at the air inlet. The air enters the air inlet chamber under the action of atmospheric pressure. Then, two of the blades of each impeller form a sealed chamber with wallboards and casings, The sealing chamber formed by two blades is constantly taken to the exhaust chamber, and because the impellers in the exhaust chamber mesh with each other, the air between the two blades is squeezed out. In this way, the air is continuously transmitted from the air inlet to the air outlet, which is the whole working process of Roots blower.
The repair and maintenance of the impeller shall be carried out at the initial stage of the operation of the impeller and during all regular inspections. Whenever there is an opportunity, the impeller must be checked for cracks, wear, dust accumulation and other defects. The impeller must be kept clean, and the dust and rust on it shall be regularly brushed off with a wire brush. As the running time increases, these dust cannot be evenly attached to the impeller, which will cause damage to the balance of the impeller and even cause rotor vibration. As long as the impeller is repaired, it needs to be dynamically balanced again. If possible, the portable trial dynamic balancing instrument can be used for on-site balancing. Before dynamic balancing, check whether all fastening bolts are tightened. Since the impeller has been operating in an unbalanced state for a period of time, these bolts may have become loose.
1： The Roots blower has good performance. Compared with ordinary fans, the roots blower has low loss of parts. With correct operation and routine inspection, the roots blower can operate for a long time
2： Long service life The roots blower will have a long service life when it leaves the factory and meets the specifications. The parts that are easy to be damaged are: belts, impellers, oil tanks, etc. These parts should be routinely checked during the operation of the fan in the future to ensure the long service life of the fan. It should be noted that the bearing and impeller of the fan need to be tested for static and dynamic balance when leaving the factory. If they are not tested before leaving the factory, the fan is prone to abnormal noise, friction sound, etc. during operation, which will also affect the service life of the fan
3： High utilization ratio Roots blower is of volumetric type, with high overall utilization ratio and convenient installation and use, which is also the reason why it is widely accepted in the market
4： The air volume range is wide, whether it is low or high, the air volume range of Roots blower is more advertising, except for fans in special circumstances, the air volume of Roots blower can basically cover
I believe that after reading the above, you should also know how to maintain the parts of Roots blower. I hope it will be helpful to you.
Text term label: Roots blower
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