Usually Exhaust Pipe used will be made of MS - mild steel, comes with a quality of expansion and contraction in nature depending on the seasonal changes as well as mechanical changes caused by the generator during running and shutdown time. Expansion bellow consists of flexible SS made spring type arrangement and open flanges welded to both the ends. Expansion bellow fixed between pipe & pipe, pipe & generator turbo etc, acts as medium to adjust with the nature of exhaust pipe during hot, cold times and also observes the vibration generated when the generator is in running and also during nature calamities like earth quakes. With generator in running condition, exhaust pipe becomes severely hot, hence expands few millimeters, in such case bellow fixed between contracts itself balancing the pressure caused due to expansion exhaust pipe. Similarly when the generator is shutdown, pipe becomes cool & hence returns back to its original position, allows expansion bellow also return back to its original state. If exhaust pipe contracts more even than original state even expansion bellow expands to desired levels to balance the contraction of pipe. Thus by balancing the pressure created by exhaust pipe contraction and expansion, expansion bellow serves in many ways...
1. Helps in saving from causing damage to generator because of heavy exhaust pipe expansion.
2. Helps in not causing the damage to the building wall or self support structure where exhaust pipe is erected.
3. Avoiding passing of vibration from exhaust pipe to generator, generator to exhaust pipe, building wall and self support structure. Less vibration also helps in reducing noise pollution running through erected places like building walls.
Important note: Not just bellow, Exhaust pipe should be erected with sliding supports ie.., supports should allow pipe to contract and expand.
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EXPANSION BELLOWS FIXED BETWEEN GENERATOR TURBO AND EXHAUST PIPE'S |
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