Turbine main shaft seal refers to the rotation of the turbine shaft and seal at the fixed cover. Good spindle seal should have good water and durability performance, and ensure that in the case of small leaks, safe and effective operation of an overhaul cycle. The main domestic and international turbine shaft sealing methods are mainly "contact" seal, such as carbon seal, flat rubber seal, rubber seal and so on. Water turbines running on clean water with good water quality can meet the requirements of good water stop and durability by using the above several sealing methods. Car Brake,Auto Brakes,Car Brake Parts,Car Brake Disc CHANGGE FUKANG MACHINERY ACCESSORIES CO. ,LTD , https://www.fukangcasting.com
However, the turbines running on muddy rivers, using the above-mentioned main shaft seal structure, can not solve the problem of sediment wear inherent in "contact" seals. Especially in flood season, the amount of sediment passing through the machine increases, and the particle size of the machine increases, which often leads to rapid wear of carbon blocks, burning of rubber blocks and wear-through of wear plates to increase the leakage of the units. Some Power plants using multiple drainage pumps pumping day and night is also difficult to completely solve, and even forced to stop the last. This huge annual economic losses due to downtime.
Non-contact "seal-screw seal is a new type of sealing structure that has appeared in recent decades. It mainly consists of a rotary pump and a fixed pump with a threaded groove. There is a certain gap between the rotary pump and the fixed pump. Due to the non-contact structure design, this type of seal has the advantages of abrasion resistance, long life, low power consumption, maintenance-free, easy maintenance and so on. , Has been successfully applied to high head, high speed (speed 500 rpm / 1) turbine, running well, and achieved significant economic benefits.