Comparing these two systems (GA and WYH sealing systems), it is evident that the sealing position is a significant factor in the difference between the two. Due to its proximity to the rotor, the WYH sealing system only has a small dead angle where material may accumulate. On the other hand, the moving and abrasive fillers can easily enter the sliding surface directly, which has a negative impact on the wear of the equipment. The GA sealing system has a relatively long annular gap, and due to the long retention time of the powder in the annular gap, it can be better bonded by oil. Therefore, sliding surfaces can be better protected and the force of sealing loading can be minimized. However, at the same time, the risk of some materials accumulating in the annular gap increases, and sealing oil is particularly important here.
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