The fine seals of the rotating oil cylinder prevent oil leakage between the rigid and fixed appearances. The oil leakage affects the security of the system's tasks, forms oil scum, cleans the surrounding environment, increases the return time of the machine, reduces the consumption rate, increases Consumption of old money and defacement of products. Therefore, the rotary oil cylinder has certain requirements on the precision seals. 1. Reasonably design the dimensions and tolerances of the seal groove. The oil cylinder will deform the seal after installation to ensure that the macroscopic depression of the appearance is filled, and the internal stress of the seal is increased to higher than the pressure to be sealed. 2. When the stiffness of the part or the pre-tightening force of the bolt is not large enough, the appearance of the cooperation will be formed under the action of the oil pressure to form a gap or increase the gap that can exist from the beginning because the seal appearance is not flat enough. 3. With the appearance of the welded pipe stationary, the fine seal becomes a dynamic seal. Rough mating surfaces will wear the seals and changing gaps will overwhelm the edges of the seals.
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