活塞环在运行状态下由于存在温度梯度而发生变形，导致活塞环开口附近接触状况变化和径向压力增加。
During the Operation of the engine the temperature graduate is likely to deform the piston ring, as may alter the contact situation at the opening of the piston ring and raise the radial pressure.
分别对开口有背压活塞环和整体无背压活塞环的工作原理和结构作了阐述。
The work principle and structures of backpressure piston rings and integral non-backpressure piston rings were expounded.
活塞环为 便于拆换的开口环或分段环。
The piston ring is an opening loop or a grading ring which is convenient to disassemble and replace.
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