The upper part of the framework guiding support ring is provided with circular ridges, is mutually inlaid and connected with the seal ring.
骨架导向支撑环的上部设有环形凸棱并与密封圈相镶嵌连接。
Under the function of the spring, the elastic airproof ring can generate elastic distortion to cause the circular arc part of the airproof ring to contact with a rollaway nest all the time.
在弹簧的作用下，本实用新型可以产生弹性变形，使密封圈的圆弧部分始终与滚道相接触。
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