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实用新型
CN203797000U 一种平衡型满足正反高压密封要求的阀芯密封结构 失效 - 权利终止

一种平衡型满足正反高压密封要求的阀芯密封结构
摘要：
本实用新型为一种平衡型满足正反高压密封要求的阀芯密封结构，它包括阀芯、弹性挡圈、挡块、第一径向密封圈、挡圈、第二径向密封圈以及套筒，所述第一径向密封圈和第二径向密封圈分别设于挡圈的两侧。利用两个具有相反密封方向的径向密封圈对正向和反向流动的高压介质都起到很好的密封效果，其中第二径向密封圈就能密封着阀芯上面流向阀芯和套筒间隙的高压介质，第一径向密封圈就能密封着阀芯下面流向阀芯和套筒间隙的高压介质，起动正反的双向密封。使径向密封圈的唇口相对安装设计，是为了减少径向密封圈唇口密封处的压差，从而减少径向密封圈的摩擦阻力，实际应用中此结构能使阀门能起到正反V级的泄漏等级要求。
摘要（英）：

The utility model provides a balance type valve element sealing structure meeting the requirements for positive and negative high pressure sealing. The balance type valve element sealing structure comprises a valve element, an elastic check ring, a check block, a first radial seal ring, a check ring, a second radial seal ring and a sleeve. The first radial seal ring and the second radial seal ring are arranged on the two sides of the check ring respectively. The two radial seal rings which are opposite in sealing direction are used and play a good effect in sealing high pressure media which flow in the forward and reverse direction, the second radial seal ring can seal the high pressure media located above the valve element and flowing to the gap of the valve element and the sleeve, the first radial seal ring can seal the high pressure media located below the valve element and flowing to the gap of the valve element and the sleeve, and therefore the radial seal rings play a role in forward and reverse direction sealing. Lips of the radial seal rings are relatively installed so that differential pressure at the sealing positions of the lips of the radial seal rings can be lowered, and consequently, frictional resistance of the radial seal rings is reduced. The balance type valve element sealing structure enables a valve to meet the leakage level requirements of forward and reverse V level in practical application.

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