Apparatus for sealing a high pressure installation including a movable member, especially an oscillatory movable plunger or a rotary shaft

摘要

The apparatus for sealing a movable member with respect to a liquid medium, especially an oscillatory movable plunger or a rotary shaft within the bore of a high pressure installation comprises an intermediate sleeve, a ring member, and a bushing which are successively arranged with respect to a pressure space or chamber and which are axially biased towards the pressure space by a pressure sleeve. On the side remote from the pressure space the ring member is provided with a recess in the shape of a truncated cone or pyramid. On the side facing the ring member the bushing is formed with a protrusion possessing a complementary truncated cone or pyramid shape. A support ring may be arranged between adjacent surfaces of the ring member and the bushing. On the side facing the intermediate sleeve the ring member has a section of reduced diameter surrounded by a biasing ring subjecting the ring member to a radial force directed towards the movable member. In a transitional region between the section of smaller diameter and the remaining portion of the ring member there may also be provided a support ring. The ring member also may have the form of a sealing collar with a V-shaped cross-section and at both end faces there are arranged support rings.