Y-shaped centripetal bidirectional sealing leather ring

Abstract

The invention discloses a Y-shaped centripetal bidirectional sealing leather ring. The Y-shaped centripetal bidirectional sealing leather ring is characterized in that a Y-shaped head of the leather ring faces the axis, the part, within the width range of a leather ring handle, in the middle of the leather ring cannot be compressed outwards in the radial direction, the aperture of the leather ring is slightly larger than the diameter of a plunger, the leather ring is not in contact with the plunger, the friction resistance of a plunger moving part can be effectively reduced, oil can be hidden in the clearance portion of the leather ring, and the leather ring is kept lubricated. The diameter of the outer end of the leather ring is slightly larger than the diameter of a leather ring groove, and the leather ring and a shell body can be effectively sealed through interference fit of the leather ring and the leather ring groove. Inner rings, axially and obliquely closed, on the two sides of the leather ring can be compressed outwards in the radial direction, the diameter of the inner rings is slightly smaller than that of the plunger, the original plunger attachment sealing function can be effectively achieved, and even though the leather ring is used for a long time, and the inner surface layers of the inner rings of the leather ring are abraded to a certain degree, the inner rings of the leather ring can be closed to be attached to the plunger under the action of working media in the working process in cold winter, the sealing effect is achieved, and the leather ring is durable, convenient to use, practical, long in service life and good in sealing.

Description

technical field [0001] The invention relates to a sealing device which uses compressed air or oil as the working medium (or both) to keep the front and rear (or upper and lower) cavities of a two-way moving plunger or column sealed. Especially the Y-shaped centripetal two-way sealing apron that can ensure that after long-term use has certain wear and tear, it can still effectively seal in cold weather, that is, the Y-shaped head of the apron is facing the axis of the plunger or column A Y-shaped centripetal bidirectional sealing apron. Background technique [0002] At present, the seals of the known two-way moving plungers or rods (hereinafter referred to as plungers) are mostly sealed with circular sealing rings (hereinafter referred to as O-rings) in cross section, and a small part is sealed with approximately X-shaped seals. Circle for sealing. The advantage of using an O-ring as a seal is that the structure is simple, the manufacturing is labor-saving, and the cost is ...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the shortcomings of poor sealing reliability and durability of the existing O-rings used for sealing between the front and rear cavities or upper and lower cavities of the plunger or the two-way moving part of the column, the purpose of the present invention is to provide a The Y-shaped centripetal two-way sealing apron (abbreviated as Y-shaped apron) with two-way sealing effect on the two-way moving parts of the plunger or column, uses the Y-shaped centripetal apron instead of the O-ring as the two-way moving part of the plunger or column The two-way seal is called Y-shaped centripetal apron, that is, the two arm circles of the Y-shape that open obliquely on both sides are gathered toward the axis of the plunger or column, and the width of the apron handle cannot be radial Compressed outwards, it is called the solid part; the part of the apron that is oblique to the axis on both sides, that is, the inner ring, is also called the arm ring, which can be compressed radially outwards, and it is called the non-solid part

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