Eagle Industry Co., Ltd.

Eagle Engineering Aerospace Co., Ltd.

Jun Hiromatsu

Hidetoshi Kasahara

Yuichiro Tokunaga

Wataru Kimura

Tetsuya Iguchi

Toru Kono

Yoshiaki Takigahira

Takafumi Ota

Hideyuki Inoue

Yasuhiro Kuroki

Ryu Kikuchi

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes inclined grooves formed at a sliding surface so as to be arranged in a circumferential direction, the inclined grooves being open on an outer diameter side of the seal ring to generate a drawing pressure. The seal ring further includes supply grooves being open on a sealed fluid side of the seal ring and extending in a radially outward direction toward inner diameter sides of the inclined grooves.

Seal ring

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes multiple static pressure grooves provided at a sliding surface of the seal ring and arranged in a circumferential direction, the static pressure grooves being opened on a sealed fluid side and closed on an outer diameter side, a circumferential length of each of the static pressure grooves being shorter than a radial length of each of the static pressure grooves.

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes; inclined grooves formed at a sliding surface so as to be arranged in a circumferential direction, the inclined grooves being closed on an outer diameter side thereof and configured to generate a dynamic pressure; and supply grooves opening on a sealed fluid side and communicating with an inner diameter side of the inclined grooves.

In an exemplary embodiment, a seal device () that seals between a housing () and a rotation shaft () passing through the housing () includes: a floating ring () arranged with a gap h with respect to the rotation shaft (), a seal portion () formed by bringing one end face of the floating ring () into contact with the housing (), and a space portion j provided between the floating ring () and the housing (), and the floating ring () includes bias means that contactlessly biases the floating ring () to the seal portion via the space portion j. The seal device in which the floating ring follows movement of the rotation shaft is capable of exerting a sealing operation so that vibration of the rotation shaft can be reduced.

Seal device

Provided is a seal ring configured so that a fluid film can be formed between sliding surfaces across a wide range of rotation speed and configured with high lubricity. A seal ring for sealing a clearance between a rotary shaft and a housing includes, dynamic pressure grooves formed at a sliding surface of the seal ring and having positive pressure generators and negative pressure generators, and static pressure supply paths formed at the sliding surface of the seal ring to extend from an inner diameter side to an outer diameter side and to open on a sealed fluid side. Each of the positive pressure generators, each of the negative pressure generators, and each of the static pressure supply paths are arranged in description order in a circumferential direction of the sliding surface.

A sealing device includes a floating ring in a space between the outer circumference of a rotating shaft and the inner circumference of a housing, and a multi-layered cylindrical body including a plurality of elastically deformable cylindrical thin plates layered on top of each other provided between an outer peripheral surface of the floating ring and an inner peripheral surface of the housing, so as to impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.

In an exemplary embodiment, a seal devicethat seals between a housingand a rotation shaftpassing through the housingincludes a floating ringarranged with a gap h with respect to the rotation shaft, wherein the floating ringincludes at least one supporting meansthat supports in the circumferential direction. In the seal device, the floating ring follows movement of the rotation shaft even upon running for a long time, a clearance between the rotation shaft and the seal ring can be properly held, and the sealing operation by the floating ring and the vibration damping function can be exerted, and the seal device is easily assembled.

A seal device includes a first seal portion, a second seal portion, and a joint base, wherein the first seal portion has a first elastic portion with a flat side surface at one side of a first bight portion and a second elastic portion at the other side of the first bight portion. The second seal portion has a first symmetrical elastic portion with a flat side surface at one side of a second bight portion and a second symmetrical elastic portion at the other side of the second bight portion. A first seal face is disposed on a first outmost circumferential surface of the first elastic portion, and a second seal face is disposed on a second outmost circumferential surface of the first symmetrical elastic portion.

Primary objective of the present invention is to provide a seal device wherein the seal surfaces of the device are always brought into close contact against the side walls of the mounting slot regardless of fluid conditions. The seal device has two seal portions located to both sides of a bight shaped elastic portion which has a 'U'-shaped cross section wherein the respective seal portions have a first side portion and a second side portion. The second side portions of the seal portions abut against each other in a symmetric manner in order to form a 'W'-shaped seal body element. The end portions of the both second side portions of the seal body element are joined and seal surfaces are defined on the outer side surfaces of the both first side portions.

Primary objective of the present invention is to effect a seal against assembly clearances formed between components which admit flows of high temperature fluids or are subjected to vibrations. The seal device is comprised of a supporting member which has a first seal protrusion and a second seal protrusion wherein the seal protrusion is brought into sealing contact with a second slot surface of the one component, wherein the second seal protrusion is brought into sealing contact with a second symmetric slot surface of the other component, a retaining member which protrudes from the supporting member, a first seal member which includes a second side portion, a bight-shaped first elastic portion and a first side portion wherein the second side portion is fixed to the side wall of the retaining member, wherein the first side portion is at an angle, wherein the first seal member has a sheet form, a second seal member which includes a second side portion, a bight-shaped first elastic portion and a first side portion wherein the second side portion is fixed to the side wall of the retaining member, wherein the first side portion is at an angle, wherein the first seal member has a sheet form, wherein the second seal member is arranged symmetrically to the first seal member, a first seal surface which is defined at a distal end portion of the outer side surface of the first side portion wherein the first seal surface is brought into sealing contact with a first slot surface of the one component, and a second seal surface which is defined at a distal end portion of the outer side surface of the first side portion wherein the first seal surface is brought into sealing contact with a first symmetric slot surface of the other component, wherein the end sections of the both second side portions are fixed to the retaining member.

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Tokyo, Japan

Jun Hiromatsu