Abstract: A seal assembly is disclosed for sealing a high pressure fluid cavity from a low pressure fluid cavity. The cavities are at least partially disposed between a rotatable shaft and a sump housing. The seal assembly comprises a circumferential runner and a seal ring. The circumferential runner is carried by the shaft and has a radially outward facing seal surface extending axially along the shaft. The seal ring is sealing engaged with the sump housing and has a radially inward facing seal surface that sealingly engages the radially outward facing seal surface of the runner. The runner and the seal ring are formed from materials having coefficients of thermal expansion that are matched to effect sealing engagement between the runner and the seal ring over a predetermined range of operating temperatures.

Abstract: An aspect of the present disclosure is directed to a seal assembly. The seal assembly includes a fluid bearing wall including a bearing face defining a fluid opening through the fluid bearing wall. The seal assembly further includes a tilt member is extended from and attached to the fluid bearing wall. The tilt member defines a fluid passage therethrough in fluid communication with the fluid opening at the bearing face of the fluid bearing wall. The seal assembly still further includes a seal body surrounding the tilt member. A cavity is defined between the tilt member and the seal body. The seal assembly further includes a spring member coupled to the seal body and the fluid bearing wall. A passage is defined between the fluid bearing wall and the seal body.

Abstract: A shaft seal for disposition between a shaft mounted for rotation and a bore includes a radial shaft-sealing sleeve assembly rotatably mounted with an outer carrier assembly. The radial shaft-sealing sleeve assembly includes a radial shaft-sealing sleeve and a first contact exclusion lip. The outer carrier assembly includes an outer carrier with a molded seal along having an outer radial section of the outer carrier and an elongated molded seal lip extending into a chamber formed between the radial shaft-sealing sleeve and the outer carrier, a second contact exclusion lip, and a main pumping lip. The first contact exclusion lip forming a dynamic seal against the outer carrier, and the second contact exclusion lip and main pumping lip forming dynamic seals against the radial shaft-sealing sleeve.

Abstract: Provided is a seal device configured to prevent leakage of a fluid on an outer circumferential surface of a rotary shaft in a direction along an axis of the rotary shaft. The seal device includes an annular main body section disposed in a circumferential direction of the rotary shaft, and a plurality of at least two kinds of holes formed in an inner circumferential surface of the main body section opening and facing to the outer circumferential surface of the rotary shaft, and having different depths.

Abstract: A seal assembly is for sealing a clearance space about a shaft, the shaft being rotatable about a central axis, and includes a generally annular sealing member disposed about the shaft. The sealing member is radially deflectable between an inner position and an outer position, the sealing member sealing the clearance space when located at the inner position. A generally annular rotor is disposed about and rotatably coupled with the shaft, the rotor having a generally annular cavity sized to receive the sealing member and at least one and preferably a plurality of lift passages extending at least partially radially through the rotor. Each lift passage has an inner port fluidly coupled with the cavity and an outer port fluidly coupled with an exterior atmosphere such that suction generated within the lift passages when the rotor angularly displaces about the axis generally retains the sealing member at the outer position.

Abstract: A seal device, which accommodates axial displacement between a housing and shaft of an item of rotating equipment, includes a stator which locates into the housing of a piece of rotating equipment. A first rotor locates on the shaft of the rotating equipment and a second rotor is rotationally coupled to the first rotor with the first rotor being permitted to axially float with respect to the second rotor. The device provides sealing integrity when the shaft is both idle and operational. The sealing device may be used, for instance, in a double ended centrifugal pump where shaft displacement occurs from thermal expansion.

Abstract: A shaft sealing assembly for static and dynamic axial sealing of a centrally located rotating and movable shaft is provided. The assembly includes at least one first sealing member for sealing said shaft, at least one rotor member-attached to said shaft, and a stator member attached to a housing. A first sealing member is arranged in a recess in said rotor member effectively sealing one side of the assembly from its other side when a pressure difference exists between the media on the two sides of the assembly. Upon rotation of the shaft, the static sealing member is centrifugally moved axially and radially away from its static sealing position and friction between the sealing member and the stator is eliminated. Dynamic sealing is affected by a pressure difference caused by a turbine effect of the rotor member.

Abstract: In a centrifugal pump, a barrier ring in the form of a dynamic seal member is interposed between relatively rotating, generally circular wall portions which undergo relative axial movement to vary the width of a gap between the wall portions, the seal member having an outer jacket of flexible material and an annular spring member of frustoconical configuration inserted into offset grooves in the jacket, and when the seal member is mounted under compression between the confronting surfaces will follow the relative axial movement between the wall portions to maintain liquid-tight sealing engagement with the wall portions. In a modified form of invention, the seal member includes a pair of helical spring members inserted into grooves in an outer flexible jacket and, when the seal is mounted under compression between confronting surfaces of the wall portions as described will maintain liquid-tight sealing engagement notwithstanding variations in the width of the gap between members.