A sealing system which is designed to leverage the centrifugal acceleration of solids and liquids due to the natural rotation of the roller, expelling them outside, preventing most of the contamination from trying to penetrate the roller seals. Excess of contaminants that is not centrifugally expelled is blocked by the following internal sealing system.

A seal assembly for a rotary machine, such as a turbine engine, may include a seal rotor comprising a rotor face, a seal slider comprising a slider face, a seal stator, wherein the seal slider is slidably coupled to the seal stator, and wherein the slider face and the rotor face define a primary seal. The seal slider may be configured to slidably engage and retract the slider face with respect to the rotor face. The seal assembly may further include a secondary seal disposed between the seal slider and the seal stator. The secondary seal may be configured to compress and rebound and/or to expand and rebound, over at least a portion of a range of motion of the seal slider.

A sealing device, sealing assembly and an apparatus having a rotation shaft that uses the sealing assembly. The sealing assembly includes a rotating shaft seal and a sealing device. The rotating shaft seal has a ring shaped body with the rotating shaft passing through it and a sealing portion forming a dynamic sealing cooperation with the rotating shaft. The sealing device includes a ring shaped body with the rotating shaft passing through it, and includes first and second ring shaped portions spaced apart from each other in an axial direction. The first ring shaped portion defines a static sealing surface forming a static sealing cooperation with the rotating shaft, and the second ring shaped portion defines a dynamic sealing surface forming a dynamic sealing cooperation with a portion of the rotating shaft seal adjacent to the sealing portion of the rotating shaft seal.

A rotary actuator includes: an electric motor; a case that receives the electric motor; a rotatable body that is configured to transmit an output of the electric motor to an outside of the case; a seal member that seals between the rotatable body and the case; and a labyrinth forming portion that forms a labyrinth space in a path that extends from an outside space of the case to a sealing point of the rotatable body, at which the rotatable body is sealed by the seal member.

A sealing arrangement is provided between inner and outer coaxial ring-shaped walls of an aircraft engine. The outer wall has an axial end with a U-shaped cross-section parallel to axis, the opening therein being oriented axially in a first direction. The inner wall has an axial end with a U-shaped cross-section parallel to axis, the opening therein being oriented axially in the opposite direction. The U-shaped end of the outer wall includes a ring-shaped free edge axially engaged in the opening in the axial end of the inner wall. The U-shaped end of the inner wall includes a ring-shaped free edge axially engaged in the opening in the axial end of the outer wall. The walls define therebetween a ring-shaped gas channel having a substantially S-shaped axial cross-section.

A split plummer block bearing housing for a rotatable shaft includes a detachable housing cap, which includes at least one housing grease channel, and at least one seal assembly. The seal assembly includes a stationary part, which has a seal grease channel and is mounted on the housing, and a rotating part that is configured to be mounted on the shaft. The stationary part and the rotating part are configured to cooperate with each other as a labyrinth and/or contacting seal, and the housing grease channel and the seal grease channel connect and form an extension of each other.

Aspects of the disclosure are directed to a sealing system for an engine having an axial centerline, comprising: a stationary carbon segment, and a seal plate that rotates when the engine is operated, where the seal plate includes an end face that is opposed to an interface between the carbon segment and the seal plate, and where the end face includes at least one groove that conveys a liquid cooling fluid.

A bladed assembly for a turbine of a turbomachine comprises an outer platform comprising, at an axial end, a transverse end surface and a sealing device protruding from the transverse end surface and comprising at least two sealing ribs (102) extending transversely to an axis of the bladed assembly and each having two respective sides which, in an axial cross-section, are radially and axially inclined in the same direction with respect to the axis. The radial direction of the inclination of the sides of the sealing ribs, in an axial cross-section, is the same for at least two of the sealing ribs. This particularity confers flexibility on each of the sealing ribs, which allows to favour a surface contact between the sealing ribs and a radial stator wall facing which the transverse end surface, and in particular the sealing device, are intended to be arranged.

A rotary tube kiln, with a rotatably mounted rotary tube, which has a motorized drive, a mounting, a material inlet and a material outlet, wherein the interior space of the rotary tube has a process space, the inside atmosphere of which is separate from the outside atmosphere. The process space is sealed off from a pressure space by means of a first seal and the pressure space is sealed off from the outside atmosphere by means of a second seal and, by means of a pressing device, a first pressing force can be applied to the first seal and a second pressing force can be applied to the second seal, the first pressing force can be set independently of the second pressing force and, during operation, the internal pressure of the pressure space is higher than the internal pressure of the process space.

A sealing device for a bearing unit having an axis of rotation and providing; a static component placed on a non-rotatable outer ring having a reinforcement support that abuts the outer ring and elastomeric material disposed on the reinforcement support, the elastomeric material forming first and second lips; a rigid shield configured for placement on one of a rotatable hub and a rotatable inner ring; the first and second lips have an equilibrium position where they do not contact the metallic shield; the elastomeric material forming a third lip that contacts the rigid shield to form an internal volume of the sealing device, the second lip and the rigid shield define a labyrinth seal in communication with the internal volume; the second lip, does not extend a full three hundred sixty degrees around the axis of rotation. This creates a channel for drainage of contaminants from the internal volume.