A rotating turbomachine provided with a fluid sealing device, comprising an extensible/dilatable bellows piston to make a sealing surface abut against a rotor disc, or against the head of the shaft, therefore confining the working fluid in the turbomachine stopped during the respective maintenance operations, is described. A coolant is supplied inside the bellows piston during the normal operations of the machine.

The mechanical seal includes a housing through which a rotation shaft of a rotary machine extends, a stationary seal ring held by the housing, a rotating seal ring that rotates together with the rotation shaft 4 and is brought into sliding contact with the stationary seal ring, a spring that biases the rotating seal ring toward the stationary seal ring, a collar that holds the spring and is fixed to the rotation shaft, and a spring cover 60 that covers, in a sealed state, from a radially outer side, the spring and rotational components including the rotating seal ring, the spring cover being provided in a state in which it cannot move in the axial direction of the rotation shaft.

The invention relates to an mechanical seal arrangement, comprising a rotating slide ring (2) and a stationary slide ring (3) which define a sealing gap (4) in between them; a bellows unit (5) with a bellows element (50), a bellows support (51), and a slide ring support (52); wherein the bellows element (50) is connected in a fluid-tight manner to the bellows support (51) and the slide ring support (52); wherein the bellows unit (5) has a side that faces towards the product (7) and an atmospheric side (8); wherein the side of the bellows unit (5) that faces towards the product (7) has a non-stick coating (6); wherein the bellows element (50) is a metal bellows; and wherein the slide ring that is inserted into the slide ring support (52) of the bellows unit (5) is inserted loosely.

In an embodiment, a slide component includes a circular ring-shaped stationary-side seal ring 5 fixed to a stationary side and a circular ring-shaped rotating-side seal ring 3 rotating with a rotating shaft 1, and relatively rotates respective opposed sliding faces S of the stationary-side seal ring 5 and the rotating-side seal ring 3, thereby sealing a sealed fluid present on one side in a radial direction of the sliding face relatively rotating and sliding, wherein the sealed fluid is a silicate containing fluid; and on at least either one sliding face of the stationary-side seal ring 5 and the rotating-side seal ring 3, an amorphous carbon film 10 formed by using hydrocarbon gas not containing organosilicon compound gas in a plasma CVD method is laminated. The slide component can seal a silicate containing sealed fluid to which silicate is added.

The present disclosure relates to a bellows seal arrangement having a bellows designed with a controlled shift in effective mean diameter when the bellows is exposed to a pre-determined pressure.

In a bellows mechanical seal, a collar attached to a seal ring through a bellows has a restriction piece extending toward at least one of an inner diameter side or an outer diameter side. The bellows mechanical seal includes an adaptor which is attached to the collar, whose axial movement is restricted by the restriction piece, and which extends to the inner diameter side or the outer diameter side over the restriction piece. The collar and the adaptor form at least part of a housing space (S), (S) having the secondary seal housed therein.

A flexible metal seal assembly for isolating one or more fluids in an operative region of a machine comprises a first flexible metal seal and a second flexible metal seal arranged in series, allowing the additional exertion of a spring bias. The inner surface of the first flexible metal seal is restrainably and hermetically attached to the outer surface of a metallic coupler, while the outer surface of the second flexible metal seal is restrainably and hermetically attached to the inner surface of the metallic coupler. Amongst other applications, the assembly may be used in a valve seal, or in an engine fuel pump, where it serves to isolate lubricating oil from fuel, or one fluid from a region, where one fluid may be present on an actuator that reciprocates within the second flexible metal seal or outside of the first flexible metal seal.

The present invention relates to a gasket, a magnetic switch of a starter including the same, and a starter including the magnetic switch, the gasket including: a membrane which carries out a sealing function and is made of a resin material having flexibility; and a membrane washer provided along the edge of the membrane in order to prevent bending of the membrane, wherein the membrane and the membrane washer are insert injected. Unlike prior art, the present invention can enhance the durability of the membrane by insert injection molding a hard membrane washer into the membrane having flexibility, can enhance a waterproofing performance by enabling the membrane to be firmly fixed to a plunger, and can enhance an assembly performance by enabling assembly through an automatic production line.

The invention relates to a mechanical seal arrangement, comprising a rotating slide ring (2) and an stationary slide ring (3), which delimit a sealing gap (4) in between them, wherein the rotating slide ring (2) has a radially inward facing ledge (20) with a contact surface (21), a bellows element (10) for refitting the rotating slide ring (2) in an axial direction (X-X) of the mechanical seal arrangement, and a release protection device (5) for the rotating slide ring (2), wherein the release protection device (5) comprises an inner sleeve (6) with a radially outward facing web (60) that restricts a movement of the rotating slide ring (2) in the axial direction (X-X), and wherein the rotating slide ring (2) is arranged on the inner sleeve (6) so as to be freely movable in the axial direction (X-X).

A non-collapsible flexible sealing membrane (or bellows) for incorporation in a mechanical seal assembly and use in rotary shaft equipment. The sealing membrane includes a substantially radially outward extending first flange portion, which can be urged into an axially shiftable ring by a biasing mechanism. The sealing membrane further includes a substantially axially outboard extending second coaxial portion, substantially radially inward of the balance diameter of the seal. The horizontal portion is advantageously held fixed to a stub sleeve by an annular band. The angle between the vertical portion and the horizontal portion of sealing membrane enables directional control of the forces acting on stub sleeve and primary ring.