An assembly is provided for rotational equipment. This assembly includes a seal device, a ring structure and a fastener. The seal device includes a plurality of seal shoes, a seal base and a plurality of spring elements. The seal shoes are arranged around a centerline in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the annular array. The spring elements include a first spring element. The first spring element connects and extends between the first seal shoe and the base. The ring structure is axially adjacent the seal device. The ring structure includes a fastener aperture extending axially through the ring structure. The fastener is mated with the fastener aperture and abutted axially against the seal device.

Disclosed is a turbine apparatus. The turbine apparatus includes stator, a rotor rotatably installed in the stator, and a sealing mechanism provided to prevent a working fluid from leaking between the stator and the rotor. The sealing mechanism is configured such that when the rotor is stopped, the sealing mechanism is brought into contact with the rotor, and when the rotor is rotated, the sealing mechanism is formed to be spaced from the rotor by a predetermined gap.

A gap seal device includes a housing with a fluid-filled guiding chamber and a multi-part piston that is translationally and/or rotationally moveable in the guiding chamber. The piston separates a high-pressure region from a low-pressure region of the guiding chamber. The piston forms an annular gap having a nominal gap width with an inner wall delimiting the guiding chamber. The piston has a stepped rod, a sleeve, which is slipped over a stepped-down region of the rod and which has a blind hole, and a coupling. The stepped-down region of the rod or in a tube portion of the sleeve includes a stiffness change. A gap width of the annular gap that is reduced compared with the nominal gap width can be set in a region radial to the stiffness change by stress-caused expansion of an outside diameter of the tube portion of the sleeve in accordance with the set stressing force.

An assembly is provided for rotational equipment. This rotational equipment assembly includes a plurality of seal shoes, a seal base, a plurality of spring elements and a secondary seal assembly. The seal shoes are arranged circumferentially about an axial centerline in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the annular array. The spring elements include a first spring element. The first spring element connects and extends between the first seal shoe and the seal base. The secondary seal assembly is configured to seal a gap between the seal base and the seal shoes. An axial end portion of the first seal shoe projects axially along the axial centerline, in a direction away from the first spring element, beyond the secondary seal assembly.

A pump assembly may include a rotor having a rotor shaft portion; a stator having a bore portion defining a bore for receiving the rotor shaft portion; and a circumferential protrusion extending radially into the bore between the bore portion and the rotor shaft portion, wherein at least one of the protrusion and a corresponding surface of the rotor shaft portion or the bore portion is configured to be abraded by the other upon experiencing contact therewith. In this way, the gap between the bore portion and the rotor shaft portion may be at least partially filled by the circumferential protrusion in order to provide a seal. The protrusion and one of the bore portion and the rotor shaft portion may be formed from different hardness materials.

A hydrostatic advanced low leakage seal configured to be disposed between relatively rotatable components. The seal includes a base. The seal also includes a shoe extending circumferentially. The seal further includes a first beam operatively coupling the shoe to the base, the first beam having a first thickness. The seal yet further includes a second beam operatively coupling the shoe to the base, the second beam having at least a portion thereof with a second thickness that is less than the first thickness.

A hydrostatic seal assembly configured to be disposed between relatively rotatable components includes a base. The seal also includes a shoe operatively coupled to the base. The seal further includes a secondary seal disposed proximate an axially forward end of the shoe, the secondary seal extending radially from a radially inner end to a radially outer end to define a radial distance of the secondary seal, the secondary seal having an axially forward face. The seal yet further includes a structural component located adjacent to the axially forward face of the secondary seal and extending radially inwardly to cover at least half of the radial distance of the secondary seal.

An assembly is provided for rotational equipment. This assembly includes a plurality of seal shoes, a seal base and a spring system. The seal shoes are arranged about a centerline in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the seal shoes. The spring system connects the seal shoes to the seal base. The spring system includes a first spring element and a second spring element. The first spring element extends axially along the centerline in a first axial direction from the seal base to the first seal shoe. The second spring element extends axially along the centerline in a second axial direction from the seal base to the first seal shoe. The second axial direction is opposite the first axial direction.

The present invention relates to a method for continuously manufacturing an abradable sealing element, this element comprising a support substrate covered by a coating comprising at least two successive layers, each comprising a sublayer of abradable material and a sublayer of erosion-control material. This method is noteworthy in that it comprises the steps consisting in: —a) placing at least one support substrate on a rotary carousel around which are placed at least two thermal spray torches enabling the sublayer of abradable material and that of erosion-control material to be deposited, —b) rotating the carousel so as to bring said support substrate successively opposite one then the other of the two torches and to carry out the deposition of the various sublayers and to repeat this operation so as to obtain said sealing element.

An assembly is provided for rotational equipment. The assembly includes a plurality of seal shoes, a seal base and a plurality of spring elements. The seal shoes are arranged around an axis in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the annular array of seal shoes. The spring elements include a first spring element. The first spring element is radially between and connects the first seal shoe and the seal base. The first seal shoe extends circumferentially about the axis between a first end and a second end. The first seal shoe extends radially between an inner side and an outer side. The first seal shoe is configured with a chamfered corner at an interface between the first end and the inner side.