Abstract: 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.

Abstract: A hydrostatic seal assembly includes a seal carrier, a seal shoe located at the seal carrier and configured for travel relative to the seal carrier to maintain a selected gap between the seal shoe and a rotating component, and a travel stop. The travel stop includes a stop rib located at one of the seal carrier or the seal shoe, and a stop groove located at the other of the seal carrier or the seal shoe. The stop rib is positioned at least partially in the stop groove to limit travel of the seal shoe relative to the seal carrier.

Abstract: 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.

Abstract: A seal arrangement may comprise a seal comprising an outer ring, a shoe, and an arm extending between the shoe and the outer ring, wherein the shoe moves relative to the outer ring via the arm, a seal ring adjacent the seal, and a support plate disposed between the seal and the seal ring, wherein the support plate moves together with the shoe in a radial direction relative to the seal ring.

Abstract: A hydrostatic seal assembly includes a seal support, a seal shoe integral to the seal support and radially movable relative to the seal support. A plurality of seal teeth are located at a radially inboard surface of the seal shoe. The seal shoe is formed from a first material and the radially inboard surface is formed from a second material softer than the first material such that the radially inboard surface is abradable in the event of a rub between the radially inboard surface and an adjacent rotating component.

Abstract: An outer seal structure for a rotor assembly includes a stator structure and a non-contact seal assembly. The non-contact seal assembly is fixed relative to the stator structure and includes a plurality of seal shoes, a seal base, a plurality of spring elements, and a shoe support plate. The plurality of seal shoes are arranged about an axis in an annular array. The seal base circumscribes the annular array of the plurality of seal shoes. Each of the plurality of spring elements extend radially between a respective seal shoe of the plurality of seal shoes and the seal base. The shoe support plate is arranged about the axis and mounted to the stator structure and includes a plurality of shoe support tabs extending axially from the shoe support plate. Each shoe support tab of the plurality of shoe support tabs is disposed between each seal shoe.

Abstract: An apparatus for sealing a circumferential gap between a stationary component and a rotating member is disclosed. The rotating member is configured to rotate about a longitudinal axis and has a radially outer surface disposed at a first non-zero angle with respect to the longitudinal axis. The apparatus includes a stator disposed circumferentially about the longitudinal axis and a shoe configured for translation in a radial direction with respect to the stator. The shoe includes a circumferential surface and a plurality of protrusions extending radially inward from the circumferential surface toward the rotating member, each one of the plurality of protrusions having a length configured to maintain a clearance gap with respect to the rotating member.

Abstract: A hydrostatic seal assembly for a gas turbine engine includes a shoe movable radially relative to a longitudinal engine axis. At least one beam supports radial movement of the shoe. A secondary seal is fixed relative to the shoe. A rail is attached to the shoe and in sealing engagement with the secondary seal. A gas turbine engine and a method of creating a seal with a hydrostatic seal are also disclosed.

Abstract: A seal according to the present disclosure includes a plate, and a floating shoe supported with respect to the plate in a first direction. The floating shoe has a sealing feature extending in a second direction perpendicular to the first direction. At least one bearing is between the plate and the floating shoe. The bearing is configured to facilitate movement of the floating shoe with respect to the plate in the second direction. A gas turbine engine including the seal and a method of sealing a rotating component with respect to a stationary component are also disclosed.

Abstract: A seal assembly includes first and second rings. The first ring includes a first outer ring, a first beam connected to the first outer ring, and a first shoe. The first shoe includes free and fixed ends and is configured to move radially. The second seal ring is disposed axially adjacent and is attached to the first seal ring. The second seal ring includes a second outer ring, a second beam connected to the second outer ring, and a second shoe. The second shoe includes free and fixed ends and is configured to move in a generally radial direction. The free end of the second shoe is disposed axially adjacent to the fixed end of the first shoe. The fixed end of the second shoe is disposed axially adjacent to the free end of the first shoe.

Abstract: An outer seal structure for a rotor assembly includes a stator structure and a non-contact seal assembly. The non-contact seal assembly is fixed relative to the stator structure and includes a plurality of seal shoes, a seal base, a plurality of spring elements, and a shoe support plate. The plurality of seal shoes are arranged about an axis in an annular array. The seal base circumscribes the annular array of the plurality of seal shoes. Each of the plurality of spring elements extend radially between a respective seal shoe of the plurality of seal shoes and the seal base. The shoe support plate is arranged about the axis and mounted to the stator structure and includes a plurality of shoe support tabs extending axially from the shoe support plate. Each shoe support tab of the plurality of shoe support tabs is disposed between each seal shoe.

Abstract: A seal arrangement may comprise a seal comprising an outer ring, a shoe, and an arm extending between the shoe and the outer ring, wherein the shoe moves relative to the outer ring via the arm, a seal ring adjacent the seal, and a support plate disposed between the seal and the seal ring, wherein the support plate moves together with the shoe in a radial direction relative to the seal ring.

Abstract: A hydrostatic seal assembly includes a seal support, a seal shoe integral to the seal support and radially movable relative to the seal support. A plurality of seal teeth are located at a radially inboard surface of the seal shoe. The seal shoe is formed from a first material and the radially inboard surface is formed from a second material softer than the first material such that the radially inboard surface is abradable in the event of a rub between the radially inboard surface and an adjacent rotating component.

Abstract: A hydrostatic seal assembly for a gas turbine engine includes a shoe movable radially relative to a longitudinal engine axis. At least one beam supports radial movement of the shoe. A secondary seal is fixed relative to the shoe. A rail is attached to the shoe and in sealing engagement with the secondary seal. A gas turbine engine and a method of creating a seal with a hydrostatic seal are also disclosed.

Abstract: An apparatus for sealing a circumferential gap between a stationary component and a rotating member is disclosed. The rotating member is configured to rotate about a longitudinal axis and has a radially outer surface disposed at a first non-zero angle with respect to the longitudinal axis. The apparatus includes a stator disposed circumferentially about the longitudinal axis and a shoe configured for translation in a radial direction with respect to the stator. The shoe includes a circumferential surface and a plurality of protrusions extending radially inward from the circumferential surface toward the rotating member, each one of the plurality of protrusions having a length configured to maintain a clearance gap with respect to the rotating member.

Abstract: A seal according to the present disclosure includes a plate, and a floating shoe supported with respect to the plate in a first direction. The floating shoe has a sealing feature extending in a second direction perpendicular to the first direction. At least one bearing is between the plate and the floating shoe. The bearing is configured to facilitate movement of the floating shoe with respect to the plate in the second direction. A gas turbine engine including the seal and a method of sealing a rotating component with respect to a stationary component are also disclosed.

Abstract: A seal assembly includes first and second rings. The first ring includes a first outer ring, a first beam connected to the first outer ring, and a first shoe. The first shoe includes free and fixed ends and is configured to move radially. The second seal ring is disposed axially adjacent and is attached to the first seal ring. The second seal ring includes a second outer ring, a second beam connected to the second outer ring, and a second shoe. The second shoe includes free and fixed ends and is configured to move in a generally radial direction. The free end of the second shoe is disposed axially adjacent to the fixed end of the first shoe. The fixed end of the second shoe is disposed axially adjacent to the free end of the first shoe.