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Film-riding aerodynamic seals for rotary machines
PATENTS
PATENTS UV-curable polythioetherbased sealants Applicant: Prc-Desoto International Inc, USA UV-curable sealants, together with methods for making and using them are disclosed by this patent. According to the inventor, the UV-curable sealants may be used in caps designed to seal fasteners in aerospace fuel tanks. They also may be used to smooth defects in surfaces. Patent number: WO/2014/066039 Inventor: B. Virnelson Publication date: 1 May 2014
Film-riding aerodynamic seals for rotary machines Applicant: General Electric Co, USA A seal assembly for a rotary machine has been developed. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of these segments includes a stator interface element. The segment also includes a shoe-plate that has one or more labyrinth teeth facing the rotor and a load-bearing surface region. The plate enables a high-pressure fluid to exist in an upstream portion of the forwardmost labyrinth tooth and low-pressure fluid to exist in a downstream portion of the aft-most labyrinth tooth. The sealing device segment further includes a secondary seal in contact with the stator interface element, at a radially outer end, and in contact with an elevated nose of the shoe-plate on a radially inner end; and multiple bellow springs, or flexures, attached to the shoe-plate and to the stator interface element. Patent number: WO/2014/070802 Inventors: R.A. Bidkar, M.M. Langenderfer, H.V. Deo and A.M. Thatte Publication date: 1 May 2014
pump and a system configured to generate a seal-flush mixture and supply this to the seal. Patent number: WO/2014/070876 Inventors: T. Nguyen and J.D. Hottovy Publication date: 1 May 2014
the surface area of the blade outer air seal. Patent number: WO/2014/070817 Inventors: D.A. Romanov, B. Duguay and R.E. Keene Publication date: 8 May 2014
Metal–elastomer seal
Method for machining a seal-mounting groove in a metal plate
Applicant: Federal-Mogul Sealing Systems GmbH, Germany This invention relates to a flat seal that is composed of a functional position (2) with at least one media passage opening (8 & 8’) and at least one combustion chamber passage opening (6 & 6’). A second position (4), which is separate from functional position (2), has media passage opening(s) (8 & 8’), corresponding to the media passage opening(s) (8 & 8’) of the functional position, and combustion chamber passage opening(s) (6 & 6’), corresponding to the combustion chamber passage opening(s) (6 & 6’) of the functional position. The latter has at least one combustion chamber sealing bead (10) for each combustion chamber passage opening (6 & 6’). This sealing bead is preferably solid, and the second position (4) has an outer edge sealing bead (12) and an elastomer sealing profile (18) for each media passage opening (8 & 8’). Patent number: WO/2014/067680 Inventor: M. Klinner Publication date: 8 May 2014
Blade outer air seal Applicant: United Technologies Corp, USA A blade outer air seal for a gas turbine engine is detailed by this patent. It includes first and second side surfaces, and a wall. The wall, which extends between the first side surface and the second side surface, contains one or more holes. These holes are spaced from the first side surface and/or the second side surface, and have areas between about 0.005% and 0.450% of
Applicant: NOK Corp, Japan A method has been developed for machining a seal-mounting groove in a metal plate. It makes it possible to form a seal-mounting groove at a low pressure, which simplifies production and lowers costs. It also overcomes the problem caused by the metal swelling because it is being plastically deformed with the formation of the seal-mounting groove. In order to achieve this objective, this invention provides a method for machining, under pressure, a sealmounting groove on the flat surface of a metal plate using a punch, the tip section of which has the shape of a sloped surface (inclined in the punch-width direction). Machining under pressure is performed by using the punch to form a seal-mounting groove shaped as a sloped surface in which a groove-bottom section is inclined in the width direction of the groove. The groove has a triangular (or a substantially triangular cross-sectional) shape that consists of the groove-bottom section shaped as a sloped surface, together with a groove lateral surface section and a groove opening section. Patent number: WO/2014/069171 Inventors: S. Koga and M. Sato Publication date: 8 May 2014
Seal with integral base material Applicant: NOK Corp, Japan This invention concerns a seal with a base material in which a gasket (12) is created. It is formed integrally with a film, sheet, or plate-shaped base material (11). This design saves space by making
Seal-flush system Applicant: Chevron Phillips Chemical Co Lp, USA Details of techniques are provided for a sealflush system. The system described may include a reactor pump that is configured to circulate slurry through a polymerisation reactor. The slurry may include an olefin monomer, a catalyst and a diluent. The system may also include a system configured to supply a catalyst-inhibiting additive to a seal in the reactor circulation
February 2015
A flat metal–elastomer seal with integrated dirt and media sealing capabilities forms the subject of patent WO/2014/067680.
Sealing Technology
13
PATENTS UV-curable polythioetherbased sealants Applicant: Prc-Desoto International Inc, USA UV-curable sealants, together with methods for making and using them are disclosed by this patent. According to the inventor, the UV-curable sealants may be used in caps designed to seal fasteners in aerospace fuel tanks. They also may be used to smooth defects in surfaces. Patent number: WO/2014/066039 Inventor: B. Virnelson Publication date: 1 May 2014
Film-riding aerodynamic seals for rotary machines Applicant: General Electric Co, USA A seal assembly for a rotary machine has been developed. The seal assembly includes multiple sealing device segments disposed circumferentially intermediate to a stationary housing and a rotor. Each of these segments includes a stator interface element. The segment also includes a shoe-plate that has one or more labyrinth teeth facing the rotor and a load-bearing surface region. The plate enables a high-pressure fluid to exist in an upstream portion of the forwardmost labyrinth tooth and low-pressure fluid to exist in a downstream portion of the aft-most labyrinth tooth. The sealing device segment further includes a secondary seal in contact with the stator interface element, at a radially outer end, and in contact with an elevated nose of the shoe-plate on a radially inner end; and multiple bellow springs, or flexures, attached to the shoe-plate and to the stator interface element. Patent number: WO/2014/070802 Inventors: R.A. Bidkar, M.M. Langenderfer, H.V. Deo and A.M. Thatte Publication date: 1 May 2014
pump and a system configured to generate a seal-flush mixture and supply this to the seal. Patent number: WO/2014/070876 Inventors: T. Nguyen and J.D. Hottovy Publication date: 1 May 2014
the surface area of the blade outer air seal. Patent number: WO/2014/070817 Inventors: D.A. Romanov, B. Duguay and R.E. Keene Publication date: 8 May 2014
Metal–elastomer seal
Method for machining a seal-mounting groove in a metal plate
Applicant: Federal-Mogul Sealing Systems GmbH, Germany This invention relates to a flat seal that is composed of a functional position (2) with at least one media passage opening (8 & 8’) and at least one combustion chamber passage opening (6 & 6’). A second position (4), which is separate from functional position (2), has media passage opening(s) (8 & 8’), corresponding to the media passage opening(s) (8 & 8’) of the functional position, and combustion chamber passage opening(s) (6 & 6’), corresponding to the combustion chamber passage opening(s) (6 & 6’) of the functional position. The latter has at least one combustion chamber sealing bead (10) for each combustion chamber passage opening (6 & 6’). This sealing bead is preferably solid, and the second position (4) has an outer edge sealing bead (12) and an elastomer sealing profile (18) for each media passage opening (8 & 8’). Patent number: WO/2014/067680 Inventor: M. Klinner Publication date: 8 May 2014
Blade outer air seal Applicant: United Technologies Corp, USA A blade outer air seal for a gas turbine engine is detailed by this patent. It includes first and second side surfaces, and a wall. The wall, which extends between the first side surface and the second side surface, contains one or more holes. These holes are spaced from the first side surface and/or the second side surface, and have areas between about 0.005% and 0.450% of
Applicant: NOK Corp, Japan A method has been developed for machining a seal-mounting groove in a metal plate. It makes it possible to form a seal-mounting groove at a low pressure, which simplifies production and lowers costs. It also overcomes the problem caused by the metal swelling because it is being plastically deformed with the formation of the seal-mounting groove. In order to achieve this objective, this invention provides a method for machining, under pressure, a sealmounting groove on the flat surface of a metal plate using a punch, the tip section of which has the shape of a sloped surface (inclined in the punch-width direction). Machining under pressure is performed by using the punch to form a seal-mounting groove shaped as a sloped surface in which a groove-bottom section is inclined in the width direction of the groove. The groove has a triangular (or a substantially triangular cross-sectional) shape that consists of the groove-bottom section shaped as a sloped surface, together with a groove lateral surface section and a groove opening section. Patent number: WO/2014/069171 Inventors: S. Koga and M. Sato Publication date: 8 May 2014
Seal with integral base material Applicant: NOK Corp, Japan This invention concerns a seal with a base material in which a gasket (12) is created. It is formed integrally with a film, sheet, or plate-shaped base material (11). This design saves space by making
Seal-flush system Applicant: Chevron Phillips Chemical Co Lp, USA Details of techniques are provided for a sealflush system. The system described may include a reactor pump that is configured to circulate slurry through a polymerisation reactor. The slurry may include an olefin monomer, a catalyst and a diluent. The system may also include a system configured to supply a catalyst-inhibiting additive to a seal in the reactor circulation
February 2015
A flat metal–elastomer seal with integrated dirt and media sealing capabilities forms the subject of patent WO/2014/067680.
Sealing Technology
13