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Seal element guide
PATENTS than the width (34) of the second portion (32). The first and second portions are at least partially bent downwards such that the upper side forms a convex surface portion (41 & 42) whilst the lower side is concave (43 & 44). Patent number: WO/2014/001084 Inventor: P. Headland Publication date: 3 January 2014
stack comprises a fore seal-plate and aft seal-plate, and a bearing mount situated axially between them. The bearing sleeve surrounds at least a portion of the rotor shaft and is configured to form an insulating air-gap between the rotor shaft and bearing stack. The support bearing is fixed on the bearing mount to couple the gas-turbine rotor shaft to a stationary structure, thereby centring and retaining the gas-turbine rotor shaft. Patent number: WO/2014/004491 Inventor: M.J. Muldoon Publication date: 3 January 2014
to the inventors, this composition is capable of maintaining excellent elasticity even after being used for a long period under high pressure and temperature. The composition comprises a rubber component and thermoplastic resin. The maximum value of the loss tangent (tan ) in the temperature range of 20–150°C is 0.2 or less, say the inventors. Patent number: WO/2014/002582 Inventors: A. Oowada and H. Ito Publication date: 3 January 2014
Anti-swirl device Ceramic matrix composite
A platform seal strip (1), for use, in particular, in a gas-turbine blade assembly is described by patent WO/2014/001084. This design has the advantage that inter-seal leakage between, for example, two adjacent blade platforms can be overcome by using a single-piece seal strip.
Seal element guide Applicant: Weatherford/Lamb Inc, USA A pressure-control apparatus and methodology related to a drilling operation form the subject of this patent. The apparatus has a housing, for example, a bearing assembly that is configured to engage an item of oilfield equipment. The housing has an upper and/or a lower portion, with a seal element coupled to these portions, and configured to seal around the item of oilfield equipment. A guide is coupled proximate to the seal element. This guide is configured to support and/or limit lateral deflection of the seal element during movement of oilfield equipment. Patent number: WO/2014/004516 Inventors: T.F. Bailey and J.W. Chambers Publication date: 3 January 2014
Sleeve for turbine bearing stack Applicant: United Technologies Corp, USA This invention relates generally to turbo-machinery, but specifically to bearing-protection structures. In particular, it concerns a thermal protection sleeve for gas-turbine radial support bearings. The patent focuses on a support bearing arrangement – a gas-turbine rotor shaft, bearing stack, bearing sleeve and support bearing. The bearing
July 2014
Applicant: General Electric Co, USA This patent provides details of a ceramic matrix composite (CMC) component and a method of attaching a static seal to it. Disadvantages associated with attaching a CMC to metallic hardware are the wear of the metallic hardware by the hard, abrasive ceramic material surface, and the lack of load distribution in the CMC. According to this patent, the CMC component includes first and second ends. A CMC metal interface member is attached to the second end. This interface member is capable of being joined to a static seal in a gas turbine. The inventors say this approach aims to provide a method for attaching a metal seal to a CMC component that does not suffer from the drawbacks mentioned. Patent number: WO/2014/004017 Inventors: J.H. Grooms, D.G. Senile, R.A. Frederick and C.T. McMillan Publication date: 3 January 2014
Valve apparatus with multi-layer seal structure Applicant: SDD Co Ltd, Korea This invention relates to a valve apparatus with a multi-layer seal structure comprising a body, plug, cage and cage adapter. When the plug descends to enable the valve to be closed, a high-pressure fluid is sealed in multiple layers in a gap between the plug and the cage adapter, thereby effectively blocking the leakage of the fluid. The plug and cage do not come into contact with each other, which means that damage to the expensive cage can be prevented. Patent number: WO/2014/003461 Inventors: Y.B. Kim, K.J. Kwon, G.C. Son and J.H. Kim Publication date: 3 January 2014
Resin composition and seal member Applicant: Kabushiki Kaisha Riken, Japan Details are provided of a resin composition and a seal member that is based on it. According
Applicant: Flowserve Management Co, USA A device has been developed to limit prerotation of fluid across regions of turbomachinery where significant pressure differentials exist between rotating and non-rotating components. In one form, this invention is particularly applicable to centrifugal-based turbo-machinery. Of particular concern is that highly-energised fluid exiting an impeller, or related rotating member, can impart significant swirl velocity and related rotor-dynamic forces which, in turn, may affect rotor stability. The potential for such instability is particularly high when flow coming from an impeller discharge permeates a seal, bushing or related component that is used to separate the impeller from an upstage partition. This invention replaces traditional bushing seal designs at swirl-prone regions with a vaned anti-swirl bushing that fits within the housing without increasing its axial or radial dimensions. Patent number: WO/2014/004628 Inventor: D. Adams Publication date: 3 January 2014
Pipe-repair clamp assembly Applicant: Victaulic Co, USA A clamp assembly for repairing a leak caused by a hole in a pipe element is detailed by this patent. The assembly has first and second arcuate segments that can be attached to one another, end to end. First and second connection members that are adjustable and can be tightened are positioned at each end of the first and second segments to form first and second segment joints. First and second seals are positioned between the segments and the pipe element on opposite sides of the hole, and first and second sealing plates are located at the segment joints and positioned between the segments and the pipe element to form a seal at each segment joint. Patent number: WO/2014/004834 Inventors: W.M. Biery and A. Klath Publication date: 3 January 2014
Sealing Technology
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stack comprises a fore seal-plate and aft seal-plate, and a bearing mount situated axially between them. The bearing sleeve surrounds at least a portion of the rotor shaft and is configured to form an insulating air-gap between the rotor shaft and bearing stack. The support bearing is fixed on the bearing mount to couple the gas-turbine rotor shaft to a stationary structure, thereby centring and retaining the gas-turbine rotor shaft. Patent number: WO/2014/004491 Inventor: M.J. Muldoon Publication date: 3 January 2014
to the inventors, this composition is capable of maintaining excellent elasticity even after being used for a long period under high pressure and temperature. The composition comprises a rubber component and thermoplastic resin. The maximum value of the loss tangent (tan ) in the temperature range of 20–150°C is 0.2 or less, say the inventors. Patent number: WO/2014/002582 Inventors: A. Oowada and H. Ito Publication date: 3 January 2014
Anti-swirl device Ceramic matrix composite
A platform seal strip (1), for use, in particular, in a gas-turbine blade assembly is described by patent WO/2014/001084. This design has the advantage that inter-seal leakage between, for example, two adjacent blade platforms can be overcome by using a single-piece seal strip.
Seal element guide Applicant: Weatherford/Lamb Inc, USA A pressure-control apparatus and methodology related to a drilling operation form the subject of this patent. The apparatus has a housing, for example, a bearing assembly that is configured to engage an item of oilfield equipment. The housing has an upper and/or a lower portion, with a seal element coupled to these portions, and configured to seal around the item of oilfield equipment. A guide is coupled proximate to the seal element. This guide is configured to support and/or limit lateral deflection of the seal element during movement of oilfield equipment. Patent number: WO/2014/004516 Inventors: T.F. Bailey and J.W. Chambers Publication date: 3 January 2014
Sleeve for turbine bearing stack Applicant: United Technologies Corp, USA This invention relates generally to turbo-machinery, but specifically to bearing-protection structures. In particular, it concerns a thermal protection sleeve for gas-turbine radial support bearings. The patent focuses on a support bearing arrangement – a gas-turbine rotor shaft, bearing stack, bearing sleeve and support bearing. The bearing
July 2014
Applicant: General Electric Co, USA This patent provides details of a ceramic matrix composite (CMC) component and a method of attaching a static seal to it. Disadvantages associated with attaching a CMC to metallic hardware are the wear of the metallic hardware by the hard, abrasive ceramic material surface, and the lack of load distribution in the CMC. According to this patent, the CMC component includes first and second ends. A CMC metal interface member is attached to the second end. This interface member is capable of being joined to a static seal in a gas turbine. The inventors say this approach aims to provide a method for attaching a metal seal to a CMC component that does not suffer from the drawbacks mentioned. Patent number: WO/2014/004017 Inventors: J.H. Grooms, D.G. Senile, R.A. Frederick and C.T. McMillan Publication date: 3 January 2014
Valve apparatus with multi-layer seal structure Applicant: SDD Co Ltd, Korea This invention relates to a valve apparatus with a multi-layer seal structure comprising a body, plug, cage and cage adapter. When the plug descends to enable the valve to be closed, a high-pressure fluid is sealed in multiple layers in a gap between the plug and the cage adapter, thereby effectively blocking the leakage of the fluid. The plug and cage do not come into contact with each other, which means that damage to the expensive cage can be prevented. Patent number: WO/2014/003461 Inventors: Y.B. Kim, K.J. Kwon, G.C. Son and J.H. Kim Publication date: 3 January 2014
Resin composition and seal member Applicant: Kabushiki Kaisha Riken, Japan Details are provided of a resin composition and a seal member that is based on it. According
Applicant: Flowserve Management Co, USA A device has been developed to limit prerotation of fluid across regions of turbomachinery where significant pressure differentials exist between rotating and non-rotating components. In one form, this invention is particularly applicable to centrifugal-based turbo-machinery. Of particular concern is that highly-energised fluid exiting an impeller, or related rotating member, can impart significant swirl velocity and related rotor-dynamic forces which, in turn, may affect rotor stability. The potential for such instability is particularly high when flow coming from an impeller discharge permeates a seal, bushing or related component that is used to separate the impeller from an upstage partition. This invention replaces traditional bushing seal designs at swirl-prone regions with a vaned anti-swirl bushing that fits within the housing without increasing its axial or radial dimensions. Patent number: WO/2014/004628 Inventor: D. Adams Publication date: 3 January 2014
Pipe-repair clamp assembly Applicant: Victaulic Co, USA A clamp assembly for repairing a leak caused by a hole in a pipe element is detailed by this patent. The assembly has first and second arcuate segments that can be attached to one another, end to end. First and second connection members that are adjustable and can be tightened are positioned at each end of the first and second segments to form first and second segment joints. First and second seals are positioned between the segments and the pipe element on opposite sides of the hole, and first and second sealing plates are located at the segment joints and positioned between the segments and the pipe element to form a seal at each segment joint. Patent number: WO/2014/004834 Inventors: W.M. Biery and A. Klath Publication date: 3 January 2014
Sealing Technology
13