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Gasket-locating arrangement
PATENTS
The ‘‘X-shaped’’ ring seal for wind turbine bearings, covered by patent WO/2011/050837 – also showing the design that facilitates extraction of a worn seal, which is discussed in patent WO/2011/050838.
basic ‘‘X’’ configuration are also illustrated. Publication numbers: WO/2011/050837 and WO/2011/050838 Inventors: J.-H. Tanke, P. Ovize, A. Gruber and W. Swete Publication date: 5 May 2011
Piston ring Applicant: Federal-Mogul Burscheid GmbH, Germany This invention relates to a sliding element, in particular a piston ring, preferably made from cast iron or steel. It includes a coating, which has a CrN, an Me(CxNy) and a diamond-like carbon (DLC) layer, extending from the inside to the outside. This DLC layer is either metal-free or consists of a metal-containing substructure and a metal-free DLC top layer. This invention further relates to a combination of such a sliding element with an iron-based mating running element. Publication number: WO/2011/051008 Inventors: M. Kennedy and M. Zinnabold Publication date: 5 May 2011
Gasket-locating arrangement Applicant: Alfa Laval Corporate Ab, Sweden Retaining gaskets for use in a plate heatexchanger or reactor vessel are discussed. Planar
October 2011
gaskets can be used in applications where two flat surfaces are clamped together to seal off an interior chamber or flow path to an exterior space. In some applications, it is important to locate the gasket coincident with the shape of the flat sealing surfaces. In other applications it is equally important to both locate and attach the gasket to a sealing surface to facilitate handling during assembly. This can be a problem when assembly procedures involve gaskets with complex shapes, where the gasket is hidden during assembly or where there are no means of locating the gasket using its edges. One restriction is that in order to use interference fitted dowel pins, a plate of sufficient thickness is required. Another restriction is that the design does not easily allow the dowel pins to be removed. In addition, there will be crevices in the interference fit for the dowel pins which are difficult to clean and in which corrosion is difficult to spot. This invention provides a solution to these problems by creating a new gasket-locating arrangement. Accordingly, it relates to an arrangement for a flow module, preferably a plate reactor. The gasket-locating arrangement comprises a gasket and a means of locating it; a channel in a channel plate; and a barrier plate, in which the gasket constitutes a sheet of soft material. The sheet has a cutthrough pattern that corresponds to the channel in the channel plate. The ‘‘locating means’’
can be part of the gasket, channel plate, barrier plate, or a combination of these. It is selected from a group of possibilities that include headed, fitting, protruded, integrated and dowel pins; grooves, holes, under-cut recesses; thickened parts in the gasket material; holes in the gasket material; and gasket deformation zones. The locating means – in the gasket, in the channel plate, or in the barrier plate – can be fitted into the corresponding locating means in the gasket, channel plate, barrier plate or a combination of these, leaving a flat surface together with the gasket between the channel plate and the barrier plate. The gasket consists of a sheet of soft material having a cut-through pattern corresponding to a channel in a channel plate. The gasket can use holes or other locating means, such as thickened parts, and parts attached to the gasket or deformation zones, for fitting it into the corresponding fitting means in the flow module or the flow reactor. The gasket may be limited by the flat, sealing surface of the channel plate. The thickened parts could be materials added to the gasket on the locating spots, and could be made of the same material as the gasket itself and be produced at the same time as the gasket. The parts attached to the gasket also could be made from a different material, for instance, expanded polytetrafluoroethylene (ePTFE), to which are attached PTFE parts. The gasket could be made of a material which is characterised by layers of a stochastic fibrous structure with a large amount of void space. At assembly, such a gasket will first undergo a large non-recoverable deformation and if the load is increased a second elastic, recoverable deformation will take place. Such a material is very soft and the shape of the gasket is highly dependent on how it is handled and located on the sealing surface. The gasket may be a flat sheet, or multi-layered sheet of a suitable material, for example, multi-layered ePTFE. It also may be some other polymeric or elastomeric material, such as polyetheretherketone (PEEK), polypropene (PP), polytetrafluoroethylene (PTFE) or Viton, Teflon and Kalrez. Preferably, ePTFE is used as the gasket material. Publication number: WO/2011/051291 Inventors: K. Höglund and M. Lingvall Publication date: 5 May 2011
Sealing Technology
15
The ‘‘X-shaped’’ ring seal for wind turbine bearings, covered by patent WO/2011/050837 – also showing the design that facilitates extraction of a worn seal, which is discussed in patent WO/2011/050838.
basic ‘‘X’’ configuration are also illustrated. Publication numbers: WO/2011/050837 and WO/2011/050838 Inventors: J.-H. Tanke, P. Ovize, A. Gruber and W. Swete Publication date: 5 May 2011
Piston ring Applicant: Federal-Mogul Burscheid GmbH, Germany This invention relates to a sliding element, in particular a piston ring, preferably made from cast iron or steel. It includes a coating, which has a CrN, an Me(CxNy) and a diamond-like carbon (DLC) layer, extending from the inside to the outside. This DLC layer is either metal-free or consists of a metal-containing substructure and a metal-free DLC top layer. This invention further relates to a combination of such a sliding element with an iron-based mating running element. Publication number: WO/2011/051008 Inventors: M. Kennedy and M. Zinnabold Publication date: 5 May 2011
Gasket-locating arrangement Applicant: Alfa Laval Corporate Ab, Sweden Retaining gaskets for use in a plate heatexchanger or reactor vessel are discussed. Planar
October 2011
gaskets can be used in applications where two flat surfaces are clamped together to seal off an interior chamber or flow path to an exterior space. In some applications, it is important to locate the gasket coincident with the shape of the flat sealing surfaces. In other applications it is equally important to both locate and attach the gasket to a sealing surface to facilitate handling during assembly. This can be a problem when assembly procedures involve gaskets with complex shapes, where the gasket is hidden during assembly or where there are no means of locating the gasket using its edges. One restriction is that in order to use interference fitted dowel pins, a plate of sufficient thickness is required. Another restriction is that the design does not easily allow the dowel pins to be removed. In addition, there will be crevices in the interference fit for the dowel pins which are difficult to clean and in which corrosion is difficult to spot. This invention provides a solution to these problems by creating a new gasket-locating arrangement. Accordingly, it relates to an arrangement for a flow module, preferably a plate reactor. The gasket-locating arrangement comprises a gasket and a means of locating it; a channel in a channel plate; and a barrier plate, in which the gasket constitutes a sheet of soft material. The sheet has a cutthrough pattern that corresponds to the channel in the channel plate. The ‘‘locating means’’
can be part of the gasket, channel plate, barrier plate, or a combination of these. It is selected from a group of possibilities that include headed, fitting, protruded, integrated and dowel pins; grooves, holes, under-cut recesses; thickened parts in the gasket material; holes in the gasket material; and gasket deformation zones. The locating means – in the gasket, in the channel plate, or in the barrier plate – can be fitted into the corresponding locating means in the gasket, channel plate, barrier plate or a combination of these, leaving a flat surface together with the gasket between the channel plate and the barrier plate. The gasket consists of a sheet of soft material having a cut-through pattern corresponding to a channel in a channel plate. The gasket can use holes or other locating means, such as thickened parts, and parts attached to the gasket or deformation zones, for fitting it into the corresponding fitting means in the flow module or the flow reactor. The gasket may be limited by the flat, sealing surface of the channel plate. The thickened parts could be materials added to the gasket on the locating spots, and could be made of the same material as the gasket itself and be produced at the same time as the gasket. The parts attached to the gasket also could be made from a different material, for instance, expanded polytetrafluoroethylene (ePTFE), to which are attached PTFE parts. The gasket could be made of a material which is characterised by layers of a stochastic fibrous structure with a large amount of void space. At assembly, such a gasket will first undergo a large non-recoverable deformation and if the load is increased a second elastic, recoverable deformation will take place. Such a material is very soft and the shape of the gasket is highly dependent on how it is handled and located on the sealing surface. The gasket may be a flat sheet, or multi-layered sheet of a suitable material, for example, multi-layered ePTFE. It also may be some other polymeric or elastomeric material, such as polyetheretherketone (PEEK), polypropene (PP), polytetrafluoroethylene (PTFE) or Viton, Teflon and Kalrez. Preferably, ePTFE is used as the gasket material. Publication number: WO/2011/051291 Inventors: K. Höglund and M. Lingvall Publication date: 5 May 2011
Sealing Technology
15