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Thermally sprayed coating
PATENTS Thermally sprayed coating
Patents Control valve trim and seal Applicant: Fisher Controls International Llc, USA A seal that is used for creating a seal between the plug and cage of a control valve is described. The valve cage is located in the valve body and includes an internal surface, sized to receive the valve plug such that a gap between the valve cage and the valve plug defines a leak path. A sealing ring within the gap provides a secondary seal – sealing the leak path when the valve plug is in the closed position. This sealing ring (21) includes an L-shaped crosssection that provides an effective seal regardless of the port diameter of the fluid-control device, and thus, reduces the number of types of seals required to be stored in inventory for various applications. Detail on the profile and potential variations in the design are covered. The sealing ring (21) can be constructed of metal such as Inconel X750 (industry designation N07750), 718 metal (industry designation N07718), or any other suitable material capable of withstanding relatively high temperatures of approximately 232ºC. *ÕLV>ÌÊÕLiÀ\ WO/2009/088633 ÛiÌÀ\ L.E. Fleming *ÕLV>ÌÊ`>Ìi\ 16 July 2009
Applicant: Mahle International GmbH, Germany A method of applying a thermally sprayed coating to the lower radial surface of a piston ring is described, without coating the outside diameter or the upper radial face. *ÕLV>ÌÊÕLiÀ\ WO/2009/088741 ÛiÌÀÃ\ T. Smith, T. Stong, P.J. Einberger and D. Domanchuk *ÕLV>ÌÊ`>Ìi\ 16 July 2009
Segmented labyrinth seal Applicant: The Timken Co, USA The subject of this patent is a labyrinth seal for protecting bearings. It would be advantageous to provide a large-size rotary shaft seal, such as a labyrinth seal or dynamic-type shaft seal, with complicated labyrinth pathways, for improved efficiency in applications involving extreme environments. This patent describes an interlocking labyrinth design that also has variations in diameter, to provide what is described as an angled pathway to inhibit the passage of contaminants. A wide range of potential geometries are illustrated and a variety of leak off or expeller ports are also noted. *ÕLV>ÌÊÕLiÀ\ WO/2009/089318 ÛiÌÀ\ R. Borowski *ÕLV>ÌÊ`>Ìi\ 16 July 2009
A bearing seal, detailed by patent WO/2009/090120, is designed to provide improved sealing and low friction. A lubricant may be contained in the volume between the two seal lips (46).
Bearing seal
Patent WO/2009/088633 details a valve trim seal for use at high temperatures. It is designed to work with a range of plug-to-cage clearances.
12
Sealing Technology
Applicant: Aktiebolaget SKF, Sweden The object of this invention is to provide a seal to ensure effective sealing while as much as possible limiting the dissipation of energy. A further requirement is that it should be easy to manufacture. The dynamic seal portion comprises at least first and second lips, forming an annular chamber that is capable of being filled with lubricant. The seal is configured to allow, during the contact of a fluid with at least the dynamic seal portion, a movement of one of the lips. The dynamic seal portion comprises a material that can expand during contact with the fluid. Therefore, the dynamic seal portion (during contact with the fluid) allows a variation of volume and a local deformation of at least one of the lips in order to obtain the movement relative to the other lip. This provides a movement of one of the lips relative to the other lip under the action of the fluid, even if this contact is occasional and/or the pressure of contact is relatively weak. This is to make the seal more resistant to the effect of jets of water. The surfaces of the lips may be modified with an oleophobic coating.
November 2009
Patents Control valve trim and seal Applicant: Fisher Controls International Llc, USA A seal that is used for creating a seal between the plug and cage of a control valve is described. The valve cage is located in the valve body and includes an internal surface, sized to receive the valve plug such that a gap between the valve cage and the valve plug defines a leak path. A sealing ring within the gap provides a secondary seal – sealing the leak path when the valve plug is in the closed position. This sealing ring (21) includes an L-shaped crosssection that provides an effective seal regardless of the port diameter of the fluid-control device, and thus, reduces the number of types of seals required to be stored in inventory for various applications. Detail on the profile and potential variations in the design are covered. The sealing ring (21) can be constructed of metal such as Inconel X750 (industry designation N07750), 718 metal (industry designation N07718), or any other suitable material capable of withstanding relatively high temperatures of approximately 232ºC. *ÕLV>ÌÊÕLiÀ\ WO/2009/088633 ÛiÌÀ\ L.E. Fleming *ÕLV>ÌÊ`>Ìi\ 16 July 2009
Applicant: Mahle International GmbH, Germany A method of applying a thermally sprayed coating to the lower radial surface of a piston ring is described, without coating the outside diameter or the upper radial face. *ÕLV>ÌÊÕLiÀ\ WO/2009/088741 ÛiÌÀÃ\ T. Smith, T. Stong, P.J. Einberger and D. Domanchuk *ÕLV>ÌÊ`>Ìi\ 16 July 2009
Segmented labyrinth seal Applicant: The Timken Co, USA The subject of this patent is a labyrinth seal for protecting bearings. It would be advantageous to provide a large-size rotary shaft seal, such as a labyrinth seal or dynamic-type shaft seal, with complicated labyrinth pathways, for improved efficiency in applications involving extreme environments. This patent describes an interlocking labyrinth design that also has variations in diameter, to provide what is described as an angled pathway to inhibit the passage of contaminants. A wide range of potential geometries are illustrated and a variety of leak off or expeller ports are also noted. *ÕLV>ÌÊÕLiÀ\ WO/2009/089318 ÛiÌÀ\ R. Borowski *ÕLV>ÌÊ`>Ìi\ 16 July 2009
A bearing seal, detailed by patent WO/2009/090120, is designed to provide improved sealing and low friction. A lubricant may be contained in the volume between the two seal lips (46).
Bearing seal
Patent WO/2009/088633 details a valve trim seal for use at high temperatures. It is designed to work with a range of plug-to-cage clearances.
12
Sealing Technology
Applicant: Aktiebolaget SKF, Sweden The object of this invention is to provide a seal to ensure effective sealing while as much as possible limiting the dissipation of energy. A further requirement is that it should be easy to manufacture. The dynamic seal portion comprises at least first and second lips, forming an annular chamber that is capable of being filled with lubricant. The seal is configured to allow, during the contact of a fluid with at least the dynamic seal portion, a movement of one of the lips. The dynamic seal portion comprises a material that can expand during contact with the fluid. Therefore, the dynamic seal portion (during contact with the fluid) allows a variation of volume and a local deformation of at least one of the lips in order to obtain the movement relative to the other lip. This provides a movement of one of the lips relative to the other lip under the action of the fluid, even if this contact is occasional and/or the pressure of contact is relatively weak. This is to make the seal more resistant to the effect of jets of water. The surfaces of the lips may be modified with an oleophobic coating.
November 2009