摘要:
A method of repairing a seal wire groove is disclosed, the groove forming an annular structure having an outer surface and an inner surface and defining an original profile when new, comprising the steps of: removing a less-than-annular portion of the original profile of the groove to remove damaged portions of at least one of the inner and outer surfaces thereby forming a void; adding new material to the void; and shaping the new material to form a new profile of the groove.
摘要:
A gas turbine unit comprising: - a combustor having a liner (4); - a turbine, arranged downstream of the liner (4) along a main flow gas direction (M) and including a plurality of first stage vanes (28); - a rotor cover support (6), located inwardly of the vanes (28) ; - a sealing arrangement at the combustor to turbine interface (1) ; wherein the sealing arrangement comprises a first dogbone seal (3) extending between the rotor cover support (6) and an inner downstream end of the liner (4) or between the rotor cover support (6) and a bulkhead (5) located at the inner downstream end of the liner (4).
摘要:
A gasket having a novel structure ensuring both the gas tightness and the low-friction slidability is provided. A sliding portion of the gasket (13) includes at least a first annular projection (17A), an annular recess and a second annular projection (17B) arranged in this order in a direction rearward from a distal portion of the gasket serving as a liquid contact portion. The first projection (17A) is designed so that a first peak appears adjacent the distal portion of the gasket when the gasket is fitted in the syringe barrel (11) and a product α of a contact pressure P1f and a width D1f of the first peak is 0.4 ≤ α ≤ 1.0 as determined by an FEM analysis.
摘要:
Provided is a vacuum devolatilizer for use in a polymer manufacturing or processing plant. The devolatilizer comprises a vacuum chamber having an inlet for a polymer melt, an outlet for a polymer melt, a vacuum port through which volatiles may be removed and a stirrer shaft port for the entry of a stirrer shaft. The stirrer shaft passes through the at least one stirrer shaft port and extends into the vacuum chamber and carries an agitation means. The stirrer shaft seal is associated with each stirrer shaft port for sealing against the stirrer shaft and each stirrer shaft seal has an external portion outside the vacuum chamber. The devolatilizer is provided with a motor located outside of the vacuum chamber for rotating shaft and comprises means for blanketing the external portion of the stirrer shaft seal with a low oxygen content gas or vapor, e.g., nitrogen, helium, steam, or carbon dioxide.
摘要:
To suppress occurrence of a separation of a seal in a valve stem seal including an oil lip and a back pressure lip and fitted to the outer-diameter portion of a valve stem guide. A pressure receiving lip engaging with a guide groove of a valve stem guide is provided in an inner-diameter surface of an inner-diameter rubber portion, and a channel is provided in a portion between a back pressure lip and the pressure receiving lip of the inner-diameter rubber portion so as to guide pressure which has entered from a gap between a valve stem guide and a valve stem to a space between the valve stem guide and the back pressure lip, toward the pressure receiving lip, thereby canceling part of the pressure.
摘要:
A valve trim assembly for use with fluid valves is disclosed comprising a cage, and a seal assembly to be positioned in a plug. Further the seal assembly comprises a first seal and a first scraper, wherein the first seal is to provide a load to the first scraper to prevent the ingress of contaminate to a dynamic sealing surface to be engaged by the first seal, a second seal and a second scraper, wherein the second seal is to provide a load to the second scraper, and a spacer between the first and second seals.
摘要:
To suppress occurrence of a separation of a seal in a valve stem seal including an oil lip and a back pressure lip and fitted to the outer-diameter portion of a valve stem guide. A pressure receiving lip engaging with a guide groove of a valve stem guide is provided in an inner-diameter surface of an inner-diameter rubber portion, and a channel is provided in a portion between a back pressure lip and the pressure receiving lip of the inner-diameter rubber portion so as to guide pressure which has entered from a gap between a valve stem guide and a valve stem to a space between the valve stem guide and the back pressure lip, toward the pressure receiving lip, thereby canceling part of the pressure.
摘要:
Abschlußanordnung, insbesondere einer pneumatischen Feder, bestehend aus einem Behälterrohr (11), in dem sich ein unter Druck stehendes Medium befindet, und einer in das Behälterrohr (11) ein- und ausfahrenden Kolbenstange (12), die in einer Kolbenstangenführung (14) geführt und mit einer Kolbenstangendichtung nach außen hin abgedichtet ist. Die Kolbenstangenführung (14) ist mit einer Umbördelung (15) des Behälterrohres (11) in ihrer Lage gehalten. Die Kolbenstangenführung (14) ist an ihrem austrittsseitigen Ende mit einer radialen Hinterschneidung (16) versehen, in der eine die Umbördelung (15) überdeckende Schutzkappe (20) festlegbar ist. Die Schutzkappe (20) ist mit einem axial verlaufenden, zylindrischen Sitzring (25) und einer radial nach außen verlaufenden Abdeckkappe (27) versehen. Der Sitzring (25) geht axial innen einstückig in einen abgewinkelten Schnappring (26) über und der Schnappring (26) ist radial außen mit einem rundumlaufenden Befestigungsbund (21) versehen, der mit der Hinterschneidung (16) in der Kolbenstangenführung (14) in Wirkverbindung bringbar ist.
摘要:
Dispositif de communication entre deux milieux (2,3) séparés par une paroi (1) fendue. On dispose sur la fente (4) un joint à lèvres (13, 14) dont la bordure (15, 16) est recouverte d'aimants (17, 18) qui s'attirent. Le bras (5) traversant la fente (4) est pourvu d'aimants (21, 22) qui repoussent localement les lèvres (13, 14). On évite ainsi les frottements et les déformations. Application aux enceintes propres pour fabrication de semi-conducteurs.