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公开(公告)号：US11230974B2
公开(公告)日：2022-01-25
申请号：US15992932
申请日：2018-05-30
摘要： The present application provides a variable frequency Helmholtz damper system for use with a combustor of a gas turbine engine. The variable frequency Helmholtz damper system may include one or more Helmholtz dampers and a purge medium temperature control unit for providing a flow of purge medium to the Helmholtz dampers. The purge medium temperature control unit may be in communication with a temperature control fluid flow such that the purge medium temperature control unit may vary the temperature of the flow of purge medium.
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公开(公告)号：US20210399725A1
公开(公告)日：2021-12-23
申请号：US16967856
申请日：2019-02-06
发明人： John Lewis Outram
IPC分类号： H03K17/0812 , H03K17/16
摘要： A switching apparatus (20) comprises first and second current paths, each current path configured to be capable of conducting an electrical current, the first current path including a first switching element (28) connected in parallel with a first passive current check element (30), the switching apparatus (20) further including a switching controller configured to selectively control the switching of the first switching element (28), wherein the switching controller is configured to selectively switch the first switching element (28) at a first intra-current path switching speed to commutate the electrical current between the first switching element (30) and the first passive current check element (32), the switching controller is configured to selectively switch the first switching element (28) at a first inter-current path switching speed to commutate the electrical current between the first and second current paths, and the first intra-current path switching speed is faster or slower than the first inter-current path switching speed.
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公开(公告)号：US20210398762A1
公开(公告)日：2021-12-23
申请号：US17274074
申请日：2018-09-07
发明人： Yannick KIEFFEL , François BIQUEZ
IPC分类号： H01H33/70
摘要： The invention relates to an electric arc-blast nozzle (5) for a circuit breaker comprising a middle portion (7) forming a throat defining internally an axial passage (13) for interrupting an electric arc, and two end portions (9, 11) extending on either side of the middle portion (7) and being designed to receive respective arcing contacts (1) and (3) that are movable axially relative to each other.
The middle portion (7) and the two end portions (9, 11) are made of a same dielectric material obtained from a composition comprising a fluorocarbon polymer matrix, at least one inorganic filler and micro-capsules of liquid heptafluoro-iso-butyronitrile.
The invention also relates to a circuit breaker including such a nozzle (5).-
公开(公告)号：US20210396156A1
公开(公告)日：2021-12-23
申请号：US17304352
申请日：2021-06-18
摘要： Disclosed is an exhaust duct (1) for a gas turbine engine (50), comprising a silencer section (12). At least two plate-shaped silencer baffles (20) are provided inside the silencer section (12). At least one of the plate-shaped silencer baffles is configured as a heat exchange device in that it comprises at least one internal cavity (22) suitable for receiving a heat exchange fluid and leakproof with respect to the interior of the exhaust duct, wherein the at least one internal cavity is fluidly connected to the outside of the exhaust duct at an inlet port and an outlet port (23, 24). This device is useful for recuperating exhaust heat from exhaust gases of the gas turbine engine without the expense and additional space required for providing a heat recovery steam generator.
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公开(公告)号：US11189446B2
公开(公告)日：2021-11-30
申请号：US16857010
申请日：2020-04-23
发明人： Riyad Kechroud , Clément Rollier
IPC分类号： H01H33/664 , H01H33/666
摘要： The invention relates to a universal vacuum interrupter (UVI) (30) for an air disconnect switch (100) comprising a rotatable actuating arm (21) arranged for engagement by a corresponding contact (16), such as a roller, attached to the main blade (12) of an air disconnect switch (100). In particular, the actuating arm (21) comprises two rods (22) extending next to each other and adapted for receiving the corresponding contact (16) of the main blade (12) between them. The two rods (22) are movable to alter the distance between them but are biased together by biasing means (24), e.g. helical springs. As the corresponding contact (16) of a main blade (12) will be in engagement with both rods (22) during disconnection and reconnection of the air disconnect switch (100), arcing is thereby prevented. Preferably, the two rods (22) of the UVI (30) are made of aluminium.
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公开(公告)号：US11146043B2
公开(公告)日：2021-10-12
申请号：US16469917
申请日：2017-12-11
摘要： A switching apparatus comprises: a plurality of parallel-connected current-conductive branches, each current-conductive branch including at least one respective gas tube switch; and a switching control unit configured to control the turn-on of the gas tube switches in a switching order so that the flow of current in the switching apparatus is controlled to switch between the current-conductive branches, wherein the switching order of the turn-on of the gas tube switches is arranged so that only one of the current-conductive branches is carrying the current during each turn-on cycle of the switching apparatus.
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公开(公告)号：US11127550B2
公开(公告)日：2021-09-21
申请号：US16893031
申请日：2020-06-04
发明人： Keith McLaughlin , Ludovic Darles , Jérôme Laurent , Thomas Tometich , Andrew Chovanec , Chase Peltier
摘要： A contact arrangement for a Pre-Insertion Resistor (PIR) wherein a control rod is arranged to move a movable contact, against the force of a biasing member, into temporary connection with a PIR. The control rod comprises a tulip with a plurality of resilient fingers and having a first diameter where it is able to mechanically couple to a latching ring on the movable contact, and a second diameter where the tulip is deformed with the fingers deflected inwards, once the resistance to movement exceeds a predetermined value, wherein the latching ring is able to pass over the tulip to decouple the movable contact from the control rod. The contact arrangement is particularly suited for a PIR arranged for connection in parallel to the interrupter of a gas-insulated switchgear (GIS) circuit breaker.
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公开(公告)号：US11117136B2
公开(公告)日：2021-09-14
申请号：US16668334
申请日：2019-10-30
发明人： Paul M. Colson , Douglas W. Crafts
摘要： A method of upgrading a vertical spindle pulverizer includes the steps of removing a cover from a journal opening in a housing of the pulverizer to access a grinding zone of the pulverizer, removing a first journal assembly having a toroidal grinding roll from the pulverizer through the journal opening, removing a plurality of toroidal table segments from a grinding table of the pulverizer, installing a plurality of inclined bull ring segments on the grinding table, installing a second journal assembly having a conical grinding roll in the pulverizer, and replacing the cover over the journal opening. The inclined bull ring segments are configured to register with a grinding surface of the conical grinding roll.
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公开(公告)号：US11092980B2
公开(公告)日：2021-08-17
申请号：US15353097
申请日：2016-11-16
摘要： A valve with relatively reduced tank penetration is useful for cleaning at least a portion of a filter unit, such as multiple filter bags, arranged in a filter installation for filtering polluted gas passed therethrough. This valve is preferably a relatively high performance pulse valve of relatively small pressure vessel penetration cross section area useful with relatively lower cost pressure vessels.
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公开(公告)号：US11081879B2
公开(公告)日：2021-08-03
申请号：US15766555
申请日：2016-09-29
摘要： A DC distance protection controller for identifying a fault within a protection zone that extends between a first terminal and a set point along a DC power transmission conduit which lies between the first terminal and a second terminal within a DC electrical power network. The protection controller periodically obtains as respective sampled pairs a measured voltage value and a measured current value of the DC power transmission conduit; isolates a fault component voltage value and a fault component current value to define a respective corresponding isolated pair; calculates from each isolated pair a fault component operating voltage of the DC power transmission conduit at the set point; compare a given calculated fault component operating voltage with a historical voltage value; and identifies a fault within the protection zone when the given calculated fault component operating voltage is greater than the historical voltage value.
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