Shroud assembly of an axial turbomachine (2) having a rotor (12), such as a turbomachine compressor air-intake shroud (28). The assembly comprises an annular layer (32) of abradable material that is able to cooperate by abrasion with lips (44) of the turbomachine in order to ensure tightness, and a heating module (38) for the abradable layer (32). The module (38) comprises electrical heating resistors (42) within the abradable material in order to prevent the presence of ice on the shroud (28). The abradable material is thus used as a heating body which receives, transports and distributes the heat used for de-icing.

Systems and method for operating a gas compressor are disclosed herein. A compressor can have one or more dry gas seals surrounding the central axle of the compressor. The dry gas seals can each be pressurized with a barrier gas or other fluid supply providing a barrier within the dry gas seal. The method can include controlling delivery of a first barrier gas to the one or more dry seals during a startup or initiation of the compressor. The method can include controlling delivery of a second barrier gas different from the first barrier gas to the one or more dry seals based on the information received from sensors disposed within the compressor that can measure, inter alia, dry seal temperature and pressure within the system. The method can further include terminating the delivery of the first barrier gas based on the sensor information.

This invention discloses a portable self-priming pump, which includes a pump body, a pump cover, a rubber impeller with a metal insert, and a metal shaft. An inner cavity formed by the pump body, in the side wall of the pump body provided with a water inlet and a water outlet which are communicated with the inner cavity, the water inlet and the water outlet are in the same plane and the angle formed by their axes is 20-160, the inner cavity is designed with a cam-shaped structure and the rubber impeller with a metal insert is placed in the inner cavity. The whole structure of the portable self-priming pump is simplified, so it's convenient for installation, manufacture and disassembly and maintenance, and it is with a small sized volume which occupies small space and is suitable for operation in narrow space, and it has high practicality accordingly.

A turbocharger compressor includes an inlet-adjustment mechanism operable to move between an open position and a closed position. The mechanism includes a plurality of movable blades disposed about the compressor air inlet and located between an upstream wall surface and a downstream wall surface of an annular space within the air inlet wall. The blades move radially inward from the annular space into the air inlet when the blades are in the closed position so as to form an orifice of reduced diameter relative to a nominal diameter of the inlet. Recirculation of air upstream through the mechanism is prevented by a downstream blade seal. When EGR is employed, an upstream blade seal is included, preventing oil-laden air from migrating into the mechanism. The blade seals can be of various types, including O-ring seals or labyrinth seals.

A compressor is provided for use in domestic appliances. The compressor includes: an impeller including an inlet, an outlet, a hub defining a rotational axis of the impeller, a plurality of impeller blades that extend from the hub, and a shroud that at least partially surrounds the impeller blades; a housing that at least partially surrounds the shroud and that is coaxially arranged with respect to the rotational axis of the impeller to allow the impeller to rotate within the housing; a leakage flow path defined between the shroud and the housing leading from a leakage flow path inlet to a reinjection port, and a labyrinth seal arrangement provided in the leakage flow path. The labyrinth seal arrangement includes one or more shroud rings interdigitated with one or more housing rings so as to form a tortuous flow path for fluid flowing through the leakage flow path.

This centrifugal rotary machine includes an impeller having a disk, blades, and a cover. The centrifugal rotary machine further includes a casing which accommodates the impeller radially inward and forms a gap between an outer circumferential surface of the cover and the casing. The centrifugal rotary machine further includes a sealing device which seals the gap. The casing includes an end wall surface which is disposed to face one axial side of a cover end surface facing one axial side of the cover, extends in the radial direction and forms a radial flow path between the end wall surface and the cover end surface. The casing further includes a foreign matter introduction path which is formed inside the casing and communicates with a radially outer side of the radial flow path.

The invention relates to a side-channel machine having a housing (4a), located in the housing (4a) a side-channel (28) for guiding a gas, and at least one gas inlet opening (34) which is formed in the housing (4a) and is fluidically connected to the side-channel (28). Furthermore, the side-channel machine has at least one gas inlet pipe (29a) which connects to the at least one gas inlet opening (34), The side-channel machine further comprises at least one gas outlet opening (33) and at least one gas outlet pipe (31a) which connects to the at least one gas outlet opening (33). Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing (4a), with impeller blades, which bound impeller cells arranged in the side-channel (28), for delivering the gas in the impeller cells from the at least one gas inlet opening (34) to the at least one gas outlet opening (33). The side-channel machine further has at least one interrupter (39) arranged between the at least one gas inlet opening (34) and the at least one gas outlet opening (33).

The invention relates to a side-channel machine having a housing, located in the housing side-channel for guiding a gas, and at least one gas inlet opening which is formed in the housing and is fluidically connected to the side-channel. Furthermore, the side-channel machine has at least one gas inlet pipe which connects to the at least one gas inlet opening. The side-channel machine further comprises at least one gas outlet opening and at least one gas outlet pipe which connects to the at least one gas outlet opening. Furthermore, the side-channel machine has an impeller that can be made to rotate in the housing, with impeller blades, which bound impeller cells arranged in the side-channel, for delivering the gas in the impeller cells from the at least one gas inlet opening to the at least one gas outlet opening. The side-channel machine further has at least one interrupter arranged between the at least one gas inlet opening and the at least one gas outlet opening.

A method for sealing an oxygen-rich process gas within a compressor or expander, including providing a rotor component having a rotating element and providing a stator component having a stationary element. Introducing a seal gas into the first sealing zone and introducing a buffer gas into the second sealing zone. Wherein at least a portion of the rotating element includes the teeth of a first labyrinth seal. Wherein the first labyrinth seal is part of a first sealing zone. Wherein at least a portion of the stationary element includes the teeth of a second labyrinth seal. And wherein the second labyrinth seal is part of a second sealing zone.

A gas seal to seal an oxygen-rich process gas within a compressor or expander, including a rotor component having a rotating element and a stator component having a stationary element. Wherein at least a portion of the rotating element includes the teeth of a first labyrinth seal. Wherein the first labyrinth seal is part of a first sealing zone. Wherein at least a portion of the stationary element includes the teeth of a second labyrinth seal. Wherein the second labyrinth seal is part of a second sealing zone.