A blower housing, especially for a side channel blower, includes a first housing part (22) with a motor mounting space (25) for a blower motor (14). A rotor shaft (16), rotatable about a shaft axis of rotation (A), of a blower motor (14) is or can preferably be rotatably mounted at the first housing part (22). A housing cover (44) seals the motor mounting space (25). The housing cover (44) has a cover meshing opening (46). A second housing part (50), with a cover meshing projection (52), is positioned or can be positioned in a meshing manner in the cover meshing opening (46). The cover meshing opening (46) is sealed with the cover meshing projection (52) being positioned in a meshing manner in the cover meshing opening (46).

A heater side channel blower includes a blower housing (12) with a bottom wall (14) and a circumferential wall (16), that enclose a first flow chamber in a housing interior (18). A ring-shaped delivery duct (22), open towards an outer side of the blower housing (12), is provided at the bottom wall (14). A flow medium inlet (50), for the entry of medium to be delivered into the housing interior (18), is open towards the first flow chamber. A second flow chamber (42) is provided in the housing interior (18). A flow medium outlet (52), for the discharge of medium to be delivered from the housing interior (18), is open towards the delivery duct (22) to the second flow chamber (42). The first flow chamber is separated from the second flow chamber (42) by at least one chamber separation element (60, 62) that is permeable to medium to be delivered.

A vortex pump may include a motor portion and a pump portion. The pump portion includes an impeller that rotates integrally with an output shaft of a motor. The motor portion and the pump portion are separated by a separation wall. A vane-groove region including vane grooves is provided on a surface of the impeller facing the separation wall. The separation wall includes a facing groove facing the vane-groove region and extending along a rotation direction of the impeller. A communication hole that communicates the motor portion and the pump portion is provided on the facing groove. The communication hole extends in a direction along swirling flow formed by the vane grooves and the facing groove when the vortex pump is operating.

The invention relates to a side-channel compressor (1) for a fuel cell system (37) for conveying and/or compressing a gaseous medium, in particular hydrogen, comprising a housing (3); a compressor chamber (30) which is situated in the housing (3) and which has at least one encircling side channel (19, 21); a compressor impeller (2) which is situated in the housing (3) and which is arranged so as to be rotatable about a rotational axis (4), wherein the compressor impeller (2) has conveying cells (5) arranged on the impeller circumference in the region of the compressor chamber (30); and in each case one gas inlet opening (14) formed on the housing (3) and one gas outlet opening (16), which are fluidically connected together via the compressor chamber (30), in particular the at least one side channel (19, 21). The housing (3) has a respective first and second end face (32, 34) radially to the rotational axis (4), each end face facing the compressor impeller (2), and a first and second functionally relevant gap dimension (36, 38) is formed in the region of each gap surface. According to the invention, the compressor impeller (2) is designed in multiple parts and has a first impeller shell (10) and a second impeller shell (12). The impeller shells (10, 12) are arranged adjacently to each other axially to the rotational axis (4) in particular, and each impeller shell is at least partly made of a plastic.

A side channel compressor for compressing a gas includes a housing and at least one impeller which is arranged in the housing and configured to be driven in rotation about a central axis. In addition, the side channel compressor includes at least one seal assembly arranged in the housing and including at least one sealing device configured to seal at least one gap between the housing and the at least one impeller and be forced radially outward with respect to the central axis in order to keep the at least one gap small. The at least one seal assembly also includes at least one sealing-device-holding device configured to hold the at least one sealing device in an axially secured fashion with respect to the central axis and which includes at least one main holding body.

The side-channel blower/aspirator (1), comprises an impeller (2) equipped with a plurality of blades (21) and a casing (13, 14), in which the impeller (2) is enclosed and within which an annular conduit (C) is defined in which the blades (21) rotate.

The blades (21) comprise at least one longitudinally curved portion, defining a concavity (23) facing the advancement direction of the blades (21) within the conduit.

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).

An O-ring and a side channel blower employing an O-ring for providing a gap-free, air-tight seal of the blower channel and side-by-side pressure and vacuum ports. The O-ring includes a generally circular, main O-ring have two free ends for sealing a majority of the blower impeller channel, and two relatively smaller O-rings, each of which is attached to an opposite one of the free ends of the main O-ring and are spaced apart in a side-by-side manner and are connected to one another by a bridge member. The small O-rings are configured and dimensioned so that one of the small O-rings serves to seal the vacuum port of the blower and that the other of the small O-rings serves to seal the pressure port of the blower, with the two small O-rings and bridge member and free ends of the main O-ring arranged to create a generally spectacle-like shape.

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).

In accordance with one aspect the present invention may comprise a regenerative blower comprising: a housing, a first port and second port in the housing, an airflow channel extending between the first and second ports for airflow between the ports, an impeller rotatable in an impeller channel to promote airflow in the airflow channel from the first port to the second port, a motor to drive the impeller, and an interrupter between the first and second ports to limit airflow from the second port to the first port.