A shaft sealing arrangement includes a first seal and a second seal, wherein the first seal is designed in the form of a lip seal and the second seal is designed in the form of a mechanical seal. When the shaft is at a standstill, the lip seal performs the sealing action and, when the shaft is rotating, the mechanical seal performs the sealing action.

A labyrinth sealing device for reducing gas intrusion is provided. A sealing bush is provided with a jet hole at the front of a tooth tip gap. The jet hole faces a tip of a corresponding sealing tooth. A gas flow injected by the jet hole suppresses hot gas flowing into the tooth tip gap. The sealing bush is provided with a first intercepting member at the rear of the tooth tip gap, and the sealing tooth is provided with a second intercepting member at the rear of the tooth tip gap. The first intercepting member hinders hot gas flowing against an inner wall of the sealing bush, and the second intercepting member hinders hot gas flowing against the sealing tooth, such that a part of the hot gas flows in a reverse direction and is violently mixed with subsequent hot gas.

A compression ring for a shrouded compressor including a radially inner surface having one or more areas configured to mate flush with one or more portions of a radially outward surface of a shroud of the shrouded compressor, a radially outer surface located opposite the radially inner surface, a labyrinth seal located on the radially outer surface, a groove located within the radially inner surface, and a load ring located within the groove.

A compression ring for a shrouded compressor including a radially inner surface having one or more areas configured to mate flush with one or more portions of a radially outward surface of a shroud of the shrouded compressor, a radially outer surface located opposite the radially inner surface, a labyrinth seal located on the radially outer surface, a groove located within the radially inner surface, and a load ring located within the groove.

An open cooling space or spiral cooling channel is formed between channel walls of a spool and an outer housing of a rotating shaft seal. The spool is sealed to the housing at the two ends thereof, does not intrude into the cooling inlet or outlet, and is axially removable and exchangeable without being distorted, thereby avoiding damage to the spool and/or contact between the spool and rotating seal elements. Due to the easy installation and removal of the spool, it can be installed as an upgrade after seal installation, and is easily cleaned and replaced. The cooling channel can be terminated by inlet and outlet rings, such that the spool does not require any rotational alignment within the seal assembly. The cooling channel can have a square or rectangular cross-section, thereby increasing thermal exchange between the cooling channel and the cooling channel spool rendering the cooling more efficient.

An open cooling space or spiral cooling channel is formed between channel walls of a spool and an outer housing of a rotating shaft seal. The spool is sealed to the housing at the two ends thereof, does not intrude into the cooling inlet or outlet, and is axially removable and exchangeable without being distorted, thereby avoiding damage to the spool and/or contact between the spool and rotating seal elements. Due to the easy installation and removal of the spool, it can be installed as an upgrade after seal installation, and is easily cleaned and replaced. The cooling channel can be terminated by inlet and outlet rings, such that the spool does not require any rotational alignment within the seal assembly. The cooling channel can have a square or rectangular cross-section, thereby increasing thermal exchange between the cooling channel and the cooling channel spool rendering the cooling more efficient.

A piston rod sealing system for a reciprocating machine (1), including a piston rod (8) having a first end (8a) connected to a piston (9), and a second end (8b) connected to a crankshaft (10), the piston rod (8) being received within a housing (7); and a sealing unit (11) provided between the piston rod (8) and the housing (7), and having a first lateral surface (12a) facing the first end (8a) and a second lateral surface (12b) facing the second end (8b). The sealing unit (11) includes a first rod seal (13) positioned in the vicinity of the first lateral surface (12a) and a second rod seal (14) positioned between the first rod seal (13) and the second lateral surface (12b), the sealing unit (11) being fixed within the housing (7). The second rod seal (14) includes a liquid injection pipe (15).

Sealing device including a first annular element coupled to a first fixed mechanical member, and a second annular element coupled to a second rotating mechanical member, for protecting an annular compartment delimited between the members; the first element being provided with at least one annular sealing lip configured to interact with the second element, which has a radial edge of a flange portion arranged at an edge of a sleeve portion of the first element, thus forming with the latter a radial gap configured as a labyrinth seal; wherein the radial gap of the flange portion of the second annular element carries a plurality of depressions arranged in a crown, spaced adjacently to one another at the radial gap and configured to generate, as a result of the rotation of the second element, a dynamic effect (F) for the purpose of repelling any contaminants impelled towards the radial gap.

A transmission (G) for a motor vehicle includes a housing (GG), a shaft (W, GW2, DS1, DS2) mounted in the housing (GG) and protruding from the housing (GG), a radial shaft seal (DR) having a sealing lip for sealing an oil space (NR) within the housing (GG) with respect to an exterior, a shaft grounding device (E) arranged on an exterior side of the radial shaft seal (DR) for establishing an electrically conductive sliding contact (SK) between the shaft (W, GW2, DS1, DS2) and the housing (GG), and a sleeve-shaped covering element (C) fixedly connected to the shaft (W, GW2, DS1, DS2) for protecting the sliding contact (SK) against environmental influences. The shaft grounding device (E) is fixedly connected to the housing (GG). The covering element (C), together with the grounding device (E), forms a labyrinth sealing. An electric axle drive (EA) may include the transmission (G).

A transmission (G) for a motor vehicle includes a housing (GG), a shaft (W, GW2, DS1, DS2) mounted in the housing (GG) and protruding from the housing (GG), a radial shaft seal (DR) having a sealing lip for sealing an oil space (NR) within the housing (GG) with respect to an exterior, a shaft grounding device (E) arranged on an exterior side of the radial shaft seal (DR) for establishing an electrically conductive sliding contact (SK) between the shaft (W, GW2, DS1, DS2) and the housing (GG), and a sleeve-shaped covering element (C) fixedly connected to the shaft (W, GW2, DS1, DS2) for protecting the sliding contact (SK) against environmental influences. The shaft grounding device (E) is fixedly connected to the housing (GG). The covering element (C), together with the grounding device (E), forms a labyrinth sealing. An electric axle drive (EA) may include the transmission (G).