Abstract: The invention relates to a multistage brush seal of a steam turbine that comprises several brushes which in turn comprise several bristles. A plurality of brushes are arranged next to each other and are configured different from each other with regard to the length of the bristles, or to the bristle thicknesses, or to the bristle rigidities, or to the lay angle of the bristles, or to the height of a first guard ring in front of or behind the brush seal in the flow direction, which delimits this brush seal, or to a gap between the bristles and an opposing surface.

Abstract: The invention relates to a multistage brush seal of a steam turbine, the brush seal comprising several brushes which in turn comprise several bristles. Conventional multistage brush seals have a conservative configuration because a precise prediction regarding the pressure difference of a single stage is not possible. The aim of the invention is therefore to provide a brush seal that allows a more precise prediction in respect of the pressure difference in a single stage or brush and thus provides a more precise dimensioning of the brush seal while achieve possible savings. The invention proposes that the adjacently arranged brushes have a varying configuration in respect of different parameters.

Abstract: In sealing arrangement 41 between first and second relatively rotatable bodies of a machine such as a steam turbine, a relatively high pressure p0 exists on one side of the sealing arrangement and a relatively low pressure pf exists on the other side. The sealing arrangement comprises a series of sealing elements or units S1, S2, S3, at least one of which comprises a brush seal. A seal bypassing device, preferably comprising a pressure relief valve 42-44 limits the pressure drop across the brush seal.

Abstract: The invention relates to a brush seal for sealing a gap between a rotor and a stator, with at least one brush ring, comprising a number of sealing brushes and at least two annular brush ring carriers, running in the circumferential direction of the rotor. Each brush ring is fixed between a first front face of a first brush ring carrier and a second front face of a second brush ring carrier, whereby the second brush ring carrier is directly axially and radially fixed to the first brush ring carrier.

Abstract: The invention relates to a brush seal for sealing a gap between a rotor and a stator, with at least one brush ring, comprising a number of sealing brushes and at least two annular brush ring carriers, running in the circumferential direction of the rotor. Each brush ring is fixed between a first front face of a first brush ring carrier and a second front face of a second brush ring carrier, whereby the second brush ring carrier is directly axially and radially fixed to the first brush ring carrier.

Abstract: In sealing arrangement 41 between first and second relatively rotatable bodies of a machine such as a steam turbine, a relatively high pressure p0 exists on one side of the sealing arrangement and a relatively low pressure pf exists on the other side. The sealing arrangement comprises a series of sealing elements or units S1, S2, S3, at least one of which comprises a brush seal. A seal bypassing device, preferably comprising a pressure relief valve 42-44 limits the pressure drop across the brush seal.

Abstract: A rotor seal, especially for turbo engines, is described. The sealing elements are folded from a pleated band and are connected to each other even when the rotor seal is in the assembled state. The barrier effect of the inventive rotor seal is thus increased in relation to lamella seals that always require a gap between the individual lamella.

Abstract: A device for compensating an axial thrust in a turbomachine is described. A compensating piston is disposed in a compensation chamber and contains at least one radial seal operant between a rotor and a housing of the turbomachine in addition to a running wheel secured to the rotor. An axial seal is provided between a side surface pertaining to the compensating piston and the housing. An axial gap width is variable in the same manner as the axial displacement of the running wheel occurring during operation and the compensating piston is impinged upon by the pressure prevailing in the compensating chamber according to the axial gap width.

Abstract: A rotor seal, especially for turbo engines, is described. The sealing elements are folded from a pleated band and are connected to each other even when the rotor seal is in the assembled state. The barrier effect of the inventive rotor seal is thus increased in relation to lamella seals that always require a gap between the individual lamella.

Abstract: A device for compensating an axial thrust in a turbomachine is described. A compensating piston is disposed in a compensation chamber and contains at least one radial seal operant between a rotor and a housing of the turbomachine in addition to a running wheel secured to the rotor. An axial seal is provided between a side surface pertaining to the compensating piston and the housing. An axial gap width is variable in the same manner as the axial displacement of the running wheel occurring during operation and the compensating piston is impinged upon by the pressure prevailing in the compensating chamber according to the axial gap width.

Abstract: A condensing turbine includes a live-steam inlet, an exhaust-steam outlet and at least two seals for sealing off a turbine casing in the region of a turbine shaft carrying a turbine rotor. At least one of the seals is disposed on the live-steam side and one of the seals is disposed on the exhaust-steam side. The overall construction is substantially simplified by constructing at least one respective seal as a gas-lubricated mechanical surface seal on both the live-steam side and the exhaust-steam side. The outermost mechanical surface seals in each case on the live-steam side and the exhaust-steam side seal off separate seal spaces which are acted upon through a balancing line by an identical vacuum lying below the outer atmospheric pressure. These mechanical surface seals are constructed and fitted in such a way that a flow which is necessary for gas lubrication can occur through the mechanical surface seals from the outer atmosphere into the interior of the casing.