Radial sealing system

A sealing assembly for limitation of fluid flow along a rotatable shaft that is passed through a housing member that separates a high pressure side and a low pressure side, wherein the sealing assembly comprises:

• a rotor connected to the rotatable shaft, and with a sealing surface which essentially extends radially in relation to the shaft,
• a flushing sealing system that extends between the rotor and the housing member, the flushing sealing system in contact with both the housing member and the sealing surface of the rotor to provide a sealing effect,
• the flushing sealing system comprising first and second elastic sealing members that each comprise a separate ring-shaped sealing member arranged to surround a fluid chamber which is connected to atmosphere by a discharge pipe, the first and second elastic sealing members working in series, and the first elastic sealing member is adapted to imposes a pressing force directed to the sealing surface,
• a transport groove pattern with at least one running groove with a driving edge and in fluid connection with the high-pressure side and the low-pressure side, the transport groove pattern provided in the sealing surface of the rotor,
• a fluid leak path formed between the first sealing member and the transport groove pattern and configured for flushing of the flushing sealing system for the purpose of forming a hydrodynamic protective fluid film for the sealing assembly and to reduce pressure from the high-pressure side to the low-pressure side,
• a transport groove in the transport groove pattern having, in cross-sectional view, gradual transitions to the sealing surface, the first elastic sealing member at least partially extending into the transport groove in order to suppress fluid leakage through the fluid leak path,
• a dimensionally stable support frame connected with the housing member to support the first elastic sealing member, and a spring system that preloads the support frame towar the rotor,
• an additional sealing system that engages the housing member and the support frame to provide a sealing effect, the additional sealing system comprising a spacer ring connected to the housing member, and a sealing member contacting the spacer ring and the dimensionally stable support frame, the sealing member applying a radial sealing force.