Confining liquid-sealing arrangement for a turbo compressor.

摘要

A confining liquid-sealing arrangement for the shaft seal in a turbocompressor, especially in a high-pressure turbocompressor, having a sliding ring (1), which seals axially on the gas side, a sliding ring (2), which seals axially on the atmosphere side, both of which are arranged fixedly in the housing (3), and a rotor ring (5), which is connected to the shaft (4) and has mutually opposite sealing surfaces to which the sliding rings (1, 2) are allocated with their sealing surfaces. A confining liquid space (6, 7) is allocated to the two sliding rings (1, 2). The confining liquid spaces (6, 7) are connected to one another at the circumferential side of the rotor ring (5). The sliding ring (2) on the atmosphere side seals the associated confining liquid space (6) to the atmosphere. The sliding ring (1) on the gas side seals the associated confining liquid space (7) to the gas space. The sliding ring seal (2) on the atmosphere side has an area ratio K in the region of 0.45 to 0.60. The sliding rings (1, 2) and the rotor ring (5) consist of a material having a modulus of elasticity of not less than 250,000 N/mm<2>.
The function gap (F), which the sliding ring (2) on the atmosphere side forms with respect to the associated housing part (3), is sealed without any centring effect by a prelocated O-ring (14). A compression spring (13) acts on the sliding ring (2) on the atmosphere side. A centring ring is arranged for centring between the housing (3) and this sliding ring (2) on the internal-diameter side.