HIGH-PRESSURE EXPANSION TURBINE Russian patent published in 1995 - IPC

FIELD: cryogenic and refrigerating engineering. SUBSTANCE: high-pressure expansion turbine has load-bearing housing where 3rd stage housing with flow section 4 is located; radial spacer 23 made of heat-insulating material is mounted in zone of labyrinth seal. Cylindrical bush 19 is mounted outside 3rd stage housing in zone of flow section 4. Rotor suspension unit 5 is provided with stabilizing sleeve 14. Bearings 11 and 12 are radial thrust sliding bearings which are secured in stabilizing sleeve 14; their radial portion is divided into two sections by circular chamber connected with oil discharge line by means of passage. Provision is made for cylindrical bush 19 with sealing strips; labyrinth seal is three-sectional with supply and discharge of warm gas between sections. Radial spacer 23 and cylindrical bush 19 may be made of fluoroplastic. EFFECT: enhanced reliability. 4 cl, 6 dwg