FIELD: mechanical engineering; steam turbines. SUBSTANCE: stator part has guide assembly, diaphragms of subsequent stages and lip to create overbandage sealing of impeller located behind guide assembly with designed thermodynamic clearance C. Lip is made on stator member of stages located behind first stage with guide assembly and it is secured on diaphragm holder. Lip is located opposite to guide assembly rim forming ring slot A with rim. Size of slot is 2 - 3 times greater than that of clearance C. Circular blind chamber is formed in housing behind the slot. Such design makes it possible to remove solid abrasive particles from steam flow. EFFECT: increased reliability of turbine operation and its service life. 1 dwg
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