CONTROL TURNABLE DIAPHRAGM WITH DRIVE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; steam turbines. SUBSTANCE: proposed axial or radial-type control turnable diaphragm with drive consists of fixed diaphragm and turnable outer ring into operation by servomotors through from one or two sides. All known drives of turnable ring have evident drawbacks, namely, fire hazard, if servomotors are secured on cylinder housing, complex design of drive and servomotors, friction of turnable ring in place of bore against turned surface of fixed diaphragm in upper point of contact. So, drive is to overcome friction forces and lifting of some part of ring weight in process of turning. Invention solves the problem of dispensing with design drawbacks by logic solutions after corresponding setting of turnable ring. According to proposed invention, ring is suspended by shackles, rod and movable tie-rods with ball joints from rocker secured through axle in bracket installed on turnable cylinder. Axle of ring is set concentrically relative to axle of diaphragm to form ring clearance on diameter between ring and diaphragm. Ring turns by weight with minimum forces from point of application by any chosen drive. EFFECT: improved quality of operation. 9 dwg