GB796269A - Turbines having devices for distributing cleaning agents for the blade channels - Google Patents

Abstract

796,269. Gas turbine plant. SULZERFRERES SOC. ANON. Nov. 5, 1956 [Nov. 10, 1955], No. 33771/56. Class 110 (3). A turbine comprising an annular nozzle header having nozzles through which a cleansing agent may be directed into the turbine blade channels has the header mounted coaxially with the turbine axis and spaced from the inlet end of the stator blade carrier by an annular gap through which cooling air can pass. Working medium from the intake 1 passes through the passage 2 to the blade channels 3 of a turbine comprising a stator blade carrier 4, a rotor 5 and first stator blade ring 6. An annular nozzle header 8 is secured to the end face 7 of the stator blade carrier 4 by means of brackets 9 and bolts 10 which pass through radial slots 22 to permit radial expansions and contractions. A gap 12 between the stator blade carrier 4 and header 8 allows the passage of cooling air to the annular gap 13. The inner circumferential surface 14 of the header 8 forms part of the inlet passage 2. Nozzles 15 are provided to direct the cleansing fluid towards the first blade-ring 6. In a modification, the single row of nozzles 15 is replaced by a number of nozzle rows directed at different angles to the turbine axis. In a further modification, Fig. 3 (not shown), the nozzle header 8 is arranged outside of the wall of the passage 2. In another modification in which the nozzle header is arranged outside the passage, the nozzles 15 are formed by tubes and the supporting brackets are made resilient to permit radial expansion and contraction. The header 8 may consist of a single annular member or be composed of a number of segmental members.