GB191006646A - Improvements in and relating to Marine Turbine Installations. - Google Patents

Abstract

6646. Parsons, C. A. March 16. Plant. - In marine turbine installations, the steam passes through one or more impulse stages followed by a reaction section whence the fluid passes through further impulse stages before delivery to the lower pressure reaction section, or sections. A four - shaft installation comprises high-pressure turbines a b, low-pressure turbines c, d, and cruising - turbines e f, the latter consisting of impulse sections g, h and reaction sections k, m. The turbines a, b may also be provided with impulse stages followed by a reaction section. Under cruising conditions, steam is supplied from a pipe o to the turbine c, and afterwards flows by a pipe n to the turbine f, in each case passing through both impulse and reaction sections. On delivery from the turbine f, the steam is passed in any desired manner through the remaining turbines. In the example shown, it passes through a pipe p to a branch pipe q, whence it is delivered to the port and starboard sets in parallel. When the turbines a, bare provided with imjulse stages, arrangements may be made for admitting live steam to the turbines e, f in parallel when required. In cases where an impulse section receives live and exhaust steam alternatively, or both simultaneously, double sets of inlet nozzles are provided. For high speeds steam is admitted direct to the turbines a, b, the turbines e, f running idle.