Common body structure of cylinder and steering guide vane ring of single stage steam turbine of ship

Abstract

The invention relates to a common body structure of a cylinder and a steering guide vane ring of a single stage steam turbine of a ship. The common body structure comprises the cylinder and the steering guide vane ring, wherein the steering guide vane ring is arranged on one side of a cylinder wall and is integrated with the cylinder wall to form the common body structure of the cylinder and the steering guide vane ring. As the cylinder wall and the steering guide vane ring structure are integrated, the weight is light. As the stiffness of the cylinder wall remains unchanged, the weight of a whole machine decreases, and the modal frequency of the whole steam turbine machine is increased. cylinder size reduction is conducive to miniaturization design. The pitch circle size of the steam turbine stage can be increased, so that the power capacity of the steam turbine stage can be increased. For the single stage steam turbine, as the assembly adjustment caused by the inter-stage machining error of a multi-stage steam turbine is not involved, the assembly adjustment process is reduced and the dynamic and static clearance accuracy of the steam turbine is improved after the cylinder wall and the steering guide vane ring structure are integrated.

Description

technical field [0001] The invention relates to a ship rotary mechanical structure, in particular to a ship single-stage steam turbine cylinder and steering vane ring structure. Background technique [0002] Conventional steam turbines, regardless of land use or marine use, single-stage or multi-stage, all adopt a separate assembly structure of the cylinder and the steering vane ring, such as figure 1 , figure 2 shown. The turning guide vane ring is composed of guide vane ring body and guide vanes (one row or several rows). The radial positioning between the cylinder and the steering guide vane ring is carried out by distance pins, and the mid-section surface is fixed by a pressure plate. For multi-stage steam turbines, a split assembly structure is adopted to facilitate the adjustment of dynamic and static clearance deviations caused by machining errors between different stages; single-stage steam turbines (extremely rare in the field of land use) follow the split desig...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a structure in which the single-stage steam turbine cylinder and the steering vane ring are integrated to replace the conventional split assembly structure of the cylinder and the steering vane ring, so as to solve the size of the conventional split assembly structure. Large size, heavy weight, and large assembly workload to meet the requirements of miniaturization and light weight of single-stage steam turbines in ships or to improve efficiency within a limited size

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