Novel integrated high-medium-pressure internal cylinder applied to supercritical steam turbine

Abstract

The invention discloses a novel integrated high-medium-pressure internal cylinder applied to a supercritical steam turbine, relating to a high-medium-pressure internal cylinder structure of a steam turbine and aims at solving the problems of low high-medium-pressure through flow efficiency, unit heat consumption increment and low assembly efficiency caused by an assembling gap existing between both assembly surfaces of a high-pressure part and a medium-pressure part of the existing supercritical steam turbine unit. The high-medium-pressure internal cylinder, a high-pressure diaphragm sleeve and a 1# medium-pressure diaphragm sleeve are integrated, and a vane of the high-pressure part is directly arranged on the high-medium-pressure internal cylinder. A high-pressure steam inlet, a medium-pressure steam inlet, a 0# high-pressure heater steam extraction opening, a 1# high-pressure heater steam extraction opening, a high-medium-pressure steam inlet side balancing hole and a diaphragm slot are integrated into an integrated part. Due to the adoption of the integrated structure of the novel integrated high-medium-pressure internal cylinder, the efficiencies of the high-pressure part and the medium-pressure part of the unit are increased, steam leakage loss is reduced, the heat consumption of the whole unit is reduced, and the benefit of a power plant is increased; in addition, the high-medium-pressure assembly can be reduced, the processibility is good, the final assembly is simple, time and labor are saved, and the field installation period is shortened. The novel integrated high-medium-pressure internal cylinder is suitable for the supercritical steam turbine.

Description

technical field [0001] The invention belongs to the field of high and medium pressure inner cylinder structures of steam turbines. Background technique [0002] The high and medium pressure parts of the existing supercritical units have many parts that can be assembled. There are assembly surfaces between the parts and there are assembly gaps between the parts, which increases the steam leakage during the operation of the unit and reduces the efficiency of the unit. , increasing the heat consumption of the unit. And because there are many parts to assemble, the efficiency of the final assembly is low, the structure of the unit is complicated, and the processing and installation of the unit is time-consuming and laborious, which increases the cost. Contents of the invention [0003] The present invention aims to solve the problems of low efficiency of high and medium pressure flow, increased heat consumption of the unit, and low assembly efficiency due to the assembly gap ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of low efficiency of high and medium pressure flow, increased heat consumption of the unit, and low assembly efficiency due to the assembly gap between the assembly surfaces of the existing supercritical steam turbine unit. A New Integral High and High Pressure Inner Cylinder Applied in Supercritical Steam Turbine

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