Cylinder structure with built-in steam seal pipeline and built-in steam seal pressure regulator

Abstract

The invention relates to a cylinder structure with a built-in steam seal pipeline and a built-in steam seal pressure regulator. The cylinder structure with the built-in steam seal pipeline and the built-in steam seal pressure regulator is characterized in that a steam seal balance pipeline and a steam seal exhaust pipeline are built in a flange of a split surface of a lower cylinder, and the steamseal balance pipeline and the steam seal exhaust pipeline are sealed with the interior of a cylinder through a split surface of an upper cylinder; and the steam seal balance pipeline is connected with a main steam inlet pipeline through a steam seal steam supplementing valve on the side face of the upper cylinder, steam seal steam supplementing is adjusted through the steam seal steam supplementing valve, a steam seal pressure adjusting mechanism is arranged on the main steam inlet pipeline, the pressure of main steam entering the steam seal balance pipeline is adjusted by adjusting gaps of the main steam inlet pipeline, and a steam seal system is kept balanced. Through the cylinder structure with the built-in steam seal pipeline and the built-in steam seal pressure regulator, steam turbine matched pipelines are greatly reduced, meanwhile, external steam seal regulating devices are reduced, the integration degree of a marine steam turbine is improved, and the maintenance space of equipment is increased; and the constraint of a pipeline on axial expansion of the steam turbine is relieved, and vibration and noise reduction design of the equipment is facilitated.

Description

technical field [0001] The invention relates to a marine condensing steam turbine, in particular to a cylinder structure of a marine condensing steam turbine. Background technique [0002] The steam seal system is mainly to prevent steam from leaking from the cylinder into the installation site of the steam turbine, and at the same time prevent air from leaking into the cylinder, which will affect the vacuum degree of the unit and lead to accelerated oxidation of the equipment. Another function of the steam seal system is to recover the steam leakage from the high-pressure regulating valve and the high-pressure steam seal of the steam turbine. , recover heat, and improve the thermal efficiency of the secondary loop system. [0003] Due to the tight space of the marine steam turbine, on the basis of the steam seal system of the land steam turbine, the pressure equalization box structure (seal pressure adjustment function) is used to adjust the steam seal pressure. The pressur...

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Problems solved by technology

[0004] The main problem of the existing marine steam seal system is that the space is cramped and narrow, and multiple thick steam seal lines and steam seal pressure adjustment devices are arranged around the steam turbine, which increases the complexity of the system; at the same time, the temperature of the steam seal line is lower than that of the cylinder , the amount of expansion and deformation restricts the deformation of the cylinder, which is not conducive to the vibration and noise reduction of the steam turbine; moreover, the pipeline affects the maintenance space of the steam turbine, increases the maintenance time of the unit, and is not conducive to the quick return to normal operation of the unit

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