High-efficiency steam turbine low-pressure cylinder exhaust device

By introducing an atomizing nozzle water spraying cooling mechanism and installation mechanism into the exhaust device of the low-pressure cylinder of the steam turbine, the problem of deformation of the exhaust cylinder caused by excessively high steam exhaust temperature was solved, and effective steam cooling and stable operation of the device were achieved.

CN121111404BActive Publication Date: 2026-07-17SHANDONG HEDE ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG HEDE ENERGY TECH CO LTD
Filing Date
2025-11-03
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

During the startup and speed increase process of a steam turbine, excessively high steam exhaust temperature can cause deformation of the exhaust cylinder, disrupting the consistency of the center lines of the turbine's moving and stationary parts. This results in excessive bearing vibration, preventing the speed increase process from being completed and affecting the operation of the unit.

Method used

A high-efficiency exhaust device for the low-pressure cylinder of a steam turbine was designed. It uses an atomizing nozzle water spraying cooling mechanism and an installation mechanism. The motor drives the rotating ring to make the atomizing nozzle rotate in a circle to cool the steam. The installation mechanism facilitates quick installation and disassembly of the atomizing nozzle.

Benefits of technology

It effectively prevents steam overheating, avoids deformation of the exhaust cylinder, maintains the normal speed-up process of the steam turbine, and ensures stable operation of the unit.

✦ Generated by Eureka AI based on patent content.

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    Figure CN121111404B_ABST
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Abstract

This invention discloses a high-efficiency steam turbine low-pressure cylinder exhaust device, relating to the field of low-pressure cylinder exhaust technology. It includes an exhaust cylinder with an exhaust pipe fixedly connected to its top. The top of the exhaust pipe is connected to the exhaust port of the low-pressure cylinder. Steam passing through the exhaust pipe is cooled by a cooling mechanism, which includes a fixed pipe installed on the outer wall of the exhaust pipe and an installation mechanism. By setting up the cooling mechanism, low-temperature water enters the fixed pipe through an inlet pipe, then enters the inner cavity of a fixed ring, and is sprayed out through an atomizing nozzle. Simultaneously, a motor drives a rotating ring to rotate, causing the atomizing nozzle to rotate circumferentially. Thus, during the water spraying process, the atomizing nozzle rotates circumferentially. When steam passes through the exhaust pipe and enters the exhaust cylinder, the atomized water cools the steam, preventing overheating and ensuring the proper functioning of the exhaust cylinder.
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