Mechanical air leakage prevention device for steam turbine

Abstract

The invention discloses a mechanical air leakage prevention device for a steam turbine. The mechanical air leakage prevention device for the steam turbine comprises a main shaft and a nozzle, the nozzle is arranged above the main shaft, impellers are arranged on the upper and lower sides of the main shaft, and moving blades are arranged on the upper sides of the impellers. The impellers and the moving blades are fixedly connected by welding, and the left side of each moving blade is provided with a fixing device. An anti-leakage device effectively prevents the leakage of steam, gas can be sucked by a high-pressure suction machine for recycling, and leaked gas is effectively reused the leaked gas. Elasticity of a rubber protection ring and a hydraulic telescopic rod in each fixing device can effectively resist the pressure when the nozzle absorbs gas, and thus the nozzle and a cylinder are connected more closely. A return air outlet ensures normal use of the leaked steam of the equipment, and a leak-proof baffle and a spring rotary shaft are arranged inside the return air outlet to ensure all out without in, so that no gas leakage occurs at the location.

Description

technical field [0001] The invention relates to the technical field of steam turbines, in particular to a mechanical air leakage prevention device for steam turbines. Background technique [0002] The steam turbine is the main device for power generation at present. It is easy to leak air at the connection between the nozzle and the cylinder, which causes the steam turbine valve to fail when the speed is adjusted. The current treatment methods are basically "blocking" to solve it. However, blocking is not as good as dredging If the corresponding equipment is used to re-transmit the leaked steam to the nozzle, it can not only effectively solve the problem of frequent air leakage of the steam turbine, but also solve the problem of speed regulation failure due to insufficient air leakage. Contents of the invention [0003] (1) Technical problems to be solved: the existing steam turbines are often prone to air leakage at the connection between the nozzle and the cylinder due t...

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Problems solved by technology

[0003] (1) Technical problems to be solved: the existing steam turbines are often prone to air leakage at the connection between the nozzle and the cylinder due to untimely maintenance during use, resulting in failure of the steam turbine control valve during speed regulation, and gas leakage occurs , may cause accidents in severe cases

[0004] In order to overcome the deficiencies of the existing technology, a steam turbine mechanical anti-leakage device is proposed to solve the problem that the above-mentioned existing steam turbine is often prone to air leakage at the connection between the nozzle and the cylinder due to untimely maintenance during use, resulting in the failure of the steam turbine. The adjustment door fails during speed regulation, and gas leakage occurs. In serious cases, it may cause accidents and achieve the effect of preventing gas leakage.

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