Steam turbine push-pull rod sealing structure

Abstract

The invention provides a steam turbine push-pull rod sealing structure. The steam turbine push-pull rod sealing structure comprises a push-pull rod arranged on a bearing box, a cooling sleeve arrangedon the push-pull rod, a first sealing mechanism arranged between the cooling sleeve and the push-pull rod, a second sealing mechanism arranged between the push-pull rod and the bearing box and a third sealing mechanism arranged in the bearing box, wherein the cooling sleeve is provided with an oil return pipe, and an opening of the oil return pipe is downward and is connected with the bearing box; the first sealing mechanism comprises a sealing ring and a first inner oil baffle, and the first sealing mechanism is arranged between the push-pull rod and the cooling sleeve in a gapless manner; the second sealing mechanism comprises a sealing ring, a packing and a packing gland, and the sealing ring, the packing and the packing gland are sequentially arranged between the bearing box and the push-pull rod from inside to outside; and the third sealing mechanism comprises a sealing ring and a second inner oil baffle, and the sealing ring and the second inner oil baffle are arranged at the two ends of the push-pull rod from inside to outside. According to the steam turbine push-pull rod sealing structure, the oil leakage amount of a steam turbine is greatly reduced, the work difficulty ofworkers is greatly lowered, major potential safety hazards such as equipment fire disasters are eliminated, and effective guarantees are provided for safe running of a unit.

Description

technical field [0001] The invention belongs to the technical field of steam turbine sealing structure of a thermal power plant, and in particular relates to a sealing structure of a push-pull rod of a steam turbine. Background technique [0002] In the prior art, oil seepage occurs in the seal structure of the push-pull rod of the steam turbine during operation, which leads to obvious oil stains in the valve interlayer valve and pipeline insulation, resulting in many unsafe phenomena such as smoke from the insulation of the steam turbine middle box, which greatly affects the The safe operation of the unit and increased maintenance costs. Contents of the invention [0003] The invention provides a sealing structure of a push-pull rod of a steam turbine, which reduces oil leakage and ensures safe operation of the unit. [0004] The technical solution of the present invention is: a steam turbine push-pull rod sealing structure, including a push-pull rod arranged on the bear...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, oil seepage occurs in the seal structure of the push-pull rod of the steam turbine during operation, which leads to obvious oil stains in the valve interlayer valve and pipeline insulation, resulting in many unsafe phenomena such as smoke from the insulation of the steam turbine middle box, which greatly affects the safe operation of the unit and increased maintenance costs

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