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Efficient oil seal structure of steam turbine

A steam turbine and steam turbine rotor technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as difficult disassembly and replacement, shortened service life of rotors or oil seals, etc., to achieve extended service life, good end sealing effect, The effect of avoiding wear

Active Publication Date: 2018-10-09
中国船舶重工集团公司第七0三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problem that the existing steam turbine oil seal structure is fixedly installed on the bearing box or bearing housing, the wear of the rotor or oil seal will shorten the service life, and it is not easy to disassemble and replace, and provides a high-efficiency oil seal structure of the steam turbine

Method used

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  • Efficient oil seal structure of steam turbine
  • Efficient oil seal structure of steam turbine
  • Efficient oil seal structure of steam turbine

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0020] Specific implementation mode 1: This implementation mode is a high-efficiency oil seal structure of a steam turbine, such as Figure 1-Figure 5 , specifically composed of a first semi-annular body 1, a second semi-annular body 2, a bolt 3 and a pin 4;

[0021] The two annular ends of the first semi-circular body 1 are respectively provided with a first end strap 1-4, and the first end strap 1-4 and the first semi-circular body 1 are in a staggered structure, and the first An end face of the end strap 1-4 is flush with an end face of the first semi-circular body 1; a first threaded hole 1-2 and a first pin are respectively set on the two first end straps 1-4 Holes 1-3, a first groove 1-1 is respectively arranged along the inner ring on the two end faces of the first semi-annular body 1, and multiple grooves are evenly arranged on the inner ring side wall of the first semi-annular body 1. A semi-cylindrical oil groove 5; the semi-cylindrical oil groove 5 is open on the e...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that: the gap between the inner ring side walls of the first semi-annular body 1 and the second semi-annular body 2 and the steam turbine rotor is 0.03 mm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the gap between the inner ring side wall of the first semi-annular body 1 and the second semi-annular body 2 and the steam turbine rotor is 0.04 mm. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an efficient oil seal structure of a steam turbine and relates to an oil seal structure. The invention aims to solve the technical problem that the service life of the oil sealstructure will be shortened as a rotor or an oil seal wears and the oil seal structure is unlikely to detach and replace as the oil seal structure of an existing steam turbine is fixedly mounted on abearing box or a bearing shell. The efficient oil seal structure is composed of a first semi-ring body and a second semi-ring body; the first semi-ring body is of a staggered structure, and a plurality of semi-cylindrical oil grooves are uniformly formed in the inner ring side wall of the first semi-ring body; the semi-cylindrical oil grooves are opened in the upper end surface of the second semi-ring body and are closed in the lower end surface of the first semi-ring body; a first tail end butt strap of the first semi-ring body and a second tail end butt strap of the second semi-ring body are overlapped and fixed together in a staggered manner. The oil seal structure disclosed by the invention is small in mounting space, small in axial dimension, easy to process, small in oil seal gap, good in sealing effect and long in service life, and has good adaptability to vibration and eccentricity of the rotor.

Description

technical field [0001] The invention relates to an oil seal structure. Background technique [0002] In steam turbine design, the steam turbine rotor is generally supported by sliding bearings, and the bearings are forced to lubricate and cool with pressure lubricating oil. In order to ensure the safe operation of the steam turbine, an oil seal structure is designed at the end of the bearing and the bearing box of the steam turbine to prevent the leakage of lubricating oil in the bearing box, ensure sufficient cooling oil in the bearing, and avoid burning of the bearing. [0003] The traditional oil seal structure generally adopts a toothed oil seal structure, which is fixedly installed on the bearing box or bearing housing. If the oil seal gap used in this structure is large, the oil seal effect will be poor; if the gap is too small, it will cause wear on the rotor shaft diameter, and the rotor or Oil seal wear will shorten the service life, and because the steam turbine i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/18F01D25/16
CPCF01D25/162F01D25/166F01D25/183F01D25/186F05D2240/55
Inventor 董士伟刘统章齐雅薇宋禹林宋苗苗陈齐李佳冀曹世裕
Owner 中国船舶重工集团公司第七0三研究所