Oil sealing device on end part of steam turbine shaft

Abstract

The invention discloses an oil sealing device on end part of a steam turbine shaft. The oil sealing device mainly comprises a sealing ring. The oil sealing device is characterized in that: the sealing ring mainly comprises an outer sealing ring and an inner sealing ring, and an inflation tube, wherein the outer sealing ring is fixedly arranged on a steam turbine support; the inner sealing ring is sleeved on the steam turbine shaft; the outer sealing ring and the inner sealing ring are distributed in a stepped mode and the outer sealing ring is connected with the inner sealing ring through a sealing plate; the inner ring port of the inner sealing ring is provided with sealing teeth; the air inlet of the inflation tube is arranged on the ring surface of the outer sealing ring, and the air outlet of the inflation tube is arranged in a clearance between the sealing teeth on the inner sealing ring; and the sealing ring is also provided with a mounting hole and a positioning hole. In the oil sealing device on the end part of the steam turbine shaft, the special outer sealing ring and the special inner sealing ring are distributed in a stepped mode, so a shaft coupling is open and exposed outwards; and the outer sealing ring and the inner sealing ring are in good fit with the steam turbine support and the steam turbine shaft well respectively, so full enclosed state of oil at the two ends of the steam turbine shaft and excellent sealing effect are achieved.

Description

technical field [0001] The invention relates to a sealing device applied to a steam turbine, in particular to an oil sealing device at the shaft end of the steam turbine. Background technique [0002] Both ends of the steam turbine shaft in the current design are open, without any oil sealing measures. The oil sealing at both ends of the steam turbine shaft is completed by the coupling and the shield, and the shield covers the coupling and cooperates with the coupling. To achieve a good sealing effect. Although such a structural design can meet the requirements of production and operation in terms of oil sealing, due to the existence of the shield and the direct contact of the coupling with the leaked oil during sealing, it has brought certain problems to the safe and stable operation of the coupling. Impact. [0003] Moreover, since the coupling is a key connecting part, it is particularly important in the supporting operation. The standards for the coupling of each steam...

AI Technical Summary

Problems solved by technology

Although such a structural design can meet the requirements of production and operation in terms of oil sealing, due to the existence of the shield and the direct contact of the coupling with the leaked oil during sealing, it has brought certain problems to the safe and stable operation of the coupling. Impact

[0003] Moreover, since the coupling is a key connecting part, it is particularly important in the supporting operation. The standards for the coupling of each steam turbine manufacturer are also different. However, with the development and development of the market, changes in supporting manufacturers, and user requirements, steam turbine shaft The design of oil seals at both ends can no longer meet the needs of the market. For example, ATLAS resolutely does not use the form of the shield to cover the coupling to achieve oil seal.

[0004] In order to better adapt to the development of the steam turbine industry, the end of the steam turbine shaft should be made fully enclosed, but the existing oil sealing device cannot meet this demand

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