Split carbon ring type double-end-face dry gas sealing device for industrial steam turbine
An industrial steam turbine and dry gas sealing technology, which is applied to mechanical equipment, engine components, machines/engines, etc., can solve problems such as large cooling water consumption, complicated conditions, and steam energy loss
Pending Publication Date: 2020-10-23
徐冉
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Problems solved by technology
The leakage of steam will cause energy loss. In addition, the leaked steam needs to be cooled by cooling water, and the amount of cooling water is also very large.
For medium-sized steam turbine units, the annual steam leakage, cooling water consumption, and subsequent operation and maintenance costs are equivalent to more than one million yuan in operating costs
[0005] Different from the dynamic and static seals of general machinery, there are many factors affecting the shaft end seal of industrial steam turbines, and the situation is complicated
Method used
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[0029] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0030] It should be noted that, in the description of the present invention, terms such as “inside” and “outside” indicating direction or positional relationship are based on the relative indication direction or positional relationship centered on the main body of the industrial steam turbine, which is only for the convenience of description, It is not intended to indicate or imply that the device or element must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.
[0031] A split carbon ring type double-end dry gas seal d...
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The invention discloses a split carbon ring type double-end-face dry gas sealing device for an industrial steam turbine. The split carbon ring type double-end-face dry gas sealing device comprises a rotary sealing assembly and a static sealing assembly. The rotary sealing assembly comprises a shaft sleeve fixed to a shaft neck, the shaft sleeve is provided with a shaft shoulder, and movable ringsare arranged on the two sides of the shaft shoulder. The static sealing assembly comprises a sealing sleeve fixed in a machine shell and a pair of inner ring sleeves, and the inner ring sleeves are connected with the sealing sleeve. Each inner ring sleeve is sleeved with a static ring, a carbon ring and a push ring. An axial compression spring is connected between each push ring and the corresponding sealing sleeve, under the action of the axial compression springs, the push rings push the carbon rings to abut against the static rings, then contact sealing is formed between the carbon rings and the static rings and between the push rings and the inner ring sleeves, and a non-contact gas film lubrication state is formed between the static rings and the movable rings. According to the splitcarbon ring type double-end-face dry gas sealing device for the industrial steam turbine, the movable rings and the static rings have self-adjusting capacity, so that stable gas film lubrication non-contact sealing is formed between the movable rings and the static rings, high-pressure steam is sealed in a machine, energy consumption is reduced, and the energy conversion efficiency of the industrial steam turbine is improved.
Description
technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a split carbon ring double-face dry gas seal device for industrial steam turbines. Background technique [0002] The steam turbine is one of the main equipment of the steam power plant, and it is a rotary power machine that converts the energy of steam into mechanical work. The working principle of the steam turbine is that steam with a certain pressure and temperature enters the steam turbine, expands rapidly in the nozzle to obtain a high flow velocity, and then the high-speed flowing steam impels the turbine rotor blades to rotate and do work, thereby obtaining mechanical energy. A steam turbine is mainly composed of a rotating part, a fixed part and a control part. [0003] Industrial steam turbines are driven by steam, and are mainly used in chemical, petroleum, mining, metallurgy, papermaking, textile, sugar and other industrial enterprises. Industrial steam turb...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01D11/04F01D11/06F01D25/00
CPCF01D11/04F01D11/06F01D25/005
Inventor 徐冉高立军刘闯
Owner 徐冉