Steam turbine

Abstract

A steam turbine has a two-shell housing, including an outer casing (1) and an inner casing (2) arranged therein, as well as a pipe (3) that extends through the outer casing (1) for supplying and / or removing steam to or from the inner casing (2), the pipe being provided with a pair of apertures (4, 5) arranged opposite each other on the inner casing (2). According to the invention, a first steam supply or discharge pipe (6) can be connected to a first aperture (4), and the second aperture (5) is closed by a cover (7).

Description

Technical field

[0001] The present invention relates to a steam turbine having a two-shell casing. The casing includes an outer casing and an inner casing arranged therein, and a connecting pipe guided through the outer casing for input and / or input to the inner casing. Or output steam, wherein the connecting pipe is provided with a pair of connecting ports configured opposite to each other on the inner shell. Background technique

[0002] When live steam or intermediate superheated hot steam is expanded in a steam turbine, it is preferable to use a two-shell structured shell on the steam turbine. At this time, expansion is performed in the inner shell surrounded by the outer shell, and the outer shell absorbs the expanded steam (waste steam). In this way, the inner shell is cooled and at the same time bears most of the pressure, which makes sense especially at high steam pressures. In order to compensate for the radial or lateral shearing force caused by thermal expansion, the...

Examples

Embodiment Construction

[0018] The figure is a cross-sectional view of the steam turbine according to the present invention. At its center is the shaft 11 which is surrounded by the inner shell 2. The inner shell can be implemented axisymmetrically, but it does not have to be axisymmetric. An outer shell 1 is arranged around the inner shell 2 which can likewise be implemented axisymmetrically. Through the steam conveying pipe 6, fresh steam or hot intermediate superheated steam or waste steam can be input or output into the inner shell 2 under a large pressure. The subsequent expansion by the input steam causes the shaft 11 to be driven. The expanded steam is then guided through the cavity between the outer shell 1 and the inner shell 2, thereby cooling the inner shell 2.

[0019] The steam turbine has a connecting pipe 3 which leads through the outer casing 1 not only from the left but also from the right as shown in the drawing, for feeding steam into and / or out of the inner casing 2. The connecti...

Technical field

[0001] The present invention relates to a steam turbine having a two-shell casing. The casing includes an outer casing and an inner casing arranged therein, and a connecting pipe guided through the outer casing for input and / or input to the inner casing. Or output steam, wherein the connecting pipe is provided with a pair of connecting ports configured opposite to each other on the inner shell. Background technique

[0002] When live steam or intermediate superheated hot steam is expanded in a steam turbine, it is preferable to use a two-shell structured shell on the steam turbine. At this time, expansion is performed in the inner shell surrounded by the outer shell, and the outer shell absorbs the expanded steam (waste steam). In this way, the inner shell is cooled and at the same time bears most of the pressure, which makes sense especially at high steam pressures. In order to compensate for the radial or lateral shearing force caused by thermal expansion, the...

Examples

Embodiment Construction

[0018] The figure is a cross-sectional view of the steam turbine according to the present invention. At its center is the shaft 11 which is surrounded by the inner shell 2. The inner shell can be implemented axisymmetrically, but it does not have to be axisymmetric. An outer shell 1 is arranged around the inner shell 2 which can likewise be implemented axisymmetrically. Through the steam conveying pipe 6, fresh steam or hot intermediate superheated steam or waste steam can be input or output into the inner shell 2 under a large pressure. The subsequent expansion by the input steam causes the shaft 11 to be driven. The expanded steam is then guided through the cavity between the outer shell 1 and the inner shell 2, thereby cooling the inner shell 2.

[0019] The steam turbine has a connecting pipe 3 which leads through the outer casing 1 not only from the left but also from the right as shown in the drawing, for feeding steam into and / or out of the inner casing 2. The connecti...

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