CN214273810U - Air inlet contraction section structure of heavy gas turbine - Google Patents

Abstract

The utility model relates to an air inlet contraction section structure of a heavy gas turbine, in particular to the design of the air inlet contraction section structure, belonging to the technical field of gas turbines; the problem that the structure size of the contraction section of the existing heavy gas turbine wheel is unreasonable is solved; the structure comprises an air inlet front section, a contraction section, a turning section and a compressor, wherein the contraction section comprises a contraction section head part and a contraction section tail part; the main flow air is taken as a positive direction in a reverse direction and passes through an air inlet front section, a contraction section head, a contraction section tail, a turning section and an air compressor; the air inlet front section is connected with the head of the contraction section; the tail part of the contraction section is horizontally connected with the turning section along the air inlet direction; the position of giving vent to anger of turn section at last links to each other with the compressor, the utility model is suitable for a heavy gas turbine large-traffic requirement of admitting air according to the isostructure of turn section, no matter go up the air admission or admit air down and all can satisfy the design requirement. Through three-dimensional calculation, stable transition of airflow can be guaranteed, and lower pressure loss is guaranteed.

Description

Air inlet contraction section structure of heavy gas turbine

Technical Field

The utility model discloses a heavy gas turbine air intake system's shrink section structure especially relates to the design of the shrink section structure that admits air, belongs to gas turbine technical field.

Background

The heavy gas turbine is the heat-power conversion type power generation equipment with the highest efficiency so far, is the core equipment in the field of power generation and driving, and is greatly difficult to design and manufacture, so that the industrial level of a country is reflected in a centralized mode, but the structural size of an air inlet pipeline of the heavy gas turbine is also huge, the structure selected at present is simple in order to install conveniently, but generally, the pressure loss is large, and particularly, if the structural design of a contraction section and a turning section of the air inlet pipeline is unreasonable, the pressure loss is greatly increased, so that huge manpower and financial loss is caused.

Therefore, the structure of the part not only ensures the stable transition of the air flow, but also ensures the reasonable space size, but the structure of the contraction section of the existing reburning gas turbine suitable for lower air inlet is rare, and the urgent requirements of the rapid development and cost reduction of modern gas turbines in China cannot be met.

SUMMERY OF THE UTILITY MODEL

For solving the unreasonable problem of current heavy gas turbine wheel contraction section structure size, the utility model provides a heavy gas turbine's contraction section structure that admits air constitutes structure concrete scheme as follows:

the structure comprises an air inlet front section, a contraction section, a turning section and a compressor, wherein the contraction section comprises a contraction section head part and a contraction section tail part;

the air inlet front section, the contraction section head, the contraction section tail, the turning section and the air compressor are sequentially connected along the main air flow direction;

the contraction section is designed with a certain angle, the inclined plane and the straight plane are in radius transition with a certain radius, the angle alpha of the inclined plane at the top of the contraction section is 35 degrees +/-5 degrees, the angle beta of the inclined plane at the top of the contraction section is 40 degrees +/-5 degrees, and the included angle theta of the radius is 55 degrees +/-5 degrees.

Further, the total height of the air inlet contraction section structure of the heavy-duty gas turbine is H, the range is 15000-18000 mm, H1 is arranged above the head of the contraction section, wherein H1 is 0.1H, the height of the head of the contraction section is H-H1, the width of the head of the contraction section is B1, and B1 is H;

the tail height of the constriction segment is H2, H2 is 0.4H, the tail width of the constriction segment is B, and B2 is 0.4H.

Furthermore, the contraction section comprises a top inclined plate rounding R1 and a side inclined plate rounding R2, wherein R1 is 2000mm, and R2 is 0.75R 1-1R 1.

The utility model has the advantages that:

1. the utility model belongs to a part of an air inlet system and provides a new design scheme for the contraction section structure of an air inlet pipeline of a lower air inlet gas turbine;

2. the utility model is suitable for a heavy gas turbine mass-flow air intake requirement according to the different structures of turning over the section, no matter go up air inlet still down the air inlet all can satisfy the designing requirement. Through three-dimensional calculation, stable transition of airflow can be guaranteed, and lower pressure loss is guaranteed.

3. The utility model discloses a module mosaic structure, it is all more convenient in transportation and equipment, and the plate adopts the same size, has very strong interchangeability. In the aspect of strength, the structure spliced by the modules is greatly improved compared with the structural stability of the whole plate surface.

Drawings

FIG. 1 is a schematic view of an air inlet pattern for a heavy duty gas turbine;

FIG. 2 is a view of a constriction section of the air induction system;

FIG. 3 is a top view of a convergent section of the air induction system;

FIG. 1 shows an intake front section 1; 2 is a contraction section; 3 is a turning section; 4, a gas compressor;

in fig. 2 and 3, alpha is an included angle of a top inclined plane of the contraction section, beta is an overlook included angle, and theta is a rounding included angle;

h is the total height of the air inlet contraction section structure, H1 is the height above the head of the contraction section, and B1 is the width of the head of the contraction section; h2 is the tail height of the contraction section, B is the tail width of the contraction section, R1 is the rounding of the top inclined plate, and R2 is the rounding of the side inclined plate.

Detailed Description

The specific implementation mode is as follows: a contraction section applied to an air inlet system of a heavy-duty gas turbine is shown in a layout view, a structure is shown in a figure 2, a top view is shown in a figure 3, and the contraction section is located between an air inlet front section and a turning section and is suitable for the gas turbine in a lower air inlet mode. Because the cross-sectional dimension change greatly between the anterior segment of admitting air and the turn-back section, consequently design certain angle on the shrink section, the chamfer that adopts certain radius between inclined plane and the straight face passes through, reduces because the too big problem of pressure loss that leads to of cross-sectional dimension change.

Preferably, the total height H is 15000 to 18000mm, the tail height H2 of the contraction section is 0.4H, H1 is 0.1H, B2 is 0.4H, and B1 is H.

Preferably, as shown in fig. 2, the top slope angle α is 35 ° ± 5 °, the top view β is 40 ° ± 5 °, and the rounded included angle θ is 55 ° ± 5 °.

Preferably, the top sloping plate rounding R1 is 2000mm, and R2 is 0.75R 1-1R 1.

The contraction section adopts a module splicing structure, different plates with the same size are selected and spliced into a whole through a connecting piece.

In order to ensure reasonable layout of all parts, if other devices are placed in the contraction section, the distance between the device and the end wall of the contraction section is required to be not less than 500 mm.

The utility model is suitable for a heavy gas turbine mass-flow requirement of admitting air according to the different structures of inflection section, admits air and lower inlet structure in the design to can guarantee the air current steady transition through three-dimensional calculation, guarantee lower loss of pressure

The present embodiment is only an exemplary illustration of the present invention, and does not limit the protection scope thereof, and those skilled in the art can also partially change the present embodiment, and all that is not beyond the spirit of the present invention is within the protection scope of the present invention.

Claims (3)

1. The utility model provides a heavy gas turbine's shrink section structure that admits air which characterized in that: the structure comprises an air inlet front section, a contraction section, a turning section and a compressor, wherein the contraction section comprises a contraction section head part and a contraction section tail part;

the air inlet front section, the contraction section head, the contraction section tail, the turning section and the air compressor are sequentially connected along the main air flow direction;

the contraction section is designed with a certain angle, the inclined plane and the straight plane are in radius transition with a certain radius, the angle alpha of the inclined plane at the top of the contraction section is 35 degrees +/-5 degrees, the angle beta of the inclined plane at the top of the contraction section is 40 degrees +/-5 degrees, and the included angle theta of the radius is 55 degrees +/-5 degrees.

2. The intake convergent section structure of a heavy duty gas turbine according to claim 1, wherein: the total height of the air inlet contraction section structure of the heavy-duty gas turbine is H, the range is 15000-18000 mm, H1 is arranged above the head of the contraction section, wherein H1 is 0.1H, the height of the head of the contraction section is H-H1, the width of the head of the contraction section is B1, and B1 is H;

the tail height of the constriction segment is H2, H2 is 0.4H, the tail width of the constriction segment is B, and B2 is 0.4H.

3. The intake convergent section structure of a heavy duty gas turbine according to claim 2, wherein: the contraction section comprises a top inclined plate rounding R1 and a side inclined plate rounding R2, wherein R1 is 2000mm, and R2 is 0.75R 1-1R 1.

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