CN217206582U

CN217206582U - Turbine blade, gas turbine and gas turbine

Info

Publication number: CN217206582U
Application number: CN202220830359.1U
Authority: CN
Inventors: 张玉宁
Original assignee: China United Heavy Gas Turbine Technology Co Ltd
Current assignee: China United Heavy Gas Turbine Technology Co Ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-16
Anticipated expiration: 2032-04-11

Abstract

The utility model provides a turbine blade, a gas turbine and a gas turbine, wherein the turbine blade comprises a blade body, a mounting plate and a plurality of heat pipes; the mounting plate is arranged at one end of the blade body in the length direction; the heat pipes are arranged on the mounting plate at intervals and uniformly, at least part of the heat pipes is positioned on one side, away from the blade, of the mounting plate in the length direction of the blade body, the axial direction of the heat pipes is consistent with the length direction of the blade body, one end, away from the blade, of the heat pipes in the length direction of the blade body is closed, and working media for evaporation and heat absorption are filled in the heat pipes. The utility model discloses a turbine blade has long service life's advantage.

Description

Turbine blade, gas turbine and gas turbine

Technical Field

The utility model relates to a gas turbine's technical field specifically relates to a turbine blade, gas turbine and gas turbine.

Background

A turbine blade is one of the important components in a gas turbine, and the turbine blade generally operates at a high temperature, so that a cooling structure needs to be provided on the turbine blade in order to prevent the turbine blade from being damaged by the high temperature, thereby reducing the temperature of the turbine blade. The cooling structure in the related art has poor cooling effect, so that the turbine blade is easy to ablate and damage, and the service life of the turbine stationary blade is shortened.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

To this end, embodiments of the present invention provide a turbine blade having an advantage of long service life.

The utility model discloses turbine blade includes: a blade body; the mounting plate is arranged at one end of the blade body in the length direction; the blade comprises a blade body, a plurality of heat pipes, a plurality of mounting plates, a plurality of heat pipes and a plurality of heat pipes, wherein the plurality of heat pipes are arranged on the mounting plates at intervals and uniformly, at least part of the plurality of heat pipes is positioned on one side, away from the blade, of the mounting plate in the length direction of the blade body, the axial direction of the heat pipes is consistent with the length direction of the blade body, one end, away from the blade, of the heat pipe in the length direction of the blade body is sealed, and the heat pipes are filled with working media for evaporation and heat absorption.

The utility model discloses turbine blade is provided with a plurality of heat pipes, and then has improved the cooling effect of cooling gas to the blade body, makes the blade body be difficult for ablating the damage under high temperature environment, consequently the utility model discloses a turbine blade's long service life.

In some embodiments, the plurality of heat pipes includes at least one first pipe group, one of the first pipe groups includes a plurality of the heat pipes, and a plurality of the heat pipes in one of the first pipe groups are spaced apart in a first direction perpendicular to a length direction of the blade body.

In some embodiments, the first tube group is plural, and a plurality of the first tube groups are arranged at intervals in a second direction perpendicular to the length direction of the blade body and the first direction.

In some embodiments, the blade body includes a surrounding wall and a cavity formed by the surrounding wall, the plurality of heat pipes includes a second pipe group and a third pipe group, the second pipe group includes a plurality of the heat pipes, the heat pipes in the second pipe group are located on a side of the mounting plate away from the blade in a length direction of the blade body, the heat pipes in the third pipe group include a first section located on a side of the mounting plate away from the blade in the length direction of the blade body, and a second section located in the cavity.

In some embodiments, a plurality of the heat pipes are disposed in the cavity, one end of each heat pipe in the axial direction is connected to the surrounding wall, the other end of each heat pipe in the axial direction is closed, the mounting plate includes an inlet and an outlet, and the cavity is communicated with the outside through the inlet and the outlet.

In some embodiments, the turbine blade further comprises a fin having a plurality of through holes through which the heat pipes are inserted.

In some embodiments, the fin is a plurality of fins, and the plurality of fins are arranged at intervals along the length direction of the blade body.

In some embodiments, the outer circumferential profile of the cross-section of the heat pipe is polygonal or circular.

A gas turbine according to an embodiment of the present invention includes a turbine blade according to any of the above embodiments.

The gas turbine of the embodiment of the present invention includes the gas turbine of any of the above embodiments.

Drawings

Fig. 1 is a schematic structural view of a turbine blade according to an embodiment of the invention.

FIG. 2 is a schematic structural view of a turbine blade according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a heat pipe according to an embodiment of the present invention.

Fig. 4 is a peripheral profile view of a cross-section of a heat pipe according to an embodiment of the present invention.

Fig. 5 is a peripheral profile view of a cross-section of a heat pipe according to an embodiment of the present invention.

Fig. 6 is a peripheral profile view of a cross-section of a heat pipe according to an embodiment of the present invention.

Fig. 7 is a peripheral profile view of a cross-section of a heat pipe according to an embodiment of the present invention.

Reference numerals:

a blade body 1; a surrounding wall 11; a cavity 12;

a mounting plate 2; an inlet 21; an outlet 22;

a heat pipe 3; a cylinder 31; an inner cavity 32; an evaporation section 321; a condensing section 322; working medium 33; a first section 34; a second section 35;

cooling the gas 4; high temperature combustion gas 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

A turbine blade according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 3, a turbine blade according to an embodiment of the present invention includes a blade body 1, a mounting plate 2, and a plurality of heat pipes 3.

The mounting plate 2 is provided at one end of the blade body 1 in the longitudinal direction (up-down direction in fig. 1). Specifically, mounting panel 2 sets up in the upper end of blade body 1, and the below of mounting panel 2 is the hot junction, that is to say, the below of mounting panel 2 is the runner of high temperature gas 5, and the top of mounting panel 2 is the cold junction, and the cold junction lets in cooling gas 4 and then cools off blade body 1.

The plurality of heat pipes 3 are arranged on the mounting plate 2 at intervals and uniformly, at least part of the plurality of heat pipes 3 is positioned on one side of the mounting plate 2 far away from the blade in the length direction of the blade body 1 (such as the upper side of the mounting plate 2 in fig. 1), that is, one end of one part of the plurality of heat pipes 3 is positioned on the upper side of the mounting plate 2, the other end of the part of the heat pipes 3 is positioned on the lower side of the mounting plate 2, and the other part of the plurality of heat pipes 3 is arranged on the upper surface of the mounting plate 2; alternatively, a plurality of heat pipes 3 are provided on the upper surface of the mounting plate 2.

As shown in fig. 3, the axial direction of the heat pipe 3 is consistent with the length direction of the blade body 1, one end of the heat pipe 3 away from the blade in the length direction of the blade body 1 (e.g. the upper end of the heat pipe 3 in fig. 1) is closed, the heat pipe 3 is filled with a working medium 33 for absorbing heat by evaporation, and specifically, the heat pipe 3 comprises a cylinder 31 and an inner cavity 32 defined by the cylinder 31, wherein the inner cavity 32 is filled with the working medium 33, and the inner cavity comprises an evaporation section 321 and a condensation section 322 which are opposite to each other in the up-down direction.

It can be understood that, when the blade body 1 is in the working state, the heat of the high-temperature fuel gas 5 absorbed by the blade body 1 is conducted to the plurality of heat pipes 3 through the mounting plate 2, wherein the liquid working medium 33 in the evaporation section 321 of the heat pipes 3 can evaporate and absorb the heat, and after the working medium 33 is evaporated into the gaseous state, the heat of the blade body 1 can be transferred to the gaseous working medium 33 after evaporation in the form of latent heat, so that further heat exchange is performed between the blade body 1 and the plurality of heat pipes 3, the gaseous working medium 33 after evaporation is condensed in the condensation section 322 of the heat pipes 3 and releases the latent heat, so that the cooling gas 4 and the heat pipes 3 can absorb more heat of the blade body 1 after heat exchange, and therefore, the cooling effect of the cooling gas 4 on the blade body 1 is improved.

The utility model discloses turbine blade is provided with a plurality of heat pipes 3, and then has improved cooling gas 4 to the cooling effect of blade body 1, makes blade body 1 difficult ablation damage under high temperature environment, consequently the utility model discloses turbine blade's long service life.

Therefore, the turbine blade provided by the embodiment of the utility model has long service life's advantage.

In some embodiments, as shown in fig. 1, the plurality of heat pipes 3 includes at least one first pipe group, one first pipe group includes a plurality of heat pipes 3, and the plurality of heat pipes 3 in one first pipe group are spaced along a first direction (e.g., a front-back direction in fig. 1), which is perpendicular to a length direction of the blade body 1.

It can be understood that, the mounting plate 2 is provided with the plurality of heat pipes 3 in the front-rear direction, so that any part of the mounting plate 2 in the width direction can be sufficiently and uniformly cooled, and further, the blade body 1 can be sufficiently and uniformly cooled in the width direction, and therefore, the cooling effect is improved.

Further, the first pipe group is a plurality of first pipe groups, and the plurality of first pipe groups are arranged at intervals along a second direction (such as a left-right direction in fig. 1), and the second direction is perpendicular to the length direction of the blade body 1 and the first direction, that is, the plurality of heat pipes 3 are arranged in an array on the mounting plate 2.

It can be understood that mounting panel 2 sets up a plurality of first nest of tubes in the left and right directions, and each in a plurality of first nest of tubes all includes a plurality of heat pipes 3, makes a plurality of heat pipes 3 be array arrangement on mounting panel 2, and then arbitrary part on mounting panel 2 all can receive abundant and even cooling, has guaranteed that blade body 1 can receive abundant and even cooling, has consequently improved the cooling effect.

In addition, evenly set up a plurality of first nest of tubes on mounting panel 2, increased heat radiating area, further improved the cooling effect.

In some embodiments, as shown in fig. 2, the blade body 1 comprises a surrounding wall 11 and a cavity 12 formed by the surrounding wall 11, the plurality of heat pipes 3 comprises a second pipe group and a third pipe group, the second pipe group comprises the plurality of heat pipes 3, the heat pipes 3 in the second pipe group are positioned on the side of the mounting plate 2 away from the blade in the length direction of the blade body 1, the heat pipes 3 in the third pipe group comprise a first section 34 and a second section 35, the first section 34 is positioned on the side of the mounting plate 2 away from the blade in the length direction of the blade body 1, that is, the first section 34 of the heat pipes 3 in the second pipe group is positioned below the mounting plate 2, and the second section 35 of the heat pipes 3 in the second pipe group is positioned in the cavity 12.

Specifically, the region of the mounting plate 2 corresponding to the cavity 12 of the blade body 1 in the up-down direction is a first region, the other regions of the mounting plate 2 are second regions, each of the heat pipes 3 in the second tube group is disposed in the second region of the mounting plate 2, and each of the heat pipes 3 in the third tube group is disposed in the first region of the mounting plate 2.

It can be understood that, when the blade body 1 is in a high temperature environment, the blade body 1 conducts heat to the cavity 12 of the blade body 1, so that the temperature in the cavity 12 rises, the second section 35 of the heat pipe 3 in the third pipe group is arranged in the cavity 12, and then the heat pipe 3 can directly absorb the heat in the cavity 12, so that the heat exchange efficiency of the heat pipe 3 is improved, and the cooling effect is improved.

In some embodiments, as shown in fig. 2, a plurality of heat pipes 3 are disposed in the cavity 12, one end of each heat pipe 3 in the axial direction thereof is connected to the surrounding wall 11, and the other end of each heat pipe 3 in the axial direction thereof is closed, specifically, the plurality of heat pipes 3 are disposed in an array on the surrounding wall 11 of the blade body 1, and one end of the cylinder 31 of each of the plurality of heat pipes 3 is connected to the inner wall surface of the surrounding wall 11 of the blade body 1.

Including import 21 and export 22 on the mounting panel 2, cavity 12 communicates with the external world through import 21 and export 22, specifically, in cooling gas 4 can get into cavity 12 through import 21 on the mounting panel 2, make cooling gas 4 can be direct with blade body 1 the leg 11 and the heat pipe 3 on the leg 11 carry out the heat transfer, discharge from export 22 after the cooling gas 4 heat transfers, and then improved the cooling effect.

In some embodiments, the turbine blade of the embodiment of the present invention further includes a fin having a plurality of through holes, through which the heat pipes 3 are inserted, that is, the fin is provided with a plurality of through holes at intervals in the length direction thereof, wherein the plurality of through holes correspond to the heat pipes 3 of the first pipe group one to one, and the plurality of fins are provided on each of the plurality of first pipe groups; or, a plurality of through holes on the fins are arranged in an array form, and the plurality of through holes correspond to the plurality of through holes on the mounting plate 2 one by one.

Optionally, a plurality of through-holes on the fin are arranged in an array, and a plurality of through-holes correspond to a plurality of through-holes on the mounting panel 2 one-to-one, wherein the fin is a plurality of, and a plurality of fins set up along the length direction interval of blade body 1, specifically, are parallel to each other and are parallel to the upper surface of mounting panel 2 between a plurality of fins.

It can be understood that, a plurality of fins are arranged on the heat pipe 3, so that the heat absorbed by the heat pipe 3 can be conducted to the plurality of fins, and the heat dissipation area is increased, in other words, the outer peripheral surface of the adjacent heat pipe 3 and the upper surface of the mounting plate 2 define a cold air channel, and the plurality of fins are arranged on the heat pipe 3, so that the cooling air 4 exchanges heat with the heat pipe 3 and the fins when passing through the cooling channel, and further the cooling effect is improved.

In addition, a plurality of fins that are parallel to each other have the guide effect to cooling gas 4 in the air conditioning passageway, have strengthened the convection effect of cooling gas 4 in the air conditioning passageway, make cooling gas 4 after the heat transfer discharge the external world fast in can the air conditioning passageway, and then strengthened the cooling effect.

In some embodiments, as shown in fig. 4-7, the outer perimeter profile of the cross-section of the heat pipe 3 is polygonal or circular, that is, the heat pipe 3 is a multi-sided cylinder or cylinder.

Specifically, as shown in fig. 4 to 6, the outer peripheral profile of the cross section of the heat pipe 3 is a polygon, for example, the outer peripheral profile of the cross section of the heat pipe 3 is a regular hexagon, a regular triangle, or an isosceles trapezoid; as shown in fig. 7, the outer circumferential profile of the cross section of the heat pipe 3 is circular.

Alternatively, the heat pipe 3 may have a circular cross-sectional outer contour and the heat pipe 3 may be a cylinder, and it will be understood that the cooling gas 4 will form a turbulent flow at the trailing edge of the heat pipe 3 after passing through the heat pipe 3, so that the cooling gas 4 can exchange heat with the heat pipe 3 and the mounting plate 2 in this area sufficiently, thereby improving the cooling effect.

The utility model discloses gas turbine includes the gas turbine of any above-mentioned embodiment, specifically, the utility model discloses gas turbine of embodiment still includes gas compressor and combustion chamber. The compressor continuously compresses external air, inputs the compressed air into the combustion chamber, mixes and burns the compressed air and fuel in the combustion chamber to form high-temperature gas, and then flows into the gas turbine to expand and do work, and pushes the turbine blades to rotate and output mechanical work.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A turbine blade, comprising:

a blade body;

the mounting plate is arranged at one end of the blade body in the length direction;

the heat pipes are arranged on the mounting plate at intervals and uniformly, at least part of the heat pipes is positioned on one side, away from the blade, of the mounting plate in the length direction of the blade body, the axial direction of each heat pipe is consistent with the length direction of the blade body, one end, away from the blade, of each heat pipe in the length direction of the blade body is sealed, and working media for evaporation and heat absorption are filled in each heat pipe.

2. The turbine blade of claim 1 wherein said plurality of heat pipes comprises at least a first group of pipes, one of said first group of pipes comprising a plurality of said heat pipes, a plurality of said heat pipes of one of said first group of pipes being spaced apart in a first direction, said first direction being perpendicular to a length direction of said blade body.

3. The turbine blade as in claim 2, wherein the first tube group is plural, and a plurality of the first tube groups are arranged at intervals in a second direction, the second direction being perpendicular to the length direction of the blade body and the first direction.

4. A turbine blade according to claim 1 wherein the blade body comprises a surrounding wall and a cavity formed by the surrounding wall,

the plurality of heat pipes include a second pipe group and a third pipe group, the second pipe group includes a plurality of the heat pipes, the third pipe group includes a plurality of the heat pipes, in the second pipe group the heat pipe is located the mounting panel is in one side of keeping away from the blade in the length direction of blade body, in the third pipe group the heat pipe includes first section and second section, first section is located the mounting panel is in one side of keeping away from the blade in the length direction of blade body, the second section is located in the cavity.

5. A turbine blade according to claim 4 wherein a plurality of said heat pipes are provided in said cavity, said heat pipes being connected at one axial end thereof to said surrounding wall and being closed at the other axial end thereof,

the mounting plate comprises an inlet and an outlet, and the cavity is communicated with the outside through the inlet and the outlet.

6. The turbine blade of claim 1 further comprising a fin having a plurality of through holes, said heat pipe being disposed through said through holes.

7. A turbine blade according to claim 6 wherein the number of fins is plural, and plural fins are provided at intervals along the length of the blade body.

8. A turbine blade according to claim 1 wherein the heat pipe has a cross-sectional outer circumferential profile which is polygonal or circular.

9. A gas turbine comprising a turbine blade according to any one of claims 1 to 8.

10. A gas turbine comprising the gas turbine of claim 9.