Blade, turbine, and gas turbine

Abstract

The utility model relates to a movable blade, a turbine and a gas turbine. The movable blade comprises a body and a plurality of partition plates, the body is provided with a suction surface and a pressure surface, a first air inlet is formed in the blade root side of the body, a cavity where the partition plates are located is divided into a plurality of cavities, and the cavity communicated with the first air inlet is a first cavity. The first cavity is sequentially communicated with the multiple cavities, facing the front edge side, of the first cavity to form a first S-shaped channel, the first cavity is sequentially communicated with the multiple cavities, facing the rear edge side, of the first cavity to form a second S-shaped channel, and the partition plate and the pressure face define the cavity with the airflow flowing from the blade root side to the blade top side. The partition plate and the suction face define a cavity with the airflow flowing from the blade top side to the blade root side. According to the moving blade, the heat exchange coefficients of cooling airflow on the pressure surface and the suction surface are respectively enhanced, the cooling uniformity of the cooling airflow on the pressure surface and the suction surface of the body is improved, and the cooling effect of the cooling airflow on the pressure surface and the suction surface is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas turbine technical field, concretely relates to a moving blade, turbine and gas turbine. BACKGROUND

[0002] The turbine high-temperature blade of gas turbine generally adopts multi-pass serpentine channel to cool the inside of the blade, especially the moving blade. In the middle region of the blade, the cooling gas enters the blade from the blade root, and the cooling gas flows through the serpentine channel to cool the blade. The inside of the serpentine channel is usually arranged with ribs and other disturbing structures to enhance the heat exchange effect. However, each (pass) channel of the serpentine channel is usually rectangular in shape, that is, a rectangular shape composed of a pressure surface, a suction surface and two side surfaces. When the moving blade rotates, under the influence of the Coriolis force, when the cooling gas flows from the blade root to the blade tip, the heat exchange coefficient of the pressure surface (the blade root side) of the blade is enhanced, and the heat exchange coefficient of the suction surface (the blade tip side) is weakened. When the cooling gas flows from the blade tip to the blade root, the heat exchange coefficient of the pressure surface is weakened, and the heat exchange coefficient of the suction surface is enhanced. This phenomenon makes the blade cooling effect uneven. SUMMARY

[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent.

[0004] Therefore, the embodiment of the utility model puts forward a moving blade, which enhances the heat exchange coefficients of the cooling gas flow on the pressure surface and the suction surface respectively, improves the uniformity of the cooling of the cooling gas flow on the pressure surface and the suction surface of the body, and also improves the cooling effect of the cooling gas flow on the pressure surface and the suction surface.

[0005] The embodiment of the utility model puts forward a turbine.

[0006] The embodiment of the utility model puts forward a gas turbine.

[0007] According to the moving blade, the pressure surface and the suction surface are separated in different cavities by arranging the partition plates, and a serpentine channel is formed, the heat exchange coefficient of the cooling airflow on the pressure surface and the suction surface is respectively enhanced by utilizing the Coriolis force effect, the uniformity of the cooling of the pressure surface and the suction surface of the body by the cooling airflow is improved, and the cooling effect of the pressure surface and the suction surface by the cooling airflow is also improved.

[0008] According to the moving blade, the pressure surface and the suction surface are separated in different cavities by arranging the partition plates, and a serpentine channel is formed, the heat exchange coefficient of the cooling airflow on the pressure surface and the suction surface is respectively enhanced by utilizing the Coriolis force effect, the uniformity of the cooling of the pressure surface and the suction surface of the body by the cooling airflow is improved, and the cooling effect of the pressure surface and the suction surface by the cooling airflow is also improved.

[0009] In some embodiments, the first air inlet is located at one side of the middle part of the body adjacent to the leading edge of the body.

[0010] In some embodiments, the plurality of cavities sequentially communicated with the first cavity and located at the trailing edge side of the first cavity are all triangular cavities.

[0011] In some embodiments, the plurality of cavities sequentially communicated with the first cavity and located at the trailing edge side of the first cavity are six, and the six cavities are sequentially the second cavity to the seventh cavity.

[0012] In some embodiments, the first serpentine channel comprises the first cavity, an eighth cavity and a ninth cavity sequentially communicated, and the ninth cavity has a plurality of first air film holes and / or second air film holes.

[0013] In some embodiments, the end of one of the partitions is located at the middle or near the middle of the other partition.

[0014] In some embodiments, the partition at the end of the second serpentine passage and the inner wall surface of the body define a tenth chamber, the body is provided with a second air inlet at the blade root side of the tenth chamber, and the body is provided with a cooling hole at the trailing edge, the second air inlet and the cooling hole both communicate with the tenth chamber.

[0015] In some embodiments, the blade further comprises a plurality of column ribs, the plurality of column ribs are arranged in the tenth chamber, the plurality of column ribs are arranged at intervals, and the plurality of column ribs are adjacent to the cooling hole, and the cooling hole is arranged at intervals along the blade root side to the blade tip side.

[0016] The turbine of the embodiment of the utility model comprises the blade.

[0017] Therefore, the turbine of the embodiment of the utility model uniformly and effectively cools the suction surface and the pressure surface of the blade.

[0018] The gas turbine of the embodiment of the utility model comprises the blade of any one of the embodiments or the turbine of any one of the embodiments.

[0019] The gas turbine of the embodiment of the utility model effectively cools the blade. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the blade of the embodiment of the utility model;

[0021] Figure 2 is Figure 1 the A direction schematic view (not all the partitions are shown) of the embodiment of the utility model;

[0022] Reference signs:

[0023] 100, blade;

[0024] 1, body, 11, suction surface, 12, pressure surface, 13, first gas film hole, 14, second gas film hole, 15, cooling hole, 16, blade root side, 17, blade tip side;

[0025] 2, partition;

[0026] 31, first chamber, 32, second chamber, 33, third chamber, 34, fourth chamber, 35, fifth chamber, 36, sixth chamber, 37, seventh chamber, 38, eighth chamber, 39, ninth chamber, 310, tenth chamber;

[0027] 4, column rib. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail, examples of which are shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] Reference is made below to the drawings Figure 1 And Figure 2 The moving blade 100, the turbine and the gas turbine of the embodiments of the present application are described in detail.

[0030] As shown in Figure 1 And Figure 2 The moving blade 100 of the embodiments of the present application comprises a body 1 and a plurality of partitions 2.

[0031] The body 1 has a cavity, the body 1 has a suction surface 11 and a pressure surface 12, the body 1 is provided with a first gas film hole 13 at the suction surface 11, the body 1 is provided with a second gas film hole 14 at the pressure surface 12, the first gas film hole 13 and the second gas film hole 14 are both communicated with the cavity, the body 1 has a blade root side 16 and a blade tip side 17, the body 1 is provided with a first air inlet at the blade root side 16, and the first air inlet is communicated with the cavity. The plurality of partitions 2 are arranged in the cavity of the body 1, and the plurality of partitions 2 divide the cavity into a plurality of chambers, wherein the chamber communicated with the first air inlet is a first chamber 31, the first chamber 31 is communicated with a plurality of chambers located on the front edge side thereof in sequence to form a first serpentine passage, and the first chamber 31 is communicated with a plurality of chambers located on the rear edge side of the first chamber 31 in sequence to form a second serpentine passage. Among them, the partition 2 and the pressure surface 12 define a chamber with airflow direction from the blade root side 16 to the blade tip side 17, the partition 2 and the suction surface 11 define a chamber with airflow direction from the blade tip side 17 to the blade root side 16, and the chambers located at the ends of the first serpentine passage and the second serpentine passage both have gas film holes (the first gas film hole 13 and / or the second gas film hole 14). Then, the chamber with airflow direction from the blade root side 16 to the blade tip side 17 corresponds to the pressure surface 12 of the body 1, and at least part of the chambers have the second gas film hole 14 on the pressure surface 12; the chamber with airflow from the blade tip side 17 to the blade root side 16 corresponds to the suction surface 11 of the body 1, and at least part of the chambers have the first gas film hole 13 on the suction surface 11.

[0032] The cooling airflow enters the first chamber 31 from the first air inlet of the blade root side 16 of the body 1, flows to the blade tip side 17 of the first chamber 31, and is then divided into two streams, one of which flows to the chamber of the first serpentine passage in the direction of the leading edge of the body 1, and the other of which flows to the chamber of the second serpentine passage in the direction of the trailing edge of the body 1.

[0033] In the process of flowing of the cooling airflow in the first serpentine passage and the second serpentine passage, when the cooling airflow flows through the chamber opposite to the pressure surface 12, the airflow flows from the blade root side 16 to the blade tip side 17 of the chamber (for example, the flow of the cooling airflow in the first chamber 31), on the one hand, due to the Coriolis force effect, the heat exchange coefficient of the pressure surface 12 is enhanced, and the heat exchange coefficient of the suction surface 11 is weakened, on the other hand, the chamber is defined by the pressure surface 12 and the partition plate 2, that is, the cooling airflow flowing through the chamber does not directly exchange heat with the suction surface 11 of the body 1, so that the pressure surface 12 corresponding to the chamber is the main heat exchange surface, and the heat exchange coefficient of the chamber in the pressure surface 12 is further enhanced.

[0034] Therefore, the moving blade 100 of the embodiment of the utility model, through arranging the partition plate 2 to separate the pressure surface 12 and the suction surface 11 in different chambers and forming the serpentine passage, the heat exchange coefficient of the cooling airflow in the pressure surface 12 and the suction surface 11 is enhanced respectively by using the Coriolis force effect, the uniformity of the cooling of the cooling airflow to the pressure surface 12 and the suction surface 11 of the body 1 is improved, and the cooling effect of the cooling airflow to the pressure surface 12 and the suction surface 11 is also improved.

[0035] In some embodiments, the first air inlet is located at a middle portion of the body 1 adjacent to one side of the leading edge of the body 1. The first air inlet is adjacent to the leading edge of the blade 100 body 1, which can preferentially cool the leading edge of the body 1, significantly improve the cooling efficiency of the leading edge, and prolong the service life of the blade 100.

[0036] Further, the first serpentine passage includes the first chamber 31, the eighth chamber 38, and the ninth chamber 39 connected in sequence, the ninth chamber 39 is located at the end of the first serpentine passage, and the ninth chamber 39 has a plurality of first film holes 13 and / or second film holes 14. The cooling air flow flows from the tip side 17 of the first chamber 31 to the tip side 17 of the eighth chamber 38, and then flows from the tip side 17 of the eighth chamber 38 to the root side 16, heat exchange is performed on the suction surface 11 in the eighth chamber 38, part of the cooling air is discharged from the first film holes 13 of the eighth chamber 38, and then enters the root side 16 of the ninth chamber 39 from the root side 16 of the eighth chamber 38, and is discharged from the film holes of the ninth chamber 39 after heat exchange in the ninth chamber 39.

[0037] The ninth chamber 39 is provided with a plurality of film holes (a plurality of first film holes 13 and / or second film holes 14), which facilitates more air flow to be discharged from the ninth chamber 39.

[0038] The two partitions 2 and the inner wall surface of the body 1 define the eighth chamber 38 and the ninth chamber 39, wherein the end of one partition 2 is arranged at or adjacent to the middle portion of the other partition 2, so that the volume of the first chamber 31 is maximum, and the volumes of the eighth chamber 38 and the ninth chamber 39 decrease in sequence.

[0039] Further, the plurality of chambers sequentially connected with the first chamber 31 and located at the trailing edge side of the first chamber 31 are all triangular chambers. The chambers are triangular chambers, which not only facilitates the installation and arrangement of the partitions 2 in the cavity of the body 1, but also reduces the flow area occupied by the chambers, thereby increasing the number of chambers of the second serpentine passage, increasing the flow path of the cooling air flow in the second serpentine passage, and further increasing the heat exchange area of the cooling air, thereby further improving the cooling effect.

[0040] Further, the plurality of chambers sequentially connected with the first chamber 31 and located at the trailing edge side of the first chamber 31 are six, which are the second chamber 32 to the seventh chamber 37 in sequence, and the volumes of the second chamber 32 to the seventh chamber 37 decrease in sequence. As Figure 1As shown, the cooling air flows from the tip side 17 of the first chamber 31 to the tip side 17 of the second chamber 32, and then from the tip side 17 of the second chamber 32 to the root side 16 of the second chamber 32, exchanges heat with the suction surface 11 in the second chamber 32, and a part of the cooling air is discharged from the first film hole 13 of the second chamber 32, and then flows from the root side 16 of the second chamber 32 to the root side 16 of the third chamber 33, and then from the root side 16 of the third chamber 33 to the tip side 17 of the third chamber 33, exchanges heat with the pressure surface 12 in the third chamber 33, and a part of the cooling air is discharged from the second film hole 14 of the third chamber 33. Then, the cooling air flows through the fourth chamber 34, the fifth chamber 35, the sixth chamber 36 and the seventh chamber 37 in turn, and a part of the cooling air is discharged from the first film hole 13 of the fourth chamber 34 and the second film hole 14 of the fifth chamber 35, and finally from the second film hole 14 of the seventh chamber 37.

[0041] In some embodiments, the partition plate 2 at the end of the second serpentine channel and the inner wall surface of the body 1 define a tenth chamber 310, the body 1 is provided with a second air inlet at the root side 16 of the tenth chamber 310, and the body 1 is provided with a cooling hole 15 at the trailing edge, and the second air inlet and the cooling hole 15 are in communication with the tenth chamber 310. The cooling air enters the tenth chamber 310 from the second air inlet, cools the trailing edge of the body 1, and is then discharged from the cooling hole 15.

[0042] The moving blade 100 of the embodiment of the utility model further comprises a plurality of column ribs 4, the column ribs 4 are arranged in the tenth chamber 310, the plurality of column ribs 4 are arranged at intervals, the plurality of column ribs 4 are adjacent to the cooling hole 15, and the cooling hole 15 is arranged at intervals along the root side 16 to the tip side 17. Figure 2 As shown, the plurality of column ribs are arranged in two rows, and each row has a plurality of column ribs arranged at intervals. The plurality of column ribs 4 disturb the flow of the cooling air, and the plurality of cooling holes 15 arranged at intervals can form local convection when the cooling air flows through the front ends of the cooling holes 15, thereby increasing the residence time and flow path of the cooling air in the tenth chamber 310, and thereby increasing the heat exchange effect of the cooling air.

[0043] The turbine of the embodiment of the utility model is described below.

[0044] The turbine of the embodiment of the utility model comprises the moving blade 100 of any one of the embodiments.

[0045] Therefore, the turbine of the embodiment of the utility model uniformly cools the suction surface 11 and the pressure surface 12 of the moving blade 100, and has good cooling effect.

[0046] The gas turbine of the embodiment of the utility model is described below.

[0047] The gas turbine of the embodiment of the utility model comprises the moving blade 100 of any one of the embodiments, or the turbine of any one of the embodiments.

[0048] Therefore, the cooling effect of the gas turbine on the moving blade 100 is good.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0053] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific 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 application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the features of different embodiments or examples described in the present application and the features of different embodiments or examples within the scope of the present application without contradiction.

[0054] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A rotor blade (100), characterized in that Comprising: a body (1) having a cavity, the body (1) having a suction surface (11) and a pressure surface (12), the body (1) being provided with first film holes (13) on the suction surface (11), the body (1) being provided with second film holes (14) on the pressure surface (12), the first film holes (13) and the second film holes (14) both communicating with the cavity, the body (1) having a blade root side (16) and a blade tip side (17), the body (1) being provided with a first air inlet on the blade root side (16); a plurality of partitions (2) arranged in the cavity of the body (1), the plurality of partitions (2) separating the cavity into a plurality of chambers, wherein the chamber communicating with the first air inlet is a first chamber (31), the first chamber (31) sequentially communicating with a plurality of chambers located on the front edge side of the first chamber (31) to form a first serpentine passage, and the first chamber (31) sequentially communicating with a plurality of chambers located on the trailing edge side of the first chamber (31) to form a second serpentine passage; wherein the partitions (2) and the pressure surface (12) define the chambers with airflow direction from the blade root side (16) to the blade tip side (17), and the partitions (2) and the suction surface (11) define the chambers with airflow direction from the blade tip side (17) to the blade root side (16).

2. The rotor blade (100) according to claim 1, characterized in that The first air inlet is located at the middle of the body (1) adjacent to one side of the leading edge of the body (1).

3. The rotor blade (100) according to claim 2, characterized in that The plurality of chambers sequentially communicating with the first chamber (31) located on the trailing edge side of the first chamber (31) are all triangular chambers.

4. The rotor blade (100) according to claim 3, characterized in that The chambers sequentially communicating with the first chamber (31) located on the trailing edge side of the first chamber (31) are six, and the six chambers are sequentially the second chamber (32) to the seventh chamber (37).

5. The rotor blade (100) according to claim 2, characterized in that The first serpentine passage includes the first chamber (31), an eighth chamber (38), and a ninth chamber (39) sequentially communicating, and the ninth chamber (39) has a plurality of first film holes (13) and / or second film holes (14).

6. The rotor blade (100) according to claim 5, characterized in that Two partitions (2) and the inner wall surface of the body (1) define the eighth chamber (38) and the ninth chamber (39), wherein the end of one of the partitions (2) is arranged at the middle or adjacent to the middle of the other partition (2).

7. The rotor blade (100) according to claim 1, characterized in that The partition (2) located at the end of the second serpentine passage and the inner wall surface of the body (1) define a tenth chamber (310), the body (1) is provided with a second air inlet on the blade root side (16) of the tenth chamber (310), and the body (1) is provided with a cooling hole (15) on the trailing edge, the second air inlet and the cooling hole (15) both communicating with the tenth chamber (310).

8. The rotor blade (100) according to claim 7, characterized in that Further comprising a plurality of column ribs (4) disposed in the tenth chamber (310), the plurality of column ribs (4) being spaced apart, the plurality of column ribs (4) being adjacent to the cooling holes (15), the cooling holes (15) being spaced apart along the blade root side (16) to the blade tip side (17).

9. A turbine characterized by A blade (100) according to any one of claims 1 to 8.

10. A gas turbine engine characterized by, A turbine according to claim 9 comprising a blade (100) according to any one of claims 1 to 8.

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