Adjustable stator blades and turbines

Abstract

The present invention discloses an adjustable stator blade and a turbine. The adjustable stator blade includes an inner ring, an outer ring, a stator blade, a sleeve, a connecting rod assembly, and a rotating mechanism. One end of the stator blade is disposed on the inner ring, and the other end of the stator blade is disposed on the outer ring. The sleeve is disposed between and connected to the stator blade and the connecting rod assembly, and the connecting rod assembly connects the sleeve to the rotating mechanism. The adjustable stator blade of the present invention changes the inlet and outlet airflow angles of the stator blade by adjusting the installation angle of the stator blade. By converting the stator blade into an adjustable stator blade structure, the efficiency of the turbine under partial load conditions is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbine manufacturing, and more particularly, to an adjustable stator blade and a turbine having the adjustable stator blade. Background Art

[0002] In the related art, the stationary blades in a turbine are usually fixedly arranged inside the turbine, resulting in a fixed inlet and outlet airflow angle of the stationary blades, which reduces the efficiency of the turbine under partial load conditions. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of one aspect of the present invention proposes an adjustable stator blade, which changes the inlet and outlet airflow angles of the stator blade by adjusting the installation angle of the stator blade, and improves the efficiency of the turbine under partial load conditions by changing the stator blade into an adjustable guide vane structure.

[0005] Another embodiment of the present invention provides a turbine having the adjustable stator blade.

[0006] According to an embodiment of the first aspect of the present invention, the adjustable stator blade includes: an inner ring and an outer ring; a stator blade, one end of the stator blade is arranged on the inner ring, and the other end of the stator blade is arranged on the outer ring; a sleeve, the sleeve is arranged on the stator blade and connected to the stator blade; a connecting rod assembly and a rotating mechanism, the connecting rod assembly connects the sleeve and the rotating mechanism.

[0007] According to the adjustable stator blades of an embodiment of the present invention, the stator blades are arranged between the inner ring and the outer ring, and the stator blades can rotate between the inner ring and the outer ring along their axes, wherein the rotating mechanism drives the connecting rod assembly to rotate, and the connecting rod assembly drives the sleeve to rotate around its axis, and the sleeve is coaxially arranged with the stator blades. Therefore, the adjustable stator blades change the inlet and outlet airflow angles of the stator blades by adjusting the installation angle of the stator blades. By changing the stator blades into an adjustable stator blade structure, the efficiency of the turbine under partial load conditions is improved.

[0008] In some embodiments, a first through hole is provided on the outer ring, and the sleeve is passed through the first through hole.

[0009] In some embodiments, the sleeve includes a first sub-sleeve and a second sub-sleeve connected to each other, the first sub-sleeve is provided on the stationary blade and connected to the stationary blade, the second sub-sleeve is passed through the first through hole, and the second sub-sleeve is connected to the connecting rod assembly.

[0010] In some embodiments, a first mounting groove and a second mounting groove are provided on the inner ring, and one end of the stationary blade has a first mounting portion and a second mounting portion, the first mounting portion is rotatably provided in the first mounting groove, and the second mounting portion is rotatably provided in the second mounting groove.

[0011] In some embodiments, a third mounting groove and a fourth mounting groove are provided on the outer ring, and the other end of the stationary blade has a third mounting portion and a fourth mounting portion, the third mounting portion is rotatably provided in the third mounting groove, and the fourth mounting portion is rotatably provided in the fourth mounting groove.

[0012] In some embodiments, the adjustable stationary blade further includes a plurality of gaskets, and the plurality of gaskets are respectively arranged in the first mounting groove, the second mounting groove, the third mounting groove and the fourth mounting groove.

[0013] In some embodiments, the connecting rod assembly includes a first rod and a rotating shaft, the rotating shaft is provided on the rotating mechanism, one end of the first rod is connected to the rotating shaft, and the other end of the first rod is connected to the sleeve.

[0014] In some embodiments, a second through hole is provided on the first rod, and the sleeve is provided in the second through hole and connected to the first rod.

[0015] In some embodiments, the connecting rod assembly further includes a second rod, the rotating shaft includes a first shaft and a second shaft, one end of the first rod is connected to the first shaft, the first shaft and the second shaft are connected through the second rod, and the second shaft is provided on the rotating mechanism.

[0016] The turbine according to an embodiment of the second aspect of the present invention includes the adjustable stator blades described in any embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of an adjustable stator blade according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] Adjustable stator blade 100, inner ring 1, first mounting groove 11, second mounting groove 12, outer ring 2, first through hole 21, third mounting groove 22, fourth mounting groove 23, stator blade 3, first mounting portion 31, second mounting portion 32, third mounting portion 33, fourth mounting portion 34, sleeve 4, first sub-cylinder 41, second sub-cylinder 42, connecting rod assembly 5, first rod 51, rotating shaft 52, first shaft 53, second shaft 54, second rod 55, second through hole 56, rotating mechanism 6. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] like Figure 1 As shown, the adjustable stator blade 100 according to an embodiment of the present invention includes an inner ring 1 , an outer ring 2 , stator blades 3 , a sleeve 4 , a connecting rod assembly 5 and a rotating mechanism 6 .

[0022] One end of the stationary blade 3 is rotatably disposed on the inner ring 1 , and the other end of the stationary blade 3 is rotatably disposed on the outer ring 2 . The sleeve 4 is disposed inside the stationary blade 3 and connected to the stationary blade 3 . The connecting rod assembly 5 connects the sleeve 4 and the rotating mechanism 6 .

[0023] Specifically, if Figure 1 As shown, the adjustable stator blades 100 are arranged in a vertical direction. The lower ends of the stator blades 3 are rotatably mounted on the inner ring 1, and the upper ends of the stator blades 3 are rotatably mounted on the inner ring 2. The lower end of the sleeve 4 is disposed within the stator blade 3 and fixedly connected to the stator blade 3. The upper end of the sleeve 4 is connected to the connecting rod assembly 5, which is ultimately connected to the rotating mechanism 6. Thus, the rotating mechanism 6 drives the connecting rod assembly 5 to rotate, the connecting rod assembly 5 drives the sleeve 4 to rotate, and the sleeve 4 can drive the stator blade 3 to rotate.

[0024] According to the adjustable stator blade 100 of an embodiment of the present invention, the stator blade 3 is arranged between the inner ring 1 and the outer ring 2, and the stator blade 3 can rotate between the inner ring 1 and the outer ring 2 along its axis, wherein the rotating mechanism 6 drives the connecting rod assembly 5 to rotate, and the connecting rod assembly 5 drives the sleeve 4 to rotate around its axis, and the sleeve 4 is coaxially arranged with the stator blade 3. Therefore, the adjustable stator blade 100 changes the inlet and outlet airflow angles of the stator blade 3 by adjusting the installation angle of the stator blade 3. By changing the stator blade 3 to an adjustable stator blade structure, the efficiency of the adjustable stator blade 100 under partial load conditions is improved.

[0025] In some embodiments, as Figure 1 As shown, a first through hole 21 is provided on the outer ring 2 , and the sleeve 4 is passed through the first through hole 21 .

[0026] It can be understood that the outer ring 2 is arranged at the upper end of the static blade 3, and a first through hole 21 is provided on the outer ring 2, which penetrates the turbine cover 2 along its thickness direction. The sleeve 4 passes through the first through hole 21, thereby facilitating the sleeve 4 to connect the static blade 3 and the connecting rod assembly 5.

[0027] In some embodiments, as Figure 1 As shown, the sleeve 4 includes a first sub-cylinder 41 and a second sub-cylinder 42 connected to each other. The first sub-cylinder 41 is arranged in the stationary blade 3 and connected to the stationary blade 3. The second sub-cylinder 42 is passed through the first through hole 21 and connected to the connecting rod assembly 5.

[0028] It can be understood that the first sub-cylinder 41 and the second sub-cylinder 42 are detachably connected, and the first sub-cylinder 41 is arranged in the static blade 3 and is connected to the static blade 3. Preferably, the first sub-cylinder 41 can be integrally formed with the static blade 3, thereby effectively improving the stability between the first sub-cylinder 41 and the static blade 3.

[0029] The second sub-tube 42 is inserted into the first through hole 21 and is detachably connected to the first sub-tube 41 , which is convenient for disassembly and maintenance of the adjustable stationary blade 100 .

[0030] In some embodiments, as Figure 1 As shown, a first mounting groove 11 and a second mounting groove 12 are provided on the inner ring 1, and one end of the stationary blade 3 has a first mounting portion 31 and a second mounting portion 32. The first mounting portion 31 is rotatably disposed in the first mounting groove 11, and the second mounting portion 32 is rotatably disposed in the second mounting groove 12.

[0031] It can be understood that by providing the first mounting groove 11 and the second mounting groove 12 , the possibility of rotation between the stationary blade 3 and the inner ring 1 is effectively improved.

[0032] In some embodiments, as Figure 1 As shown, a third mounting groove 22 and a fourth mounting groove 23 are provided on the outer ring 2, and the other end of the stationary blade 3 has a third mounting portion 33 and a fourth mounting portion 34. The third mounting portion 33 is rotatably provided in the third mounting groove 22, and the fourth mounting portion 34 is rotatably provided in the fourth mounting groove 23.

[0033] It can be understood that, by providing the third mounting groove 22 and the fourth mounting groove 23 , the possibility of rotation between the stationary blade 3 and the outer ring 2 is effectively improved.

[0034] In some embodiments, the adjustable stator blade 100 further includes a plurality of gaskets (not shown), which are respectively disposed in the first mounting groove 11 , the second mounting groove 12 , the third mounting groove 22 and the fourth mounting groove 23 .

[0035] It can be understood that by providing the gasket, direct contact between the stationary blades 3 and the inner rings 1 and 2 is avoided, thereby effectively extending the service life of the stationary blades 3.

[0036] In some embodiments, as Figure 1 As shown, the connecting rod assembly 5 includes a first rod 51 and a rotating shaft 52 . The rotating shaft 52 is provided on the rotating mechanism 6 . One end of the first rod 51 is connected to the rotating shaft 52 , and the other end of the first rod 51 is connected to the sleeve 4 .

[0037] Specifically, if Figure 1As shown, the rotating mechanism 6 can drive the rotating shaft 52 to rotate, and the rotating shaft 52 can drive the first rod 51 to rotate around the axis of the sleeve 4, and then the rotating shaft 52 can drive the sleeve 4 to rotate.

[0038] In some embodiments, as Figure 1 As shown, a second through hole 56 is provided on the first rod 51 , and the sleeve 4 is disposed in the second through hole 56 and connected to the first rod 51 .

[0039] It can be understood that by providing the second through hole 56 and fixing the upper end of the second sub-tube 42 in the second through hole 56 , the stability of the adjustable stator blade 100 is further improved.

[0040] In some embodiments, as Figure 1 As shown, the connecting rod assembly 5 also includes a second rod 55, the rotating shaft 52 includes a first shaft 53 and a second shaft 54, one end of the first rod 51 is connected to the first shaft 53, the first shaft 53 and the second shaft 54 are connected through the second rod 55, and the second shaft 54 is provided on the rotating mechanism 6.

[0041] It can be understood that the transmission effect of the connecting rod assembly 5 is effectively improved by sequentially transmitting through the second shaft 54 , the second rod 55 , the first shaft 53 and the first rod 51 .

[0042] A turbine according to an embodiment of the present invention includes the adjustable stator blades 100 of any of the above-described embodiments. The adjustable stator blades 100 change the inlet and outlet airflow angles of the stator blades 3 by adjusting the installation angle of the stator blades 3. By converting the stator blades 3 into adjustable guide vanes, the efficiency of the turbine 100 under partial load conditions is improved.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. 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, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An adjustable stator blade, characterized in that: include: Inner and outer rings; a stationary blade, one end of the stationary blade being arranged on the inner ring, and the other end of the stationary blade being arranged on the outer ring; a sleeve, the sleeve being provided on the stationary blade and connected to the stationary blade; a connecting rod assembly and a rotating mechanism, wherein the connecting rod assembly connects the sleeve and the rotating mechanism; The inner ring is provided with a first mounting groove and a second mounting groove, and one end of the stationary blade has a first mounting portion and a second mounting portion, the first mounting portion is rotatably provided on the first mounting groove, and the second mounting portion is rotatably provided on the second mounting groove; The outer ring is provided with a third mounting groove and a fourth mounting groove, and the other end of the stationary blade has a third mounting portion and a fourth mounting portion, the third mounting portion is rotatably provided on the third mounting groove, and the fourth mounting portion is rotatably provided on the fourth mounting groove; The outer ring is provided with a first through hole, and the sleeve is inserted into the first through hole; The sleeve includes a first sub-tube and a second sub-tube connected to each other, the first sub-tube is provided on the stationary blade and connected to the stationary blade, the second sub-tube is passed through the first through hole, and the second sub-tube is connected to the connecting rod assembly; The stationary blades are arranged in the turbine.

2. The adjustable stator blade according to claim 1, characterized in that: It also includes a plurality of gaskets, which are respectively arranged in the first mounting groove, the second mounting groove, the third mounting groove and the fourth mounting groove.

3. The adjustable stator blade according to claim 1, characterized in that: The connecting rod assembly includes a first rod and a rotating shaft. The rotating shaft is arranged on the rotating mechanism. One end of the first rod is connected to the rotating shaft, and the other end of the first rod is connected to the sleeve.

4. The adjustable stator blade according to claim 3, characterized in that: A second through hole is provided on the first rod, and the sleeve is provided in the second through hole and connected to the first rod.

5. The adjustable stator blade according to claim 4, characterized in that: The connecting rod assembly also includes a second rod, the rotating shaft includes a first shaft and a second shaft, one end of the first rod is connected to the first shaft, the first shaft and the second shaft are connected through the second rod, and the second shaft is provided on the rotating mechanism.

6. A turbine characterized by: The invention comprises an adjustable stator blade according to any one of claims 1 to 5.

Images