Turbines, gas turbines and rotor blade assemblies

Abstract

The present invention provides a turbine, a gas turbine, and a moving blade assembly. The turbine includes a body, a rotating shaft, and a moving blade assembly. The body includes a chamber, a rotating shaft extending through the body, and the rotating shaft is rotatable relative to the body. At least a portion of the rotating shaft is located within the chamber, and the extending direction of the rotating shaft coincides with the extending direction of the body. The moving blade assembly includes a plurality of moving blades located within the chamber. The plurality of moving blades are spaced apart along the circumference of the rotating shaft. The moving blades include a moving blade body, a blade tip, and a blade shroud. The moving blade body is connected to the outer circumferential surface of the rotating shaft. The blade tip is located at an end of the moving blade body away from the rotating shaft. The blade shroud is detachably connected to the blade tip, and the blade tip is adjustable relative to the blade tip in a direction away from the moving blade body. The blade shroud of the turbine moving blade assembly of the present invention has the advantages of being easy to replace and having a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and in particular to a turbine, a gas turbine and a moving blade assembly. Background Art

[0002] Gas turbine blade tips are prone to axial gas leakage. Therefore, these tips are typically equipped with leakage-reducing structures, such as various raised structures, collectively referred to as shrouds. However, centrifugal force and expansion often cause wear and tear on the blade tips. This wear and tear, which can necessitate downtime for inspection and maintenance after extended use, and in severe cases, even blade replacement, resulting in lengthy repair times and high operating costs. 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 the present invention provides a turbine, wherein the blade crown of the turbine's moving blade assembly has the advantages of long service life and convenient replacement.

[0005] An embodiment of the present invention provides a gas turbine, wherein the turbine of the gas turbine includes a moving blade assembly having a blade crown that has a long service life and is easy to replace.

[0006] An embodiment of the present invention provides a moving blade assembly, wherein the blade crown of the moving blade assembly has the advantages of long service life and convenient replacement.

[0007] The turbine of the embodiment of the present invention comprises:

[0008] a body, wherein the body has a cavity therein;

[0009] a rotating shaft, the rotating shaft being disposed on the body and being rotatable relative to the body; at least a portion of the rotating shaft being located within the cavity; and an extending direction of the rotating shaft being consistent with an extending direction of the body;

[0010] A moving blade assembly, wherein the moving blade assembly includes a plurality of moving blades, the moving blades being located in the chamber, the plurality of moving blades being arranged at intervals along the circumference of the rotating shaft, the moving blades including a moving blade body, a blade top and a blade crown, the moving blade body being connected to the outer circumferential surface of the rotating shaft, the blade top being arranged at an end of the moving blade body away from the rotating shaft, the blade crown being detachably connected to the blade top, and the position of the blade crown relative to the blade top being adjustable in a direction away from the moving blade body.

[0011] After a turbine according to an embodiment of the present invention has been used for a long time, the blade crowns on the moving blades can be removed after being worn, and new blade crowns can be installed on the moving blades, thus avoiding the need to replace the entire moving blades, shortening maintenance time, and reducing usage costs.

[0012] In addition, after the blade crown is worn, it can be moved away from the moving blade body so that the distance between the top of the blade crown and the moving blade body after movement is consistent with that before the blade crown was worn. Therefore, the blade crown in the turbine of the embodiment of the present invention also has the advantage of a long service life.

[0013] In some embodiments, a connecting groove is provided on the side of the blade top away from the moving blade body, and the blade crown includes a protrusion and a connecting portion, the protrusion is connected to the connecting portion, at least part of the connecting portion is engaged in the connecting groove, and the protrusion is located on the side of the blade top away from the moving blade body.

[0014] In some embodiments, the outer peripheral surface of the connecting portion is provided with a plurality of protrusions arranged at intervals in the direction from the blade top to the rotating shaft, and the inner wall surface of the connecting groove is provided with a plurality of grooves arranged at intervals in the direction from the blade top to the rotating shaft, and any one of the plurality of protrusions can cooperate with any one of the plurality of grooves.

[0015] In some embodiments, the blade crown is connected to at least one of the blade tips.

[0016] In some embodiments, the protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are spaced apart in an axial direction from the blade tip to the rotor shaft.

[0017] In some embodiments, the first protrusion includes a first curved surface, the first curved surface is provided on a side of the first protrusion away from the connecting portion, and the first curved surface protrudes toward the side away from the connecting portion; the second protrusion includes a second curved surface, the second curved surface is provided on a side of the second protrusion away from the connecting portion, and the second curved surface protrudes toward the side away from the connecting portion.

[0018] In some embodiments, a ratio of a dimension of the connecting portion in a direction from the connecting portion to the protruding portion to a dimension of the protruding portion in a direction from the connecting portion to the protruding portion is greater than or equal to 0.5.

[0019] In some embodiments, a ratio of a dimension of the connecting portion in the extending direction of the rotating shaft to a maximum dimension of the protruding portion in the extending direction of the rotating shaft is not less than 0.3.

[0020] A gas turbine according to an embodiment of the present invention includes a turbine, and the turbine is the turbine according to any one of the above embodiments.

[0021] The moving blade assembly of the embodiment of the present invention includes:

[0022] Moving leaf body;

[0023] a blade top, the blade top being arranged at one end in the height direction of the moving blade body;

[0024] A blade crown is detachably connected to the blade top, and the position of the blade crown relative to the moving blade body is adjustable in a direction away from the moving blade body. There are multiple blade crowns, and the multiple blade crowns are arranged at intervals along the width direction of the moving blade body.

[0025] In some embodiments, a connecting groove is provided on the side of the blade top away from the moving blade body, and the blade crown includes a protrusion and a connecting portion, the protrusion is connected to the connecting portion, at least part of the connecting portion is engaged in the connecting groove, and the protrusion is located on the side of the blade top away from the moving blade body.

[0026] In some embodiments, the outer peripheral surface of the connecting portion is provided with a plurality of protrusions arranged at intervals along the height direction of the moving blade body, and the inner wall surface of the connecting groove is provided with a plurality of grooves arranged at intervals along the height direction of the moving blade body, and any one of the plurality of protrusions can cooperate with any one of the plurality of grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 2 is a schematic structural diagram of a moving blade assembly according to an embodiment of the present invention.

[0028] Figure 2 It is a partial structural schematic diagram of the moving blade assembly according to an embodiment of the present invention.

[0029] Figure 3 It is a partial structural schematic diagram of the moving blade assembly according to an embodiment of the present invention.

[0030] Figure 4 Schematic diagram of the structure of the blade crown according to an embodiment of the present invention.

[0031] Figure 5 Schematic diagram of the structure of the blade crown according to an embodiment of the present invention.

[0032] Figure 6 Schematic diagram of the structure of the blade crown according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Moving blade body 1;

[0035] Leaf top 2;

[0036] The leaf crown 3; the protruding portion 31; the connecting portion 32; the first side surface 321; the first protrusion 3211; the first arcuate surface 3212; the second side surface 322; the second protrusion 3221; and the second arcuate surface 3222. DETAILED DESCRIPTION

[0037] 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.

[0038] The turbine (not shown in the figure) according to the embodiment of the present invention comprises: a body, a rotating shaft and a moving blade assembly, wherein the moving blade assembly is the moving blade assembly according to the embodiment of the present invention.

[0039] The body includes a chamber. A rotating shaft is disposed through the body, and at least a portion of the rotating shaft is located within the chamber and is rotatable relative to the body. The rotating shaft extends in the same direction as the body. It is understood that the rotating shaft is the output shaft of the turbine, and rotation thereof drives the impeller assembly to rotate.

[0040] The moving blade assembly includes a plurality of moving blades, which are located in the chamber and spaced apart along the circumference of the rotating shaft. The moving blade includes a moving blade body 1, a blade tip 2, and a blade crown 3. The moving blade body 1 is connected to the outer circumference of the rotating shaft, and the blade tip 2 is provided at the end of the moving blade body 1 away from the rotating shaft. The blade crown 3 is detachably connected to the blade tip 2, and the position of the blade crown 3 relative to the blade tip 2 is adjustable in a direction away from the moving blade body 1. Preferably, as Figure 1 As shown, there are multiple blade shrouds 3, which are spaced apart along the axial direction of the rotating shaft. In other words, there is only one blade shroud 3, which is arranged along the circumference of the moving blade assembly, or there are multiple blade shrouds 3, which are spaced apart along the axial direction of the rotating shaft.

[0041] Specifically, if Figure 1 and Figure 2 As shown, the blade top 2 is arranged at the upper end of the moving blade body 1, and the blade crown 3 and the blade top 2 can be connected by snapping or plugging to facilitate the removal and replacement of the blade crown 3. The blade crown 3 can move in the up and down directions and relative to the moving blade body 1.

[0042] It is understandable that if Figure 3 As shown, the extension direction of the shaft is in the same direction as the width direction of the blade crown 3 (as shown in FIG. Figure 4 The number of blade crowns 3 can be set according to turbines of different specifications to avoid leakage of large amounts of gas.

[0043] That is to say, after the turbine of the embodiment of the present invention has been used for a long time, the blades are affected by factors such as high temperature and vibration, and the blade shroud 3 on the blades will be worn. The blade shroud 3 on the turbine of the embodiment of the present invention can be removed after being worn, and then a new blade shroud 3 can be installed on the blades, thereby avoiding the need to replace the entire blades, shortening the maintenance time, and reducing the cost of use.

[0044] like Figure 2 As shown in FIG, the connection portion of the blade crown 3 is completely matched with the blade tip. Figure 3 As shown, the worn blade crown 3 is moved away from the moving blade body 1 (i.e., the blade crown 3 is moved upward), so that the distance between the top end of the blade crown 3 and the moving blade body 1 after movement is consistent with that before the blade crown 3 is worn. Therefore, the blade crown 3 in the turbine of the embodiment of the present invention also has the advantage of a long service life.

[0045] In some embodiments, a connecting groove is provided on the side of the blade tip 2 away from the moving blade body 1, and the blade crown 3 includes a protrusion 31 and a connecting portion 32, the protrusion 31 is connected to the connecting portion 32, and at least a portion of the connecting portion 32 is fitted in the connecting groove, and the protrusion 31 is located on the side of the blade tip 2 away from the moving blade body 1.

[0046] Specifically, if Figure 2 As shown, a connecting groove is provided on the upper surface of the blade tip 2, and the connecting portion 32 is fitted into the connecting groove to connect the blade crown 3 to the blade tip 2. The protrusion 31 is connected to the upper end of the connecting portion 32.

[0047] It can be understood that the protrusion 31 is located between the moving blade and the peripheral wall of the turbine chamber, that is, the protrusion 31 is the wear part of the blade crown 3. When the protrusion 31 is not worn, the connecting portion 32 is completely placed in the connecting groove. Figure 2 and Figure 3 As shown, when the protrusion 31 is worn and the gap between the upper end of the protrusion 31 and the peripheral wall of the turbine chamber is large, the blade crown 3 is moved upward so that a part of the connecting portion 32 is placed in the connecting groove and the other part of the connecting groove is placed on the outside of the blade top 2.

[0048] In some embodiments, the outer peripheral surface of the connecting portion 32 is provided with a plurality of protrusions arranged at intervals in the direction from the blade top 2 to the rotating shaft, and the inner wall surface of the connecting groove is provided with a plurality of grooves arranged at intervals in the direction from the blade top 2 to the rotating shaft, and any one of the plurality of protrusions can cooperate with any one of the plurality of grooves.

[0049] Specifically, if Figure 3-Figure 6 As shown, multiple protrusions are arranged at intervals along the up and down directions on the outer peripheral surface of the connecting portion 32, and the multiple protrusions correspond to the multiple grooves one by one to connect the blade crown 3 with the blade tip 2, and can achieve the purpose of moving the blade crown 3 upward once the blade tip 2 is worn.

[0050] In some embodiments, the blade shroud 3 is connected to at least one blade tip 2 .

[0051] It is understood that one blade shroud 3 can be installed on two adjacent blade tips 2, that is, one blade shroud 3 can be installed on multiple blade tips 2, which can reduce vibration of the rotor blade and improve the stability of the rotor blade assembly. Of course, one blade shroud 3 can also be installed on multiple (greater than two) adjacent blade tips 2.

[0052] Optionally, the protrusion includes a first protrusion 3211 and a second protrusion 3221 , and the first protrusion 3211 and the second protrusion 3221 are arranged at intervals in a direction from the blade tip 2 to the rotation shaft.

[0053] Specifically, if Figure 3 、 Figure 5 and Figure 6 As shown, the connecting portion 32 includes a first side surface 321 and a second side surface 322 arranged along the left-right direction, the left side surface of the connecting portion 32 is the first side surface 321, the right side surface of the connecting portion 32 is the second side surface 322, the first protrusion 3211 is provided on the first side surface 321, and the second protrusion 3221 is provided on the second side surface 322.

[0054] It is understandable that the two sidewalls of the groove are respectively provided with a first groove and a second groove, the first protrusion 3211 can be fitted into the first groove, and the second protrusion 3221 can be fitted into the second groove. Of course, the first protrusion 3211 can also be fitted into the second groove, and the second protrusion 3221 can also be fitted into the first groove.

[0055] In other words, there are multiple ways to install the blade crown 3 and the blade tip 2. That is, the blade crown 3 can also be matched with the blade tip 2 through the groove after being rotated 180 degrees.

[0056] In some embodiments, the first protrusion 3211 includes a first curved surface 3212, which is arranged on the side of the first protrusion 3211 away from the connecting portion 32, and the first curved surface 3212 protrudes toward the side away from the connecting portion 32; the second protrusion 3221 includes a second curved surface 3222, which is arranged on the side of the second protrusion 3221 away from the connecting portion 32, and the second curved surface 3222 protrudes toward the side away from the connecting portion 32.

[0057] Specifically, if Figure 6 As shown, the left side of the first protrusion 3211 is a first arcuate surface 3212, which protrudes to the left. The right side of the second protrusion 3221 is a second arcuate surface 3222, which protrudes to the right.

[0058] It is understandable that the blade crown 3 can be provided with protrusions of different shapes according to its own material or structural strength, so as to make the blade crown 3 fit more firmly with the blade tip 2 and improve the connection strength between the blade crown 3 and the blade tip 2.

[0059] Preferably, the ratio of the dimension of the connecting portion 32 in the direction from the connecting portion 32 to the protruding portion 31 to the dimension of the protruding portion 31 in the direction from the connecting portion 32 to the protruding portion 31 is greater than or equal to 0.5.

[0060] It is understandable that if Figure 5As shown, the dimension of the connecting portion 32 in the left-right direction is a, and the dimension of the protruding portion 31 in the left-right direction is A, then a / A≥0.5.

[0061] It should be noted that, according to the thickness of the blade tip 2 , a / A≥0.5 is set, wherein, within the range of the blade tip 2 thickness, the larger a / A is, the stronger the connection strength between the blade crown 3 and the blade tip 2 is.

[0062] Preferably, the ratio of the dimension of the connecting portion 32 in the extending direction of the rotating shaft to the maximum dimension of the protruding portion 31 in the extending direction of the rotating shaft is not less than 0.3.

[0063] It is understandable that if Figure 4 As shown, the dimension of the connecting portion 32 in the vertical direction is b, and the maximum dimension of the protruding portion 31 in the vertical direction is B. That is, the larger the b / B is, the stronger the connection strength between the blade shroud 3 and the blade tip 2 is.

[0064] A gas turbine according to an embodiment of the present invention includes a turbine, which is a turbine according to any one of the above embodiments.

[0065] It is understood that when the blade shroud of the gas turbine of the embodiment of the present invention is worn, the blade shroud can be directly disassembled and replaced, or the blade shroud can be moved away from the shaft (i.e., radially of the shaft) to increase the service life of the blade shroud.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A turbine, characterized in that: include: a body, wherein the body has a cavity therein; a rotating shaft, the rotating shaft being disposed on the body and being rotatable relative to the body; at least a portion of the rotating shaft being located within the cavity; and an extending direction of the rotating shaft being consistent with an extending direction of the body; a moving blade assembly, the moving blade assembly comprising a plurality of moving blades, the moving blades being located in the chamber and spaced apart along the circumference of the rotating shaft, the moving blade comprising a moving blade body, a blade tip, and a blade shroud, the moving blade body being connected to the outer circumferential surface of the rotating shaft, the blade tip being provided at an end of the moving blade body away from the rotating shaft, the blade shroud being detachably connected to the blade tip, and the blade shroud being positionally adjustable relative to the blade tip in a direction away from the moving blade body; A connecting groove is provided on a side of the blade tip away from the blade body, the blade crown includes a protruding portion and a connecting portion, the protruding portion is connected to the connecting portion, at least a portion of the connecting portion is engaged with the connecting groove, and the protruding portion is located on a side of the blade tip away from the blade body; The outer peripheral surface of the connecting portion is provided with a plurality of protrusions arranged at intervals in the direction from the blade top to the rotating shaft, and the inner wall surface of the connecting groove is provided with a plurality of grooves arranged at intervals in the direction from the blade top to the rotating shaft, and any one of the plurality of protrusions can cooperate with any one of the plurality of grooves.

2. The turbine according to claim 1, characterized in that The blade crown is connected to at least one of the blade tips.

3. The turbine according to claim 1, characterized in that The protrusions include a first protrusion and a second protrusion, and the first protrusion and the second protrusion are arranged at intervals along the axial direction of the rotating shaft.

4. The turbine according to claim 3, characterized in that The first protrusion includes a first arcuate surface, which is provided on a side of the first protrusion away from the connecting portion, and the first arcuate surface protrudes toward the side away from the connecting portion; the second protrusion includes a second arcuate surface, which is provided on a side of the second protrusion away from the connecting portion, and the second arcuate surface protrudes toward the side away from the connecting portion.

5. The turbine according to claim 1, characterized in that A ratio of a dimension of the connecting portion in a direction from the connecting portion to the protruding portion to a dimension of the protruding portion in a direction from the connecting portion to the protruding portion is greater than or equal to 0.

5.

6. The turbine according to claim 1, characterized in that A ratio of a dimension of the connecting portion in the extending direction of the rotating shaft to a maximum dimension of the protruding portion in the extending direction of the rotating shaft is not less than 0.

3.

7. A gas turbine, characterized in that: The invention comprises a turbine, wherein the turbine is the turbine according to any one of claims 1-6.

8. A moving blade assembly, characterized in that: include: Moving leaf body; a blade top, the blade top being arranged at one end in the height direction of the moving blade body; a blade shroud, the blade shroud being detachably connected to the blade tip and positionally adjustable relative to the moving blade body in a direction away from the moving blade body, the blade shroud being provided in plurality and being spaced apart along the width direction of the moving blade body; A connecting groove is provided on a side of the blade tip away from the blade body, the blade crown includes a protruding portion and a connecting portion, the protruding portion is connected to the connecting portion, at least a portion of the connecting portion is engaged with the connecting groove, and the protruding portion is located on a side of the blade tip away from the blade body; The outer peripheral surface of the connecting portion is provided with a plurality of protrusions arranged at intervals along the height direction of the moving blade body, and the inner wall surface of the connecting groove is provided with a plurality of grooves arranged at intervals along the height direction of the moving blade body, and any one of the plurality of protrusions can cooperate with any one of the plurality of grooves.

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