Segmented spliced turbine blade with self-locking tenon

Abstract

The utility model discloses a steam turbine blade with a segmental spliced self-locking tenon, which belongs to the field of blades and comprises a slider, a segmental blade component is fixedly connected to the side of the slider, and the integral blade is split into a first segmental blade and a second segmental blade by the aid of the segmental blade component. A large blade is split into two small blades, storage of a transport vehicle is facilitated, transport is more convenient, when the first segmented blade and the second segmented blade are mutually assembled, a first sliding column is pushed to move inwards through an ejector pin, then a connecting block and an inserting rod are correspondingly inserted, the ejector pin is replaced with the inserting rod, and the first sliding column and the second sliding column are mutually assembled. The connecting block extrudes the second sliding column to contract, when the fixing hole moves to the side face position of the second sliding column, the spring recovers to be opened, the second sliding column moves reversely and is inserted into the fixing hole, and therefore the connecting block is locked, the first segmented blade and the second segmented blade are installed more fixedly and are not prone to loosening and disintegration, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of blades, in particular to a steam turbine blade with segmented splicing and self-locking tenons. Background Art

[0002] Steam turbine blade replacement is a general term for the steel used for the moving and stationary blades in steam turbines. The blades are key parts of steam turbines and are also one of the most delicate and important parts. In the prior art, the Chinese utility model patent with the public document number: CN216741812U discloses a segmented wind turbine blade with web splicing. The utility model provides a segmented wind turbine blade with web splicing, which effectively improves the structural reliability of the wind turbine blade;

[0003] However, wind turbine blades are fixed with bolts and nuts, which are prone to loosening during use, posing a safety hazard. In the use of large steam turbine blades of low pressure and equal thickness, segmented splicing can effectively reduce the difficulty of transporting large blades. However, after being fixed and connected with bolts and nuts, the segmented blades are at risk of loosening and disintegration, so improvement is needed. Utility Model Content

[0004] The main purpose of the utility model is to provide a steam turbine blade with segmented splicing and self-locking tenons, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The steam turbine blade with segmented self-locking tenons comprises a slider, a side position of the slider is fixedly connected with a segmented blade assembly, the segmented blade assembly comprises a No. 1 segmented blade, a No. 2 segmented blade, a connecting groove, a protruding platform, a positioning hole, a connecting block, a plug rod, a No. 1 slide column, a No. 2 slide column and a spring, the No. 1 segmented blade is fixedly connected to the side position of the slider, the No. 2 segmented blade is fixedly connected to the side position of the No. 1 segmented blade, the connecting groove is arranged on the No. 1 segmented blade, the protruding platform is fixedly connected to the upper and lower positions of the connecting groove, the positioning hole is arranged on the No. 1 segmented blade and is located at the upper and lower positions of the connecting groove, the connecting block and the plug rod are fixedly connected to the No. 2 segmented blade, and the plug rod is located at both sides of the connecting block, the No. 1 slide column and the No. 2 slide column are movably installed, and the spring is located between the No. 1 slide column and the No. 2 slide column.

[0007] Preferably, the segmented blade assembly further includes a socket, which is provided on the segmented blade No. 1 and is interconnected with the positioning hole, and the insertion rod is movably installed in the socket.

[0008] Preferably, the segmented blade assembly also includes a recessed groove and a fixing hole, the recessed groove and the fixing hole are provided on the connecting block, the fixing hole is located in the middle of the recessed groove, the recessed groove is movably mounted on the protruding platform, and the fixing hole is movably mounted on the second slide column.

[0009] Preferably, the segmented blade assembly further includes a telescopic rod, one end of which is fixedly connected to the second sliding column, and the spring is movably mounted on the telescopic rod.

[0010] Preferably, the segmented blade assembly further includes a receiving groove and a limiting block, the receiving groove is provided in the first sliding column, the other end of the telescopic rod is fixedly connected to the limiting block, and the limiting block is movably installed in the receiving groove.

[0011] Preferably, the segmented blade assembly further includes a positioning groove and an ejector pin, wherein the positioning groove is provided on the first slide column, and the ejector pin is movably mounted on the positioning groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, through the segmented blade assembly, when in use, the first slide column and the second slide column are put into the positioning hole, and then the ejector pin is inserted into the positioning groove, so that the first slide column moves to the side position of the insertion hole, and the connecting block and the plug rod are inserted into the connecting groove and the insertion hole in sequence, and the connecting block squeezes the second slide column to make it accommodated in the positioning groove. When the plug rod moves to the side position of the first slide column, the first slide column is squeezed and limited, and the ejector pin is withdrawn, so that the plug rod replaces the ejector pin to squeeze the second slide column. As the connecting block moves inward, when the fixing hole moves to the lower position of the second slide column, the compressed spring resumes to open and pushes the second slide column to insert into the fixing hole, so that the first segmented blade and the second segmented blade are fixedly connected and locked to each other, and are not easy to loosen or disintegrate, and the safety is higher.

[0014] In the utility model, by providing a segmented blade assembly, a No. 1 segmented blade and a No. 2 segmented blade are assembled into an integral blade, so that low-pressure blades of larger size and equal thickness are easy to transport and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the protruding platform in the connecting groove of the utility model;

[0017] Figure 3 It is a schematic cross-sectional structure diagram of the positioning hole and the plug hole of the utility model;

[0018] Figure 4It is a structural schematic diagram of the connecting block and the plug rod of the utility model;

[0019] Figure 5 It is a schematic cross-sectional structural diagram of the second sliding column of the utility model.

[0020] In the figure: 1, slider; 2, segmented blade assembly; 201, segmented blade No. 1; 202, segmented blade No. 2; 203, connecting groove; 204, protruding platform; 205, positioning hole; 206, plug hole; 207, connecting block; 208, recessed groove; 209, fixing hole; 210, plug rod; 211, slide column No. 1; 212, slide column No. 2; 213, telescopic rod; 214, spring; 215, storage groove; 216, limiting block; 217, positioning groove; 218, ejector pin. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the steam turbine blade with segmented self-locking tenons comprises a slider 1, a segmented blade assembly 2 is fixedly connected to the side position of the slider 1, and the segmented blade assembly 2 comprises a segmented blade No. 1 201, a segmented blade No. 202, a connecting groove 203, a protruding platform 204, a positioning hole 205, a connecting block 207, a plug rod 210, a slide column No. 1 211, a slide column No. 212 and a spring 214, the segmented blade No. 1 201 is fixedly connected to the side position of the slider 1, the segmented blade No. 2 202 is fixedly connected to the side position of the segmented blade No. 1 201, the connecting groove 203 is provided on the segmented blade No. 1 201, and the protruding platform 204 is fixedly connected to the connecting groove 203 The segmented blade assembly 2 further includes a recessed groove 208 and a fixing hole 209 at the upper and lower positions. The recessed groove 208 and the fixing hole 209 are provided on the connecting block 207. The fixing hole 209 is located at the middle position of the recessed groove 208. The recessed groove 208 and the protruding platform 204 are movably installed. The fixing hole 209 and the second sliding column 212 are movably installed. The recessed groove 208 and the protruding platform 204 are installed with each other, so that the first segmented blade 201 and the second segmented blade 202 are mutually clamped. A fixing hole 209 is provided at the middle position of the recessed groove 208. By inserting the second sliding column 212 into the fixing hole 209, the connecting block 207 is fixedly connected to the connecting groove 203.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the positioning hole 205 is opened on the first segmented blade 201 and is located above and below the connecting groove 203. The connecting block 207 and the plug rod 210 are fixedly connected to the second segmented blade 202, and the plug rod 210 is located on both sides of the connecting block 207. The first slide post 211 and the second slide post 212 are movably installed, and the spring 214 is located between the first slide post 211 and the second slide post 212. The segmented blade assembly 2 also includes a plug hole 206, which is opened on the first segmented blade 20 1, and is interconnected with the positioning hole 205, the insertion rod 210 is movably installed in the insertion hole 206, the segmented blade assembly 2 also includes a telescopic rod 213, one end of the telescopic rod 213 is fixedly connected to the second sliding column 212, and the spring 214 is movably installed on the telescopic rod 213. The segmented blade assembly 2 also includes a storage groove 215 and a limiting block 216. The storage groove 215 is opened in the first sliding column 211, and the other end of the telescopic rod 213 is fixedly connected to the limiting block 216, and the limiting block 216 is movably installed in the storage groove. The segmented blade assembly 2 further includes a positioning groove 217 and a push pin 218 in the groove 215. The positioning groove 217 is provided on the first slide post 211. The push pin 218 is movably installed with the positioning groove 217. The push pin 218 pushes the first slide post 211 inward, so that the first slide post 211, the telescopic rod 213, the spring 214 and the second slide post 212 move in the positioning hole 205. When the second slide post 212 moves to the connecting groove 203 and the first slide post 211 moves to the inner side of the insertion hole 206, the insertion rod 21 0. The connecting block 207 is inserted accordingly, and the insert rod 210 limits the No. 1 slide column 211 from the side, thereby replacing the ejector pin 218, and finally moves inward through the insert rod 210 to limit the No. 1 slide column 211 to the inner position, and then the connecting block 207 compresses the No. 2 slide column 212 to move inward, so that the connecting block 207 can continue to move. When the fixing hole 209 moves to the side position, the No. 2 slide column 212 moves in the opposite direction and is inserted into the fixing hole 209 to lock the No. 1 segmented blade 201 and the No. 2 segmented blade 202.

[0024] It should be noted that the utility model is a steam turbine blade with segmented self-locking tenons, and the overall blade structure is split into a first segmented blade 201 and a second segmented blade 202, so that the larger blade is split into two smaller blades, which is convenient for transportation. The first slide post 211 and the second slide post 212 are put into the positioning hole 205, and then the ejector pin 218 is inserted into the positioning groove 217 of the first slide post 211, so that the first slide post 211 moves inward in the positioning groove 217. The second slide post 212 moves downward and extends into the connecting groove 203, so that the first slide post 211 moves to the inner side of the insertion hole 210, does not block the insertion of the plug rod 206, inserts the connecting block 207 into the connecting groove 203, and the recessed groove 208 is movably installed with the protruding platform 204. The front end of the recessed groove 208 is provided with an inclined surface, and the plug rod 210 is synchronously inserted into the plug hole 206, so that the plug rod 210 moves in the plug hole 206. When the plug rod 210 moves to the first slide post 2 11, the first slide post 211 is squeezed by the insertion rod 210, so that the first slide post 211 is restricted, thereby replacing the ejector pin 218, at this time, the ejector pin 218 is moved out, the insertion rod 210 slides over the first slide post 211, so that the first slide post 211 slides on the surface of the insertion rod 210, thereby restricting the first slide post 211, and the connecting block 207 squeezes the second slide post 212 through the inclined surface, so that the second slide post 212 moves inward, so that the telescopic rod 213 and the restricting rod 213 are Block 216 moves synchronously, and spring 214 is compressed. When fixing hole 209 moves to the side position of No. 2 slide post 212, the restored opened spring 214 pushes No. 2 slide post 212 to move in the opposite direction, so that No. 2 slide post 212 is inserted into fixing hole 209, thereby restricting connecting block 207, so that connecting block 207 is locked in connecting groove 203, so that No. 1 segmented blade 201 and No. 2 segmented blade 202 are locked with each other, and the structure is more stable and not easy to loosen or disintegrate.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It is only a preferred embodiment of the utility model, and its description is more specific and detailed, but it cannot be understood as limiting the scope of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The embodiments can be changed, modified, replaced and deformed without departing from the principle and purpose of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A steam turbine blade with segmented self-locking tenons, comprising a slider (1), characterized in that: The side position of the slider (1) is fixedly connected to a segmented blade assembly (2), and the segmented blade assembly (2) comprises a segmented blade No. 1 (201), a segmented blade No. 2 (202), a connecting groove (203), a protruding platform (204), a positioning hole (205), a connecting block (207), an insert rod (210), a slide column No. 1 (211), a slide column No. 2 (212) and a spring (214). The segmented blade No. 1 (201) is fixedly connected to the side position of the slider (1), the segmented blade No. 2 (202) is fixedly connected to the side position of the segmented blade No. 1 (201), and the connecting groove (203) is opened. The protruding platform (204) is fixedly connected to the upper and lower positions of the connecting groove (203) on the first segmented blade (201); the positioning hole (205) is opened on the first segmented blade (201) and is located at the upper and lower positions of the connecting groove (203); the connecting block (207) and the insert rod (210) are fixedly connected to the second segmented blade (202), and the insert rod (210) is located at the two sides of the connecting block (207); the first slide column (211) and the second slide column (212) are movably installed, and the spring (214) is located between the first slide column (211) and the second slide column (212).

2. The steam turbine blade with segmented self-locking tenons according to claim 1, characterized in that: The segmented blade assembly (2) further comprises a plug hole (206), wherein the plug hole (206) is provided on the first segmented blade (201) and is in communication with the positioning hole (205), and the plug rod (210) is movably mounted in the plug hole (206).

3. The steam turbine blade with segmented self-locking tenons according to claim 2, characterized in that: The segmented blade assembly (2) further comprises a recessed groove (208) and a fixing hole (209), wherein the recessed groove (208) and the fixing hole (209) are provided on the connecting block (207), wherein the fixing hole (209) is located in the middle of the recessed groove (208), wherein the recessed groove (208) is movably mounted on the protruding platform (204), and wherein the fixing hole (209) is movably mounted on the second sliding column (212).

4. The steam turbine blade with segmented self-locking tenons according to claim 3, characterized in that: The segmented blade assembly (2) further comprises a telescopic rod (213), one end of which is fixedly connected to the second sliding column (212), and the spring (214) is movably mounted on the telescopic rod (213).

5. The steam turbine blade with segmented self-locking tenons according to claim 4, characterized in that: The segmented blade assembly (2) further comprises a receiving groove (215) and a limiting block (216); the receiving groove (215) is arranged in the first sliding column (211); the other end of the telescopic rod (213) is fixedly connected to the limiting block (216), and the limiting block (216) is movably installed in the receiving groove (215).

6. The steam turbine blade with segmented self-locking tenons according to claim 5, characterized in that: The segmented blade assembly (2) further comprises a positioning groove (217) and a push pin (218); the positioning groove (217) is provided on the first sliding column (211); and the push pin (218) is movably mounted on the positioning groove (217).

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