Full-load high-stability mixed-flow water turbine runner

Abstract

The utility model relates to the field of water turbines, in particular to a full-load high-stability mixed-flow water turbine runner which comprises a rotating shaft, a blade assembly is arranged on the outer wall of the rotating shaft, the blade assembly comprises an inserting plate, the inserting plate is connected to the front end of the rotating shaft in an inserted mode, and the inserting plate is connected with the rotating shaft in an inserted mode. A fixing assembly is arranged at the front end of the rotating shaft and comprises a sealing cover, the sealing cover is fixedly installed at the front end of the rotating shaft through a bolt, the blade assembly further comprises a transverse wing, the right end of the transverse wing is fixedly connected to the left end of an inserting plate, a reinforcing block is arranged at the top end of the transverse wing, a vertical wing is arranged at the left end of the transverse wing, and the vertical wing is fixedly connected to the right end of the inserting plate. The fixing assembly further comprises an inserting block. According to the device, the blade assembly can be exposed by taking down the sealing cover, then the insertion block can be driven to be separated from the inner wall of the fixing groove by rotating the rotating block, then the damaged blade assembly can be independently taken down and replaced, and the whole device is good in economical efficiency when used.

Description

Technical Field

[0001] The utility model relates to the field of water turbines, in particular to a full-load high-stability Francis water turbine runner. Background Art

[0002] A mixed flow turbine is a hydraulic generator used to convert the kinetic energy of water flow into mechanical energy and then into electrical energy. A mixed flow turbine is usually composed of multiple components, including a runner. As a component that provides rotational power, the runner often has to withstand large impact and shear stress, and its blades are very easy to be damaged. Existing runners are usually integrated and need to be replaced as a whole when damaged, and the overall device has poor economy.

[0003] After searching, Chinese patent announcement number: CN217107289U discloses a runner blade for a mixed flow turbine, which relates to the technical field of rotating blades, including an upper bracket, a lower bracket is arranged at the lower end of the upper bracket, a blade body is arranged between the lower bracket and the upper bracket, a hollow column is arranged on the outer surface of the upper bracket, an inner rotating structure is arranged inside the hollow column, an outer rotating structure is arranged on the outer surface of the lower bracket, the inner rotating structure includes a support plate arranged on the outer surface of the inner wall of the hollow column, an outer limit strip is arranged on the outer surface of the inner wall of the hollow column near the upper end of the support plate, and a bearing is arranged on the upper end of the support plate. The utility model solves the problem that the internal wear of the rotating axis of the rotating blades of the existing mixed flow turbine is large, and it is inconvenient to install the internal bearing, which is not conducive to long-term use, and the lower bracket part also rotates at high speed with the blade, wears more and has poor durability.

[0004] When the device is in use, that is, an integrated blade is used. Once one of the blades is damaged, the entire blade needs to be replaced. The overall device is less economical when in use. Therefore, a full-load high-stability mixed flow turbine runner is proposed to solve the above problem. Utility Model Content

[0005] In order to remedy the above deficiencies, the utility model provides a full-load high-stability mixed-flow turbine runner, aiming to improve the problem in the prior art that "after the existing turbine runner blades are damaged, all blades need to be replaced, and the overall device economy is poor".

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a full-load high-stability mixed flow turbine runner, including a rotating shaft, the outer wall of the rotating shaft is provided with a blade assembly, the blade assembly includes a plug plate, the plug plate is plugged into the front end of the rotating shaft, the front end of the rotating shaft is provided with a fixing assembly, the fixing assembly includes a closing cover, and the closing cover is fixedly installed on the front end of the rotating shaft by bolts.

[0007] Preferably, the blade assembly further comprises a transverse wing, the right end of the transverse wing is fixedly connected to the left end of the plug plate, a reinforcement block is arranged at the top end of the transverse wing, and a vertical wing is arranged at the left end of the transverse wing.

[0008] Preferably, the fixing assembly further comprises an insert block, the insert block penetrates through and is slidably connected to the inner wall of the rotating shaft, a fixing groove is provided at the right end of the insert plate, and the fixing groove and the insert block are matched.

[0009] Preferably, the front end of the insert block is fixedly connected to a cylindrical block, the inner wall of the rotating shaft is rotatably connected to a rotating plate, the front end of the rotating plate is provided with an inclined groove, and the cylindrical block slides on the inner wall of the inclined groove.

[0010] Preferably, the front end of the rotating plate is fixedly connected with a rotating block, the rotating block passes through and is rotatably connected to the front end of the rotating shaft, the left end of the rotating block is slidably connected with a clamping block, the front end of the rotating shaft is fixedly connected with a fixing ring, the inner wall of the fixing ring is provided with an adjusting groove, and the adjusting groove and the clamping block are adapted to each other.

[0011] Preferably, a fixing spring is fixedly connected to the right end of the clamping block, a baffle is fixedly connected to the right end of the fixing spring, and the baffle is fixedly connected to the inner wall of the rotating block.

[0012] Preferably, the left end of the insert block is slidably connected to a ball block, the right end of the ball block is fixedly connected to a positioning spring, and the right end of the positioning spring is fixedly connected to the inner wall of the insert block.

[0013] Preferably, a receiving groove is provided at the rear end of the closing cover, and the receiving groove is adapted to the clamping block, the rotating block and the fixing ring.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the blade assembly can be exposed by removing the closing cover, and then the insert block can be driven to separate from the inner wall of the fixing groove by rotating the rotating block, and then the damaged blade assembly can be removed and replaced separately, and the overall device is economical when used.

[0016] 2. In the utility model, by thickening the root of the lateral wing and providing a reinforcement block on its surface, the supporting capacity of the entire blade assembly can be increased. At the same time, the operator can freely add or reduce the number of blade assemblies according to different usage conditions, and the overall device has better stability when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the overall device in the utility model.

[0018] Figure 2It is a schematic diagram of the three-dimensional structure disassembly of the overall device in the utility model.

[0019] Figure 3 It is a rear view schematic diagram of the three-dimensional structure of the closing cover in the utility model.

[0020] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the rotating shaft in the utility model.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure disassembly of the insert block in the utility model.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the blade assembly in the utility model.

[0023] Description of the drawings: 1. Rotating shaft; 2. Fixed assembly; 21. Closing cover; 22. Rotating block; 23. Block; 24. Fixed spring; 25. Baffle; 26. Insert block; 27. Fixed groove; 28. Storage groove; 29. ​​Fixed ring; 210. Adjustment groove; 211. Rotating plate; 212. Oblique groove; 213. Cylindrical block; 214. Ball block; 215. Positioning spring; 3. Blade assembly; 31. Insert plate; 32. Horizontal wing; 33. Reinforcement block; 34. Vertical wing. DETAILED DESCRIPTION

[0024] Reference Figure 1 , Figure 2 , Figure 6 The utility model provides an embodiment: a full-load high-stability Francis turbine runner, including a rotating shaft 1 for supporting the rotation of the entire device, the outer wall of the rotating shaft 1 is provided with a blade assembly 3 for driving the rotating shaft 1 to rotate, the blade assembly 3 includes a plug plate 31 for fixing the entire blade assembly 3, the plug plate 31 is plugged into the front end of the rotating shaft 1, the front end of the rotating shaft 1 is provided with a fixing assembly 2 for fixing the blade assembly 3, the fixing assembly 2 includes a closing cover 21 for closing the front surface of the rotating shaft 1, the closing cover 21 is bolted It is fixedly installed at the front end of the rotating shaft 1, and the closing cover 21 can be fixed to the front end of the rotating shaft 1 by installing bolts. The blade assembly 3 also includes a transverse wing 32 for supporting the vertical wing 34. The overall cross-section of the transverse wing 32 is trapezoidal, and the thickness of the end close to the plug plate 31 is thicker, so that it can have a greater fracture resistance. The right end of the transverse wing 32 is fixedly connected to the left end of the plug plate 31. The top of the transverse wing 32 is provided with a reinforcement block 33 for increasing the supporting capacity of the transverse wing 32, and the left end of the transverse wing 32 is provided with a vertical wing 34 for driving the rotating shaft 1 to rotate.

[0025] Reference Figure 2 , Figure 4 , Figure 5The fixing assembly 2 also includes an insert block 26 for fixing the insert plate 31. The insert block 26 penetrates and is slidably connected to the inner wall of the rotating shaft 1. A fixing groove 27 for accommodating the insert block 26 is provided at the right end of the insert plate 31. The fixing groove 27 and the insert block 26 are adapted. When the insert block 26 is inserted into the fixing groove 27, the insert plate 31 will be fixed to the outer wall of the rotating shaft 1 and cannot be moved outward. The front end of the insert block 26 is fixedly connected with a cylindrical block 213 for driving the insert block 26 to move. The inner wall of the rotating shaft 1 is rotatably connected with a rotating plate 211 for driving the cylindrical block 213 to move. The front end of the rotating plate 211 is provided with an inclined groove 212 for squeezing the cylindrical block 213. The cylindrical block 213 slides on the inner wall of the inclined groove 212. The rotating plate 211 is rotated. The cylindrical block 213 can be driven to move inward or outward through the inclined groove 212. The front end of the rotating plate 211 is fixedly connected with a rotating block 22 for driving the rotating plate 211 to rotate. The rotating block 22 penetrates and is rotatably connected to the front end of the rotating shaft 1. The rotating plate 211 can be driven to rotate by rotating the rotating block 22. The left end of the rotating block 22 is slidably connected with a block 23 for fixing the rotating block 22. The front end of the rotating shaft 1 is fixedly connected with a fixing ring 29 for fixing the rotating block 22. The inner wall of the fixing ring 29 is provided with an adjusting groove 210 for accommodating the block 23. The adjusting groove 210 is adapted to the block 23. The bottom end of the block 23 is provided with an inclined surface. When the inclined surface is squeezed, the block 23 is forced to move toward the inside of the rotating block 22.

[0026] Refer to the figure Figure 3 , Figure 4 , Figure 5 The right end of the card block 23 is fixedly connected with a fixing spring 24 for pushing the card block 23, and the right end of the fixing spring 24 is fixedly connected with a baffle 25 for supporting the fixing spring 24. The baffle 25 is fixedly connected to the inner wall of the rotating block 22. The fixing spring 24 will always push the card block 23 outward under the support of the baffle 25. The left end of the plug block 26 is slidably connected with a ball block 214 for preventing the plug plate 31 from arbitrarily separating from the rotating shaft 1. The left end of the ball block 214 is an arc-shaped surface, which will be forced to move toward the inside of the plug block 26 when squeezed. The right end of 14 is fixedly connected with a positioning spring 215 for pushing the ball block 214. The right end of the positioning spring 215 is fixedly connected to the inner wall of the insert block 26. The positioning spring 215 will always push the ball block 214 outward. The rear end of the closing cover 21 is provided with a receiving groove 28 for accommodating the card block 23. The receiving groove 28 is adapted to the card block 23, the rotating block 22, and the fixing ring 29. When the rear end of the closing cover 21 is in contact with the front end of the rotating shaft 1, the card block 23, the rotating block 22, and the fixing ring 29 will just fit into the inside of the receiving groove 28.

[0027] Working principle: when the blade assembly 3 needs to be replaced, the bolts can be removed first to remove the closing cover 21, and then the block 23 can be pushed inward to drive the block 23 out of the adjusting groove 210, and then the block 23 can be rotated to drive the rotating plate 211 to rotate. When the rotating plate 211 rotates, it will squeeze the cylindrical block 213 through the inclined groove 212 to drive the plug block 26 to move inward and out of the fixed groove 27, but at this time the ball block 214 is still stuck in the fixed groove 27, so the plug plate 31 still does not separate from the outer wall of the rotating shaft 1, and then the plug plate 31 that needs to be replaced can be pulled out, and the plug plate 31 can be inserted. When the plate 31 moves outward, it squeezes the ball block 214 to make it enter the interior of the insert block 26. When the damaged blade assembly 3 is removed, the newly replaced blade assembly 3 can be inserted into the outside of the rotating shaft 1 according to the original path, and then the rotating block 22 can be rotated to drive the rotating plate 211 to rotate. The rotation of the rotating plate 211 will squeeze the cylindrical block 213 through the inclined groove 212 to force the insert block 26 to insert into the interior of the fixing groove 27 to re-fix the insert plate 31. Then the closing cover 21 can be reinstalled on the front end of the rotating shaft 1 using bolts. At this time, the new blade assembly 3 is replaced.

Claims

1. A full-load high-stability Francis turbine runner, comprising a rotating shaft (1), characterized in that: The outer wall of the rotating shaft (1) is provided with a blade assembly (3), the blade assembly (3) comprising an insert plate (31), the insert plate (31) being inserted into the front end of the rotating shaft (1), the front end of the rotating shaft (1) is provided with a fixing assembly (2), the fixing assembly (2) comprising a closing cover (21), the closing cover (21) being fixedly mounted on the front end of the rotating shaft (1) by means of bolts.

2. A fully loaded high stability Francis turbine runner according to claim 1, characterized in that: The blade assembly (3) further comprises a transverse wing (32), the right end of the transverse wing (32) being fixedly connected to the left end of the plug plate (31), a reinforcing block (33) being arranged at the top end of the transverse wing (32), and a vertical wing (34) being arranged at the left end of the transverse wing (32).

3. A fully loaded high stability Francis turbine runner according to claim 1, characterized in that: The fixing assembly (2) further comprises an insert block (26), the insert block (26) passing through and slidably connected to the inner wall of the rotating shaft (1), and a fixing groove (27) is provided at the right end of the insert plate (31), the fixing groove (27) and the insert block (26) being adapted to each other.

4. A fully loaded high stability Francis turbine runner according to claim 3, characterized in that: The front end of the insert block (26) is fixedly connected to a cylindrical block (213), the inner wall of the rotating shaft (1) is rotatably connected to a rotating plate (211), the front end of the rotating plate (211) is provided with an inclined groove (212), and the cylindrical block (213) slides on the inner wall of the inclined groove (212).

5. A fully loaded high stability Francis turbine runner according to claim 4, characterized in that: The front end of the rotating plate (211) is fixedly connected to a rotating block (22), the rotating block (22) penetrates and is rotatably connected to the front end of the rotating shaft (1), the left end of the rotating block (22) is slidably connected to a clamping block (23), the front end of the rotating shaft (1) is fixedly connected to a fixing ring (29), the inner wall of the fixing ring (29) is provided with an adjusting groove (210), and the adjusting groove (210) and the clamping block (23) are adapted to each other.

6. A fully loaded high stability Francis turbine runner according to claim 5, characterized in that: The right end of the clamping block (23) is fixedly connected to a fixing spring (24), the right end of the fixing spring (24) is fixedly connected to a baffle (25), and the baffle (25) is fixedly connected to the inner wall of the rotating block (22).

7. A fully loaded high stability Francis turbine runner according to claim 3, characterized in that: The left end of the insert block (26) is slidably connected to a ball block (214), the right end of the ball block (214) is fixedly connected to a positioning spring (215), and the right end of the positioning spring (215) is fixedly connected to the inner wall of the insert block (26).

8. A fully loaded high stability Francis turbine runner according to claim 5, characterized in that: A receiving groove (28) is provided at the rear end of the closing cover (21), and the receiving groove (28) is compatible with the clamping block (23), the rotating block (22), and the fixing ring (29).

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