Blade angle adjusting device and water wheel power generation mechanism comprising same

Abstract

The utility model belongs to the technical field of power generation equipment, and relates to a blade angle adjusting device which is used for adjusting the blade angle of an impeller mechanism. The pull rod is arranged in the inner cavity of the mounting seat, and a fixing block is arranged on the pull rod; the fixing block moves back and forth in the inner cavity of the mounting seat along with the pull rod; a clamping part is arranged at the end part of one side of the pull rod; one end of the connecting rod mechanism is connected with the fixed block and the other end is fixedly connected with the blade; one end of the connecting piece is rotatably connected with the clamping part, and the other end of the connecting piece is matched with the lead screw; the driving mechanism is connected with the screw rod; the lead screw rotates under the action of the driving mechanism, so that the connecting piece is driven to move in the axial direction of the lead screw. According to the blade angle adjusting device, by arranging the mounting base, the pull rod, the connecting piece, the lead screw and the driving mechanism, accurate adjustment of the blade angle can be achieved, the structure is simple, the driving motor is arranged outside the hub and does not rotate along with the hub, and mounting and maintenance of the motor are more convenient.

Description

Technical Field

[0001] This utility model relates to the field of power generation equipment technology, specifically to a blade angle adjustment device and a hydroelectric power generation mechanism including the same. Background Technology

[0002] Hydropower, as a clean and renewable energy technology, occupies an increasingly important position in today's global energy structure. The water turbine, as the core equipment in a hydropower system, undertakes the crucial task of converting the energy of flowing water into mechanical energy—a process that is not only highly efficient but also environmentally friendly. The working principle of a water turbine is that the impact of flowing water causes the turbine blades to rotate, which in turn drives a connected generator to produce electricity or power other types of mechanical devices.

[0003] Hydropower turbines can be classified into fixed-blade turbines and rotating-blade turbines based on the method of blade mounting. Fixed-blade turbines have blades fixed to the hub, making them simple to manufacture, but their efficiency remains relatively stable with changes in head and flow rate; they are suitable for hydropower stations with small load and head variations. Rotating-blade turbines, on the other hand, have blades that are rotatably mounted on the hub. During operation, the blades can be rotated to face the water flow at different angles, thus adjusting efficiency. Therefore, rotating-blade turbines have a wider range of applications and can maintain excellent energy conversion efficiency under varying head and flow conditions. However, in existing technology, some angle adjustment devices used in rotating-blade turbines are relatively complex in structure, and the corresponding drive motors are usually directly installed inside the hub, requiring the motor to rotate with the impeller mechanism, which is inconvenient for installation and maintenance. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a blade angle adjustment device that is simple in structure and easy to maintain.

[0005] The technical solution of this utility model is as follows: This application first provides a blade angle adjustment device for adjusting the blade angle of an impeller mechanism, comprising: a mounting base fixed in the impeller mechanism, the mounting base having a cavity inside; a pull rod disposed in the cavity of the mounting base, a fixing block disposed on the pull rod; the fixing block moving back and forth with the pull rod in the cavity of the mounting base; a snap-fit ​​portion disposed on one end of the pull rod; a linkage mechanism including a first link and a second link, one end of the first link being connected to the fixing block, the other end of the first link being hinged to one end of the second link, and the other end of the second link being fixedly connected to the blade; a connecting member, one end of the connecting member being rotatably connected to the snap-fit ​​portion, and the other end of the connecting member having a screw hole; a lead screw, one end of the lead screw engaging with the screw hole; a drive mechanism connected to the other end of the lead screw; under the action of the drive mechanism, the lead screw rotates, thereby driving the connecting member to move along the axial direction of the lead screw.

[0006] Furthermore, the impeller mechanism includes a hub, with a ring of blades arranged on the outer side of the hub, and the mounting base is fixedly installed inside the hub; the blades include an impeller shaft and a blade body, and the end of the impeller shaft passes through the hub and is fixedly connected to the second connecting rod.

[0007] Furthermore, end caps and a main shaft are respectively provided at both ends of the hub, and a through hole is provided in the middle of the main shaft, which facilitates the passage of the tie rod.

[0008] Furthermore, the mounting base is provided with a sliding groove, the fixing block is provided with a fixing hole, the first connecting rod is provided with a hinge hole, and the first connecting rod and the fixing block are hinged by a pin. The pin passes through the hinge hole and the sliding groove in sequence and then engages with the fixing hole.

[0009] Furthermore, the snap-fit ​​part on the pull rod is a support bearing; the support bearing is used to realize the rotatable connection between the pull rod and the connecting piece.

[0010] Furthermore, the diameter of the support bearing is larger than the diameter of the tie rod.

[0011] In some embodiments, the snap-fit ​​portion on the pull rod can also be a disc with a diameter larger than that of the pull rod, which can achieve a clearance fit with the mounting hole on the connector.

[0012] Furthermore, the mounting holes on the connector are stepped holes, with a small outer diameter and a large inner diameter, which confines the snap-fit ​​part within the inner hole and allows for rotational movement.

[0013] Furthermore, the drive mechanism includes an electric motor, the output shaft of which is directly and fixedly connected to the lead screw. The electric motor drives the lead screw to rotate, and the lead screw then drives the connecting member to move horizontally. In some specific embodiments, the drive mechanism may include a gear, a worm gear, and an electric motor. The lead screw is fixedly connected to the gear, the gear meshes with the worm gear, and the worm gear is connected to the electric motor. Driven by the electric motor, the worm gear can drive the gear to rotate, and the gear in turn drives the lead screw to rotate. When the lead screw rotates, it drives the connecting member to move horizontally, and the connecting member then drives the pull rod to move horizontally. The movement of the pull rod changes the relative position of the fixed block, and the change in the position of the fixed block causes a displacement change in the first connecting rod, ultimately driving the blade shaft, which is fixedly connected to the second connecting rod, to rotate, that is, the angle of the blade changes.

[0014] This application also provides a hydroelectric power generation mechanism that uses the blade angle adjustment device described in this application, giving the hydroelectric power generation mechanism corresponding advantages.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The blade angle adjustment device in this application can achieve precise adjustment of the blade angle by setting a mounting base, a pull rod, a connecting piece, a lead screw and a drive mechanism. The structure is relatively simple, and the drive motor is set outside the hub and does not rotate with the hub, which makes the installation and maintenance of the motor more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the angle adjustment device in Embodiment 1 of this utility model;

[0017] Figure 2 This is a front view of the angle adjustment device in one working state in Embodiment 1 of this utility model;

[0018] Figure 3 This is a front view of the angle adjustment device in another working state in Embodiment 1 of this utility model;

[0019] Figure 4 This is an exploded schematic diagram of the angle adjustment device in Embodiment 1 of this utility model;

[0020] Figure 5 This is a schematic diagram of the angle adjustment device installed on the impeller mechanism in Embodiment 1 of this utility model;

[0021] Figure 6 This is another schematic diagram of the angle adjustment device installed on the impeller mechanism in Embodiment 1 of this utility model;

[0022] Figure 7 This is a schematic diagram of the installation of the angle adjustment device in Embodiment 2 of this utility model;

[0023] In the diagram: 1. Mounting base; 11. Sliding groove; 2. Tie rod; 21. Fixing block; 211. Fixing hole; 22. Snap-fit ​​part; 3. Linkage mechanism; 31. First connecting rod; 311. Hinge hole; 32. Second connecting rod; 33. Pin; 4. Connecting piece; 41. Screw hole; 5. Lead screw; 6. Motor; 71. Hub; 72. Blade; 73. End cover; 74. Main shaft; 75. Bushing; 8. Gear; 9. Worm gear. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art.

[0025] Example 1

[0026] like Figure 1-4 As shown, this embodiment provides a blade angle adjustment device for adjusting the blade angle 72 of an impeller mechanism, comprising: a mounting base 1, fixed in the impeller mechanism, the mounting base 1 having a cavity inside; a pull rod 2, disposed in the cavity of the mounting base 1, with a fixing block 21 disposed on the pull rod 2; the fixing block 21 moving back and forth with the pull rod 2 in the cavity of the mounting base 1; a snap-fit ​​part 22 disposed on one end of the pull rod 2; and a linkage mechanism 3, including a first link 31 and a second link 32, one end of the first link 31 being connected to... The fixed block 21 is connected, and the other end of the first connecting rod 31 is hinged to one end of the second connecting rod 32. The other end of the second connecting rod 32 is fixedly connected to the blade 72. The connector 4 is rotatably connected to the snap-fit ​​part 22 at one end and has a screw hole 41 at the other end. The lead screw 5 is fitted with the screw hole 41 at one end. The drive mechanism is connected to the other end of the lead screw 5. Under the action of the drive mechanism, the lead screw 5 rotates, thereby driving the connector 4 to move along the axial direction of the lead screw 5.

[0027] In this embodiment, the impeller mechanism includes a hub 71, and a ring of blades 72 is provided on the outer side of the hub 71. The mounting seat 1 is fixedly installed inside the hub 71. The blade 72 includes a blade shaft and a blade body. The end of the blade shaft passes through the hub 71 and is fixedly connected to the second connecting rod 32.

[0028] The hub 71 has end caps 73 and a main shaft 74 at its two ends, respectively. The main shaft 74 has a through hole in the middle, which allows the pull rod 2 to pass through. The main shaft 74 can be fixed in the water inlet pipe by a bushing 75. The connector 4 is disposed in the bushing 75, and the connector 4 cooperates with the limiting member in the bushing 75, so that the connector 4 can only move horizontally. That is, the connector 4 converts the rotational motion of the lead screw 5 into its own linear motion.

[0029] In this embodiment, the mounting base 1 is provided with a sliding groove 11, the fixing block 21 is provided with a fixing hole 211, the first connecting rod 31 is provided with a hinge hole 311, the first connecting rod 31 and the fixing block 21 are hinged by a pin 33, and the pin 33 passes through the hinge hole 311 and the sliding groove 11 in sequence and then engages with the fixing hole 211.

[0030] In this embodiment, the snap-fit ​​portion 22 on the pull rod 2 is a support bearing; and the diameter of the support bearing is larger than the diameter of the pull rod 2 itself. The pull rod 2 is rotatably connected to the connector 4 through the support bearing. The mounting hole on the connector 4 is a stepped hole, and the outer diameter of the stepped hole is small while the inner diameter is large, so that the snap-fit ​​portion 22 is confined in the inner hole and can rotate.

[0031] In this embodiment, the driving mechanism includes a motor 6, the output shaft of which is directly and fixedly connected to the lead screw 5. The motor 6 drives the lead screw 5 to rotate, and the lead screw 5 then drives the connecting member 4 to move horizontally.

[0032] like Figure 5-6 The diagram shown is a schematic of the blade angle adjustment device installed on the impeller mechanism in this embodiment. In actual use, when the blade angle 72 needs to be adjusted, the motor 6 is started to drive the lead screw 5 to rotate. The rotation of the lead screw 5 causes the connecting piece 4 to move back and forth. Since the locking part 22 of the pull rod 2 is connected to the connecting piece 4, the back-and-forth movement of the connecting piece 4 causes the pull rod 2 to move synchronously, thereby causing a change in the linkage mechanism 3 connected to the fixed block 21. Ultimately, this causes the second connecting rod 32 to drive the blade 72 to rotate. The changes in the corresponding components of the angle adjustment device during this process can be seen from… Figure 2 and Figure 3 This was directly observed in the comparison.

[0033] Example 2

[0034] like Figure 7 As shown, the main difference between this embodiment and Embodiment 1 is that the driving mechanism in this embodiment includes a gear 8, a worm gear 9, and a motor 6. The lead screw 5 is fixedly connected to the gear 8, the gear 8 meshes with the worm gear 9, and the worm gear 9 is connected to the motor 6. Under the drive of the motor 6, the worm gear 9 can drive the gear 8 to rotate, which in turn drives the lead screw 5 to rotate. When the lead screw 5 rotates, it drives the connecting piece 4 to move horizontally, and the connecting piece 4 then drives the pull rod 2 to move horizontally. The movement of the pull rod 2 causes the relative position of the fixed block 21 to change. The change in the position of the fixed block 21 causes the first connecting rod 31 to shift, ultimately causing the blade 72 to rotate, that is, the angle of the blade 72 changes.

[0035] The advantage of this embodiment is that the motor 6 can be installed independently above the water surface, which is more convenient for installation and maintenance compared to the method of installing the motor 6 in the bushing 75 in Embodiment 1.

[0036] Example 3

[0037] The main difference between this embodiment and Embodiment 1 is that in this embodiment, the snap-fit ​​part on the pull rod directly adopts a disc with a diameter larger than that of the pull rod. The disc is integrally formed with the pull rod, and the disc can be clearance-fitted with the mounting hole on the connector, thereby achieving a rotatable connection. Those skilled in the art can clearly understand the technical solution in this embodiment based on the textual description, therefore, no further drawings are provided.

[0038] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various combinations and modifications of the aforementioned technical features. Any improvements, modifications, equivalent substitutions, or applications of the structure or method of the present invention to other fields to achieve the same effect without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention.

Claims

1. A blade angle adjusting device for adjusting a blade angle of a vane mechanism, characterized by, The utility model relates to a kind of blade angle adjusting device, including: Mounting seat, fixed in impeller mechanism, and the cavity is arranged in the inside of mounting seat; Pull rod, be arranged in the inner cavity of mounting seat, and fixed block is arranged on pull rod;Fixed block moves back and forth in the inner cavity of mounting seat along with pull rod, and the side end of pull rod is provided with clamping part; Connecting rod mechanism, including first connecting rod and second connecting rod, one end of first connecting rod is connected with fixed block, the other end of first connecting rod is hinged with one end of second connecting rod, and the other end of second connecting rod is fixedly connected with blade; Connecting piece, one end of connecting piece is connected with the clamping part, and the other end of connecting piece is provided with screw hole; Lead screw, one end of lead screw is matched with the screw hole; Driving mechanism, driving mechanism is connected with the other end of lead screw;Driving mechanism is used to drive lead screw rotation, to drive connecting piece move along the axial direction of lead screw.

2. The blade angle adjustment device according to claim 1, characterized in that: The impeller mechanism includes a hub, a circle of blades is arranged outside the hub, and the mounting seat is fixedly installed in the inside of the hub;The blade includes a blade shaft and a blade body, and the end of the blade shaft is fixedly connected with the second connecting rod after penetrating through the hub.

3. The vane angle adjustment device of claim 2, wherein: The hub is provided with an end cover and a main shaft at both ends respectively, the main shaft is provided with a through hole in the middle, and the through hole facilitates the pull rod to penetrate through.

4. The blade angle adjustment device of claim 1, wherein: The mounting seat is provided with a sliding groove, the fixed block is provided with a fixed hole, the first connecting rod is provided with a hinged hole, and the first connecting rod is hinged with the fixed block by pin column, and the pin column is sequentially penetrated through the hinged hole, sliding groove and then matched with the fixed hole.

5. The blade angle adjustment device of claim 1, wherein: The clamping part on the pull rod is a support bearing;The support bearing is used to realize the rotatable connection of pull rod and connecting piece.

6. The vane angle adjustment device of claim 5, wherein: The diameter of the support bearing is greater than the diameter of the pull rod.

7. The vane angle adjustment device of claim 1, wherein: The clamping part on the pull rod is a disc with a diameter greater than the diameter of the pull rod.

8. The vane angle adjustment device of claim 1, wherein: The driving mechanism includes a motor, and the output shaft of the motor is directly fixedly connected with the lead screw.

9. The vane angle adjustment device of claim 1, wherein: The driving mechanism includes a gear, a worm and a motor, the lead screw is fixedly connected with the gear, the gear is engaged with the worm, and the worm is connected with the motor.

10. A hydroelectric power plant, characterized by: The blade angle adjusting device of any one of claims 1-9 is adopted.

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