Hydraulic turbine guide vane rotating structure

Abstract

The utility model provides a kind of water turbine base guide vane rotating structure, including lower connecting ring and upper connecting ring, the bottom of upper connecting ring is provided with mounting ring seat, the blade main body of annular array is rotatably installed between mounting ring seat and lower connecting ring, installation space is formed between mounting ring seat and upper connecting ring, angle adjusting mechanism is provided in installation space, for synchronously adjusting the angle of all blade main body. By setting mounting ring seat in upper connecting ring, and forming built-in installation space, angle adjusting mechanism is set in installation space, avoid the external space occupied by external adjustment mechanism, it is favorable for the installation and maintenance of water turbine upper structure such as generator, top cover etc., simultaneously, through the reverse package structure of dish ring, it can play good protective effect to adjustment mechanism, significantly improve the operation reliability and service life of adjustment system.

Description

Technical Field

[0001] This utility model relates to the field of water turbine technology, and in particular to a rotating structure for water turbine base guide vanes. Background Technology

[0002] The turbine housing ring is an important component of the turbine, mainly used to support the main shaft and runner. At the same time, the internal fixed guide vanes can guide the water flow evenly into the runner, improving operating efficiency. It is usually located on the side of the turbine and needs to withstand a lot of hydraulic and mechanical loads, so it requires high structural strength, durability and stability.

[0003] Currently, most commonly used guide vanes employ a fixed angle. The angle of the guide vane is determined during manufacturing and cannot be adjusted. While this design is simple in structure, it presents significant problems in practical use: when the turbine's operating head or flow rate changes, the fixed guide vane angle cannot adapt, leading to poorer flow conditions and reduced efficiency. Replacing guide vanes with different angles requires stopping the turbine for disassembly, which is extremely troublesome and consumes a significant amount of time and manpower.

[0004] To address this issue, some improved designs have adopted adjustable guide vanes. However, most existing adjustment mechanisms are installed above the turbine base ring, which not only occupies space and affects the installation and maintenance of upper equipment such as generators, but also exposes the adjustment components, making them susceptible to moisture, oil contamination, and mechanical impact. Therefore, a rotating guide vane structure for turbine base rings is proposed to solve the above problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a rotating structure for the guide vanes of a water turbine base, which solves the problem that most existing adjustment mechanisms are installed above the base ring, which not only takes up space and affects the installation and maintenance of upper equipment such as generators, but also exposes the adjustment components, making them easy to damage and resulting in poor reliability.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rotating structure for water turbine base guide vanes, including a lower connecting ring and an upper connecting ring. A mounting ring seat is provided at the bottom of the upper connecting ring. A ring array of blade bodies is rotatably mounted between the mounting ring seat and the lower connecting ring. An installation space is formed between the mounting ring seat and the upper connecting ring. An angle adjustment mechanism is provided in the installation space for synchronously adjusting the angle of all blade bodies.

[0007] In a preferred embodiment, the mounting ring seat includes a connecting sleeve disposed within the inner ring of the upper connecting ring and extending downward, with a disc ring disposed at the bottom of the connecting sleeve.

[0008] In a preferred embodiment, the disc ring includes a ring plate and a reverse-wrapping ring disposed on the outer ring of the ring plate and extending upward to form a reverse-wrapping structure.

[0009] In the preferred embodiment, rotating holes are symmetrically arranged on opposite sides of the lower connecting ring and the disc ring, and the rotating holes are close to the inner rings of both. Rotating shafts are provided at both the upper and lower ends of the blade body on the side close to the inner ring, and the rotating shafts are rotatably connected to the corresponding rotating holes.

[0010] In the preferred embodiment, the ring plate is provided with a groove corresponding to the blade body, and the top of the blade body is provided with an adjusting rod that moves through the groove. In the preferred embodiment, the angle adjustment mechanism includes a rotating ring rotatably disposed outside the connecting sleeve. The rotating ring is provided with adjustment grooves that correspond one by one to the slide grooves, for pushing the adjustment rod to move along the slide grooves. The top end of the adjustment rod is in movable engagement with the adjustment groove.

[0011] In a preferred embodiment, the angle adjustment mechanism further includes a rotary drive device for driving the rotating ring to rotate. The drive device includes a toothed ring disposed on the outer ring of the rotating ring and one or more output devices disposed on the disc ring. The output shaft of the output device is provided with a transmission gear that meshes with the toothed ring.

[0012] In a preferred embodiment, a rotary locking mechanism is also included, which may be one or more. The rotary locking mechanism includes a support base, a groove on the side of the support base near the rotating ring, a guide rod with two columns in the groove, a lifting locking block movably mounted on the guide rod, a locking tooth that matches the toothed ring on the side of the lifting locking block near the rotating ring, a return spring located at the bottom of the lifting locking block being mounted on the outside of the guide rod, and a telescopic cylinder installed on the top of the support base, the telescopic end of the telescopic cylinder moving through the support base and abutting against the lifting locking block.

[0013] In the preferred embodiment, a connecting rod located between adjacent blade bodies is also provided between the lower connecting ring and the inner ring of the disc ring.

[0014] This utility model provides a rotating structure for the guide vanes of a water turbine base. By setting an installation ring seat inside the upper connecting ring and forming a built-in installation space, the angle adjustment mechanism is set in the installation space, avoiding the external space occupied by the external adjustment mechanism. This is beneficial for the installation and maintenance of the upper structure of the water turbine, such as the generator and the top cover. At the same time, the reverse wrapping structure of the disc ring can provide good protection for the adjustment mechanism, significantly improving the operational reliability and service life of the adjustment system. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the upper connecting ring and mounting ring seat of this utility model; Figure 3 This is a utility model Figure 1 Exploded structure diagram; Figure 4 This is a structural diagram of the disc ring of this utility model; Figure 5 This is a utility model Figure 4 Top view of the structure; Figure 6 This is a structural diagram of the blade of this utility model; Figure 7 This is a structural diagram of the rotating ring of this utility model; Figure 8 This is a partial structural cross-sectional view of this utility model; Figure 9 This is a structural diagram of the connection between the rotating ring and the rotating locking mechanism of this utility model; Figure 10 This is a structural diagram of the rotary locking mechanism of this utility model; Figure 11 This is a utility model Figure 10 Exploded structure diagram.

[0016] In the diagram: Lower connecting ring 1; Upper connecting ring 2; Mounting ring seat 3; Connecting sleeve 301; Disc ring 302; Slide groove 303; Blade body 4; Rotating shaft 402; Adjusting rod 403; Angle adjustment mechanism 5; Rotating ring 501; Adjusting groove 502; Gear ring 503; Output device 504; Transmission gear 505; Rotary locking mechanism 6; Support seat 601; Guide rod 602; Lifting lock block 603; Locking tooth 604; Return spring 605; Telescopic cylinder 606; Connecting rod 7. Detailed Implementation

[0017] like Figure 1-11 As shown, a rotating structure for a water turbine base guide vane includes a lower connecting ring 1, an upper connecting ring 2, a mounting ring seat 3, a blade body 4, and an angle adjustment mechanism 5.

[0018] The mounting ring seat 3 includes a connecting sleeve 301 that is disposed in the inner ring of the upper connecting ring 2 and extends downward. A disc ring 302 is disposed at the bottom of the connecting sleeve 301. The upper connecting ring 2, the connecting sleeve 301 and the disc ring 302 are integrally formed. The disc ring 302 includes an integrally formed ring plate and a reverse wrapping ring. The reverse wrapping ring is disposed in the outer ring of the ring plate and extends upward to form a reverse wrapping structure, thereby forming an installation space for the angle adjustment mechanism 5. The angle adjustment mechanism 5 can be installed between the disc ring 302 and the upper connecting ring 2, and the shape of the disc ring 302 provides protection for it, while not affecting the installation of the upper structure of the turbine base.

[0019] There are multiple blade bodies 4, and the ring array is rotated between the disc ring 302 and the lower connecting ring 1. The lower connecting ring 1 and the disc ring 302 are symmetrically provided with rotating holes 101 for mounting the blade bodies 4 on opposite sides. The rotating holes 101 are close to the inner rings of the two. Bearings are provided in the rotating holes 101. The upper and lower ends of the blade body 4 near the inner ring are provided with rotating shafts 402 that are rotatably connected to the rotating holes 101, so that the blade body 4 can rotate around the rotating shafts 402 as the central axis, thereby adjusting its angle.

[0020] The disc ring 302 has a groove 303 on its ring plate that corresponds to the blade body 4. The extension direction of the groove 303 is adapted to the swing direction of the blade body 4. The top of the blade body 4 is provided with an adjusting rod 403 that moves through the groove 303, so that the adjusting rod 403 can slide in the groove 303, thereby driving the blade body 4 to rotate around the pivot 402.

[0021] The angle adjustment mechanism 5 includes a rotating ring 501 rotatably disposed outside the connecting sleeve 301. The connection between the two is provided with a concave-convex fit structure and a bearing is installed (not shown in the figure) to ensure the stability of its in-situ rotation. The rotating ring 501 is provided with adjustment grooves 502 that correspond one by one to the slide grooves 303. The top end of the adjusting rod 403 is movably engaged with the adjustment groove 502 to push the adjusting rod 403 to move along the slide groove 303. Thus, when the rotating ring 501 rotates, the adjustment grooves 502 on it make a circular motion with the ring. Since the top end of the adjusting rod 403 is movably constrained within the adjustment groove 502, it can swing within the range allowed by the slide groove 303, thereby changing the angle of the blade body 4.

[0022] The angle adjustment mechanism 5 also includes a rotary drive device for driving the rotating ring 501 to rotate. It includes a toothed ring 503 disposed on the outer ring of the rotating ring 501 and one or more output devices 504 disposed on the disc ring 302. In this embodiment, there are three output devices 504, which are evenly distributed on the outside of the rotating ring 501. They are composed of a motor and a reducer. The output shaft of the output device 504 is provided with a transmission gear 505 that meshes with the toothed ring 503. The rotating ring 501 can be rotated by driving the output device 504.

[0023] In a preferred embodiment, a rotary locking mechanism 6 is also included, which may be one or more. In this embodiment, there are three rotary locking mechanisms 6, which are evenly arranged outside the rotating ring 501. Each rotary locking mechanism 6 includes a support base 601. The support base 601 has a groove on the side near the rotating ring 501, and two guide rods 602 with uprights are arranged in the groove. A lifting locking block 603 is movably mounted on the guide rod 602. The lifting locking block 603 has a locking tooth 604 that matches the toothed ring 503 of the rotating ring 501 on the side near the toothed ring 503. A return spring 605 located at the bottom of the lifting locking block 603 is mounted on the outside of the guide rod 602. A telescopic cylinder 606 is installed on the top of the support base 601. The telescopic cylinder 606 may be one of a hydraulic cylinder, an electric cylinder, or a pneumatic cylinder. The telescopic end of the telescopic cylinder 606 moves through the support base 601 and abuts against the lifting locking block 603. The telescopic cylinder 606 is located between the two guide rods 602 to avoid unnecessary conflict with them.

[0024] This design allows for locking of the rotating ring 501 through the meshing relationship between the locking teeth 604 and the toothed ring 503, thus ensuring the stability of the blade body 4 during normal use. Simultaneously, when the angle of the blade body 4 needs adjustment, the extension of the telescopic cylinder 606 pushes the lifting lock block 603 and locking teeth 604 away from the toothed ring 503 and compresses the return spring 605, achieving unlocking. When the telescopic cylinder 606 retracts, the return spring 605 resets the lifting lock block 603, and the locking teeth 604 mesh with the toothed ring 503, ensuring the stability of the blade body 4 during use.

[0025] In the preferred embodiment, a connecting rod 7 located between adjacent blade bodies 4 is also provided between the lower connecting ring 1 and the inner ring of the disc ring 302, thereby reinforcing the overall structure and preventing swaying.

[0026] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A rotating structure for guide vanes of a water turbine base, comprising a lower connecting ring (1) and an upper connecting ring (2), characterized in that: The bottom of the upper connecting ring (2) is provided with a mounting ring seat (3), and the blade body (4) of the ring array is rotatably mounted between the mounting ring seat (3) and the lower connecting ring (1). An installation space is formed between the mounting ring seat (3) and the upper connecting ring (2), and an angle adjustment mechanism (5) is provided in the installation space for synchronously adjusting the angle of all blade bodies (4). The mounting ring seat (3) includes a connecting sleeve (301) disposed in the inner ring of the upper connecting ring (2) and extending downward, and a disc ring (302) is provided at the bottom of the connecting sleeve (301). The disc ring (302) includes a ring plate and a reverse ring disposed on the outer ring of the ring plate and extending upward to form a reverse wrapping structure; The ring plate is provided with a sliding groove (303) corresponding to the blade body (4), and the top of the blade body (4) is provided with an adjusting rod (403) that can move through the sliding groove (303). The angle adjustment mechanism (5) includes a rotating ring (501) rotatably disposed outside the connecting sleeve (301). The rotating ring (501) is provided with adjustment grooves (502) corresponding to the slide grooves (303) one by one, which are used to push the adjustment rod (403) to move along the slide grooves (303). The top end of the adjustment rod (403) is in active cooperation with the adjustment groove (502).

2. The turbine base guide vane rotating structure according to claim 1, characterized in that: The lower connecting ring (1) and the disc ring (302) are symmetrically provided with rotating holes (101) on opposite sides, and the rotating holes (101) are close to the inner rings of the two. The blade body (4) is provided with rotating shafts (402) at both ends on the side close to the inner ring. The rotating shafts (402) are rotatably connected to the corresponding rotating holes (101).

3. The turbine base guide vane rotating structure according to claim 1, characterized in that: The angle adjustment mechanism (5) also includes a rotary drive device for driving the rotating ring (501) to rotate. It includes a toothed ring (503) disposed on the outer ring of the rotating ring (501) and one or more output devices (504) disposed on the disc ring (302). The output shaft of the output device (504) is provided with a transmission gear (505) that meshes with the toothed ring (503).

4. The turbine base guide vane rotating structure according to claim 3, characterized in that: It also includes a rotary locking mechanism (6), which may be one or more. The rotary locking mechanism (6) includes a support base (601). The support base (601) has a groove on the side near the rotating ring (501). The groove contains a guide rod (602) with two columns. A lifting locking block (603) is movably mounted on the guide rod (602). The lifting locking block (603) has a locking tooth (604) that matches the toothed ring (503) of the rotating ring (501) on the side near the toothed ring (503). A return spring (605) located at the bottom of the lifting locking block (603) is mounted on the outside of the guide rod (602). A telescopic cylinder (606) is installed on the top of the support base (601). The telescopic end of the telescopic cylinder (606) moves through the support base (601) and abuts against the lifting locking block (603).

5. The turbine base guide vane rotating structure according to claim 2, characterized in that: A connecting rod (7) located between adjacent blade bodies (4) is also provided between the lower connecting ring (1) and the inner ring of the disc ring (302).

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