A large vertical hydraulic turbine unit guide vane locking mechanism

Abstract

This invention belongs to the field of hydro turbine technology, specifically relating to a guide vane locking mechanism for a large vertical hydro turbine unit. It includes a support cover and a locking ring. Multiple guide vane shafts are rotatably connected to the support cover, and all guide vane shafts are rotatably connected to the same locking ring. A drive mechanism for driving the locking ring to move up and down is symmetrically installed on the support cover. A locking assembly for locking the guide vane shafts is installed on the locking ring. Multiple sliding rods for stabilizing the locking ring are installed on the support cover, and these sliding rods are slidably connected to the same locking ring. Caps for preventing the locking ring from sliding out are installed on the sliding rods. By locking the guide vane shafts through friction, it is possible to lock guide vanes at different opening degrees, especially in the fully closed or fully open state. This reduces the load on the push-pull rod in the locked state, thereby increasing the applicability, improving safety, and extending service life.

Description

Technical Field

[0001] This invention belongs to the field of water turbine technology, specifically relating to a guide vane locking mechanism for a large vertical water turbine unit. Background Technology

[0002] The function of the turbine's guide vane mechanism is to guide water flow into the runner, creating circulation that drives the runner to perform work and generate electricity. Different flow rates are needed to adjust the turbine's flow rate according to different load requirements, thus necessitating different guide vane openings. The guide vane opening is controlled by a control loop within the guide vane mechanism, operated by a speed governor and a relay. To lock the guide vanes at a specific angle, the locking position is typically set on the guide vane relay. However, the switching torque for guide vane relays in large units is very high. Setting a lock on the relay would necessitate a locking groove on the push-pull rod, which would affect the strength of the push-pull rod, reduce its service life, and also decrease safety. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the present invention proposes a guide vane locking mechanism for large vertical water turbine units.

[0004] The specific technical solution of the present invention is as follows: A guide vane locking mechanism for a large vertical turbine unit includes a support cover and a locking ring. Multiple guide vane shafts are rotatably connected to the support cover, and the multiple guide vane shafts are all rotatably connected to the same locking ring. A drive mechanism for driving the locking ring to move up and down is symmetrically installed on the support cover, and a locking component for locking the guide vane shafts is installed on the locking ring.

[0005] Furthermore, the support cover is equipped with multiple slide rods for securing the locking ring, and the multiple slide rods are slidably connected to the same locking ring. The slide rods are equipped with caps for preventing the locking ring from sliding out.

[0006] Furthermore, the locking assembly includes a locking boss and a locking sleeve. The locking boss is circumferentially arrayed on the locking ring, and a locking sleeve is installed on the guide vane shaft for locking the guide vane shaft in cooperation with the locking boss. The opposing surfaces of the locking boss and the locking sleeve are friction surfaces.

[0007] Furthermore, the locking sleeve is provided with a first helical tooth in a circumferential array, and the locking boss is provided with a second helical tooth in a circumferential array that cooperates with the first helical tooth.

[0008] Furthermore, the guide vane shaft is provided with a shaft step for supporting the locking sleeve.

[0009] Furthermore, the guide vane shaft is threaded with multiple locking bolts for locking the locking sleeve.

[0010] Furthermore, the locking assembly includes locking blocks, and multiple locking blocks are mounted on the locking ring. The guide vane shaft has locking grooves for cooperating with the locking blocks.

[0011] Furthermore, the drive mechanism includes a hydraulic cylinder, and the support cover is provided with a mounting platform for mounting the hydraulic cylinder, with the output end of the hydraulic cylinder mounted on a locking ring.

[0012] Beneficial effects:

[0013] This application features multiple guide vane shafts rotatably connected to a support cover, all rotatably connected to the same locking ring. A drive mechanism for moving the locking ring up and down is symmetrically mounted on the support cover. A locking assembly for locking the guide vane shafts is mounted on the locking ring. The drive mechanism drives the locking ring up and down, causing the locking ring to move the locking assembly up and down. When the locking assembly contacts the locking guide vane shaft, the friction between the locking assembly and the locking guide vane shaft locks the shaft, preventing rotation during maintenance. This eliminates the need for a locking groove on the push-pull rod, preserving its overall strength. Locking the guide vane shaft through friction allows for locking guide vanes at different opening degrees, especially in fully closed or fully open states. This reduces the load on the push-pull rod in the locked state, increasing its applicability, improving safety, and extending its service life. Attached image description:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the slide bar and cap structure of the present invention;

[0017] Figure 4 This is a schematic diagram of the locking assembly structure of the present invention;

[0018] Figure 5 This is a schematic diagram of the locking sleeve structure of the present invention;

[0019] Figure 6 This is a schematic diagram of the locking ring structure of the present invention;

[0020] Figure 7 This is a schematic diagram of the locking boss structure of the present invention;

[0021] Figure 8 This is a schematic diagram of the locking block structure of the present invention;

[0022] Figure 9 This is a schematic diagram of the locking groove structure of the present invention.

[0023] Explanation of markings in the diagram:

[0024] Support cover 1, locking ring 2, guide vane shaft 3, drive mechanism 4, hydraulic cylinder 411, placement platform 412, locking assembly 5, locking boss 511, locking sleeve 512, first helical tooth 513, second helical tooth 514, shaft step 515, locking bolt 516, locking block 521, locking groove 522, slide bar 6, cap 7. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0027] Example 1: Combination Figures 1 to 4 A guide vane locking mechanism for a large vertical turbine unit is described, comprising a support cover 1 and a locking ring 2. Multiple guide vane shafts 3 are rotatably connected to the support cover 1, and all multiple guide vane shafts 3 are rotatably connected to the same locking ring 2. A drive mechanism 4 for driving the locking ring 2 to move up and down is symmetrically installed on the support cover 1, and a locking component 5 for locking the guide vane shafts 3 is installed on the locking ring 2. This application features multiple guide vane shafts 3 rotatably connected to a support cover 1, all rotatably connected to the same locking ring 2. A drive mechanism 4 is symmetrically mounted on the support cover 1 to drive the locking ring 2 to move up and down. A locking assembly 5 for locking the guide vane shafts 3 is mounted on the locking ring 2. The drive mechanism 4 drives the locking ring 2 to move up and down, causing the locking ring 2 to drive the locking assembly 5 to move up and down. When the locking assembly 5 contacts the locking guide vane shaft 3, the friction between the locking assembly 5 and the locking guide vane shaft 3 locks the locking guide vane shaft 3, preventing rotation during maintenance. This eliminates the need for a locking groove on the push-pull rod, preserving its overall strength. By locking the guide vane shaft 3 through friction, it can lock guide vanes with different opening degrees, especially when the guide vanes are fully closed or fully open. This reduces the load on the push-pull rod in the locked state, increasing its applicability, improving safety, and extending its service life.

[0028] Example 2: Based on Example 1, combined with Figure 3As explained, the support cover 1 is equipped with a plurality of slide rods 6 for securing the locking ring 2. The plurality of slide rods 6 are slidably connected to the same locking ring 2, and caps 7 for limiting the sliding out of the locking ring 2 are installed on the slide rods 6. This application features multiple sliding rods 6 installed on a support cover 1 to stabilize the locking ring 2. All sliding rods 6 are slidably connected to the same locking ring 2. Caps 7 are installed on the sliding rods 6 to restrict the locking ring 2 from sliding out. The multiple sliding rods 6 can be welded or bolted to the support cover 1. The multiple sliding rods 6 pass through the locking ring 2, limiting its movement and preventing it from affecting the guide vane shaft 3. This makes the locking ring 2 more stable during vertical movement, increasing the locking force on the guide vane shaft 3. The caps 7 on the sliding rods 6 allow the locking ring 2 to slide into the multiple sliding rods 6 first, and then the caps 7 are installed on the sliding rods 6, restricting the locking ring 2 from sliding out from the top of the sliding rod 6. This makes the locking ring 2 more stable, increases the locking force, and makes the locking of the guide vane shaft 3 more secure.

[0029] Example 3: Based on Example 1, combined with Figures 5 to 7 As explained, the locking assembly 5 includes a locking boss 511 and a locking sleeve 512. The locking ring 2 is circumferentially arrayed with locking bosses 511, and the guide vane shaft 3 is equipped with a locking sleeve 512 for locking the guide vane shaft 3 in cooperation with the locking bosses 511. The opposing surfaces of the locking bosses 511 and the locking sleeve 512 are friction surfaces. This application features a locking boss 511 arranged in a circumferential array on a locking ring 2, and a locking sleeve 512 mounted on a guide vane shaft 3 for locking the guide vane shaft 3 in conjunction with the locking boss 511. The opposing surfaces of the locking boss 511 and the locking sleeve 512 are friction surfaces. By rubbing against the opposing surfaces of the locking boss 511 and the locking sleeve 512, the guide vane shaft 3 connected to the locking sleeve 512 is locked using frictional force. The locking boss 511 can be detachably mounted on the locking ring 2 by welding or bolts, and the locking sleeve 512 can be detachably mounted on the guide vane shaft 3 by welding or bolts. When the opposing surfaces of the locking boss 511 and the locking sleeve 512 are severely worn and fail, the locking boss 511 and the locking sleeve 512 can be replaced, thereby saving costs, facilitating maintenance, and improving safety.

[0030] Example 4: Based on Example 3, combined with Figure 4To illustrate, the locking sleeve 512 is provided with a circumferential array of first helical teeth 513, and the locking boss 511 is provided with a circumferential array of second helical teeth 514 that engage with the first helical teeth 513. This application, by providing a circumferential array of first helical teeth 513 on the locking sleeve 512 and a circumferential array of second helical teeth 514 on the locking boss 511 to engage with the first helical teeth 513, further enhances the locking force on the guide vane shaft 3, reduces the load on the push-pull rod, and improves safety by moving the locking ring 2 downwards.

[0031] Example 5: Based on Example 3, combined with Figure 5 As explained, the guide vane shaft 3 is provided with a shaft step 515 for supporting the locking sleeve 512. This application, by providing a shaft step 515 on the guide vane shaft 3 for supporting the locking sleeve 512, allows the locking sleeve 512 to be positioned during installation, facilitating its installation on the guide vane shaft 3. It also reduces the vertical load on the locking sleeve 512, preventing deformation during locking, thus facilitating installation, extending its service life, and improving safety.

[0032] Example 6: Based on Example 3, combined with Figure 5 As explained, the guide vane shaft 3 is threaded with a plurality of locking bolts 516 for locking the locking sleeve 512. This application utilizes the multiple locking bolts 516 threaded onto the guide vane shaft 3 to secure the locking sleeve 512, thereby facilitating replacement and maintenance and improving installation efficiency.

[0033] Example 7: Based on Example 1, combined with Figure 8 and Figure 9As explained, the locking assembly 5 includes a locking block 521, and multiple locking blocks 521 are installed on the locking ring 2. The guide vane shaft 3 has a locking groove 522 for cooperating with the locking block 521. This application features multiple locking blocks 521 mounted on a locking ring 2. A locking groove 522 for engaging with the locking blocks 521 is provided on the guide vane shaft 3. When the locking ring 2 moves upward, it causes the locking blocks 521 to move out of the locking groove 522. Without the restriction of the locking blocks 521, the guide vane shaft 3 can rotate to change its opening angle. Then, the locking ring 2 causes the locking blocks 521 to move downward, inserting them into the locking groove 522. The locking blocks 521 can be installed on the locking ring 2 by welding or bolting, facilitating replacement. The top of the locking groove 522 is rounded to allow the locking blocks 521 to slide into it. By restricting the rotation of the guide vane shaft 3 with the locking blocks 521, the locking force is increased, making the locking of the guide vane shaft 3 more secure and thus improving safety.

[0034] Example 8: Based on Example 1, combined with Figure 2 As explained, the driving mechanism 4 includes a hydraulic cylinder 411, and the support cover 1 is provided with a mounting platform 412 for mounting the hydraulic cylinder 411. The output end of the hydraulic cylinder 411 is mounted on the locking ring 2. This application, by providing a mounting platform 412 for mounting the hydraulic cylinder 411 on the support cover 1 and mounting the output end of the hydraulic cylinder 411 on the locking ring 2, prevents the hydraulic cylinder 411 from shaking when driving the locking ring 2 to move up and down, thereby improving the stability of the locking ring 2 during movement, increasing the locking strength, extending its service life, and improving safety.

[0035] Work process:

[0036] When locking the guide vane shaft 3, the hydraulic cylinder 411 is activated to retract, causing the hydraulic cylinder 411 to drive the locking ring 2 to move downward. The locking ring 2, through multiple locking bosses 511, drives the first helical tooth 513 to move downward, so that the first helical tooth 513 engages with the second helical tooth 514 on the locking sleeve 512. Through the mutual restraint between the first helical tooth 513 and the second helical tooth 514, the guide vane shaft 3 is locked, preventing the guide vane shaft 3 from rotating. This simplifies operation, facilitates production and processing, and improves safety.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A large vertical hydraulic turbine unit guide vane locking mechanism, characterized by, Includes a support cover (1) and a locking ring (2). Multiple guide vane shafts (3) are rotatably connected to the support cover (1). The multiple guide vane shafts (3) are all rotatably connected to the same locking ring (2). A drive mechanism (4) for driving the locking ring (2) to move up and down is symmetrically installed on the support cover (1). A locking assembly (5) for locking the guide vane shafts (3) is installed on the locking ring (2). The locking assembly (5) includes a locking boss (511) and a locking sleeve (512). The locking ring (2) is circumferentially arrayed with locking bosses (511). The guide vane shaft (3) is equipped with a locking sleeve (512) for locking the guide vane shaft (3) in cooperation with the locking bosses (511). The opposing surfaces of the locking bosses (511) and the locking sleeves (512) are friction surfaces.

2. The guide vane locking mechanism of a large vertical hydro-turbine unit according to claim 1, characterized in that, The support cover (1) is equipped with a plurality of slide rods (6) for securing the locking ring (2), and the plurality of slide rods (6) are slidably connected to the same locking ring (2). The slide rods (6) are equipped with caps (7) for limiting the sliding out of the locking ring (2).

3. The guide vane locking mechanism of a large vertical hydro-turbine unit according to claim 1, characterized in that, The locking sleeve (512) is provided with a first helical tooth (513) arranged in a circumferential array, and the locking boss (511) is provided with a second helical tooth (514) arranged in a circumferential array to cooperate with the first helical tooth (513).

4. The guide vane locking mechanism for a large vertical hydro turbine unit according to claim 1, characterized in that, The guide vane shaft (3) is provided with a shaft step (515) for supporting the locking sleeve (512).

5. The guide vane locking mechanism for a large vertical hydro turbine unit according to claim 1, characterized in that, The guide vane shaft (3) is threaded with a plurality of locking bolts (516) for locking the locking sleeve (512).

6. The guide vane locking mechanism for a large vertical hydro turbine unit according to claim 1, characterized in that, The drive mechanism (4) includes a hydraulic cylinder (411), and the support cover (1) is provided with a placement platform (412) for mounting the hydraulic cylinder (411). The output end of the hydraulic cylinder (411) is mounted on the locking ring (2).

7. A guide vane locking mechanism for a large vertical hydro turbine unit, characterized in that, Includes a support cover (1) and a locking ring (2). Multiple guide vane shafts (3) are rotatably connected to the support cover (1). The multiple guide vane shafts (3) are all rotatably connected to the same locking ring (2). A drive mechanism (4) for driving the locking ring (2) to move up and down is symmetrically installed on the support cover (1). A locking assembly (5) for locking the guide vane shafts (3) is installed on the locking ring (2). The locking assembly (5) includes a locking block (521), and a plurality of locking blocks (521) are installed on the locking ring (2). The guide vane shaft (3) has a locking groove (522) for cooperating with the locking block (521).

8. A guide vane locking mechanism for a large vertical hydro turbine unit according to claim 7, characterized in that, The support cover (1) is equipped with a plurality of slide rods (6) for securing the locking ring (2), and the plurality of slide rods (6) are slidably connected to the same locking ring (2). The slide rods (6) are equipped with caps (7) for limiting the sliding out of the locking ring (2).

9. A guide vane locking mechanism for a large vertical hydro turbine unit according to claim 7, characterized in that, The drive mechanism (4) includes a hydraulic cylinder (411), and the support cover (1) is provided with a placement platform (412) for mounting the hydraulic cylinder (411). The output end of the hydraulic cylinder (411) is mounted on the locking ring (2).

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