A special movable guide vane adjustment device for hydro turbine generator sets

Abstract

This utility model discloses a special movable guide vane adjustment device for hydro-generator sets. Utilizing the jacking force, the crank arm is pulled counterclockwise, causing the movable guide vane to rotate to a position aligned with the connecting rod pin. This solves the connection difficulty caused by angular deviation between the guide vane and the connecting rod, improving the efficiency of unit installation and maintenance. The device includes a tray with a connecting end and a guide rail end. The connecting end is connected to the crank arm via a positioning pin. A sliding frame is fitted onto the guide rail end, and one end of a pull rod is fixed to the side of the sliding frame away from the connecting end. A jack is installed inside the sliding frame. The pull rod is fixed to the double-arm head of the hydro-generator via a connecting plate. The pull rod has multiple square slots, and the other end of the pull rod passes through the radial through hole of the second pin. A wedge plate is inserted into the square slot to limit the pull rod's position. The second pin connects to one end of the connecting plate, and a side hole is provided on one end of the connecting plate.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station maintenance technology, and in particular to a special movable guide vane adjustment device for hydro turbine generator sets. Background Technology

[0002] The movable guide vanes of a hydro-generator unit are one of the important components for adjusting the generator's output. During unit operation, the generator's output adjustment system consists of a servo drive, speed regulating ring, connecting rod, crank arm, and movable guide vanes. The crank arm is mounted on the upper end of the movable guide vane and assembled into a single unit using pins. The speed regulating ring rotates around the main shaft under the action of the servo drive, driving the connecting rod and pushing the crank arm and movable guide vane to rotate, controlling the water flow through the runner by adjusting the opening of the movable guide vane, thereby controlling the generator's output. During unit maintenance, it is necessary to remove components such as the crank arm, lift out the movable guide vane, replace the seal, and measure the wear of the shaft pins at both ends. During the reinstallation of the movable guide vane, it is placed with the ease of lifting other components in mind, resulting in a disordered relative position. After the speed regulating ring and other components are installed, the pin holes of the crank arm and connecting rod cannot be aligned, requiring adjustment of the movable guide vane angle to ensure the correct insertion of the shaft pin.

[0003] The traditional adjustment method involves striking the side of the crank arm installed on the movable guide vane with a 10-pound hammer, causing the movable guide vane to rotate under the impact force until the pin hole on the crank arm aligns with the connecting rod pin hole. In a typical hydroelectric plant, each machine has multiple movable guide vanes. This adjustment method is not only labor-intensive and inefficient, but also time-consuming and labor-intensive, and may cause damage to adjacent components, posing a significant safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by disclosing a special movable guide vane adjustment device for hydro turbine generator sets. By using the jacking force, the crank arm is pulled to rotate counterclockwise, which drives the movable guide vane to rotate to the position aligned with the connecting rod shaft pin, thereby solving the problem of connection difficulties caused by angular deviation between the guide vane and the connecting rod and improving the efficiency of unit installation and maintenance.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a special movable guide vane adjustment device for hydro-generator sets, including a tray, the tray including a connecting end and a guide rail end, the connecting end being connected to the crank arm through a positioning shaft pin, a sliding frame being sleeved on the guide rail end and slidingly engaging with it, one end of a pull rod being fixed on the side of the sliding frame away from the connecting end, a jack being provided inside the sliding frame, and the pull rod being fixed to the double boom head of the hydro-generator through a connecting plate;

[0006] The pull rod is provided with multiple square grooves, and the other end of the pull rod passes through the radial through hole of the second shaft pin. The pull rod is limited by inserting a wedge plate into the square groove. The second shaft pin is connected to one end of the connecting plate, and a side hole is opened on one end of the connecting plate.

[0007] In a preferred embodiment of this utility model, the connecting end includes a vertical plate, and two opposing clamping arms are welded to the inner side of the vertical plate. The two clamping arms are provided with pin holes, and the clamping arms are fixedly connected to the crank arm by a shaft pin.

[0008] In a preferred embodiment of this utility model, the guide rail end includes a base plate, one end of which is welded to the outer side of the first vertical plate, guide rails are welded to both sides of the base plate, and the other end of the base plate is welded to the second vertical plate.

[0009] In a preferred embodiment of this utility model, the sliding frame includes end plates arranged opposite each other, and the two end plates are connected by two opposite connecting rods. A connecting hole is provided on the end plate at the end that is fixed to the pull rod, and it is fixedly connected to the pull rod by a connecting piece.

[0010] In a preferred embodiment of this utility model, the jack includes a fixed end and a movable end. The fixed end is in contact with an end plate near the connecting end, and the movable end is in contact with a vertical plate.

[0011] In a preferred embodiment of this utility model, the other end of the connecting plate is fixed to the adjacent double boom of the water turbine by a chuck. The chuck is provided with a limiting block that cooperates with the double boom of the water turbine, and the chuck is provided with multiple screw holes in the circumference.

[0012] In a preferred embodiment of this utility model, the other end of the connecting plate is provided with a plurality of circumferential grooves that mate with the screw holes, and the other end of the connecting plate is fixed to the screw holes by a shaft pin.

[0013] In a preferred embodiment of this utility model, the jack is a screw jack.

[0014] In a preferred embodiment of this utility model, the top of the wedge plate is provided with a wedge-pulling hole.

[0015] In a preferred embodiment of this utility model, a first washer is provided between the pull rod and the wedge plate, and a set bolt and a second washer are also provided between the circumferential groove and the screw hole.

[0016] This utility model has the following advantages compared with the prior art:

[0017] 1. Precise adjustment to improve guide vane alignment accuracy

[0018] Multi-level limiting mechanism: Multiple square grooves on the tie rod cooperate with the wedge plate to achieve graded fine adjustment of the guide vane angle, ensuring precise alignment between the movable guide vane and the connecting rod shaft pin;

[0019] Mechanical constraint guarantee: The linear sliding cooperation between the tray guide rail and the slide frame restricts the adjustment direction, eliminates human operation error, and improves the consistency of adjustment repeatability;

[0020] 2. Effortless and efficient operation

[0021] Lever mechanics optimization: The sliding frame and the pull rod form a lever system. The linear motion of the jack is amplified into the rotational torque of the crank arm through the lever, realizing a small force to drive a large torque. The adjustment operation can be completed by a single person, shortening downtime for maintenance and avoiding incomplete adjustment due to insufficient force during manual adjustment.

[0022] 3. The structure is stable, ensuring safety during the adjustment process.

[0023] Wedge plate limit anti-reverse: After the wedge plate is inserted into the square groove, it effectively locks the position of the pull rod.

[0024] This device solves the problems of low precision, poor efficiency, and insufficient safety in traditional guide vane adjustment methods. It is particularly suitable for scenarios where the guide vane and connecting rod pin have angular deviations due to manufacturing errors or long-term operation. By precisely adjusting the guide vane angle, the unit's operating efficiency can be significantly improved, vibration and wear caused by poor connections can be reduced, and the service life of the equipment can be extended, thus ensuring the safe and stable operation of the hydropower station. Attached Figure Description

[0025] Figure 1 This is an installation diagram of the present invention;

[0026] Figure 2 for Figure 1 AA section view;

[0027] Figure 3 This is a cross-sectional view of the present invention;

[0028] Figure 4 This is a schematic diagram of the tray structure;

[0029] Figure 5 This is a schematic diagram of the sliding frame structure;

[0030] Figure 6 This is the front view of the pull rod;

[0031] Figure 7 This is a schematic diagram of the structure of the second axle pin;

[0032] Figure 8 This is a sectional view of the shaft pin 1;

[0033] Figure 9 This is the front view of the wedge plate;

[0034] Figure 10 This is a schematic diagram of the connecting plate structure;

[0035] Figure 11 This is a schematic diagram of the chuck's structure.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Pallet; 2. Shaft pin one; 3. Sliding frame; 4. Jack; 5. Connecting piece; 6. Shaft pin two; 7. Washer one; 8. Wedge plate; 9. Tie rod; 10. Connecting plate; 11. Set bolt; 12. Shaft pin three; 13. Washer two; 14. Chuck.

[0038] 101. Connecting end; 102. Guide rail end;

[0039] 301. End plate; 302. Connecting hole; 303. Connecting rod;

[0040] 601. Radial through hole;

[0041] 901, square groove;

[0042] 1001, side hole; 1002, circumferential groove;

[0043] 1401, screw hole; 1402, limit block. Detailed Implementation

[0044] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0045] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0046] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0047] like Figures 1-11 The figure shows a specific embodiment of the present invention;

[0048] like Figures 1-11As shown, this utility model discloses a special movable guide vane adjustment device for a hydro-generator set, including a tray 1. The tray 1 includes a connecting end 101 and a guide rail end 102. The connecting end 101 is connected to the crank arm through a positioning shaft pin. A sliding frame 3 is sleeved on the guide rail end 102 and slides therewith. One end of a pull rod 9 is fixed on the side of the sliding frame 3 away from the connecting end 101. A jack 4 is provided inside the sliding frame 3. The pull rod 9 is fixed to the double boom head of the hydro-generator through a connecting plate 10.

[0049] The pull rod 9 is provided with a plurality of square grooves 901. The other end of the pull rod 9 passes through the radial through hole 601 of the second shaft pin 6. The pull rod 9 is limited by inserting the wedge plate 8 into the square groove 901. The second shaft pin 6 is connected to one end of the connecting plate 10. A side hole 1001 is opened on one end of the connecting plate 10.

[0050] The working principle of this utility model is as follows: Figures 1-2 As shown, after connecting the devices into one unit, crank the jack handle. The jack pushes out and pushes the slide frame and tray to produce relative movement, converting the pressure of the jack pushing outward into the pulling force required for adjusting the movable guide vane. The "L1" distance shortens, and the "L2" distance also shortens accordingly under the drive of the slide frame. Pull the crank arm to rotate. If the adjustment angle of the movable guide vane is too large and the jack cannot meet the adjustment requirements in its full stroke state, the square groove on the pull rod can be used to shorten the size of the jack placement position. After positioning with a wedge plate, repeat the above operation until the crank arm and the hole on the connecting rod are aligned to complete the adjustment work of the single movable guide vane connection. Pull out pin one, pin two, and pin three, and install the assembled triangular structure and tray into the corresponding pin holes in sequence. Then, perform the corresponding operations according to the above steps to complete the connection work of all connecting rods and corresponding crank arm holes in sequence.

[0051] Specifically, this device utilizes the force of a jack to pull the crank arm counterclockwise, thereby causing the movable guide vane to rotate and align with the connecting rod pin for easy connection. The connecting end of the tray is fixed to the crank arm of the turbine, and a sliding frame is fitted onto the tray. The first end of a pull rod is connected to the sliding frame, and the tail end of the pull rod is fixed to the double-arm head of the turbine via a connecting plate. A jack is installed inside the sliding frame. When the jack is activated, it pushes the sliding frame to move on the guide rail. The pull rod, fixed to the double-arm head, forms a fixed fulcrum, causing the entire pull rod to be under tension, which exerts a force (pull) on the sliding frame. During the jacking process, the crank arm is pulled, thereby causing the movable guide vane connected to the crank arm to rotate and align with the connecting rod pin for easy connection. The square grooves on the pull rod are for adjusting the rotation angle range of the guide vane. The angle range is determined by the spacing of the square grooves on the pull rod; the more square grooves, the higher the adjustment accuracy. This device is suitable for adjusting guide vanes of different specifications; only the pull rod of the corresponding length needs to be replaced.

[0052] Preferred, such as Figures 1-4As shown, the connecting end 101 includes a vertical plate, and two opposing clamping arms are welded to the inner side of the vertical plate. The two clamping arms are provided with pin holes, and the clamping arms are fixedly connected to the crank arm through a shaft pin 2.

[0053] The tray is fixed to the crank arm by the pivot pin 2 and connected as a whole. The tray 1 can drive the crank arm to rotate by the pivot pin 2. Considering that the crank arms on the movable guide vane have been installed and the connecting rod has been installed on the speed regulating ring when adjusting the angle of the movable guide vane, a stepped surface is designed at the connection end of the tray, that is, the clamping arm is set opposite to it. This ensures that when adjusting with this device, there will be no interference with the connecting rod, crank arms and other components.

[0054] Preferred, such as Figure 4 As shown, the guide rail end 102 includes a base plate, one end of which is welded to the outer side of the first vertical plate, guide rails are welded to both sides of the base plate, and the other end of the base plate is welded to the second vertical plate.

[0055] The sliding frame is fitted onto the guide rail and can slide on the guide rail. The guide rail is symmetrically arranged, with two guide rails set on both sides of the base plate to form a "double-point guide". This effectively resists the lateral force generated by the jack's eccentric ejection of the sliding frame. The vertical plate is the force point for the jack's ejection, causing the sliding frame to move relative to the guide rail. This causes the pull rod to be stressed, pulling the crank arm to rotate counterclockwise, thereby adjusting the guide vane angle.

[0056] Preferred, such as Figure 4 As shown, the sliding frame 3 includes two end plates 301 arranged opposite each other. The two end plates 301 are connected by two opposite connecting rods 303. The end plate 301 that is fixed to the pull rod 9 has a connecting hole 302, which is fixedly connected to the pull rod 9 by a connector 5.

[0057] The sliding frame 3 has connecting rods 303 machined on both sides to connect the front and rear end plates 301. A φ32 connecting hole 302 is machined on one end plate for mounting the tie rod 9. A connector 5 is used to fix the tie rod 9 to the end plate 301 of the sliding frame 3. The connector 5 can be of various types, commonly including bolts and pins. Taking a bolt connection as an example, the bolt passes through the connecting hole 302 and the corresponding hole on the tie rod 9, and is then tightened with a nut, thus firmly fixing the tie rod 9 to the sliding frame 3.

[0058] The sliding frame 3, through the ingenious combination of end plate 301, connecting rod 303, connecting hole 302 and pull rod 9, forms a stable frame that can accurately transmit force and motion.

[0059] Preferred, such as Figures 1-3 As shown, the jack 4 includes a fixed end and a movable end. The fixed end is in contact with the end plate 301 on the side near the connecting end 101, and the movable end is in contact with the vertical plate 2.

[0060] The fixed end of the jack contacts the end plate 301 near the connecting end 101, while the movable end contacts the vertical plate. This rational contact design allows the jack to effectively introduce its own force into the movable guide vane adjustment system. The pressure generated by the jack acts perpendicularly to the end plate and vertical plate, while the force required for adjusting the movable guide vane is typically a pulling force. During the adjustment of the movable guide vane angle, the pressure from the jack is transmitted and its direction is changed through components such as connecting rods and pins in the adjustment mechanism. By using the jack as an auxiliary force device, the pressure from the jack is converted into the pulling force required for adjustment, achieving a labor-saving and safe operating effect.

[0061] Preferred, such as Figures 1-3 , Figure 11 As shown, the other end of the connecting plate 10 is fixed to the adjacent double boom of the water turbine by a chuck 14. The chuck 14 is provided with a limiting block 1402 that cooperates with the double boom of the water turbine, and the chuck 14 is provided with a plurality of screw holes 1401 in the circumferential direction.

[0062] The chuck-type structure transforms the unstable quadrilateral structure into a stable triangular structure. Without the chuck limiting position, a quadrilateral structure is formed between the two connecting rods, the connecting plate, and the pin holes on the adjusting ring where the two connecting rods are mounted. By using the limiting block on the chuck to fix the connecting plate to the chuck, the degree of freedom of the connecting plate is restricted. The entire structure is equivalent to one side of a triangle, and then connected to the adjacent connecting rod with the shaft pin 2 to form a stable triangular structure.

[0063] The chuck and double connecting arm are integrated by the three-pin shaft, but it can also rotate around the pin shaft. Therefore, two limit blocks are welded on both sides of the chuck to restrict rotation. In addition, if there are no limit blocks, the entire device will shift under the pressure of the jack.

[0064] The introduction of the chuck-type structure cleverly solves the instability problem of the aforementioned quadrilateral structure. When the limiting block 1402 on the chuck 14 is used to fix the connecting plate 10 to the chuck 14, the mechanical properties of the entire structure are fundamentally changed. The limiting block 1402 restricts the degree of freedom of the connecting plate 10 in planar rotation, so that the connecting plate 10 can only move within a specific range, or even be completely fixed in some directions. At this time, the connecting plate part in the original quadrilateral structure is equivalent to being "locked," and its movement is strictly constrained. From a mechanical point of view, this part is equivalent to one side of a triangle.

[0065] The connecting plate 10 is fixed to the chuck-type structure on the double boom head of the turbine via the chuck 14. By cleverly utilizing limit blocks and screw holes, a stable connection is achieved, successfully transforming the originally unstable quadrilateral structure into a stable triangular structure. This innovative design plays a significant role in the turbine's operational stability, safety, service life, and ease of maintenance.

[0066] Preferred, such as Figure 10 As shown, the other end of the connecting plate 10 is provided with a plurality of circumferential grooves 1002 that mate with the screw holes 1401, and the other end of the connecting plate 10 is fixed to the screw holes 1401 by a shaft pin 3 12.

[0067] During the actual installation of a water turbine, the complex and diverse on-site environment can lead to various factors such as space constraints and foundation size deviations. Traditional fixed-hole connection methods require extremely high precision in installation position; even a slight deviation between the actual on-site conditions and the design dimensions can prevent successful installation. The circumferential groove 1002 overcomes this limitation, allowing the connecting plate 10 and chuck 14 to be adjusted relative to each other within a certain range. Whether the chuck 14 is slightly offset due to uneven foundation or the initial position of the connecting plate 10 is affected by the installation sequence of other components, operators can fine-tune the relative angle between the connecting plate 10 and chuck 14 to ensure that the shaft pin 12 can smoothly pass through the groove 1002 and screw hole 1401 for fixation, thus greatly improving the adaptability of the installation.

[0068] During installation, the use of the circumferential groove 1002 reduces the need for precise alignment. Operators no longer need to spend significant time and effort precisely adjusting the angle between the connecting plate 10 and the chuck 14 to ensure complete alignment of their fixing holes. Simply place the connecting plate 10 roughly in the appropriate position, and then fine-tune it so that the shaft pin 12 can be inserted into the groove 1002 and the screw hole 1401 to complete the initial fixing. This simplified installation process not only saves installation time but also improves work efficiency.

[0069] Preferably, the jack 4 is a screw jack.

[0070] In adjusting the angle of the movable guide vanes of a hydro turbine, a screw jack is used as an auxiliary force device. This device features a compact and reliable structure, easy and safe operation. The screw jack achieves lifting through a screw-nut helical transmission. Its core components (screw, nut, base, and tray) are compactly designed, small in size and light in weight, facilitating installation and operation in confined spaces. For example, when adjusting the movable guide vanes of a hydro turbine, the screw jack can be flexibly placed between the end plate and the vertical plate. The rotation of the screw pushes the tray up or down, directly transmitting the pulling force to the guide vane adjustment mechanism. Its maximum lifting capacity can reach 100 tons, fully meeting the adjustment requirements of large components of the hydro turbine, and its high structural strength allows it to stably support heavy objects for extended periods.

[0071] The screw jack converts rotational force into linear motion through screw drive, amplifying the force using the lever principle. The operator simply rotates the screw via the handle to move the nut and adjust the guide vane angle. Compared to directly applying tension, the screw drive, through its thread helix angle and pitch design, significantly reduces the manual labor required for operation.

[0072] Preferred, such as Figure 9 As shown, the top of the wedge plate 8 is provided with a wedge-pulling hole.

[0073] The wedge-pulling hole provides the operator with a clear point of leverage. When the position of the wedge plate needs to be adjusted, a special wedge-pulling tool (such as a wedge puller, pry bar, etc.) can be quickly inserted into the hole to accurately position the wedge plate, avoiding wasting time by blindly searching for a point of leverage and greatly improving operating efficiency. For example, a circular or elliptical wedge-pulling hole can be used.

[0074] Preferred, such as Figures 2-3 As shown, a gasket 7 is provided between the pull rod 9 and the wedge plate 8, and a set bolt 11 and a second gasket 13 are also provided between the circumferential groove 1002 and the screw hole 1401.

[0075] 1. Connection between tie rod and wedge plate

[0076] When the tie rod 9 transmits tensile force, the contact surface with the wedge plate 8 experiences significant stress concentration. The addition of the shim 7 expands the stress-bearing area 9 (the shim 7 is relatively large), dispersing the concentrated stress over a larger area and thus reducing the stress value per unit area. For example, if the tie rod acts directly on the wedge plate, the contact surface may only be a small area at the end of the tie rod, resulting in significant stress concentration; however, with the addition of the shim 7, the stress can be dispersed to the entire contact surface of the shim, effectively preventing localized deformation or damage to the wedge plate due to stress concentration and enhancing the structure's load-bearing capacity.

[0077] 2. Set bolt connection

[0078] During the tightening process, the set bolt 11 exerts tremendous pressure on the contact surface between the circumferential groove 1002 and the bolt hole 1401. The washer 13 also serves to distribute stress, preventing crushing or deformation of the contact surface due to excessive pressure, thus ensuring the reliability of the set bolt connection.

[0079] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0080] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A special movable guide vane adjustment device for hydro-generator sets, characterized in that, Includes a tray (1), the tray (1) includes a connecting end (101) and a guide rail end (102), the connecting end (101) is connected to the crank arm by a positioning pin, the guide rail end (102) is fitted with a sliding frame (3) that slides with it, one end of a pull rod (9) is fixed on the side of the sliding frame (3) away from the connecting end (101), a jack (4) is provided inside the sliding frame (3), and the pull rod (9) is fixed to the head of the double boom of the water turbine by a connecting plate (10); The pull rod (9) is provided with multiple square grooves (901). The other end of the pull rod (9) passes through the radial through hole (601) of the second shaft pin (6). The pull rod (9) is limited by inserting the wedge plate (8) into the square groove (901). The second shaft pin (6) is connected to one end of the connecting plate (10). A side hole (1001) is opened on one end of the connecting plate (10).

2. The movable guide vane adjustment device for a hydro-generator set as described in claim 1, characterized in that, The connecting end (101) includes a vertical plate, and two opposing clamping arms are welded to the inner side of the vertical plate. The two clamping arms are provided with pin holes, and the clamping arms are fixedly connected to the crank arm through a shaft pin (2).

3. The movable guide vane adjustment device for a hydro-generator set as described in claim 2, characterized in that, The guide rail end (102) includes a base plate, one end of which is welded to the outside of the first vertical plate, guide rails are welded to both sides of the base plate, and the other end of the base plate is welded to the second vertical plate.

4. The movable guide vane adjustment device for a hydro-generator set as described in claim 3, characterized in that, The sliding frame (3) includes two end plates (301) arranged opposite each other. The two end plates (301) are connected by two opposite connecting rods (303). The end plate (301) at the end of the sliding frame (3) that is fixed to the pull rod (9) has a connecting hole (302) and is fixedly connected to the pull rod (9) by a connector (5).

5. The movable guide vane adjustment device for a hydro-generator set as described in claim 4, characterized in that, The jack (4) includes a fixed end and a movable end. The fixed end is in contact with the end plate (301) on the side near the connecting end (101), and the movable end is in contact with the vertical plate.

6. A movable guide vane adjustment device for a hydro-generator set as described in any one of claims 1-5, characterized in that, The other end of the connecting plate (10) is fixed to the adjacent double boom of the water turbine by a chuck (14). The chuck (14) is provided with a limiting block (1402) that cooperates with the double boom of the water turbine. The chuck (14) is provided with multiple screw holes (1401) in the circumferential direction.

7. The movable guide vane adjustment device for a hydro-generator set as described in claim 6, characterized in that, The other end of the connecting plate (10) is provided with a plurality of circumferential grooves (1002) that cooperate with the screw hole (1401), and the other end of the connecting plate (10) is fixed to the screw hole (1401) by a shaft pin three (12).

8. The movable guide vane adjustment device for a hydro-generator set as described in claim 1, characterized in that, The jack (4) is a screw jack.

9. The movable guide vane adjustment device for a hydro-generator set as described in claim 1, characterized in that, The top of the wedge plate (8) is provided with a wedge-pulling hole.

10. A movable guide vane adjustment device for a hydro-generator set as described in claim 7, characterized in that, A gasket 1 (7) is provided between the pull rod (9) and the wedge plate (8), and a set bolt (11) and a gasket 2 (13) are also provided between the circumferential groove (1002) and the screw hole (1401).

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