A hydraulic mechanical opening degree limiting mechanism for a hydraulic turbine

Abstract

The utility model discloses a hydraulic type mechanical opening degree limiting mechanism of water turbine relates to water turbine technical field. The utility model discloses an installation board, the top of installation board is provided with adjusting assembly, one side of installation board bottom is provided with limit mechanism, the limit mechanism includes the shell, the top of shell is fixedly connected with installation board, the one side fixed connection of shell inner chamber has motor, the output fixed connection of motor has the lead screw, one side of lead screw is through bearing and the inner wall movable joint of shell. The utility model discloses through motor drive lead screw and drive screw bushing movement, cooperate electric push rod drive limit post telescopic, and the automation adjustment limit position does not need to disassemble oil cylinder like pure hydraulic scheme, also does not need staff to enter the narrow space manual rotation screw rod, and the adjustment process of opening degree limiting range is greatly simplified, improves the operation efficiency, and also avoids the security risk of personnel operation in the narrow space.

Description

Technical Field

[0001] This utility model belongs to the field of water turbine technology, and in particular relates to a hydraulic mechanical opening limit mechanism for water turbines. Background Technology

[0002] The opening of the turbine guide vanes is a key parameter for regulating the water flow rate. It needs to be adjusted in real time according to the upstream water level, unit load and other operating conditions. When the load needs to be increased, the opening is increased to introduce more water flow; when the load needs to be reduced or the system fails, the opening is quickly limited to avoid accidents such as excessive unit speed, increased vibration, or even blade damage.

[0003] Currently, the guide vane control linkage is directly connected to the hydraulic cylinder, and the opening is controlled by adjusting the extension and retraction of the cylinder using the hydraulic valve group. At the same time, the upper limit of the opening is limited by the preset mechanical stop block inside the cylinder. The mechanical manual adjustment scheme adopts a mechanical structure composed of a fixed screw and a limit block. The staff adjusts the position of the limit block by rotating the screw on site to limit the maximum opening of the guide vane.

[0004] The limit position of the pure hydraulic method is fixed, and the adjustment requires disassembling the oil cylinder. The mechanical manual method requires personnel to enter a confined space to operate, which is inefficient and has safety risks. At the same time, the limit accuracy is low and the response is slow. The pure hydraulic solution is affected by the oil viscosity and pipeline pressure, resulting in large positioning errors.

[0005] To address these issues, we provide a hydraulic mechanical opening limit mechanism for water turbines. Utility Model Content

[0006] The purpose of this utility model is to provide a hydraulic mechanical opening limit mechanism for a water turbine. By cooperating with the adjustment component and the limit mechanism, it solves the problems of fixed limit position and inconvenient adjustment in the pure hydraulic method in the prior art, and low efficiency and safety risks in the mechanical manual method.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a hydraulic mechanical opening limiting mechanism for a water turbine, comprising a mounting plate. An adjusting assembly is located on the top of the mounting plate, and a limiting mechanism is located on one side of the bottom of the mounting plate. The limiting mechanism includes a housing, the top of which is fixedly connected to the mounting plate. A motor is fixedly connected to one side of the inner cavity of the housing, and a lead screw is fixedly connected to the output end of the motor. One side of the lead screw is movably connected to the inner wall of the housing via a bearing. A threaded sleeve is threaded onto the surface of the lead screw, and a limiting frame is fixedly connected to the top of the threaded sleeve. An electric push rod is fixedly connected to the bottom of one side of the limiting frame. The bottom is fixedly connected to a limit post. The threaded sleeve moves along the axial direction of the lead screw as the screw rotates forward and backward, thereby driving the limit frame fixed at the top of the threaded sleeve to move synchronously, realizing the adjustment of the position of the limit frame. The electric push rod extends and retracts in the vertical direction, and the limit post fixed at its bottom moves up and down with the extension and retraction of the electric push rod. Finally, the opening limit is completed through the cooperation of the limit post and the adjustment component. The opening limit range can be adjusted without disassembling the parts, making the operation more convenient. At the same time, the outer shell protects the internal structure, preventing impurities in the turbine operating environment from entering, reducing component wear, ensuring the long-term stable operation of the limit mechanism, and reducing the risk of failure.

[0009] The present invention is further configured such that the adjusting component includes a hydraulic cylinder, the bottom of which is positioned above the mounting plate. A connecting ring is fixedly connected to one side of the hydraulic cylinder, and an adjusting rod is movably connected to the top of the connecting ring via a rotating shaft. A positioning block is fixedly connected to one side of the connecting ring, and a limiting hole is provided on the top of the positioning block for use with a limiting post. The connecting ring is movably connected to the adjusting rod via a rotating shaft, allowing the adjusting rod to rotate flexibly and ensuring the adjustment of the guide vane opening. The limiting hole on the top of the positioning block provides a docking position for the limiting post, effectively limiting the guide vane opening and ensuring that the turbine operates within a safe opening range.

[0010] The present invention is further configured such that a limiting groove is provided on one side of the limiting frame, the limiting groove is adapted to the positioning block, and when the positioning block moves to the vicinity of the limiting frame with the adjusting component, the limiting groove plays a lateral restraining role on the positioning block, calibrating the position of the positioning block, and ensuring that the limiting post and the limiting hole are accurately connected.

[0011] The present invention is further provided that mounting holes are provided at the four corners of the top of the mounting plate, and the mounting holes are symmetrically arranged. The mounting holes are used to fix the mechanism to the corresponding position of the water turbine by bolts. The symmetrically distributed mounting holes can ensure that the mechanism is subjected to uniform force during the installation process.

[0012] The present invention is further configured such that a slide rod is fixedly connected to the inner cavity of the outer shell, the surface of the slide rod is slidably connected to the threaded sleeve, and the slide rod and the threaded sleeve are slidably connected. When the threaded sleeve moves axially with the rotation of the screw, the slide rod plays a guiding role for the threaded sleeve.

[0013] The present invention is further configured such that connecting blocks are fixedly connected to both sides of the bottom of the hydraulic cylinder, and the bottom of the connecting blocks are fixedly connected to the mounting plate. The connecting blocks connect the hydraulic cylinder to the mounting plate, thereby enhancing the stability of the hydraulic cylinder during operation.

[0014] The present invention is further configured such that a protective cover is fixedly connected to the top of the connecting block, and the protective cover is fitted onto the top of the hydraulic cylinder, thereby providing protection for the hydraulic cylinder.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model uses a motor to drive a lead screw to move a threaded sleeve, which in turn drives an electric push rod to extend and retract a limit post, automatically adjusting the limit position. Unlike pure hydraulic solutions, it does not require disassembling the oil cylinder or having personnel manually rotate the lead screw in a confined space. This greatly simplifies the adjustment process of the opening limit range, improving operational efficiency and avoiding safety hazards for personnel working in confined spaces.

[0017] 2. This utility model uses the sliding cooperation between the slide rod and the threaded sleeve to avoid the threaded sleeve from shifting during movement, ensuring that the limiting frame drives the limiting column to align with the limiting hole of the positioning block. This solves the positioning error problem caused by the viscosity of the oil and the pressure of the pipeline in the pure hydraulic solution, and improves the accuracy of the opening limit. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of a hydraulic mechanical opening limit mechanism for a water turbine.

[0020] Figure 2 This is a bottom-view perspective view of a hydraulic mechanical opening limit mechanism for a water turbine.

[0021] Figure 3 In a hydraulic mechanical opening limiting mechanism for a water turbine Figure 2 A magnified view of part A.

[0022] Figure 4 This is a side perspective view of a hydraulic mechanical opening limit mechanism for a water turbine.

[0023] Figure 5 This is a top perspective view of the outer casing of a hydraulic mechanical opening limit mechanism for a water turbine.

[0024] In the attached diagram: 1. Mounting plate; 2. Adjustment assembly; 21. Hydraulic cylinder; 22. Connecting ring; 23. Adjusting rod; 24. Positioning block; 25. Limiting hole; 3. Limiting mechanism; 31. Housing; 32. Motor; 33. Lead screw; 34. Threaded sleeve; 35. Limiting frame; 36. Electric push rod; 37. Limiting post; 4. Limiting groove; 5. Mounting hole; 6. Slide rod; 7. Connecting block; 8. Protective cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1 Please see Figure 1-5 This utility model is a hydraulic mechanical opening limit mechanism for a water turbine, including a mounting plate 1, an adjustment component 2 on the top of the mounting plate 1, and a limit mechanism 3 on one side of the bottom of the mounting plate 1. The limit mechanism 3 includes a housing 31, the top of the housing 31 is fixedly connected to the mounting plate 1, a motor 32 is fixedly connected to one side of the inner cavity of the housing 31, a lead screw 33 is fixedly connected to the output end of the motor 32, one side of the lead screw 33 is movably connected to the inner wall of the housing 31 through a bearing, a threaded sleeve 34 is threadedly connected to the surface of the lead screw 33, a limit frame 35 is fixedly connected to the top of the threaded sleeve 34, an electric push rod 36 is fixedly connected to the bottom of one side of the limit frame 35, and a limit post 37 is fixedly connected to the bottom of the electric push rod 36.

[0027] Specifically: the threaded sleeve 34 moves axially along the lead screw 33 as the lead screw 33 rotates in both directions, thereby driving the limiting frame 35 fixed at the top of the threaded sleeve 34 to move synchronously, thus adjusting the position of the limiting frame 35. The electric push rod 36 extends and retracts in the vertical direction, and the limiting post 37 fixed at its bottom moves up and down with the extension and retraction of the electric push rod 36. Finally, the opening limit is completed through the cooperation of the limiting post 37 and the adjusting component 2. The opening limit range can be adjusted without disassembling the parts, making the operation more convenient. At the same time, the outer shell 31 protects the internal structure, preventing impurities from the turbine operating environment from entering, reducing component wear, ensuring the long-term stable operation of the limiting mechanism 3, and reducing the risk of failure.

[0028] Example 2 Please see Figure 1-5Based on Embodiment 1, the adjusting component 2 includes a hydraulic cylinder 21. The bottom of the hydraulic cylinder 21 is positioned above the mounting plate 1. A connecting ring 22 is fixedly connected to one side of the hydraulic cylinder 21. An adjusting rod 23 is movably connected to the top of the connecting ring 22 via a rotating shaft. A positioning block 24 is fixedly connected to one side of the connecting ring 22. A limiting hole 25 is provided on the top of the positioning block 24 to cooperate with the limiting post 37. A limiting groove 4 is provided on one side of the limiting frame 35. The limiting groove 4 is adapted to the positioning block 24. Mounting holes 5 are provided at the four corners of the top of the mounting plate 1. The mounting holes 5 are symmetrically arranged. A sliding rod 6 is fixedly connected to the inner cavity of the outer shell 31. The surface of the sliding rod 6 is slidably connected to the threaded sleeve 34. Connecting blocks 7 are fixedly connected to both sides of the bottom of the hydraulic cylinder 21. The bottom of the connecting blocks 7 is fixedly connected to the mounting plate 1. A protective cover 8 is fixedly connected to the top of the connecting blocks 7. The protective cover 8 is fitted onto the top of the hydraulic cylinder 21.

[0029] Specifically: the connecting ring 22 is movably connected to the adjusting rod 23 via a rotating shaft, allowing the adjusting rod 23 to rotate flexibly and ensuring the adjustment of the guide vane opening. The top of the positioning block 24 has a limiting hole 25 that mates with the limiting post 37, providing a docking position for the limiting post 37 and effectively limiting the guide vane opening, ensuring the turbine operates within a safe opening range. When the positioning block 24 moves with the adjusting assembly 2 to the vicinity of the limiting frame 35, the limiting groove 4 provides lateral constraint on the positioning block 24, calibrating its position and ensuring the limiting post 37... 7 is accurately aligned with the limiting hole 25. The mounting hole 5 is fixed to the corresponding position of the turbine by bolts. The symmetrically distributed mounting holes 5 can ensure that the mechanism is evenly stressed during installation. The slide rod 6 is slidably connected to the threaded sleeve 34. When the threaded sleeve 34 moves axially with the rotation of the screw 33, the slide rod 6 guides the threaded sleeve 34. The connecting block 7 connects the hydraulic cylinder 21 to the mounting plate 1, which enhances the stability of the hydraulic cylinder 21 during operation. The protective cover 8 is fitted on the top of the hydraulic cylinder 21 to provide protection for the hydraulic cylinder 21.

[0030] The working principle of this utility model is as follows: When it is necessary to adjust the guide vane opening limit range, the motor 32 is started. The motor 32 drives the lead screw 33 to rotate forward or reverse. Since the threaded sleeve 34 connected to the threaded surface of the lead screw 33 slides and engages with the slide rod 6 fixed in the inner cavity of the outer shell 31, the threaded sleeve 34 moves along the axial direction of the lead screw 33. The limiting frame 35 moves synchronously, thereby adjusting the horizontal position of the limiting frame 35 to adapt to different opening limit requirements. When the hydraulic cylinder 21 is working, it provides power for adjusting the guide vane opening. The connecting ring 22 is movably connected to the adjusting rod 23 through the rotating shaft. The adjusting rod 23 rotates flexibly to adapt to the movement trajectory of the guide vane, thereby driving the guide vane to adjust its opening. At the same time, the positioning block 24 moves synchronously with the adjusting component 2. When the limiting frame 35 moves to the target position, the electric push rod 36 is activated. The electric push rod 36 extends and retracts in the vertical direction, driving the limiting post 37 to move up and down. The limiting groove 4 forms a lateral constraint on the positioning block 24, calibrating the position of the positioning block 24 to ensure that the limiting hole 25 is aligned with the limiting post 37. The limiting post 37 is inserted into the limiting hole 25 under the drive of the electric push rod 36, thus limiting the movement range of the adjusting component 2, thereby limiting the guide vane opening and ensuring that the turbine operates within a safe opening range.

[0031] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A hydraulic mechanical opening limiting mechanism for a water turbine, comprising a mounting plate (1), characterized in that: An adjustment component (2) is provided on the top of the mounting plate (1), and a limit mechanism (3) is provided on one side of the bottom of the mounting plate (1). The limiting mechanism (3) includes a housing (31), the top of which is fixedly connected to the mounting plate (1), a motor (32) is fixedly connected to one side of the inner cavity of the housing (31), a lead screw (33) is fixedly connected to the output end of the motor (32), one side of the lead screw (33) is movably connected to the inner wall of the housing (31) through a bearing, a threaded sleeve (34) is threadedly connected to the surface of the lead screw (33), a limiting frame (35) is fixedly connected to the top of the threaded sleeve (34), an electric push rod (36) is fixedly connected to the bottom of one side of the limiting frame (35), and a limiting post (37) is fixedly connected to the bottom of the electric push rod (36).

2. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 1, characterized in that: The adjustment assembly (2) includes a hydraulic cylinder (21), the bottom of which is located above the mounting plate (1). A connecting ring (22) is fixedly connected to one side of the hydraulic cylinder (21). An adjusting rod (23) is movably connected to the top of the connecting ring (22) via a rotating shaft. A positioning block (24) is fixedly connected to one side of the connecting ring (22). A limiting hole (25) is provided on the top of the positioning block (24) to cooperate with the limiting post (37).

3. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 2, characterized in that: The limiting frame (35) has a limiting groove (4) on one side, which is adapted to the positioning block (24).

4. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 1, characterized in that: The mounting plate (1) has mounting holes (5) at each of its four corners, and the mounting holes (5) are arranged symmetrically.

5. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 1, characterized in that: The inner cavity of the outer shell (31) is fixedly connected to a slide rod (6), and the surface of the slide rod (6) is slidably connected to the threaded sleeve (34).

6. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 2, characterized in that: Both sides of the bottom of the hydraulic cylinder (21) are fixedly connected to connecting blocks (7), and the bottom of the connecting blocks (7) is fixedly connected to the mounting plate (1).

7. The hydraulic mechanical opening limiting mechanism for a water turbine according to claim 6, characterized in that: The top of the connecting block (7) is fixedly connected to a protective cover (8), which is fitted onto the top of the hydraulic cylinder (21).

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