A water turbine guide vane angle indicating device

Abstract

The utility model discloses a water turbine guide vane rotation angle indicating device relates to water turbine auxiliary measurement technical field, and the device includes indicating assembly and water turbine assembly, and water turbine assembly contains guide vane axle, guide vane arm, guide vane sleeve and guide vane end cover, guide vane arm is connected with guide vane axle, and guide vane end cover is installed on guide vane axle and guide vane arm, and guide vane sleeve is fixed on the outer ring of guide vane axle and keeps stationary when guide vane axle rotates, and indicating assembly includes scale board and pointer, and scale board is installed on guide vane end cover, and pointer is installed on guide vane sleeve, when guide vane axle rotates around its own axis, scale board rotates synchronously with guide vane axle, and the scale line that pointer indicates end points at is the real -time rotation angle of guide vane axle. The device provides stationary reference through guide vane sleeve, and guide vane end cover drives scale board synchronous movement, and the relative rotation of both completes rotation angle monitoring, and the stationary guide vane sleeve guarantees that indicating reference is stable, and effectively promotes the accuracy and reliability of rotation angle indication, and adapts the operation monitoring demand of water turbine guide vane.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary measurement technology for water turbines, and in particular to a water turbine guide vane angle indicator device. Background Technology

[0002] In general, when a cross-flow turbine is running, the existing methods for measuring the guide vane opening are: measuring the guide vane servo travel and measuring the control ring rotation angle. The method for measuring the guide vane servo travel is based on the theoretical relationship between the guide vane servo and the guide vane rotation angle provided by the manufacturer, converting the measured travel into the guide vane rotation angle. Similarly, the method for measuring the control ring rotation angle is based on the theoretical relationship between the control ring rotation angle and the guide vane rotation angle provided by the manufacturer, converting the measured control ring rotation angle into the guide vane rotation angle. Because there are multiple transmission components between the guide vane shaft and the servo or control ring, the clearance error is large. Furthermore, cross-flow turbines use conical guide vanes, and the calculation process for converting the guide vane servo travel or control ring rotation angle into the guide vane rotation angle is complex, inevitably prone to errors, and not very intuitive.

[0003] Therefore, there is an urgent need for a turbine guide vane angle indicator device that can effectively improve the accuracy and reliability of the angle indication and is suitable for the operation monitoring needs of turbine guide vanes. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a turbine guide vane angle indicator device that can accurately and intuitively indicate the guide vane angle. To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a turbine guide vane angle indicator device, comprising an indicator component for indicating the guide vane angle and a turbine component for associating the indicator component with the turbine guide vane. The turbine component includes a guide vane shaft, a guide vane arm, a guide vane sleeve, and a guide vane end cap. The guide vane arm is fixedly connected to the end of the guide vane shaft. The guide vane end cap is fixedly mounted on the assembly formed by the guide vane shaft and the guide vane arm. The guide vane sleeve is sleeved on the outer ring of the guide vane shaft, and the guide vane sleeve remains stationary during the rotation of the guide vane shaft. The indicating component includes a scale plate and a pointer. The scale plate is mounted on the guide vane end cover, and the pointer is mounted on the guide vane sleeve. The free end of the pointer extends into the scale line area of ​​the scale plate. When the guide vane shaft rotates around its own axis, the scale plate rotates synchronously with the guide vane shaft, and the scale line pointed to by the pointer is the real-time rotation angle of the guide vane shaft.

[0005] Furthermore, the scale line range of the scale plate is consistent with the maximum rotatable angle range of the guide vane shaft, and the pointer corresponds to the scale line area of ​​the scale plate during the process of the guide vane shaft from fully closed to fully open.

[0006] Furthermore, the scale lines on the scale plate are evenly distributed along the arc-shaped edge, and the extension direction of the scale lines points to the rotation axis of the guide vane shaft. The scale lines rotate synchronously around the axis of the guide vane shaft as the guide vane shaft rotates.

[0007] Furthermore, when the guide vane shaft is rotated to the fully closed state, the pointer is aligned with the 0° mark on the scale plate.

[0008] Furthermore, the pointer includes a fixed section and an indicating section that are perpendicular to each other, with the end of the fixed section mounted on the guide vane sleeve.

[0009] Furthermore, the scale plate is engraved with percentage values ​​of the guide vane shaft rotation angle.

[0010] Furthermore, the guide vane arm is circumferentially positioned by passing a cylindrical pin through the corresponding pin hole on the guide vane arm and the guide vane shaft. The guide vane end cover is connected to the guide vane shaft and the guide vane arm by bolts, which pass through the corresponding screw holes on the guide vane end cover and the guide vane arm to fix the guide vane end cover to the guide vane arm.

[0011] (1) The indicator component of this utility model is directly fixed to the guide vane through the scale plate, so that the scale plate rotates synchronously with the guide vane, and the pointer is fixed on the stationary guide vane sleeve as a reference, realizing the direct measurement of the guide vane rotation angle, eliminating the gap error and conversion deviation of the indirect transmission link, and the measurement accuracy is higher than that of the traditional indirect measurement method, which can accurately and intuitively reflect the real-time rotation angle status of the guide vane.

[0012] (2) The fan-shaped scale plate of this utility model directly engraves the absolute value of the guide vane rotation angle. The scale pointed to by the pointer is the real-time rotation angle of the guide vane. No intermediate conversion is required. Users can directly and quickly obtain the rotation angle information, which greatly improves the convenience and timeliness of operation monitoring.

[0013] (3) During installation, the pointer and the scale plate can be adjusted to ensure that the pointer is accurately aligned with the 0 mark on the scale plate when the guide vane is fully closed, thus achieving on-site benchmark calibration. The scale plate and the pointer can be detachably installed on the assembly component by bolts. This, combined with on-site benchmark calibration, can effectively offset the cumulative error of on-site installation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a top view of the present invention.

[0016] The components are: 1. scale plate; 2. pointer; 3. scale plate bolt; 4. guide vane end cover; 5. guide vane arm; 6. pointer bolt; 7. guide vane shaft; 8. guide vane sleeve. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the embodiments.

[0018] Example 1 like Figure 1 As shown, this embodiment provides a turbine guide vane angle indicating device, including an indicating component for indicating the guide vane angle and a turbine assembly for associating the indicating component with the turbine guide vane. The turbine assembly includes a guide vane shaft 7, a guide vane arm 5, a guide vane sleeve 8, and a guide vane end cap 4. The guide vane arm 5 is fixedly connected to the guide vane shaft 7, and the guide vane end cap 4 is detachably fixed to the assembly formed by the guide vane shaft 7 and the guide vane arm 5. The guide vane sleeve 8 is sleeved on the outer ring of the guide vane shaft 7 and remains stationary during the rotation of the guide vane shaft 7. The indicating component is connected to the guide vane sleeve 8 and the guide vane end cap 4 and is used to indicate the real-time angle of the guide vane shaft 7.

[0019] The turbine guide vane angle indicator includes an indicator component for realizing the angle indication function, and a turbine component that provides an installation foundation for the indicator component and realizes the associated transmission. The turbine component is the original core component of the turbine guide vane mechanism. There is no need to modify its main structure. The angle indication function can be realized simply by adapting and installing the indicator component, which greatly reduces the difficulty and cost of modification.

[0020] The guide vane shaft 7 and guide vane arm 5 are circumferentially fixed by locating pins. Locating pin holes are machined at the ends of the guide vane shaft 7, and matching pin holes are machined at corresponding positions on the guide vane arm 5. Cylindrical pins pass through these two pin holes to achieve rigid circumferential positioning of the guide vane shaft 7 and guide vane arm 5, ensuring no relative rotation between them. The guide vane end cover 4 is fixedly connected to the guide vane arm 5 and guide vane shaft 7 by bolts. The guide vane sleeve 8 is fixed to the outer ring of the turbine guide vane shaft 7 by bolts. The guide vane sleeve 8 remains stationary throughout the entire rotation of the guide vane shaft 7, providing a stable reference support for the pointer 2.

[0021] The indicating component includes a scale plate 1 and a pointer 2. The scale plate 1 is detachably mounted on the guide vane end cover 4, and the pointer 2 is detachably mounted on the guide vane sleeve 8, with the free end of the pointer 2 extending into the scale line area of ​​the scale plate 1. When the guide vane shaft 7 rotates around its own axis, the pointer 2 and the scale plate 1 rotate relative to each other. The scale plate 1 rotates synchronously with the guide vane shaft 7, while the pointer 2 remains stationary with the guide vane sleeve 8. The scale line pointed to by the indicating end of the pointer 2 is the real-time rotation angle of the guide vane shaft 7.

[0022] The pointer 2 includes a fixed section and an indicating section that are perpendicular to each other. The end of the fixed section is mounted on the guide vane sleeve 8. The scale line range of the scale plate 1 is consistent with the maximum rotatable angle range of the guide vane shaft 7. During the process of the guide vane shaft 7 moving from fully closed to fully open, the pointer 2 corresponds to the scale line area of ​​the scale plate 1. The scale lines on the scale plate 1 are evenly distributed along the arc-shaped edge, and the direction of the scale lines extends towards the rotation axis of the guide vane shaft 7. The scale lines rotate synchronously around the axis of the guide vane shaft 7 as the guide vane shaft 7 rotates. When the guide vane shaft 7 rotates to the fully closed state, the pointer 2 is aligned with the 0° mark on the scale plate 1. Figure 2 As shown, the scale range is 0°-80°.

[0023] The scale plate 1 adopts a fan-shaped structure design. The range of the scale lines on its arc edge is completely consistent with the maximum rotatable angle range of the guide vane shaft 7. The scale lines are marked along the arc edge according to the evenly divided values, and the extension direction of all scale lines is precisely pointing to the rotation axis of the guide vane shaft 7, ensuring that the linear velocity of the scale lines around the rotation axis is consistent when the guide vane shaft 7 rotates, and avoiding the deviation of the pointer 2.

[0024] The scale plate 1 is installed in a detachable structure. The end face of the guide vane end cover 4 is machined with threaded holes. The scale plate 1 is fixed to the guide vane end cover 4 at the corresponding position by the scale plate bolt 3. During installation, it is necessary to ensure that the center of the scale plate 1 coincides with the axis of rotation of the guide vane shaft 7.

[0025] The pointer 2 adopts an L-shaped structure design, consisting of a fixed end and an indicating section that are perpendicular to each other. The fixed section is connected to a flange with mounting holes that match the pre-drilled threaded holes on the outer wall of the guide vane sleeve 8. The free end of the indicating section is machined into a wedge-shaped tip to ensure clear scale indication. The pointer 2 is also detachable, secured to the outer wall of the guide vane sleeve 8 by pointer bolts 6. A fan-shaped perforation is provided on the inner side of the scale plate 1 near the guide vane shaft 7. The L-shaped pointer 2 passes through this perforation and extends towards the scale line area. In practice, the scale plate 1 can simultaneously display the percentage value of the guide vane shaft 7's rotation angle.

[0026] During installation, to ensure indication accuracy, a benchmark calibration is required after the device is installed. The specific steps are as follows: operate the turbine guide vane shaft 7 to the fully closed position so that the tip of the pointer 2 is precisely aligned with the 0° mark on the scale plate 1.

[0027] When the turbine drives the guide vane arm 5 to rotate, the guide vane arm 5 rotates synchronously with the guide vane shaft 7 around its own axis. Simultaneously, the scale plate 1, fixed to the guide vane end cover 4, rotates synchronously with the guide vane shaft 7, forming a moving scale carrier. The guide vane sleeve 8, installed on the outer ring of the guide vane shaft 7, remains stationary throughout the rotation of the guide vane shaft 7. The pointer 2, fixed to the guide vane sleeve 8, remains stationary with the sleeve, forming a stable indicating reference. When the guide vane shaft 7 rotates, the scale plate 1 and the pointer 2 rotate relative to each other. Since the scale line range of the scale plate 1 matches the maximum rotation angle of the guide vane shaft 7, and the 0° mark has been calibrated with the fully closed state of the guide vane shaft 7, the scale line value pointed to by the wedge-shaped tip of the pointer 2 is the real-time rotation angle of the guide vane shaft 7. For example, when the guide vane shaft 7 rotates to the half-open position, the scale plate 1 rotates with the guide vane shaft 7, and the pointer 2 points to the corresponding scale line.

[0028] Example 2 This embodiment is based on the turbine guide vane angle indicator device in Embodiment 1, including an indicator component for indicating the angle of rotation of the guide vane shaft 7 and a turbine assembly for associating the indicator component with the turbine guide vane shaft 7. The turbine assembly includes the guide vane shaft 7, guide vane arm 5, guide vane sleeve 8, and guide vane end cap 4. The guide vane arm 5 is fixedly connected to the guide vane shaft 7. The guide vane end cap 4 is detachably fixed to the assembly formed by the guide vane shaft 7 and the guide vane arm 5. The guide vane sleeve 8 is fixed to the outer ring of the guide vane shaft 7 and remains stationary during the rotation of the guide vane shaft 7. The indicator component is connected to the guide vane sleeve 8 and the guide vane end cap 4 and is used to indicate the real-time angle of rotation of the guide vane shaft 7.

[0029] In implementation, the indicating component includes a scale plate 1 and a pointer 2. The pointer 2 is detachably mounted on the guide vane end cover 4, and the scale plate 1 is detachably mounted on the guide vane sleeve 8. The free end of the pointer 2 extends into the scale line area of ​​the scale plate 1. When the guide vane shaft 7 rotates around its own axis, the pointer 2 and the scale plate 1 rotate relative to each other. The scale line pointed to by the pointer 2 is the real-time rotation angle of the guide vane shaft 7.

[0030] The pointer 2 is horizontally mounted on the guide vane end cover 4. The scale line range of the scale plate 1 is consistent with the maximum rotatable angle range of the guide vane shaft 7. During the process of the guide vane shaft 7 moving from fully closed to fully open, the pointer 2 corresponds to the scale line area of ​​the scale plate 1. The scale lines on the scale plate 1 are evenly distributed along the arc-shaped edge, and the extension direction of the scale lines points to the rotation axis of the guide vane shaft 7. The pointer 2 rotates synchronously around the axis of the guide vane shaft 7 as the guide vane shaft 7 rotates. When the guide vane shaft 7 rotates to the fully closed state, the pointer 2 is aligned with the 0° mark on the scale plate 1.

[0031] In summary, the above embodiments are designed to adapt to the existing components of the turbine, without requiring modification of core components such as the original turbine guide vane shaft 7 and guide vane arm 5. Functional integration is achieved solely through detachable installation, resulting in strong compatibility. The relative movement of the scale plate 1 and the pointer 2 adapts to the rotation of the guide vane shaft 7, forming a fit between the pointer 2 and the fan-shaped scale lines, facilitating debugging, installation, and replacement.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A turbine guide vane angle indicating device, characterized in that, The invention includes an indicator assembly for indicating the angle of the guide vane and a turbine assembly for associating the indicator assembly with the turbine guide vane. The turbine assembly includes a guide vane shaft (7), a guide vane arm (5), a guide vane sleeve (8), and a guide vane end cap (4). The guide vane arm (5) is fixedly connected to the end of the guide vane shaft (7). The guide vane end cap (4) is fixedly mounted on the assembly formed by the guide vane shaft (7) and the guide vane arm (5). The guide vane sleeve (8) is sleeved on the outer ring of the guide vane shaft (7) and remains stationary during the rotation of the guide vane shaft (7). The indicating component includes a scale plate (1) and a pointer (2). The scale plate (1) is mounted on the guide vane end cover (4), and the pointer (2) is mounted on the guide vane sleeve (8). The free end of the pointer (2) extends into the scale line area of ​​the scale plate (1). When the guide vane shaft (7) rotates around its own axis, the scale plate (1) rotates synchronously with the guide vane shaft (7). The scale line pointed to by the pointer (2) is the real-time rotation angle of the guide vane shaft (7).

2. The turbine guide vane angle indicating device according to claim 1, characterized in that, The scale line range of the scale plate (1) is consistent with the maximum rotatable angle range of the guide vane shaft (7). During the process of the guide vane shaft (7) from fully closed to fully open, the pointer (2) corresponds to the scale line area of ​​the scale plate (1).

3. The turbine guide vane angle indicating device according to claim 2, characterized in that, The scale lines on the scale plate (1) are evenly distributed along the arc edge, and the extension direction of the scale lines points to the rotation axis of the guide vane shaft (7). The scale lines rotate synchronously around the axis of the guide vane shaft (7) as the guide vane shaft (7) rotates.

4. The turbine guide vane angle indicating device according to claim 2, characterized in that, When the guide vane shaft (7) is rotated to the fully closed state, the pointer (2) is aligned with the 0° mark on the scale plate (1).

5. The turbine guide vane angle indicating device according to claim 2, characterized in that, The pointer (2) includes a fixed section and an indicating section that are perpendicular to each other, and the end of the fixed section is mounted on the guide vane sleeve (8).

6. The turbine guide vane angle indicating device according to claim 2, characterized in that, The scale plate (1) is engraved with the percentage value of the rotation angle of the guide vane shaft (7).

7. The turbine guide vane angle indicating device according to claim 1, characterized in that, The guide vane arm (5) is circumferentially positioned by passing a cylindrical pin through the corresponding pin hole on the guide vane arm (5) and the guide vane shaft (7). The guide vane end cap (4) is connected to the guide vane shaft (7) and the guide vane arm (5) by bolts. The bolts pass through the corresponding screw holes of the guide vane end cap (4) and the guide vane arm (5) to fix the guide vane end cap (4) and the guide vane arm (5).

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