Fan blade angle correction device

Abstract

The utility model belongs to the technical field of boiler fans, and particularly relates to a fan blade angle correcting device which comprises a rotating part and a fixed part, the rotating part comprises a dial, angle scribed lines are arranged on the dial, the dial is fixed at the top end of a blade rotating shaft, the fixed part comprises a mounting frame and a pointer, and the pointer is fixed on the mounting frame. The pointer is fixedly connected to the installation frame, the installation frame is fixedly installed on an impeller, the dial is rotationally connected to the installation frame, and the pointer points to the angle scribed line. During correction, one blade is detached, the dial is fixed to the blade rotating shaft, the mounting frame is fixed to the impeller, the blade adjusting mechanism drives the blade rotating shaft to rotate when working, the blade rotating shaft drives the dial to rotate, the dial synchronously rotates along with other blades, and the pointer points to the angle scribed line to display the rotating angle of the blade. Therefore, the rotation angle of the blade can be corrected conveniently, and the accuracy of the rotation angle of the blade is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of boiler fan technology, specifically a fan blade angle correction device. Background Technology

[0002] Large axial flow fans are crucial auxiliary equipment in thermal power plants. During operation, the fan output needs to be adjusted according to the boiler load requirements. The main methods for adjusting fan output are frequency conversion regulation and blade adjustment, with adjustable blade axial flow fans being the most widely used. The electric motor drives the fan impeller to rotate at high speed via a drive shaft. The blades on the impeller perform work on the working fluid. During operation, the working angle of the impeller blades is changed through an adjustment mechanism to meet the changing requirements of the system's flow rate and pressure.

[0003] Multiple blades are evenly mounted on the circumference of the impeller. The adjustment mechanism includes multiple rotating shafts, which are arranged radially along the impeller and rotatably connected inside the impeller. The blades are fixedly connected to the top of the rotating shafts, and a crank is connected to the bottom of the rotating shafts. An adjustment disc is connected to the end of the crank away from the rotating shaft. The adjustment disc moves axially along the impeller and is driven by a hydraulic adjustment system. Therefore, the hydraulic adjustment system drives the adjustment disc to move axially, and the adjustment disc drives the rotating shaft to rotate through the crank. The rotating shaft drives the blade to rotate, which means that the axial movement of the adjustment disc is converted into the circumferential motion of the blade through the crank, thereby realizing the adjustment of the blade angle.

[0004] After prolonged operation, problems with transmission components such as the hydraulic adjustment system, adjustment disc, crank, and rotating shaft can cause deviations in the blade angle adjustment, affecting the normal operation of the fan. Therefore, it is necessary to perform regular blade angle correction. Utility Model Content

[0005] To address the problems mentioned above, this utility model provides a wind turbine blade angle correction device. During correction, a blade is removed, a scale is fixed to the blade's rotating shaft, and a mounting bracket is fixed to the impeller. When the blade adjustment mechanism is working, it drives the blade's rotating shaft to rotate, which in turn drives the scale to rotate. The scale rotates synchronously with the other blades, and the indicator needle points to the angle markings to display the blade's rotation angle. This facilitates the correction of the blade's rotation angle and ensures the accuracy of the blade's rotation angle.

[0006] This utility model provides a wind turbine blade angle correction device, including a rotating part and a fixed part. The rotating part includes a scale with angle markings on it. The scale is fixed to the top of the blade rotation shaft. The fixed part includes a mounting bracket and an indicator needle. The indicator needle is fixedly connected to the mounting bracket, which is fixedly mounted on the impeller. The scale is rotatably connected to the mounting bracket, and the indicator needle points to the angle markings.

[0007] By adopting the above technical solution, during calibration, one of the blades on the impeller is removed, the dial is first fixed on the blade rotation shaft, and then the mounting bracket is fixed on the impeller. When the blade adjustment mechanism is working, it drives the blade rotation shaft to rotate, and the blade rotation shaft drives the dial to rotate. The dial rotates synchronously with the other blades, and the indicator needle points to the angle scale to show the rotation angle of the blade, which facilitates the calibration of the blade rotation angle and ensures the accuracy of the blade rotation angle.

[0008] Furthermore, a base is fixedly connected to the bottom of the dial, and the base can be detachably installed on the top of the blade rotation shaft.

[0009] By adopting the above technical solution, the dial can be detachably mounted on the blade rotation shaft via the base, which facilitates the installation and removal of the dial.

[0010] Furthermore, the top of the blade rotating shaft is provided with bolt holes for mounting the blades, and a through hole is provided in the base corresponding to the bolt holes. A mounting bolt passes through the through hole and is threaded into the bolt hole.

[0011] By adopting the above technical solution, when installing the dial, first align the through hole with the bolt hole, then pass the mounting bolt through the through hole and thread it into the bolt hole, and tighten the mounting bolt. The installation of the dial is quick and convenient, and it can be installed using the existing bolt holes.

[0012] Furthermore, the mounting bracket includes a U-shaped fixing rod, with clamping parts at both ends of the fixing rod. The two clamping parts are located on both sides of the impeller and abut against the outer walls of both sides of the impeller.

[0013] By adopting the above technical solution, the mounting bracket is clamped and fixed to the impeller by the clamping parts on both sides, which makes the operation quick and convenient and does not require drilling for installation, thus not damaging the impeller.

[0014] Furthermore, a vertical shaft is provided at the center of the dial, which is rotatably connected to the dial via a bearing. The top of the vertical shaft is fixedly connected to a fixed rod, and the indicator needle is fixedly connected to the vertical shaft.

[0015] By adopting the above technical solution, the vertical axis is set at the center of the dial, and the indicator needle is fixed on the vertical axis. The vertical axis can ensure that the indicator needle is at the center of the dial, thereby ensuring the accuracy of the angle indication.

[0016] Furthermore, the clamping component includes a threaded rod, which is perpendicular to the outer wall end face of the impeller. The threaded rod passes through the fixed rod and is threadedly connected to the fixed rod. A handwheel is fixedly connected to the end of the threaded rod away from the impeller, and the end of the threaded rod close to the impeller abuts against the outer wall of the impeller.

[0017] By adopting the above technical solution, during installation, turning the handwheel causes the threaded rod to rotate. As the threaded rod rotates, it moves towards the impeller. When the threaded rod presses against the outer wall of the impeller, the installation of the mounting bracket is completed.

[0018] Furthermore, an X-shaped support frame is rotatably connected to one end of the threaded rod near the impeller. Each of the four ends of the support frame is provided with a support foot, which abuts against the outer wall of the impeller.

[0019] By adopting the above technical solutions, the support frame and support feet can increase the contact area between the threaded rod and the outer wall of the impeller, thereby improving the installation stability of the mounting frame.

[0020] Furthermore, the support feet are made of rubber.

[0021] By adopting the above technical solution, the rubber support foot has a certain degree of elasticity, and when the support foot is pressed against the outer wall of the impeller, it can reduce the damage to the outer wall of the impeller.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] (1) During calibration, remove one of the blades from the impeller, first fix the dial on the blade rotation shaft, and then fix the mounting bracket on the impeller. When the blade adjustment mechanism is working, it drives the blade rotation shaft to rotate, and the blade rotation shaft drives the dial to rotate. The dial rotates synchronously with the other blades, and the indicator needle points to the angle scale to show the rotation angle of the blade, which makes it easy to calibrate the rotation angle of the blade and ensure the accuracy of the blade rotation angle.

[0024] (2) When installing the dial, first align the through hole with the bolt hole, then pass the mounting bolt through the through hole and thread it into the bolt hole, and tighten the mounting bolt. The installation of the dial is quick and convenient, and the existing bolt holes can be used for installation.

[0025] (3) The vertical axis is set at the center of the dial and the pointer is fixed on the vertical axis. The vertical axis can ensure that the pointer is at the center of the dial, thereby ensuring the accuracy of the angle indication. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a wind turbine blade angle correction device;

[0028] Figure 2 A cross-sectional view showing the installation state of the calibration device;

[0029] Explanation of reference numerals in the attached drawings: 1. Rotating part; 10. Dial; 11. Angle markings; 12. Base; 13. Through hole; 14. Mounting bolt; 2. Fixed part; 20. Mounting bracket; 200. Fixing rod; 201. Clamping element; 2010. Threaded rod; 2011. Handwheel; 2012. Support frame; 2013. Support foot; 202. Vertical shaft; 21. Indicator needle; 3. Blade rotation shaft; 30. Bolt hole; 4. Impeller. Detailed Implementation

[0030] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The following is in conjunction with the appendix Figure 1 To be continued Figure 2 The present invention will be described in detail with specific embodiments.

[0032] Reference Figures 1-2 The present invention provides a fan blade angle correction device, comprising a rotating part 1 and a fixed part 2. The rotating part 1 includes a scale 10 with angle markings 11 on it. The scale 10 is fixed to the top of the blade rotation shaft 3. The fixed part 2 includes a mounting bracket 20 and an indicator needle 21. The indicator needle 21 is fixedly connected to the mounting bracket 20, which is fixedly mounted on the impeller 4. The scale 10 is rotatably connected to the mounting bracket 20, and the indicator needle 21 points to the angle markings 11.

[0033] During calibration, one of the blades on the impeller 4 is removed. First, the scale 10 is fixed to the blade rotation shaft 3, and then the mounting bracket 20 is fixed to the impeller 4. When the blade adjustment mechanism is working, it drives the blade rotation shaft 3 to rotate. The blade rotation shaft 3 drives the scale 10 to rotate. The scale 10 rotates synchronously with the other blades. The indicator needle 21 points to the angle scale 11 to display the rotation angle of the blade, which facilitates the calibration of the blade rotation angle and ensures the accuracy of the blade rotation angle.

[0034] A base 12 is fixedly connected to the bottom of the dial 10, and the base 12 is detachably mounted on the top of the blade rotation shaft 3. The dial 10 is detachably mounted on the blade rotation shaft 3 via the base 12, which facilitates the installation and removal of the dial 10.

[0035] The top of the blade rotating shaft 3 has a bolt hole 30 for mounting the blade. A through hole 13 is provided in the base 12 corresponding to the bolt hole 30. A mounting bolt 14 passes through the through hole 13 and is threaded into the bolt hole 30. When installing the dial 10, first align the through hole 13 with the bolt hole 30, then pass the mounting bolt 14 through the through hole 13 and thread it into the bolt hole 30, and finally tighten the mounting bolt 14. The installation of the dial 10 is quick and convenient, utilizing the existing bolt hole 30.

[0036] The mounting bracket 20 includes a U-shaped fixing rod 200, with clamping members 201 at both ends. The two clamping members 201 are located on both sides of the impeller 4 and abut against the outer walls of both sides of the impeller 4. The mounting bracket 20 is clamped and fixed to the impeller 4 by the clamping members 201 on both sides. The operation is quick and convenient, and installation does not require drilling, thus not damaging the impeller 4.

[0037] A vertical shaft 202 is located at the center of the dial 10. The vertical shaft 202 is rotatably connected to the dial 10 via a bearing. The top end of the vertical shaft 202 is fixedly connected to a fixing rod 200, and the indicator needle 21 is fixedly connected to the vertical shaft 202. The vertical shaft 202 is positioned at the center of the dial 10, and the indicator needle 21 is fixed to the vertical shaft 202. The vertical shaft 202 ensures that the indicator needle 21 is at the center of the dial 10, thereby ensuring the accuracy of angle indication.

[0038] The clamping component 201 includes a threaded rod 2010, which is perpendicular to the outer wall end face of the impeller 4. The threaded rod 2010 passes through the fixing rod 200 and is threadedly connected to the fixing rod 200. A handwheel 2011 is fixedly connected to the end of the threaded rod 2010 away from the impeller 4, and the end of the threaded rod 2010 near the impeller 4 abuts against the outer wall of the impeller 4. During installation, rotating the handwheel 2011 causes the threaded rod 2010 to rotate. As the threaded rod 2010 rotates, it moves towards the impeller 4. When the threaded rod 2010 presses against the outer wall of the impeller 4, the mounting bracket 20 is installed.

[0039] An X-shaped support frame 2012 is rotatably connected to one end of the threaded rod 2010 near the impeller 4. Each of the four ends of the support frame 2012 is provided with a support foot 2013, which abuts against the outer wall of the impeller 4. The support frame 2012 and the support feet 2013 increase the contact area between the threaded rod 2010 and the outer wall of the impeller 4, thereby improving the installation stability of the mounting bracket 20.

[0040] The support foot 2013 is made of rubber. The rubber support foot 2013 has a certain degree of elasticity, and when the support foot 2013 is pressed against the outer wall of the impeller 4, it can reduce damage to the outer wall of the impeller 4.

[0041] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A wind turbine blade angle correction device, characterized in that, It includes a rotating part and a fixed part. The rotating part includes a dial with angle markings. The dial is fixed to the top of the blade rotation shaft. The fixed part includes a mounting bracket and an indicator needle. The indicator needle is fixedly connected to the mounting bracket, which is fixedly mounted on the impeller. The dial is rotatably connected to the mounting bracket, and the indicator needle points to the angle markings.

2. The wind turbine blade angle correction device according to claim 1, characterized in that, A base is fixedly connected to the bottom of the dial, and the base is detachably installed on the top of the blade rotation shaft.

3. The wind turbine blade angle correction device according to claim 2, characterized in that, The top end of the blade rotation shaft is provided with a bolt hole for mounting the blade. The base is provided with a through hole corresponding to the bolt hole. A mounting bolt passes through the through hole and is threaded into the bolt hole.

4. The wind turbine blade angle correction device according to claim 1, characterized in that, The mounting bracket includes a U-shaped fixing rod, with clamping members at both ends of the fixing rod. The two clamping members are located on both sides of the impeller and abut against the outer walls of both sides of the impeller, respectively.

5. The wind turbine blade angle correction device according to claim 4, characterized in that, A vertical shaft is located at the center of the dial. The vertical shaft is rotatably connected to the dial via a bearing. The top end of the vertical shaft is fixedly connected to the fixed rod. The indicator needle is fixedly connected to the vertical shaft.

6. The wind turbine blade angle correction device according to claim 4, characterized in that, The clamping component includes a threaded rod, which is perpendicular to the outer wall end face of the impeller. The threaded rod passes through the fixing rod and is threadedly connected to the fixing rod. A handwheel is fixedly connected to the end of the threaded rod away from the impeller, and the end of the threaded rod close to the impeller abuts against the outer wall of the impeller.

7. The wind turbine blade angle correction device according to claim 6, characterized in that, The threaded rod is rotatably connected to an X-shaped support frame at one end near the impeller. Each of the four ends of the support frame is provided with a support foot, which abuts against the outer wall of the impeller.

8. The wind turbine blade angle correction device according to claim 7, characterized in that, The support feet are made of rubber.

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