Offshore wind power strain monitoring device

Abstract

The utility model discloses an offshore wind power strain monitoring device, which comprises a vibrating wire strain gauge, and monitoring mounting racks are symmetrically arranged on two sides of the vibrating wire strain gauge; the monitoring frame is composed of a first position adjusting mechanism, two telescopic mechanisms, two angle adjusting mechanisms and two clamping mechanisms. A pressing block capable of moving up and down is arranged on the first position adjusting mechanism; the two telescopic mechanisms are symmetrically arranged on the two sides of the first position adjusting mechanism, and one ends of the two telescopic mechanisms are hinged to the pressing block. The two angle adjusting mechanisms are arranged at the other ends of the two telescopic mechanisms correspondingly, and the two clamping mechanisms are connected with the two angle adjusting mechanisms correspondingly. The clamping mechanism comprises a second position adjusting mechanism and a clamp; according to the device, the vibrating wire strain gauges are fixed on the fan blades through the monitoring mounting frames on the two sides, damage of the method to the fan blades is avoided, the mounting steps are simplified, stress monitoring can be effectively carried out, the device is widely suitable for small fan blades of different shapes and sizes, the mounting difficulty is small, and the mounting cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to an offshore wind power strain monitoring device. Background Art

[0002] With the increasing global emphasis on renewable energy, offshore wind power generation has rapidly developed as a clean and efficient way to obtain energy. However, the operating environment of offshore wind turbines is complex and changeable. The blades, in particular, are constantly subjected to multiple factors such as wind loads and seawater corrosion. Therefore, real-time monitoring of the blade stress state is particularly important.

[0003] Currently, the primary method for stress monitoring on small offshore wind turbine blades is the use of strain gauges. In practice, this typically involves drilling holes in the blades and securing the strain gauges with expansion bolts. While this method can monitor stress, it has significant drawbacks: first, it damages the blade structure, impacting its mechanical properties and service life; second, the drilling and installation process requires complex procedures and specialized technicians, increasing installation costs and complexity. Utility Model Content

[0004] The purpose of the utility model is to provide an offshore wind power strain monitoring device that solves the above technical problems.

[0005] To this end, the technical solution of this utility model is as follows:

[0006] An offshore wind power strain monitoring device includes a vibrating wire strain gauge, with monitoring mounting brackets symmetrically arranged on both sides; a fixing plate is fixed to the bottom of each monitoring mounting bracket, so that the two ends of the vibrating wire strain gauge are respectively fixed to the fixing plates on both sides; each monitoring bracket is composed of a first position adjustment mechanism, two telescopic mechanisms, two angle adjustment mechanisms and two clamping mechanisms; a pressing block that can move up and down is provided on the first position adjustment mechanism; two telescopic mechanisms are symmetrically arranged on both sides of the first position adjustment mechanism, and one end of the two telescopic mechanisms is hingedly connected to the pressing block, so that the setting height of the telescopic mechanism can be adjusted by the first position adjustment mechanism, and the telescopic rod can be relatively The pressing block swings up and down along the vertical plane; the two angle adjustment mechanisms are respectively arranged at the other end of the two telescopic mechanisms, and the two clamping mechanisms are respectively connected to the two angle adjustment mechanisms to adjust their inclination angles on the vertical plane through the angle adjustment mechanisms respectively; each clamping mechanism includes a second position adjustment mechanism and a clamp, the second position adjustment mechanism includes a fixed sleeve connected to the angle adjustment mechanism and a sliding sleeve that can move up and down along the fixed sleeve; the clamp includes a first clamping block and a second clamping block, and the two fix the same side ends on the fixed sleeve and the sliding sleeve respectively in a manner that the clamping surfaces are opposite, so that the distance between the two can be adjusted through the second position adjustment mechanism.

[0007] Furthermore, the first position adjustment mechanism also includes a support block, a first lead screw and two guide rods; wherein, the support block is fixed on the fixed plate; the lead screw of the first lead screw is vertically arranged, and its bottom end is rotatably arranged on the support block, and its top end is connected to the first turning handle; the pressing block is sleeved and fixed on the outside of the lead screw nut of the first lead screw, and two axial through holes are symmetrically opened on it on both sides of the lead screw nut, and the two guide rods are respectively slidably inserted into the two axial through holes, and the bottom ends of the two are fixed on the fixed plate.

[0008] Furthermore, the telescopic mechanism includes a telescopic rod, which is composed of an outer sliding sleeve and an inner sliding sleeve; one end of the outer sliding sleeve is hingedly connected to the pressing block, and one end of the inner sliding sleeve is partially inserted into the inner side of the outer sliding sleeve from the other end of the outer sliding sleeve, and can slide freely relative to the outer sliding sleeve; a plurality of second bolt holes are spaced apart on the tube wall of the outer sliding sleeve, and a first bolt hole is opened on the end wall of the inner sliding sleeve close to the outer sliding sleeve, so that the inner sliding sleeve and the outer sliding sleeve are connected and fixed by bolts sequentially inserted into any of the second bolt holes and the first bolt hole that intersect each other.

[0009] Furthermore, the angle adjustment mechanism includes a fixed shaft and a turntable; the fixed shaft is vertically fixed at the other end of the telescopic mechanism; the turntable is rotatably set at the end of the fixed shaft through a rotating bearing; a plurality of third screw holes are evenly distributed along the circumferential direction on the turntable, and two fourth screw holes are symmetrically opened on the telescopic mechanism located on both sides of the fixed shaft, so that the turntable after the rotation angle is adjusted is fixed to the telescopic mechanism by bolts respectively inserted into the fourth screw holes and the third screw holes on each side.

[0010] Furthermore, the second position adjustment mechanism also includes a second lead screw; the fixed sleeve is a vertically arranged tube body, the top end of which is fixed to the bottom of the rotating part of the angle adjustment mechanism, and a fixed block is fixed on its inner wall; the second lead screw is passed through the fixed sleeve from bottom to top, the top end of which is rotatably set on the fixed block, and the bottom end is fixed with a second handle; the sliding sleeve is sleeved and fixed on the outside of the lead screw nut of the second lead screw, and a protrusion is provided on its side wall; a strip-shaped through hole that can be embedded with the protrusion is opened in the vertical direction on the lower side wall of the fixed sleeve.

[0011] Furthermore, the first clamping block and the second clamping block are both bar-shaped blocks with arc-shaped clamping surfaces processed on one side wall, and are symmetrically and spaced apart on the upper and lower sides of the fixing sleeve with the arc-shaped clamping surfaces facing each other.

[0012] Furthermore, the clamping surface of the first arc-shaped clamping block is covered with a first anti-slip silicone rubber, and the clamping surface of the second arc-shaped clamping block is covered with a second anti-slip silicone rubber.

[0013] Compared with the existing technology, the offshore wind power strain monitoring device uses monitoring mounting frames on both sides to fix the vibrating string strain gauge on the wind turbine blade. The structural setting of the clamp avoids the traditional monitoring method of directly drilling holes and fixing with expansion bolts on the wind turbine blade, and simplifies the installation steps on the wind turbine blade. It not only realizes the fixation of the vibrating string strain gauge on the wind turbine blade to effectively monitor stress, but also significantly reduces the damage to the wind turbine blade structure and extends the service life of the wind turbine blade. At the same time, through the first position adjustment mechanism, telescopic mechanism, angle adjustment mechanism and the second position adjustment mechanism of the clamping mechanism, the monitoring device can be widely applied to small wind turbine blades of different shapes and sizes, and the installation difficulty is small, the installation cost is low, and the operator is convenient to disassemble and install. Its flexibility makes the monitoring device have good application and promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the offshore wind power strain monitoring device of the present invention;

[0015] Figure 2 This is a right side view of the offshore wind power strain monitoring device of the present invention;

[0016] Figure 3 This is a right side sectional view of the offshore wind power strain monitoring device of the present invention;

[0017] Figure 4 for Figure 3 A partial enlarged view of part A. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following embodiments are by no means intended to limit the present invention in any way.

[0019] See also Figure 1 The offshore wind power strain monitoring device includes a vibrating string strain gauge 1 and two monitoring mounting frames symmetrically arranged on both sides of the vibrating string strain gauge 1; each monitoring mounting frame is fixed on a horizontally arranged fixing plate 2; the vibrating string strain gauge 1 is arranged horizontally, and its two ends are respectively fixed to the fixing plates 2 at the bottom of the two monitoring mounting frames, so that the three are connected and fixed as a whole; in actual application, the vibrating string strain gauge 1 is fixed on the wind turbine blade in a manner that fits the wind turbine blade through the monitoring mounting frames connected to its two sides, so as to monitor the strain changes of the wind turbine blade in real time during operation.

[0020] See also Figure 2 and Figure 3Each monitoring mounting bracket includes a first position adjustment mechanism, two telescopic mechanisms, two angle adjustment mechanisms and two clamping mechanisms; among them, the two monitoring mounting brackets located on both sides of the vibrating wire strain gauge 1 have the same structure, and the two are arranged in a manner that the openings of the clamping mechanisms are opposite to each other, and the monitoring device is fixed to the fan blade by clamping the clamping mechanisms on both sides of the fan blade.

[0021] The first position adjustment mechanism includes a support block 3, a first lead screw 4, a pressing block 5 and two guide rods 6; the support block 3 is vertically fixed on the top surface of the fixed plate 2; a mounting groove is provided at the center of the top surface of the support block 3, and a rotating bearing is provided in the mounting groove; the lead screw of the first lead screw 4 is vertically provided, and its bottom end is rotatably assembled in the mounting groove of the support block 3 through the rotating bearing; the pressing block 5 is a rectangular block with a through hole in the center, which is horizontally sleeved and fixed on the outside of the lead screw nut of the first lead screw 4; a first turning handle 7 is installed at the top of the first lead screw 4, so that the lead screw of the first lead screw 4 can be driven to rotate by manually turning the first turning handle 7. In actual application, when the operator rotates the lead screw of the first lead screw 4 through the first turning handle 7, the pressing block 5 moves along the lead screw along with the lead screw nut of the first lead screw 4.

[0022] Two axial through holes are symmetrically provided on the pressing block 5 located on both sides of the screw nut. Two guide rods 6 are slidably inserted into the two axial through holes, and the bottom ends of the two are vertically fixed on the fixed plate 2, so that the pressing block 5 can maintain reciprocating sliding in the vertical direction under the guidance of the two guide rods 6.

[0023] The two telescopic mechanisms are symmetrically arranged on both sides of the pressing block 5; specifically, each telescopic mechanism includes a telescopic rod, which is composed of an outer sleeve 11 and an inner sleeve 12; a first connecting ear is provided at one end of the outer sleeve 11, and a pin hole is provided on the first connecting ear; correspondingly, two second connecting ears are symmetrically arranged on both sides of the pressing block 5, and a pin hole is provided on each second connecting ear in the horizontal direction; the outer sleeve 11 and the pressing block 5 are hingedly connected by a pin shaft passing through the first connecting plate and the second connecting plate, so that the telescopic rod can swing up and down along the vertical plane.

[0024] One end of the inner sleeve 12 is partially inserted into the inner side of the outer sleeve 11 from the other end of the outer sleeve 11, and can slide telescopically relative to the outer sleeve 11, that is, the length of the telescopic rod is adjustable; a plurality of second bolt holes 14 are spaced apart on the tube wall of the outer sleeve 11, and a first bolt hole 15 is opened on the end wall of the inner sleeve 12 on the side adjacent to the outer sleeve 11, so that the inner sleeve 12 and the outer sleeve 11 are connected and fixed by bolts sequentially inserted into any of the second bolt holes 14 and the first bolt holes 15 that intersect each other.

[0025] The angle adjustment mechanism is provided at the other end of the inner sleeve 12 and includes a fixed shaft 16 and a rotating disk 17; Figure 4 A radial through hole is provided on the other end wall of the inner sleeve 12 in the horizontal direction, and the fixed shaft 16 is vertically penetrated and fixed to the end side of the inner sleeve 12 through the radial through hole; the turntable 17 is a circular disk body, the center of which is provided with a mounting hole, so that the turntable 17 is rotatably set at the end of the fixed shaft 16 through a rotating bearing; a plurality of third screw holes 18 are also uniformly distributed along the circumferential direction near the edge of the turntable 17, and correspondingly, two fourth screw holes 19 are symmetrically provided on the tube wall of the inner sleeve 12 on both sides of the fixed shaft 16, so that the turntable 17 after the rotation angle is adjusted is fixed to the inner sleeve 12 by bolts respectively provided in the fourth screw holes 19 and the third screw holes 18 that intersect on each side, so as to maintain the state of the turntable 17 after the rotation angle is adjusted.

[0026] The clamping mechanism includes a second position adjustment mechanism and a clamp; specifically, see Figure 4 ,

[0027] The second position adjustment mechanism includes a fixed sleeve 21, a second lead screw 26 and a sliding sleeve 27; the fixed sleeve 21 is a vertically arranged tubular body, the top of which is vertically fixed to the outer annular surface of the turntable 17, and a fixed block 29 is horizontally fixed on its inner wall; a mounting groove is provided on the bottom surface of the fixed block 29, and a rotating bearing is provided in the mounting groove; the lead screw of the second lead screw 26 is passed through the fixed sleeve 21 from bottom to top, and the top end of the lead screw is rotatably set on the fixed block 29 through the rotating bearing; a second turning handle 28 is fixed to the bottom end of the lead screw of the second lead screw 26, so that the lead screw nut of the second lead screw 26 can be driven up and down by turning the second turning handle 28; the sliding sleeve 27 is sleeved and fixed on the outer side of the lead screw nut of the second lead screw 26, and a protrusion is provided on the outer wall of the sliding sleeve 27; correspondingly, a strip-shaped through hole for embedding the protrusion is provided in the vertical direction on the lower side wall of the fixed sleeve 21, and the protrusion is preferably flush with the outer wall of the fixed sleeve 21;

[0028] The clamp includes a first arc-shaped clamping block 22 and a second arc-shaped clamping block 23. Both arc-shaped clamping blocks are bar-shaped blocks with an arc-shaped clamping surface processed on one side wall. The two arc-shaped clamping blocks are symmetrically and spaced apart on the upper and lower sides of the fixed sleeve 21 with the arc-shaped clamping surfaces facing each other; wherein, the first arc-shaped clamping block 22 is vertically fixed on the outer wall of the fixed sleeve 21, and the second arc-shaped clamping block 23 is arranged perpendicular to the outer wall of the fixed sleeve 21 and fixed on the protrusion of the sliding sleeve 27.

[0029] As a preferred technical solution of this embodiment, the clamping surface of the first arc-shaped clamping block 22 is covered with a first anti-slip silicone rubber 24, and the clamping surface of the second arc-shaped clamping block 23 is covered with a second anti-slip silicone rubber 25, so as to increase the friction of the clamp while reducing the pressure of the clamp on the surface of the wind turbine blade, thereby avoiding damage to the blade during strain monitoring.

[0030] The method of using the offshore wind power strain monitoring device is as follows:

[0031] S1. Clean the installation location of the small wind turbine blade and then install the device along the length of the blade. Specifically, the two fixing plates 2 of the device are placed on both ends of the blade, and the vibrating wire strain gauge 1 is placed at the designated monitoring position on the blade in a manner that fits the blade.

[0032] S2. Turn the first handle 7 to move the adjustment push block 5 downward along the first screw 4 so that the clamps on the monitoring mounting brackets on both sides correspond to the positions of the wing edges on both sides of the wind turbine blade. At the same time, adjust the clamping angles of the clamps on the monitoring mounting brackets on both sides by turning the turntable 17 to adjust the clamping angles of the clamps according to the wing edge slope angles. Then, use bolts to fix the turntable 17 to the inner sleeve 12 to maintain the adjusted clamping angles.

[0033] S3. Adjust the extension length of the inner sleeve 12 on each telescopic tube relative to the outer sleeve 11 so that the first arc-shaped clamping block 22 and the second arc-shaped clamping block 23 are located on the upper and lower sides of the blade wing edge; then rotate the second turning handle 28 to cause the sliding sleeve 27 to drive the second arc-shaped clamping block 23 upward until the first arc-shaped clamping block 22 and the second arc-shaped clamping block 23 are clamped and fixed on the blade wing edge;

[0034] S4. A wireless transmission device is provided on the vibrating wire strain gauge 1 so that the vibrating wire strain gauge 1 is wirelessly connected to the ground data acquisition system through the wireless transmission device, so as to collect the strain information of the wind turbine blade in real time when the wind turbine blade is in working state, so as to realize real-time monitoring of the strain information on the small wind turbine blade.

[0035] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An offshore wind power strain monitoring device, characterized in that: The invention comprises a vibrating wire strain gauge (1), and monitoring mounting frames are symmetrically arranged on both sides of the vibrating wire strain gauge; the bottom of each monitoring mounting frame is fixed on a fixed plate (2), and the two ends of the vibrating wire strain gauge (1) are respectively fixed on the fixed plates (2) on both sides; each monitoring frame is composed of a first position adjustment mechanism, two telescopic mechanisms, two angle adjustment mechanisms and two clamping mechanisms; a pressing block (5) capable of moving up and down is provided on the first position adjustment mechanism; the two telescopic mechanisms are symmetrically arranged on both sides of the first position adjustment mechanism, and one end of the two telescopic mechanisms is hingedly connected to the pressing block (5), so that the setting height of the telescopic mechanism can be adjusted by the first position adjustment mechanism, and at the same time, the telescopic rod can be vertically adjusted relative to the pressing block (5). The two angle adjustment mechanisms are respectively arranged at the other ends of the two telescopic mechanisms, and the two clamping mechanisms are respectively connected to the two angle adjustment mechanisms so as to adjust the tilt angles on the vertical plane respectively through the angle adjustment mechanisms; each clamping mechanism includes a second position adjustment mechanism and a clamp, and the second position adjustment mechanism includes a fixed sleeve (21) connected to the angle adjustment mechanism, and a sliding sleeve (27) capable of moving up and down along the fixed sleeve; the clamp includes a first clamping block (22) and a second clamping block (23), and the two are respectively fixed on the fixed sleeve (21) and the sliding sleeve (27) at the same side ends in a manner that the clamping surfaces are opposite to each other, so as to adjust the distance between the two through the second position adjustment mechanism.

2. The offshore wind power strain monitoring device according to claim 1, characterized in that: The first position adjustment mechanism also includes a support block (3), a first lead screw (4) and two guide rods (6); the support block (3) is fixed on the fixed plate (2); the lead screw of the first lead screw (4) is vertically arranged, the bottom end of which is rotatably arranged on the support block (3), and the top end of which is connected to the first turning handle (7); the pressing block (5) is sleeved and fixed on the outside of the lead screw nut of the first lead screw (4), and two axial through holes are symmetrically opened on both sides of the lead screw nut, and the two guide rods (6) are respectively slidably inserted into the two axial through holes, and the bottom ends of the two guide rods are fixed on the fixed plate (2).

3. The offshore wind power strain monitoring device according to claim 2, characterized in that: The telescopic mechanism comprises a telescopic rod, which is composed of an outer sliding sleeve (11) and an inner sliding sleeve (12); one end of the outer sliding sleeve (11) is hingedly connected to a pressing block (5); one end of the inner sliding sleeve (12) is partially inserted into the inner side of the outer sliding sleeve (11) from the other end of the outer sliding sleeve (11) and can slide freely relative to the outer sliding sleeve (11); a plurality of second bolt holes (14) are spaced apart on the tube wall of the outer sliding sleeve (11), and a first bolt hole (15) is opened on the end wall of the inner sliding sleeve (12) close to the outer sliding sleeve (11), so that the inner sliding sleeve (12) and the outer sliding sleeve (11) are connected and fixed by bolts sequentially inserted into any second bolt hole (14) and the first bolt hole (15) that intersect with each other.

4. The offshore wind power strain monitoring device according to claim 1, characterized in that: The angle adjustment mechanism comprises a fixed shaft (16) and a rotating disk (17); the fixed shaft (16) is vertically fixed to the other end of the telescopic mechanism; the rotating disk (17) is rotatably arranged on the shaft end of the fixed shaft (16) through a rotating bearing; a plurality of third screw holes (18) are evenly distributed along the circumferential direction on the rotating disk (17), and two fourth screw holes (19) are symmetrically opened on the telescopic mechanism located on both sides of the fixed shaft (16), so that the rotating disk (17) after the rotation angle adjustment is fixed to the telescopic mechanism through bolts respectively penetrating the fourth screw holes (19) and the third screw holes (18) on each side.

5. The offshore wind power strain monitoring device according to claim 1, characterized in that: The second position adjustment mechanism also includes a second lead screw (26); the fixed sleeve (21) is a vertically arranged tube body, the top end of which is fixed to the bottom of the rotating component of the angle adjustment mechanism, and a fixed block (29) is fixed on the inner wall of the fixed sleeve; the second lead screw (26) is inserted into the fixed sleeve (21) from bottom to top, the top end of which is rotatably arranged on the fixed block (29), and the bottom end of which is fixed to the second turning handle (28); the sliding sleeve (27) is sleeved and fixed on the outer side of the lead screw nut of the second lead screw (26), and a protrusion is provided on the side wall of the sliding sleeve; a strip-shaped through hole capable of embedding the protrusion is opened in the vertical direction on the lower side wall of the fixed sleeve (21).

6. The offshore wind power strain monitoring device according to claim 5, characterized in that: The first clamping block (22) and the second clamping block (23) are both strip-shaped blocks with arc-shaped clamping surfaces processed on one side wall, and are symmetrically and spaced apart on the upper and lower sides of the fixing sleeve (21) with the arc-shaped clamping surfaces facing each other.

7. The offshore wind power strain monitoring device according to claim 1, characterized in that: The clamping surface of the first clamping block (22) is covered with a first anti-slip silica gel (24), and the clamping surface of the second clamping block (23) is covered with a second anti-slip silica gel (25).

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