Fan blade load sensor

Abstract

The utility model discloses a fan blade load sensor, which relates to the technical field of fan blade monitoring and comprises a sticking bottom plate, and a sticking glue groove is arranged on the lower side surface of the sticking bottom plate. According to the utility model, through the arrangement of the pasting bottom plate, the pressing cover plate, the fixing bolts, the nuts, the wire clamping grooves, the pasting glue grooves and the sealing glue pads, the pasting bottom plate is pasted on the blade, the two ends of the optical fiber type strain sensor and the optical fiber type temperature sensor are fixed on the wire clamping grooves, and the pressing cover plate is pressed and fixed through the fixing bolts and the nuts. The optical fiber type temperature sensor and the optical fiber type strain sensor are tightly attached to the blade, installation steps are simplified, dismounting operation during replacement and maintenance of the optical fiber type temperature sensor and the optical fiber type strain sensor is facilitated, and the distance between the optical fiber type strain sensor and the optical fiber type temperature sensor is accurately controlled. And the temperature measurement accuracy of the optical fiber type temperature sensor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blade monitoring, in particular to a fan blade load sensor. Background Art

[0002] Wind turbines can convert clean wind energy into electrical energy. The stable operation of wind turbines is inseparable from the real-time monitoring of the monitoring system. The generator is monitored in real time through monitoring sensors to ensure the safe and stable operation of various equipment of wind turbines. Among them, the blade load sensor is close to the surface of the blade. The blade will deform under load, and the deformation of the blade will also be affected by the temperature of the blade itself. A temperature sensor needs to be set at the position of the blade load sensor to monitor the blade temperature, and then the load deformation of the blade is temperature compensated through the subsequent calculation module to ensure the accuracy of blade load monitoring.

[0003] When the existing fan blade load sensor is in use, the installation distance between the temperature sensor and the strain sensor cannot be precisely controlled, which affects the accuracy of the temperature sensor in measuring temperature. At the same time, the installation of the temperature sensor and the strain sensor requires them to be pasted on the blades separately, which is not convenient for disassembly when replacement and maintenance are required, making the installation operation of the temperature sensor and the strain sensor complicated. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a fan blade load sensor. By arranging an adhesive base plate, a clamping cover plate, fixing bolts, nuts, a wire clamping groove, an adhesive groove and a sealing rubber pad, the adhesive base plate is adhered to the blade, and both ends of the optical fiber strain sensor and the optical fiber temperature sensor are fixed on the wire clamping groove. The clamping cover plate is clamped and fixed by fixing bolts and nuts, so that the optical fiber temperature sensor and the optical fiber strain sensor are tightly attached to the blade, the installation steps are simplified, and the disassembly operation of the optical fiber temperature sensor and the optical fiber strain sensor is convenient for replacement and maintenance. The distance between the optical fiber strain sensor and the optical fiber temperature sensor is accurately controlled to ensure the accuracy of the optical fiber temperature sensor in measuring temperature, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fan blade load sensor, comprising an adhesive base plate, a fixing bolt is arranged on the side of the adhesive base plate, a nut is passed through the fixing bolt, a clamping cover is arranged on the upper side of the adhesive base plate, a wire clamping groove is arranged on the opposite sides of the adhesive base plate and the clamping cover, an optical fiber temperature sensor is arranged between the two adhesive base plates, the clamping cover is connected to the adhesive base plate by the nut and the fixing bolt, and the adhesive base plate and the clamping cover are clamped and connected to both ends of the optical fiber temperature sensor through the wire clamping groove.

[0006] Furthermore, it also includes an optical fiber strain sensor arranged in parallel with the optical fiber temperature sensor, and both ends of the optical fiber strain sensor are fixed in the wire clamping groove.

[0007] Furthermore, an adhesive groove is provided on the lower side of the adhesive base plate, a sealing adhesive pad is provided at the lower edge of the adhesive base plate, and an external fan blade is glued to the lower side of the adhesive base plate.

[0008] Furthermore, both ends of the optical fiber temperature sensor are connected to the pasting base plate and the pressing cover plate through the wire clamping groove, and both ends of the optical fiber strain sensor are connected to the pasting base plate and the pressing cover plate through the wire clamping groove.

[0009] Furthermore, the sealing rubber pad is adhesively bonded to the adhesive base plate, and the fixing bolt and the nut are connected by threads.

[0010] Furthermore, the adhesive base plate is welded to the fixing bolts, and the adhesive base plate and the pressing cover plate are both made of aluminum alloy.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model provides an adhesive base plate, a clamping cover plate, fixing bolts, nuts, a wire groove, an adhesive groove and a sealing rubber pad, so that the adhesive base plate is adhered to the blade, and both ends of the optical fiber strain sensor and the optical fiber temperature sensor are fixed on the wire groove. The clamping cover plate is clamped and fixed by fixing bolts and nuts, so that the optical fiber temperature sensor and the optical fiber strain sensor are closely attached to the blade, simplifying the installation steps, facilitating the disassembly operation when the optical fiber temperature sensor and the optical fiber strain sensor are replaced and repaired, and the distance between the optical fiber strain sensor and the optical fiber temperature sensor is precisely controlled to ensure the accuracy of the optical fiber temperature sensor in measuring temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a right sectional structural schematic diagram of the pasting bottom plate in the utility model;

[0015] Figure 3 This is a structural schematic diagram of the pasting bottom plate in the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the utility model fixed on the blade.

[0017] In the figure: 1. Paste the bottom plate; 2. Press the cover plate; 3. Fiber optic temperature sensor; 4. Fix bolts; 5. Nuts; 6. Fiber optic strain sensor; 7. Paste the glue groove; 8. Sealing rubber pad; 9. Wire clamping groove; 10. Blade. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The present embodiment provides a technical solution: a wind turbine blade load sensor, comprising an adhesive base plate 1, a fixing bolt 4 is arranged on the upper side of the adhesive base plate 1, a nut 5 is passed through the fixing bolt 4, a pressing cover plate 2 is arranged on the upper side of the adhesive base plate 1, a wire clamping groove 9 is arranged on the opposite sides of the adhesive base plate 1 and the pressing cover plate 2, an optical fiber temperature sensor 3 is arranged between the two adhesive base plates 1, the pressing cover plate 2 is connected to the adhesive base plate 1 through the nut 5 and the fixing bolt 4, and the adhesive base plate 1 and the pressing cover plate 2 are clamped and connected to both ends of the optical fiber temperature sensor 3 through the wire clamping groove 9.

[0020] like Figure 1-4 As shown, a glue groove 7 is provided on the lower side of the pasting base plate 1, and a sealing rubber pad 8 is provided at the lower edge of the pasting base plate 1. The inner side of the glue groove 7 is filled with glue liquid, so that the pasting base plate 1 can be firmly pasted on the blade 10. The sealing rubber pad 8 can improve the tightness of the connection between the pasting base plate 1 and the blade 10, and prevent moisture and dust from penetrating into the gap between the blade 10 and the pasting base plate 1. The optical fiber temperature sensor 3 can accurately measure the temperature of the blade 10, so that the load calculation module at the rear end automatically performs temperature compensation processing on the load of the blade 10 to ensure that the load value of the blade 10 is accurate. The pasting base plate 1 is pasted on the blade 10, and then the two ends of the optical fiber strain sensor 6 and the optical fiber temperature sensor 3 are clamped into the wire clamping groove 9. Finally, the pressing cover plate 2 is pressed on the pasting base plate 1, and the pressing cover plate 2 can be pressed and fixed with a nut 5 and a fixing bolt 4, so that the optical fiber temperature sensor 3 and the optical fiber strain sensor 6 are pressed and fixed, and are close to the blade 10, ensuring the accuracy of temperature monitoring and strain monitoring of the blade 10.

[0021] An optical fiber strain sensor 6 is arranged on one side of the optical fiber temperature sensor 3 , and a blade 10 is arranged below the adhesive base plate 1 .

[0022] An adhesive groove 7 is provided on the lower side of the adhesive base plate 1, a sealing rubber pad 8 is provided at the lower edge of the adhesive base plate 1, the adhesive base plate 1 is glued to the blade 10, and both ends of the optical fiber temperature sensor 3 are connected to the adhesive base plate 1 and the pressing cover plate 2 through the wire slot 9.

[0023] The sealing rubber pad 8 is bonded to the adhesive base plate 1, and the fixing bolts 4 and the nuts 5 are connected by threads.

[0024] The adhesive bottom plate 1 is welded with the fixing bolts 4, and the adhesive bottom plate 1 and the pressing cover plate 2 are both made of aluminum alloy.

[0025] like Figure 1-4 As shown, the lower side of the adhesive base plate 1 is fixed to the blade 10 by gluing, so that the optical fiber strain sensor 6 and the optical fiber temperature sensor 3 can be fixed.

[0026] The working principle of a fan blade load sensor provided by the utility model is as follows: Figure 1-Figure 4 As shown, during installation, first paste the pasting base plate 1 on the blade 10, then fix the two ends of the optical fiber strain sensor 6 and the optical fiber temperature sensor 3 into the wire clamping groove 9, and finally press the clamping cover plate 2 on the pasting base plate 1. The clamping cover plate 2 can be pressed and fixed with the nut 5 and the fixing bolt 4, so that the optical fiber temperature sensor 3 and the optical fiber strain sensor 6 are pressed and fixed and tightly attached to the blade 10, thereby ensuring the accuracy of temperature monitoring and strain monitoring of the blade 10. When the sensor needs to be replaced, the nut 5 is removed from the fixing bolt 4, and then the clamping cover plate 2 can be removed from the pasting base plate 1, and then the sensor can be replaced.

[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fan blade load sensor, comprising a bonding base plate (1), characterized in that: A fixing bolt (4) is arranged on the upper side of the pasting base plate (1), a nut (5) is passed through the fixing bolt (4), a clamping cover plate (2) is arranged on the upper side of the pasting base plate (1), a wire clamping groove (9) is arranged on the opposite sides of the pasting base plate (1) and the clamping cover plate (2), an optical fiber temperature sensor (3) is arranged between the two pasting base plates (1), the clamping cover plate (2) is connected to the pasting base plate (1) through the nut (5) and the fixing bolt (4), and the pasting base plate (1) and the clamping cover plate (2) are clamped and connected to the two ends of the optical fiber temperature sensor (3) through the wire clamping groove (9).

2. A fan blade load sensor according to claim 1, characterized in that: It also comprises an optical fiber strain sensor (6) arranged in parallel with the optical fiber temperature sensor (3), and both ends of the optical fiber strain sensor (6) are clamped in the wire clamping groove (9).

3. A fan blade load sensor according to claim 2, characterized in that: The lower side of the adhesive base plate (1) is provided with an adhesive groove (7), the lower edge of the adhesive base plate (1) is provided with a sealing adhesive pad (8), and the lower side of the adhesive base plate (1) is glued with an external fan blade (10).

4. A fan blade load sensor according to claim 2, characterized in that: Both ends of the optical fiber temperature sensor (3) are connected to the adhesive base plate (1) and the pressing cover plate (2) via the wire clamping groove (9), and both ends of the optical fiber strain sensor (6) are connected to the adhesive base plate (1) and the pressing cover plate (2) via the wire clamping groove (9).

5. The fan blade load sensor according to claim 3, characterized in that: The sealing rubber pad (8) is adhesively bonded to the adhesive base plate (1), and the fixing bolt (4) and the nut (5) are connected via threads.

6. A fan blade load sensor according to claim 1, characterized in that: The adhesive base plate (1) is welded to the fixing bolts (4); the adhesive base plate (1) and the pressing cover plate (2) are both made of aluminum alloy.

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