A blade locking device for wind turbines

Abstract

The present invention relates to a blade locking device for a wind turbine generator set, comprising a mounting frame, an adjusting locking mechanism and a fixed locking mechanism, wherein the adjusting locking mechanism is arranged on a hub web through the mounting frame, and the fixed locking mechanism is arranged on the mounting frame on the left side of the adjusting locking mechanism. The blade locking device for a wind turbine generator set of the present invention has an adjusting locking mechanism, through which the angle of the rotor inner gear ring can be finely adjusted so that the fixed locking mechanism can lock it, and the rotor inner gear ring can be locked once while adjusting the rotor inner gear ring, the operation is relatively simple, the angle of the inner gear ring is convenient to adjust, the limitation and the difficulty of operation are relatively small, the angle of the rotor inner gear ring is finely adjusted, it is convenient for the fixed locking mechanism to lock it, and it is easy to use, and the present invention also has a fixed locking mechanism, through which the rotor inner gear ring is locked twice, thereby effectively enhancing the locking strength, enhancing the reliability of the device, and achieving a strong locking effect.

Description

Technical Field

[0001] The invention belongs to the field of installation and maintenance of wind turbines, and specifically relates to a blade locking device, and in particular to a blade locking device for a wind turbine. Background Art

[0002] Wind power generation is the conversion of wind kinetic energy into electrical energy. Wind energy is a clean, pollution-free, renewable energy source that has been used by people for a long time, mainly through windmills to pump water, grind flour, etc. People are interested in how to use wind to generate electricity. Wind power generation is very environmentally friendly and has huge wind energy reserves. Therefore, it is increasingly valued by countries around the world. The device required for wind power generation is called a wind turbine. This wind turbine can be roughly divided into three parts: a wind rotor (including a tail rudder), a generator, and a tower.

[0003] When a wind turbine is being installed, unstable blades can easily cause the lifting machinery to shake, and shaking of the lifting machinery can easily cause the lifting machinery to tip over, resulting in a safety accident. Therefore, when the impeller and blades are hoisted, the blades need to be fixed to the impeller to prevent the blades from rotating during the hoisting process, causing safety accidents and property losses. Most of the locking devices used for blades in the prior art fix the wind wheel by inserting a retaining pin into a locking hole on the wind wheel. This method has limitations and is difficult to implement. The retaining pin is extremely difficult to insert into the locking hole, and the wind wheel angle needs to be adjusted multiple times, which is inconvenient to use. In addition, the existing locking device can only lock it once, does not have a secondary locking mechanism, and the locking effect is poor. Therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, a blade locking device for a wind turbine is provided, which can effectively solve the limitations of the locking structure of the retaining pin in the prior art and the difficulty in operation, the retaining pin needs to adjust the wind wheel angle multiple times before it can be inserted into the locking hole, it is inconvenient to use, the existing locking device can only lock once, does not have a secondary locking mechanism, and has a poor locking effect.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a blade locking device for a wind turbine, comprising a mounting frame, an adjusting locking mechanism and a fixed locking mechanism, wherein the adjusting locking mechanism is arranged on the hub belly through the mounting frame, and the fixed locking mechanism is arranged on the mounting frame on the left side of the adjusting locking mechanism, the mounting frame comprises a retaining frame and a cover plate, the retaining frame is fixed on the hub belly by bolts, the cover plate is connected to the retaining frame and the hub belly by bolts, and a visual window is opened on the cover plate.

[0006] Furthermore, the adjustment locking mechanism includes an adjustment gear, a worm, a telescopic rod, a worm shaft, a sliding frame and a sliding part. The adjustment gear is rotatably arranged in the middle of the fixing frame and the cover plate. The left end of the worm is provided with a telescopic rod, and the right end is provided with a worm shaft. The telescopic rod and the worm shaft are connected to the sliding frame through a sliding part, and the worm shaft is axially slidably connected to the sliding part.

[0007] Furthermore, the fixed locking mechanism includes a retaining tooth plate, an adjusting hand wheel and a spring. The retaining tooth plate is slidably arranged between the retaining frame and the cover plate. The adjusting hand wheel is threadedly connected and passes through the top rear end of the retaining frame to rotatably connect the retaining tooth plate. The spring is arranged between the retaining tooth plate and the retaining frame, and the spring is a compression spring.

[0008] Furthermore, a rectangular window is provided at the top right side of the retaining frame for the adjustment gear of the adjustment locking mechanism to pass through.

[0009] Furthermore, a positioning frame and a lifting frame are provided on the top of the sliding frame, the positioning frame is fixedly provided on the sliding frame, the support rods at the left and right ends of the lifting frame pass through the positioning frame and the sliding frame and are fixedly connected to the sliding member, a retaining handwheel is provided on the lifting frame, the retaining handwheel is threadedly connected and passes through the middle part of the lifting frame and is rotatably connected to the positioning frame, and a crank handle is also provided on the left side of the worm shaft, and the crank handle is detachably connected to the worm shaft.

[0010] Furthermore, the side portion of the sliding frame is hingedly arranged on the retaining frame, and the other side is connected to the retaining frame by a buckle, and the sliding member is fixedly connected to the sliding frame.

[0011] Furthermore, the side of the retaining tooth plate is provided with a limiting protrusion, the inner side of the retaining frame and the cover plate is provided with a limiting slide groove, the limiting protrusion and the limiting slide groove are in corresponding positions, and the retaining tooth plate is slidably arranged in the limiting slide groove on the inner side of the retaining frame and the cover plate through the limiting protrusion on its side. The locking structure of the retaining pin has limitations and is difficult to operate. The retaining pin needs to adjust the wind wheel angle several times before it can be inserted into the locking hole. It is not convenient to use. The existing locking device can only be locked once, does not have a secondary locking mechanism, and has a poor locking effect.

[0012] Beneficial effects of a blade locking device for a wind turbine according to the present invention:

[0013] 1. The blade locking device for a wind turbine of the present invention has an adjusting locking mechanism. The worm shaft is rotated by shaking the crank of the adjusting locking mechanism. The rotation of the worm shaft drives the worm to rotate. The rotation of the worm drives the adjusting gear to rotate. The rotation of the adjusting gear drives the gear inside the hub to rotate, thereby fine-tuning the gear inside the hub so that the fixed locking mechanism can lock it. The adjusting locking mechanism of the device can lock the inner gear ring of the blade while adjusting the inner gear ring of the blade. The operation is relatively simple, and the angle of the inner gear ring is relatively convenient. The limitations and operating difficulty are relatively small. The angle of the inner gear ring of the blade is fine-tuned by the adjusting locking mechanism, which is convenient for the fixed locking mechanism to lock it, and it is easy to use.

[0014] 2. The blade locking device for a wind turbine according to the present invention also has a fixed locking mechanism. The fixed tooth plate can be driven to move by rotating the adjusting hand wheel of the fixed locking mechanism. The fixed tooth plate can slide up and down under the action of the limiting slide groove and the limiting protrusion. After the rotor inner gear ring is adjusted by adjusting the locking mechanism, the adjusting hand wheel can be rotated to make the fixed tooth plate lock the rotor inner gear ring for a second time, thereby effectively enhancing the locking strength, enhancing the reliability of the device, and achieving a strong locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of a blade locking device for a wind turbine generator system according to the present invention;

[0016] Figure 2 It is a front view structural schematic diagram of the internal structure of a blade locking device for a wind turbine generator set after removing the cover plate of the device;

[0017] Figure 3 It is an enlarged schematic diagram of the internal structure of a blade locking device for a wind turbine generator system according to the present invention;

[0018] Figure 4 It is a side structural cross-sectional schematic diagram of Embodiment 2 of a blade locking device for a wind turbine generator system according to the present invention.

[0019] In the figure:

[0020] 1-mounting frame: 101-retaining frame, 102-cover plate, 103-visible window, 104-rectangular window, 105-limiting slide groove;

[0021] 2-adjusting and locking mechanism: 201-adjusting gear, 202-worm, 203-telescopic rod, 204-worm shaft, 205-sliding frame, 206-sliding member, 207-positioning frame, 208-lifting frame, 209-support rod, 210-retaining hand wheel, 211-crank handle;

[0022] 3-Fixed locking mechanism: 301-retaining tooth plate, 302-adjusting hand wheel, 303-spring, 304-limiting convex block;

[0023] 4- Hub belly plate. DETAILED DESCRIPTION

[0024] The blade locking device for a wind turbine according to the present invention will be described in more detail below with reference to the accompanying drawings and through specific implementations.

[0025] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Example 1

[0027] See also Figure 1 , Figure 3, a blade locking device for a wind turbine generator system, comprising a mounting frame 1, an adjusting locking mechanism 2 and a fixed locking mechanism 3. The blade locking device for a wind turbine generator system of the present invention has an adjusting locking mechanism, through which the angle of the inner gear ring of the rotor can be finely adjusted so that the fixed locking mechanism can lock it. The adjusting locking mechanism of the device can lock the inner gear ring of the rotor once while adjusting the inner gear ring of the rotor. The operation is relatively simple, and the angle of the inner gear ring is relatively convenient to adjust. The limitations and operating difficulties are relatively small. The angle of the inner gear ring of the rotor can be finely adjusted by the adjusting locking mechanism, which is convenient for the fixed locking mechanism to lock it, and is easy to use. The device also has a fixed locking mechanism, through which the inner gear ring of the rotor is locked twice, thereby effectively enhancing the locking strength, enhancing the reliability of the device, and achieving a strong locking effect. The adjusting locking mechanism 2 is arranged on the hub web 4 through the mounting frame 1, and the fixed locking mechanism 3 is arranged on the mounting frame 1 on the left side of the adjusting locking mechanism 2.

[0028] See also Figure 1 , Figure 3 The mounting frame 1 includes a retaining frame 101 and a cover plate 102. The retaining frame 101 is fixed on the hub belly plate 4 by bolts. The cover plate 102 is connected to the retaining frame 101 and the hub belly plate 4 by bolts. The retaining frame is used to install a fixed locking mechanism and an adjustable locking mechanism. A viewing window 103 is provided on the cover plate 102, through which the relative position between the rotor inner gear ring and the fixed locking mechanism can be observed. A rectangular window 104 is provided on the top right side of the retaining frame 101 for the adjustment gear 201 of the adjustment locking mechanism 2 to pass through, so as to facilitate the installation of the adjustment gear.

[0029] See also Figure 1 , Figure 2 , Figure 3 The adjusting locking mechanism 2 comprises an adjusting gear 201, a worm 202, a telescopic rod 203, a worm shaft 204, a sliding frame 205 and a sliding member 206. The adjusting gear 201 is rotatably arranged in the middle of the fixing frame 101 and the cover plate 102. The adjusting gear is used to adjust the angle of the inner gear ring of the rotor. The left end of the worm 202 is provided with a telescopic rod 203. The telescopic rod is used to control the axial position of the worm, so that the axial position of the worm is adjusted to make it mesh with the adjusting gear, thereby transmitting the adjusting gear. The right end is provided with a worm shaft 204. The telescopic rod 203 and the worm shaft 204 are connected to the sliding frame 205 through a sliding member 206. The connection through the sliding member facilitates the upward and downward sliding displacement of the telescopic rod, the worm and the worm shaft. The worm shaft 204 is axially slidably connected to the sliding member 206, so as to adjust the relative position of the worm and the adjusting gear. The top of the sliding frame 205 is provided with The positioning frame 207 and the lifting frame 208, the positioning frame 207 is fixedly arranged on the sliding frame 205, the support rods 209 at the left and right ends of the lifting frame 208 penetrate the positioning frame 207 and the sliding frame 205 and are fixedly connected to the sliding member 206, and the lifting frame 208 is provided with a retaining handwheel 210, the retaining handwheel 210 is threadedly connected and penetrates the middle part of the lifting frame 208 and is rotatably connected to the positioning frame 207, the retaining handwheel, the lifting frame and the positioning frame are used in combination, and the lifting frame can be driven to rise and fall by rotating the retaining handwheel, thereby adjusting the height position of the telescopic rod, the worm and the worm shaft, so as to facilitate the worm to rise and fix the height position of the worm when the inner gear ring of the rotor is not locked, and a crank handle 211 is also provided on the left side of the worm shaft 204, the crank handle 211 is detachably connected to the worm shaft 204, and the crank handle is used to shake the worm shaft to drive the worm to rotate the transmission adjustment gear.

[0030] See also Figure 2 , Figure 3The fixed locking mechanism 3 includes a retaining tooth plate 301, an adjusting hand wheel 302 and a spring 303. The retaining tooth plate 301 is slidably arranged between the retaining frame 101 and the cover plate 102. The retaining tooth plate is used to fix the inner gear ring of the rotor. The adjusting hand wheel 302 is threadedly connected and passes through the top rear end of the retaining frame 101 to be rotatably connected to the retaining tooth plate 301. The height of the retaining tooth plate can be adjusted by adjusting the hand wheel, so that the retaining tooth plate can be raised when the inner gear ring of the rotor is not locked. The spring 303 is arranged between the retaining tooth plate 301 and the retaining frame 101. The spring 303 is a compression spring, which is used to press the retaining tooth plate to prevent the inner gear ring of the rotor from rotating when the adjusting hand wheel breaks, thereby ensuring the fixation of the retaining tooth plate. A limiting protrusion 304 is arranged on the side of the retaining tooth plate 301, and a limiting slide groove 105 is arranged on the inner side of the retaining frame 101 and the cover plate 102. The limiting protrusion 304 and the limiting slide groove 105 correspond in position. The retaining tooth plate 301 is slidably arranged in the limiting slide groove 105 on the inner side of the retaining frame 101 and the cover plate 102 through the limiting protrusion 304 on its side, so as to facilitate the sliding of the retaining tooth plate.

[0031] This device is based on the method of using a blade locking device for a wind turbine: when using this device, turn the retaining handwheel, and the rotation of the retaining handwheel drives the lifting frame to rise and fall. The lowering of the lifting frame drives the telescopic rod, the worm and the worm shaft to fall until the worm engages with the adjusting gear, stop turning the retaining handwheel, install the crank handle on the right side of the worm shaft, shake the worm shaft, the rotation of the worm shaft drives the worm to rotate, the rotation of the worm drives the adjusting gear to rotate, the rotation of the adjusting gear drives the inner gear ring of the rotor to rotate, thereby adjusting the angle of the inner gear ring of the rotor, and when the inner gear ring of the rotor rotates to correspond to the position of the retaining tooth plate of the fixed locking mechanism, stop shaking. Crank the handle to complete the angle adjustment of the inner gear ring of the rotor and the primary locking of the inner gear ring of the rotor, turn the adjusting handwheel, and the adjusting handwheel will drive the retaining tooth plate to descend until the retaining tooth plate descends to mesh with the inner gear ring of the rotor, stop turning the adjusting handwheel, and complete the secondary locking of the inner gear ring of the rotor. When the axial position of the adjusting gear and the worm gear do not correspond and cannot mesh, start the telescopic rod on the left side of the worm gear, and the telescopic rod will be extended and retracted to drive the worm gear and the worm gear shaft to adjust the axial position. When it is adjusted to a relative position that can mesh with the adjusting gear, stop the telescopic rod, and then adjust the height position of the worm gear to make the worm gear mesh with the adjusting gear.

[0032] Example 2

[0033] See also Figure 4The adjusting locking mechanism 2 comprises an adjusting gear 201, a worm 202, a telescopic rod 203, a worm shaft 204, a sliding frame 205 and a sliding member 206. The adjusting gear 201 is rotatably arranged in the middle of the retaining frame 101 and the cover plate 102. The adjusting gear is used to adjust the angle of the inner gear ring of the rotor. The left end of the worm 202 is provided with a telescopic rod 203, which is used to control the axial position of the worm, so that the axial position of the worm is adjusted to make it mesh with the adjusting gear, thereby transmitting the adjusting gear. The right end is provided with a worm shaft 204. The telescopic rod 203 and the worm shaft 204 are connected to the sliding frame 205 through the sliding member 206. The worm shaft 204 is axially slidably connected to the sliding member 206, so as to adjust the relative position of the worm and the adjusting gear. Figure 4 , which is different from Example 1, is that the side of the sliding frame 205 is hingedly arranged on the fixing frame 101 (not marked in the figure), and the sliding frame is hingedly connected to the fixing frame to facilitate adjustment of the worm position. When the adjusting gear is not transmitted, the sliding frame can be flipped to the side, so that the worm and the adjusting gear are out of meshing state, and the other side is connected to the fixing frame 101 by a buckle (not marked in the figure) to facilitate locking the position of the sliding frame, and the sliding member 206 is fixedly connected to the sliding frame 205.

[0034] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by a person of ordinary skill in the field to which the invention belongs. The use of "one" or "an" and other similar words in the specification and claims of this application does not necessarily indicate a quantitative limitation. "Include" or "comprises" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0035] The exemplary implementation modes of the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various combinations of the technical features and structures proposed in the present invention can be made without exceeding the protection scope of the present invention.

Claims

1. A blade locking device for a wind turbine, characterized in that: It includes a mounting frame, an adjustment locking mechanism and a fixed locking mechanism, wherein the adjustment locking mechanism is arranged on the hub web through the mounting frame, and the fixed locking mechanism is arranged on the mounting frame on the left side of the adjustment locking mechanism, and the mounting frame includes a retaining frame and a cover plate, wherein the retaining frame is fixedly arranged on the hub web by bolts, and the cover plate is connected to the retaining frame and the hub web by bolts, and a visual window is opened on the cover plate; The adjusting locking mechanism comprises an adjusting gear, a worm, a telescopic rod, a worm shaft, a sliding frame and a sliding member, wherein the adjusting gear is rotatably arranged at the middle of the fixing frame and the cover plate, the telescopic rod is arranged at the left end of the worm, and the worm shaft is arranged at the right end, the telescopic rod and the worm shaft are connected to the sliding frame through the sliding member, and the worm shaft is axially slidably connected to the sliding member; A positioning frame and a lifting frame are arranged on the top of the sliding frame, the positioning frame is fixedly arranged on the sliding frame, the support rods at the left and right ends of the lifting frame penetrate the positioning frame and the sliding frame and are fixedly connected to the sliding member, a retaining hand wheel is arranged on the lifting frame, the retaining hand wheel is threadedly connected and penetrates the middle part of the lifting frame and is rotatably connected to the positioning frame, and a crank handle is also arranged on the left side of the worm shaft, and the crank handle is detachably connected to the worm shaft; The side of the sliding frame is hingedly arranged on the retaining frame, and the other side is connected to the retaining frame by a buckle; The fixed locking mechanism includes a retaining tooth plate, an adjusting hand wheel and a spring, wherein the retaining tooth plate is slidably arranged between the retaining frame and the cover plate, the adjusting hand wheel is threadedly connected and passes through the top rear end of the retaining frame to be rotatably connected to the retaining tooth plate, and the spring is arranged between the retaining tooth plate and the retaining frame, and the spring is a compression spring; The top right side of the retaining frame is provided with a rectangular window for the adjusting gear of the adjusting locking mechanism to pass through; A limiting protrusion is arranged on the side of the retaining tooth plate, and a limiting sliding groove is opened on the inner side of the retaining frame and the cover plate. The limiting protrusion and the limiting sliding groove are positioned correspondingly, and the retaining tooth plate is slidably arranged in the limiting sliding groove on the inner side of the retaining frame and the cover plate through the limiting protrusion on its side.

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