Blade locking device for a wind power station wind turbine

Abstract

The present invention discloses a blade locking device for a wind power station wind turbine unit, which includes a first locking disc and a second locking disc. A protruding plate with a locking jack is connected to the first locking disc. An arc plate with a clamping groove is connected to the second locking disc. A slider is slidably connected to the arc plate, and an elastic buffer block is connected between the slider and the arc plate. A blocking push plate and a locking insertion rod driven by a first electric push rod and a second electric push rod extend from the slider. The second electric push rod is connected in series with a touch switch through a wire and is connected in parallel with the first electric push rod to a variable-direction DC power supply. A clamping block that is in extrusion fit with the touch switch extends from the lower end of the slider, and a pull rope is connected between the clamping block and the blocking push plate. In the use of the present invention, the locking insertion rod and the locking jack are aligned through the protruding plate, improving the locking work efficiency, and the impact force of the protruding plate is absorbed by the elastic deformation of the elastic buffer block, reducing the torque load borne by the locking insertion rod when inserted into the locking jack.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade locking, and specifically provides a blade locking device for wind farm wind turbines. Background Art

[0002] At present, China's wind energy industry is in a stage of rapid development. With the continuous increase in the capacity of wind turbines, the weight of each component of the wind turbine is getting heavier, the installation height is getting higher, and the installation difficulty is constantly increasing. The wind turbine generator sets are in a harsh environment. To extend the service life of the units, regular maintenance and overhaul are particularly important. To ensure the safety of maintenance personnel, in addition to requiring personnel to correctly use working equipment and all protective equipment, the safety design of wind turbine generator sets is also crucial. If the blades rotate during the impeller assembly and hoisting process, it will damage the stability of the hoisting system and is extremely likely to cause a serious accident of the lifting machinery tipping over due to instability. Therefore, it is necessary to firmly lock the three blades during the impeller assembly and hoisting process to ensure safety. In addition, during the later blade maintenance or when the operation and maintenance personnel enter the hub for work, it is also necessary to lock the impeller and the blades to ensure the safety of the equipment and personnel.

[0003] In the prior art, a blade locking device applied to wind farm wind turbines with the publication number of "CN109505733B" includes a locking disc and an electric locking mechanism. The locking disc is installed between the blade bearing and the blade root of the wind farm wind turbine. A convex portion extending towards the center of the circle is provided on the inner edge of the locking disc, and a bushing is provided on the convex portion. The electric locking mechanism includes a guide seat installed on the hub web of the wind farm wind turbine and an electric push rod provided in the guide seat. The top of the guide seat is a guide hole, and a locking pin drivingly connected to the electric push rod is provided in the guide hole. The locking is achieved by pushing the locking pin into the bushing of the locking disc through the electric push rod.

[0004] However, the prior art still has relatively large defects. For example: 1. The above-mentioned technology requires the locking pin and the bushing to be aligned for locking, that is, it is necessary to manually rotate and adjust the blade to the accurate position to perform the locking work. The locking process is time-consuming and laborious, and it is not applicable to complex and harsh typhoon weather. 2. The locking process of the above-mentioned technology is a one-time jamming. The bushing and the locking pin need to bear the torsion of the blade rotation at one time, so that the bushing and the locking pin are easily damaged due to excessive torsion during the locking process. Moreover, the one-time jamming locking operation has high requirements on the strength and toughness of the materials used for the bushing and the locking pin, resulting in high costs for the bushing and the locking pin. Summary of the Invention

[0005] The purpose of the present invention is to provide a blade locking device for wind farm wind turbines to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A blade locking device for a wind power generator set, comprising a first locking disc and a second locking disc fixedly connected to the outer ring and inner ring of a bearing respectively. The first locking disc is fixedly connected with a protruding plate extending above the second locking disc, and a locking insertion hole is formed in the protruding plate. The second locking disc is fixedly connected with an arc plate having a slot formed at the upper end of one end, and a slider is slidably connected above the arc plate along its arc. An elastic buffer block is fixedly connected between the slider and the arc plate;

[0008] A blocking push plate and a locking insertion rod that slides upward and cooperatively inserts into the locking insertion hole extend upward in the slider. The protruding plate pushes the blocking push plate to slide towards the slot. A first electric push rod and a second electric push rod for driving the blocking push plate and the locking insertion rod to slide up and down respectively are arranged in the slider. The second electric push rod is connected in series with a touch switch through a wire and is connected in parallel with the first electric push rod to a reversing DC power supply;

[0009] An extending slot with a block that slides up and down inside is formed at the lower end of the slider. A block elastic connecting rod is fixedly connected between the block and the inner wall of the extending slot. The touch switch is fixedly connected to the top wall inside the extending slot and is disconnected under the pressure of the block, and the block extends downward into the slot to close the touch switch. A pull rope is fixedly connected between the block and the blocking push plate, and the blocking push plate slides downward and pulls the block to slide upward through the pull rope.

[0010] Preferably, a reversing controller for changing the current direction of the reversing DC power supply is arranged on the reversing DC power supply, and the reversing controller is signal-connected to an external signal transmitter.

[0011] Preferably, mounting blocks are fixedly connected to both ends of the arc plate, and the mounting blocks and the second locking disc are detachably fixedly connected by tightening bolts.

[0012] Preferably, wing connecting plates are fixedly connected to both ends of the arc plate, and an arc-shaped connecting rod is fixedly connected between the wing connecting plates at both ends. The slider is fixedly connected with a guiding connecting plate, and a guiding through slot for the arc-shaped connecting rod to slide through is formed in the guiding connecting plate.

[0013] Preferably, the elastic buffer block is fixedly connected between the guiding connecting plate and one wing connecting plate, and the elastic buffer block is slidably sleeved outside the arc-shaped connecting rod.

[0014] Preferably, wing connecting plates are fixedly connected to both the inner and outer sides of both ends of the arc plate, and arc-shaped connecting rods are fixedly connected between the wing connecting plates located on the same inner or outer side of the arc plate. The slider is fixedly connected with two guiding connecting plates for the arc-shaped connecting rods to pass through one by one.

[0015] Preferably, the slider is provided with a first opening groove and a second opening groove for slidably arranging a blocking push plate and a locking insertion rod up and down inside, respectively, and the first opening groove is located between the clamping groove and the second opening groove, and the first electric push rod and the second electric push rod are respectively detachably and fixedly installed on the inner bottom walls of the first opening groove and the second opening groove.

[0016] Preferably, the slider is provided with an empty groove for slidably arranging a pull rope connecting plate up and down inside, and a pull rope is fixedly connected between the upper end of the pull rope connecting plate and the blocking push plate, and no less than two pull ropes are fixedly connected between the lower end of the pull rope connecting plate and the clamping block.

[0017] Preferably, the elastic connecting rod of the clamping block is fixedly connected between the inner top wall of the protruding groove and the clamping block, and a guiding insertion rod is fixedly connected to the inner top wall of the protruding groove and slides downward through the elastic connecting rod of the clamping block and extends into the clamping block, and the clamping block is provided with a guiding slot for the guiding insertion rod to slide and insert.

[0018] Preferably, the slider is provided with a power supply installation groove with an opening on its end face, and the variable-direction DC power supply is detachably installed in the power supply installation groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The blade locking device for the wind power station fan unit of the present invention enables the slider to slide together with the protruding plate through the setting of the protruding plate, and enables the locking insertion rod and the locking insertion hole to be kept vertically aligned, facilitating the locking insertion rod to extend into the locking insertion hole for locking and fixing, significantly improving the locking efficiency, and through the cooperative setting of the elastic buffer block, the clamping block, the clamping groove and the touch switch, after the slider moves a certain distance along with the protruding plate, the locking insertion rod extends out for locking and fixing, and the elastic deformation of the elastic buffer block is used to absorb the impact force of the protruding plate, achieving the effect of gradually absorbing and reducing the rotational torque of the blade, reducing the torque load borne by the locking insertion rod when inserted into the locking insertion hole subsequently, thereby improving the service life of the locking insertion rod and the protruding plate, and the material standard of the locking insertion rod and the protruding plate can be appropriately reduced without affecting the normal use, thereby reducing the production and manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic top view of the overall structure of the present invention;

[0022] Figure 2 is Figure 1 an enlarged schematic view of the middle arc plate and its connection structure;

[0023] Figure 3 It is a schematic view of the protruding plate pushing the blocking push plate to move in the present invention;

[0024] Figure 4 It is a schematic view of locking and fixing between the first locking disc and the second locking disc in the present invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the slider and its connection structure in the present invention;

[0026] Figure 6 This is a cross-sectional schematic diagram of the protruding plate pushing the blocking push plate to slide in the present invention;

[0027] Figure 7 For Figure 6 the enlarged schematic diagram of the circuit in

[0028] Figure 8 This is a schematic diagram of the locking plug rod extending into the locking jack in the present invention;

[0029] Figure 9 For Figure 8 the enlarged schematic diagram of the clamping block extending into the clamping groove in

[0030] Figure 10 This is a schematic diagram of the internal structure of the slider after the current direction of the variable-direction DC power supply is changed in the present invention.

[0031] In the figure: 1 first locking disc, 2 second locking disc, 3 protruding plate, 31 locking jack, 4 arc plate, 41 clamping groove, 5 slider, 51 protruding groove, 52 first opening groove, 53 second opening groove, 54 empty groove, 55 power supply installation groove, 6 elastic buffer block, 7 blocking push plate, 8 locking plug rod, 9 first electric push rod, 10 second electric push rod, 11 wire, 12 variable-direction DC power supply, 13 touch switch, 14 variable-direction controller, 15 clamping block, 151 guiding slot, 16 clamping block elastic connecting rod, 17 pulling rope, 18 mounting block, 19 tightening bolt, 20 flank connecting plate, 21 arc-shaped connecting rod, 22 guiding connecting plate, 221 guiding through slot, 23 pulling rope connecting plate, 24 guiding plug rod. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1-10 , the present invention provides a technical solution:

[0034] Embodiment 1:

[0035] A blade locking device for a wind power generator set of a wind turbine, comprising a first locking disc 1 and a second locking disc 2 that are annular and concentric. The first locking disc 1 is detachably and fixedly connected above the outer ring of the bearing by bolts, and the second locking disc 2 is detachably and fixedly connected above the inner ring of the bearing by bolts. When installing the fan assembly, the blade and the hub are respectively fixedly installed on the outer ring of the bearing and the inner ring of the bearing. Through the locking and fixing between the first locking disc 1 and the second locking disc 2, relative rotation between the outer ring of the bearing and the inner ring of the bearing is prevented, and thus the blade cannot rotate relative to the hub, achieving the locking and fixing of the blade;

[0036] At least one protruding plate 3 is fixedly connected to the inner wall of the first locking disc 1. In this embodiment, two protruding plates 3 are fixedly connected to the inner wall of the first locking disc 1 at intervals. After one protruding plate 3 is damaged, the other protruding plates 3 can still achieve the locking and fixing effect. The protruding plate 3 extends towards the center of the second locking disc 2 and extends above the second locking disc 2. And a locking insertion hole 31 that penetrates up and down is provided at one end of the protruding plate 3 that extends above the second locking disc 2. Installation blocks 18 are fixedly connected to both ends of the arc plate 4, and the installation blocks 18 and the second locking disc 2 are detachably and fixedly connected by tightening bolts 19. Through the cooperative setting of the installation blocks 18 and the tightening bolts 19, the arc plate 4 is fixedly connected above the second locking disc 2, and the center of the arc plate 4 coincides with the center of the second locking disc 2. And a clamping groove 41 is provided above one end of the arc plate 4. And a sliding block 5 is slidably connected above the arc plate 4 along its arc. And an elastic buffer block 6 is fixedly connected between the sliding block 5 and the arc plate 4. The sliding block 5 stays stably at one end of the arc plate 4 away from the clamping groove 41 under the elastic support of the elastic buffer block 6. A blocking push plate 7 and a locking insertion rod 8 slide upward and protrude from the sliding block 5. And a first opening groove 52 for the internal up-and-down sliding setting of the blocking push plate 7 and a second opening groove 53 for the internal up-and-down sliding setting of the locking insertion rod 8 are provided on the upper end surface of the sliding block 5. And the first opening groove 52 is located between the clamping groove 41 and the second opening groove 53. When it is not necessary to lock and fix the first locking disc 1 and the second locking disc 2, the blocking push plate 7 and the locking insertion rod 8 are both retracted downward into the sliding block 5. The first locking disc 1 rotates relative to the second locking disc 2 driven by the outer ring of the bearing, so that the protruding plate 3 rotates past the sliding block 5. The sliding block 5 is located below the protruding plate 3 and cannot block the protruding plate 3. The outer ring of the bearing and the inner ring of the bearing rotate relative to each other without interference;

[0037] When the first locking plate 1 and the second locking plate 2 need to be locked and fixed, the blocking push plate 7 extends the slider 5 upward and blocks the travel path of the protruding plate 3. The protruding plate 3 moves to the blocking push plate 7 and pushes the blocking push plate 7 to slide. When the protruding plate 3 moves to abut against the blocking push plate 7, the locking plug rod 8 is aligned with the locking plug hole 31 and the locking plug rod 8 is temporarily not inserted into the locking plug hole 31 upward. Compared with the prior art that requires manual adjustment of the shaft sleeve and the locking pin to be aligned, the locking plug rod 8 and the locking plug hole 31 are kept aligned with each other through the setting of the protruding plate 3 in this embodiment, which is convenient for the locking plug rod 8 to extend into the locking plug hole 31 for locking and fixing, which significantly improves the working efficiency of the locking process. The blocking push plate 7 drives the slider 5 to slide together, so that the slider 5 slides in the direction of the arc plate 4 end close to the slot 41, and the slider 5 slides The elastic buffer block 6 is elastically deformed by the movement. Compared with the one-time locking and fixing in the prior art, the present embodiment absorbs the impact force of the protruding plate 3 through the elastic deformation of the elastic buffer block 6, thereby achieving the effect of gradually absorbing and reducing the rotation torque of the blade, reducing the torque load borne by the subsequent locking rod 8 when inserted into the locking socket 31, thereby increasing the service life of the locking rod 8 and the protruding plate 3, and appropriately reducing the material standards of the locking rod 8 and the protruding plate 3 without affecting normal use, thereby reducing the production cost. When the slider 5 slides to the slot 41, the slider 5 is fixed under the clamping cooperation of the clamping block 15 and the slot 41, and the locking rod 8 slides upward and is inserted into the locking socket 31, so that the protruding plate 3 and the slider 5 are kept locked and fixed, and then the first locking plate 1 and the second locking plate 2 are locked and fixed;

[0038] On the inner bottom walls of the first opening groove 52 and the second opening groove 53, a first electric push rod 9 and a second electric push rod 10 are respectively detachably and fixedly connected. Inside the slider 5, the output end of the first electric push rod 9 is fixedly connected to the lower end of the blocking push plate 7, and the output end of the second electric push rod 10 is fixedly connected to the lower end of the locking insertion rod 8. The blocking push plate 7 and the locking insertion rod 8 slide up and down respectively driven by the output ends of the first electric push rod 9 and the second electric push rod 10. The sliding directions of the output ends of the first electric push rod 9 and the second electric push rod 10 change with the change of the current direction. Thus, by changing the current direction, the first electric push rod 9 and the second electric push rod 10 respectively drive the blocking push plate 7 and the locking insertion rod 8 to slide up and down. The first electric push rod 9 and the second electric push rod 10 can select the Koken electric push rod of model KAC02. The second electric push rod 10 is connected in series with the touch switch 13 through the wire 11 and is connected in parallel with the first electric push rod 9 on the variable-direction DC power supply 12. The slider 5 is provided with a power supply installation groove 55 opening on its end face, and the variable-direction DC power supply 12 is detachably installed in the power supply installation groove 55. The setting of the power supply installation groove 55 is convenient for taking out the variable-direction DC power supply 12 with exhausted power and installing a new variable-direction DC power supply 12. A variable-direction controller 14 for changing the current direction of the variable-direction DC power supply 12 is provided on the variable-direction DC power supply 12, and a signal receiver signal-connected to the signal transmitter outside is provided in the variable-direction controller 14. The variable-direction controller 14 changes the current output direction of the variable-direction DC power supply 12 according to the signal transmitted from the outside. The variable-direction DC power supply 12 with the variable-direction controller 14 can select the bipolar power supply of model IT6433 to change the current output direction;

[0039] The variable-direction DC power supply 12 supplies power to the first electric push rod 9 and the second electric push rod 10. And the second electric push rod 10 has current flowing through and works only when the touch switch 13 is closed. When it is necessary to lock and fix the first locking disc 1 and the second locking disc 2, the variable-direction DC power supply 12 outputs a positive current, and the first electric push rod 9 pushes the blocking push plate 7 upward, so that the blocking push plate 7 contacts the protruding plate 3 and slides under the push of the protruding plate 3. And the touch switch 13 is in the off state under the extrusion of the clamping block 15 and makes the second electric push rod 10 unable to push the locking plug 8 upward. Until when the slider 5 slides to the card slot 41, the clamping block 15 extends downward into the card slot 41 to fix the slider 5 on the arc plate 4, and makes the touch switch 13 closed. The closure of the touch switch 13 makes the second electric push rod 10 push the locking plug 8 upward, and the locking plug 8 extends upward into the locking socket 31 to achieve locking and fixing. When it is necessary to release the locking and fixing of the first locking disc 1 and the second locking disc 2, by controlling the variable-direction controller 14, the variable-direction DC power supply 12 outputs a reverse current, and the first electric push rod 9 and the second electric push rod 10 respectively pull the blocking push plate 7 and the locking plug 8 downward, so that the blocking push plate 7 no longer blocks the protruding plate 3, the locking plug 8 leaves the locking socket 31, and the blocking push plate 7 slides downward so that the clamping block 15 leaves the card slot 41 upward, the slider 5 is disengaged from the fixation, and the clamping block 15 retracts into the extension slot 51 and squeezes the touch switch 13 again, making the touch switch 13 switch to the off state again;

[0040] An extension slot 51 for the clamping block 15 to slide up and down inside is opened at the lower end of the slider 5. And a clamping block elastic connecting rod 16 is fixedly connected between the clamping block 15 and the inner top wall of the extension slot 51. And a guiding insertion rod 24 is fixedly connected to the inner top wall of the extension slot 51 and slides downward through the clamping block elastic connecting rod 16 and extends into the clamping block 15. And the clamping block 15 is provided with a guiding insertion slot 151 for the guiding insertion rod 24 to slide and insert. The cooperation of the guiding insertion rod 24 and the guiding insertion slot 151 guides and limits the up and down sliding process of the clamping block 15, improves the stability of the up and down sliding process of the clamping block 15, and the guiding insertion rod 24 guides the elastic deformation process of the clamping block elastic connecting rod 16, improves the stability of the elastic deformation process of the clamping block elastic connecting rod 16. The touch switch 13 is fixedly connected to the inner top wall of the extension slot 51, and the touch switch 13 is located above the clamping block 15 and is in extrusion cooperation with the upper end of the clamping block 15. A pressure sensor is arranged inside the touch switch 13, and the touch switch 13 is in the off state when being extruded by an external force, and the touch switch 13 is in the closed state after the external force extrusion disappears;

[0041] When the slider 5 has not slid to align the protruding groove 51 with the clamping groove 41, the clamping block 15 retracts into the protruding groove 51 and presses the touch switch 13 to be in an off state. Moreover, the elastic connecting rod 16 of the clamping block is in a compressed state under the pressure of the clamping block 15 and has an elastic force to push the clamping block 15 downward. Until the slider 5 slides to align the protruding groove 51 with the clamping groove 41, the clamping block 15 extends downward into the clamping groove 41 under the elastic push of the elastic connecting rod 16 of the clamping block, so that the slider 5 is fixed on the arc plate 4. And the clamping block 15 slides downward and leaves the touch switch 13, and the touch switch 13 switches to a closed state, so that the second electric push rod 10 pushes the locking plug 8 into the locking jack 31. A pull rope 17 is fixedly connected between the upper end of the clamping block 15 and the lower end of the blocking push plate 7. And the rope body of the pull rope 17 close to the blocking push plate 7 extends downward above the clamping block 15 after extending out of the upper end of the first opening groove 52, so that the blocking push plate 7 slides downward and pulls the clamping block 15 to slide upward through the pull rope 17. When it is necessary to release the locking and fixing of the first locking disc 1 and the second locking disc 2, the first electric push rod 9 and the second electric push rod 10 respectively pull the blocking push plate 7 and the locking plug 8 downward, so that the blocking push plate 7 no longer blocks the protruding plate 3, the locking plug 8 leaves the locking jack 31, the blocking push plate 7 slides downward to reset and pulls the clamping block 15 to slide upward through the pull rope 17, so that the clamping block 15 leaves the clamping groove 41 upward and retracts into the protruding groove 51, the slider 5 is separated from the arc plate 4, and the slider 5 slides reversely and resets under the elastic pull of the elastic buffer block 6. And the clamping block 15 retracts into the protruding groove 51 and presses the touch switch 13 again, so that the touch switch 13 switches to an off state again.

[0042] Example Two:

[0043] On the basis of Example One, Example Two optimizes the sliding connection stability between the arc plate 4 and the slider 5, that is: on the inner and outer sides at both ends of the arc plate 4, wing connecting plates 20 are respectively fixedly connected, and arc-shaped connecting rods 21 are fixedly connected between the wing connecting plates 20 located on the same inner or outer side of the arc plate 4. The slider 5 is fixedly connected with two guiding connecting plates 22, and the two arc-shaped connecting rods 21 respectively pass through the two guiding connecting plates 22 in one-to-one correspondence. And the guiding connecting plates 22 are provided with guiding through grooves 221 for the arc-shaped connecting rods 21 to slide through. Through the cooperative setting of the guiding connecting plates 22 and the arc-shaped connecting rods 21, the sliding path of the slider 5 is guided, and the sliding stability of the slider 5 on the arc plate 4 is improved. The elastic buffer block 6 is fixedly connected between the guiding connecting plate 22 and the wing connecting plate 20 close to the clamping groove 41, and the elastic buffer block 6 is slidably sleeved on the outer side of the arc-shaped connecting rod 21. The arc-shaped connecting rod 21 provides axial support for the elastic buffer block 6, avoids the elastic buffer block 6 from being distorted during the elastic deformation process, improves the stability of the elastic deformation process of the elastic buffer block 6 and prolongs the service life of the elastic buffer block 6.

[0044] Example Three:

[0045] Embodiment 3 optimizes the sliding process of the blocking push plate 7 pulling the clamping block 15 on the basis of Embodiment 1, that is: the slider 5 is provided with an empty slot 54 for the internal up-and-down sliding of the rope connecting plate 23, and a rope 17 is fixedly connected between the upper end of the rope connecting plate 23 and the lower end of the blocking push plate 7, and not less than two ropes 17 are fixedly connected between the lower end of the rope connecting plate 23 and the upper end of the clamping block 15. By setting multiple ropes 17 to pull the clamping block 15 upward, the stability of the process of the rope 17 pulling the clamping block 15 upward is improved.

[0046] Working principle: When it is necessary to lock and fix the first locking disc 1 and the second locking disc 2, the variable-direction DC power supply 12 outputs a positive current, and the first electric push rod 9 pushes the blocking push plate 7 upward, so that the blocking push plate 7 contacts the protruding plate 3 and slides under the push of the protruding plate 3. The blocking push plate 7 drives the slider 5 to slide together, so that the slider 5 slides toward one end of the arc plate 4 near the card slot 41, and the elastic buffer block 6 deforms elastically when the slider 5 slides;

[0047] Until the slider 5 slides to align the protruding slot 51 with the card slot 41, the clamping block 15 is elastically pushed downward by the elastic link of the clamping block and extends into the card slot 41, so that the slider 5 is fixed on the arc plate 4, and the clamping block 15 slides downward and leaves the touch switch 13, and the touch switch 13 switches to the closed state, so that the second electric push rod 10 pushes the locking plug 8 into the locking socket 31;

[0048] When it is necessary to release the locking and fixing of the first locking disc 1 and the second locking disc 2, by controlling the variable-direction controller 14, the variable-direction DC power supply 12 outputs a reverse current, and the first electric push rod 9 and the second electric push rod 10 respectively pull the blocking push plate 7 and the locking plug 8 downward, so that the blocking push plate 7 no longer blocks the protruding plate 3, the locking plug 8 leaves the locking socket 31, the blocking push plate 7 slides downward and resets, and pulls the clamping block 15 upward through the rope 17, so that the clamping block 15 leaves the card slot 41 upward and retracts into the protruding slot 51. The slider 5 is disengaged from the arc plate 4, and the slider 5 slides reversely and resets under the elastic pull of the elastic buffer block 6, and the clamping block 15 retracts into the protruding slot 51 and presses the touch switch 13 again, so that the touch switch 13 switches to the off state again.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blade locking device for a wind power generator set, comprising a first locking disc (1) and a second locking disc (2) fixedly connected to the outer ring and the inner ring of a bearing respectively, and a protruding plate (3) extending above the second locking disc (2) is fixedly connected to the first locking disc (1), and a locking insertion hole (31) is formed in the protruding plate (3), characterized in that: An arc plate (4) with a clamping groove (41) opened above one end is fixedly connected to the second locking disc (2), and a slider (5) is slidably connected above the arc plate (4) along its arc direction; A blocking push plate (7) and a locking plug (8) that is fitted and inserted into the locking socket (31) slide upwardly and extend out of the slider (5). The convex plate (3) pushes the blocking push plate (7) to slide towards the direction close to the clamping groove (41). A first electric push rod (9) and a second electric push rod (10) for respectively driving the blocking push plate (7) and the locking plug (8) to slide up and down are arranged in the slider (5). The second electric push rod (10) is connected in series with a touch switch (13) through a wire (11) and is connected in parallel with the first electric push rod (9) to a variable-direction DC power supply (12); An extension groove (51) with a block (15) slidably arranged up and down inside is opened at the lower end of the slider (5). A block elastic connecting rod (16) is fixedly connected between the block (15) and the inner wall of the extension groove (51). The touch switch (13) is fixedly connected to the inner top wall of the extension groove (51) and is disconnected under the pressure of the block (15). The block (15) extends downward into the clamping groove (41) to make the touch switch (13) closed. A pull rope (17) is fixedly connected between the block (15) and the blocking push plate (7). The blocking push plate (7) slides downward and pulls the block (15) to slide upward through the pull rope (17); Each end of the arc plate (4) is fixedly connected with a side wing connecting plate (20), and an arc connecting rod (21) is fixedly connected between the side wing connecting plates (20) at both ends. The slider (5) is fixedly connected with a guiding connecting plate (22), and the guiding connecting plate (22) is provided with a guiding through groove (221) for the arc connecting rod (21) to slide through; An elastic buffer block (6) is fixedly connected between the guiding connecting plate (22) and a side wing connecting plate (20), and the elastic buffer block (6) is slidably sleeved outside the arc connecting rod (21).

2. The blade locking device for a wind power generator set according to claim 1, characterized in that: A variable-direction controller (14) for changing the current direction of the variable-direction DC power supply (12) is arranged on the variable-direction DC power supply (12), and the variable-direction controller (14) is signal-connected to an external signal transmitter.

3. The blade locking device for a wind power generator set according to claim 1, characterized in that: Each end of the arc plate (4) is fixedly connected with a mounting block (18), and the mounting block (18) and the second locking disc (2) are detachably and fixedly connected through a tightening bolt (19).

4. The blade locking device for a wind power station wind turbine unit according to claim 1, characterized in that: Inner sides and outer sides at both ends of the arc plate (4) are fixedly connected with side wing connecting plates (20), and arc connecting rods (21) are fixedly connected between two side wing connecting plates (20) located on the same inner side or outer side of the arc plate (4). The slider (5) is fixedly connected with two guiding connecting plates (22) for the arc connecting rods (21) to respectively pass through correspondingly; 5. The blade locking device for a wind power generator set according to claim 1, characterized in that: A first opening groove (52) with a blocking push plate (7) slidably arranged up and down inside and a second opening groove (53) with a locking plug (8) slidably arranged up and down inside are opened on the upper end surface of the slider (5). The first electric push rod (9) and the second electric push rod (10) are respectively detachably and fixedly installed on the inner bottom walls of the first opening groove (52) and the second opening groove (53); When the first locking disc (1) and the second locking disc (2) need to be locked and fixed, the blocking push plate (7) extends upward out of the slider (5) and blocks the traveling path of the protruding plate (3). When the protruding plate (3) moves to the blocking push plate (7) and pushes the blocking push plate (7) to slide, and when the protruding plate (3) moves to abut against the blocking push plate (7), the locking plug (8) and the locking socket (31) are vertically aligned and the locking plug (8) does not insert upward into the locking socket (31) temporarily. The blocking push plate (7) drives the slider (5) to slide together, so that the slider (5) slides in the direction close to one end of the arc plate (4) where the clamping groove (41) is opened. The sliding of the slider (5) causes the elastic buffer block (6) to undergo elastic deformation. When the slider (5) slides to the clamping groove (41), the slider (5) is fixed under the clamping cooperation of the clamping block (15) and the clamping groove (41), and the locking plug (8) slides upward and inserts into the locking socket (31), so that the protruding plate (3) and the slider (5) are kept locked and fixed, and further the first locking disc (1) and the second locking disc (2) are locked and fixed.

6. The blade locking device for a wind power station fan unit according to claim 1, characterized in that: The slider (5) is provided with an empty groove (54) in which a pull rope connecting plate (23) is slidably arranged up and down inside. A pull rope (17) is fixedly connected between the upper end of the pull rope connecting plate (23) and the blocking push plate (7), and no less than two pull ropes (17) are fixedly connected between the lower end of the pull rope connecting plate (23) and the clamping block (15).

7. The blade locking device for a wind power generator set according to claim 1, characterized in that: The clamping block elastic connecting rod (16) is fixedly connected between the inner top wall of the protruding groove (51) and the clamping block (15). A guiding insertion rod (24) is fixedly connected to the inner top wall of the protruding groove (51) and slides downward through the clamping block elastic connecting rod (16) and extends into the clamping block (15). The clamping block (15) is provided with a guiding insertion slot (151) for the guiding insertion rod (24) to slide and insert.

8. The blade locking device for a wind power station wind turbine unit according to claim 1, characterized in that: The slider (5) is provided with a power supply installation groove (55) with an opening on its end face, and the variable-direction DC power supply (12) is detachably installed in the power supply installation groove (55).

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