Automatic locking mechanism for wind power generation electric impeller

Abstract

The invention discloses a wind power generation electric impeller automatic locking mechanism which comprises a rotating shaft and a locking piece, one end of the rotating shaft is fixedly connected with the locking piece, the locking piece is fixedly provided with a locking hole, the locking piece is fixedly sleeved with a friction speed reduction ring, one side of the locking piece is provided with a locking cylinder, and the axis of the locking cylinder coincides with the axis of the locking hole. Auxiliary speed reduction is achieved through contact of a friction block and a friction speed reduction ring, then mechanical locking is achieved through the fact that the friction block stretches into a locking hole, the locking process is high in automation degree, accurate and reliable, accidental rotation of an impeller is effectively avoided, and the operation safety of equipment is improved; nodding type vibration generated in the operation process of the impeller can be effectively buffered, impact of vibration on parts of the locking mechanism is reduced, abrasion is reduced, the service life is prolonged, position adjustment and fixation are achieved in cooperation with an adjusting screw, dismounting and mounting are convenient, later maintenance and part replacement are facilitated, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation equipment, in particular to a wind power generation electric impeller automatic locking mechanism. BACKGROUND

[0002] As a clean and renewable energy, wind power generation is increasingly occupying a larger proportion in the global energy structure. The impeller of the wind turbine is a core working component, which needs to rotate at high speed during operation. However, during equipment maintenance, repair or shutdown, the impeller needs to be reliably locked to prevent safety accidents caused by accidental rotation of the impeller.

[0003] The existing wind power generation impeller locking mechanism mostly adopts mechanical bolt type or hydraulic locking mode. The mechanical bolt type locking mechanism needs manual operation, has low locking efficiency and poor locking accuracy. The bolt is prone to wear after long-term use, resulting in decreased locking reliability. The hydraulic locking mode has a complex structure and high maintenance cost. Moreover, the hydraulic system is prone to leakage, which affects the locking effect. In addition, the impeller generates a large vibration during rotation, especially the "nodding" vibration. The existing locking mechanism lacks an effective buffer and damping structure. Long-term vibration will cause the locking mechanism components to loosen and wear, shortening the service life. At the same time, the mounting frame of the existing locking mechanism is mostly a fixed structure, which is inconvenient to disassemble and assemble, and is not conducive to the maintenance and replacement of components in the later period.

[0004] Therefore, it is of great practical significance to develop a wind power generation electric impeller automatic locking mechanism with accurate and reliable locking, good buffer and damping effect, and convenient disassembly and assembly. SUMMARY

[0005] In order to solve the above problems, the present application provides a wind power generation electric impeller automatic locking mechanism.

[0006] The present application is achieved by the following technical solutions: A wind power generation electric impeller automatic locking mechanism, comprising a rotating shaft and a locking piece, the rotating shaft is fixedly connected with the locking piece at one end, the locking piece is fixedly provided with a locking hole, the locking piece is fixedly sleeved with a friction deceleration ring outside, the locking piece is provided with a locking cylinder at one side, the locking cylinder is coaxial with the locking hole, the locking cylinder is fixedly connected with a connecting frame at one side, the connecting frame is fixedly installed with a speed reducer motor, the output end of the speed reducer motor is connected with a lead screw, the lead screw is connected with a cylindrical lead screw assembly, the lead screw assembly is inserted into the locking cylinder and is slidingly fitted, a limiting block is fixedly installed on the inner wall of the locking cylinder, a limiting groove is provided on the lead screw assembly, the limiting block is inserted into the limiting groove and is slidingly fitted, a threaded hole is provided on one side of the lead screw assembly, a threaded connecting rod is threadedly connected in the threaded hole, one end of the threaded connecting rod is fixedly connected with a spring cylinder, a T-shaped limiting slide rod is slidingly connected in the spring cylinder, one end of the T-shaped limiting slide rod is fixedly connected with a friction block.

[0007] Preferably, a plurality of insertion holes are arranged on one side of the spring barrel, and an insertion rod is inserted into each insertion hole, one end of the plurality of insertion rods is fixedly connected with the side wall of the friction block, the spring barrel is internally provided with a spring, and the cross section of the T-shaped limiting sliding rod is square.

[0008] Preferably, a U-shaped frame is fixedly installed on one side of the locking member, and a touch member is embedded and fixed on the U-shaped frame and located on one side of the locking hole.

[0009] Preferably, the rotating shaft is sleeved with two arc-shaped positioning covers, the two arc-shaped positioning covers form a circular ring, arc-shaped plates are fixedly connected to the side walls of the arc-shaped positioning covers through bolts, the outer arc walls of the arc-shaped plates are fixedly connected with limiting frames, the limiting frames are provided with sliding grooves at the top, sliding blocks are slidably connected in the sliding grooves, adjusting screws are rotatably connected to one side of the sliding blocks, the adjusting screws penetrate through the sliding grooves and are threadedly connected with the sliding grooves, the top ends of the two sliding blocks are fixedly connected with a mounting frame, the locking cylinder is inserted into the center of the top of the mounting frame, the mounting frame is sleeved on the two arc-shaped positioning covers, one end of the locking cylinder is fixedly connected with a limiting ring, and the limiting ring is fixedly connected with the mounting frame through bolts.

[0010] Preferably, the rotating shaft is provided below with a support frame, two fixed blocks are fixedly connected to the support frame through bolts, two guide rods are fixedly connected to the top end of each fixed block, each guide rod penetrates through a corresponding limiting frame and is slidably connected with the limiting frame, a first elastic shock-absorbing block is fixedly installed at the bottom end of the limiting frame, a second elastic shock-absorbing block is sleeved on the corresponding two guide rods, the bottom end of the second elastic shock-absorbing block is attached to the limiting frame, and the guide rods are rotatably connected with locking nuts.

[0011] Preferably, the spring is a compression spring, and the two ends of the spring are attached to the T-shaped limiting sliding rod and the inner wall of the spring barrel, respectively.

[0012] Preferably, the first elastic shock-absorbing block and the second elastic shock-absorbing block are made of polyurethane shock-absorbing material, and the first elastic shock-absorbing block is attached to the top end of the fixed block.

[0013] Preferably, the touch member is a pressure sensor, is electrically connected with an external controller, and the external controller is electrically connected with the speed reducer motor.

[0014] Compared with the prior art, the application has the advantages that: the auxiliary speed reduction is realized by the contact between the friction block and the friction speed reduction ring, the mechanical locking is realized by the extension of the friction block into the locking hole, the locking process is highly automatic and accurate and reliable, the unexpected rotation of the impeller is effectively avoided, the operation safety of the equipment is improved, the first elastic shock-absorbing block and the second elastic shock-absorbing block are arranged, the nodding vibration generated during the operation of the impeller can be effectively buffered, the impact of the vibration on the parts of the locking mechanism is reduced, the wear is reduced, the service life is prolonged, the position adjustment and fixation are realized by cooperating with the adjusting screw, the equipment is convenient to disassemble and assemble, the equipment is convenient for later maintenance and part replacement, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1is the first perspective view of the structure of the present application; Figure 2 is the structure of the present application Figure 1 is an enlarged schematic view of A in the middle; Figure 3 is the second perspective view of the structure of the present application; Figure 4 is the third perspective view of the structure of the present application; Figure 5 is the fourth perspective view of the structure of the present application.

[0016] In the figure: rotating shaft 1, locking piece 2, friction deceleration ring 3, locking hole 4, U-shaped bracket 5, touching piece 6, arc-shaped positioning cover 7, mounting bracket 8, locking cylinder 9, limiting ring 10, connecting bracket 11, deceleration motor 12, lead screw 13, lead screw assembly 14, limiting block 15, limiting groove 16, threaded hole 17, threaded connecting rod 18, spring cylinder 19, insertion hole 20, insertion rod 21, spring 22, T-shaped limiting sliding rod 23, friction block 24, support bracket 25, fixed block 26, guide rod 27, first elastic shock absorbing block 28, limiting bracket 29, second elastic shock absorbing block 30, locking nut 31, arc-shaped piece 32, sliding groove 33, sliding block 34, adjusting screw 35. DETAILED DESCRIPTION

[0017] The application will be described in further detail below with reference to the drawings and specific embodiments: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, a wind power generation electric impeller automatic locking mechanism, including rotating shaft 1 and locking piece 2, rotating shaft 1 one end fixedly connected locking piece 2, locking piece 2 is fixedly provided with locking hole 4, locking piece 2 outer fixedly sleeved friction deceleration ring 3, locking piece 2 one side is provided with locking cylinder 9, locking cylinder 9 and locking hole 4 axis coincides, locking cylinder 9 one side fixedly connected with connecting bracket 11, connecting bracket 11 is fixedly installed with deceleration motor 12, deceleration motor 12 output end is connected with lead screw 13, lead screw 13 screw is connected with cylindrical lead screw assembly 14, lead screw assembly 14 is inserted into locking cylinder 9 and is slidably fitted, locking cylinder 9 inner wall is fixedly installed with limiting block 15, lead screw assembly 14 is provided with limiting groove 16, limiting block 15 is inserted into limiting groove 16 and is slidably fitted, lead screw assembly 14 one side is provided with threaded hole 17, threaded hole 17 is screwedly connected with threaded connecting rod 18, threaded connecting rod 18 one end is fixedly connected with spring cylinder 19, spring cylinder 19 is slidably connected with T-shaped limiting sliding rod 23, T-shaped limiting sliding rod 23 one end is fixedly connected with friction block 24.

[0018] The spring cylinder 19 has multiple insertion holes 20 on one side, and each insertion hole 20 has a rod 21 inserted into it. One end of each rod 21 is fixedly connected to the side wall of the friction block 24. The spring cylinder 19 has a spring 22 inside, and the T-shaped limiting slide rod 23 has a square cross-section.

[0019] A U-shaped bracket 5 is fixedly installed on one side of the locking component 2. A contact component 6 is fixedly embedded on the U-shaped bracket 5, and the contact component 6 is located on one side of the locking hole 4.

[0020] The rotating shaft 1 is fitted with two arc-shaped positioning covers 7, which form a ring. Arc-shaped pieces 32 are fixed to the side walls of the arc-shaped positioning covers 7 by bolts. A limit frame 29 is fixed to the outer arc wall of the arc-shaped pieces 32. The top of the limit frame 29 is provided with a sliding groove 33. A slider 34 is slidably connected in the sliding groove 33. An adjusting screw 35 is screwed to one side of the slider 34. The adjusting screw 35 passes through the sliding groove 33 and is threaded to it. The top of the two sliders 34 is fixedly connected to the mounting frame 8. A locking cylinder 9 is inserted into the center of the top of the mounting frame 8. The mounting frame 8 is fitted on the two arc-shaped positioning covers 7. A limit ring 10 is fixedly connected to one end of the locking cylinder 9. The limit ring 10 is fixed to the mounting frame 8 by bolts.

[0021] A support frame 25 is provided below the rotating shaft 1. Two fixing blocks 26 are fixed on the support frame 25 by bolts. Two guide rods 27 are fixedly connected to the top of each fixing block 26. Each guide rod 27 passes through the corresponding limiting frame 29 and is slidably connected to it. A first elastic damping block 28 is fixedly installed at the bottom of the limiting frame 29. A second elastic damping block 30 is sleeved on the two corresponding guide rods 27. The bottom of the second elastic damping block 30 is in contact with the limiting frame 29. A locking nut 31 is screwed onto the guide rod 27.

[0022] Spring 22 is a compression spring, with its two ends respectively attached to the T-shaped limiting slide bar 23 and the inner wall of the spring cylinder 19.

[0023] Both the first elastic damping block 28 and the second elastic damping block 30 are made of polyurethane damping material, and the first elastic damping block 28 is attached to the top of the fixed block 26.

[0024] The contact element 6 is a pressure sensor, which is electrically connected to an external controller. The external controller is electrically connected to the geared motor 12.

[0025] Working principle: During the locking operation, the rotating shaft 1 is braked and decelerated by the braking device. When the rotation speed of the rotating shaft 1 drops to the preset value, the reduction motor 12 starts and drives the lead screw 13 to rotate. Since the limit block 15 is inserted into the limit groove 16, the rotation of the lead screw assembly 14 is restricted, causing the lead screw assembly 14 to slide along the axial direction of the locking cylinder 9. The lead screw assembly 14 drives the threaded connecting rod 18, spring cylinder 19, insert rod 21, T-shaped limit slide rod 23 and friction block 24 to move synchronously. The friction block 24 first extends out of the locking cylinder 9 and contacts the friction reduction ring 3, and further decelerates the locking part 2 and the rotating shaft 1 through friction.

[0026] During the contact between the friction block 24 and the friction deceleration ring 3, the spring 22 is compressed by the T-shaped limiting slide bar 23, which plays a buffering role and avoids damage caused by rigid collision between the friction block 24 and the friction deceleration ring 3. As the lead screw assembly 14 continues to move, when the friction block 24 moves to be aligned with the locking hole 4, under the action of the elastic restoring force of the spring 22, the friction block 24 quickly extends into the locking hole 4 to achieve mechanical locking of the rotating shaft 1.

[0027] When the friction block 24 extends into the locking hole 4, it contacts the contact element 6 on the U-shaped frame 5. On the one hand, the contact element 6 limits the friction block 24 to prevent it from extending too far. On the other hand, the contact element 6 uses a pressure sensor to detect the contact pressure and sends an electrical signal to the external controller to indicate to the operator that the locking work has been completed. At the same time, the external controller controls the reduction motor 12 to stop running to ensure that the locking state is stable.

[0028] During impeller operation, the blades connected to the front section of shaft 1 will generate "nodding" vibration. At this time, the first elastic damping block 28 and the second elastic damping block 30 will undergo elastic deformation to absorb vibration energy, play a buffering and damping role, maintain the stability of the entire locking mechanism, and reduce vibration damage to components.

[0029] When it is necessary to disassemble the mounting bracket 8 for maintenance or replacement of parts, loosen the adjusting screw 35 so that the slider 34 can slide along the slide groove 33, thereby driving the mounting bracket 8 and locking cylinder 9 and other components to move. At this time, one end of the friction block 24 will have enough space. By rotating the friction block 24, the spring cylinder 19, together with the threaded connecting rod 18, can be rotated out of the threaded hole 17, realizing quick disassembly and assembly and improving maintenance efficiency.

[0030] Furthermore, when disassembling and installing the entire device, the entire assembly can be disassembled simply by rotating the bolts on the arc-shaped plate 32, making the operation simple and convenient.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic locking mechanism for a wind turbine electric rotor, comprising a rotating shaft (1) and a locking element (2), characterized in that: One end of the rotating shaft (1) is fixedly connected to a locking member (2), and a locking hole (4) is fixedly provided on the locking member (2). A friction reduction ring (3) is fixedly sleeved on the outside of the locking member (2). A locking cylinder (9) is provided on one side of the locking member (2). The locking cylinder (9) and the locking hole (4) are axially aligned. A connecting frame (11) is fixedly connected to one side of the locking cylinder (9). A reduction motor (12) is fixedly installed on the connecting frame (11). The output end of the reduction motor (12) is connected to a lead screw (13). The lead screw (13) is connected to a cylindrical lead screw. The screw assembly (14) is inserted into the locking cylinder (9) and slidably engaged. A limit block (15) is fixedly installed on the inner wall of the locking cylinder (9). A limit groove (16) is provided on the screw assembly (14). The limit block (15) is inserted into the limit groove (16) and slidably engaged. A threaded hole (17) is provided on one side of the screw assembly (14). A threaded connecting rod (18) is threadedly connected in the threaded hole (17). A spring cylinder (19) is fixedly connected to one end of the threaded connecting rod (18). A T-shaped limit slide rod (23) is slidably connected in the spring cylinder (19). A friction block (24) is fixedly connected to one end of the T-shaped limit slide rod (23).

2. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: The spring cylinder (19) has multiple insertion holes (20) on one side, and each insertion hole (20) has a rod (21) inserted into it. One end of each rod (21) is fixedly connected to the side wall of the friction block (24). The spring cylinder (19) has a spring (22) inside, and the T-shaped limiting slide rod (23) has a square cross-section.

3. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: A U-shaped frame (5) is fixedly installed on one side of the locking member (2), and a contact member (6) is fixedly embedded on the U-shaped frame (5). The contact member (6) is located on one side of the locking hole (4).

4. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: The rotating shaft (1) is fitted with two arc-shaped positioning covers (7), which form a ring. The side wall of the arc-shaped positioning cover (7) is fixed with an arc-shaped piece (32) by bolts. The outer arc wall of the arc-shaped piece (32) is fixed with a limit frame (29). The top of the limit frame (29) is provided with a sliding groove (33). A slider (34) is slidably connected in the sliding groove (33). An adjusting screw (35) is screwed to one side of the slider (34). The adjusting screw (35) passes through the sliding groove (33) and is threaded to it. The top of the two sliders (34) is fixedly connected to the mounting frame (8). The locking cylinder (9) is inserted into the center of the top of the mounting frame (8). The mounting frame (8) is fitted on the two arc-shaped positioning covers (7). One end of the locking cylinder (9) is fixedly connected to a limit ring (10). The limit ring (10) is fixed to the mounting frame (8) by bolts.

5. The automatic locking mechanism for a wind turbine electric rotor according to claim 4, characterized in that: A support frame (25) is provided below the rotating shaft (1). Two fixing blocks (26) are fixed on the support frame (25) by bolts. Two guide rods (27) are fixedly connected to the top of each fixing block (26). Each guide rod (27) passes through the corresponding limiting frame (29) and is slidably connected to it. A first elastic damping block (28) is fixedly installed at the bottom of the limiting frame (29). A second elastic damping block (30) is sleeved on the two corresponding guide rods (27). The bottom of the second elastic damping block (30) is in contact with the limiting frame (29). A locking nut (31) is screwed onto the guide rod (27).

6. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: The spring (22) is a compression spring, with its two ends respectively attached to the inner wall of the T-shaped limiting slide bar (23) and the spring cylinder (19).

7. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: Both the first elastic damping block (28) and the second elastic damping block (30) are made of polyurethane damping material, and the first elastic damping block (28) is attached to the top of the fixed block (26).

8. The automatic locking mechanism for a wind turbine electric rotor according to claim 1, characterized in that: The contact element (6) is a pressure sensor, which is electrically connected to an external controller, and the external controller is electrically connected to a geared motor (12).

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