CN110425235B - Wind turbine brake device - Google Patents

Abstract

The present invention discloses a wind turbine brake device, comprising a first rotating shaft, a brake box, a hydraulic telescopic rod, a buffer disk, a fixing ring, an annular brake pad and a brake disc; the driven end of the first rotating shaft is connected to the power input end of the generator, the active end of the first rotating shaft is connected to the power output end of the fan blade; the brake disc, the annular brake pad, the buffer disk, the fixing ring and the hydraulic telescopic rod are arranged in sequence from the active end to the driven end of the first rotating shaft; the fixed end of the hydraulic telescopic rod is connected to the inner wall of the brake box, and the hydraulic telescopic rod is connected to the side of the annular brake pad and the buffer disk close to the brake disc; a brake groove is provided on the brake disc, the annular brake pad can be inserted into the brake groove, and multiple brakes can be applied step by step, thereby ensuring normal braking while extending the service life of the annular brake pad, and the reaction force generated during braking will be dispersed by the buffer disk, thereby ensuring the stability of the connection between the fixing ring and the buffer ring.

Description

Wind turbine brake device

Technical Field

The invention relates to the field of wind power generation, and in particular to a wind power generator braking device.

Background technique

As people develop and utilize pollution-free renewable energy, wind power generation has attracted more and more attention. In recent years, while the wind power industry has been rapidly developing, people have higher and higher requirements for the control technology and safety of wind turbines.

Wind power generation equipment is in a natural environment, and the wind speed varies greatly. If the wind speed is too high, the power generation efficiency of the generator will be relatively low. When the wind speed is too high, if the wind generator is not decelerated and braked in time, the wind generator will exceed the maximum operating speed, causing damage. In order to ensure its braking performance, most existing brakes have complex structures and are not easy to replace. In addition, the reverse force generated during braking can easily cause the brake pad fixing device to generate torque, thereby affecting its working efficiency.

Summary of the invention

In order to solve the above-mentioned problems, the present invention provides a wind turbine brake device, which solves the problem of being able to brake step by step by setting a plurality of annular brake pads and their corresponding brake grooves, thereby ensuring that the device can perform normal braking while indirectly improving the service life of the annular brake pads. The friction force is dispersed by the plurality of annular brake pads, thereby achieving the effect of improving the service life of the device.

The present invention is realized by the following technical scheme: a wind turbine brake device, comprising a first rotating shaft, a brake box, a hydraulic telescopic rod, a buffer plate, a fixing ring, an annular brake pad and a brake disc; the driven end of the first rotating shaft is connected to the power input end of the generator, and the active end of the first rotating shaft is connected to the power output end of the fan blade;

The first rotating shaft is arranged in the brake box along the horizontal direction, and the brake disc, annular brake pad, buffer disc, fixed ring and hydraulic telescopic rod are arranged in sequence from the active end to the driven end of the first rotating shaft; the fixed end of the hydraulic telescopic rod is connected to the inner wall of the brake box, and its free end is connected to the fixed ring, and the fixed ring is connected to the buffer disc; the annular brake pad is connected to the side of the buffer disc close to the brake disc; a brake groove is arranged on the brake disc, and the annular brake pad can be stuck in the brake groove.

The annular brake pad includes a plurality of coaxial brake pads, the diameter of the coaxial brake pads increases and the width decreases from the axis to the outside; a brake groove is provided on the end surface of the wheel disc opposite to the annular brake pad, the number of the brake grooves is consistent with the number of the brake pads, and the width, depth and diameter of the brake grooves are matched one by one with the thickness, width and diameter of the plurality of brake pads, and the brake pads can be inserted into their corresponding brake grooves;

An annular slide groove is arranged along the circumferential direction at one end of the buffer disk, a rod insertion groove is arranged in the annular slide groove, an annular brake pad is arranged on the fixed disk, a rod insertion rod is arranged between the fixed disk and the buffer disk, one end of the rod insertion rod is connected to the fixed disk, the other end of the rod insertion rod is deeply inserted into the rod insertion groove, and an elastic body is arranged between the side wall of the rod insertion groove and the rod insertion rod;

The hydraulic telescopic rod is connected to the output end of the hydraulic system through a pipeline.

The width difference between two adjacent annular brake pads is equal to the depth difference between two adjacent brake grooves.

At least two arc-shaped sliders are arranged in the rod slot, one end of the arc-shaped slider is connected to the slider, and the other end is against the end of the rod extending into the rod slot; a cavity is arranged at a position corresponding to the arc-shaped slider, an elastomer and a slider are arranged in the cavity, the two ends of the slider are respectively connected to the elastomer and the arc-shaped slider, the end of the arc-shaped slider extending into the cavity is connected to the slider, and a limit block for limiting the slider is arranged at the opening of the cavity, and the limit block limits the slider and the elastomer inside the cavity; two adjacent buffer disks are connected by an insertion rod, one end of the insertion rod extends into the insertion rod slot, and the other end is fixedly connected to the other end face of the buffer disk.

The buffer disk includes a first buffer disk, a second buffer disk and a third buffer disk, wherein one end of the first buffer disk is connected to the fixing ring, and the other end is connected to the second buffer disk through an insert rod, and the two ends of the second buffer disk are respectively connected to the first buffer disk and the third buffer disk by an insert rod; one end of the third buffer disk is connected to the annular brake pad fixing disk, an annular brake pad is fixedly provided on one side of the annular brake pad fixing disk, and an insert rod is fixedly provided on the other side, and the insert rod extends into the insert rod groove of the third buffer disk and is connected to the third buffer disk.

The portion of the insertion rod extending into the insertion rod slot is provided with an arc-shaped protrusion to prevent the portion from escaping from the insertion rod slot.

The brake disc is connected to the first rotating shaft. The connecting surface of the brake disc and the first rotating shaft is provided with a keyway and a key for preventing relative rotation. The keyway and the key cooperate with each other. A limiting bolt is provided on one side of the brake disc.

A maintenance port is opened on the top of the brake box, the length of the maintenance port is greater than the diameter of the brake disc, and the width of the maintenance port is greater than the thickness of the brake disc. A lifting device for lifting the brake disc is arranged on the top of the brake box, and the lifting device includes a positioning rod, a threaded rod, a fixing rod, a clamping ring and a lifting plate. The positioning rod and the threaded rod are arranged on both sides of the maintenance port, and a threaded sleeve is slidingly sleeved on the threaded rod. The positioning rod is provided with a positioning sleeve, and the two ends of the lifting plate are respectively connected to the positioning sleeve and the threaded sleeve. The middle part of the lifting plate is connected to the upper end of the fixing rod, and the lower end of the fixing rod passes through the maintenance port clamping ring. The clamping ring is arranged on the outside of the brake disc, and there is a gap between the brake disc and the clamping ring. The maintenance port is opened directly above the brake disc.

A three-phase asynchronous motor is arranged on the top of the brake box, and the active end of the threaded rod is connected to the output end of the three-phase asynchronous motor.

The driving end of the first rotating shaft is connected to the driven end of the second rotating shaft through a coupling, and the driving end of the second rotating shaft is connected to the fan blade.

A motor fixing base is arranged below the brake box and the generator, the motor fixing base is fixedly connected to the machine body, and a support block is arranged between the bottom surface of the brake box and the motor fixing base.

Compared with the existing technology, the beneficial effects of the present invention are: by setting annular brake pads of different widths and diameters, the annular brake pads enter the brake grooves on the brake disc in sequence, and can brake step by step, thereby ensuring that the device can perform normal braking while indirectly extending the service life of the annular brake pads. The friction force is dispersed by the annular brake pads, thereby achieving the effect of increasing the service life of the device, and when friction is generated between the annular brake pads and the brake grooves, the generated reaction force will be buffered and weakened by the elastic force of the elastomer in the cavity, thereby ensuring the stability of the connection between the fixing ring and the buffer disc, so that it can better complete the fixing work.

Furthermore, the width difference between two adjacent annular brake pads is equal to the depth difference between two adjacent brake grooves, which can ensure that each annular brake pad and brake groove correspond to each other and generate corresponding friction resistance.

Furthermore, a buffer structure is provided on the annular brake pad, which can effectively buffer the reverse torque of the annular brake pad on the fixing device, thereby improving the safety of the brake mechanism.

Furthermore, a maintenance port is opened on the top of the brake box, and the brake disc can be pulled out of the brake box through the maintenance port for maintenance by means of a fixing rod and a clamping ring. This is simple and convenient, saves time and effort, and solves the problem of inconvenient traditional maintenance, thereby making the device more practical.

Furthermore, a lifting device is arranged on the top of the brake box, and the lifting device uses a threaded pair transmission to lift the brake disc, and its power is an electric motor, which can reduce the number of maintenance personnel and make it more convenient to repair and replace the brake disc.

Furthermore, the portion of the insertion rod extending into the insertion rod slot is provided with an arc-shaped protrusion to prevent it from escaping from the insertion rod slot, which can effectively prevent the insertion rod from escaping from the insertion rod slot under vibration conditions.

Furthermore, the hydraulic station drives the annular brake pad to move toward the brake disc, and the driving force is stable and reliable.

Furthermore, the active end of the first rotating shaft is connected to the driven end of the second rotating shaft through a coupling, and the active end of the second rotating shaft is connected to the fan blades. The provision of two coaxial rotating shafts is conducive to the installation, maintenance and replacement of the driven end equipment.

Furthermore, the motor fixing base below the brake box and the generator is fixedly connected to the machine body, and a support block is arranged between the bottom surface of the brake box and the motor fixing base, which can reduce vibration.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of the structure of the present invention;

FIG2 is an enlarged schematic diagram of a local portion I in FIG1;

FIG3 is a side view of the brake disc of the structure of the present invention;

FIG4 is a front view of the structural buffer tray of the present invention;

5 is a schematic diagram of a partial cross-sectional view of the buffer tray of the structure of the present invention from the left side;

Fig. 6 is a cross-sectional view of the structure of the present invention at A-A;

7 is a partial cross-sectional schematic diagram of the right side view of the buffer tray of the structure of the present invention;

FIG8 is a partial cross-sectional schematic diagram of the buffer structure of the present invention.

In the figure: 1-body, 2-motor fixed base, 3-generator, 4-first rotating shaft, 5-brake box, 6-support block, 7-fan blade, 8-second rotating shaft, 9-positioning rod, 10-positioning sleeve, 11-connecting rod, 12-lifting plate, 13-threaded sleeve, 14-threaded rod, 15-block, 16-three-phase asynchronous motor, 17-fixing rod, 18-maintenance port, 19-coupling, 20-sleeve, 21-hydraulic telescopic rod, 22-fixing ring, 23-buffer disk, 24-annular brake pad, 25-limiting ring, 26-brake disc, 27-brake groove, 28-retaining ring, 29-limiting bolt, 30-insertion key, 31-sliding ring, 32-insertion rod, 33-annular slide groove, 34-insertion rod groove, 35-slider, 36-cavity, 37-elastic body, 38-arc slider, 39-key groove.

Detailed ways

The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 6, a wind turbine brake device includes a body 1, a motor fixed base 2 is fixedly installed on one side of the body 1, a generator 3 is fixedly installed on one side of the top of the motor fixed base 2, a power input end of the generator 3 is fixedly connected to the driven end of the first rotating shaft 4, the active end of the first rotating shaft 4 extends into the brake box 5, the active end of the first rotating shaft 4 is connected to the driven end of the second rotating shaft 8, and the active end of the second rotating shaft 8 is fixedly installed with a fan blade 7; a coupling 19 is provided between the active end of the first rotating shaft 4 and the driven end of the second rotating shaft 8, support blocks 6 are fixedly installed at the four corners of the bottom end of the brake box 5, the bottom end of the support block 6 is fixedly connected to the top of the motor fixed base 2, the other end of the second rotating shaft 8 passes through the body 1, and the fan blade 7 is fixedly installed at one end of the second rotating shaft 8 passing through the body 1; the brake box 5 is close to the generator A sleeve 20 is fixedly connected to the inner wall of one side, the first rotating shaft 4 passes through the sleeve 20 and is rotationally connected thereto, a fixing ring 22 is fixedly installed at the suspended end of the sleeve 20, a hydraulic telescopic rod 21 is arranged between the fixing ring 22 and the inner wall of the brake box 5, the output end of the hydraulic telescopic rod 21 is connected to the fixing ring 22, and the fixed end of the hydraulic telescopic rod 21 is connected to the inner wall of the brake box 5; the hydraulic telescopic rod 21 is connected to the output end of the hydraulic system through a pipeline, and the hydraulic system is connected to the output end of the wind turbine control system. When the wind speed is too high, the wind turbine control system sends a braking command to the hydraulic system, and the hydraulic system extends the hydraulic telescopic rod 21 through its output end, and the hydraulic telescopic rod 21 causes the fixing ring 22, the buffer disk 23 and the annular brake pad 24 to move toward the direction of the brake disk 26, and the annular brake pad 24 contacts the brake groove 27 one by one and decelerates to stop through friction.

The annular brake pad 24 includes a plurality of coaxial brake pads, the diameter of which increases and the width decreases from the axis to the outside; a brake groove 27 is provided on the end surface of the brake disc 26 opposite to the annular brake pad 24, the number of the brake grooves 27 is consistent with the number of the brake pads, and the width, depth and diameter of the brake groove 27 are matched one-to-one with the thickness, width and diameter of the plurality of brake pads; the annular brake pad 24 can be inserted into its corresponding brake groove 27, and the end surface of the annular brake pad 24 can contact the bottom surface of the brake groove 27 and exert a braking effect through friction.

One end of the buffer disk 23 is provided with an annular groove 33 along the circumferential direction, and a rod slot 34 is provided in the annular groove 33. At least two arc-shaped sliders 38 are provided in the rod slot 34. One end of the arc-shaped slider 38 is connected to the slider 35, and the other end is against one end of the rod 32 extending into the rod slot 34; a cavity 36 is provided at a position corresponding to the arc-shaped slider 38, and an elastic body 37 and a slider 35 are provided in the cavity 36. The two ends of the slider 35 are respectively connected to the elastic body 37 and the arc-shaped slider 38, and the end of the arc-shaped slider 38 extending into the cavity 36 is connected to the slider 35. A limit block for limiting the slider 35 is provided at the opening of the cavity 36, and the limit block limits the slider 35 and the elastic body 37 inside the cavity 36; the adjacent two buffer disks 23 are connected by the rod 32, and one end of the rod 32 extends into the rod slot 34, and the other end is fixedly connected to the other end face of the buffer disk.

A sliding ring 31 is provided at the other end of the buffer disk 23, and an insertion rod 32 is fixedly provided on the sliding ring 31. The position of the insertion rod 32 corresponds to the insertion rod groove 34 on another buffer disk 23, and two adjacent buffer disks 23 are connected by the insertion rod 32 extending into the insertion rod groove 34.

The buffer tray 23 includes a first buffer tray 231, a second buffer tray 232 and a third buffer tray 233, wherein one end of the first buffer tray 231 is connected to the fixing ring 22, and the other end is connected to the second buffer tray 232 via an insert rod 32, and both ends of the second buffer tray 232 are respectively connected to the first buffer tray 231 and the third buffer tray 233 by insert rods 32.

One end of the third buffer disk 233 is connected to the annular brake pad fixing disk 40. The annular brake pad 24 is fixedly arranged on one side of the annular brake pad fixing disk 40, and the insertion rod 32 is fixedly arranged on the other side. The insertion rod 32 extends into the insertion rod groove 34 of the third buffer disk 233 and is connected to the third buffer disk 233.

The portion of the rod 32 that extends into the rod slot 34 is provided with an arc-shaped protrusion to prevent it from escaping from the rod slot 34. After the rod 32 extends into the rod slot 34, the arc-shaped slider 38 presses the side of the rod slot 34, and the arc-shaped slider 38 clamps the rod 32 in the rod slot 34 through the arc-shaped protrusion.

As an optional embodiment of the present invention, the elastic body 37 is a cylindrical spring or a cylindrical rubber body.

When the fan brakes, the annular brake pad 24 drives the first buffer disk 233 connected to it to rotate, and the plug rod 32 fixedly connected to the buffer disk 23 pushes the arcuate slider 38 toward the arcuate slider 38. The arcuate slider 38 applies pressure to the elastomer 37 in the cavity 36, and the elastomer 37 absorbs its pressure impact. The present invention is provided with three buffer disks 23, which absorb the pressure impact step by step. The buffer disk 23 can effectively buffer the impact brought by the disc brake pad 24 during braking, avoid the brake disk 26 and the annular brake pad 24 from being subjected to rigid impact, and extend the life of the annular brake pad 24 and the brake disk 26.

A plurality of buffer discs 23 are arranged at one end of the fixing ring 22 close to the brake disc 26, and the buffer disc 23 is fixedly connected to the fixing ring 22. On the two opposite side walls of two adjacent buffer discs 23, one side is fixedly connected with a sliding ring 31, and the sliding ring 31 is evenly and fixedly connected with three plug rods 32 along the circumferential direction. The free end of the plug rod 32 is provided with an arc-shaped protrusion, and an annular groove 33 is arranged on the side wall of the buffer disc 23 on the other side. Three plug rod grooves 34 corresponding to the plug rod 32 are evenly and fixedly arranged on the annular groove 33. The inner wall of the punching plate 23 is evenly provided with three cavities 36 in an annular shape. The side of the cavity 36 is in an arc shape. An elastic body 37 and a slider 35 are arranged in the cavity 36. One end of the elastic body 37 is connected to the inner wall of the cavity, and the other end is connected to the slider 35. The slider 35 slides along the arc direction in the cavity 36. One end of the arc slider 38 extends into the cavity 36 and is connected to the slider 35. The other end of the arc slider 38 passes through the cavity 36 and extends into the rod slot 34. The arc slider 38 can slide along the circumferential direction thereof. Multiple buffer plates 23 are connected in sequence.

The rightmost buffer disk 23 and the brake pad are fixedly connected by welding. First, align the insertion rod 32 with the insertion rod groove 34. Refer to Figure 6. This will cause the arc-shaped slider 38 to move into the cavity 36 under force, and the elastomer 37 is compressed under force, and the sliding ring 31 will enter the annular groove 33. The shape of the insertion rod 32 is shown in the figure. In the absence of external force, because the arc-shaped slider 38 limits the displacement of the insertion rod 32 through the arc-shaped protrusion on the insertion rod 32, two adjacent buffer disks 23 can be connected.

Three annular brake pads 24 are fixedly mounted on the buffer disk 23 near the side of the fan blade 7. The width, depth and diameter of the brake groove 27 are matched one by one with the thickness, width and diameter of the plurality of coaxial brake pads. The coaxial brake pads can be inserted into their corresponding brake grooves 27, and the coaxial brake pads can slide in the brake grooves 27; a key 30 is fixedly mounted on the first rotating shaft 4, a limit ring 25 is fixedly mounted on the first rotating shaft 4, and the limit ring 25 is in close contact with the key 30; a sleeve is provided on the first rotating shaft 4 that can slide along the axial direction of the rotating shaft The brake disc 26 has a key groove 39, and one end of the brake disc 26 close to the annular brake pad 24 is provided with three brake grooves 27. The inner diameters of the three brake grooves 27 are arranged in descending order, and their sizes correspond to the annular brake pads 24 one by one. The widths of the three brake grooves 27 are the same as the widths of the three annular brake pads 24, and the brake grooves 27 have the same axis as the annular brake pads 24. A limiting bolt 29 is screwed on the first rotating shaft 4, and the limiting bolt 29 is in contact with the side wall of the brake disc 26 to limit the brake disc 2 6, specifically limiting the axial position of the brake disc 26 to open a maintenance port 18 at the top of the brake box 5, a positioning rod 9 is fixedly installed on the top of the brake box 5, a positioning sleeve 10 is slidably connected to the positioning rod 9, the positioning sleeve 10 is fixedly connected to a connecting rod 11, the connecting rod 11 is fixedly connected to the driven end of the lifting plate 12, the lifting plate 12 is fixedly embedded with a threaded sleeve 13, the threaded sleeve 13 is arranged on the threaded rod 14, the threaded sleeve 13 moves up and down along the threaded rod 14, the top of the threaded rod 14 is fixedly provided with a stopper 15, the bottom of the threaded rod 14 is fixed with The output end of the three-phase asynchronous motor 16 is connected, the bottom end of the three-phase asynchronous motor 16 is fixedly installed on the top of the brake box 5, the maintenance port 18 is arranged between the three-phase asynchronous motor 16 and the positioning rod 9, the bottom end of the lifting plate 12 is fixedly connected with a fixing rod 17, and the bottom end of the fixing rod 17 is fixedly installed with a snap ring 28, the cross-section of the snap ring 28 is U-shaped, the snap ring 28 is sleeved on the outside of the brake disc 26, and a gap is provided between the brake disc 26 and the snap ring 28, the brake disc 26 can rotate relative to the snap ring 28, and the maintenance port 18 is opened directly above the brake disc 26.

The length and width of the maintenance opening 18 are greater than the width and diameter of the clamping ring 28 by 5-6 cm.

The thickness of the annular brake pad 24 is the same as the width of the brake groove 27 .

The limiting ring 25 is fixedly connected to the first rotating shaft 4 by welding.

The hydraulic telescopic rod 21 is connected to the hydraulic station through a pipeline.

As an optional embodiment of the present invention, the thickness of the annular brake pad 24 increases as its diameter increases, and the opening width of the brake groove 27 is equal to the thickness of the annular brake pad 24 having the same diameter as that of the annular brake pad 24 .

Working principle: First, fix and install the device, arrange and combine multiple buffer disks 23 in sequence, align the sliding ring 31 and the plug rod 32 with the annular slide groove 33 and the plug rod groove 34 on the side walls of the adjacent buffer disks 23 for plugging. At this time, the arc-shaped slider 38 is forced to move into the cavity 36, and the elastic body 37 is compressed by the force, so that multiple buffer disks 23 can be connected, and then the side walls on both sides of the multiple buffer disks 23 are fixed to the fixed ring 22 and the three annular brake pads 24 in sequence. When the wind force is too strong, causing the generator 3 to rotate too fast, the control system sends a command to the hydraulic system to start the hydraulic telescopic rod, and the hydraulic system provides thrust to the hydraulic telescopic rod 21 through its output end. At this time, the hydraulic telescopic rod 21 is started. As shown in Figure 1, the hydraulic telescopic rod 21 pushes the fixed ring 22 to move in the direction of the brake disk 26, and at the same time drives the multiple buffer disks 23 to the brake The wheel disc 26 moves in the direction of rotation, so that the three annular brake pads 24 enter the three brake grooves 27 on the brake disc 26 in turn. The corresponding three annular brake pads 24 have different widths, and the widths of the three brake grooves 27 are also different. The wider annular brake pad 24 enters the corresponding brake groove 27 first, and then the remaining annular brake pads 24 enter in turn, which plays a role of braking step by step, thereby ensuring that the device can perform normal braking while indirectly extending the service life of the annular brake pad 24. The friction force is dispersed by the three annular brake pads 24, so as to achieve the effect of increasing the service life of the device. Moreover, when the annular brake pad 24 and the brake groove 27 generate friction, the generated reaction force will be dispersed and weakened by the elastic force of the elastomer 37 in the cavity 36, thereby ensuring the stability of the connection between the fixing ring 22 and the buffer disc 23, so that it can better complete the fixing work.

When performing maintenance work on the annular brake pad 24 and the brake disc 26, as shown in Figure 1, the generator 3 is first disassembled and the limiting bolt 29 on the first rotating shaft 4 is rotated, so that it moves to the left together with the first rotating shaft 4, and the first rotating shaft 4 is separated from the coupling 19; when one end of the first rotating shaft 4 is separated from the brake disc 26, the side wall of the limiting ring 25 is just in contact with the side wall of the sleeve 20, and the limiting ring 25 is fixed on the first rotating shaft 4. When the first rotating shaft 4 moves to the left together with the motor, the limiting ring 25 will enter between the multiple buffer disks 23 and fit with the sleeve 20, and the three-phase asynchronous motor 16 will be started. The lifting plate 12 is driven to move upward by the rotation of the threaded rod 14, and the brake disc 26 is pulled out of the brake box 5 through the maintenance port 18 through the fixing rod 17 and the snap ring 28 for maintenance. It is simple and convenient, and the operation saves time and effort, solves the problem of inconvenient traditional maintenance, and makes the device more practical.

The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (10)

1. A wind turbine generator brake device, characterized in that it comprises a first rotating shaft (4), a brake box (5), a hydraulic telescopic rod (21), a buffer plate (23), a fixing ring (22), an annular brake pad (24) and a brake disc (26); the driven end of the first rotating shaft (4) is connected to the power input end of the generator (3), and the active end of the first rotating shaft (4) is connected to the power output end of the fan blade (7); The first rotating shaft (4) is arranged in the brake box (5) along the horizontal direction, and the brake disc (26), the annular brake pad (24), the buffer disc (23), the fixed ring (22) and the hydraulic telescopic rod (21) are arranged in sequence from the active end to the driven end of the first rotating shaft (4); the fixed end of the hydraulic telescopic rod (21) is connected to the inner wall of the brake box (5), and the free end thereof is connected to the fixed ring (22), and the fixed ring (22) is connected to the buffer disc (23); one end of the buffer disc (23) is provided with an annular slide groove (33) along the circumferential direction, and the annular slide groove (33) A rod slot (34) is provided in the annular brake pad (24), the annular brake pad fixed disk (40), an insertion rod (32) is provided between the annular brake pad fixed disk (40) and the buffer disk (23), one end of the insertion rod (32) is connected to the annular brake pad fixed disk (40), the other end of the insertion rod (32) is inserted into the insertion rod slot (34), an elastic body (37) is provided between the side wall of the insertion rod slot (34) and the insertion rod (23); a brake slot (27) is provided on the brake disk (26), the annular brake pad (24) can be inserted into the brake slot, The annular brake pad (24) comprises a plurality of coaxial brake pads, the diameter of the coaxial brake pads increasing in sequence and the width decreasing in sequence from the axis to the outside; a brake groove (27) is provided on the end surface of the brake disc (26) opposite to the annular brake pad (24); the number of the brake grooves (27) is consistent with the number of the plurality of coaxial brake pads, and the width, depth and diameter of the brake groove (27) are matched one-to-one with the thickness, width and diameter of the plurality of coaxial brake pads, and the plurality of coaxial brake pads can be inserted into their corresponding brake grooves (27); The hydraulic telescopic rod (21) is connected to the output end of the hydraulic system via a pipeline. 2. The wind turbine brake device according to claim 1, characterized in that the width difference between two adjacent annular brake pads (24) is equal to the depth difference between two adjacent brake grooves (27). 3. The wind turbine brake device according to claim 1 is characterized in that at least two arc-shaped sliders (38) are arranged in the rod slot (34), a cavity (36) is arranged at a position corresponding to the arc-shaped slider (38), an elastic body (37) and a slider (35) are arranged in the cavity (36), two ends of the slider (35) are respectively connected to the elastic body (37) and the arc-shaped slider (38), one end of the arc-shaped slider (38) extending into the cavity (36) is connected to the slider (35), and the other end is abutted against one end of the rod (32) extending into the rod slot (34); a limit block for limiting the slider (35) is arranged at the opening of the cavity (36), and the limit block limits the slider (35) and the elastic body (37) inside the cavity (36). 4. The wind turbine generator brake device according to claim 3 is characterized in that the buffer disk (23) comprises a first buffer disk (231), a second buffer disk (232) and a third buffer disk (233), wherein one end of the first buffer disk (231) is connected to the fixing ring (22), and the other end is connected to the second buffer disk (232) through an insertion rod (32), and the two ends of the second buffer disk (232) are respectively connected to the first buffer disk (231) and the third buffer disk (233) by an insertion rod (32); one end of the third buffer disk (233) is connected to the annular brake pad fixing disk (40), one side of the annular brake pad fixing disk (40) is fixedly provided with an annular brake pad (24), and the other side of the annular brake pad fixing disk (40) is fixedly provided with an insertion rod (32), and the insertion rod (32) extends into the insertion rod groove (34) of the third buffer disk (233) to be connected with the third buffer disk (233). 5. The wind turbine brake device according to claim 4, characterized in that the portion of the insertion rod (32) extending into the insertion rod slot (34) is provided with an arc-shaped protrusion to prevent it from escaping from the insertion rod slot (34). 6. The wind turbine brake device according to claim 4 is characterized in that the brake disc (26) is connected to the first rotating shaft (4), and the connecting surface between the brake disc (26) and the first rotating shaft (4) is provided with a keyway (39) and an insertion key (30) for preventing relative rotation therebetween, the keyway (39) and the insertion key (30) cooperate with each other, and a limiting bolt (29) is provided on one side of the brake disc (26). 7. The wind turbine brake device according to claim 1 is characterized in that a maintenance opening (18) is provided on the top of the brake box (5), the length of the maintenance opening (18) is greater than the diameter of the brake disc (26), the width of the maintenance opening (18) is greater than the thickness of the brake disc (26), and a lifting device for lifting the brake disc (26) is provided on the top of the brake box (5), the lifting device comprises a positioning rod (9), a threaded rod (14), a fixing rod (17), a clamping ring (28) and a lifting plate (12), the positioning rod (9) and the threaded rod (14) are provided on the maintenance opening On both sides of the brake disc (26), a threaded sleeve (13) is slidably sleeved on the threaded rod (14), a positioning sleeve (10) is slidably connected on the positioning rod (9), two ends of the lifting plate (12) are respectively connected to the positioning sleeve (10) and the threaded sleeve (17), the middle of the lifting plate (12) is connected to the upper end of the fixing rod (17), the lower end of the fixing rod (17) passes through the maintenance opening (18) and the snap ring (28), the snap ring (28) is arranged on the outside of the brake disc (26), there is a gap between the brake disc (26) and the snap ring (28), and the maintenance opening (18) is opened directly above the brake disc (26). 8. The wind turbine brake device according to claim 7, characterized in that a three-phase asynchronous motor (16) is arranged at the top of the brake box (5), and the active end of the threaded rod (14) is connected to the output end of the three-phase asynchronous motor (16). 9. The wind turbine brake device according to claim 1, characterized in that the active end of the first rotating shaft (4) is connected to the driven end of the second rotating shaft (8) through a coupling (19), and the active end of the second rotating shaft (8) is connected to the fan blade (7). 10. The wind turbine brake device according to claim 1, characterized in that a motor fixing base (2) is arranged below the brake box (5) and the generator (3), the motor fixing base (2) is fixedly connected to the machine body (1), and a support block (6) is arranged between the bottom surface of the brake box (5) and the motor fixing base (2).