A speed limiting and braking structure of a wind power generator

Abstract

The application discloses a speed limiting and brake structure of a wind driven generator, which comprises a supporting column and a cabin, a fixing seat is arranged on the surface of the supporting column and close to the top end, a rotating seat is arranged at the bottom of the cabin, the rotating seat is rotationally connected with the fixing seat, a speed limiting device, a brake device, a speed increaser, a generator and an electrical cabinet are arranged in the cabin, one end of the cabin is rotationally connected with a main shaft, a first bevel gear is fixedly connected on the surface of the main shaft, the first bevel gear is meshingly connected with one side of the speed limiting device, the brake device is arranged on the side close to the speed increaser, and the application relates to the technical field of wind driven power generation. The speed limiting and brake structure of the wind driven generator solves the problem that the existing device utilizing friction deceleration controls the rotating speed of the wind blade, avoids the problem of heat attenuation failure, and reduces the operation and maintenance cost of the fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a speed limiting and braking structure of a wind driven generator. BACKGROUND

[0002] The wind driven generator is a power equipment which converts wind energy into mechanical work, and the mechanical work drives the rotor to rotate, and finally outputs alternating current. The rotation speed of the generator rotor is determined by the rotation speed of the wind blade. Within a certain range, the power generation efficiency increases with the increase of the rotation speed of the wind blade. However, when the rotation speed exceeds the designed speed, the generator will generate too much electricity, which will cause the coil temperature to rise and burn the generator, or the current will be too large to damage the lower-level equipment. Therefore, a speed limiting and braking structure is needed to control the rotation speed. Through the search, most of the existing fans limit the rotation of the wind blade by friction. However, the device using friction to reduce speed will generate a large amount of heat during work. If the heat is not dissipated in time, the heat attenuation phenomenon will occur, resulting in speed limiting failure. At the same time, the brake pad is a consumable product, which needs to be repaired and replaced at irregular intervals, increasing the operation and maintenance cost of the fan. SUMMARY

[0003] (I) Technical problems solved

[0004] In view of the deficiencies of the prior art, the present application provides a speed limiting and braking structure of a wind driven generator, which solves the problem of controlling the rotation speed of the wind blade by the device using friction to reduce speed, avoids the problem of heat attenuation failure, and reduces the operation and maintenance cost of the fan.

[0005] (II) Technical solutions

[0006] In order to achieve the above purpose, the present application is implemented by the following technical solutions: a speed limiting and braking structure of a wind driven generator, comprising a support column and a cabin, a fixing seat is arranged on the surface of the support column and close to the top end, a rotating seat is arranged at the bottom of the cabin, the rotating seat is rotatably connected with the fixing seat, a speed limiting device, a brake device, a speed increaser, a generator and an electrical cabinet are arranged in the cabin, one end of the cabin is rotatably connected with a main shaft, a first bevel gear is fixedly connected to the surface of the main shaft, the first bevel gear is meshingly connected with one side of the speed limiting device, the brake device is arranged on one side close to the speed increaser;

[0007] The brake device comprises a first half ring, a second half ring and a support frame, the first half ring and the second half ring are arranged on the surface of the main shaft, the first half ring and the second half ring are fixed on the surface of the main shaft by bolts, two support frames are symmetrically arranged on both sides of the main shaft, an arc-shaped pressing plate is rotatably connected to the top of the side of the support frame close to the main shaft, an actuator is rotatably connected to the top of the side of the support frame away from the main shaft, a rotating seat is fixedly connected to the top side of the arc-shaped pressing plate, and the working end of the actuator is rotatably connected with the rotating seat.

[0008] The speed limiting device comprises a box body, a first partition plate and a second partition plate are arranged in the box body, a first connecting shaft is rotatably connected between the second partition plate and the inner wall of the box body, one end of the first connecting shaft extends to the outside of the box body and is fixedly connected with a second bevel gear, the first bevel gear is meshingly connected with the second bevel gear, a second connecting shaft is rotatably connected between the first partition plate and the second partition plate, a clutch is fixedly connected between one end of the second connecting shaft and one end of the first connecting shaft, a third connecting shaft is rotatably connected between the first partition plate and the box body, a vane is arranged on the surface of the third connecting shaft and located on the left side of the first partition plate, a first transmission gear is fixedly connected to one end of the third connecting shaft, a second transmission gear is fixedly connected to the surface of the second connecting shaft, the first transmission gear is meshingly connected with the second transmission gear, and lubricating oil is arranged in the space surrounded by the left side of the first partition plate and the box body.

[0009] Preferably, the top end of the support column is provided with a compression ring, the bottom side of the compression ring is fixedly connected with the bottom of the inner wall of the cabin, the inner wall of the support column is provided with a motor and a speed reducer, the motor is in transmission connection with the speed reducer, the output shaft end of the speed reducer is fixedly connected with a gear, the inner wall of the compression ring is provided with a gear slot, and the gear is meshingly connected with the gear slot.

[0010] Preferably, one end of the main shaft extends to the outside of the cabin and is fixedly connected with a vane mounting seat, the other end of the main shaft is in transmission connection with the input end of a speed increaser, and the output end of the speed increaser is in transmission connection with the input end of a generator.

[0011] Preferably, the side of the arc-shaped pressing plate close to the main shaft is provided with a friction plate, one side of the support frame is provided with a reinforcing support rod, and the actuator adopts an electric telescopic rod.

[0012] Preferably, a third partition plate is arranged between the side of the first partition plate and the box body and above the vane, a surface of the third partition plate is provided with an electromagnetic valve, the bottom side of the box body is provided with an oil pump, and the outlet end of the oil pump is communicated with a pipeline and extends above the third partition plate.

[0013] Preferably, one side of the inner wall of the box body is provided with a liquid level meter.

[0014] Preferably, one side of the top of the inner wall of the cabin is provided with a control box and an angle sensor, a connecting shaft is rotatably connected to the top of the cabin, the top end of the connecting shaft is provided with a wind deflector, and the bottom end of the connecting shaft is connected with the detection end of the angle sensor.

[0015] (Three) beneficial effects

[0016] The application provides a speed limiting and braking structure of a wind driven generator.

[0017] The speed limiting and braking structure of the wind driven generator has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the whole structure of the application;

[0019] Figure 2 It is an enlarged view of A in the application; Figure 1

[0020] Figure 3 It is a distribution schematic diagram of the speed limiting device and the braking device of the application;

[0021] Figure 4 It is an internal structure of the speed limiting device of the application Figure 1 ;

[0022] Figure 5 It is an internal structure of the speed limiting device of the application Figure 2 ;

[0023] Figure 6 It is a structure schematic diagram of the braking device of the application.

[0024] In the figure: 1 - support column, 2 - machine cabin, 3 - fixed seat, 4 - rotating seat, 5 - pressing ring, 6 - motor, 7 - speed reducer, 8 - gear, 9 - main shaft, 10 - blade mounting seat, 11 - speed limiting device, 111 - box body, 112 - first partition plate, 113 - second partition plate, 114 - first connecting shaft, 115 - second bevel gear, 116 - second connecting shaft, 117 - clutch, 118 - third connecting shaft, 119 - liquid level meter, 1110 - first transmission gear, 1111 - blade, 1112 - third partition plate, 1113 - electromagnetic valve, 1114 - oil pump, 12 - first bevel gear, 13 - braking device, 131 - first half ring, 132 - second half ring, 133 - support frame, 134 - arc-shaped pressing plate, 135 - execution member, 136 - rotating seat, 14 - speed increaser, 15 - generator, 16 - electrical cabinet, 17 - control box, 18 - angle sensor, 19 - connecting shaft, 20 - wind deflector. DETAILED DESCRIPTION​

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0026] Please refer to Figures 1-6 The present application provides a technical solution: a speed limiting and brake structure of a wind driven generator, comprising a support column 1 and a cabin 2, a fixing seat 3 is arranged on the surface of the support column 1 and close to the top end, a rotating seat 4 is arranged on the bottom of the cabin 2, the rotating seat 4 is rotationally connected with the fixing seat 3, a pressing ring 5 is arranged on the top end of the support column 1, the bottom side of the pressing ring 5 is fixedly connected with the bottom of the inner wall of the cabin 2, a motor 6 and a speed reducer 7 are arranged on the inner wall of the support column 1, the motor 6 is drivingly connected with the speed reducer 7, a gear 8 is fixedly connected with the output shaft end of the speed reducer 7, a gear slot is arranged on the inner wall of the pressing ring 5, the gear 8 is meshingly connected with the gear slot, the motor 6 drives the gear 8 to rotate through the speed reducer 7, so as to drive the cabin 2 to rotate through the pressing ring 5, and the windward angle of the wind driven blade is adjusted;

[0027] A speed limiting device 11, a brake device 13, a speed increaser 14, a generator 15 and an electrical cabinet 16 are arranged in the cabin 2, a main shaft 9 is rotationally connected with one end of the cabin 2, a first conical gear 12 is fixedly connected with the surface of the main shaft 9, the first conical gear 12 is meshingly connected with one side of the speed limiting device 11, and the brake device 13 is arranged on the side close to the speed increaser 14;

[0028] The brake device 13 includes a first half ring 131, a second half ring 132 and a support frame 133, the first half ring 131 and the second half ring 132 are arranged on the surface of the main shaft 9, the first half ring 131 and the second half ring 132 are fixed on the surface of the main shaft 9 by bolts, the bolts are arranged at both ends of the first half ring 131 and the second half ring 132, and the distance between the two bolts is greater than the width of the arc-shaped pressing plate 134, so that one side of the arc-shaped pressing plate 134 can be in contact with the surface of the first half ring 131 and the second half ring 132, the clamping of the main shaft 9 is realized, the support frame 133 is arranged in two and symmetrically arranged on both sides of the main shaft 9, the arc-shaped pressing plate 134 is rotatably connected to the top of the side of the support frame 133 close to the main shaft 9, the actuator 135 is rotatably connected to the top of the side of the support frame 133 away from the main shaft 9, the top side of the arc-shaped pressing plate 134 is fixedly connected with the rotating seat 136, the working end of the actuator 135 is rotatably connected with the rotating seat 136, the side of the arc-shaped pressing plate 134 close to the main shaft 9 is provided with a friction plate, one side of the support frame 133 is provided with a reinforcing support rod 137, the actuator 135 adopts an electric telescopic rod, when the brake is needed, the speed of the main shaft 9 is first reduced by the speed limiting device 11, then the arc-shaped pressing plate 134 is driven to move by the actuator 135, the first half ring 131 and the second half ring 132 are clamped by the arc-shaped pressing plate 134, and the speed of the main shaft is reduced to 0.

[0029] The speed limiting device 11 includes a box body 111, a first partition plate 112 and a second partition plate 113 are arranged in the box body 111, a first connecting shaft 114 is rotatably connected between one side of the second partition plate 113 and the inner wall of the box body 111, one end of the first connecting shaft 114 extends to the outside of the box body 111 and is fixedly connected with a second bevel gear 115, a first bevel gear 12 is meshingly connected with the second bevel gear 115, a second connecting shaft 116 is rotatably connected between the first partition plate 112 and the second partition plate 113, a clutch 117 is fixedly connected between one end of the second connecting shaft 116 and one end of the first connecting shaft 114, a third connecting shaft 118 is rotatably connected between one side of the first partition plate 112 and the box body 111, a vane 1111 is arranged on the surface of the third connecting shaft 118 and located on the left side of the first partition plate 112, a first transmission gear 1110 is fixedly connected to one end of the third connecting shaft 118, a second transmission gear 118 is fixedly connected to the surface of the second connecting shaft 116, the first transmission gear 1110 is meshingly connected with the second transmission gear 118, lubricating oil is arranged in the space surrounded by the left side of the first partition plate 112 and the box body 111, a circular ring is arranged on the periphery of the vane 1111 for fixing each single baffle, when the vane 1111 is driven to rotate by the third connecting shaft 118, the rotation of the connecting shaft 118 is resisted due to the resistance of the lubricating oil, the rotating speed of the connecting shaft 118 is reduced, thereby the rotating speed of the first connecting shaft 114 is reduced, and finally the rotating speed of the main shaft 9 is controlled, the lubricating oil adopts high viscosity index engine oil.

[0030] The third partition 1112 is arranged between one side of the first partition 112 and the box body 111 and above the vane 1111, a surface of the third partition 1112 is provided with the electromagnetic valve 1113, one side of the bottom of the box body 111 is provided with the oil pump 1114, an outlet end of the oil pump 1114 is communicated with a pipeline and extends above the third partition 1112, one side of the inner wall of the box body 111 is provided with the liquid level gauge 119, the volume of the bottom lubricating oil can be controlled through the oil pump 1114 and the electromagnetic valve 1113, so that the resistance received by the vane 1111 can be changed, the rotating speed is controlled, and the liquid level gauge 119 is convenient for detecting the position of the internal oil.

[0031] One end of the main shaft 9 extends to the outside of the cabin 2 and is fixedly connected with the vane mounting seat 10, the other end of the main shaft 9 is in transmission connection with the input end of the speed increaser 14, and the output end of the speed increaser 14 is in transmission connection with the input end of the generator 15.

[0032] The control box 17 and the angle sensor 18 are arranged on one side of the top of the inner wall of the cabin 2, the connecting shaft 19 is rotationally connected to the top of the cabin 2, the wind deflector 20 is arranged on the top end of the connecting shaft 19, the bottom end of the connecting shaft 19 is connected with the detection end of the angle sensor 18, the side surface of the wind deflector 20 is parallel to the wind direction under the wind blowing, so that the wind direction is measured, and the angle at which the cabin 2 needs to be rotated can be accurately obtained according to the angle sensor 18, so that the rotating speed of the main shaft 9 is reduced.

[0033] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0034] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A speed limiting and braking structure for a wind turbine, comprising a support column (1) and a nacelle (2), wherein a fixed seat (3) is provided on the surface of the support column (1) near the top, and a first rotating seat (4) is provided on the bottom of the nacelle (2), wherein the first rotating seat (4) is rotatably connected to the fixed seat (3), and is characterized in that: The cabin (2) is provided with a speed limiting device (11), a brake device (13), a speed increaser (14), a generator (15) and an electrical cabinet (16); one end of the cabin (2) is rotatably connected to a main shaft (9); a surface of the main shaft (9) is fixedly connected to a first bevel gear (12); the first bevel gear (12) is meshed with one side of the speed limiting device (11); and the brake device (13) is provided on a side close to the speed increaser (14); The brake device (13) includes a first half ring (131), a second half ring (132) and a support frame (133), wherein the first half ring (131) and the second half ring (132) are arranged on the surface of the main shaft (9), and the first half ring (131) and the second half ring (132) are fixed to the surface of the main shaft (9) by bolts, and the support frame (133) is provided with two and symmetrically arranged on both sides of the main shaft (9), and the top of the support frame (133) close to the main shaft (9) is rotatably connected to an arc pressure plate (134), and the top of the support frame (133) away from the main shaft (9) is rotatably connected to an actuator (135), and the top side of the arc pressure plate (134) is fixedly connected to a second rotating seat (136), and the working end of the actuator (135) is rotatably connected to the second rotating seat (136); The speed limiting device (11) includes a housing (111), wherein a first partition (112) and a second partition (113) are provided in the housing (111), a first connecting shaft (114) is rotatably connected between one side of the second partition (113) and the inner wall of the housing (111), one end of the first connecting shaft (114) extends to the outside of the housing (111) and is fixedly connected to a second bevel gear (115), the first bevel gear (12) is meshed with the second bevel gear (115), a second connecting shaft (116) is rotatably connected between the first partition (112) and the second partition (113), and the second connecting shaft (116) A clutch (117) is fixedly connected between one end of the first connecting shaft (114), a third connecting shaft is rotatably connected between one side of the first partition (112) and the housing (111), a blade (1111) is provided on the surface of the third connecting shaft and on the left side of the first partition (112), a first transmission gear (1110) is fixedly connected to one end of the third connecting shaft, a second transmission gear is fixedly connected to the surface of the second connecting shaft (116), the first transmission gear (1110) is meshed with the second transmission gear, and lubricating oil is provided in the space enclosed by the left side of the first partition (112) and the housing (111); The top of the support column (1) is provided with a pressure ring (5), and one side of the bottom of the pressure ring (5) is fixedly connected to the bottom of the inner wall of the cabin (2). The inner wall of the support column (1) is provided with a motor (6) and a reducer (7), and the motor (6) is transmission-connected to the reducer (7). The output shaft end of the reducer (7) is fixedly connected to a gear (8), and the inner wall of the pressure ring (5) is provided with a tooth groove, and the gear (8) is meshed with the tooth groove.

2. The speed limiting and braking structure of a wind turbine according to claim 1, characterized in that: One end of the main shaft (9) extends to the outside of the nacelle (2) and is fixedly connected to a blade mounting seat (10), the other end of the main shaft (9) is transmission-connected to the input end of a speed increaser (14), and the output end of the speed increaser (14) is transmission-connected to the input end of a generator (15).

3. The speed limiting and braking structure of a wind turbine according to claim 1, characterized in that: A friction plate is provided on one side of the arc-shaped pressure plate (134) close to the main shaft (9), a reinforcing support rod (137) is provided on one side of the support frame (133), and the actuator (135) adopts an electric telescopic rod.

4. The speed limiting and braking structure of a wind turbine according to claim 1, characterized in that: A third partition (1112) is provided between one side of the first partition (112) and the box body (111) and above the blade (1111). A solenoid valve (1113) is provided on the surface of the third partition (1112). An oil pump (1114) is provided on one side of the bottom of the box body (111). The outlet end of the oil pump (1114) is connected to a pipeline and extends to above the third partition (1112).

5. The speed limiting and braking structure of a wind turbine according to claim 4, characterized in that: A liquid level gauge (119) is provided on one side of the inner wall of the box body (111).

6. The speed limiting and braking structure of a wind turbine according to claim 1, characterized in that: A control box (17) and an angle sensor (18) are provided on one side of the top of the inner wall of the cabin (2); a connecting shaft (19) is rotatably connected to the top of the cabin (2); a wind deflector (20) is provided at the top end of the connecting shaft (19); and a bottom end of the connecting shaft (19) is connected to a detection end of the angle sensor (18).

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