CN114623043A - Wind power generator - Google Patents

Abstract

The invention discloses a wind power generator. A main body, a pitch assembly and a transmission assembly, wherein the main body includes a casing, a rotating cover, blades, and a main shaft, a plurality of blades are arranged at intervals, and the plurality of blades are rotatably connected to the rotating cover with uniform intervals; the pitch assembly It includes a first bevel gear and a second bevel gear that mesh with each other. The number of the second bevel gear and the paddle is the same and is connected one by one. The transmission assembly includes a transmission shaft and a connecting piece, and the transmission shaft is coaxially connected to the first bevel gear. The connecting piece is used to connect the drive shaft with the housing. In the present invention, when the angle of the paddle needs to be adjusted, the housing and the transmission shaft are connected by a connecting piece. At this time, the transmission shaft cannot rotate and the paddle still drives the second bevel gears to rotate around the transmission shaft. At this time, the second bevel gear It meshes with the first bevel gear and rotates, and the second bevel gear rotates and drives the corresponding paddle to rotate. When the blade is adjusted to an appropriate angle, the connecting piece separates the housing from the drive shaft to complete the blade change.

Description

Wind Turbines

technical field

The invention relates to the technical field of power generation equipment, in particular to a wind power generator.

Background technique

The current wind generator usually includes a casing, a main shaft, a generator and a plurality of blades. The wind blows the blades, the blades drive the main shaft to rotate, and the main shaft drives the generator to generate electricity. Some wind turbines are also equipped with pitch systems.

Pitch control technology is to control the aerodynamic torque and aerodynamic power captured by the wind rotor by adjusting the pitch angle of the blades and changing the angle of attack of the airflow on the blades. As one of the core parts of the large-scale wind turbine control system, the pitch system plays a very important role in the safe, stable and efficient operation of the wind turbine. Stable pitch control has become one of the hotspots and difficulties in the current research on large-scale wind turbine control technology.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a wind power generator, aiming at solving how to provide a stable wind power generator.

In order to achieve the above-mentioned purpose, the wind power generator proposed by the present invention includes:

The main body, the main body includes a casing, a rotating cover, a paddle and a main shaft, the paddles are arranged at intervals, and the plurality of the paddles are rotatably connected to the rotating cover at uniform intervals. The rotating cover is driven to rotate, the main shaft is fixed with the rotating cover, and the main shaft rotates in the casing;

A pitch assembly, the pitch assembly includes a first bevel gear and a second bevel gear, the second bevel gear and the paddles have the same number and are connected in one-to-one correspondence; the first bevel gear and the first bevel gear The two bevel gears mesh with each other;

A transmission assembly, the transmission assembly rotates in the housing, the transmission assembly includes a transmission shaft and a connecting piece, the transmission shaft is coaxially connected to the first bevel gear, and the connecting piece is used to connect the transmission The shaft is connected to the housing.

Preferably, the main shaft of the wind power generator is tubular, the transmission shaft is rotatably arranged in the main shaft, and the connecting piece is arranged in the casing.

Preferably, each of the second bevel gears is provided with a rotating shaft, an outer peripheral wall of the transmission shaft is provided with an annular groove, and the rotating shaft is inserted and slid into the annular groove.

Preferably, the connecting piece is a hydraulic cylinder, the hydraulic cylinder includes a cylinder body and a piston rod, the cylinder body is arranged on the housing, and a peripheral wall of the transmission shaft is provided with a plug for the piston rod to be inserted. jack.

Preferably, a plurality of the sockets are arranged at intervals around the transmission shaft.

Preferably, the wind generator further includes a sensor for detecting the angle of the blade, and the sensor is electrically connected to the connector.

Preferably, a plurality of the sensors are provided corresponding to the number of the paddles and are arranged in a one-to-one correspondence, and each of the sensors detects the corresponding paddles.

Preferably, the wind power generator further comprises a wind detection component, and the wind detection component is electrically connected with the connecting member.

Preferably, the paddle is connected to the second bevel gear, the second bevel gear rotates on the rotating cover through a second bearing, the second bearing includes a second inner ring and a second outer ring, the first Two inner rings are coaxially fixed on the end surface of the second bevel gear away from the first bevel gear, the second outer ring is coaxially sleeved and rotated outside the second inner ring, the second outer ring The outer wall is fixed to the rotating cover.

Preferably, a generator body is further arranged in the casing, and the generator body is connected with the transmission shaft.

In the technical solution of the present invention, when the equipment is in normal operation, the blades are blown and rotated by the wind, and the plurality of blades drive the main shaft to rotate and generate electricity through the generator. At this time, the plurality of blades drive the transmission shaft to rotate through the meshing of the second bevel gear with the first bevel gear, and both the transmission shaft and the main shaft rotate in the casing. When the angle of the paddle needs to be adjusted, the casing and the transmission shaft are connected by the connecting piece. At this time, the transmission shaft cannot rotate and the paddle still drives the second bevel gears to rotate around the transmission shaft. At this time, the second bevel gear is connected to the first The bevel gear meshes and rotates, and the second bevel gear rotates and drives the corresponding paddle to rotate. When the blade is adjusted to an appropriate angle, the connecting piece separates the housing from the transmission shaft, and the transmission shaft continues to rotate to complete the blade change. The design realizes the change of the blade angle through the power driven by the wind to drive the blade rotation, does not require additional power, and saves costs. In addition, one first bevel gear drives a plurality of second bevel gears and the corresponding blades to rotate at the same time, so that the plurality of blades are simultaneously pitched, and the stability of the blade change is improved.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic diagram of the overall structure of a wind turbine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of a wind turbine according to an embodiment of the present invention.

Description of reference numbers:

label name label name 100 Pitch components 400 swivel cover 101 first bevel gear 500 paddle 102 second bevel gear 600 Spindle 200 Transmission components 700 jack 201 transmission shaft 800 first bearing 202 hydraulic cylinder 900 sensor 2021 cylinder 110 second bearing 2022 piston rod 120 Ring groove 300 case 130 shaft

The object realization, functional features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the invention, unless otherwise expressly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense, for example, "fixed" can be a fixed connection, a detachable connection, or an integrated; it can be A mechanical connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise explicitly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Referring to FIGS. 1 to 2 , in an embodiment of the present invention, a wind power generator is proposed. The wind power generator includes: a main body, a pitch assembly 100 and a transmission assembly 200 , wherein the main body includes a casing 300 , a rotating cover 400, a paddle 500 and a main shaft 600, a plurality of the paddles 500 are arranged at intervals, and a plurality of the paddles 500 are rotatably connected to the rotating cover 400 at uniform intervals, and the paddles 500 drive the rotation The cover 400 rotates, the main shaft 600 is fixed with the rotating cover 400, and the main shaft 600 rotates in the housing 300; the pitch assembly 100 includes a first bevel gear 101 and a second bevel gear 102, the The number of the second bevel gears 102 and the paddles 500 is the same and is connected one-to-one; the first bevel gear 101 and the second bevel gear 102 mesh with each other; the transmission assembly 200 rotates on the housing 300 Inside, the transmission assembly 200 includes a transmission shaft 201 and a connecting piece, the transmission shaft 201 is coaxially connected to the first bevel gear 101 , and the connecting piece is used to connect the transmission shaft 201 with the housing 300 .

When the equipment is in normal operation, the blades 500 are rotated by the wind, and the plurality of blades 500 drive the main shaft 600 to rotate and generate electricity through the generator. At this time, the plurality of paddles 500 drive the transmission shaft 201 to rotate through the meshing of the second bevel gear 102 and the first bevel gear 101 , and the transmission shaft 201 and the main shaft 600 both rotate in the housing 300 . When the angle of the paddle 500 needs to be adjusted, the casing 300 is connected with the transmission shaft 201 by the connecting piece. At this time, the transmission shaft 201 cannot rotate and the paddle 500 still drives the second bevel gears 102 to rotate around the transmission shaft 201. The second bevel gear 102 meshes with the first bevel gear 101 and rotates, and the second bevel gear 102 rotates and drives the corresponding paddle 500 to rotate. After the paddle 500 is adjusted to an appropriate angle, the connecting piece separates the housing 300 from the transmission shaft 201 , and the transmission shaft 201 continues to rotate to complete the change of the paddle 500 . The present design realizes the change of the angle of the blade 500 through the power of the rotation of the blade 500 driven by the wind, and does not require additional power and saves costs. In addition, one first bevel gear 101 drives the plurality of second bevel gears 102 and the corresponding paddles 500 to rotate at the same time, so that the plurality of paddles 500 are simultaneously pitched, and the stability of the paddles 500 is improved.

In one embodiment, according to the existing common wind turbine configuration, there are three blades 500 and are evenly spaced around the main shaft 600 . Therefore, there are also three second bevel gears 102 in the present invention, corresponding to each paddle 500 , and the paddles 500 are fixed in a direction corresponding to the direction away from the teeth of the second bevel gear 102 . The second bevel gear 102 rotates on the rotating cover 400 through the second bearing 110 .

Because the main shaft 600 and the transmission shaft 201 need to be collinear, the main shaft 600 of the wind turbine is tubular, the transmission shaft 201 and the main shaft 600 are coaxially and rotatably arranged in the main shaft 600 ; The main shaft 600 rotates in the transmission shaft 201 to avoid interference between the main shaft 600 and the transmission shaft 201 .

Further, each of the second bevel gears 102 is provided with a rotating shaft, the outer peripheral wall of the transmission shaft 201 is provided with a ring groove 120 , and the rotating shaft is inserted and slid into the ring groove 120 . Because the transmission shaft 201 is coaxial with the main shaft 600 , the rotating shaft of the second bevel gear 102 rotates in the annular groove 120 , and the annular groove 120 guides the rotating shaft, improving the running stability of the second bevel gear 102 and the paddle 500 .

Specifically, the rotating shaft is coaxially fixed to one end of the second bevel gear 102 close to the transmission shaft 201 , the annular groove 120 is coaxially opened at one end of the transmission shaft 201 close to the paddle 500 , and the rotating shaft extends into the annular groove 120 .

Specifically, one end of the main shaft 600 is fixed to the rotating cover 400 , and the length of the main shaft 600 is shorter than the length of the transmission shaft 201 . One end of the transmission shaft 201 away from the blade 500 extends to the outside of the main shaft 600 . When the connecting piece is connected with the transmission shaft 201, the interference of the main shaft 600 is avoided.

Further, the connector is a hydraulic cylinder 202, the hydraulic cylinder 202 includes a cylinder block 2021 and a piston rod 2022, the cylinder block 2021 is disposed in the housing 300, and the outer peripheral wall of the transmission shaft 201 is provided with an insertion hole 700 for the piston rod 2022 to be inserted. When the piston rod 2022 is inserted into the insertion hole 700 , the connection between the transmission shaft 201 and the housing 300 is realized.

Specifically, the cylinder body 2021 is fixed on the inner wall of the housing 300 , the piston rod 2022 penetrates and slides on one end of the cylinder body 2021 close to the transmission shaft 201 , and the piston rod 2022 is coaxially arranged with the cylinder body 2021 . The axis of the piston rod 2022 is perpendicular to the axis of the transmission shaft 201. When the hydraulic cylinder 202 is activated, the piston rod 2022 of the hydraulic cylinder 202 extends and abuts against the peripheral wall of the transmission shaft 201. When the insertion hole 700 of the transmission shaft 201 rotates to the corresponding After the position, the piston rod 2022 penetrates into the socket 700. It is worth noting that, in order to avoid damage and breakage of the hydraulic cylinder 202 , a reinforcing member can be adapted to avoid damage to the hydraulic cylinder 202 .

It is worth noting that a hydraulic element for supplying energy to the hydraulic cylinder 202 is adapted to be provided in the housing 300 , and the hydraulic element may be a hydraulic pump.

In another embodiment of the present invention, the connector is a plug, and the plug has high structural strength and is not easy to break.

In yet another embodiment of the present invention, the connecting member is an electric push rod.

Further, a plurality of insertion holes 700 are provided at intervals around the transmission shaft 201 . The arrangement of the plurality of jacks 700 enables the piston rod 2022 to enter the corresponding jack 700 as quickly as possible, thereby preventing the piston rod 2022 from staring at the transmission shaft 201 and causing an error in accuracy.

Specifically, the plurality of insertion holes 700 are evenly spaced around the axis of the transmission shaft 201 . In this embodiment, five jacks 700 are provided.

Further, the transmission shaft 201 is connected to the main shaft 600 through the first bearing 800 . The main shaft 600 ensures the stable rotation of the transmission shaft 201 in the main shaft 600 .

Specifically, the bearing includes a first outer ring and a first inner ring, the outer wall of the first outer ring is fixed to the inner wall of the main shaft 600, the inner wall of the first inner ring is fixed to the outer wall of the transmission shaft 201, the first inner ring and the first outer ring are fixed to the inner wall of the main shaft 600. The rings are coaxially arranged and the first inner ring rotates inside the first outer ring. It is worth noting that, in order to stably rotate the transmission shaft 201 in the main shaft 600, a plurality of bearings may be provided along the length of the transmission shaft 201, and there may be an interval between two adjacent bearings. Multiple bearings can be evenly spaced.

Further, the wind generator further includes a sensor 900, the sensor 900 is used for detecting the angle of the blade 500, and the sensor 900 is electrically connected with the connecting piece. The angle of the blade 500 is measured by the sensor 900. When the angle of the blade 500 is not good, the sensor 900 detects and transmits the signal to the hydraulic cylinder 202. The piston rod 2022 of the hydraulic cylinder 202 is inserted into the corresponding socket 700, and the transmission shaft 201 stops rotating, and the angle of the paddle 500 changes. When the angle of the blade 500 reaches the desired angle, the sensor 900 detects and transmits an electrical signal to the hydraulic cylinder 202, which retracts the piston rod 2022. It is worth noting that it takes time for the piston rod 2022 of the hydraulic cylinder 202 to expand and contract, so the sensor 900 can transmit an electrical signal to the hydraulic cylinder 202 in advance according to the time.

Further, a plurality of sensors 900 are provided corresponding to the number of paddles 500 and are arranged in one-to-one correspondence, and each sensor 900 detects the corresponding paddle 500 . A plurality of sensors 900 detect the blades 500, and can detect the angle of each blade 500. When the angle of one of the blades 500 is different from the angle of the other blades 500, it means that the blade 500 has a problem, and the sensor 900 transmits a signal to Control center for easy maintenance by staff. In addition, the detection of multiple sensors 900 can improve the sensitivity of detection, reduce interference, and improve the accuracy of angle adjustment of the blade 500 .

Specifically, the sensors 900 are fixed on the rotating cover 400 , and three sensors 900 are arranged around the rotating cover 400 at even intervals.

Further, the wind power generator further includes a wind detection component, and the wind detection component is electrically connected with the connector and the sensor 900 . It is determined whether the angle of the current blade 500 needs to be adjusted through the wind detection component. The wind detection components are commonly used wind detectors or sensors in the market.

Specifically, the wind generator further includes a tower, through which the casing 300 of the wind generator is supported, and the casing 300 , the blades 500 and the rotating cover 400 are away from the ground. The rotating cover 400 is provided with an escape hole for the paddle 500 and the second bevel gear 102 to be placed.

Further, the paddle 500 is connected with the second bevel gear 102 , and the second bevel gear 102 rotates on the rotating cover 400 through the second bearing 110 . The paddle 500 and the second bevel gear 102 are rotated on the rotating cover 400 through the second bearing 110 , thereby reducing the friction between the second bevel gear 102 and the rotating cover 400 and improving the stability of the structure operation. Specifically, the second bearing 110 includes a second inner ring and a second outer ring, the second inner ring is coaxially fixed to the end surface of the second bevel gear 102 away from the first bevel gear 101 , and the second outer ring is coaxially sleeved and rotated Outside the second inner ring, the outer wall of the second outer ring is fixed to the rotating cover 400 .

Further, a generator body is also arranged in the casing 300 of the wind power generator, and the main shaft 600 is connected with the input end of the generator to complete the power generation operation.

Further, the generator body is connected with the transmission shaft 201 . The transmission shaft 201 is connected to the input end of the generator body, and the generator can generate electricity through the transmission shaft 201 . Reduce the waste of energy and improve the efficiency of power generation.

The wind power generator further includes a reducer, the main shaft 600 is connected to the input end of the reducer, the output end of the reducer is connected to the input end of the generator, and the generator generates electricity.

Because the design of the present invention prevents the main shaft 600 from being directly connected to the reducer, the main shaft 600 can be connected to the reducer through a gear set. The gear set includes two mutually meshing spur gears, one of which is sleeved and fixed on the main shaft 600. In addition, another spur gear is fixed to the input end of the reducer. Transmission is achieved through a gear set.

In the present invention, the wind force detection component detects the wind force and wind speed. When the angle of the blade 500 is not suitable for the current condition, or the sensor 900 detects that the angle of the current blade 500 is not suitable for the current condition, the wind force detection component sends an electrical signal to the hydraulic cylinder 202. , the piston rod 2022 of the hydraulic cylinder 202 extends, and the piston rod 2022 extends into the corresponding socket 700. Under the action of the piston rod 2022, the transmission shaft 201 stops rotating, and at this time, the paddle 500 still drives a plurality of second cones The gear 102 rotates around the first bevel gear 101 . At this time, under the meshing of the second bevel gear 102 and the first bevel gear 101 , the second bevel gear 102 rotates and drives the corresponding paddle 500 to rotate. When the sensor 900 detects that the paddle 500 has reached or is about to reach the correct position, the sensor 900 sends an electrical signal to control the piston rod 2022 of the hydraulic cylinder 202 to retract. At this time, the transmission shaft 201 loses its position, and the angle adjustment of the paddle 500 is completed.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Under the conception of the present invention, the equivalent structural transformation made by the contents of the description and drawings of the present invention, or directly/indirectly applied to other related All technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A wind turbine, wherein the wind turbine comprises: The main body, the main body includes a casing, a rotating cover, a paddle and a main shaft, the paddles are arranged at intervals, and the plurality of the paddles are rotatably connected to the rotating cover at uniform intervals. The rotating cover is driven to rotate, the main shaft is fixed with the rotating cover, and the main shaft rotates in the casing; A pitch assembly, the pitch assembly includes a first bevel gear and a second bevel gear, the second bevel gear and the paddles have the same number and are connected in one-to-one correspondence; the first bevel gear and the first bevel gear The two bevel gears mesh with each other; A transmission assembly, the transmission assembly rotates in the housing, the transmission assembly includes a transmission shaft and a connecting piece, the transmission shaft is coaxially connected to the first bevel gear, and the connecting piece is used to connect the transmission The shaft is connected to the housing. 2 . The wind power generator according to claim 1 , wherein the main shaft of the wind power generator is tubular, the transmission shaft is rotatably arranged in the main shaft, and the connecting piece is arranged in the casing. 3 . in vivo. 3. The wind power generator according to claim 2, wherein each of the second bevel gears is provided with a rotating shaft, the outer peripheral wall of the transmission shaft is provided with a ring groove, and the rotating shaft is inserted and slid on the in the ring groove. 4. The wind power generator according to claim 2, wherein the connecting member is a hydraulic cylinder, the hydraulic cylinder comprises a cylinder block and a piston rod, the cylinder block is arranged on the housing, and the transmission The peripheral wall of the shaft is provided with an insertion hole for the piston rod to be inserted into. 5 . The wind power generator according to claim 4 , wherein a plurality of the sockets are arranged at intervals around the transmission shaft. 6 . 6. The wind turbine according to any one of claims 1 to 5, wherein the wind turbine further comprises a sensor, the sensor is used to detect the angle of the blade, and the sensor is connected to the The connector is electrically connected. 7 . The wind turbine according to claim 6 , wherein a plurality of the sensors are provided corresponding to the number of the blades and are arranged in a one-to-one correspondence, and each sensor detects the corresponding blade. 8 . The wind power generator according to any one of claims 1 to 5, characterized in that, the wind power generator further comprises a wind force detection component, and the wind force detection component is electrically connected to the connecting member. 9 . The wind power generator according to claim 1 , wherein the blade is connected to the second bevel gear, and the second bevel gear rotates on the second bevel gear through a second bearing. 10 . The rotating cover, the second bearing includes a second inner ring and a second outer ring, the second inner ring is coaxially fixed to the end face of the second bevel gear away from the first bevel gear, and the second outer ring is the same as the second bevel gear. The shaft is sleeved and rotated outside the second inner ring, and the outer wall of the second outer ring is fixed to the rotating cover. 10 . The wind power generator according to claim 1 , wherein a generator body is further arranged in the casing, and the generator body is connected with the transmission shaft. 11 .

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