阅读说明：本技术 线绳牵拉式减速装置、风力发电机的线绳牵拉式制动系统 (Rope traction type speed reducing device and rope traction type braking system of wind driven generator ) 是由 李和良 吴伟明 许凯杰 陈幸 郦先苗 于 2020-12-29 设计创作，主要内容包括：本发明涉及线绳牵拉式减速装置、风力发电机的线绳牵拉式制动系统。线绳牵拉式减速装置,包括：支撑座、传动齿轮、随动连接件及连接套环,传动齿轮转动设置在支撑座上,随动连接件与传动齿轮驱动连接；随动连接件具有连接柱,连接套环活动套接于连接柱；线绳牵拉式减速装置还包括：第一线绳、第二线绳、第一从动转轮、第二从动转轮、第一活塞及第二活塞；线绳牵拉式减速装置还包括：壳体、第一复位弹簧及第二复位弹簧。本发明公开的线绳牵拉式减速装置、风力发电机的线绳牵拉式制动系统,当风力过大时自动进入制动状态,从而对风力发电机进行减速,避免风力发电机超负荷运行,从而延长风力发电机的使用寿命。(The invention relates to a wire traction type speed reducing device and a wire traction type braking system of a wind driven generator. A wire pulling type reduction gear, comprising: the supporting seat, the transmission gear, the follow-up connecting piece and the connecting lantern ring, wherein the transmission gear is rotatably arranged on the supporting seat, and the follow-up connecting piece is in driving connection with the transmission gear; the follow-up connecting piece is provided with a connecting column, and the connecting lantern ring is movably sleeved on the connecting column; the wire pulling type reduction gear further comprises: the first rope, the second rope, the first driven rotating wheel, the second driven rotating wheel, the first piston and the second piston; the wire pulling type reduction gear further comprises: the device comprises a shell, a first return spring and a second return spring. The wire pulling type speed reducer and the wire pulling type braking system of the wind driven generator disclosed by the invention automatically enter a braking state when wind power is too large, so that the wind driven generator is decelerated, the wind driven generator is prevented from running in an overload manner, and the service life of the wind driven generator is prolonged.)

1. A rope pulling type speed reducer is characterized by comprising: the transmission gear is rotatably arranged on the supporting seat, and the follow-up connecting piece is in driving connection with the transmission gear; the follow-up connecting piece is provided with a connecting column, and the connecting lantern ring is movably sleeved on the connecting column;

the wire pulling type deceleration device further comprises: the first rope, the second rope, the first driven rotating wheel, the second driven rotating wheel, the first piston and the second piston are respectively and rotatably arranged on the supporting seat; one end of the first rope is connected with one side of the connecting lantern ring, and the other end of the first rope is connected with the first piston after passing through the first driven rotating wheel in a winding mode; one end of the second rope is connected with the other side of the connecting lantern ring, and the other end of the second rope is connected with the second piston after passing through the second driven rotating wheel in a winding mode;

the wire pulling type deceleration device further comprises: the gas valve comprises a shell, a first return spring and a second return spring, wherein a first gas cavity and a second gas cavity are formed in the shell; the first gas cavity is provided with a first one-way air inlet valve and a first one-way air outlet valve, and the second gas cavity is provided with a second one-way air inlet valve and a second one-way air outlet valve; the first reset is accommodated in the first gas cavity, one end of the first spring is connected with the first piston, and the other end of the first spring is connected with the inner wall of the first gas cavity; the second spring is accommodated in the second gas cavity, one end of the second return spring is connected with the second piston, and the other end of the second return spring is connected with the inner wall of the second gas cavity.

2. A rope pulling deceleration device according to claim 1, further comprising a first sealing sleeve fitted over an end of the first rope near the first piston.

3. A rope pulling deceleration device according to claim 2, characterized in that the first sealing sleeve extends from the first gas chamber to outside the housing.

4. A rope pulling deceleration device according to claim 1, further comprising a second sealing sleeve fitted over an end of the second rope near the second piston.

5. A rope pulling deceleration device according to claim 4, characterized in that the second sealed sleeve extends from the second gas chamber to outside the housing.

6. A rope pulling deceleration device according to claim 1, wherein the follower link is provided at a middle portion of the support base, and the first driven pulley and the second driven pulley are provided at both ends of the support base, respectively.

7. The rope-pulling deceleration device according to claim 6, wherein the first gas chamber and the second gas chamber are arranged in parallel.

8. A wire-pulling type brake system for a wind power generator, comprising the wire-pulling type deceleration device according to any one of claims 1 to 7;

the rope pulling type braking system of the wind driven generator further comprises a wind power induction driving device, and the rotary uplifting type speed reducing device is in driving connection with the wind power induction driving device.

Technical Field

The invention relates to the technical field of wind driven generators, in particular to a wire rope traction type speed reducing device and a wire rope traction type braking system of a wind driven generator.

Background

Wind power generation is a process of converting wind energy into mechanical energy and then converting the mechanical energy into electric energy. The process does not need fuel, does not radiate, does not pollute the air and the environment, and therefore, the wind energy is clean energy.

However, the wind power input to the wind power generation apparatus is not artificially set, but is a magnitude of natural wind depending on the working environment in which the wind power generation apparatus is located, that is, a magnitude of wind power driving the wind power generation apparatus is not controllable. At present, the wind power generators on the market are easy to run under overload due to overlarge wind power, and finally, the wind power generation equipment is overloaded and burnt out.

Of course, when the wind power of the wind power generation equipment is too large, the protection function is started to protect the wind power generation equipment and prevent the wind power generation equipment from being burnt out due to overload operation. For example, in the invention patent with publication number CN104500337A, when the wind force is too large, the worker needs to manually operate the handle to start the protection mechanism to realize the protection function. Through a manual protection mechanism, on one hand, the wind power needs to be monitored in real time, and the labor cost is high; on the other hand, since the worker knows that the wind force is too large, a certain time is required for the worker to manually complete the protection operation of the protection mechanism, and in this time period, the wind power generation equipment is in an overload state. Therefore, the wind power generation equipment inevitably has an overload state, and thus the protection effect of the wind power generation equipment is not ideal.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a wire rope traction type speed reducing device and a wire rope traction type braking system of a wind driven generator.

The purpose of the invention is realized by the following technical scheme:

a cord-pulling type reduction gear, comprising: the transmission gear is rotatably arranged on the supporting seat, and the follow-up connecting piece is in driving connection with the transmission gear; the follow-up connecting piece is provided with a connecting column, and the connecting lantern ring is movably sleeved on the connecting column;

the wire pulling type deceleration device further comprises: the first rope, the second rope, the first driven rotating wheel, the second driven rotating wheel, the first piston and the second piston are respectively and rotatably arranged on the supporting seat; one end of the first rope is connected with one side of the connecting lantern ring, and the other end of the first rope is connected with the first piston after passing through the first driven rotating wheel in a winding mode; one end of the second rope is connected with the other side of the connecting lantern ring, and the other end of the second rope is connected with the second piston after passing through the second driven rotating wheel in a winding mode;

the wire pulling type deceleration device further comprises: the gas valve comprises a shell, a first return spring and a second return spring, wherein a first gas cavity and a second gas cavity are formed in the shell; the first gas cavity is provided with a first one-way air inlet valve and a first one-way air outlet valve, and the second gas cavity is provided with a second one-way air inlet valve and a second one-way air outlet valve; the first reset is accommodated in the first gas cavity, one end of the first reset spring is connected with the first piston, and the other end of the first reset spring is connected with the inner wall of the first gas cavity; the second return spring is accommodated in the second gas cavity, one end of the second return spring is connected with the second piston, and the other end of the second return spring is connected with the inner wall of the second gas cavity.

In one embodiment, the rope pulling type speed reducer further comprises a first sealing sleeve sleeved at one end of the first rope close to the first piston.

In one embodiment, the first sealing sleeve extends from the first gas chamber to outside the housing.

In one embodiment, the rope pulling type speed reducer further comprises a second sealing sleeve sleeved at one end of the second rope close to the second piston.

In one embodiment, the second sealing sleeve extends from the second gas cavity to outside the housing.

In one embodiment, the following connection member is disposed at a middle portion of the supporting seat, and the first driven pulley and the second driven pulley are disposed at two ends of the supporting seat respectively.

In one embodiment, the first gas chamber and the second gas chamber are arranged in parallel.

The invention also discloses a wire rope traction type braking system of the wind driven generator, which comprises the wire rope traction type speed reducing device;

the rope pulling type braking system of the wind driven generator further comprises a wind power induction driving device, and the rotary uplifting type speed reducing device is in driving connection with the wind power induction driving device.

The invention also discloses a line traction type speed reducing device and a line traction type braking system of the wind driven generator, which automatically enter a braking state when wind power is too large, so that the wind driven generator is decelerated, the overload operation of the wind driven generator is avoided, and the service life of the wind driven generator is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a wire rope pulling type reduction gear of the present invention;

fig. 2 is a partial cross-sectional view of the wire pulling type reduction gear shown in fig. 1;

fig. 3 is a state switching diagram of the wire pulling type speed reducer shown in fig. 2;

FIG. 4 is a schematic structural view of a wire-pulling type braking system of a wind turbine according to the present invention;

FIG. 5 is another schematic view of the wire-pull brake system of the wind turbine shown in FIG. 4;

fig. 6 is a schematic view of the wind sensing assembly and the brake release assembly shown in fig. 5.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the present invention discloses a rope pulling type reduction gear 10, including: the device comprises a supporting seat 100, a transmission gear 200, a follow-up connecting piece 300 and a connecting sleeve ring 400, wherein the transmission gear 200 is rotatably arranged on the supporting seat 100, and the follow-up connecting piece 300 is in driving connection with the transmission gear 200; the follow-up connector 300 has a connection column 310, and the connection collar 400 is movably sleeved on the connection column 310.

As shown in fig. 2 and 3, specifically, the wire-pulling type reduction gear device 10 further includes: the first cord 500, the second cord 600, the first driven pulley 700, the second driven pulley 800, the first piston 110 and the second piston 120, and the first driven pulley 700 and the second driven pulley 800 are respectively rotatably disposed on the support base 100. One end of the first string 500 is connected to one side of the connection collar 400, and the other end of the first string 500 is connected to the first piston 110 after passing around the first driven pulley 700. One end of the second string 600 is connected to the other side of the connection sleeve 400, and the other end of the second string 600 is connected to the second piston 120 after passing around the second driven pulley 800.

As shown in fig. 2 and 3, specifically, the wire-pulling type reduction gear device 10 further includes: the gas spring comprises a shell 130, a first return spring 140 and a second return spring 150, wherein a first gas cavity 160 and a second gas cavity 170 are arranged in the shell 130. The first gas chamber 160 is provided with a first one-way intake valve 161 and a first one-way exhaust valve 162, and the second gas chamber 170 is provided with a second one-way intake valve 171 and a second one-way exhaust valve 172. The first return is received in the first gas chamber 160, and one end of the first return spring 140 is connected to the first piston 110 and the other end is connected to the inner wall of the first gas chamber 160. The second return spring 150 is received in the second gas chamber 170, and one end of the second return spring 150 is connected to the second piston 120 and the other end is connected to an inner wall of the second gas chamber 170. In this embodiment, the first one-way vent valve 162 circumscribes a first air reservoir (not shown) and the second one-way vent valve 172 circumscribes a second air reservoir (not shown).

As shown in fig. 3, in particular, the rope pulling type deceleration device 10 further includes a first sealing sleeve 180, and the first sealing sleeve 180 is sleeved on one end of the first rope 500 close to the first piston 110. In a preferred embodiment, a first sealing sleeve 180 extends from the first gas chamber 160 to the exterior of the housing 130.

As shown in fig. 3, in particular, the rope pulling type deceleration device 10 further includes a second sealing sleeve 190, and the second sealing sleeve 190 is sleeved on one end of the second rope 600 close to the second piston 120. In a preferred embodiment, a second seal bushing 190 extends from the second gas chamber 170 to the exterior of the housing 130.

As shown in fig. 2, specifically, the follower link 300 is disposed at the middle of the support base 100, and the first driven pulley 700 and the second driven pulley 800 are disposed at two ends of the support base 100, respectively.

Specifically, the first gas chamber 160 and the second gas chamber 170 are disposed in parallel.

The operation of the wire-pulling type reduction gear 10 will be described below (see fig. 1, 2, and 3):

when the transmission gear 200 rotates, the follow-up connecting piece 300 is driven to rotate together, and the follow-up connecting piece 300 drives the connecting lantern ring 400 to do circular motion; when the connecting sleeve ring 400 moves away from the first driven runner 700, the connecting sleeve ring 400 continuously pulls the first string 500, so that the first string 500 pulls the first piston 110 to move towards the direction close to the first one-way outlet valve 162; in the process, the first piston 110 continuously presses the gas in the first gas chamber 160, so that the gas in the first gas chamber 160 is discharged to the first gas storage cylinder through the first one-way gas outlet valve 162; meanwhile, the first return spring 140 continuously extends and accumulates elastic potential energy under the tensile force of the first piston 110; it should be further noted that, during the process that the connection collar 400 moves away from the first driven pulley 700, the second piston 120 moves away from the second one-way outlet valve 172 under the elastic restoring force of the second return spring 150; and, in this process, the gas outside the housing 130 is continuously introduced into the second gas chamber 170 through the second one-way intake valve 171;

when the connecting sleeve ring 400 moves away from the second driven runner 800, the connecting sleeve ring 400 continuously pulls the second line 600, so that the second line 600 pulls the second piston 120 to move towards the direction close to the second one-way air outlet valve 172; in the process, the second piston 120 continuously presses the gas in the second gas cavity 170, so that the gas in the second gas cavity 170 is discharged to the second gas storage cylinder through the second one-way gas outlet valve 172; meanwhile, the second return spring 150 continuously extends and accumulates elastic potential energy under the tensile force of the second piston 120; it should be further noted that, during the process that the connection collar 400 moves away from the second driven pulley 800, the first piston 110 moves away from the first one-way outlet valve 162 under the elastic restoring force of the first return spring 140; and, in this process, the gas outside the housing 130 continuously enters the first gas chamber 160 through the first one-way intake valve 161;

in the rope pulling type speed reducer 10 provided by the invention, in the process that the connecting lantern ring 400 continuously makes circular motion, the connecting lantern ring 400 repeatedly and alternately performs air suction and air exhaust on the first gas cavity 160 and the second gas cavity 170 through the first rope 500, the first piston 110, the second rope 600 and the second piston 120; thereby realizing continuous and stable deceleration;

it should be noted that the first sealing sleeve 180 and the second sealing sleeve 190 respectively move along with the first cord 500 and the second cord 600; the first and second sealing sleeves 180, 190 increase the sealing of the first and second gas chambers 160, 170; on the other hand, the first piston 110 and the second piston 120 are moved more stably, and the first piston 110 and the second piston 120 are prevented from deflecting during the reciprocating movement to cause air leakage, so that the stability of the wire rope pulling type speed reducing device 10 is better.

As shown in fig. 4, the present invention further discloses a rope pulling type braking system 20 of a wind power generator, which comprises a rope pulling type speed reducer 10 and a wind power induction driving device 30, wherein the rope pulling type speed reducer 10 is in driving connection with the wind power induction driving device 30.

As shown in fig. 4, specifically, the wind induction driving apparatus 30 includes: the rope traction type speed reducer comprises a wind sensing assembly 40, a braking unlocking assembly 50 and a wind braking assembly 60, wherein the wind sensing assembly 40 is connected with the braking unlocking assembly 50, the braking unlocking assembly 50 is in contact with or separated from the wind braking assembly 60, and the rope traction type speed reducer 10 is in driving connection with the wind braking assembly 60.

As shown in fig. 5, in particular, the wind induction assembly 40 includes: a sail (not shown), a free link 401, a guide base 402, a free slider 403 and a transmission return spring 404; the sail is connected with a free slide block 403 through a free connecting rod 401; a free slider 403 is slidably disposed on the guide base 402; one end of the transmission return spring 404 is connected to the free slider 403, and the other end is connected to the guide base 402.

As shown in fig. 5 and fig. 6, specifically, the braking unlocking assembly 50 includes a supporting link 501 and a V-shaped transmission member 502, and the V-shaped transmission member 502 is rotatably sleeved on the supporting link 501; the V-shaped transmission member 502 has a displacement sensing end 503, the free sliding block 403 has a stepped guiding groove 405, and the displacement sensing end 503 is slidably engaged with the stepped guiding groove 405. In a preferred embodiment, the displacement-sensing end 503 is provided with a ball head 504, and the ball head 504 is slidably engaged in the stepped guide groove 405. This allows the displacement sensing end 503 to smoothly engage with the stepped guide groove 405. In addition, the ball head 504 is slidably engaged in the stepped guide groove 405, so that the ball head 504 is limited on one hand, and the ball head 504 is prevented from being disengaged from the stepped guide groove 405; on the other hand, the state of the V-shaped transmission member 502 is indirectly controlled by controlling the displacement sensing end 503, so that the locking or the separation of the V-shaped transmission member 502 and the brake unlocking member 603 is realized, thereby controlling whether the brake system 20 enters the braking state.

As shown in fig. 4 and 5, specifically, the wind brake assembly 60 includes: the brake ratchet 601, the brake gear 602, the brake unlocking piece 603 and the brake connecting rod 604, the brake ratchet 601 is in driving connection with the brake connecting rod 604, the brake gear 602 is movably sleeved on the brake connecting rod 604, and the brake gear 602 is meshed with the transmission gear 200; the brake unlocking piece 603 is rotatably arranged on the brake gear 602, the V-shaped transmission piece 502 is also provided with a brake locking end 505, and the brake unlocking piece 603 is locked with the brake locking end 505 or the brake ratchet 601.

As shown in fig. 5, in particular, the wind power brake assembly 60 further includes a limiting elastic sheet 605, and the limiting elastic sheet 605 is disposed on the brake gear 602 and abuts against the brake unlocking piece 603, so that the brake unlocking piece 603 has a tendency to be locked with the brake ratchet 601. It should be noted that the limiting elastic sheet 605 abuts against the braking unlocking piece 603, so that the braking unlocking piece 603 has a tendency of locking with the braking ratchet 601; that is, the limit elastic sheet 605 provides a supporting force for the braking unlocking piece 603, so that the gravity of the braking unlocking piece 603 is overcome, the braking unlocking piece 603 is stably locked with the braking ratchet 601, and unhooking is prevented; thereby ensuring stability of the brake system 20 and providing reliable brake protection for the wind turbine.

Specifically, as shown in fig. 5, the brake release member 603 has a lock engaging end 606 and a linkage lock end 607, the lock engaging end 606 being locked to or separated from the brake lock end 505; the linkage locking end 607 is locked or separated with the brake ratchet 601.

As shown in fig. 5, in particular, the linkage locking end 607 has a hook 608, and the hook 608 is locked with or separated from a ratchet groove 609 of the braking ratchet 601. Through the structural cooperation of the hook 608 and the ratchet groove 609, on one hand, the linkage locking end 607 and the braking ratchet 601 are ensured to be easily locked; on the other hand, the linkage locking end 607 is easy to separate from the braking ratchet 601; thereby ensuring reliability and stability of the brake system 20.

As shown in fig. 6, in detail, the guide base 402 is provided with a linear guide groove 406, and the free slider 403 is slidably disposed along the linear guide groove 406.

When the cord pulling type braking system 20 of the wind driven generator is applied to the wind driven generator, the braking connecting rod 604 is connected with a transmission shaft of the wind driven generator. It should be particularly noted that the fan blade is connected to the wind driven generator through the brake link 604, that is, the fan blade drives the transmission shaft of the wind driven generator to rotate through the brake link 604, so as to realize the power generation of the wind driven generator.

The invention discloses a cord traction type braking system 20 of a wind driven generator, which is applied to the technical field of wind driven generators; when the wind power around the wind driven generator exceeds a preset limit value, the wind driven generator is braked, so that the wind driven generator is prevented from being overloaded to run and shorten the service life or burn out.

The operation of the rope-pulling type braking system 20 of the wind turbine will be explained (please refer to fig. 4, 5 and 6):

firstly, setting an overload limit value aiming at the load capacity of the wind driven generator, and when the wind power does not exceed the overload limit value, the braking system 20 is in a non-braking state, and the wind driven generator normally runs to generate electricity; when the wind power exceeds the overload limit value, the braking system 20 enters a braking state, and the braking system 20 decelerates a transmission shaft of the wind driven generator; the generator is prevented from being burnt out due to the over-high rotating speed of the transmission shaft;

when the wind power does not exceed the preset overload limit value, the braking system 20 is in a non-braking state; at this time, the locking end 505 of the V-shaped transmission member 502 hooks the locking mating end 606 of the locking unlocking member 603, so that the linkage locking end 607 of the locking unlocking member 603 is separated from the ratchet groove 609 of the locking ratchet 601; this allows no linkage between the brake ratchet 601 and the brake gear 602, i.e. the brake gear 602 remains stationary while the brake ratchet 601 follows the brake link 604;

with the increase of wind power, when the sail moves towards the direction close to the transmission return spring 404, the sail drives the free slide block 403 to move towards the direction close to the transmission return spring 404 through the free connecting rod 401, the transmission return spring 404 is continuously compressed, and the stepped guide groove 405 also continuously moves, so that the position of the ball head 504 in the stepped guide groove 405 is also continuously changed; of course, in this process, the locking latching end 505 of the V-shaped transmission member 502 still hooks the latching mating end 606 of the locking releasing member 603, so that the linkage latching end 607 of the locking releasing member 603 is kept separated from the ratchet groove 609 of the locking ratchet 601;

when the wind increases beyond the overload limit, the braking system 20 enters a braking state from a non-braking state; the specific process is as follows: with the increase of wind power, the sail further drives the free slide block 403 to move towards the direction close to the transmission return spring 404 through the free connecting rod 401 under the action of the wind power; in the process, the transmission return spring 404 is further compressed, and one end of the stepped guide groove 405 far away from the transmission return spring 404 further moves towards the direction close to the ball head 504, and finally the ball head 504 is abutted against one end of the stepped guide groove 405 far away from the transmission return spring 404; it should be noted that, in the process, the V-shaped transmission member 502 rotates along the support link 501 by an angle, and the locking end 505 of the V-shaped transmission member 502 is separated from the locking end 606 of the locking and unlocking member 603;

after the brake locking end 505 is separated from the locking end 606, the brake unlocking piece 603 is linked with the locking end 607 to approach the brake ratchet 601 under the elastic action of the limiting elastic sheet 605 and finally locked with the ratchet groove 609 of the brake ratchet 601; after the braking unlocking piece 603 is locked with the braking ratchet 601, linkage is formed between the braking gear 602 and the braking ratchet 601; this causes the brake ratchet 601 to rotate with the brake link 604, which drives the brake gear 602 to rotate; when the brake gear 602 rotates, the transmission gear 200 is driven to rotate, so that the wire rope traction type speed reducer 10 is driven to operate, and the speed of the transmission shaft is reduced; the phenomenon that the wind power generator runs in an overload mode due to the fact that the rotating speed of a transmission shaft is too high due to too large wind power is avoided;

the rope traction type braking system 20 of the wind driven generator decelerates a transmission shaft of the wind driven generator when wind power is too large; the phenomenon that the wind power generator runs in an overload mode due to the fact that the rotating speed of a transmission shaft is too high due to too large wind power is avoided; moreover, the braking system 20 of the invention can sense the magnitude of the wind power in real time, and instantly enters a braking state to perform deceleration processing when the wind power exceeds a preset overload limit value, so that the braking is rapid and timely while automatic braking is realized;

when the wind power decreases below a preset overload limit value, the braking system 20 returns to a non-braking state and no longer brakes the wind turbine; the specific process is as follows: when the wind power is reduced, the wind power borne by the sail is reduced; at this time, the free slide 403 is reset in a direction away from the transmission return spring 404 under the elastic force of the transmission return spring 404; at this time, one end of the stepped guide slot 405 close to the transmission return spring 404 reaches the ball head 504 of the displacement sensing end 503 and is matched with the ball head 504; at this time, the V-shaped transmission member 502 is rotated and reset, and the braking locking end 505 of the V-shaped transmission member 502 hooks the locking end 606 of the braking unlocking member 603 again, so that the linkage locking end 607 of the braking unlocking member 603 is separated from the ratchet groove 609 of the braking ratchet 601;

the rope traction type braking system 20 of the wind driven generator can be instantly switched from a braking state to a non-braking state when the wind power is reduced from exceeding a preset overload limit value to being lower than the preset overload limit value, so that the wind driven generator can generate power stably and continuously in real time;

in addition, the wire rope traction type braking system 20 of the wind driven generator can be repeatedly switched between a braking state and a non-braking state along with the wind power when the wind speed is repeatedly shifted near a preset overload limit value; therefore, the wind driven generator is reliably protected in real time.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.