Brake device of wind driven generator

Abstract

The braking device of the wind driven generator comprises a machine box with the two sides fixedly connected with shaft sleeves, rotating shafts are rotationally inserted into the shaft sleeves in a penetrating mode, fan blades are fixedly connected to the ends of the rotating shafts, a braking mechanism is fixed to the top in the machine box through bolts, and an auxiliary braking assembly is rotationally connected to the front face of the braking mechanism. A hydraulic cylinder is fixedly connected to the outer wall of the top of the machine box, the output end of the hydraulic cylinder is connected with the driving end of the braking mechanism, the braking mechanism comprises a connecting shaft, a front plate, a guide connecting plate, a fixing part, a rear plate, a braking ring, a first guide hole, a limiting strip, a second guide hole, a rotating shaft, a guide shaft, a U-shaped plate, a connecting plate, a sector tooth and a rack plate, and the fixing part is fixedly connected to the inner wall of the top of the machine box. Effective braking of the rotating shaft of the fan blade is promoted, the braking efficiency and quality are improved, the problems that in the prior art, a braking device is inconvenient to install and low in maintenance efficiency are solved, and the assembling and disassembling efficiency of the braking mechanism is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of braking, and in particular to a braking device for a wind turbine. Background Art

[0002] Wind turbines, as a key component of renewable energy, have been widely used in recent years. With the continuous development of wind power technology, the scale and power of wind turbines have also continued to increase. In this context, the safety and reliability of wind turbines are particularly important, and the braking system, as a key component of wind turbines, plays a vital role. The braking system of a wind turbine is mainly used to control the operating status of the wind turbine in strong winds or fault conditions to prevent damage to the equipment and the surrounding environment. During the operation of the wind turbine, the braking system not only needs to function in extreme weather conditions, but also must ensure the equipment remains stationary during routine maintenance and overhaul. Therefore, the design and reliability of the braking system are directly related to the overall safety and power generation efficiency of the wind turbine.

[0003] After searching, the invention with Chinese patent publication number CN219795446U discloses a braking device for a wind turbine. The base of the shell is provided with a drive motor, and the shell base is rotatably connected to a fan shaft. Two sets of wear-resistant sleeves are spaced apart on the fan shaft. The fan shaft is driven by the drive motor. Two sets of support plates are fixedly connected to the shell base at intervals. Both sets of support plates are provided with sliding grooves. Two sets of movable plates are slidably connected in the sliding grooves. The two sets of movable plates are driven by a power device. Two sets of damping rods are fixedly connected to the two sets of movable plates at intervals. The protruding ends of the two sets of damping rods are fixedly connected to brake plates corresponding to the wear-resistant sleeves. A buffer spring is provided between the brake plate and the movable plate. The braking device of a wind turbine in the above invention has the following deficiencies:

[0004] Although the above device can effectively brake the fan blade rotating shaft, the two sets of braking structures occupy a large installation area, which is not only inconvenient to install the overall structure, but also has low efficiency in subsequent maintenance. Therefore, a braking device for a wind turbine is urgently needed. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a braking device for a wind turbine.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A braking device for a wind turbine comprises a chassis with shaft sleeves fixedly connected on both sides, a rotating shaft rotatably inserted into the shaft sleeve, a fan blade fixedly connected to the end of the rotating shaft, and a braking mechanism fixed to the inner top of the chassis by bolts, an auxiliary braking assembly rotatably connected to the front of the braking mechanism, a hydraulic cylinder fixedly connected to the top outer wall of the chassis, and an output end of the hydraulic cylinder connected to the driving end of the braking mechanism.

[0008] As a further solution of the present invention: the braking mechanism includes a connecting shaft, a front plate, a guide plate, a fixing part, a rear plate, a brake ring, a guide hole one, a limit bar, a guide hole two, a rotating shaft, a guide shaft, a U-shaped plate, a connecting plate, a fan-shaped tooth and a rack plate, and the fixing part is fixedly connected to the top inner wall of the chassis, the rear plate is fixedly connected to the bottom of the fixing part, the front plate is fixedly connected to the front side of the rear plate, and the guide plate is fixedly connected to the piston end of the hydraulic cylinder.

[0009] As a further solution of the present invention: the guide plate and the top of the rear plate slide vertically to each other, the U-shaped plate is fixedly connected to both sides of the guide plate, the connecting plate is rotatably connected to the inner side of the U end of the U-shaped plate, the sector teeth are rotatably connected to the other end of the connecting plate through the guide shaft, and the rotating shaft is fixedly connected to the two inner sides of the rear plate, the sector teeth and the rotating shaft form a rotating connection, and the connecting shaft is fixedly connected to the end of the rotating shaft.

[0010] As a further solution of the present invention: the guide hole 2 is opened on both sides of the lower front side of the front plate, and the guide hole 1 is opened on one side of the bottom of the rear plate, and the guide hole 1 and the guide hole 2 are respectively slidably connected to the limit bars, and the limit bars are fixed on both sides of the rack plate.

[0011] As a further solution of the present invention: the sector teeth and the rack plate are meshed with each other, the brake ring is fixedly connected to the bottom of the rack plate, and the two brake rings are wrapped around both sides of the circumference of the rotating shaft.

[0012] As a further solution of the present invention: the auxiliary brake assembly includes an auxiliary brake plate, a rocker arm, a connecting hole and an arc hole, and the connecting holes are opened on both sides of the front side of the front plate, the arc hole is opened on the side of the front plate close to the top of the connecting hole, and the top end of the rocker arm is fixedly connected to the circumference of the guide shaft.

[0013] As a further solution of the present invention: the top end of the rocker arm forms a sliding fit with the arc hole, the auxiliary brake plate is fixedly connected to the bottom side of the rocker arm, and the connecting shaft passes through the connecting hole and is fixedly connected to the middle section of the rocker arm.

[0014] Compared with the prior art, the present invention provides a braking device for a wind turbine generator, which has the following beneficial effects:

[0015] 1. This braking device of a wind turbine, by providing a braking mechanism, not only promotes effective braking of the rotating shaft of the fan blade, but also improves the braking efficiency and quality. Moreover, by fitting the front plate and the fixing parts together and installing them on the top inner side of the chassis through the fixing parts, it solves the problems of inconvenient installation and low maintenance efficiency of the braking device in the prior art, and improves the loading and unloading efficiency of the braking mechanism.

[0016] 2. This kind of braking device of the wind turbine is provided with an auxiliary braking assembly. When the U-shaped plate drives the sector teeth to rotate, the guide shaft drives the top end of the rocker arm to make an arc motion in the arc hole, and the rocker arm rotates around the connecting shaft, driving the auxiliary braking plate at the bottom of the rocker arm to move inward to brake the rotating shaft, thereby playing an auxiliary braking role and improving the braking effect on the rotating shaft.

[0017] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The present invention has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the chassis in the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the braking mechanism of the present invention;

[0021] Figure 4 Schematic diagram of the explosion structure of the braking mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the partial structure of the braking mechanism in the present invention.

[0023] In the figure: 1. fan blade; 2. chassis; 3. bushing; 4. rotating shaft; 5. hydraulic cylinder; 6. brake mechanism; 7. auxiliary brake assembly; 601. connecting shaft; 602. front plate; 603. guide plate; 604. fixing piece; 605. rear plate; 606. brake ring; 607. guide hole 1; 608. limit strip; 609. guide hole 2; 610. rotating shaft; 611. guide shaft; 612. U-shaped plate; 613. connecting plate; 614. sector teeth; 615. rack plate; 701. auxiliary brake plate; 702. rocker arm; 703. connecting hole; 704. arc hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] A braking device for a wind turbine generator, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a chassis 2, wherein the two sides of the chassis 2 are respectively fixedly connected with shaft sleeves 3, and a rotating shaft 4 is rotatably inserted in the shaft sleeve 3, and the end of the rotating shaft 4 is fixedly connected with a fan blade 1, and the inner top of the chassis 2 is fixed with a braking mechanism 6 by bolts, and the front of the braking mechanism 6 is rotatably connected with an auxiliary braking assembly 7, and the top outer wall of the chassis 2 is connected with a hydraulic cylinder 5 by bolts, and the output end of the hydraulic cylinder 5 is connected to the driving end of the braking mechanism 6.

[0027] In order to promote the effective braking of the rotating shaft 4 of the fan blade 1, as Figure 3 、 Figure 4 and Figure 5 As shown, the brake mechanism 6 includes a connecting shaft 601, a front plate 602, a guide plate 603, a fixing member 604, a rear plate 605, a brake ring 606, a guide hole 1 607, a limit bar 608, a guide hole 2 609, a rotating shaft 610, a guide shaft 611, a U-shaped plate 612, a connecting plate 613, a sector tooth 614 and a rack plate 615, and the fixing member 604 is fixed to the top inner wall of the chassis 2 by bolts, the rear plate 605 is fixedly connected to the bottom of the fixing member 604, the front plate 602 is connected to the front side of the rear plate 605 by bolts, and the guide plate 603 is connected to the piston end of the hydraulic cylinder 5 by a thread;

[0028] The guide plate 603 and the top of the rear plate 605 slide perpendicularly to each other. The U-shaped plate 612 is fixedly connected to both sides of the guide plate 603. The connecting plate 613 is rotatably connected to the inner side of the U end of the U-shaped plate 612. The sector teeth 614 are rotatably connected to the other end of the connecting plate 613 via the guide shaft 611. The rotating shaft 610 is fixedly connected to both inner sides of the rear plate 605. The sector teeth 614 are rotatably connected to the rotating shaft 610. The connecting shaft 601 is connected to the end of the rotating shaft 610 via a thread.

[0029] The second guide hole 609 is provided on both sides of the lower front side of the front plate 602, and the first guide hole 607 is provided on one side of the bottom of the rear plate 605. The first guide hole 607 and the second guide hole 609 are respectively slidably connected to the limit bars 608, and the limit bars 608 are fixed to both sides of the rack plate 615. The sector teeth 614 are engaged with the rack plate 615. The brake ring 606 is fixedly connected to the bottom of the rack plate 615, and the two brake rings 606 are wrapped around both sides of the circumference of the rotating shaft 4.

[0030] During operation, the hydraulic cylinder 5 is activated to drive the guide plate 603 to slide downward on the top of the rear plate 605. The guide plate 603 pulls the U-shaped plate 612 downward. The U-shaped plate 612 pulls the sector teeth 614 to rotate a certain angle around the rotation axis 610 through the connecting plate 613. The rotating sector teeth 614 drive the two rack plates 615 to move horizontally inward. During this period, the limit bars 608 located on both sides of the rack plates 615 slide within the limit bars 608 and the second guide hole 609.

[0031] At the same time, the brake ring 606 located at the bottom of the rack plate 615 approaches the two sides of the circumference of the rotating shaft 4, gradually locking the rotating shaft 4 to complete the braking. This not only promotes the effective braking of the rotating shaft 4 of the fan blade 1, but also improves the braking efficiency and quality. The front plate 602 and the fixing part 604 are fitted together and installed on the top inner side of the chassis 2 through the fixing part 604, which solves the problems of inconvenient installation and low maintenance efficiency of the braking device in the prior art, and improves the loading and unloading efficiency of the braking mechanism 6.

[0032] Please continue reading Figure 4 In order to improve the braking effect on the rotating shaft 4, the auxiliary brake assembly 7 includes an auxiliary brake plate 701, a rocker arm 702, a connecting hole 703 and an arc-shaped hole 704. The connecting holes 703 are provided on both sides of the front surface of the front plate 602, and the arc-shaped hole 704 is provided on the side of the front plate 602 above the connecting holes 703. The top end of the rocker arm 702 is connected to the circumference of the guide shaft 611 by a thread.

[0033] The top of the swing rod 702 forms a sliding fit with the arc-shaped hole 704, the auxiliary brake plate 701 is fixedly connected to one side of the bottom of the swing rod 702, and the connecting shaft 601 passes through the connecting hole 703 and is fixedly connected to the middle section of the swing rod 702;

[0034] When the U-shaped plate 612 drives the sector teeth 614 to rotate, the guide shaft 611 drives the top end of the rocker arm 702 to make an arc motion in the arc hole 704, and the rocker arm 702 rotates around the connecting shaft 601, driving the auxiliary brake plate 701 at the bottom of the rocker arm 702 to move inward to brake the rotating shaft 4, thereby playing an auxiliary braking role and improving the braking effect on the rotating shaft 4.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A braking device for a wind turbine, comprising a chassis (2) with shaft sleeves (3) fixedly connected on both sides, characterized in that: A rotating shaft (4) is rotatably inserted into the shaft sleeve (3), the end of the rotating shaft (4) is fixedly connected to the fan blade (1), and a braking mechanism (6) is fixed to the inner top of the chassis (2) by bolts, the front of the braking mechanism (6) is rotatably connected to the auxiliary braking assembly (7), and a hydraulic cylinder (5) is fixedly connected to the top outer wall of the chassis (2), and the output end of the hydraulic cylinder (5) is connected to the driving end of the braking mechanism (6).

2. A braking device for a wind turbine according to claim 1, characterized in that: The braking mechanism (6) comprises a connecting shaft (601), a front plate (602), a guide plate (603), a fixing member (604), a rear plate (605), a brake ring (606), a first guide hole (607), a limit bar (608), a second guide hole (609), a rotating shaft (610), a guide shaft (611), a U-shaped plate (612), a connecting plate (613), a sector tooth (614) and a rack plate (615), wherein the fixing member (604) is fixedly connected to the top inner wall of the chassis (2), the rear plate (605) is fixedly connected to the bottom of the fixing member (604), the front plate (602) is fixedly connected to the front side of the rear plate (605), and the guide plate (603) is fixedly connected to the piston end of the hydraulic cylinder (5).

3. A braking device for a wind turbine according to claim 2, characterized in that: The guide plate (603) and the top of the rear plate (605) slide perpendicularly to each other, the U-shaped plate (612) is fixedly connected to both sides of the guide plate (603), the connecting plate (613) is rotatably connected to the inner side of the U end of the U-shaped plate (612), the sector teeth (614) are rotatably connected to the other end of the connecting plate (613) through the guide shaft (611), and the rotating shaft (610) is fixedly connected to both inner sides of the rear plate (605), the sector teeth (614) and the rotating shaft (610) form a rotatable connection, and the connecting shaft (601) is fixedly connected to the end of the rotating shaft (610).

4. The braking device of a wind turbine according to claim 2, characterized in that: The second guide hole (609) is opened on both sides of the lower front side of the front plate (602), and the first guide hole (607) is opened on one side of the bottom of the rear plate (605). The first guide hole (607) and the second guide hole (609) are respectively slidably connected to the limit bars (608), and the limit bars (608) are fixed on both sides of the rack plate (615).

5. The braking device of a wind turbine according to claim 2, characterized in that: The sector teeth (614) and the rack plate (615) are meshed with each other, the brake ring (606) is fixedly connected to the bottom of the rack plate (615), and the two brake rings (606) are wrapped around both sides of the circumference of the rotating shaft (4).

6. The braking device of a wind turbine according to claim 1, characterized in that: The auxiliary brake assembly (7) comprises an auxiliary brake plate (701), a rocker arm (702), a connecting hole (703) and an arc-shaped hole (704), wherein the connecting hole (703) is provided on both sides of the front surface of the front plate (602), the arc-shaped hole (704) is provided on one side of the front plate (602) above the connecting hole (703), and the top end of the rocker arm (702) is fixedly connected to the circumference of the guide shaft (611).

7. The braking device of a wind turbine according to claim 6, characterized in that: The top end of the swing rod (702) forms a sliding fit with the arc-shaped hole (704), the auxiliary brake plate (701) is fixedly connected to one side of the bottom of the swing rod (702), and the connecting shaft (601) passes through the connecting hole (703) and is fixedly connected to the middle section of the swing rod (702).

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