Yaw brake and wind driven generator

Abstract

The yaw brake is used for a wind driven generator and comprises an upper shell, a lower shell, multiple oil cylinders and brake pads, the multiple oil cylinders communicate with one another and are arranged in the upper shell and the lower shell correspondingly, the oil cylinders are provided with pistons, and after oil is injected into the oil cylinders, the pistons are arranged in the upper shell and the lower shell correspondingly. And when the brake pad is pressed, the piston can be pushed to move, and the brake pad is extruded, so that friction is generated between the brake pad and a brake disc of the wind driven generator, and yaw braking of the wind driven generator is completed. According to the yaw brake provided by the embodiment of the utility model, the brake capacity is improved by optimizing the structure of the brake, so that the stability and the safety of the wind driven generator are remarkably improved. The embodiment of the invention further provides the wind driven generator.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of power equipment, and in particular to a yaw brake and a wind turbine. Background Art

[0002] As a vital component of renewable energy generation, wind turbines require critical operational stability and safety. The yaw brake system is a key component of wind turbines, used to lock the rotor's direction when necessary, preventing it from yaw in harsh conditions such as strong winds, thereby protecting the turbine structure from damage.

[0003] However, existing yaw brake systems often have design problems such as insufficient braking capacity, uneven braking, and slow response speed. Especially in extreme wind conditions, these problems may lead to brake failure and seriously affect the safe operation of the unit. Utility Model Content

[0004] The main purpose of the embodiments of the present application is to provide a yaw brake and a wind turbine, aiming to significantly improve the stability and safety of the wind turbine by optimizing the brake structure and improving the braking capability.

[0005] To achieve the above-mentioned objectives, in the first aspect, an embodiment of the present application proposes a yaw brake for a wind turbine, wherein the yaw brake includes an upper shell, a lower shell, a cylinder and a brake pad. There are multiple cylinders, and the multiple cylinders are interconnected. The multiple cylinders are respectively arranged in the upper shell and the lower shell. The cylinder is provided with a piston. After the cylinder is filled with oil, it can push the piston to move and squeeze the brake pad, so that the brake pad rubs against the brake disc of the wind turbine to complete the yaw braking of the wind turbine.

[0006] Furthermore, the number of the oil cylinders is six, and the upper shell and the lower shell are respectively provided with three oil cylinders, and the three oil cylinders on the upper shell or the lower shell are arranged in parallel.

[0007] Furthermore, the upper shell or the lower shell is also provided with an oil inlet hole, a hydraulic oil pipe, and an oil drain hole. The six cylinders are connected through the hydraulic oil pipe. The oil inlet hole is used for injecting hydraulic oil. The hydraulic oil flows into the cylinder through the hydraulic oil pipe and is discharged through the oil drain hole.

[0008] Furthermore, a sealing ring is included, which is detachably arranged between the inner wall of the oil cylinder and the outer peripheral surface of the piston.

[0009] Furthermore, the sealing ring includes a guide band, a first step seal, a second step seal and a dust ring. The dust ring, the first step seal, the second step seal and the guide band are sequentially distributed along the axial direction of the piston and abut against the inner wall of the cylinder.

[0010] Furthermore, it also includes an upper brake pad and a lower brake pad that are arranged opposite to each other. The upper brake pad is arranged at the end of the piston of the upper shell, and the lower brake disc is arranged at the end of the piston of the lower shell.

[0011] Furthermore, it also includes an upper brake pad and a lower brake pad, the upper brake pad is arranged between the piston of the upper housing and the upper brake pad, and the lower brake pad is arranged between the piston of the lower housing and the lower brake pad.

[0012] Furthermore, it also includes an upper caliper body and a lower caliper body, the upper caliper body is arranged on the upper shell, and the lower caliper body is arranged on the lower shell, the upper caliper body of the upper shell and the lower caliper body of the lower shell are respectively provided with three of the oil cylinders, the upper caliper body is provided with an upper notch on the side facing the upper brake pad, and the lower caliper body is provided with a lower notch on the side facing the lower brake pad, and the brake disc of the wind turbine is accommodated in the opening formed by the upper notch and the lower notch.

[0013] Furthermore, the upper shell and the lower shell are fixed by the bolts, and the yaw brake is fixed to the nacelle casting of the wind turbine by the bolts.

[0014] In a second aspect, an embodiment of the present application further provides a wind turbine, comprising a yaw brake as described in any one of the above items.

[0015] In the yaw brake provided in the embodiments of the present application, a cylinder is disposed within the upper and lower housings and is equipped with a piston. Once the cylinder is filled with oil, it pushes the piston to move and compress the brake pad, causing friction between the brake pad and the wind turbine's brake disc to achieve yaw braking of the wind turbine, thereby preventing the wind turbine's rotor from yaw. Furthermore, there are multiple, interconnected cylinders, and the piston in each cylinder can move axially, compressing the brake pad and increasing the pressure on the brake pad, causing friction between the brake pad and the brake disc, improving the brake pad's braking capacity, and thereby enhancing the stability and safety of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 A schematic side view of the structure of the yaw brake provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the yaw brake;

[0019] Figure 3 for Figure 1 Schematic diagram of the bottom structure of the upper shell of the yaw brake.

[0020] Description of Figure Numbers:

[0021]

[0022]

[0023] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] Therefore, refer to Figures 1 to 3 An embodiment of the present application provides a yaw brake 100 for a wind turbine. The yaw brake 100 includes an upper shell 110, a lower shell 120, an oil cylinder 130, and a brake pad 140. There are multiple oil cylinders 130, which are interconnected. The multiple oil cylinders 130 are respectively arranged in the upper shell 110 and the lower shell 120. The oil cylinder 130 is provided with a piston 131. After the oil cylinder 130 is filled with oil, it can push the piston 131 to move and squeeze the brake pad 140, so that the brake pad 140 rubs against the brake disc of the wind turbine to complete the yaw braking of the wind turbine.

[0029] Specifically, if Figures 1 to 3As shown, the oil cylinder 130 is disposed within the upper housing 110 and the lower housing 120. The oil cylinder 130 is provided with a piston 131. When the oil cylinder 130 is filled with oil, it can push the piston 131 to move and squeeze the brake pad 140, causing the brake pad 140 to rub against the brake disc of the wind turbine to complete the yaw braking of the wind turbine, thereby preventing the wind turbine rotor from yaw. In addition, there are multiple oil cylinders 130, which are interconnected. The piston of each oil cylinder 130 can move axially, thereby squeezing the brake pad 140, increasing the pressure of the brake pad 140, causing the brake pad 140 to rub against the brake disc, improving the braking ability of the brake pad 140, and thereby improving the stability and safety of the wind turbine.

[0030] Furthermore, in some embodiments of the present application, the number of the oil cylinders 130 is six, and the upper shell 110 and the lower shell 120 are respectively provided with three oil cylinders, and the three oil cylinders 130 on the upper shell 110 or the lower shell 120 are arranged in parallel.

[0031] Compared with the existing yaw brake, the number of cylinders 130 of the yaw brake 100 provided in the embodiment of the present application is increased to six, that is, the upper shell 110 and the lower shell 120 are respectively provided with three cylinders, and the three cylinders 130 on the upper shell 110 or the lower shell 120 are arranged in parallel, thereby further increasing the pressure of the brake pad 140, so that the brake pad 140 rubs against the brake disc, thereby improving the braking ability of the brake pad 140, and thereby improving the stability and safety of the wind turbine.

[0032] Further, refer to Figure 2 and Figure 3 In some embodiments of the present application, the upper shell 110 or the lower shell 120 of the yaw brake 100 further includes an oil inlet hole 111, a hydraulic oil pipe 112 and an oil drain hole 113. The six cylinders 130 are connected through the hydraulic oil pipe 112. The hydraulic oil is injected into the oil inlet hole 111, and the hydraulic oil flows into the cylinder 130 through the hydraulic oil pipe 112 and is discharged through the oil drain hole 113.

[0033] That is, hydraulic oil can be injected through the oil inlet hole 111, flow into the oil cylinder 130 through the hydraulic oil pipe 112, and be discharged through the oil drain hole 113, thereby providing power for pushing the piston 131 of the oil cylinder 130, and each oil cylinder 130 is interconnected, and hydraulic oil can enter each oil cylinder 130 through the hydraulic oil pipe 112. The structure is simple, thereby saving manufacturing costs.

[0034] Further, refer to Figure 2In some embodiments of the present application, the yaw brake 100 further includes a sealing ring 150, which is detachably disposed between the inner wall of the oil cylinder 130 and the outer circumferential surface of the piston 131. The sealing ring 150 is used to prevent the hydraulic oil in the oil cylinder 130 from leaking out and contaminating the external environment.

[0035] Further, refer again to Figure 2 In some embodiments of the present application, the sealing ring 150 includes a guide band 151, a first step seal 152, a second step seal 153 and a dust ring 154. The guide band 151, the first step seal 152, the second step seal 153 and the dust ring 154 are distributed in sequence along the axial direction of the piston 131 and abut against the inner wall of the cylinder 130.

[0036] In the yaw brake 100 provided in the embodiment of the present application, the sealing ring 150 includes a guide belt 151, a first step seal 152, a second step seal 153 and a dust ring 154. The main function of the guide belt 151 is to guide the moving parts and prevent the cylinder and piston from wearing. The double-layer setting of the first step seal 152 and the second step seal 153 is to further improve the sealing effect. The main function of the dust ring 154 is to prevent external dust and pollutants from entering the oil cylinder 130. Figure 2 As shown, the guide belt 151, the first step seal 152, the second step seal 153 and the dust ring 154 are distributed in sequence from bottom to top along the axial direction of the piston 131, and abut against the inner wall of the cylinder 130. In the upper shell 110, the guide belt 151, the first step seal 152, the second step seal 153 and the dust ring 154 are distributed in sequence from top to bottom along the axial direction of the piston 131, and abut against the inner wall of the cylinder 130, thereby ensuring the operating stability of the cylinder 130 and the piston 131, and preventing the hydraulic oil in the cylinder 130 from leaking.

[0037] Further, refer to Figure 2 In some embodiments of the present application, the yaw brake 100 further includes an upper brake pad (not shown) and a lower brake pad 141 that are arranged opposite to each other, the upper brake pad is arranged at the end of the piston 131 of the upper shell 110, and the lower brake pad 141 is arranged at the end of the piston 131 of the lower shell 120.

[0038] As described above, the function of the brake pad is to squeeze the brake disc of the wind turbine under the push of the piston, thereby achieving yaw braking. The yaw brake 100 also includes an upper brake pad (not shown) and a lower brake pad 141 that are relatively arranged, so that braking can be performed from the upper and lower sides of the brake disc to ensure yaw braking and ensure stable operation of the wind turbine.

[0039] Further, refer again to Figure 2In some embodiments of the present application, the yaw brake 100 further includes an upper brake pad (not shown) and a lower brake pad 122. The upper brake pad is disposed between the piston 130 of the upper housing 110 and the upper brake pad, while the lower brake pad 122 is disposed between the piston 130 of the lower housing 120 and the lower brake pad 141. The brake pads of the yaw brake 100 function to isolate the piston 131 of the oil cylinder 130 from the brake pad, preventing friction or wear therebetween, thereby increasing the service life of the piston 131 and the upper and lower brake pads.

[0040] Further, refer again to Figure 2 In some embodiments of the present application, the yaw brake 100 further includes an upper caliper 114 and a lower caliper 123. The upper caliper 114 is disposed on the upper housing 110, and the lower caliper 123 is disposed on the lower housing 120. The upper caliper 114 of the upper housing 110 and the lower caliper 123 of the lower housing 120 are each provided with three hydraulic cylinders 130. An upper notch is provided on the side of the upper caliper 114 facing the upper brake pad, and a lower notch is provided on the side of the lower caliper 123 facing the lower brake pad 141. The wind turbine's brake disc is accommodated within the opening formed by the upper and lower notches. When the wind turbine yaws, the wind turbine's brake disc is accommodated within the opening formed by the upper and lower notches. Hydraulic oil is injected into the hydraulic cylinder 130, pushing the piston 131 up and down, squeezing the upper and lower brake pads 141, thereby generating friction with the brake disc to achieve yaw braking of the wind turbine, thereby preventing the wind turbine's rotor from yaw.

[0041] Further, refer to Figure 2 In some embodiments of the present application, the yaw brake 100 further includes bolts 160, and the upper shell 110 and the lower shell 120 are fixed by the bolts 160. The yaw brake 100 is fixed to the nacelle casting of the wind turbine by the bolts 160, ensuring that the yaw brake 100 can operate stably to perform the yaw braking operation of the wind turbine, thereby preventing the wind turbine rotor from yaw.

[0042] Secondly, embodiments of the present application further provide a wind turbine, comprising a yaw brake 100 as described in any of the above embodiments. The specific structure of yaw brake 100 is similar to that of the above embodiments. Since yaw brake 100 utilizes all the technical solutions of all of the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, and therefore will not be further elaborated here.

[0043] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application description and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A yaw brake for a wind turbine, characterized in that: The yaw brake includes an upper shell, a lower shell, a cylinder and a brake pad. There are multiple cylinders, which are interconnected and respectively arranged in the upper shell and the lower shell. The cylinder is provided with a piston. After the cylinder is filled with oil, it can push the piston to move and squeeze the brake pad, so that the brake pad rubs against the brake disc of the wind turbine to complete the yaw braking of the wind turbine.

2. The yaw brake according to claim 1, wherein: The number of the oil cylinders is six, and the upper shell and the lower shell are respectively provided with three oil cylinders, and the three oil cylinders on the upper shell or the lower shell are arranged in parallel.

3. The yaw brake according to claim 2, characterized in that The upper shell or the lower shell is also provided with an oil inlet hole, a hydraulic oil pipe, and an oil drain hole. The six cylinders are connected through the hydraulic oil pipe. The hydraulic oil is injected into the oil inlet hole, and the hydraulic oil flows into the cylinder through the hydraulic oil pipe and is discharged through the oil drain hole.

4. The yaw brake according to any one of claims 1 to 3, characterized in that: It also includes a sealing ring, which is detachably arranged between the inner wall of the oil cylinder and the outer peripheral surface of the piston.

5. The yaw brake according to claim 4, characterized in that The sealing ring includes a guide belt, a first step seal, a second step seal and a dust ring. The guide belt, the first step seal, the second step seal and the dust ring are sequentially distributed along the axial direction of the piston and abut against the inner wall of the cylinder.

6. The yaw brake according to claim 5, characterized in that The utility model further comprises an upper brake pad and a lower brake pad which are arranged opposite to each other. The upper brake pad is arranged at the end of the piston of the upper shell, and the lower brake pad is arranged at the end of the piston of the lower shell.

7. The yaw brake according to claim 6, characterized in that The utility model further comprises an upper brake pad and a lower brake pad. The upper brake pad is arranged between the piston of the upper housing and the upper brake pad, and the lower brake pad is arranged between the piston of the lower housing and the lower brake pad.

8. The yaw brake according to claim 7, characterized in that It also includes an upper caliper body and a lower caliper body, the upper caliper body is arranged on the upper shell, and the lower caliper body is arranged on the lower shell. The upper caliper body of the upper shell and the lower caliper body of the lower shell are respectively provided with three of the oil cylinders. An upper notch is provided on the side of the upper caliper body facing the upper brake pad, and a lower notch is provided on the side of the lower caliper body facing the lower brake pad. The brake disc of the wind turbine is accommodated in the opening formed by the upper notch and the lower notch.

9. The yaw brake according to claim 1, wherein: It also includes bolts, through which the upper shell and the lower shell are fixed, and the yaw brake is fixed to the nacelle casting of the wind turbine through the bolts.

10. A wind turbine, characterized in that: Comprising the yaw brake according to any one of claims 1 to 9.

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