Wind power hydraulic single-cylinder brake

Abstract

The utility model discloses a kind of wind power hydraulic single-cylinder brake, belong to brake device technical field, including brake body, brake body is provided with connecting pipe, connecting pipe is connected with valve assembly, the side of valve assembly away from connecting pipe is connected with energy storage tank, can ensure that brake cylinder is safely operated under steady pressure condition, reduce the risk of fan cabin and platform pollution caused by explosion cylinder, oil leakage and other problems, improve the reliability and service life of equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of braking devices, specifically a wind power hydraulic single-cylinder brake. Background Technology

[0002] During wind turbine operation, brakes are required for both the nacelle and the platform. The main reason is that the wind turbine needs to continuously adjust the rotor's orientation via a yaw system to achieve optimal wind energy utilization. After adjustment, the brakes must be used to lock the rotor in place to prevent it from shifting due to inertia or external wind disturbances, which could affect power generation efficiency and equipment safety. Furthermore, in cases of turbine maintenance, shutdown, or emergency situations, the brakes can quickly disconnect the drive chain, ensuring the safety and stability of the nacelle and platform.

[0003] Utility model patent CN207131529U discloses a yaw brake cylinder for wind turbines capable of monitoring yaw status. The cylinder includes a brake cylinder, a cylinder head, and a yaw monitoring platform. The brake cylinder and cylinder head are bolted together via bolt holes. The brake cylinder contains a piston and a pressure column. The inner wall of the brake cylinder has an inner sealing ring, an outer sealing ring, and a dustproof ring. The piston is in close contact with these sealing rings. A guide ring is provided between the outer sealing ring and the dustproof ring. The brake cylinder end has an oil inlet and an oil outlet. The pressure column end has a brake pad. The yaw monitoring platform includes a low-frequency acceleration sensor, a wind turbine switch, a data acquisition unit, a nacelle switch, a tower base switch, and a field server. The brake cylinder sealing rings are not easily damaged, preventing brake failure. The monitoring platform ensures real-time monitoring of the wind turbine's heading, enabling timely braking of the wind turbine.

[0004] However, in this structure, when the hydraulic pressure inside the cylinder exceeds the limit, the mounting bolts of the brake cylinder are prone to breakage, or the piston may be directly ejected, leading to the brake cylinder bursting. Furthermore, when cylinder bursting or piston slippage occurs, a large amount of hydraulic oil will leak from the brake, which will not only cause complete failure of the braking function, but also cause serious pollution to the wind turbine nacelle and platform, increasing the difficulty of equipment maintenance and operational risks. Utility Model Content

[0005] The purpose of this utility model is to provide a wind power hydraulic single-cylinder brake to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A wind power hydraulic single-cylinder brake is provided, including a brake body, a connecting pipe on the brake body, a valve assembly connected to the connecting pipe, and an energy storage tank connected to the side of the valve assembly away from the connecting pipe.

[0007] Furthermore, the brake body includes a brake housing, an oil chamber is provided inside the brake housing, a piston is movably connected inside the oil chamber, a pressure column is provided on one side of the brake housing, an oil inlet pipe and an oil outlet pipe are respectively provided on both sides of the brake housing, and a connecting pipe is provided on the brake housing.

[0008] Furthermore, an oil drain hole is provided on the outer side of the brake housing.

[0009] Furthermore, the brake housing is provided with several connecting bolts.

[0010] Furthermore, several connecting bolts are installed inside the bolt connection holes.

[0011] Furthermore, the valve assembly includes a return pipe connected to one side of the connecting pipe, and a pressure relief pipe is also provided on one side of the connecting pipe. Both the return pipe and the pressure relief pipe are connected to an energy storage tank on the side away from the connecting pipe.

[0012] Furthermore, a one-way valve is installed on the return pipe.

[0013] Furthermore, an overflow valve is provided on the pressure relief pipe.

[0014] Furthermore, the outer side of the energy storage tank is detachably connected to the brake housing via a connecting bracket.

[0015] Furthermore, a pressure sensor is also installed on the oil inlet pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: When encountering extreme or severe operating conditions, if the internal pressure of the brake body exceeds the design limit, the overflow valve in the valve assembly will be opened, and some high-pressure hydraulic oil will enter the energy storage tank for storage, reducing the instantaneous pressure of the brake cylinder and avoiding accidents such as bolt breakage or piston slippage caused by sudden pressure rise. When the system pressure returns to normal, the hydraulic oil in the energy storage tank will slowly flow back to the brake cylinder under the control of the overflow valve, ensuring the oil circuit is closed and preventing hydraulic oil leakage. This ensures the safe operation of the brake cylinder under stable pressure conditions, reduces the risk of contamination of the wind turbine nacelle and platform due to problems such as cylinder explosion and oil leakage, and improves the reliability and service life of the equipment. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 A schematic diagram of the overall structure of a wind power hydraulic single-cylinder brake provided by this utility model; Figure 2 A schematic diagram of the cross-sectional structure of the brake housing provided by this utility model; Figure 3 A schematic diagram of the valve assembly provided by this utility model.

[0019] In the diagram: 1. Brake body; 11. Brake housing; 111. Oil drain hole; 112. Bolt connection hole; 12. Oil chamber; 13. Piston; 14. Pressure column; 15. Oil inlet pipe; 16. Oil outlet pipe; 17. Connecting bolt; 2. Connecting pipe; 3. Valve assembly; 31. Return pipe; 32. Pressure relief pipe; 33. Check valve; 34. Overflow valve; 4. Energy storage tank; 5. Connecting bracket; 6. Pressure sensor. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-3 As shown in the present invention, a wind power hydraulic single-cylinder brake includes a brake body 1, a connecting pipe 2 is provided on the brake body 1, a valve assembly 3 is connected to the connecting pipe 2, and an energy storage tank 4 is connected to the side of the valve assembly 3 away from the connecting pipe 2. The wind power hydraulic single-cylinder brake includes a brake body 1, a connecting pipe 2 on the brake body 1, a valve assembly 3 connected to the connecting pipe 2, and an energy storage tank 4 connected to the side of the valve assembly 3 away from the connecting pipe 2. The brake body 1 is supplied with hydraulic power through the hydraulic station of the yaw braking system. The hydraulic oil enters the brake cylinder through the external oil inlet pipe, thereby driving the piston 13 and generating braking force. Within the normal operating pressure range, the hydraulic oil only circulates within the brake cylinder and the pipeline, and the energy storage tank 4 is in a standby state. When encountering extreme or severe operating conditions, if the internal pressure of the brake body 1 exceeds the design limit, the relief valve 34 in the valve assembly 3 will be opened, and some high-pressure hydraulic oil will enter the storage tank 4 for storage, reducing the instantaneous pressure of the brake cylinder and preventing accidents such as bolt breakage or piston 13 slippage caused by a sudden pressure increase. When the system pressure returns to normal, the hydraulic oil in the storage tank 4 will slowly flow back to the brake cylinder under the control of the relief valve 34, ensuring the oil circuit is closed and preventing hydraulic oil leakage. In this way, the entire system can achieve automatic unloading under high pressure and recovery after the pressure stabilizes. The closed oil circuit ensures the safety and airtightness of the braking system. When the pressure inside the cylinder exceeds the limit, the energy storage tank 4 can automatically share and release part of the oil pressure, thereby effectively avoiding problems such as bolt breakage and piston 13 slippage. When the pressure returns to stability, the hydraulic oil in the energy storage tank 4 will flow back to the brake body 1 through the overflow valve 34, keeping the system airtight and preventing hydraulic oil leakage. This ensures that the brake cylinder operates safely under stable pressure conditions, reduces the risk of contamination of the wind turbine nacelle and platform due to problems such as cylinder explosion and oil leakage, and improves the reliability and service life of the equipment.

[0027] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the brake body 1 includes a brake housing 11, an oil chamber 12 is provided inside the brake housing 11, a piston 13 is movably connected inside the oil chamber 12, a pressure column 14 is provided on one side of the brake housing 11, an oil outlet pipe 16 is provided on one side of the brake housing 11, and a connecting pipe 2 is provided on the brake housing 11. The oil chamber 12 serves as a hydraulic action space for storing and transmitting hydraulic oil. The piston 13 is movably disposed within the oil chamber 12 and can generate reciprocating motion under the action of hydraulic oil, converting hydraulic pressure into mechanical force. The pressure column 14 moves in the same direction as the piston 13 and is used to directly act on the friction pads or brake disc to achieve braking of the wind turbine yaw system. The oil outlet pipe 16 is located on one side of the housing for the return or discharge of hydraulic oil, ensuring that the system pressure is controllable and maintaining the stability of the hydraulic circuit. The connecting pipe 2 serves as an interface with the valve assembly and external hydraulic station, realizing the input and output connection of the oil circuit. With the cooperation of the above structures, the brake can achieve stable braking function under normal working conditions. Under abnormal working conditions, it can work in conjunction with the energy storage tank 4 through oil circuit switching to ensure the safe and reliable operation of the braking system. During the pressure adjustment or unloading process of the hydraulic station, the hydraulic oil can flow back through the oil outlet pipe 16 to avoid excessive pressure in the oil chamber 12. The brake housing 11 is also equipped with a connecting pipe 2, which is connected to the valve assembly 3. It can be connected to the hydraulic station to input high-pressure oil or to the energy storage tank 4. When the pressure in the oil chamber 12 exceeds the limit, some hydraulic oil enters the energy storage tank 4 through the connecting pipe 2, thereby effectively sharing the system pressure.

[0028] In one embodiment, see Figure 1 and Figure 2 As shown, an oil drain hole 111 is provided on the outside of the brake housing 11. As shown in the embodiment, the oil drain hole 111 is provided on the outside of the brake housing 11. The oil drain hole 111 is connected to the oil chamber 12. A plug or control valve can be installed on the oil drain hole 111. When the oil needs to be replaced or the system needs to be repaired, the operator only needs to unscrew the plug or open the control valve to discharge the hydraulic oil in the oil chamber 12 through the oil drain hole 111. The operation is simple and does not affect the main structure of the brake. Under normal operating conditions, the oil drain hole 111 is generally closed to maintain the airtightness of the oil chamber 12. When the hydraulic system experiences an abnormal pressure increase that exceeds the design safety value, the pressure can be temporarily released manually through the oil drain hole 111 to release some hydraulic oil, thereby reducing the pressure inside the oil chamber 12 and ensuring that the overall structure of the brake cylinder is not damaged.

[0029] In one embodiment, see Figure 1 and Figure 2 As shown, a number of connecting bolts 17 are provided on the brake housing 11. The connecting bolts 17 are evenly arranged on the brake housing 11 along the circumferential direction. The connecting bolts 17 penetrate the brake housing 11 and are threadedly engaged with the end cover to form a reliable mechanical locking structure. By tightening the connecting bolts 17, the brake housing 11 can be firmly connected to the end cover or related fixing components, so that the oil chamber 12 is kept sealed and the hydraulic oil is prevented from leaking under high pressure.

[0030] In one embodiment, see Figure 1 and Figure 2 As shown, several connecting bolts 17 are installed in the bolt connection holes 112. The connecting bolts 17 pass through the bolt connection holes 112 and cooperate with the threaded holes on the end cover. By tightening, the brake housing 11 and the end cover are reliably fixed, forming a seal on the oil chamber 12.

[0031] In one embodiment, see Figure 1 and Figure 2 As shown, valve assembly 3 includes a return pipe 31 connected to one side of connecting pipe 2. A pressure relief pipe 32 is also provided on one side of connecting pipe 2. Both the return pipe 31 and the pressure relief pipe 32, on the side away from connecting pipe 2, are connected to an energy storage tank 4. One end of the return pipe 31 is connected to connecting pipe 2, and the other end is connected to energy storage tank 4, used to return hydraulic oil in energy storage tank 4 to the brake cylinder when the system pressure decreases. The pressure relief pipe 32 is arranged in parallel with connecting pipe 2, with one end connected to connecting pipe 2 and the other end also connected to energy storage tank 4. An overflow valve 34 is provided inside. When the pressure in oil chamber 12 exceeds a set threshold, the overflow valve 34 automatically opens, and high-pressure oil enters energy storage tank 4 through pressure relief pipe 32, completing the pressure relief process. Under normal operating conditions, both the return pipe 31 and the pressure relief pipe 32 are closed or in standby mode, and the brake cylinder relies on the hydraulic station for oil supply to achieve normal braking. Under extreme conditions, when the brake cylinder pressure exceeds the limit value, the pressure relief pipe 32 quickly distributes the excess pressure to prevent the brake cylinder from bursting. After the pressure stabilizes, the oil in the energy storage tank 4 slowly flows back to the brake cylinder through the return pipe 31, ensuring the system's oil balance and tightness. Through this dual-pipe structure, the valve assembly 3 achieves rapid pressure relief in abnormal situations and automatic oil return after normal operation, significantly improving the safety and stability of the braking system.

[0032] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a one-way valve 33 is installed on the return pipe 31. Under the control of the valve core, the one-way valve 33 only allows hydraulic oil to flow from the energy storage tank 4 to the brake cylinder, and prohibits hydraulic oil from flowing into the energy storage tank 4 through the return pipe 31 when the brake cylinder is under high pressure. During normal system operation, the brake cylinder is supplied with oil by the hydraulic station, the one-way valve 33 is closed, and the return pipe 31 is not open. When the brake cylinder pressure exceeds the limit value, the high-pressure hydraulic oil enters the energy storage tank 4 through the pressure relief pipe 32 for storage. After the pressure returns to normal, the hydraulic oil in the energy storage tank 4 flows back to the brake cylinder through the return pipe 31 and the one-way valve 33 under the action of the system pressure difference, thereby compensating for the system oil volume and maintaining a tight seal. Through this design, the one-way valve 33 ensures the one-way oil return function of the return pipe 31, avoids turbulent flow of hydraulic oil under different operating conditions, and improves the stability and safety of the braking system.

[0033] In one specific embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, a relief valve 34 is installed on the pressure relief pipe 32, and the relief valve 34 is installed in the middle of the pressure relief pipe 32. The relief valve 34 is a spring-loaded structure, and its opening pressure can be set according to the working requirements of the brake cylinder. For example, when the pressure in the oil chamber 12 exceeds the preset value, the hydraulic oil pushes the valve core of the relief valve 34 to overcome the spring force and open, and the high-pressure oil enters the energy storage tank 4 through the pressure relief pipe 32, thereby reducing the instantaneous pressure of the oil chamber 12; Once the pressure returns to the normal range, the relief valve 34 closes under the action of the spring return force, cutting off the oil passage and preventing hydraulic oil from continuing to flow into the storage tank 4. At this time, the hydraulic oil in the storage tank 4 flows back to the brake cylinder through the return pipe 31 and the one-way valve 33, completing the pressure balance and oil compensation. Through this design, the relief valve 34 can achieve automatic pressure relief under high pressure and maintain a sealed state after the pressure returns to normal, ensuring the stability and airtightness of the braking system.

[0034] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, the energy storage tank 4 is detachably connected to the brake housing 11 via a connecting bracket 5. The outer side of the energy storage tank 4 is provided with a mounting boss or an annular groove, and the connecting bracket 5 is correspondingly provided with a clamping structure or threaded holes. The connecting bracket 5 is fixed to the brake housing 11 by bolts, clips, or quick-release parts, forming a detachable installation. In use, the energy storage tank 4 is securely installed on one side of the brake housing 11 via the connecting bracket 5, communicating with the return pipe 31 and the pressure relief pipe 32, ensuring smooth circulation of oil between the brake cylinder and the energy storage tank 4. During maintenance or replacement, personnel only need to loosen the fasteners on the connecting bracket 5 to disassemble the energy storage tank 4 separately for inspection or replacement without affecting the overall structure and normal use of the brake body 1. Through this design, the energy storage tank 4 achieves a stable, reliable, and flexible installation method, which is beneficial to the long-term safe operation and subsequent maintenance of the braking system.

[0035] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a pressure sensor 6 is also installed on the oil inlet pipe 15. The pressure sensor 6 is installed on the oil inlet pipe 15 near the inlet of the energy storage tank 4. The pressure sensor 6 is electrically connected to the control unit through an electrical wire and can transmit real-time pressure signals to the controller. During system operation, when hydraulic oil enters the energy storage tank 4 through the oil inlet pipe 15, the pressure sensor 6 detects its pressure value in real time. If the detected value is lower than the set threshold, the control system will issue an insufficient oil supply alarm, prompting you to check the oil source or pipeline sealing. If the detected value is higher than the set threshold, the control system will control the overflow valve 34 to open or bypass the return oil to maintain the pipeline pressure within a reasonable range. During normal operation, the pressure sensor 6 continuously monitors the inlet pressure curve and feeds the data back to the control system for working condition adjustment and long-term operating status analysis.

[0036] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A wind power hydraulic single-cylinder brake, comprising a brake body (1), characterized in that, The brake body (1) is provided with a connecting pipe (2), and a valve assembly (3) is connected to the connecting pipe (2). An energy storage tank (4) is connected to the side of the valve assembly (3) away from the connecting pipe (2). The valve assembly (3) includes a return pipe (31), which is connected to one side of the connecting pipe (2). A pressure relief pipe (32) is also provided on one side of the connecting pipe (2). The energy storage tank (4) is connected to both the side of the return pipe (31) and the side of the pressure relief pipe (32) away from the connecting pipe (2).

2. The wind power hydraulic single-cylinder brake according to claim 1, characterized in that, The brake body (1) includes a brake housing (11), an oil chamber (12) is provided inside the brake housing (11), a piston (13) is movably connected inside the oil chamber (12), a pressure column (14) is provided on one side of the brake housing (11), an oil inlet pipe (15) and an oil outlet pipe (16) are respectively provided on both sides of the brake housing (11), and a connecting pipe (2) is provided on the brake housing (11).

3. A wind power hydraulic single-cylinder brake according to claim 2, characterized in that, An oil drain hole (111) is provided on the outside of the brake housing (11).

4. A wind power hydraulic single-cylinder brake according to claim 3, characterized in that, The brake housing (11) is provided with several connecting bolts (17).

5. A wind power hydraulic single-cylinder brake according to claim 4, characterized in that, Several connecting bolts (17) are set in the bolt connection hole (112).

6. A wind power hydraulic single-cylinder brake according to claim 1, characterized in that, A one-way valve (33) is provided on the return pipe (31).

7. A wind power hydraulic single-cylinder brake according to claim 1, characterized in that, An overflow valve (34) is provided on the pressure relief pipe (32).

8. A wind power hydraulic single-cylinder brake according to claim 1, characterized in that, The energy storage tank (4) is detachably connected to the brake housing (11) via a connecting bracket (5).

9. A wind power hydraulic single-cylinder brake according to claim 2, characterized in that, A pressure sensor (6) is also installed on the oil inlet pipe (15).

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