Inner rotating shaft braking mechanism of offshore wind driven generator
By designing an internal rotating brake mechanism for offshore wind turbines, the use of cylinder driving U -shaped blocks and reducers to achieve friction deceleration, which solves the problem of rotating axis urgency under the conditions of strong winds. Stable and efficient deceleration effect.
Patent Information
- Application Number
- CN202420050498.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-09
AI Technical Summary
Offshore wind turbines are difficult to effectively reduce their speed under strong wind conditions, resulting in emergency stopping of the shaft and damage risks.
The inner rotation brake mechanism of the offshore wind turbine is designed, which uses cylinder driving U -shaped push block to promote the reducer on the outer wall of the rotor. The limited board with elastic U -shaped blocks and symmetrical settings achieves multi -point friction deceleration.
Effectively avoid the emergency stopping phenomenon during the deceleration process, ensure the long -term stable operation of the equipment, and improve the deceleration effect and the life of the mechanism.
Smart Images
Figure CN222415716U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind turbine equipment, in particular to an inner shaft braking mechanism of an offshore wind turbine. Background Art
[0002] Wind power generation has many advantages, especially in terms of environmental protection, construction cycle and operation and maintenance costs. Compared with traditional energy sources, wind energy is a clean and renewable energy source. It does not produce harmful emissions and is therefore environmentally friendly. The emerging offshore wind power has surpassed land wind power and has greater development potential. Compared with land wind power, offshore wind power can utilize wind energy at higher wind speeds, thereby improving power generation efficiency.
[0003] However, when offshore wind turbines encounter strong winds, effective measures need to be taken to reduce the generator speed. The traditional approach is to use a cylinder to push the brake pads to slow down, but this method has some disadvantages. This working mode may cause the shaft to stop suddenly, and the wind turbine will be at risk of damage under the action of inertia. For this reason, we propose an internal shaft braking mechanism for offshore wind turbines. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies of the prior art, the utility model provides an internal shaft braking mechanism of an offshore wind turbine generator to solve the above-mentioned problems existing in the prior art.
[0006] (II) Technical solution
[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: an internal rotating shaft braking mechanism of an offshore wind turbine, comprising a mounting frame, a cylinder is provided on the mounting frame, and the end of the telescopic shaft of the cylinder is provided with a U-shaped push block with two side walls inclined toward the middle, and the mounting frame is symmetrically provided with support rods, and a rotating plate is rotatably connected to the support rod, one side of the rotating plate is connected to one side of the support rod by a spring, and one end of the rotating plate is rotatably connected to a rotating wheel, the outer wall of the rotating wheel abuts against the inclined side wall of the U-shaped push block, and a speed reducer is provided on the side of the rotating plate away from the rotating wheel.
[0008] Furthermore, a push arm is provided on the outer wall of the cylinder telescopic shaft, a first push rod is provided at one end of the push arm away from the telescopic shaft, a first U-shaped vertical plate is provided on the side of the first push rod away from the push arm, and first limit plates are symmetrically provided on both side walls of the first U-shaped vertical plate.
[0009] Furthermore, a rotating rod is rotatably connected to the mounting frame, and a sliding sleeve is symmetrically slidably connected to the outer wall of the rotating rod. The sliding sleeve is rotatably connected to the first push rod on one side, and a second push rod is rotatably connected to the sliding sleeve on the other side. A second U-shaped vertical plate is provided at one end of the second push rod, and second limit plates are symmetrically provided on both side walls of the second U-shaped vertical plate.
[0010] Furthermore, a side of the first push rod away from the first U-shaped vertical plate is in a rectangular structure, and the rectangular structure is slidably connected to the mounting frame.
[0011] Furthermore, a side of the second push rod away from the second U-shaped vertical plate is in a rectangular structure, and the rectangular structure is slidably connected to the mounting frame.
[0012] Furthermore, both the first limiting plate and the second limiting plate are arc-shaped, and the concave arc-shaped sides of the two are correspondingly arranged.
[0013] (III) Beneficial effects
[0014] The embodiment of the utility model provides a braking mechanism for the inner shaft of an offshore wind turbine generator, which has the following beneficial effects:
[0015] Start the cylinder, and the telescopic shaft pushes the U-shaped push block, so that the speed reducers on both sides are stuck on the outer wall of the rotating shaft. The side walls of the U-shaped push block are elastic, and the speed reducers will not be stuck on the outer wall of the rotating shaft. They can only form friction on the rotating shaft to reduce the speed of the rotating shaft, thereby avoiding the sudden stop of the wind turbine during the deceleration process and causing damage to it, ensuring its long-term stable operation. The U-shaped push block continues to move forward, and its two side walls are pressed against each other. At this time, the speed reducers on both sides are attached to the outer wall of the rotating shaft, thereby further decelerating the rotating shaft and improving the deceleration effect.
[0016] By symmetrically setting the first limit plate and the second limit plate to decelerate multiple points on the outer wall of the shaft, not only the deceleration effect can be improved, but also excessive wear and tear caused by excessive friction at a single deceleration point can be avoided, thereby increasing the life of the deceleration mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a main perspective schematic diagram of the overall structure of the utility model;
[0018] Figure 2 It is a top-down perspective schematic diagram of the overall structure of the utility model;
[0019] Figure 3 It is a right-side stereoscopic schematic diagram of the overall structure of the utility model;
[0020] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure in the middle.
[0021] In the figure: 1. mounting frame; 2. cylinder; 3. telescopic shaft; 4. U-shaped push block; 5. support rod; 6. rotating plate; 7. spring; 8. rotating wheel; 9. deceleration plate; 10. push arm; 11. first push rod; 12. first U-shaped vertical plate; 13. first limit plate; 14. rotating rod; 15. sliding sleeve; 16. second push rod; 17. second U-shaped vertical plate; 18. second limit plate. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] See attached Figure 1-4 , an internal rotating shaft brake mechanism of an offshore wind turbine, comprising a mounting frame 1, a cylinder 2 is arranged on the mounting frame 1, a U-shaped push block 4 with two side walls inclined and close to the middle is arranged at the end of the telescopic shaft 3 of the cylinder 2, the middle part of the U-shaped push block 4 is an open cavity, and the two side walls are elastic, a support rod 5 is symmetrically arranged on the mounting frame 1, a rotating plate 6 is rotatably connected to the support rod 5, one side of the rotating plate 6 is connected to one side of the support rod 5 through a spring 7, and one end of the rotating plate 6 is rotatably connected to a rotating wheel 8, the outer wall of the rotating wheel 8 abuts against the inclined side wall of the U-shaped push block 4, and a speed reducer 9 is arranged on the side of the rotating plate 6 away from the rotating wheel 8, and the mounting frame 1 is installed in the cabin of the wind turbine, The symmetrically arranged speed reducers 9 are arranged on both sides of the rotating shaft inside the wind turbine. When decelerating, the cylinder 2 is started, and the telescopic shaft 3 pushes the U-shaped push block 4 to move. At this time, the two inclined side walls of the U-shaped push block 4 push the rotating wheel 8, so that the rotating plate 6 drives the speed reducer 9 to deflect. At this time, the speed reducers 9 on both sides are attached to the outer wall of the rotating shaft. The two side walls of the U-shaped push block 4 are elastic, and the speed reducers 9 on both sides will not be stuck on the outer wall of the rotating shaft. They can only form friction on the rotating shaft to reduce the speed of the rotating shaft, thereby avoiding damage to the wind turbine caused by an emergency stop. The U-shaped push block 4 continues to move forward, and the friction force of the speed reducers 9 on both sides on the fan shaft will gradually increase, which can further improve the deceleration effect.
[0024] In this embodiment, a push arm 10 is provided on the outer wall of the telescopic shaft 3 of the cylinder 2, and a first push rod 11 is provided on the end of the push arm 10 away from the telescopic shaft 3, and a first U-shaped vertical plate 12 is provided on the side of the first push rod 11 away from the push arm 10, and first limit plates 13 are symmetrically provided on both side walls of the first U-shaped vertical plate 12. When the telescopic shaft 3 pushes the U-shaped push block 4, the push arm 10 will also push the first U-shaped vertical plate 12 and the first limit plate 13 through the first push rod 11. When the U-shaped push block 4 continues to move forward, the symmetrically arranged first limit plates 13 will fit onto the outer wall of the rotating shaft. By performing friction deceleration on different positions of the outer wall of the rotating shaft, the deceleration effect can be greatly improved.
[0025] Furthermore, a rotating rod 14 is rotatably connected to the mounting frame 1, and a sliding sleeve 15 is symmetrically and slidably connected to the outer wall of the rotating rod 14. The sliding sleeve 15 on one side is rotatably connected to the first push rod 11, and the sliding sleeve 15 on the other side is rotatably connected to the second push rod 16. A second U-shaped vertical plate 17 is provided at one end of the second push rod 16, and second limiting plates 18 are symmetrically provided on both side walls of the second U-shaped vertical plate 17. When the first push rod 11 pushes the first U-shaped vertical plate 12, the rotating rod 14 deflects and drives the second push rod 16 to move. At this time, the movement direction of the second push rod 16 is opposite to that of the first push rod 11, and the second U-shaped vertical plate 17 further drives the second limiting plate 18. When the U-shaped push block 4 continues to move forward, the symmetrically arranged second limiting plates 18 will fit the outer wall of the rotating shaft. By limiting different positions of the outer wall of the rotating shaft, the deceleration effect can be greatly improved.
[0026] In this embodiment, the side of the first push rod 11 away from the first U-shaped vertical plate 12 is a rectangular structure, and the rectangular structure is slidably connected to the mounting frame 1 to improve the stability of the movement of the first push rod 11.
[0027] In this embodiment, the side of the second push rod 16 away from the second U-shaped vertical plate 17 is a rectangular structure, and the rectangular structure is slidably connected to the mounting frame 1 to improve the stability of the movement of the second push rod 16.
[0028] In this embodiment, both the first limiting plate 13 and the second limiting plate 18 are arc-shaped, and the concave arc-shaped sides of the two are correspondingly arranged, so as to limit the two sides of the rotating shaft at the same time and improve the stability during the deceleration process.
[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An internal shaft brake mechanism for an offshore wind turbine, comprising a mounting frame (1), wherein a cylinder (2) is provided on the mounting frame (1), and wherein: The end of the telescopic shaft (3) of the cylinder (2) is provided with a U-shaped push block (4) whose side walls are inclined and close to the middle. The mounting frame (1) is symmetrically provided with support rods (5). A rotating plate (6) is rotatably connected to the support rod (5). One side of the rotating plate (6) is connected to one side of the support rod (5) through a spring (7). One end of the rotating plate (6) is rotatably connected to a rotating wheel (8). The outer wall of the rotating wheel (8) abuts against the inclined side wall of the U-shaped push block (4). A speed reducer (9) is provided on the side of the rotating plate (6) away from the rotating wheel (8).
2. The internal shaft brake mechanism of an offshore wind turbine according to claim 1, characterized in that: A push arm (10) is provided on the outer wall of the telescopic shaft (3) of the cylinder (2); a first push rod (11) is provided at one end of the push arm (10) away from the telescopic shaft (3); a first U-shaped vertical plate (12) is provided on the side of the first push rod (11) away from the push arm (10); and first limit plates (13) are symmetrically provided on both side walls of the first U-shaped vertical plate (12).
3. The internal shaft brake mechanism of an offshore wind turbine according to claim 2, characterized in that: A rotating rod (14) is rotatably connected to the mounting frame (1), and a sliding sleeve (15) is symmetrically slidably connected to the outer wall of the rotating rod (14). The sliding sleeve (15) is rotatably connected to the first push rod (11) on one side, and a second push rod (16) is rotatably connected to the sliding sleeve (15) on the other side. A second U-shaped vertical plate (17) is provided at one end of the second push rod (16), and second limit plates (18) are symmetrically provided on both side walls of the second U-shaped vertical plate (17).
4. An internal shaft brake mechanism for an offshore wind turbine as claimed in claim 2 or 3, characterized in that: The side of the first push rod (11) away from the first U-shaped vertical plate (12) is in the form of a rectangular structure, and the rectangular structure is slidably connected to the mounting frame (1).
5. The internal shaft brake mechanism of an offshore wind turbine as claimed in claim 3, characterized in that: The side of the second push rod (16) away from the second U-shaped vertical plate (17) is in the form of a rectangular structure, and the rectangular structure is slidably connected to the mounting frame (1).
6. The internal shaft brake mechanism of an offshore wind turbine as claimed in claim 3, characterized in that: The first limiting plate (13) and the second limiting plate (18) are both arc-shaped, and the concave arc-shaped sides of the two are arranged correspondingly.