A caliper mechanism and a wind turbine

Abstract

The utility model provides a kind of calipers mechanism and wind driven generator, calipers mechanism includes first calipers body, bushing, sealing nut, piston, first friction plate, first calipers body is provided with through-hole through;Bushing is sleeved in through-hole;Sealing nut is set in one end of through-hole, sealing nut is abutted in the one side of bushing in the axial direction of bushing, sealing nut is provided with oil inlet channel, oil inlet channel is communicated with the end of bushing close to sealing nut;The one end of piston can be slidably set in the one end of bushing away from sealing nut along the axial direction of bushing;First friction plate can be movably set in the one side of piston away from sealing nut along the axial direction of bushing.The utility model designs bushing of piston separately, so that piston does not need to be directly installed and operated in first calipers body or sealing nut.This design not only guarantees the stable expansion and contraction of hydraulic piston, but also significantly reduces manufacturing cost, and makes processing, maintenance and overhaul more convenient.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a caliper mechanism and a wind turbine. Background Technology

[0002] The yaw system is an indispensable part of a horizontal axis wind turbine generator set, and it mainly undertakes two tasks: first, to work with the unit's control system to ensure that the wind turbine is always facing the wind direction, so as to maximize the utilization of wind energy and improve power generation efficiency; second, to provide reliable locking torque to ensure the safe operation of the unit.

[0003] Caliper brakes in yaw systems are currently classified into three main categories: purely mechanical passive, purely hydraulic active, and hybrid. Mainstream hydraulic or hybrid calipers have an exceptionally complex structure due to the piston being integrated into the lower caliper body, resulting in high costs, manufacturing difficulties, and significant inconvenience in installation and subsequent maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a caliper mechanism and a wind turbine, which aims to solve the problem of the complex structure of existing hydraulic or hybrid calipers.

[0005] To solve the above-mentioned technical problems, the present invention provides a caliper mechanism, comprising:

[0006] A first caliper body, wherein a through hole is provided through the first caliper body;

[0007] A bushing, wherein the bushing is fitted inside the through hole;

[0008] A sealing nut is disposed inside one end of the through hole and abuts against the bushing on one side of the bushing in the axial direction. The sealing nut is provided with an oil inlet channel, which connects to one end of the bushing near the sealing nut.

[0009] A piston, one end of which is slidably disposed within the end of the bushing away from the sealing nut along the axial direction of the bushing;

[0010] A first friction plate is movably disposed along the axial direction of the bushing on the side of the piston away from the sealing nut, so that the piston can drive the first friction plate to move along the axial direction of the bushing.

[0011] In some embodiments, a boss is provided on the surface of the sealing nut near the piston, and the boss is inserted into one end of the bushing near the sealing nut.

[0012] In some embodiments, the piston has a groove on its surface near the sealing nut.

[0013] In some embodiments, the oil inlet channel and the groove are axially opposite to the bushing.

[0014] In some embodiments, an annular stop surface is provided on the inner wall of the through hole, facing the sealing nut, and the annular stop surface abuts against the side of the bushing away from the sealing nut.

[0015] In some embodiments, a pad is provided between the piston and the first friction plate; when the piston is at its first extreme position closest to the sealing nut, at least the portion of the pad closest to the piston is located within the through hole.

[0016] In some embodiments, when the piston is in the second extreme position furthest from the sealing nut, at least the portion of the pad closest to the piston is located within the through hole.

[0017] In some embodiments, when the piston is at its first extreme position closest to the sealing nut, at least the portion of the first friction plate closest to the piston is located within the through hole.

[0018] In some embodiments, the caliper mechanism further includes a second caliper body and a second friction plate, the second caliper body being disposed on the side of the first caliper body in the axial direction of the bushing near the first friction plate, and the second friction plate being disposed on the surface of the second caliper body in the radial direction of the bushing near the first friction plate.

[0019] To achieve the above objectives, this utility model also provides a wind turbine generator, including the aforementioned clamping mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The caliper mechanism of this invention features a separately designed piston bushing, eliminating the need for the piston to be directly installed and operated within the first caliper body or sealing nut. This design ensures stable extension and retraction of the hydraulic piston, significantly reduces manufacturing costs, and simplifies processing, maintenance, and repair. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 This is a schematic diagram of the caliper mechanism in an embodiment of the present invention;

[0024] Figure 2for Figure 1 A schematic diagram of the structure at the through hole.

[0025] Explanation of reference numerals in the accompanying drawings of this utility model:

[0026] Caliper mechanism 100, first caliper body 1, through hole 11, annular stop surface 12, bushing 2, sealing nut 3, oil inlet channel 31, boss 32, piston 4, groove 41, first friction plate 5, pad 6, second caliper body 7, second friction plate 8, oil collection bottle 9.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] This utility model provides a caliper mechanism that can be used in equipment such as wind turbines. The following description will use the application of this caliper mechanism in a wind turbine as an example. Figure 1 and Figure 2 A preferred embodiment of the caliper mechanism provided by this utility model is shown.

[0032] Please see Figure 1 and Figure 2 In some embodiments, the caliper mechanism 100 includes a first caliper body 1, a bushing 2, a sealing nut 3, a piston 4, and a first friction plate 5. The first caliper body 1 has a through hole 11. The bushing 2 is fitted inside the through hole 11. The sealing nut 3 is disposed inside one end of the through hole 11 and abuts against the side of the bushing 2 in the axial direction. The sealing nut 3 has an oil inlet channel 31 that connects to the end of the bushing 2 near the sealing nut 3. One end of the piston 4 is slidably disposed in the end of the bushing 2 away from the sealing nut 3. The first friction plate 5 is movably disposed in the side of the piston 4 away from the sealing nut 3 in the axial direction of the bushing 2, so that the piston 4 drives the first friction plate 5 to move in the axial direction of the bushing 2.

[0033] Specifically, the caliper mechanism 100 can be a hydraulic caliper or a hybrid caliper. The following description will take the caliper mechanism 100 as a hybrid caliper as an example. The caliper mechanism 100 includes an upper caliper body and a lower caliper body. The first caliper body 1 can be an upper caliper body or a lower caliper body. The following description will take the first caliper body 1 as a lower caliper body as an example.

[0034] A through hole 11 is provided vertically through the first caliper body 1. The bushing 2 is cylindrically arranged extending vertically, and the shape of the bushing 2 is adapted to the shape of the through hole 11 so that the bushing 2 can be fitted into the through hole 11. For example, please refer to... Figure 1 and Figure 2 In some embodiments, the bushing 2 is cylindrical and the through hole 11 is a circular hole.

[0035] The lower end of piston 4 is slidably disposed within bushing 2. Sealing nut 3 is disposed within the lower end of through hole 11. The inner wall of the lower end of through hole 11 has a threaded structure that engages with the threaded portion of sealing nut 3, thereby fixing sealing nut 3 within the lower end of through hole 11. Sealing nut 3 also abuts against the lower side of bushing 2. Sealing nut 3 serves to fix the lower end and axially position piston 4 and bushing 2.

[0036] The sealing nut 3 is provided with an oil inlet channel 31. One end of the oil inlet channel 31 penetrates the lower surface of the sealing nut 3 to form an oil inlet on the lower surface of the sealing nut 3, and the other end of the oil inlet channel 31 penetrates the upper surface of the sealing nut 3 to form an oil outlet on the upper surface of the sealing nut 3. The oil outlet of the oil inlet channel 31 is vertically opposite to the piston 4. Thus, the sealing nut 3 can serve as an installation port for a hydraulic pipeline (not shown in the figure). The hydraulic pipeline is connected to the lower side of the sealing nut 3, and hydraulic oil passes through the oil inlet channel 31 in the center of the sealing nut 3 to reach the piston 4, thereby pushing the piston 4 to move upward. The piston 4 acts as the actuator of the caliper mechanism 100. When the hydraulic system is pressurized and the hydraulic oil flows, the piston 4 extends upward to push the first friction plate 5 against the gear ring, thereby pressurizing and clamping the gear ring to ensure that the engine compartment does not slip. When yaw is required, the hydraulic system is depressurized, and the piston 4 retracts downward to release the braking force. The specific shape and style of the oil inlet channel 31 can be set according to the actual situation. For example, please refer to [link / reference]. Figure 1 and Figure 2 In some embodiments, the oil inlet channel 31 is arranged to extend in the vertical direction.

[0037] The bushing 2 is separate from the sealing nut 3 below. The bushing 2 is designed separately to provide a channel for the movement of the piston 4 in the first caliper body 1. Because the operation of the hydraulic piston 4 requires the relative moving parts (bushel 2) to ensure a precise surface roughness, so as to prevent the piston 4 from being worn due to high-frequency extension and retraction, resulting in iron filings and oil leakage. The separate bushing 2 design eliminates the need to place the piston 4 directly in the first caliper body 1 or the irregular nut, which greatly reduces the processing cost and makes installation, maintenance and disassembly simpler.

[0038] The caliper mechanism 100 of this invention features a separately designed bushing 2 for the piston 4, eliminating the need for the piston 4 to be directly installed and operated within the first caliper body 1 or the sealing nut 3. This design ensures stable extension and retraction of the hydraulic piston 4, significantly reduces manufacturing costs, and simplifies processing, maintenance, and repair.

[0039] The upper surface of the sealing nut 3 abuts against the lower end face of the bushing 2, allowing the sealing nut 3 to position the bushing 2 vertically. Optionally, please refer to... Figure 1 and Figure 2 In some embodiments, a boss 32 is provided on the surface of the sealing nut 3 near the piston 4, and the boss 32 is inserted into the end of the bushing 2 near the sealing nut 3.

[0040] Specifically, the upper surface of the sealing nut 3 has an upward-facing protrusion 32, which is located in the middle of the sealing nut 3 and extends into the lower end of the bushing 2. The shape of the protrusion 32 is usually adapted to the shape of the bushing 2. Thus, the installation and positioning of the sealing nut 3 and the bushing 2 can be achieved through the insertion and engagement between the protrusion 32 and the bushing 2. The oil outlet of the oil inlet channel 31 is located on the protrusion 32.

[0041] The sealing nut 3 can be machined directly from a very small piece of bar stock, while the bushing 2 can be machined directly from ordinary tubing. This differs from existing technologies that require the sealing nut to be machined into an irregularly shaped structure, which not only needs to be threaded to the lower caliper body but also requires the machining of a very precise large hole as a passage for piston movement, thus resulting in material waste.

[0042] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, an annular stop surface 12 facing the sealing nut 3 is provided on the inner wall of the through hole 11, and the annular stop surface 12 abuts against the side of the bushing 2 away from the sealing nut 3.

[0043] Specifically, a downward-facing annular stop surface 12 is provided on the inner wall of the through hole 11. The annular stop surface 12 is located on the upper side of the bushing 2 and abuts against the upper end surface of the bushing 2 from top to bottom, so as to position the bushing 2 from top to bottom by the sealing nut 3 and the annular stop surface 12.

[0044] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, the piston 4 has a groove 41 on its surface near the sealing nut 3.

[0045] Specifically, a groove 41 with the opening facing downward is provided on the lower surface of the piston 4. Thus, providing a groove 41 on the lower surface of the piston 4 can increase the force-bearing area of ​​the piston 4.

[0046] Further, please refer to Figure 1 and Figure 2 In some embodiments, the oil inlet channel 31 and the groove 41 are axially opposite to each other on the bushing 2. The oil outlet of the oil inlet channel 31 is vertically opposite to the groove 41 on the piston 4, which facilitates the entry of hydraulic oil into the groove 41 to increase the effective force-bearing area of ​​the piston 4.

[0047] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, a pad 6 is provided between the piston 4 and the first friction plate 5.

[0048] Specifically, the pad 6 is fixedly disposed between the piston 4 and the first friction plate 5, the lower surface of the pad 6 is fixedly connected to the upper surface of the piston 4, and the upper surface of the pad 6 is fixedly connected to the lower surface of the first friction plate 5.

[0049] The first friction plate 5 is the part between the pad 6 and the gear ring. Due to the special material properties of the first friction plate 5 and the characteristics of the hydraulic caliper, it will always provide a certain friction force against the gear ring, but it will not generate too much friction force to prevent yaw. A pad 6 is designed between the piston 4 and the first friction plate 5. During yaw, the upper first friction plate 5 needs to press against the gear ring due to the yaw back pressure. Inevitably, some friction debris, iron filings, grease, etc., from the first friction plate 5 will fall to the lower part. If these debris and impurities enter the hydraulic piston 4, it will cause a risk to the operation of the piston 4, thereby endangering the life of the caliper mechanism 100. Therefore, a pad 6 is designed between the piston 4 and the first friction plate 5 to block the falling debris and impurities.

[0050] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, when the piston 4 is in the first extreme position closest to the sealing nut 3, at least the portion of the pad 6 closest to the piston 4 is located within the through hole 11.

[0051] Specifically, when the piston 4 retracts to its lower limit position, the lower end of the pad 6 or the entire pad 6 is located inside the through hole 11, and the shape of the pad 6 matches the shape of the through hole 11, so that the pad 6 can effectively block the falling debris and foreign objects from above.

[0052] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, when the piston 4 is in the second extreme position furthest from the sealing nut 3, at least the portion of the pad 6 closest to the piston 4 is located within the through hole 11.

[0053] Specifically, when the piston 4 extends upward to its upper limit position, the lower end of the pad 6 or the entire pad 6 is located inside the through hole 11, so that the pad 6 can effectively block the falling debris and foreign objects from above.

[0054] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, when the piston 4 is in the first extreme position closest to the sealing nut 3, at least the portion of the first friction plate 5 closest to the piston 4 is located within the through hole 11.

[0055] Specifically, when the piston 4 retracts downward to its lower limit position, the lower end of the first friction plate 5 is located inside the through hole 11, and the shape of the first friction plate 5 is adapted to the shape of the through hole 11.

[0056] The caliper mechanism 100 typically requires distributed design of sealing rings and guide rings to facilitate the operation of the piston 4 and prevent hydraulic oil leakage. Optionally, in some embodiments, an O-ring (not shown in the figure) is provided at the sealing nut 3 to form a static seal structure.

[0057] Optionally, in some embodiments, a dynamic sealing structure (not shown in the figures) is provided at the piston 4 and / or the gasket 6. The dynamic sealing structure includes a Glyd ring and two guide rings, with the Glyd ring located between the two guide rings. Providing a dynamic sealing structure at the gasket 6 not only provides double protection against hydraulic oil leakage but also prevents friction plate debris and grease from falling into the piston 4, thus ensuring the stable operation of the caliper mechanism 100.

[0058] When installing the hydraulic caliper inside the first caliper body 1, the bushing 2 and piston 4 can be placed inside the first caliper body 1 first, and then the sealing nut 3 below can be screwed into the first caliper body 1. After that, the pad 6 and the first friction plate 5 can be installed. Disassembly is the same. When the hydraulic piston 4 is stuck or there is a problem with the seal, the sealing nut 3 below can be screwed out directly, and the piston 4 can be taken out directly, which is very convenient for inspection and maintenance.

[0059] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, the caliper mechanism 100 further includes a second caliper body 7 and a second friction plate 8. The second caliper body 7 is disposed on the side of the first caliper body 1 in the axial direction of the bushing 2 close to the first friction plate 5, and the second friction plate 8 is disposed on the surface of the second caliper body 7 in the radial direction of the bushing 2 close to the first friction plate 5.

[0060] Specifically, the second caliper body 7 is an upper caliper body, which is disposed on the upper surface of the first caliper body 1, and the through hole 11 is located on the horizontally upward side of the second caliper body 7. The second friction plate 8 is disposed on the horizontal side of the second caliper body 7 near the through hole 11.

[0061] Optionally, please refer to Figure 1 and Figure 2 In some embodiments, the caliper mechanism 100 further includes an oil collection bottle 9, which is connected to the first caliper body 1. The oil collection bottle 9 can collect the small amount of hydraulic oil exposed after the seal of the caliper mechanism 100 fails during long-term operation.

[0062] This utility model also provides a wind turbine generator, which includes a caliper mechanism. Since the caliper mechanism adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0063] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A caliper mechanism, characterized in that, include: A first caliper body, wherein a through hole is provided through the first caliper body; A bushing, wherein the bushing is fitted inside the through hole; A sealing nut is disposed inside one end of the through hole and abuts against the bushing on one side of the bushing in the axial direction. The sealing nut is provided with an oil inlet channel, which connects to one end of the bushing near the sealing nut. A piston, one end of which is slidably disposed within the end of the bushing away from the sealing nut along the axial direction of the bushing; A first friction plate is movably disposed along the axial direction of the bushing on the side of the piston away from the sealing nut, so that the piston can drive the first friction plate to move along the axial direction of the bushing.

2. The caliper mechanism according to claim 1, characterized in that, The sealing nut has a protruding boss on its surface near the piston, and the boss is inserted into the end of the bushing near the sealing nut.

3. The caliper mechanism according to claim 1, characterized in that, The piston has a groove on its surface near the sealing nut.

4. The caliper mechanism according to claim 3, characterized in that, The oil inlet channel and the groove are axially opposite to each other on the bushing.

5. The caliper mechanism according to claim 1, characterized in that, The inner wall of the through hole is provided with an annular stop surface facing the sealing nut, and the annular stop surface abuts against the side of the bushing away from the sealing nut.

6. The caliper mechanism according to claim 1, characterized in that, A pad is provided between the piston and the first friction plate; when the piston is at its first extreme position closest to the sealing nut, at least the portion of the pad closest to the piston is located within the through hole.

7. The caliper mechanism according to claim 6, characterized in that, When the piston is in its second extreme position furthest from the sealing nut, at least the portion of the gasket closest to the piston is located within the through hole.

8. The caliper mechanism according to claim 1, characterized in that, When the piston is in its first extreme position closest to the sealing nut, at least the portion of the first friction plate closest to the piston is located within the through hole.

9. The caliper mechanism according to claim 1, characterized in that, The caliper mechanism further includes a second caliper body and a second friction plate. The second caliper body is disposed on the side of the first caliper body in the axial direction of the bushing, close to the first friction plate. The second friction plate is disposed on the surface of the second caliper body in the radial direction of the bushing, close to the first friction plate.

10. A wind turbine generator, characterized in that, Includes the caliper mechanism as described in any one of claims 1-9.

Images