Oil extraction device for yaw variable pitch bearing of wind driven generator
By designing an oil collection device suitable for the yaw and pitch bearings of wind turbines, the problem of low lubricating grease cleaning efficiency was solved, achieving efficient and convenient lubricating grease collection and storage, simplifying the maintenance process, and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-03
AI Technical Summary
In the existing technology, the cleaning efficiency of lubricating grease in the yaw and pitch bearings of wind turbines is low, requiring multiple operations to meet the cleaning requirements, resulting in low work efficiency.
An oil collection device for yaw and pitch bearings of wind turbines has been designed, including a collection pipe section, an adjustment pipe section, and a handheld pipe section. It has an oil collection chamber and an oil collection port, which can continuously collect and store lubricating grease. It is adaptable to yaw and pitch bearings of different sizes and shapes, and uses a scraper to assist in scraping the lubricating grease, simplifying the operation process.
It improves the cleaning efficiency of lubricating grease, reduces oil collection time, simplifies the maintenance process, avoids the harm to maintenance personnel caused by high temperature and high pressure, and enhances the applicability and ease of operation of the device.
Smart Images
Figure CN223965245U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind turbine technology, and more specifically to an oil sampling device for the yaw and pitch bearing of a wind turbine. Background Technology
[0002] A wind turbine's yaw system is a structure that drives the wind turbine to face the prevailing wind direction. It typically consists of a yaw pitch bearing, a yaw drive unit, a yaw brake, a yaw counter, a cable protection device, and a yaw hydraulic circuit.
[0003] Yaw bearings require a large amount of lubricating grease for sealing and lubrication during operation. Because this grease has a certain degree of fluidity, it may drip or flow onto the surface of other equipment during the operation of the yaw and pitch bearings, thus requiring timely cleaning. The traditional method for collecting lubricating grease is to insert a steel wire into the oil sampling point of the yaw and pitch bearing, such as the oil collection bottle connection pipe or oil outlet, and dip it into the grease inside. The grease adhering to the steel wire is then scraped onto a storage container.
[0004] However, in practical applications, it was found that the surface of the steel wire is relatively smooth, and only a small amount of lubricating grease can be adhered by a single dip. Multiple operations are required to meet the requirements for cleaning the lubricating grease, resulting in low work efficiency. Utility Model Content
[0005] In view of this, the present invention provides an oil sampling device for the yaw and pitch bearing of a wind turbine generator to solve the problem of low efficiency in removing lubricating grease from the inside of the yaw and pitch bearing.
[0006] Specifically, the present invention provides an oil sampling device for a yaw and pitch bearing of a wind turbine, comprising a collection pipe section for extending into the oil sampling part of the yaw and pitch bearing, the collection pipe section having an oil collecting chamber and an oil sampling port opened in the oil collecting chamber.
[0007] Beneficial effects: By using a collection pipe section equipped with an oil collecting chamber and an oil outlet, the collected lubricating grease is allowed to enter the oil collecting chamber for storage as the collection pipe section extends into the oil taking part of the yaw and pitch bearing. Compared to existing solutions, this oil taking device can continuously collect and extract oil, and its storage space is relatively large, allowing for quick and efficient removal of lubricating grease, reducing the time spent on oil extraction, and thus improving the efficiency of lubricating grease cleaning.
[0008] In one alternative embodiment, the oil sampling device for the yaw pitch bearing of a wind turbine further includes an adjusting pipe section connected to the collecting pipe section, and the adjusting pipe section is axially extendable and axially flexible.
[0009] Beneficial effects: By adding an adjustable pipe section connected to the collection pipe section, and allowing the adjustable pipe section to extend and contract axially and bend relative to the axial direction, the oil extraction device can be flexibly adjusted to cope with yaw and pitch bearings of different sizes and shapes, as well as the presence of obstacles. This allows the collection pipe section to be driven quickly to the working position, enabling the oil extraction device to adapt to different needs and thus increasing its applicability. Furthermore, using this collection device structure, maintenance tasks can be completed simply by adjusting the length and angle of the pipe section, without disassembling too many components, reducing unnecessary steps and simplifying the entire maintenance process.
[0010] In one alternative embodiment, the oil sampling device for the yaw and pitch bearing of a wind turbine further includes a handheld pipe section disposed at the end of the regulating pipe section away from the collecting pipe section.
[0011] Beneficial effects: By adding a handheld pipe section, maintenance personnel can easily hold and operate the oil extraction device. Furthermore, by placing the handheld pipe section at the end of the regulating pipe section away from the collecting pipe section, the maintenance personnel maintain an appropriate distance from the equipment, avoiding excessive physical contact with the mechanical equipment and preventing injury to maintenance personnel from special working conditions such as high temperature and high pressure.
[0012] In one optional embodiment, the handheld pipe section and the regulating pipe section are provided with an oil delivery chamber, the inlet end of the oil delivery chamber is located in the regulating pipe section and communicates with the oil collection chamber, and the outlet end of the oil delivery chamber is located in the handheld pipe section.
[0013] Beneficial effects: By providing oil delivery chambers inside both the handheld pipe section and the regulating pipe section, the entire oil extraction device is designed as an integrated unit, simplifying its overall structure. Furthermore, by placing the inlet of the oil delivery chamber in the regulating pipe section and connecting it to the oil collection chamber, and placing the outlet of the oil delivery chamber in the handheld pipe section, the lubricating grease stored in the oil collection chamber can be transferred to the regulating pipe section and the handheld pipe section. This allows maintenance personnel to directly control the extraction and discharge of lubricating grease without changing the tool's posture.
[0014] In one alternative embodiment, the oil sampling device for the yaw and pitch bearing of a wind turbine further includes a transition pipe section disposed between the handheld pipe section and the regulating pipe section, and the transition pipe section has an oil delivery chamber inside.
[0015] In one alternative embodiment, the oil inlet is a top opening in the oil collecting chamber, and the top opening extends axially.
[0016] Beneficial effects: By providing an oil outlet at the top of the oil collecting chamber and extending the outlet along the axial direction, it is easier for lubricating grease to be collected into the oil collecting chamber, thereby reducing the difficulty of oil collection and reducing the time cost of oil collection.
[0017] In one alternative embodiment, the cross-section of the collection pipe section is C-shaped or U-shaped.
[0018] Beneficial effects: By making the cross-section of the collection pipe section C-shaped or U-shaped, giving it a certain curvature, when the collection pipe section is driven to rotate by external force directly or indirectly, the inner wall at the top opening of the oil collection chamber can continuously scrape the lubricating grease, which helps to reduce the resistance to collecting the lubricating grease and makes the lubricating grease be collected smoothly.
[0019] In one optional embodiment, the end of the collecting pipe section that is axially opposite to the regulating pipe section has a side opening; the collecting pipe section also includes an oil scraper, which is installed at the side opening to seal it.
[0020] Beneficial effect: By setting a side opening at the end of the collecting pipe away from the regulating pipe section along the axial direction, and installing an oil scraper to block it at the side opening, it is convenient to scrape the lubricating grease.
[0021] In one alternative implementation, the projection of the scraper blade completely covers the projection of the side opening in cross-section.
[0022] Beneficial effects: By completely covering the projection of the side opening in the cross-section with the projection of the scraper blade in the cross-section, it is easy to completely seal the side opening, making it convenient to collect the scraped lubricating grease into the oil collection chamber. At the same time, it can also improve the phenomenon of lubricating grease falling and flowing back into the oil collection chamber, so that the collected lubricating grease will not be easily lost.
[0023] In one alternative embodiment, the axial direction of the handheld tube segment intersects the axial direction of the collection tube segment.
[0024] Beneficial effects: By setting the axis of the handheld tube segment to intersect with the axis of the collection tube segment, the positional relationship between the handheld tube segment and the collection tube segment can be optimized, allowing maintenance personnel to maintain a more natural hand posture during long-term operations, reducing pressure and fatigue in the wrist, arm, and even shoulder, and helping to improve the operating experience of maintenance personnel. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0026] Figure 1A schematic diagram of the oil sampling device for the yaw pitch bearing of a wind turbine provided by this utility model;
[0027] Figure 2 for Figure 1 Cross-sectional schematic diagram of the collection pipe section;
[0028] Figure 3 This is a schematic diagram of the oil sampling device for the yaw and pitch bearing of a wind turbine provided by this utility model during the forming process.
[0029] Figure 4 This is a schematic diagram of the oil sampling device for the yaw and pitch bearing of a wind turbine generator, provided by this utility model, during the molding process.
[0030] Explanation of reference numerals in the attached figures:
[0031] 1. Collection pipe section; 11. Oil collection chamber; 12. Oil inlet; 13. Oil scraper;
[0032] 2. Regulating pipe section;
[0033] 3. Handheld pipe section; 31. Oil delivery chamber;
[0034] 4. Transition pipe section. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0036] In the description of this utility model, it should be noted that the terms "upper", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation 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.
[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0038] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0039] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.
[0040] According to an embodiment of the present invention, an oil sampling device for a yaw pitch bearing of a wind turbine generator is provided.
[0041] like Figure 1 As shown, the oil sampling device includes at least a collection pipe section 1, which is used to extend into the oil sampling part of the yaw pitch bearing.
[0042] Specifically, the collection pipe section 1 is provided with an oil collecting chamber 11 and an oil inlet 12 opened in the oil collecting chamber 11.
[0043] With this configuration, the collected lubricating grease is stored in the oil collection chamber 11 through the oil collection port 12 as the collection pipe section 1 extends into the oil collection part of the yaw pitch bearing.
[0044] Compared to existing solutions, the oil collection device in this structure can continuously collect and store lubricating grease, and its storage space is relatively large. It can quickly and efficiently remove lubricating grease, reducing the time spent on oil collection and thus improving the efficiency of cleaning lubricating grease.
[0045] At the same time, by quickly and effectively collecting old grease, the amount of residual lubricating grease in the yaw and pitch bearings can be reduced, minimizing interference with the newly added lubricating grease and thus ensuring the lubrication effect of the new grease.
[0046] It can be noted that, to facilitate timely adjustment of the oil extraction device's posture and position, in one embodiment, such as... Figure 1 As shown, the oil sampling device for the yaw pitch bearing of a wind turbine also includes an adjusting pipe section 2, which is connected to the collecting pipe section 1, and the adjusting pipe section 2 can extend and retract along the axial direction and bend and rotate relative to the axial direction.
[0047] With this configuration, by adding an adjusting pipe section 2 connected to the collection pipe section 1, and allowing the adjusting pipe section 2 to extend and retract along the axial direction and bend relative to the axial direction, the oil extraction device can be flexibly adjusted to cope with yaw and pitch bearings of different sizes and shapes, as well as the presence of obstacles. This allows the collection pipe section 1 to be driven to the working position quickly, enabling the oil extraction device to adapt to different needs and thus increasing its applicability.
[0048] Meanwhile, using the collection device with this structure, maintenance tasks can be carried out simply by adjusting the length and angle of the pipe section, without disassembling too many components, reducing unnecessary steps, and thus simplifying the entire maintenance process.
[0049] Preferably, the regulating pipe section 2 includes several expansion joints that are rotatably connected in sequence, and in any two adjacent expansion joints, the expansion joints can rotate relative to the axial direction.
[0050] It can be explained that, in order to reduce the difficulty of operation for maintenance personnel, such as Figure 1 As shown, in one embodiment, the oil sampling device for the yaw pitch bearing of a wind turbine further includes a handheld pipe section 3, which is disposed at the end of the regulating pipe section 2 away from the collecting pipe section 1.
[0051] This configuration, by adding a handheld pipe section 3, allows maintenance personnel to easily hold and operate the oil extraction device. Furthermore, by placing the handheld pipe section 3 at the end of the regulating pipe section 2 away from the collecting pipe section 1, it ensures that maintenance personnel maintain an appropriate distance from the equipment, preventing their bodies from getting too close to the mechanical equipment and thus avoiding injury to maintenance personnel from special working conditions such as high temperature and high pressure.
[0052] It should be noted that, in order to improve the ability of the oil collection device to collect lubricating grease, for example, by increasing the volume of lubricating grease collected, such as... Figure 1 As shown, in one embodiment, the handheld pipe section 3 and the regulating pipe section 2 are provided with an oil delivery chamber 31. The inlet end of the oil delivery chamber 31 is located in the regulating pipe section 2 and communicates with the oil collection chamber 11. The outlet end of the oil delivery chamber 31 is located in the handheld pipe section 3.
[0053] With this configuration, by providing oil delivery chambers 31 inside both the handheld pipe section 3 and the regulating pipe section 2, the entire oil extraction device becomes an integrated design, simplifying its overall structure. Furthermore, by placing the inlet end of the oil delivery chamber 31 in the regulating pipe section 2 and connecting it to the oil collection chamber 11, and placing the outlet end of the oil delivery chamber 31 in the handheld pipe section 3, the lubricating grease stored in the oil collection chamber 11 can be transferred to the regulating pipe section 2 and the handheld pipe section 3. This allows maintenance personnel to directly control the extraction and discharge of lubricating grease without changing the tool's posture.
[0054] In one embodiment, the oil sampling device for the yaw and pitch bearing of a wind turbine further includes a transition pipe section 4, which is disposed between the handheld pipe section 3 and the regulating pipe section 2, and the transition pipe section 4 is provided with an oil delivery chamber 31 inside.
[0055] It should be noted that in this application, the location of the oil inlet 12 is not specifically limited, but only needs to be capable of collecting the lubricating grease from the oil inlet of the yaw and pitch bearing.
[0056] For example, the oil inlet 12 is located at least at one of the top, side, or bottom of the collection pipe section 1.
[0057] Preferably, an oil extraction port 12 is provided.
[0058] Furthermore, such as Figure 1 As shown, the oil inlet 12 is an opening at the top of the oil collecting chamber 11, and the top opening extends along the axial direction, making it a long strip-shaped opening receiving groove.
[0059] With this configuration, by providing an oil outlet 12 at the top of the oil collection chamber 11 and extending the oil outlet 12 along the axial direction, it is easy for lubricating grease to be collected into the oil collection chamber 11, thereby reducing the difficulty of oil collection and reducing the time cost of oil collection.
[0060] It should be noted that in this application, the shape of the oil inlet 12 is not specifically limited, as long as it has the ability to collect lubricating grease from the oil inlet of the yaw pitch bearing.
[0061] In one embodiment, the cross-section of the collecting pipe section 1 is C-shaped or U-shaped.
[0062] With this configuration, by making the cross-section of the collection pipe section 1 C-shaped or U-shaped, giving it a certain curvature, when the external force directly or indirectly drives the collection pipe section 1 to rotate, the inner wall at the top opening of the oil collection chamber 11 can continuously scrape the lubricating grease, which helps to reduce the resistance to collecting the lubricating grease and allows the lubricating grease to be collected smoothly.
[0063] Preferred, such as Figure 2 As shown, the cross-section of collection pipe section 1 is C-shaped.
[0064] In one embodiment, the end of the collecting pipe section 1 that faces away from the regulating pipe section 2 along the axial direction is a side opening; such as Figure 2 As shown, the collection pipe section 1 is also equipped with an oil scraper 13, which is installed at the side opening to seal it. In this case, the oil scraper 13 is used to assist in scraping lubricating grease.
[0065] With this configuration, the end of the collecting pipe that is axially opposite to the regulating pipe section 2 is provided with a side opening, and an oil scraper 13 is installed at the side opening to block it, so as to facilitate the scraping of lubricating grease.
[0066] It should be noted that in this application, the area of the scraper blade 13 in radial projection is not specifically limited, but only that it has the ability to completely block the side opening.
[0067] For example, in cross-section, the projection of the scraper 13 completely covers the projection of the side opening.
[0068] This configuration allows the side opening to be completely sealed by the projection of the scraper blade 13 in its cross-section, making it easy to recover the scraped lubricating grease into the oil collection chamber 11.
[0069] At the same time, it can also improve the phenomenon of lubricating grease falling and flowing back in the oil collection chamber 11, so that the collected lubricating grease will not be easily lost.
[0070] Preferred, such as Figure 1 As shown, the projected area of the scraper 13 completely covers the projected area of the side opening, and the scraper 13 is preferably circular, with its radial dimension matching the radial dimension of the collection pipe section 1.
[0071] With this configuration, when the collection pipe section 1 is retracted axially, the scraper 13 can be axially limited to prevent the lubricating grease within the collection pipe section 1 from falling or flowing back.
[0072] It should be noted that this application does not specifically limit the overall structure of the oil extraction device.
[0073] For example, it can be in a straight line or an L-shape.
[0074] Preferred, such as Figure 1 , Figure 2 and Figure 4 As shown, the axial direction of the handheld tube section 3 intersects with the axial direction of the collection tube section 1.
[0075] This configuration, by having the axis of the handheld tube segment 3 intersect with the axis of the collection tube segment 1, optimizes the positional relationship between the handheld tube segment 3 and the collection tube segment 1. This allows maintenance personnel to maintain a more natural hand posture during long-term operations, reducing pressure and fatigue in the wrists, arms, and even shoulders, and helps improve the operational experience for maintenance personnel.
[0076] It should be noted that there are no specific restrictions on the material of the oil extraction device as a whole.
[0077] For example, the entire oil extraction device is made of copper tubing.
[0078] This setting allows for more accurate sampling and testing results after oil samples are stored.
[0079] It can be explained that the manufacturing process of the oil sampling device used for the yaw and pitch bearing of a wind turbine is as follows: A copper tube, such as one with a length of 210mm, an outer diameter of 11mm, and a wall thickness of 0.5mm, is taken out. The adjusting section 2 of the copper tube is then processed into a telescopic and flexible form; preferably, it can be bent 360°. Figure 3 The structure shown is then processed by filing the collecting pipe section 1 to form a top opening and an oil scraper 13. Figure 4 As shown in the diagram, during this process, the scraper blade 13 should be connected to the side opening and should not be separated, with a connection length of at least 3mm; then the scraper blade 13 is polished to make it have a circular structure.
[0080] In addition, the process of collecting lubricating grease using the oil sampling device for the yaw and pitch bearings of wind turbines is as follows:
[0081] (1) Stop the wind turbine generator set, feather the three blades so that the yaw pitch bearing to be greased is on top, and lock the wind turbine in a Y-shaped position.
[0082] (2) Select the oil collection point, for example, select the oil outlet within a 30° area to the left and right of the central axis of the transmission chain, and clean the grease around the oil collection point with a rag.
[0083] (3) Use a wrench such as an Allen wrench to remove the oil collection bottle connecting pipe or the plug of the oil outlet, such as an M16 or M14 plug, and open the oil outlet.
[0084] (4) Insert the collection tube 1 of the oil extraction device completely into the oil outlet hole. If necessary, adjust the regulating tube 2 to adjust the oil extraction posture. If the length of the regulating tube 2 does not meet the requirements, the transition tube 4 can be inserted further, and the hand tube 3 can be rotated, for example, three times.
[0085] (5) Slowly pull out the copper tube, use a cotton swab (or a non-metallic material such as a piece of wood) to scrape off the lubricating grease inside the tube, and store it in a sampling bottle.
[0086] (6) Change the oil extraction point and extract oil again according to the oil extraction process from (1) to (5).
[0087] (7) After taking lubricating grease from this part once, you can manually rotate the paddle about 5° and use the oil taking device to go deep into the oil outlet to collect lubricating grease again until the amount of oil collected reaches more than 15ml. After collecting the lubricating grease, put it back into the oil collection bottle or the oil outlet plug. It should be noted that the number of times to collect lubricating grease from the same location should not exceed 3 times.
[0088] (8) After the oil extraction is completed, ensure that the maintenance personnel return to a safe area before unlocking the wind turbine and resuming unit operation.
[0089] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. An oil sampling device for the yaw and pitch bearing of a wind turbine generator, characterized in that, include: Collection pipe section (1), the collection pipe section (1) is used to extend into the oil intake part of the yaw pitch bearing, the collection pipe section (1) is provided with an oil collection chamber (11) and an oil intake port (12) opened in the oil collection chamber (11), the oil intake port (12) is an opening at the top of the oil collection chamber (11), and the top opening extends along the axial direction; An adjusting pipe section (2) is connected to the collecting pipe section (1), and the adjusting pipe section (2) is axially extendable and axially flexible. The cross-section of the collecting pipe section (1) is C-shaped or U-shaped; The end of the collecting pipe section (1) that is axially opposite to the regulating pipe section (2) is a side opening; The collection pipe section (1) also includes an oil scraper (13), which is installed at the side opening to seal the side opening; The oil inlet (12) has a long, narrow opening.
2. The oil sampling device for the yaw and pitch bearing of a wind turbine generator according to claim 1, characterized in that, Also includes: Handheld tube section (3), which is located at the end of the regulating tube section (2) away from the collecting tube section (1).
3. The oil sampling device for the yaw and pitch bearing of a wind turbine generator according to claim 2, characterized in that, The handheld pipe section (3) and the regulating pipe section (2) are provided with an oil delivery chamber (31). The inlet end of the oil delivery chamber (31) is located in the regulating pipe section (2) and is connected to the oil collection chamber (11). The outlet end of the oil delivery chamber (31) is located in the handheld pipe section (3).
4. The oil sampling device for the yaw and pitch bearing of a wind turbine generator according to claim 3, characterized in that, Also includes: The transition pipe section (4) is located between the handheld pipe section (3) and the regulating pipe section (2), and the transition pipe section (4) is provided with an oil delivery chamber (31).
5. The oil sampling device for the yaw and pitch bearing of a wind turbine generator according to claim 1, characterized in that, In cross-section, the projection of the scraper (13) completely covers the projection of the side opening.
6. The oil sampling device for the yaw and pitch bearing of a wind turbine generator according to any one of claims 2-4, characterized in that, The axial direction of the handheld tube section (3) is intersected with the axial direction of the collection tube section (1).