Lubricating disc structure of wind power gear box

Abstract

The utility model relates to the technical field of wind power gear boxes, in particular to a lubricating disc structure of a wind power gear box, which comprises a first-stage planet carrier, a second-stage planet carrier and a lubricating disc positioned between the first-stage planet carrier and the second-stage planet carrier, the lubricating disc comprises a base body, the base body is fixed to the end face of the second-stage planet carrier, a wear-resistant coating is attached to the peripheral face of the end, away from the second-stage planet carrier, of the base body, and the wear-resistant coating is sleeved with the first-stage planet carrier. According to the scheme, the abrasion-resistant coating is attached to the lubricating disc, the problem that an existing lubricating disc of a copper ring structure is prone to deformation and the wriggling risk can be avoided, the lubricating effect of the lubricating disc is guaranteed, the service life of the lubricating disc is prolonged, meanwhile, the tooth surface abrasion and tooth breaking risk during meshing of planetary gears can be reduced, and the service life of the gears is prolonged; and the operation reliability of the risk gearbox is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine gearboxes, specifically to a lubrication disc structure for a wind turbine gearbox. Background Technology

[0002] In wind power generation systems, the wind turbine gearbox is one of the core components, and its stable and reliable operation plays a crucial role in the performance and efficiency of the entire power generation system. The wind turbine gearbox contains numerous high-speed rotating gears and bearings that bear enormous loads. These components generate a significant amount of friction and heat during operation. Therefore, a lubrication system is required in the wind turbine gearbox to provide lubrication and cooling for the components, ensuring the stable and reliable operation of the gears and bearings.

[0003] In multi-stage planetary gearboxes, due to the different rotational speeds of the planetary gear trains, lubrication discs are typically installed between planetary carriers operating at different speeds to achieve lubrication. These lubrication discs not only reduce rotational wear between components operating at different speeds but also connect the oil passages of these components, thus precisely guiding the lubricating oil to the surfaces of the gears and bearings at each stage within the gearbox. This ensures adequate lubrication during high-speed operation, reducing the coefficient of friction, minimizing wear, and extending the service life of the components. For example, the existing technology "Oil Circuit Lubrication Structure for Planetary Gear Trains and Wind Turbine Gearbox" (Publication No.: CN117847195A) uses an oil guiding structure between two planetary carriers. This structure includes an oil guiding block, which is annular in shape and made of wear-resistant materials such as nylon or copper. The oil guiding holes on the block connect the oil passages between the two planetary carriers, thereby enabling the transfer of lubricating oil. However, the existing technology still has the following technical problems:

[0004] 1. Existing oil guide blocks are made of copper or nylon, which are relatively soft. This means that the shape of the copper ring can be deformed by cutting forces during machining or external forces during assembly, making it difficult to guarantee its precision. Once the precision of the lubrication disc deviates, the oil circuit cannot be accurately converted, directly affecting the lubrication effect inside the gearbox and reducing the overall operational stability of the wind turbine gearbox.

[0005] 2. The high cost of copper materials increases the manufacturing cost of wind turbine gearboxes. In large-scale wind power equipment production, the material cost of lubrication discs accounts for a significant proportion. The high cost of copper materials is detrimental to cost control and market competitiveness in the wind power industry.

[0006] 3. The copper ring and the base material are mostly connected by an interference fit. Although this fit can ensure relative fixation in the initial stage, during long-term use, the copper ring is prone to creep due to various factors such as alternating loads and temperature changes. Once the copper ring creeps, it will not only disrupt the normal operation of the lubrication disc, but may also cause other more serious failures, such as oil leakage and accelerated wear of parts, seriously threatening the safe operation of the wind turbine gearbox. Utility Model Content

[0007] This utility model provides a lubrication disc structure for a wind turbine gearbox, which can solve the problem that the existing lubrication disc uses a thin-walled copper ring structure, which is prone to deformation during processing and assembly, making it difficult to guarantee precision, and easily affecting the lubrication effect inside the gearbox, thus reducing the overall operational stability of the wind turbine gearbox.

[0008] This application provides the following technical solution: a lubrication disc structure for a wind turbine gearbox, comprising a primary planetary carrier, a secondary planetary carrier, and a lubrication disc located between the primary and secondary planetary carriers; the lubrication disc includes a substrate, the substrate being fixed to the end face of the secondary planetary carrier, and a wear-resistant coating being attached to the outer peripheral surface of the end of the substrate away from the secondary planetary carrier, and the primary planetary carrier being sleeved on the wear-resistant coating.

[0009] Beneficial effects:

[0010] 1. Ensuring effective lubrication of the lubrication disc, extending its service life, and improving gearbox operational stability. The lubrication disc is coated with a wear-resistant coating. Compared to existing technologies using assembled thin-walled copper ring structures, this solution avoids copper ring deformation during parts processing or assembly, reducing processing difficulty and improving precision. Furthermore, the wear-resistant coating effectively resists friction generated during the relative movement of the primary planetary carrier and the lubrication disc, significantly extending the lubrication disc's service life. This reduces maintenance costs and downtime associated with frequent lubrication disc replacements, improving the operating efficiency of the wind turbine gearbox. Simultaneously, the wear-resistant coating better maintains the lubricating oil film, reducing direct metal-to-metal contact, lowering the coefficient of friction, and ensuring more thorough lubrication. This reduces wear and heat generation during gearbox operation, improves energy transmission efficiency, and enhances the overall performance of the wind turbine gearbox.

[0011] 2. Reduce vibration, extend gear life, and improve gearbox operational reliability. The wear-resistant coating adheres to the outer circumferential surface of the lubrication disc. Compared to existing technologies, this solution eliminates the risk of creep in the copper rings, resulting in smoother relative rotation between the first and second planetary carriers, preventing noise pollution. It also reduces tooth surface wear and the risk of tooth breakage during planetary gear meshing, extending gear life and improving the operational reliability of the gearbox.

[0012] Furthermore, the wear-resistant coating is a copper alloy coating, a nickel-based coating, or a cobalt-based coating.

[0013] Beneficial effects: The wear-resistant coating possesses excellent high-temperature wear resistance, corrosion resistance, and oxidation resistance, enabling it to adapt to the high temperatures and complex environments encountered during wind turbine gearbox operation. This ensures smooth operation between planetary carriers at each stage, improving the reliability of the gearbox operation.

[0014] Furthermore, the wear-resistant coating is attached to the outer peripheral surface of the substrate by electroplating or cladding processes.

[0015] Beneficial effects: Electroplating and cladding processes allow the wear-resistant coating to bond tightly to the substrate surface, making it less prone to peeling off. Compared with existing technologies, it does not cause the problem of lubrication disc creep. Furthermore, the use of electroplating or cladding processes results in good uniformity and high surface smoothness of the wear-resistant coating, which can effectively ensure the stability of the rotational connection of each level of planetary carrier.

[0016] Furthermore, the substrate is provided with interconnected axial oil passages and radial oil passages.

[0017] Beneficial effects: The interconnected oil channels can guide the lubricating oil according to actual needs and deliver it to the corresponding parts to meet lubrication requirements and ensure stable operation of the equipment.

[0018] Furthermore, an oil distribution ring is provided at the end of the radial oil passage.

[0019] Beneficial effects: The oil distribution ring can evenly distribute the lubricating oil delivered from the radial oil passage to the surrounding lubrication areas, ensuring comprehensive and balanced lubrication and avoiding localized wear caused by uneven lubrication distribution.

[0020] Furthermore, the first-stage planetary carrier is provided with a first-stage oil passage, and the second-stage planetary carrier is provided with a second-stage oil passage. The first-stage oil passage is connected to the oil distribution ring, and the second-stage oil passage is connected to the axial oil passage.

[0021] Beneficial effects: The lubricating oil enters from the secondary oil passage, passes through the axial oil passage, radial oil passage and oil distribution ring in sequence, and is evenly distributed to the key parts of the primary planetary carrier by the oil distribution ring, ensuring that the gears, bearings and other components of the primary planetary carrier are fully lubricated and reducing wear. Attached Figure Description

[0022] Figure 1 This is the main structural view of the present invention. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method:

[0024] The markings in the accompanying drawings include: primary planetary carrier 1, base 2, secondary planetary carrier 3, secondary oil passage 4, axial oil passage 5, screw 6, radial oil passage 7, wear-resistant coating 8, oil distribution ring 9, and primary oil passage 10.

[0025] Example 1

[0026] like Figure 1 As shown, a lubrication disc structure for a wind turbine gearbox includes a primary planetary carrier 1, a secondary planetary carrier 3, and a lubrication disc located between the primary planetary carrier 1 and the secondary planetary carrier 3.

[0027] The lubrication disc includes a substrate 2 and a wear-resistant coating 8 attached to the outer peripheral surface of the substrate 2. The substrate 2 is axially fixed to the end face of the secondary planetary carrier 3 by screws 6, and one end of the substrate 2 extends into the inner hole of the secondary planetary carrier 3, and is clearance-fitted with the inner hole of the secondary planetary carrier 3. The wear-resistant coating 8 is attached to the outer peripheral surface of the end of the substrate 2 away from the secondary planetary carrier 3, and the primary planetary carrier 1 is fitted onto the wear-resistant coating 8, with a gap between the inner hole of the primary planetary carrier 1 and the wear-resistant coating 8.

[0028] The wear-resistant coating 8 is a copper alloy coating, a nickel-based coating, or a cobalt-based coating. It possesses excellent high-temperature wear resistance, corrosion resistance, and oxidation resistance, enabling it to adapt to the high temperatures and complex environments encountered during wind turbine gearbox operation. This ensures stable operation between planetary carriers at each stage, improving gearbox reliability. Furthermore, the wear-resistant coating 8 is adhered to the outer circumferential surface of the substrate 2 through electroplating or cladding processes. These processes ensure a tight bond between the wear-resistant coating 8 and the substrate 2 surface, preventing it from peeling off. Compared to existing technologies, this avoids the problem of lubrication disc creep. The electroplating or cladding process also results in good uniformity and a high surface finish for the wear-resistant coating 8, effectively guaranteeing the smooth rotational connection of each planetary carrier.

[0029] like Figure 1 As shown, the base 2 also has interconnected axial oil passages 5 and radial oil passages 7. The end of the radial oil passage 7 is also provided with an oil distribution ring 9, which is an annular groove formed along the outer ring of the base 2. The first-stage planetary carrier 1 has a first-stage oil passage 10, and the second-stage planetary carrier 3 has a second-stage oil passage 4. The first-stage oil passage 10 is connected to the oil distribution ring 9, and the second-stage oil passage 4 is connected to the axial oil passage 5. Lubricating oil enters from the second-stage oil passage 4, passes sequentially through the axial oil passage 5, the radial oil passage 7, and the oil distribution ring 9, and is evenly distributed to various key parts of the first-stage planetary carrier 1 by the oil distribution ring 9, ensuring sufficient lubrication of the gears, bearings, and other components of the first-stage planetary carrier 1 and reducing wear. The oil distribution ring 9 can evenly distribute the lubricating oil delivered from the radial oil passage 7 to the surrounding lubrication areas, ensuring comprehensive and balanced lubrication and avoiding localized increased wear due to uneven lubrication distribution.

[0030] The usage method of this structure is as follows:

[0031] The flow direction of lubricating oil is as follows Figure 1 As shown by the arrows, lubricating oil enters from the secondary oil passage 4 into the axial oil passage 5 in the base 2, and then enters the oil distribution ring 9 through the radial oil passage 7. Due to the different rotational speeds of the primary planetary carrier 1 and the secondary planetary carrier 3, the oil distribution ring 9 can store lubricating oil while simultaneously supplying it to the primary oil passage 10 and distributing it to the bearings and gears, achieving a lubrication effect. The wear-resistant coating 8 attached to the lubrication disc forms an integral structure with the lubrication disc. Compared to the existing assembled thin-walled copper ring structure, this solution avoids the problem of copper ring deformation during parts processing or assembly, reduces processing difficulty, and improves precision. Furthermore, the wear-resistant coating 8 effectively resists the friction generated during the relative movement of the primary planetary carrier 1 and the lubrication disc, greatly extending the service life of the lubrication disc. Simultaneously, the wear-resistant coating 8 adheres to the outer circumferential surface of the lubrication disc, preventing the risk of creep. This makes the relative rotation of the primary planetary carrier 1 and the secondary planetary carrier 3 more stable, avoiding noise pollution. It also reduces tooth surface wear and the risk of tooth breakage during planetary gear meshing, extending gear life and improving the operational reliability of the gearbox.

[0032] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lubrication disc structure for a wind turbine gearbox, characterized in that: It includes a primary planetary carrier, a secondary planetary carrier, and a lubrication disc located between the primary and secondary planetary carriers; the lubrication disc includes a substrate, which is fixed to the end face of the secondary planetary carrier, and a wear-resistant coating is attached to the outer peripheral surface of the end of the substrate away from the secondary planetary carrier, and the primary planetary carrier is fitted onto the wear-resistant coating.

2. The lubrication disc structure of a wind turbine gearbox according to claim 1, characterized in that: The wear-resistant coating is a copper alloy coating, a nickel-based coating, or a cobalt-based coating.

3. The lubrication disc structure of a wind turbine gearbox according to claim 2, characterized in that: The wear-resistant coating is attached to the outer peripheral surface of the substrate by electroplating or cladding processes.

4. The lubrication disc structure of a wind turbine gearbox according to claim 3, characterized in that: The substrate has interconnected axial oil passages and radial oil passages.

5. The lubrication disc structure of a wind turbine gearbox according to claim 4, characterized in that: The radial oil passage is also provided with an oil distribution ring at its end.

6. The lubrication disc structure of a wind turbine gearbox according to claim 5, characterized in that: The first-stage planetary carrier is provided with a first-stage oil passage, and the second-stage planetary carrier is provided with a second-stage oil passage. The first-stage oil passage is connected to the oil distribution ring, and the second-stage oil passage is connected to the axial oil passage.

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