Pipeline structure and wind power generation equipment

Abstract

This utility model discloses a pipeline structure and wind power generation equipment, relating to the field of wind power generation technology. The pipeline structure, used to introduce lubricating oil into a wind turbine gearbox within a wind power generation device, is characterized by comprising an inner pipe, an outer pipe, and a ventilation assembly. Lubricating oil flows within the inner pipe, one end of which is connected to the ventilation gearbox. A portion of the inner pipe forms a first inner pipe section. The outer pipe is fitted over the outside of the first inner pipe section, defining an annular cavity between the first inner pipe section and the outer pipe. The ventilation assembly has an inlet and an outlet, both connected to the annular cavity, allowing airflow to enter the annular cavity from the inlet, absorb heat within the annular cavity, and then exit from the outlet. This utility model enables continuous heat exchange within the inner pipe, preventing excessively high inner pipe temperatures from affecting pipe sealing and lubricating oil performance.

Description

Technical Field

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

[0002] In existing wind turbine gearboxes, the lubricating oil sump is typically connected via connecting pipes within the gearbox to ensure balanced lubrication of each transmission component. However, traditional connecting pipes are mostly rigid straight pipes or simple flexible hoses. Wind turbine gearboxes operate at high and rapidly changing oil temperatures, which can cause deformation of the pipes under high temperatures, leading to seal failure. Furthermore, excessively high temperatures can also affect the performance of the lubricating oil within the pipes. Utility Model Content

[0003] The main objective of this invention is to propose a piping structure designed to improve the heat dissipation of existing wind turbine gearbox piping structures. To achieve the above objectives, this utility model proposes a pipeline structure for introducing lubricating oil into a wind turbine gearbox in a wind power generation device. The pipeline structure comprises an inner pipe, an outer pipe, and a ventilation assembly. Lubricating oil flows within the inner pipe, one end of which connects to the wind turbine gearbox, and a portion of the inner pipe forms a first inner pipe segment. The outer pipe is fitted over the outside of the first inner pipe segment to define an annular cavity between the first inner pipe segment and the outer pipe. The ventilation assembly has an inlet and an outlet, both of which connect to the annular cavity, allowing airflow to enter the annular cavity from the inlet, absorb heat within the annular cavity, and then exit from the outlet.

[0004] In one embodiment, the annular cavity is connected to an air inlet pipe, the end of which forms the air inlet; and / or, the annular cavity is connected to an air outlet pipe, the end of which forms the air outlet.

[0005] In one embodiment, the air inlet pipe and the air outlet pipe are respectively disposed on two opposite sides of the annular cavity in the radial direction; and / or, there are multiple air outlet pipes, which extend along the length direction of the first inner pipe section, and the air inlet pipe is disposed between the multiple air outlet pipes; and / or, an axial flow fan is provided at the end of the air inlet pipe to form a pressurized airflow in the air inlet pipe.

[0006] In one embodiment, the inner pipe, the outer casing pipe, the air inlet pipe, and the air outlet pipe are configured as structural groups in a one-to-one correspondence. Multiple structural groups are provided, and the air inlet pipes in the multiple structural groups are connected to the air outlet of the axial flow fan through a confluence pipe.

[0007] In one embodiment, at least a portion of the intake pipe and / or the outlet pipe is provided with a corrugated pipe; and / or, the intake pipe and / or the outlet pipe is provided with a regulating valve.

[0008] In one embodiment, sealing rings are provided at both ends of the outer sleeve.

[0009] In one embodiment, the pipeline structure further includes a shock-absorbing assembly, which includes a support base, an annular baffle, and a buffer ring. The support base is installed between the inner pipe and the outer pipe. Two annular baffles are provided, and the two annular baffles are connected to opposite sides of the support base. The buffer ring is installed between the two annular baffles and is slidably connected to the support base.

[0010] In one embodiment, at least two counterweights are mounted on the buffer ring, the counterweights being evenly distributed on the buffer ring such that the center of mass of the buffer ring is located at the center of the middle part of the buffer ring; and / or, a plurality of air holes are provided on the annular baffle, the air holes being used to communicate between the two annular baffles and the annular cavity; and / or, the buffer ring includes at least two elastic rings sleeved together inwards and outwards, wherein the hardness of the inner elastic ring is greater than the hardness of the outer elastic ring among two adjacent elastic rings.

[0011] In one embodiment, at least two elastic rings include an adjacent outer elastic ring and an inner elastic ring, wherein one of the outer elastic ring and the inner elastic ring is provided with a locking protrusion and the other is provided with a locking groove, the locking protrusion being accommodated in the locking groove.

[0012] This utility model also proposes a wind power generation device, including the aforementioned pipeline structure.

[0013] The technical solution of this utility model is to set an inner tube and an outer tube. The inner tube is used to flow lubricating oil, and the outer tube is sleeved on the outside of the inner tube. An annular cavity can be formed in the inner tube and the outer tube. The ventilation component has an air inlet and an air outlet. The air inlet can allow air to flow into the annular cavity, and after absorbing heat, it can be discharged from the air outlet. This can continuously exchange heat with the inner tube and avoid the inner tube temperature from being too high, which would affect the pipe sealing and the performance of the lubricating oil. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 A schematic diagram of an embodiment of the pipeline structure provided by this utility model; Figure 2 For having Figure 1 Cross-sectional view of the inner and outer casing pipes; Figure 3 A schematic diagram of another embodiment of the pipeline structure provided by this utility model; Figure 4 A schematic diagram of another embodiment of the pipeline structure provided by this utility model; Figure 5 For having Figure 4 Schematic diagram of the middle buffer ring; Figure 6 For having Figure 4 Exploded view of the buffer ring.

[0016] Explanation of icon numbers: 1. Inner pipe; 2. Outer pipe; 3. Ventilation assembly; 301. Air inlet; 302. Air outlet; 303. Air inlet pipe; 304. Air outlet pipe; 305. Axial flow fan; 306. Bellows; 307. Regulating valve; 308. Sealing ring; 4. Annular cavity; 5. Shock absorption assembly; 501. Support base; 502. Annular baffle; 503. Buffer ring; 504. Counterweight; 505. Air hole; 506. Outer elastic ring; 507. Inner elastic ring; 508. Engraving; 509. Slot; 6. Lever-type quick connector.

[0017] 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

[0018] 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 scope of protection of the present utility model.

[0019] 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 specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] 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 technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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. When 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.

[0021] In existing wind turbine gearboxes, the lubricating oil sump is typically connected via connecting pipes within the gearbox to ensure balanced lubrication of each transmission component. However, traditional connecting pipes are mostly rigid straight pipes or simple flexible hoses. Wind turbine gearboxes operate at high and rapidly changing oil temperatures, which can cause deformation of the pipes under high temperatures, leading to seal failure. Furthermore, excessively high temperatures can also affect the performance of the lubricating oil within the pipes.

[0022] Therefore, this utility model proposes a pipeline structure.

[0023] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the pipeline structure is used to introduce lubricating oil into a wind turbine gearbox in a wind power generation device. The pipeline structure includes an inner pipe 1, an outer sleeve 2, and a ventilation assembly 3. Lubricating oil flows within the inner pipe 1, and one end of the inner pipe 1 is connected to the wind turbine gearbox. A portion of the inner pipe 1 forms a first inner pipe section 1. The outer sleeve 2 is fitted over the outside of the first inner pipe section 1 to define an annular cavity 4 between the first inner pipe section 1 and the outer sleeve 2. The ventilation assembly 3 has an air inlet 301 and an air outlet 302, both of which are connected to the annular cavity 4, allowing airflow to enter the annular cavity 4 from the air inlet 301, absorb heat within the annular cavity 4, and then exit from the air outlet 302.

[0024] In this embodiment of the invention, an inner tube 1 and an outer tube 2 are provided. The inner tube 1 is used to circulate lubricating oil, and the outer tube 2 is sleeved on the outside of the inner tube 1, forming an annular cavity 4 inside the inner tube 1 and the outer tube 2. The ventilation component 3 has an air inlet 301 and an air outlet 302. The air inlet 301 can allow air to flow into the annular cavity 4, and after absorbing heat, it can be discharged from the air outlet, thereby continuously exchanging heat with the inner tube 1 and avoiding excessively high temperature of the inner tube 1 from affecting the pipe sealing and lubricating oil performance.

[0025] It should be noted that the lubricating oil in the inner tube 1 comes from the lubricating oil tank or oil sump of the wind turbine gearbox and flows to the corresponding lubrication point. The lubrication point can be the gear meshing part or moving parts such as bearings that need lubrication, and finally returns to the lubricating oil tank or oil sump through the return oil channel in the wind turbine gearbox after filtration.

[0026] In one embodiment, the annular cavity 4 is connected to an air inlet pipe 303, the end of which forms the air inlet 301; and / or, the annular cavity 4 is connected to an air outlet pipe 304, the end of which forms the air outlet 302.

[0027] In this embodiment of the present invention, by providing an air inlet pipe 303, airflow can flow in from the air inlet pipe 303 and enter the annular cavity 4 through the air inlet 301; and an air outlet pipe 304 is provided, so that gas can flow from the annular cavity 4 from the air outlet 302 to the air outlet pipe 304 and be discharged to the outside.

[0028] It should be noted that the above-mentioned related technical features, namely "the annular cavity 4 is connected to an air inlet pipe 303, the end of the air inlet pipe 303 forms the air inlet 301" and "the annular cavity 4 is connected to an air outlet pipe 304, the end of the air outlet pipe 304 forms the air outlet 302", can be provided in one or both, and this utility model does not limit them.

[0029] In one embodiment, the air inlet pipe 303 and the air outlet pipe 304 are respectively disposed on two opposite sides of the annular cavity 4 in the radial direction; and / or, there are multiple air outlet pipes 304, which extend along the length direction of the first inner pipe 1, and the air inlet pipe 303 is disposed among the multiple air outlet pipes 304; and / or, an axial flow fan 305 is provided at the end of the air inlet pipe 303 to form a pressurized airflow in the air inlet pipe 303.

[0030] In this embodiment of the invention, the inlet pipe 303 and the outlet pipe 304 can be arranged opposite each other, so that the airflow in the inlet pipe 303 and the outlet pipe 304 flows in a single direction throughout the entire annular cavity 4, covering all areas of the pipe and ensuring heat dissipation. In this embodiment, the inlet pipe 303 can also be arranged between multiple outlet pipes 304, so that the airflow entering through the inlet pipe 303 can be diverted to multiple outlet pipes 304 for discharge, covering all areas of the pipe and ensuring heat dissipation. At the same time, in this embodiment, an axial flow fan 305 is provided at the end of the inlet pipe 303 so that the inlet pipe 303 can continuously supply airflow to ensure heat dissipation.

[0031] It should be noted that the above-mentioned related technical features, namely: "the air inlet pipe 303 and the air outlet pipe 304 are respectively disposed on two opposite sides of the annular cavity 4 in the radial direction", "there are multiple air outlet pipes 304, which extend along the length direction of the first inner pipe 1, and the air inlet pipe 303 is disposed between the multiple air outlet pipes 304", and "an axial flow fan 305 is provided at the end of the air inlet pipe 303 to form a pressurized airflow in the air inlet pipe 303", can be selected or disposed simultaneously, and this utility model does not limit this.

[0032] In one embodiment, the inner pipe 1, the outer casing pipe 2, the air inlet pipe 303, and the air outlet pipe 304 are configured as structural groups in a one-to-one correspondence. Multiple structural groups are configured, and the air inlet pipes 303 in the multiple structural groups are connected to the air outlet of the axial flow fan 305 through a confluence pipe.

[0033] In the embodiments of this utility model, multiple structural groups can be set up, so that a single axial flow fan 305 can be used to dissipate heat from multiple inner tubes 1 and outer tubes 2 that require heat dissipation.

[0034] It should be noted that the axial flow fan 305 in this embodiment can be set outside the wind turbine gearbox to draw in external air as a cooling airflow, and can be connected to a filter with a filter element to filter particles in the air. It can also be further connected to a dryer, which can be set as a regenerative adsorption dryer for drying, or other structures that can perform filtration and drying.

[0035] In one embodiment, at least a portion of the pipe section on the intake pipe 303 and / or the outlet pipe 304 is provided as a corrugated pipe 306; and / or, the intake pipe 303 and / or the outlet pipe 304 is provided with a regulating valve 307.

[0036] In this embodiment of the invention, by setting a corrugated pipe 306, the connection between the air inlet pipe 303 or the air outlet pipe 304 is set as a flexible structure, which can reduce aging problems caused by vibration and other reasons, compensate for thermal expansion and contraction and installation errors, and avoid stress concentration. At the same time, in this embodiment, a regulating valve 307 is provided on the air inlet pipe 303 or the air outlet pipe 304. The regulating valve 307 can regulate the airflow of the air inlet pipe 303 and the air outlet pipe 304, thereby controlling the heat dissipation efficiency of the annular cavity 4 corresponding to different inner pipes 1 and outer outer pipes 2. At the same time, by adjusting the regulating valve 307 of the air outlet pipe 304, the air pressure in the annular cavity 4 can be controlled, and the increased pressure for heat dissipation can counteract pipe deformation.

[0037] It should be noted that the above-mentioned related technical features, namely "at least a portion of the pipe section on the intake pipe 303 is provided as a corrugated pipe 306", "at least a portion of the pipe section on the exhaust pipe 304 is provided as a corrugated pipe 306", "the intake pipe 303 is provided with a regulating valve 307" and "the exhaust pipe 304 is provided with a regulating valve 307", can be selected or provided simultaneously. This utility model does not limit this.

[0038] See Figure 3 In one embodiment, sealing rings 308 are provided at both ends of the outer sleeve tube 2.

[0039] In this embodiment of the invention, the end of the outer casing 2 is provided with a sealing ring 308, which can prevent the airflow in the annular cavity 4 from flowing out from the outlet other than the air outlet 302, so as to facilitate the unified discharge of the discharged gas to the outside of the wind turbine gearbox.

[0040] It should be noted that the sealing ring 308 can be connected to an interface structure, which is connected to the inner tube 1 to facilitate the connection of related lubricating oil pipelines. Specifically, in this embodiment, the interface is set as a lever-type quick connector 6 structure, which facilitates disassembly and installation.

[0041] See Figure 4 In one embodiment, the pipeline structure further includes a shock-absorbing component 5, which includes a support base 501, an annular baffle 502, and a buffer ring 503. The support base 501 is installed between the inner pipe 1 and the outer pipe 2. Two annular baffles 502 are provided, and the two annular baffles 502 are connected to the opposite sides of the support base 501. The buffer ring 503 is installed between the two annular baffles 502 and is slidably connected to the support base 501.

[0042] In this embodiment of the invention, by providing the vibration damping component 5, the transmitted vibration of the pipeline structure within the wind turbine housing can be buffered and suppressed, thereby improving the pipeline's lifespan. In this embodiment, the buffer ring 503 can slide towards the annular baffle 502 on one side when the pipeline structure vibrates, thus utilizing the air pressure in the cavity formed between the buffer ring 503 and the annular baffle 502 for buffering, converting a portion of the vibration into the mechanical and internal energy of the buffer ring 503, suppressing the vibration. Furthermore, the buffer ring 503 can rotate around the inner tube 1 as its axis, converting a portion of the vibration into the kinetic energy of the buffer ring 503's rotation, further suppressing the vibration. Simultaneously, the support base 501 and the annular baffle 502 can support the inner tube 1 and the outer tube 2, ensuring that the inner tube 1 and the outer tube 2 maintain the annular cavity 4 structure.

[0043] See Figure 5 In one embodiment, at least two counterweights 504 are installed on the buffer ring 503, and the counterweights 504 are evenly distributed on the buffer ring 503 such that the center of mass of the buffer ring 503 is located at the center of the middle part of the buffer ring 503; and / or, a plurality of air holes 505 are provided on the annular baffle 502, and the air holes 505 are used to connect the two annular baffles 502 with the annular cavity 4; and / or, the buffer ring 503 includes at least two elastic rings that are sleeved together inwards and outwards, and among two adjacent elastic rings, the hardness of the inner elastic ring is greater than the hardness of the outer elastic ring.

[0044] In this embodiment, by installing at least two counterweights 504, the buffer ring 503 can better absorb the mechanical energy of vibration using the counterweights 504. Simultaneously, the center of mass of the buffer ring 503 is located at the center of the middle of the buffer ring 503, preventing vibration during rotation. Furthermore, in this embodiment, through holes can be opened in the annular baffle 502, allowing gas between the buffer ring 503 and the annular baffle 502 to flow out and exchange with the airflow in the annular cavity 4. The heat from the damping component 5 can be controlled by adjusting the air pressure inside the annular cavity 4 through the regulating valve 307, thus balancing the air pressure on both sides of the buffer ring 503. This embodiment can also include two elastic rings, allowing the elastic rings to utilize their elasticity difference for buffering. The inner elastic ring has a higher hardness than the outer elastic ring, allowing the difference in hardness to enhance the buffering and vibration suppression effect.

[0045] It is understandable that the outer elastic ring can be made of metals with different hardness, such as an aluminum alloy ring with lower hardness on the outside and a carbon steel ring with higher hardness on the inside, or it can be made of other types of organic or inorganic materials with heat resistance to meet the requirements of this solution.

[0046] It should be noted that, in this embodiment, the counterweight 504 can be set to any number greater than or equal to two, provided that the center of mass of the buffer ring 503 is set at the center of the middle of the buffer ring 503. Specifically, in this embodiment, it is set to four, and the counterweight 504 can be made of a material with a higher density than the buffer ring 503, such as lead or tungsten. This utility model does not limit this.

[0047] It should be noted that the above-mentioned related technical features: "at least two counterweights 504 are installed on the buffer ring 503, and the counterweights 504 are evenly arranged on the buffer ring 503, such that the center of mass of the buffer ring 503 is located at the center of the middle part of the buffer ring 503", "a plurality of air holes 505 are opened on the annular baffle 502, and the air holes 505 are used to connect the two annular baffles 502 with the annular cavity 4", "the buffer ring 503 includes at least two elastic rings that are sleeved inward and outward, and the hardness of the inner elastic ring is greater than that of the outer elastic ring among two adjacent elastic rings", can be selected or provided simultaneously, and this utility model does not limit this.

[0048] See Figure 5 and Figure 6 In one embodiment, at least two elastic rings include an adjacent outer elastic ring 506 and an inner elastic ring 507. One of the outer elastic ring 506 and the inner elastic ring 507 is provided with a locking protrusion 508, and the other is provided with a locking groove 509. The locking protrusion 508 is accommodated in the locking groove 509.

[0049] In this embodiment of the invention, the elastic ring body utilizes the engagement of the protrusion 508 and the groove 509, enabling simple and reliable installation and facilitating disassembly and replacement.

[0050] This utility model also proposes a wind power generation device, including the aforementioned pipeline structure. The specific structure of this pipeline structure is as described in the above embodiments. Since this wind power generation device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0051] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pipeline structure for introducing lubricating oil into a wind turbine gearbox in a wind power generation device, characterized in that, The pipeline structure includes: An inner tube, in which lubricating oil flows, one end of which is connected to the wind turbine gearbox, and a portion of the inner tube forms a first inner tube segment; An outer sleeve is fitted over the outside of the first inner tube segment to define an annular cavity between the first inner tube segment and the outer sleeve; and, A ventilation assembly has an air inlet and an air outlet, both of which are connected to the annular cavity, so that airflow enters the annular cavity from the air inlet, absorbs heat in the annular cavity, and is discharged from the air outlet.

2. The pipeline structure as described in claim 1, characterized in that, The annular cavity is connected to an air inlet pipe, and the end of the air inlet pipe forms the air inlet; and / or, The annular cavity is connected to an air outlet pipe, and the end of the air outlet pipe forms the air outlet.

3. The pipeline structure as described in claim 2, characterized in that, The air inlet pipe and the air outlet pipe are respectively located on two opposite sides radially in the annular cavity; and / or, The air outlet pipes are provided in multiple locations and extend along the length of the first inner pipe section; the air inlet pipe is located between the multiple air outlet pipes; and / or, An axial flow fan is provided at the end of the air intake pipe to create a pressurized airflow inside the air intake pipe.

4. The pipeline structure as described in claim 3, characterized in that, The inner tube, the outer casing, the air inlet pipe, and the air outlet pipe are configured as structural groups in a one-to-one correspondence. Multiple structural groups are configured, and the air inlet pipes in the multiple structural groups are connected to the air outlet of the axial flow fan through a confluence pipe.

5. The pipeline structure as described in claim 2, characterized in that, At least a portion of the intake pipe and / or the outlet pipe is provided as a corrugated pipe; and / or The air inlet pipe and / or the air outlet pipe are equipped with regulating valves.

6. The pipeline structure as described in claim 1, characterized in that, Sealing rings are provided at both ends of the outer sleeve.

7. The pipeline structure as described in claim 1, characterized in that, The pipeline structure also includes a vibration damping component, which includes: The support base is installed between the inner tube and the outer tube; Annular baffles, wherein two annular baffles are provided, and the two annular baffles are connected to opposite sides of the support base; and, A buffer ring is installed between the two annular baffles and is slidably connected to the support base.

8. The pipeline structure as described in claim 7, characterized in that, At least two counterweights are mounted on the buffer ring, and the counterweights are evenly distributed on the buffer ring such that the center of mass of the buffer ring is located at the center of the middle part of the buffer ring; and / or, The annular baffle has multiple air holes, which connect the two annular baffles to the annular cavity; and / or, The buffer ring includes at least two elastic rings that are sleeved together inwards and outwards. Among two adjacent elastic rings, the inner elastic ring has a higher hardness than the outer elastic ring.

9. The pipeline structure as described in claim 8, characterized in that, At least two elastic rings include an adjacent outer elastic ring and an inner elastic ring, wherein one of the outer elastic ring and the inner elastic ring is provided with a locking protrusion and the other is provided with a locking groove, and the locking protrusion is accommodated in the locking groove.

10. A wind power generation device, characterized in that, Includes the piping structure as described in any one of claims 1 to 9.

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