Lubricating system, main shaft system and wind generating set

Abstract

The invention provides a lubricating system, a spindle system and a wind generating set, a shaft system comprises a rotating shaft and a bearing seat, the rotating shaft is rotatably arranged in the bearing seat, an oil inlet for lubricating oil to flow in is formed in the bearing seat, the lubricating system comprises an oil storage tank, an oil collecting tank, an oil supply pipeline, a conveying chain and a driving device, and the oil storage tank is used for storing the lubricating oil; the oil collecting tank is used for being arranged above an oil inlet of the bearing seat and can communicate with the oil inlet. The oil supply pipeline communicates the oil collection tank with the oil storage tank; the conveying chain is movably arranged in the oil supply pipeline so that lubricating oil in the oil storage tank can be conveyed to the oil collecting tank. The driving device is used for driving the conveying chain to move in the oil supply pipeline and providing lubricating oil for the shaft system, the oil supply pipeline is arranged between the oil collecting tank and the oil storage tank, and the lubricating oil in the oil storage tank can enter the oil collecting tank through the oil supply pipeline, is collected in the oil collecting tank and is provided for the bearing seat.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of wind power generation, and particularly relates to a lubrication system, a main shaft system, and a wind turbine generator set. Background Art

[0002] With the trend of large megawatt of wind turbines, the size of the main bearings of the fan transmission chain is also continuously increasing. The large-sized bearings bring challenges to the processing, transportation, operation and maintenance, and testing of conventional rolling bearings, resulting in a continuous increase in the cost of ultra-large-sized rolling bearings. In this context, the sliding bearing technology in the wind power field has emerged. The sliding bearing adopts a modular design concept and a non-integral structure method, which brings great convenience to processing and transportation, and can realize on-tower operation and maintenance of wind turbines, greatly reducing the cost of wind power bearings.

[0003] For sliding bearings, the lubrication conditions play a decisive role in their operating performance. Under certain special working conditions, if the lubrication is poor, it may cause serious damage such as bearing bush wear. Therefore, the lubrication state of sliding bearings has attracted much attention. Summary of the Invention

[0004] The main purpose of the present disclosure is to provide a lubrication system, a main shaft system, and a wind turbine generator set, so that the bearing lubrication does not require the use of electric energy.

[0005] In view of the above object, the present disclosure provides the following technical solutions:

[0006] In the first aspect of the present disclosure, a lubrication system is provided, which is applicable to the shaft system of a wind turbine generator set. The shaft system includes a rotating shaft and a bearing seat. The rotating shaft is rotatably arranged in the bearing seat. An oil inlet for allowing lubricating oil to flow in is provided on the bearing seat. The lubrication system includes an oil storage tank, an oil collection tank, an oil supply pipeline, a transmission chain, and a driving device. The oil storage tank is used for storing lubricating oil; the oil collection tank is used to be arranged above the oil inlet of the bearing seat and can be communicated with the oil inlet; the oil supply pipeline connects the oil collection tank and the oil storage tank; the transmission chain is movably arranged in the oil supply pipeline to be able to transfer the lubricating oil in the oil storage tank to the oil collection tank; the driving device is used to drive the transmission chain to move in the oil supply pipeline.

[0007] The lubrication system provided by the present disclosure is used to provide lubricating oil for the shaft system. An oil supply pipeline is provided between the oil collection tank and the oil storage tank. The lubricating oil in the oil storage tank can enter the oil collection tank through the oil supply pipeline and collect in the oil collection tank. Further, since the oil collection tank is arranged above the oil inlet of the bearing seat, the lubricating oil in the oil collection tank can flow into the oil inlet of the bearing seat under the action of gravity. Therefore, no additional power device is required for the flow of lubricating oil between the oil collection tank and the bearing seat, simplifying the structure of the lubrication system.

[0008] In an exemplary embodiment of the present disclosure, an oil storage bin is provided on the conveyor chain. The oil storage bin can convey the lubricating oil in the oil storage tank to the oil collection tank and pour the lubricating oil into the oil collection tank after reaching the oil collection tank. With this arrangement, the size of the oil storage bin is set according to the demand for lubricating oil in the lubrication system, improving the conveying efficiency of the lubricating oil.

[0009] Optionally, the conveyor chain includes a plurality of chain links that are rotatably connected to each other, and the oil storage bin is provided on at least one of the plurality of chain links. With this arrangement, adjacent chain links can rotate relative to each other to engage with the gear, thereby improving the reliability of use of the conveyor chain. Further, the number of oil storage bins is set according to the demand for lubricating oil in the lubrication system, thereby improving the versatility of the lubrication system.

[0010] Specifically, the chain link includes a transmission block and a connecting column. The connecting column is fixed to the first end of the transmission block, and a column hole matching the connecting column is recessed in the end face of the second end of the transmission block. The connecting column of one chain link is inserted into the column hole of another chain link adjacent to its tail. With this arrangement, the transmission block and the connecting column can be stably connected, further improving the connection reliability of the conveyor chain.

[0011] Further, two adjacent chain links are rotatably connected by a pin shaft. A first pin shaft hole for the pin shaft to pass through is provided on the transmission block of one chain link, and a second pin shaft hole for the pin shaft to pass through is provided on the connecting column of another chain link adjacent to the transmission block of one chain link. The pin shaft is inserted into the first pin shaft hole and the second pin shaft hole at the same time, connecting the adjacent chain links together. With this arrangement, the adjacent chain links are connected by the pin shaft, improving the connection reliability of the chain links.

[0012] In another exemplary embodiment of the present disclosure, the pin shaft extends in a first direction, the connecting column extends in a second direction, the column hole is an oval hole, the column hole extends recessedly from the head end face of the transmission block towards the tail of the transmission block, the long axis of the oval hole extends in a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other, wherein the second direction is parallel to the direction in which the transmission block extends from the head to the tail. With this arrangement, adjacent chain links can rotate freely to engage reliably with the gear, further improving the reliability of use of the conveyor chain.

[0013] Optionally, the head of the connecting column is fixed to the tail of the transmission block, the column hole is provided at the head of the transmission block, the oil storage bin is recessed from the head end surface of the transmission block toward the tail of the transmission block, and the oil storage bin and the column hole are spaced apart along the first direction. In this way, when the conveyor chain is moving upward, the opening of the oil storage bin in the upward section faces upward so as to be able to convey lubricating oil upward.

[0014] Specifically, the lubrication system further includes a gear matched with the conveyor chain, the gear is rotatably connected to the oil collecting tank, each of the chain links is provided with a toothed portion meshing with the gear, and the toothed portion is meshingly connected with the gear. In this way, the transmission of the gear and the conveyor chain is meshed, which improves the reliability of the conveyor chain movement and avoids the conveyor chain from slipping during movement, thereby improving the reliability of the lubrication system.

[0015] Furthermore, the driving device includes a fan, and the fan is connected to the gear, and the gear is driven to rotate by the rotation of the fan. In this way, the fan can drive the gear to rotate when it rotates under the action of external wind force, and then drive the transmission chain to move, so as to provide power for the lubrication system, which is energy-saving and environmentally friendly, and does not depend on the operating state of the wind turbine. Even in the fault state of the wind turbine (such as the unit is without power), the lubrication system can still operate normally, further improving the reliability of the lubrication system.

[0016] According to another exemplary embodiment of the present disclosure, a tooth groove capable of meshing with the gear is formed on a side of the chain link facing the gear, and the tooth groove can mesh with a tooth portion of the gear to drive the conveyor chain to move through the rotation of the gear.

[0017] Optionally, at least two tooth grooves are arranged on the chain link, and at least two tooth grooves are arranged at intervals in the rotation direction of the gear. In this way, the gear and the chain link can be reliably engaged, avoiding accidental shaking of the chain link relative to the gear, thereby improving the movement reliability of the conveyor chain.

[0018] Specifically, the oil storage tank is arranged below the bearing seat, and an oil return port is arranged at the bottom end of the bearing seat, and the oil return port is connected to the oil storage tank. Such an arrangement facilitates the lubricating oil in the bearing seat to flow back to the oil storage tank under the action of gravity.

[0019] Further, a first chain inlet and a first chain outlet are provided on the oil collecting tank, a second chain inlet and a second chain outlet are provided on the oil storage tank, the oil supply pipeline includes a first oil supply pipe and a second oil supply pipe, the upper end of the first oil supply pipe is connected between the first chain outlet and the second chain inlet, and the second oil supply pipe is connected between the first chain inlet and the second chain outlet. With such a setting, a circulating oil path is formed between the oil collecting tank and the oil storage tank to supply the transfer chain to move and transfer the lubricating oil into the oil collecting tank.

[0020] In another exemplary embodiment of the present disclosure, the distance between the port of the first oil supply pipe and the port of the second oil supply pipe in the oil storage tank is less than the dimension of the chain link along the extending direction of the transfer chain. With such a setting, jamming of the chain link with the port of the first oil supply pipe or the port of the second oil supply pipe during the movement of the chain link is avoided, thereby improving the reliability of the movement of the transfer chain.

[0021] Optionally, the transfer chain continuously extends circumferentially around the rotating shaft, the oil supply pipeline continuously extends in the oil storage tank, and communication ports are provided on the pipe wall of the oil supply pipeline located in the oil storage tank. With such a setting, the oil supply pipeline continuously extends in the oil storage tank, avoiding the potential hazard of jamming of the chain link with the end of the oil supply pipeline, thereby further improving the reliability of use of the lubrication system.

[0022] In a second aspect of the present disclosure, a main shaft system is provided. The main shaft system includes a shaft system and the lubrication system as described above. The shaft system includes a rotating shaft and a bearing seat. The rotating shaft is rotatably disposed in the mounting hole of the bearing seat, and an oil inlet hole for allowing the lubricating oil to flow in is provided on the bearing seat. The lubrication system is communicated with the oil inlet hole.

[0023] In the main shaft system provided by the present disclosure, an oil supply pipeline is provided between the oil collecting tank and the oil storage tank. The lubricating oil in the oil storage tank can enter the oil collecting tank through the oil supply pipeline and be collected in the oil collecting tank. Further, since the oil collecting tank is disposed above the oil inlet of the bearing seat, the lubricating oil in the oil collecting tank can flow into the oil inlet of the bearing seat under the action of gravity. Therefore, no additional power device is required for the flow of the lubricating oil between the oil collecting tank and the bearing seat, simplifying the structure of the lubrication system.

[0024] In another exemplary embodiment of the present disclosure, the shaft system further includes a plurality of sliders disposed between the bearing seat and the rotating shaft, and the plurality of sliders are spaced apart circumferentially along the rotating shaft.

[0025] In another aspect of the present disclosure, a wind power generating set is provided. The wind power generating set includes a generator, an impeller, and the main shaft system as described above. The two ends of the rotating shaft are respectively connected to the impeller and the rotor of the generator. Description of the Drawings

[0026] Through the following description of the embodiments in conjunction with the accompanying drawings, the above and / or other objects and advantages of the present disclosure will become clearer, where:

[0027] Figure 1 It is a structural diagram of a lubrication system provided for an exemplary embodiment of the present disclosure.

[0028] Figure 2 It is Figure 1 a cross-sectional view of the lubrication system in

[0029] Figure 3 It is Figure 1 a partial structural diagram of the conveyor chain in

[0030] Figure 4 It is Figure 3 a partial structural diagram of the engagement connection between the conveyor chain and the gear in

[0031] Figure 5 It is Figure 3 a structural diagram of a link provided for an exemplary embodiment in

[0032] Description of reference numerals:

[0033] 1. Rotating shaft; 2. Slide block;

[0034] 3. Oil storage tank; 4. Oil supply pipeline;

[0035] 5. Oil collection tank; 6. Transition oil pipe;

[0036] 7. Gear; 8. Fan;

[0037] 9. Oil return port; 10. Conveyor chain;

[0038] 11. Bearing seat; 12. Link;

[0039] 13. Pin shaft; 14. Engine room;

[0040] 121. Transmission block;

[0041] 122. Connecting column; 123. Column hole;

[0042] 124. First pin hole; 125. Second pin hole;

[0043] 126. Oil storage bin; 127. Tooth part. Detailed implementation manners

[0044] Now, the exemplary embodiments will be described more comprehensively with reference to the accompanying drawings. However, it should not be understood that the embodiments of the present disclosure are limited to the embodiments described herein. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0045] Referring to Figure 1 and Figure 2 , the present disclosure provides a lubrication system applicable to the shafting of a wind turbine generator set. The wind turbine generator set includes a generator, an impeller, and a main shaft system. The main shaft system includes a shafting and a lubrication system. The shafting includes a rotating shaft 1 and a bearing housing 11. The rotating shaft 1 is rotatably disposed in the mounting hole of the bearing housing 11. An oil inlet hole for allowing lubricating oil to flow in is provided on the bearing housing 11. The lubrication system is communicated with the oil inlet hole. Both ends of the rotating shaft 1 are respectively connected to the impeller and the rotor of the generator, so as to drive the rotor of the generator to rotate through the rotation of the impeller, and thus generate electricity by the generator.

[0046] Specifically, the shafting includes a rotating shaft 1 and a bearing housing 11. The rotating shaft 1 is rotatably disposed in the bearing housing 11. An oil inlet for supplying lubricating oil is provided on the bearing housing 11. The lubrication system includes an oil storage tank 3, an oil collecting tank 5, an oil supply pipeline 4, a conveyor chain 10, and a driving device. The oil storage tank 3 is used for storing lubricating oil, so that the oil storage tank 3 serves as the oil source of the lubrication system. The oil collecting tank 5 is used to be disposed above the oil inlet of the bearing housing 11 and can be communicated with the oil inlet. The oil supply pipeline 4 communicates the oil collecting tank 5 with the oil storage tank 3. The conveyor chain 10 is movably disposed in the oil supply pipeline 4 to be able to convey the lubricating oil in the oil storage tank 3 to the oil collecting tank 5. The driving device is used to drive the conveyor chain 10 to move in the oil supply pipeline 4.

[0047] The lubrication system provided by the present disclosure is used to provide lubricating oil for the shafting. An oil supply pipeline 4 is provided between the oil collecting tank 5 and the oil storage tank 3. The lubricating oil in the oil storage tank 3 can enter the oil collecting tank 5 through the oil supply pipeline 4 and collect in the oil collecting tank 5. Since the oil collecting tank 5 is disposed above the oil inlet of the bearing housing 11, the lubricating oil in the oil collecting tank 5 can flow into the oil inlet of the bearing housing 11 under the action of gravity. Therefore, no additional power device is required for the flow of lubricating oil between the oil collecting tank 5 and the bearing housing 11, which simplifies the structure of the lubrication system.

[0048] The lubrication system of the present disclosure drives the conveyor chain 10 to move in the oil supply pipeline 4 through the driving device, so that the conveyor chain 10 can convey the lubricating oil in the oil storage tank 3 to the oil collecting tank 5. This lubrication system can provide lubricating oil for the oil inlet of the bearing housing 11, thereby providing lubricating oil for the bearing assembly.

[0049] As an example, continue to refer to Figure 1 and Figure 2 , the bottom of the oil collecting tank 5 is communicated with the oil inlet of the bearing housing 11 through a transition oil pipe 6, but not limited thereto. As an example, the lubrication system includes two transition oil pipes 6, and the two transition oil pipes 6 are arranged at intervals along the circumferential direction of the rotating shaft 1, but not limited thereto.

[0050] Further, in order to improve the transmission efficiency of the lubricating oil, an oil storage bin 126 is provided on the transmission chain 10. The oil storage bin 126 can transmit the lubricating oil in the oil storage tank 3 to the oil collection tank 5 and pour the lubricating oil into the oil collection tank 5 after reaching the oil collection tank 5.

[0051] Referring to Figure 2 , in this embodiment, the transmission chain 10 moves in the clockwise direction (as indicated by the arrow in the figure). During the upward movement of the transmission chain 10 from the oil storage tank 3 to the oil collection tank 5, the oil storage bin 126 can store lubricating oil. When this part of the transmission chain 10 enters the oil collection tank 5, the lubricating oil in the oil storage bin 126 can be poured into the oil collection tank 5, so that the transmission chain 10 transmits the lubricating oil in the oil storage tank 3 to the oil collection tank 5, but not limited thereto. In this embodiment, the transmission chain 10 is annular, and during the rotation of the gear 7, the transmission chain 10 can remain engaged with the gear 7.

[0052] Referring to Figure 3 , as an example, in order to improve the reliability of the transmission chain 10, the transmission chain 10 includes a plurality of chain links 12 that are rotatably connected to each other, and the oil storage bin 126 is provided on at least one of the plurality of chain links 12.

[0053] According to the requirements of the lubrication system, the oil storage bin 126 is provided on at least one of the plurality of chain links 12. For example, but not limited to, a single chain link 12 of the transmission chain 10 is provided with the oil storage bin 126, which is suitable for a shafting with a relatively small demand for lubricating oil.

[0054] As an example, each chain link 12 in this embodiment is provided with an oil storage bin 126. After each chain link 12 enters the oil collection tank 5, it can pour the lubricating oil in its oil storage bin 126 into the oil collection tank 5, so that the lubricating oil converges in the oil collection tank 5 and provides lubricating oil to the oil inlet of the bearing block 11, which is particularly suitable for a shafting with a relatively large demand for lubricating oil.

[0055] Referring to Figure 1 and Figure 4 , in order to improve the operating reliability of the lubrication system, the lubrication system further includes a gear 7 that matches the transmission chain 10. The gear 7 is rotatably connected to the oil collection tank 5, and each chain link 12 is provided with a tooth portion 127 that meshes with the gear 7, and the tooth portion 127 is meshed and connected with the gear 7. Figure 1 In

[0056] , in order to show the connection relationship between the gear 7 and the oil collection tank 5, the top cover of the oil collection tank 5 is removed.

[0057] In this embodiment, the conveyor chain 10 is meshed and connected to the bottom of the gear 7, but not limited thereto. According to needs, the conveyor chain 10 can also be meshed and connected to the top of the gear 7.

[0058] Continuing to refer to Figure 3 , in this embodiment, adjacent chain links 12 are relatively rotatably connected so as to be able to mesh reliably with the gear 7, thereby further improving the reliability of the lubrication system. As an example, adjacent chain links 12 are rotatably connected by a pin shaft 13, but not limited thereto.

[0059] Referring to Figure 5 , in this embodiment, the chain link 12 includes a transmission block 121 and a connecting column 122. The connecting column 122 is fixed to the first end of the transmission block 121. A column hole 123 matching the connecting column 122 is recessed in the end face of the second end of the transmission block 121. The connecting column 122 of one chain link 12 is inserted into the column hole 123 of another adjacent chain link 12, so that the connecting column 122 and the transmission block 121 are rotatably connected.

[0060] In this embodiment, by providing the connecting column 122 at the first end of the transmission block 121 and providing the column hole 123 matching the connecting column 122 at the second end, the transmission block 121 and the connecting column 122 can be stably connected, further improving the connection reliability of the conveyor chain 10.

[0061] Continuing to refer to Figure 5 , two adjacent chain links 12 are rotatably connected by a pin shaft 13. A first pin shaft hole 124 for the pin shaft 13 to pass through is provided in the transmission block 121 of one chain link 12. A second pin shaft hole 125 for the pin shaft 13 to pass through is provided in the connecting column 122 of another chain link 12 adjacent to the transmission block 121 of one chain link 12. The pin shaft 13 is inserted into the first pin shaft hole 124 and the second pin shaft hole 125 at the same time, so that the adjacent chain links 12 are connected together. In this way, the connection reliability of the adjacent chain links 12 is improved, and accidental disconnection is avoided.

[0062] Further, the pin shaft 13 extends in a first direction, the connecting column 122 extends in a second direction, the column hole 123 is an oval hole, the column hole 123 extends recessedly from the head end face of the transmission block 121 towards the tail of the transmission block 121, the long axis of the oval hole extends in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other, wherein the second direction is parallel to the direction in which the transmission block 121 extends from the head to the tail. With such a setting, the adjacent chain links 12 can rotate freely, so as to mesh reliably with the gear 7, further improving the use reliability of the conveyor chain 10.

[0063] In this embodiment, the long axis of the waist-shaped hole extends along the third direction, so that the connecting column 122 can swing along the third direction around the pin shaft 13 relative to the transmission block 121, so as to adapt to the oil supply pipeline 4 and can reliably engage with the gear 7, thereby improving the reliability of the movement of the conveyor chain 10.

[0064] As an example, continue to refer to Figure 5 In this embodiment, the head of the connecting column 122 is fixed to the tail of the transmission block 121, and the end surface of the head of the transmission block 121 is recessed with a column hole 123 matching the connecting column 122. The connecting column 122 of one link 12 is inserted into the column hole 123 of another link 12 adjacent to its tail.

[0065] The head of the transmission block 121 defined in this embodiment is located in front of the tail in the advancing direction of the conveying chain 10 , but the present invention is not limited thereto.

[0066] As an example, the oil storage bin 126 is recessed from the head end surface of the transmission block 121 toward the tail of the transmission block 121. During the upward movement of the conveyor chain 10, the head of the transmission block 121 located in the upward section is located above the tail, so that the opening of the oil storage bin 126 faces upward, and the lubricating oil can be stored in the oil storage bin 126 to avoid scattering, so that the lubricating oil can be transferred to the oil collecting tank 5. Furthermore, the oil storage bin 126 and the column hole 123 are spaced apart in the first direction, which improves the space utilization rate of the chain link 12, but is not limited thereto.

[0067] Reference Figure 4 As an example, a tooth groove capable of meshing with the gear 7 is formed on one side of the chain link 12 facing the gear 7, and the tooth groove can mesh with the tooth portion of the gear 7 to drive the conveyor chain 10 to move through the rotation of the gear 7. In this embodiment, a tooth groove is provided on the side of each chain link 12 to mesh with the tooth portion of the gear 7.

[0068] Reference Figure 5 In order to further improve the reliability of the lubrication system, at least two tooth grooves are provided on the chain link 12, and at least two tooth grooves are arranged at intervals in the rotation direction of the gear 7, and the tooth portion 127 is located between the two tooth grooves. In this way, the gear 7 and the chain link 12 can be reliably engaged, and the chain link 12 can be prevented from accidentally shaking relative to the gear 7, thereby improving the movement reliability of the conveyor chain 10.

[0069] In this embodiment, the tooth groove is formed by the side depression of the transmission block 121 (such as Figure 5 As required, the tooth portion 127 may be formed to protrude from the side of the transmission block 121 (not shown).

[0070] As required, the conveying chain 10 in the oil collecting tank 5 will be exposed from the oil supply pipeline 4 so that at least one chain link 12 of the conveying chain 10 can be meshed and connected with the gear 7, but the present invention is not limited thereto.

[0071] Furthermore, in order to avoid leakage of lubricating oil and improve the reliability of the lubrication system, a seal is provided between the oil supply pipeline 4 and the oil collecting tank 5 to avoid leakage of lubricating oil at the connection between the oil supply pipeline 4 and the oil collecting tank 5, but this is not limited to this.

[0072] return Figure 2 As an example, in order to allow the lubricating oil in the inner cavity of the bearing seat 11 to flow smoothly so as to take away the heat generated by the relative rotation between the rotating shaft 1 and the slider 2, the oil storage tank 3 is arranged below the bearing seat 11, and an oil return port 9 is arranged at the bottom end of the bearing seat 11, and the oil return port 9 is connected to the oil storage tank 3.

[0073] As an example, the oil return port 9 is located directly above the oil storage tank 3, and the top of the oil storage tank 3 is open. The lubricating oil flowing out of the oil return port 9 can drip into the oil storage tank 3 under the action of gravity, but this is not limited to this.

[0074] Optionally, the oil return port 9 and the oil storage tank 3 are connected via an oil return pipeline (not shown), and the lubricating oil in the bearing seat 11 can smoothly flow back to the oil storage tank 3 under the action of its own gravity for the next circulation.

[0075] Continue to refer to Figure 2 The oil collecting tank 5 is provided with a first chain inlet and a first chain outlet, and the oil storage tank 3 is provided with a second chain inlet and a second chain outlet. In this embodiment, the first chain inlet is located at the left end of the oil collecting tank 5, and the first chain outlet is located at the right end of the oil collecting tank 5. The second chain inlet is located at the right end of the oil storage tank 3, and the second chain outlet is located at the left end of the oil storage tank 3.

[0076] The oil supply pipeline 4 includes a first oil supply pipe 41 and a second oil supply pipe 42. The upper end of the first oil supply pipe 41 is connected between the first chain outlet and the second chain inlet, and the second oil supply pipe 42 is connected to the first chain inlet and the second chain outlet. In this way, a circulating oil circuit is formed between the oil collecting tank 5 and the oil storage tank 3, so that the conveying chain 10 moves and the lubricating oil is conveyed to the oil collecting tank 5.

[0077] As an example, the distance between the port of the first oil supply pipe 41 and the port of the second oil supply pipe 42 in the oil storage tank 3 is less than the dimension of the link 12 along the extending direction of the conveyor chain 10. They are spaced between the port of the first oil supply pipe 41 and the port of the second oil supply pipe 42. The lubricating oil in the oil storage tank 3 can enter the oil supply pipeline 4 through the ports of the first oil supply pipe 41 and the second oil supply pipe 42, and then be conveyed to the oil collection tank 5 through the conveyor chain 10. With this arrangement, it is avoided that the link 12 gets stuck with the port of the first oil supply pipe 41 or the port of the second oil supply pipe 42 during the movement, thus improving the reliability of the movement of the conveyor chain 10.

[0078] Optionally, the conveyor chain 10 continuously extends circumferentially around the rotating shaft 1, the oil supply pipeline 4 continuously extends in the oil storage tank 3 (not shown in the figure), and communication ports are provided on the pipe wall of the oil supply pipeline 4 located in the oil storage tank 3. The lubricating oil in the oil storage tank 3 can enter the oil supply pipeline 4 through the communication ports on the pipe wall, and then be conveyed to the oil collection tank 5 through the conveyor chain 10. With this arrangement, the oil supply pipeline 4 continuously extends in the oil storage tank 3, avoiding the hidden danger of the link 12 getting stuck with the end of the oil supply pipeline 4, thus further improving the reliability of the use of the lubrication system.

[0079] Currently, most sliding bearings are started and circulated for oil supply by a lubricating pump powered by electricity. However, under specific working conditions, such as when the unit is in a power-off state, the lubricating pump cannot work. At this time, the impeller may be in a free rotation state, and at this time, the bearing bush and the main shaft are in a dry friction state. Operating in this state may cause the bearing bush to fail.

[0080] Continue to refer to Figure 1 , in an exemplary embodiment of the present disclosure, the driving device includes a fan 8, and the fan 8 is connected to the gear 7. By the rotation of the fan 8, the gear 7 is driven to rotate. With this arrangement, the fan 8 can drive the gear 7 to rotate when it rotates under the action of external wind force, and then drive the conveyor chain 10 to move, so as to provide power for the lubrication system, which is energy-saving and environmentally friendly, and does not depend on the operating state of the wind power generation unit. Even in the failure state of the wind power generation unit (such as when the unit is in a power-off state), the lubrication system can still operate normally, further improving the reliability of the lubrication system.

[0081] Combined with Figure 1 and Figure 2 , the fan 8 is arranged outside the nacelle 14 so as to be blown by the wind outside the nacelle 14 and rotate. Further, the fan 8 and the nacelle 14 are spaced apart to avoid the fan 8 colliding with the nacelle 14 during rotation, but it is not limited thereto.

[0082] Further, continue to refer to Figure 2, the oil sump 5 is arranged outside the engine room 14. To improve the reliability of the lubrication system and prevent foreign objects or rainwater from entering the oil sump 5, the top of the oil sump 5 is closed, and the gear 7 is rotatably arranged in the inner cavity of the oil sump 5.

[0083] As needed, the drive device can also be an external power source, such as an external battery. This external power source drives the gear 7 to rotate, and the rotation of the gear 7 further drives the conveyor chain 10 to move, so as to provide power for the lubrication system.

[0084] In the embodiment of the present disclosure, the lubrication system provided with the drive device does not depend on the operating state of the wind turbine generator set. When the unit is in a power-off state, the lubrication system can still operate normally, thus improving the reliability of the lubrication system.

[0085] On the other hand, the present disclosure provides a main shaft system. The main shaft system includes a shafting and the lubrication system as described above. The shafting includes a rotating shaft 1 and a bearing seat 11. The rotating shaft 1 is rotatably arranged in the mounting hole of the bearing seat 11. An oil inlet hole for allowing lubricating oil to flow in is provided on the bearing seat 11, and the lubrication system is communicated with the oil inlet hole.

[0086] Continue to refer to Figure 2 , the shafting further includes a plurality of sliders 2 arranged between the bearing seat 11 and the rotating shaft 1. The plurality of sliders 2 are arranged at intervals along the circumferential direction of the rotating shaft 1. As an example, the slider 2 in this embodiment is a radial slider, the bearing seat 11 is a radial bearing seat, and the slider 2 is arranged on the radial outer side of the rotating shaft 1 and between the rotating shaft 1 and the bearing seat 11, but not limited thereto.

[0087] On the other hand, the present disclosure also provides a wind turbine generator set. The wind turbine generator set includes a generator, an impeller, and the main shaft system as described above. The two ends of the rotating shaft 1 are respectively connected to the impeller and the rotor of the generator.

[0088] The lubrication system provided by the present disclosure conveys the lubricating oil in the oil storage tank 3 to the oil sump 5 through the conveyor chain 10 and pours the lubricating oil into the oil sump 5. The lubricating oil flows into the bearing seat 11 through the transition oil pipe 6 under the action of gravity, so as to provide lubrication for the slider 2 and the rotating shaft 1. Further, an oil return port 9 is provided at the bottom of the bearing seat 11. The lubricating oil in the bearing seat 11 flows back into the oil storage tank 3 located below the bearing seat 11 under the action of gravity. Therefore, during the process of the lubricating oil flowing from the oil sump 5 to the bearing seat 11 and from the bearing seat 11 to the oil storage tank 3, no additional power is required, which simplifies the structure of the lubrication system.

[0089] Further, in this embodiment, the driving device includes a fan 8. The fan 8 is rotatably connected to the oil collecting tank 5, and the fan 8 is connected to the gear 7 so that the rotation of the fan 8 drives the gear 7 to rotate, thereby driving the conveyor chain 10 to convey lubricating oil for the lubrication system. It does not depend on the operating state of the wind turbine generator. Even in the fault state of the wind turbine generator (such as when the unit has no power), the lubrication system can still operate normally, further improving the reliability of the lubrication system.

[0090] At least one link 12 of the conveyor chain 10 in the present disclosure is provided with an oil storage chamber 126. During the upward movement of the oil storage chamber 126 from the oil storage tank 3 to the oil collecting tank 5, the opening of the oil storage chamber 126 faces upward. At this time, the lubricating oil in the oil storage chamber 126 is not easily scattered, so that it can be conveyed to the oil collecting tank 5. In this way, the conveying efficiency of the lubricating oil is improved by setting the oil storage chamber 126.

[0091] Further, the connecting column 122 can be inserted into the column hole 123 of the transmission block 121 of another adjacent link 12 and is connected by a pin shaft 13. The column hole 123 is an oval hole, and the extending direction of the long axis of the oval hole is perpendicular to the extending direction of the connecting column 122 and the extending direction of the pin shaft 13 at the same time, so that the connecting column 122 can swing around the pin shaft 13 relative to the transmission block 121 along the third direction, so as to be able to adapt to the oil supply pipeline 4 and can be reliably engaged with the gear 7, improving the reliability of the movement of the conveyor chain 10.

[0092] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0093] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise stated, the meaning of "plurality" is two or more.

[0094] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, or a communication connection. It can be directly connected, or indirectly connected through an intermediate medium. It can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0095] The features, structures, or characteristics described in the present disclosure may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to give a full understanding of the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure can be practiced without one or more of the specific details, or other methods, components, materials, etc. can be used. In other cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

Claims

1. A lubrication system, characterized in that, Applicable to the shafting of a wind turbine generator set, the shafting includes a rotating shaft (1) and a bearing housing (11), the rotating shaft (1) is rotatably arranged in the bearing housing (11), and an oil inlet for allowing lubricating oil to flow in is arranged on the bearing housing (11). The lubrication system includes: An oil storage tank (3) for storing lubricating oil; An oil collecting tank (5) for being arranged above the oil inlet of the bearing housing (11) and being capable of communicating with the oil inlet; An oil supply pipeline (4) for communicating the oil collecting tank (5) with the oil storage tank (3); A conveyor chain (10) movably arranged in the oil supply pipeline (4) to be capable of conveying the lubricating oil in the oil storage tank (3) to the oil collecting tank (5); A driving device for driving the conveyor chain (10) to move in the oil supply pipeline (4).

2. The lubrication system according to claim 1, wherein An oil storage bin (126) is arranged on the conveyor chain (10). The oil storage bin (126) can convey the lubricating oil in the oil storage tank (3) to the oil collecting tank (5) and pour the lubricating oil into the oil collecting tank (5) after reaching the oil collecting tank (5).

3. The lubrication system according to claim 2, characterized in that, The conveyor chain (10) includes a plurality of chain links (12) rotatably connected to each other, and the oil storage bin (126) is arranged on at least one of the plurality of chain links (12).

4. The lubrication system according to claim 3, wherein The chain link (12) includes a transmission block (121) and a connecting column (122). The connecting column (122) is fixed to the first end of the transmission block (121). A column hole (123) matching the connecting column (122) is recessed on the end face of the second end of the transmission block (121). The connecting column (122) of one chain link (12) is inserted into the column hole (123) of another chain link (12) adjacent to its tail.

5. The lubrication system according to claim 4, characterized in that, Adjacent two chain links (12) are rotatably connected by a pin shaft (13). A first pin shaft hole (124) for the pin shaft (13) to pass through is arranged on the transmission block (121) of one chain link (12). A second pin shaft hole (125) for the pin shaft (13) to pass through is arranged on the connecting column (122) of another chain link (12) adjacent to the transmission block (121) of one chain link (12). The pin shaft (13) is simultaneously inserted into the first pin shaft hole (124) and the second pin shaft hole (125) to connect the adjacent chain links (12) together.

6. The lubrication system according to claim 5, characterized in that, The pin shaft (13) extends in a first direction, the connecting column (122) extends in a second direction, the column hole (123) is an oval hole, the column hole (123) recessedly extends from the head end face of the transmission block (121) towards the tail of the transmission block (121). The long axis of the oval hole extends in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other, wherein the second direction is parallel to the direction in which the transmission block (121) extends from the head to the tail.

7. The lubrication system according to claim 4, characterized in that, The head of the connecting column (122) is fixed to the tail of the transmission block (121), the column hole (123) is arranged at the head of the transmission block (121), the oil storage chamber (126) is recessed from the end face of the head of the transmission block (121) towards the tail of the transmission block (121), and the oil storage chamber (126) and the column hole (123) are arranged at intervals in a first direction.

8. The lubrication system according to any one of claims 3-7, characterized in that The lubrication system further includes a gear (7) matching with the conveyor chain (10), the gear (7) is rotatably connected to the oil collecting tank (5), each link (12) is provided with a tooth portion (127) meshing with the gear (7), and the tooth portion (127) is meshingly connected with the gear (7).

9. The lubrication system according to claim 8, characterized in that, The driving device includes a fan (8), the fan (8) is connected to the gear (7), and the rotation of the fan (8) drives the gear (7) to rotate.

10. The lubrication system according to claim 8, characterized in that A tooth groove capable of meshing with the gear (7) is formed on one side of the link (12) facing the gear (7).

11. The lubrication system according to claim 10, characterized in that, At least two tooth grooves are arranged on the link (12), and at least two of the tooth grooves are arranged at intervals in the rotation direction of the gear (7).

12. The lubrication system according to any one of claims 3-7, characterized in that, The oil storage tank (3) is arranged below the bearing seat (11), an oil return port (9) is arranged at the bottom end of the bearing seat (11), and the oil return port (9) is communicated with the oil storage tank (3).

13. The lubrication system according to claim 12, characterized in that, The oil collecting tank (5) is provided with a first chain inlet and a first chain outlet, the oil storage tank (3) is provided with a second chain inlet and a second chain outlet, the oil supply pipeline (4) includes a first oil supply pipe (41) and a second oil supply pipe (42), the upper end of the first oil supply pipe (41) is connected between the first chain outlet and the second chain inlet, and the second oil supply pipe (42) is connected to the first chain inlet and the second chain outlet.

14. The lubrication system according to claim 13, wherein The distance between the port of the first oil supply pipe (41) and the port of the second oil supply pipe (42) located in the oil storage tank (3) is smaller than the dimension of the link (12) in the extending direction of the conveyor chain (10).

15. The lubrication system according to claim 1, characterized in that, The conveyor chain (10) continuously extends circumferentially around the rotating shaft (1), the oil supply pipeline (4) continuously extends in the oil storage tank (3), and a communication port is arranged on the pipe wall of the oil supply pipeline (4) located in the oil storage tank (3).

16. A spindle system, characterized in that, The main shaft system includes a shaft system and the lubrication system according to any one of claims 1-15, the shaft system includes a rotating shaft (1) and a bearing seat (11), the rotating shaft (1) is rotatably arranged in the mounting hole of the bearing seat (11), an oil inlet hole for allowing lubricating oil to flow in is arranged on the bearing seat (11), and the lubrication system is communicated with the oil inlet hole.

17. The spindle system according to claim 16, characterized in that, The shaft system further includes a plurality of sliders (2) arranged between the bearing seat (11) and the rotating shaft (1), and the plurality of sliders (2) are arranged at intervals in the circumferential direction of the rotating shaft (1).

18. A wind turbine generator, characterized in that, The wind turbine generator set includes a generator, an impeller and a main shaft system as described in claim 16 or 17, and two ends of the rotating shaft (1) are respectively connected to the impeller and the rotor of the generator.

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