A lubricating structure of a wind turbine generator system

Abstract

The application discloses a kind of wind generating set lubricating structure, including gear box, the main shaft of being arranged at the input end of gear box and the bearing of being sleeved in the outside of main shaft are composed of wind generating set, the unit shell of being surrounded in the outside of wind generating set, it is related to wind generating set lubricating technical field.The lubricating oil is again in the form of active lubrication, one aspect is guided lubricating oil to the oil channel of being connected to the input end of gear box by the inside of shaft support and is sent to the input end of gear box and lubricated there, the other aspect is guided lubricating oil to the oil channel of being connected to bearing by the shaft support and bearing support and is sent to bearing and lubricated, can make main shaft, the input end of gear box and bearing are all active lubrication protection measures, has played the original preventive effect of lubricating oil, so that the rotating wear of main shaft, the input end of gear box and bearing rotating place is further reduced compared to passive lubrication mode, and the expected effect of lubrication is good.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a lubrication structure for wind turbine generator sets. Background Technology

[0002] A wind turbine is a power generation device that uses wind energy to rotate a wind turbine, generating mechanical energy, which is then converted into electrical energy by a generator. Wind energy is a renewable and clean energy source with virtually no pollution to the environment. The working principle of a wind turbine is that when the wind blows, the wind turbine rotates under the force of the wind. The rotating mechanism transmits the rotating energy to the generator, which then converts the mechanical energy into electrical energy. This electrical energy is typically transmitted via cables to the power grid or to storage devices for energy storage or supply.

[0003] The patent with publication number CN202222001902.X discloses a lubrication structure for the yaw sliding bearing of a wind turbine generator set. This application utilizes the mounting holes on the frame and a grease bottle to store lubricating grease. During the yaw process of the generator set, the grease is carried into the sliding yaw system for automatic lubrication. It has the advantages of simple structure, low cost and automatic lubrication.

[0004] While this application provides automatic lubrication, its application relies on the sliding yaw system passively driving the grease to lubricate the yaw sliding bearing. Lubrication occurs after existing yaw-induced friction between components, or even after wear, failing to prevent lubrication and thus reducing the effectiveness of the lubricating grease, resulting in insufficient lubrication to meet expectations. Therefore, this application provides a lubrication structure for wind turbine generator sets. Summary of the Invention

[0005] The purpose of this invention is to provide a lubrication structure for wind turbine generator sets to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine generator set lubrication structure, comprising a wind turbine generator set consisting of a gearbox, a main shaft disposed at the input end of the gearbox, and bearings sleeved on the outside of the main shaft, a generator set housing surrounding the outside of the wind turbine generator set, an oil supply mechanism disposed on one side of the generator set housing, and a periodic oiling mechanism disposed inside the oil supply mechanism; the main shaft is composed of a tapered shaft joint and a straight shaft joint, and has a structure that is narrow in the middle and wide at both ends; the periodic oiling mechanism is a set of movable guide rod structures driven by springs inside, and a closed disc with an openable and closed lubricating oil connection channel is fixedly connected to the outside of the guide rod structure; the oil supply mechanism contains lubricating oil communicating with the periodic oiling mechanism; a double cam is fixedly connected to the outside of the main shaft and is movably connected to the end of the guide rod structure; a bearing support and a shaft support are fixedly connected inside the generator set housing, sleeved on the outside of the main shaft and bearings, and with a gap between them; the bearing support and the shaft support have oil passages inside, respectively, to guide lubricating oil to the bearings and the input end of the gearbox.

[0007] As a further embodiment of the present invention: the periodic oiling mechanism includes an oiling cylinder fixedly connected to the unit housing and sleeved on the outside of the guide rod structure. The guide rod structure includes a guide rod with both ends passing through the unit housing and the oiling cylinder respectively, which can introduce lubricating oil into the unit housing; a spring that fixes the oiling cylinder to the guide rod; a closed disc sleeved on the outside of the guide rod, which can open and close the connection channel between the unit housing and the periodic oiling mechanism; and a guide rod ball head fixedly connected to the end of the guide rod. The guide rod structure is movably connected to the double cam through the guide rod ball head.

[0008] As a further embodiment of the present invention: one end of the shaft support is provided with a gearbox inlet with a quarter-circle arc structure, which serves as a gearbox lubricating oil passage.

[0009] As a further embodiment of the present invention: the other end of the shaft support is connected to the bearing support and has a bearing oil supply port with a U-shaped tube structure, which serves as a bearing lubrication oil passage.

[0010] As a further embodiment of the present invention: a screw disc is fixedly connected to one side of the unit's outer casing, and the oil supply mechanism includes an oil supply tank screwed to the screw disc and an oil supply pipe connecting the upper oil cylinder to the oil supply tank.

[0011] As a further embodiment of the present invention: an oil inlet is provided on one side of the oil supply tank, and an oil inlet cap is screwed onto the outside of the oil inlet.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. When the gearbox drives the main shaft to rotate, and the main shaft drives the double cams fixed on it to rotate, the double cams will contact the end of the guide rod structure and gradually push the guide rod structure upward along the axial direction of the guide rod structure. After being pushed up, the guide rod structure will drive the closed disc to move and open the output channel of lubricating oil to the unit housing, so that the lubricating oil can flow along the outer wall of the guide rod structure to the main shaft for maintenance and lubrication. Excess lubricating oil on the main shaft will drip into the gap between the main shaft and the bearing support and the bearing support and remain there. The lubricating oil is actively lubricated. On the one hand, it is delivered to the gearbox input end through the oil passage opened in the bearing support to lubricate the gearbox input end. On the other hand, it is delivered to the bearing through the oil passage opened in the bearing support and the bearing support to lubricate it. This allows the main shaft, gearbox input end and bearing to actively lubricate and protect the main shaft, gearbox input end and bearing, and exert the original preventive effect of lubricating oil. Compared with the passive lubrication method, the rotational wear of the main shaft, gearbox input end and bearing rotation is further reduced, and the expected lubrication effect is good.

[0014] 2. Because the spindle rotates periodically, it also causes the double cam to periodically contact and interact with the guide rod structure, so that the lubricating oil is periodically fed into the unit housing along the guide rod structure for maintenance. This avoids the problem of lubricating oil overflowing faster when too much is fed at once, thus saving on the cost of lubricating oil. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a wind turbine generator lubrication structure according to the present invention;

[0016] Figure 2 This is a schematic diagram of the oil supply mechanism in the lubrication structure of a wind turbine generator set according to the present invention;

[0017] Figure 3 This is a schematic diagram of the wind turbine generator set and the periodic oiling mechanism in the lubrication structure of a wind turbine generator set according to the present invention.

[0018] Figure 4 This is a schematic diagram of the bearing support and shaft support in the lubrication structure of a wind turbine generator set according to the present invention;

[0019] Figure 5 This is a schematic diagram of the gearbox oil supply port in the lubrication structure of a wind turbine generator set according to the present invention;

[0020] Figure 6 This invention relates to a lubrication structure for a wind turbine generator set. Figure 3 Enlarged view of point A in the middle;

[0021] Figure 7 This invention relates to a lubrication structure for a wind turbine generator set. Figure 4Enlarged view of point B in the middle;

[0022] Figure 8 This is a schematic diagram of the bearing oil supply port and gearbox oil supply port in the lubrication structure of a wind turbine generator set according to the present invention.

[0023] In the diagram: 1. Generator casing; 2. Wind turbine generator set; 21. Gearbox; 22. Main shaft; 23. Shaft joint; 24. Bearing; 25. Double cam; 3. Oil supply mechanism; 31. Oil supply tank; 32. Oil supply pipe; 33. Oil inlet; 4. Spiral disc; 5. Periodic oiling mechanism; 51. Oil cylinder; 52. Guide rod; 53. Spring; 54. Sealing disc; 55. Guide rod ball head; 6. Bearing support; 7. Shaft support; 8. Bearing oil supply port; 9. Gearbox oil supply port. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-8In this embodiment of the invention, a wind turbine generator set lubrication structure includes a wind turbine generator set 2 consisting of a gearbox 21, a main shaft 22 disposed at the output end of the gearbox 21, and a bearing 24 sleeved on the outside of the main shaft 22; a generator set housing 1 surrounding the outside of the wind turbine generator set 2; an oil supply mechanism 3 disposed on one side of the generator set housing 1; and a periodic oiling mechanism 5 disposed inside the oil supply mechanism 3. The main shaft 22 is composed of a tapered shaft joint 23 and a straight shaft joint 23, forming a structure that is narrow in the middle and wide at both ends. The periodic oiling mechanism 5 is a set of movable guide rod structures driven by springs inside. A closed disc 54 with an openable and slewable lubricating oil connection channel is fixedly connected to the outside of the guide rod structure. The inside of the oil supply mechanism 3 contains lubricating oil communicating with the periodic oiling mechanism 5. The outside of the main shaft 22 is fixedly connected to... A double cam 25 is movably connected to the end of the guide rod structure. Inside the unit housing 1, a bearing support 6 and a shaft support 7 are fixedly connected, sleeved on the outside of the main shaft 22 and the bearing 24, with a gap between them. The bearing support 6 and the shaft support 7 have oil passages inside to guide lubricating oil to the bearing 24 and the output end of the gearbox 21, respectively. When the gearbox 21 drives the main shaft 22 to rotate, and the main shaft 22 drives the double cam 25 fixed on it to rotate, the double cam 25 will contact the end of the guide rod structure and gradually push the guide rod structure upward along the axial direction of the guide rod structure. After being pushed up, the guide rod structure will drive the closed disc 54 to move and open the output channel of lubricating oil to the inside of the unit housing 1, so that the lubricating oil can flow along the outer wall of the guide rod structure to the main shaft 22 for maintenance and lubrication of the main shaft 22.

[0026] Meanwhile, excess lubricating oil on the spindle 22 drips into the gap between the spindle 22, the bearing support 6, and the shaft support 7 and remains there. The lubricating oil can be delivered to the output end of the gearbox 21 through the oil passage opened inside the shaft support 7 to lubricate it. On the other hand, it can be delivered to the bearing 24 through the oil passage opened in the shaft support 7 and the bearing support 6 to lubricate it. This provides lubrication protection for the spindle 22, the output end of the gearbox 21, and the bearing 24, reducing rotational wear at the rotating parts of the spindle 22, the output end of the gearbox 21, and the bearing 24.

[0027] Furthermore, the periodic rotation of the main shaft 22 will also cause the double cam 25 to periodically contact and interact with the guide rod structure, so that the lubricating oil will also periodically enter the unit housing 1 along the guide rod structure for maintenance, avoiding the problem of lubricating oil overflowing faster when too much is entered at once, thus saving the cost of lubricating oil.

[0028] As a further embodiment of the present invention: the periodic oiling mechanism 5 includes an oiling cylinder 51 fixedly connected to the unit housing 1 and sleeved on the outside of the guide rod structure. The guide rod structure includes a guide rod 52 with both ends respectively inserted into the unit housing 1 and the oiling cylinder 51 and capable of introducing lubricating oil into the unit housing 1; a spring 53 fixedly connecting the oiling cylinder 51 and the guide rod 52; a sealing disc 54 sleeved on the outside of the guide rod 52 and capable of opening and closing the connection channel between the unit housing 1 and the periodic oiling mechanism 5; and a guide rod ball head 55 fixedly connected to the end of the guide rod 52. The guide rod structure is movably connected to the double cam 25 via the guide rod ball head 55. The double cam 25 lifts the guide rod ball head 55, which in turn drives the guide rod 52 to move, causing the originally closed sealing disc 54 of the unit housing 1 to open the oil supply channel of the unit housing 1, so that the lubricating oil can enter the unit housing 1 along the guide rod 52. Similarly, when the double cam 25 does not lift the guide rod ball head 55, the guide rod 52 will drive the sealing disc 54 to contact the unit housing 1 under the elastic action of the spring 53 and close the oil passage of the unit housing 1.

[0029] As a further embodiment of the present invention: a gearbox inlet 9 with a quarter-circle arc structure is provided at one end of the shaft support 7 and serves as a lubricating oil passage for the gearbox 21. The lubricating oil entering the shaft support 7 will be transported along the oil passage to the connection between the gearbox 21 and the main shaft 22 to lubricate the connection between the main shaft 22 and the gearbox 21.

[0030] As a further embodiment of the present invention: the other end of the shaft support 7 is connected to the bearing support 6 and has a bearing oil supply port 8 with a U-shaped tube structure, which serves as the lubricating oil passage for the bearing 24. Similarly, the lubricating oil will be transported to the outside of the bearing 24 through the bearing oil supply port 8 and the bearing 24 will be wetted with lubricating oil to achieve the lubrication effect.

[0031] As a further embodiment of the present invention: a screw plate 4 is fixedly connected to one side of the unit housing 1, and the oil supply mechanism 3 includes an oil supply tank 31 screwed to the screw plate 4 and an oil supply pipe 32 connecting the upper oil cylinder 51 to the oil supply tank 31.

[0032] As a further embodiment of the present invention: an oil inlet 33 is provided on one side of the oil supply tank 31, and an oil inlet cap is screwed onto the outside of the oil inlet 33.

[0033] The working principle of this invention is as follows: When the gearbox 21 drives the main shaft 22 to rotate, and the main shaft 22 drives the double cam 25 fixed on it to rotate, the double cam 25 will contact the end of the guide rod structure and gradually push the guide rod structure upward along the axial direction of the guide rod structure. After being pushed up, the guide rod structure will drive the closed disc 54 to move and open the output channel of lubricating oil to the unit housing 1, so that the lubricating oil can flow along the outer wall of the guide rod structure to the main shaft 22 for maintenance and lubrication of the main shaft 22. Specifically, by the double cam 25 pushing up the guide rod ball head 55, the guide rod ball head 55 drives the guide rod 52 to lift, so that the closed disc 54, which was originally closed with the unit housing 1, will open the oil supply channel of the unit housing 1, so that the lubricating oil can enter the unit housing 1 along the guide rod 52. Similarly, when the double cam 25 does not push up the guide rod ball head 55, the guide rod 52 will drive the closed disc 54 to contact the unit housing 1 under the elastic action of the spring 53 and close the oil passage of the unit housing 1.

[0034] Meanwhile, excess lubricating oil on the spindle 22 drips into the gap between the spindle 22, the bearing support 6, and the shaft support 7 and remains there. The lubricating oil can be delivered to the output end of the gearbox 21 through the oil passage opened inside the shaft support 7 to lubricate it. On the other hand, it can be delivered to the bearing 24 through the oil passage opened in the shaft support 7 and the bearing support 6 to lubricate it. This provides lubrication protection for the spindle 22, the output end of the gearbox 21, and the bearing 24, reducing rotational wear at the rotating parts of the spindle 22, the output end of the gearbox 21, and the bearing 24.

[0035] Furthermore, the periodic rotation of the main shaft 22 will also cause the double cam 25 to periodically contact and interact with the guide rod structure, so that the lubricating oil will also periodically enter the unit housing 1 along the guide rod structure for maintenance, avoiding the problem of lubricating oil overflowing faster when too much is entered at once, thus saving the cost of lubricating oil.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wind turbine lubricating structure, comprising a wind turbine composed of a gear box, a main shaft arranged at an input end of the gear box, and a bearing arranged outside the main shaft, a turbine shell surrounding outside the wind turbine, an oil supply mechanism arranged at one side of the turbine shell, and a periodic oil supply mechanism arranged inside the oil supply mechanism; characterized in that: The main shaft is composed of a conical shaft joint and a straight shaft joint, and has a structure of narrow in the middle and wide at both ends, the periodic oiling mechanism is a group of movable guide rods driven by springs, the outer side of the guide rod structure is fixedly connected with a closed disc which can open and close a lubricating oil connecting channel, the inside of the oil supply mechanism contains lubricating oil which communicates with the periodic oiling mechanism, the outer side of the main shaft is fixedly connected with double cams which are movably connected with the end of the guide rod structure, the inside of the unit shell is fixedly connected with a bearing support and a shaft support which are sleeved on the outer side of the main shaft and the bearing and have a gap between the main shaft and the bearing, the inside of the bearing support and the shaft support is respectively provided with an oil channel which guides lubricating oil to the bearing and the input end of the gearbox.

2. A wind turbine lubrication arrangement according to claim 1, wherein The periodic oiling mechanism includes an oiling cylinder which is fixedly connected with the unit shell and is sleeved on the outer side of the guide rod structure, the guide rod structure includes guide rods which are respectively inserted into the unit shell and the oiling cylinder and can guide lubricating oil into the unit shell, springs which fixedly connect the oiling cylinder and the guide rods, a closed disc which is sleeved on the outer side of the guide rods and can open and close the connecting channel between the unit shell and the periodic oiling mechanism, and guide rod balls which are fixedly connected with the end of the guide rods, the guide rod structure is movably connected with the double cams through the guide rod balls.

3. A wind turbine lubrication arrangement according to claim 2, wherein The inside of the shaft support is provided with a gearbox oil inlet which is a quarter of a circular arc in structure and serves as a lubricating oil channel of the gearbox.

4. A wind turbine lubrication arrangement according to claim 3, wherein The other end of the inside of the shaft support is provided with a bearing oil inlet which is a U-shaped tube in structure and serves as a lubricating oil channel of the bearing.

5. A wind turbine lubrication arrangement according to claim 4, wherein One side of the unit shell is fixedly connected with a screw disc, the oil supply mechanism includes an oil supply tank which is screwed with the screw disc, and an oil supply pipe which communicates the oiling cylinder with the oil supply tank.

6. A wind turbine lubrication arrangement according to claim 5, wherein One side of the oil supply tank is provided with an oil inlet, the outer side of the oil inlet is screwed with an oil inlet cover.

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