Wind turbine up-gearbox

Abstract

The present application relates to gear box technical field, especially to wind driven generator speed increasing gear box, lubrication treatment work of gear box, the scheme is through the heat dissipation cylinder arranged vertically, after the impurities in the oil are filtered, the blocked impurities will be deposited and accumulated in the hopper bottom of the heat dissipation cylinder bottom, avoid the problem that too much impurities are accumulated in the filter screen hole and cause blockage;On the other hand, the heat dissipation cylinder is detachably arranged, when the impurities collected in the heat dissipation cylinder need to be cleaned in the later period, the heat dissipation cylinder can be disassembled and cleaned;On this basis, the cleaning assembly is further arranged in the heat dissipation cylinder, that is, the impurities adhered to the filter screen hole on the side wall of the heat dissipation cylinder also has a cleaning effect through the setting of the impurity removing scraper ring and the cleaning auxiliary brush arranged on the outer side surface of the impurity removing scraper ring, to ensure the cleaning effect of the impurities;The bottom end of the hopper bottom is connected with a transparent observation bottle, which provides a judgment for whether to clean the impurities accumulated in the heat dissipation cylinder.

Description

Technical Field

[0001] This invention relates to the field of gearbox technology, and in particular to a speed-increasing gearbox for wind turbine generators. Background Technology

[0002] The gearbox in a wind turbine generator set is an important mechanical component. Its main function is to transmit the power generated by the wind turbine under the action of wind to the generator and enable it to achieve the corresponding speed. The generator set is often installed in windy places such as high mountains, wilderness, beaches, and islands.

[0003] During operation, gearboxes require lubricating fluid to assist their operation. For example, the patent document with publication number CN219953552U discloses a gearbox for offshore wind turbine towers. The specification of the design states that "starting the liquid pump can drive the lubricating oil inside the gearbox through the first connecting pipe into the hollow barrel. Then, the lubricating oil inside the filter box will return to the gearbox through the second connecting pipe, thereby filtering the lubricating oil and preventing the components inside the gearbox from being stuck by impurities and accelerating wear, thus ensuring the stable operation of the internal components of the gearbox."

[0004] The aforementioned method of filtering lubricating oil using a horizontally placed hollow barrel has drawbacks. Over prolonged operation, impurities filtered from the lubricating oil accumulate in the hollow barrel and deposit on its side walls, clogging the filter holes and negatively impacting the circulation of the lubricating oil. Furthermore, the disassembly of the filter mechanism in the filter box, as described above and in existing technologies, is very cumbersome and difficult to clean, posing a significant challenge for on-site operators.

[0005] Therefore, this invention proposes a wind turbine speed-increasing gearbox to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a wind turbine speed-increasing gearbox to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine speed-increasing gearbox, comprising a gearbox body and an oil circulation pipe disposed at one end of the gearbox body; The oil circulation pipe is supported by a support member located on the outer side wall of the gearbox body. The oil circulation pipe is connected to the pump and extends into the top inner cavity of the oil reservoir. An oil return pipe is provided on one side of the oil reservoir, and the other end of the oil return pipe is connected to the gearbox body; A filter assembly is installed in the oil storage tank.

[0008] Preferably, the filter assembly includes an installation cavity located at the center of the bottom end of the oil reservoir, and a sealing groove is provided at the bottom end of the installation cavity. A heat sink is placed inside the oil storage tank, and filter mesh holes are evenly arranged on the side wall of the heat sink.

[0009] Preferably, a mounting cover is fixedly connected to the top opening of the heat sink cylinder by screws, and an input groove is provided at the center of the mounting cover. The inlet of the input tank is circular, and the input tank is inserted into the port of the oil circulation pipe.

[0010] Preferably, a funnel-shaped bottom is provided at the bottom end of the heat dissipation cylinder, and the funnel-shaped bottom is located on the outer side of the bottom of the oil storage cylinder; A sealing chuck is also fixedly installed on the outer wall of the bottom end of the heat sink. The sealing chuck is adapted to be engaged in the sealing groove and is fixed by screws.

[0011] Preferably, an auxiliary component is connected to the bottom end of the bucket-shaped bottom; The auxiliary component includes a threaded cavity at the bottom of the funnel-shaped bottom, which is threadedly connected to a threaded connector tube located at the top of the transparent observation bottle.

[0012] Preferably, a filling structure is also provided at the top of the oil storage tank; The filling structure includes an internally threaded filling port located at the top of the oil reservoir. The internally threaded filling port is sealed by a sealing plug, and a handle is fixedly installed at the top of the sealing plug.

[0013] Preferably, the filtration assembly further includes a cleaning assembly; The cleaning assembly is housed in a heat dissipation cylinder and includes a shaft with a support bar at the top edge. The end of the support bar is fixedly connected to the inner wall of the cleaning scraper ring.

[0014] Preferably, the diameter of the cleaning scraper ring is equal to the diameter of the heat sink cylinder opening; the outer ring sidewall of the cleaning scraper ring contacts the inner sidewall of the heat sink cylinder. The end diameter of the shaft is smaller than the diameter of the threaded cavity at the bottom of the bucket-shaped bottom.

[0015] Preferably, a loading groove is provided on the outer ring sidewall of the impurity removal scraper ring, and the loading groove is configured to be annular; A rubber strip ring is installed in the loading tank, and a cleaning auxiliary brush is installed on the outside of the rubber strip ring.

[0016] Preferably, a set of the impurity removal scraper rings is provided in the heat dissipation cylinder; A set of auxiliary cleaning brushes is provided on the outer ring side wall of the cleaning scraper.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The wind turbine speed-increasing gearbox designed in this invention includes a gearbox body and an oil circulation pipe disposed at one end of the gearbox body. The oil circulation pipe is supported by a support member disposed on the outer side wall of the gearbox body. The oil circulation pipe is connected to a liquid pump and extends into the top inner cavity of an oil storage tank. A return oil pipe is disposed on one side of the oil storage tank, and the other end of the return oil pipe is connected to the gearbox body. A filter assembly is disposed in the oil storage tank. For gearbox lubrication, this solution filters and removes impurities from the circulating oil by installing a filter assembly in the oil reservoir. The radiator is vertically mounted and detachable, and filter mesh is evenly distributed on the radiator to filter and block impurities. The lubricating oil in the gearbox body enters the oil reservoir from the oil circulation pipe and then enters the radiator. After passing through the filter mesh on the side wall of the radiator to block impurities, the oil flows out from the inner cavity of the radiator and finally the clean oil flows back to the gearbox body through the return oil pipe. During this process, on the one hand, the vertically arranged heat sink filters impurities in the oil, and the blocked impurities settle and accumulate at the bottom of the funnel-shaped bottom of the heat sink, avoiding the problem of excessive accumulation of impurities in the filter mesh and causing blockage; on the other hand, the heat sink is detachable, so when it is necessary to clean the impurities collected in the heat sink later, the heat sink can be disassembled for cleaning. Based on this, this solution also includes a cleaning component in the heat sink. This component, consisting of a cleaning scraper ring and an auxiliary cleaning brush on the outer surface of the scraper ring, effectively cleans impurities adhering to the filter mesh on the side wall of the heat sink, ensuring thorough cleaning. In other words, by pulling the shaft, the scraper ring is moved to clean impurities from the inner wall of the heat sink. The cleaned impurities then flow out from the threaded cavity at the bottom of the bucket. Based on this, in order to further improve the cleaning effect, this solution also sets a cleaning auxiliary brush on the outer ring surface of the cleaning scraper ring. During the process of the cleaning scraper ring scraping off impurities from the inner wall of the heat sink, the cleaning auxiliary brush also has a corresponding cleaning effect on the impurities adhering to the filter mesh on the side wall of the heat sink, so as to avoid the problem of excessive accumulation of impurities in the filter mesh causing blockage. Finally, this solution also includes a transparent observation bottle connected to the bottom of the hopper. This transparent observation bottle can be used to observe the sedimentation of impurities and provide a judgment on whether the impurities accumulated in the heat sink should be cleaned, so that the cleaning and maintenance of the heat sink can be carried out in a timely manner. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the front connection of the wind turbine speed-increasing gearbox structure of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structural connection at point A in the middle; Figure 3 This is a schematic diagram of the rear connection of the wind turbine speed-increasing gearbox structure of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structural connection at point B; Figure 5 This is an exploded top view of the structure and connection of the filter assembly of the present invention; Figure 6 for Figure 5 Enlarged schematic diagram of the structural connection at point C; Figure 7 This is an exploded bottom view of the structure and connection of the filter assembly of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structural connection at point D; Figure 9 This is an exploded view showing the structural connection between the heat sink, auxiliary components, and cleaning components of the present invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structural connection at point E in the middle; Figure 11 This is a schematic diagram of a partial structure connection of the impurity removal scraper ring of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram of the structural connection at point F.

[0019] In the diagram: 1. Gearbox body; 2. Oil circulation pipe; 3. Support component; 4. Pump; 5. Oil reservoir; 6. Return oil pipe; 701. Mounting cavity; 702. Sealing groove; 703. Radiator; 704. Filter screen; 705. Mounting cover; 706. Input trough; 707. Sealing chuck; 708. Bucket-shaped bottom; 801. Threaded cavity; 802. Threaded connector tube; 803. Transparent observation bottle; 901. Internal thread filling port; 902. Sealing plug; 903. Handle body; 1001. Shaft; 1002. Support bar; 1003. Impurity removal scraper ring; 1101. Loading trough; 1102. Rubber strip ring; 1103. Cleaning auxiliary brush. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-12A wind turbine speed-increasing gearbox includes a gearbox body 1 and an oil circulation pipe 2 disposed at one end of the gearbox body 1. The oil circulation pipe 2 is supported by a support member 3, which is located on the outer side wall of the gearbox body 1. The oil circulation pipe 2 is connected to the pump 4 and extends into the top cavity of the oil storage tank 5. An oil return pipe 6 is provided on one side of the oil storage tank 5, and the other end of the oil return pipe 6 is connected to the gearbox body 1; a filter assembly is provided in the oil storage tank 5.

[0022] According to the appendix Figure 1 -Appendix Figure 7 As shown, for the lubrication of the gearbox, this solution filters and removes impurities from the circulating oil by setting a filter assembly in the oil reservoir 5; the heat sink 703 is vertically and detachably set, and filter mesh 704 is evenly arranged on the heat sink 703 to filter and block impurities.

[0023] The lubricating oil in the gearbox body 1 enters the oil storage tank 5 from the oil circulation pipe 2 and then enters the heat sink 703. After that, it passes through the filter screen 704 on the side wall of the heat sink 703 to filter and block impurities, and the oil flows out from the inner cavity of the heat sink 703. Finally, the clean oil flows back to the gearbox body 1 from the return oil pipe 6.

[0024] During this process, on the one hand, the vertically arranged heat sink 703 filters impurities in the oil, and the blocked impurities will settle and accumulate at the bottom of the funnel-shaped bottom 708 of the heat sink 703, avoiding the problem of excessive accumulation of impurities in the filter mesh 704 and causing blockage; on the other hand, the heat sink 703 is detachable, so when it is necessary to clean the impurities collected in the heat sink 703 later, the heat sink 703 can be disassembled for cleaning.

[0025] Based on this, the solution also includes a cleaning component in the heat sink 703. Specifically, the cleaning scraper 1003 and the cleaning auxiliary brush 1103 on the outer ring surface of the scraper 1003 have a cleaning effect on the impurities adhering to the filter mesh 704 on the side wall of the heat sink 703, so as to ensure the cleaning effect of the impurities.

[0026] Furthermore, this solution also has a transparent observation bottle 803 connected to the bottom of the hopper-shaped bottom 708. The transparent observation bottle 803 can be used to observe the sedimentation of impurities and provide a judgment on whether the impurities accumulated in the heat sink 703 need to be cleaned, so that the cleaning and maintenance of the heat sink 703 can be carried out in a timely manner.

[0027] Combined with the appendix Figure 8 -Appendix Figure 10As shown, the use of the filter assembly includes an installation cavity 701 located at the center of the bottom end of the oil reservoir 5, with a sealing groove 702 at the bottom end of the installation cavity 701; a heat sink 703 is placed in the oil reservoir 5, and filter mesh 704 is evenly arranged on the side wall of the heat sink 703; an installation cover 705 is fixedly connected to the top opening of the heat sink 703 by screws, and a filter mesh 704 is located in the middle of the installation cover 705. An input trough 706 is provided at the core position; the opening of the input trough 706 is circular, and the input trough 706 is inserted into the opening of the oil circulation pipe 2; a bucket-shaped bottom 708 is provided at the bottom end of the heat sink 703, and the bucket-shaped bottom 708 is located on the outer side of the bottom of the oil storage tank 5; a sealing chuck 707 is also fixedly provided on the outer side wall of the bottom end of the heat sink 703, and the sealing chuck 707 is adapted to be snapped into the sealing groove 702 and fixed by screws.

[0028] The installation and use of the radiator 703 involves first installing the mounting cover 705 at the top opening of the radiator 703, that is, covering the top opening of the radiator 703 with the mounting cover 705, and then fixing it with screws. Then, the radiator 703 is inserted into the mounting cavity 701 at the bottom of the oil reservoir 5 until the sealing chuck 707 is engaged in the sealing groove 702. At the same time, the input groove 706 on the mounting cover 705 is connected to the opening of the oil circulation pipe 2, that is, connected to the opening of the oil circulation pipe 2 extending into the oil reservoir 5. The purpose is to ensure that the oil input from the oil circulation pipe 2 enters the radiator 703.

[0029] Finally, the sealing chuck 707 is fixed in place by screws. The use of the heat sink 703 is to filter the oil flowing in from the oil circulation pipe 2, and the filtered oil flows back to the gearbox body 1 from the return oil pipe 6.

[0030] Combined with the appendix Figure 7 and attached Figure 9 As shown, this solution also includes an auxiliary component connected to the bottom of the bucket 708.

[0031] The auxiliary component includes a threaded cavity 801 located at the bottom end of the funnel-shaped bottom 708. The threaded cavity 801 is threadedly connected to a threaded connecting head tube 802, which is located at the top of the transparent observation bottle 803.

[0032] The purpose of this auxiliary component is to provide an observation and judgment function for the impurities filtered and blocked in the heat sink 703. After the heat sink 703 filters and blocks impurities in the oil, the blocked impurities will settle into the bottom of the funnel 708, which then enters the transparent observation bottle 803. The state of impurity sedimentation in the transparent observation bottle 803 is used to judge the filtration status of the oil. For example, under long-term operation, if there is little impurity sedimentation in the transparent observation bottle 803 or if the bottle is not completely filled, it is not necessary to disassemble and clean the heat sink 703. In this case, it can be assumed that little impurity has been filtered from the oil, and little impurity has accumulated in the transparent observation bottle 803. Therefore, it is not necessary to disassemble and clean the heat sink 703, and it can continue to be used.

[0033] However, if the transparent observation bottle 803 is filled with sediment, it is believed that the heat sink 703 has blocked and filtered a lot of impurities in the oil, and there may even be a lot of accumulation at the bottom of the bucket 708 or even in the heat sink 703. In order to ensure the normal use of lubricating oil and the normal operation of the circulation, it is necessary to disassemble, clean or replace the heat sink 703 in the oil storage tank 5 in time to ensure the stability of the gearbox body 1 in operation.

[0034] Then from the appendix Figure 5 and appendix Figure 7 As shown, the disassembly of the heat sink 703 is performed by releasing the fixing of the sealing chuck 707, and then removing the heat sink 703.

[0035] Combined with the appendix Figure 10 -Appendix Figure 12 As shown, when it is necessary to clean the impurities filtered and blocked in the heat sink 703, this solution also provides a cleaning component in the heat sink 703.

[0036] It includes a shaft 1001, and a support bar 1002 is provided on the top side of the shaft 1001. The end of the support bar 1002 is fixedly connected to the inner wall of the impurity removal scraping ring 1003. The ring diameter of the impurity removal scraping ring 1003 is equal to the diameter of the opening of the heat dissipation cylinder 703. The outer ring side wall of the impurity removal scraping ring 1003 contacts the inner wall of the heat dissipation cylinder 703. The end diameter of the shaft 1001 is smaller than the diameter of the bottom threaded cavity 801 of the bottom of the bucket-shaped bottom 708.

[0037] In other words, during the installation of the heat sink 703, before fixing the mounting cover 705 to the top opening of the heat sink 703, the impurity removal scraper 1003 is placed in the heat sink 703. Then, the mounting cover 705 is fixed to the top opening of the heat sink 703 with screws. Next, the heat sink 703 is inserted from the mounting cavity 701 into the oil reservoir 5. Finally, the sealing chuck 707 is fixed in the sealing groove 702. After that, the transparent observation bottle 803 is installed.

[0038] During this process, the shaft 1001 connected to the inner support bar 1002 of the impurity removal scraper 1003 will protrude from the threaded cavity 801 of the bottom of the bucket 708. That is, the impurity removal scraper 1003 is in a movable state in the heat dissipation cylinder 703 and will move down under its own gravity. The impurity removal scraper 1003 will reach the bottom of the inner cavity of the heat dissipation cylinder 703. When installing the transparent observation bottle 803, the shaft 1001 needs to be pushed towards the heat dissipation cylinder 703 until the bottom end of the shaft 1001 reaches the position of the threaded cavity 801. Then, the threaded connecting head tube 802 at the top of the transparent observation bottle 803 is threadedly connected to the threaded cavity 801. Tightening the two will complete the installation of the transparent observation bottle 803. At this time, the shaft 1001 will move down to the bottom of the inner cavity of the transparent observation bottle 803.

[0039] Alternatively, when installing the heat sink 703, the transparent observation bottle 803 can be installed at the bottom of the funnel-shaped bottom 708 in advance. After that, the impurity removal scraper ring 1003 is placed in the heat sink 703, at which point the bottom of the shaft 1001 will enter the bottom of the inner cavity of the transparent observation bottle 803. Then, the installation cover 705 is installed at the top opening of the heat sink 703, and finally the heat sink 703 is installed in the inner cavity of the oil storage tank 5.

[0040] When observing the state of impurity sedimentation in the transparent observation bottle 803 later, if it is necessary to clean the collected impurity sedimentation, it is not necessary to remove the heat sink 703 during this process; first, disassemble the transparent observation bottle 803. After removing the transparent observation bottle 803, if it is necessary to clean the impurities adhering to the inner wall of the heat sink 703, the impurity adhering to the inner wall of the heat sink 703 can be scraped off by the impurity removal scraper ring 1003.

[0041] That is, after the transparent observation bottle 803 is disassembled and the shaft 1001 is exposed, the impurity removal scraper 1003 is moved by pulling the shaft 1001 to clean the impurities on the inner wall of the heat dissipation cylinder 703. The cleaned impurities then flow out from the threaded cavity 801 at the bottom of the bucket-shaped bottom 708.

[0042] From the appendix Figure 12As shown, to further improve the cleaning effect, this solution also provides a loading groove 1101 on the outer ring sidewall of the impurity removal scraper ring 1003, which is annular; a rubber strip ring 1102 is provided in the loading groove 1101, and a cleaning auxiliary brush 1103 is provided on the outside of the rubber strip ring 1102; a set of impurity removal scraper rings 1003 is provided in the heat sink 703; a set of cleaning auxiliary brushes 1103 is provided on the outer ring sidewall of the impurity removal scraper ring 1003; during the process of the impurity removal scraper ring 1003 scraping impurities off the inner sidewall of the heat sink 703, the cleaning auxiliary brushes 1103 also have a corresponding cleaning effect on the impurities adhering to the filter mesh 704 on the sidewall of the heat sink 703, avoiding the problem of excessive accumulation of impurities in the filter mesh 704 causing blockage.

[0043] After cleaning the impurities collected in the heat sink 703 and the transparent observation bottle 803, the transparent observation bottle 803 is installed. The impurities after cleaning will inevitably contain oil. After cleaning out the mixture of impurities and oil, it can be placed in a container to stand. The clean oil after standing can then be added to the oil storage tank 5 for use.

[0044] From the appendix Figure 7 -Appendix Figure 8 As shown, this solution also includes a filling structure at the top of the oil reservoir 5; the filling structure includes an internal thread filling port 901 located at the top of the oil reservoir 5, the internal thread filling port 901 is sealed by a sealing plug 902, and a handle body 903 is fixedly installed at the top of the sealing plug 902.

[0045] In other words, after the impurities and oil mixture that has been cleaned out have been left to stand, the clean oil can be added to the oil storage tank 5. The clean oil can be extracted using a syringe. Then, the sealing plug 902 is opened, and the oil is added through the internal thread filling port 901. After the filling is completed, the sealing plug 902 is used to seal the internal thread filling port 901.

[0046] During long-term operation, as the oil is consumed, in order to ensure the amount of oil used, new oil can be added to the oil reservoir 5 through the internal thread filling port 901 as needed to ensure the lubrication requirements of the gearbox body 1.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind turbine speed-increasing gearbox, including a gearbox body (1) and an oil circulation pipe (2) disposed at one end of the gearbox body (1); The oil circulation pipe (2) is supported by a support member (3) which is located on the outer side wall of the gearbox body (1). The oil circulation pipe (2) is connected to the pump (4) and extends into the top cavity of the oil storage tank (5). An oil return pipe (6) is provided on one side of the oil storage tank (5), and the other end of the oil return pipe (6) is connected to the gearbox body (1); Its features are: A filter assembly is installed in the oil storage tank (5).

2. The wind turbine speed-increasing gearbox according to claim 1, characterized in that: The filter assembly includes an installation cavity (701) located at the center of the bottom end of the oil reservoir (5) and a sealing groove (702) located at the bottom end of the installation cavity (701). A heat sink (703) is placed in the oil storage tank (5), and filter mesh (704) is evenly arranged on the side wall of the heat sink (703).

3. The wind turbine speed-increasing gearbox according to claim 2, characterized in that: A mounting cover (705) is fixedly connected to the top opening of the heat sink (703) by screws, and an input slot (706) is provided at the center of the mounting cover (705). The inlet of the input tank (706) is circular, and the input tank (706) is inserted into the inlet of the oil circulation pipe (2).

4. The wind turbine speed-increasing gearbox according to claim 2, characterized in that: A bucket-shaped bottom (708) is provided at the bottom end of the heat sink (703), and the bucket-shaped bottom (708) is located on the outside of the bottom of the oil storage tank (5); A sealing chuck (707) is also fixedly installed on the outer wall of the bottom end of the heat sink (703). The sealing chuck (707) is adapted to be snapped into the sealing groove (702) and fixed by screws.

5. The wind turbine speed-increasing gearbox according to claim 4, characterized in that: An auxiliary component is connected to the bottom end of the bottom of the bucket (708); The auxiliary component includes a threaded cavity (801) located at the bottom end of the funnel-shaped bottom (708), which is threadedly connected to a threaded connecting head tube (802) located at the top of the transparent observation bottle (803).

6. The wind turbine speed-increasing gearbox according to claim 2, characterized in that: A filling structure is also provided at the top of the oil storage tank (5); The filling structure includes an internal thread filling port (901) located at the top of the oil reservoir (5). The internal thread filling port (901) is sealed by a sealing plug (902). A handle body (903) is fixedly installed at the top of the sealing plug (902).

7. The wind turbine speed-increasing gearbox according to claim 5, characterized in that: The filtration assembly also includes a cleaning assembly; The cleaning assembly is housed in the heat sink (703) and includes a shaft (1001). A support bar (1002) is provided on the top side of the shaft (1001), and the end of the support bar (1002) is fixedly connected to the inner wall of the cleaning scraper ring (1003).

8. The wind turbine speed-increasing gearbox according to claim 7, characterized in that: The diameter of the cleaning scraper ring (1003) is equal to the diameter of the opening of the heat sink (703); the outer ring sidewall of the cleaning scraper ring (1003) contacts the inner sidewall of the heat sink (703); The end diameter of the shaft (1001) is smaller than the diameter of the threaded cavity (801) at the bottom of the bucket-shaped bottom (708).

9. The wind turbine speed-increasing gearbox according to claim 8, characterized in that: A loading trough (1101) is provided on the outer ring sidewall of the impurity removal scraping ring (1003), and the loading trough (1101) is configured as an annular shape; A rubber strip ring (1102) is provided in the loading tank (1101), and a cleaning auxiliary brush (1103) is provided on the outside of the rubber strip ring (1102).

10. The wind turbine speed-increasing gearbox according to claim 9, characterized in that: One set of the impurity removal scraping ring (1003) is provided in the heat dissipation cylinder (703); A set of cleaning auxiliary brushes (1103) is provided on the outer ring side wall of the impurity removal scraper ring (1003).

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