A lubricating mechanism in a wind turbine gearbox

Abstract

The utility model relates to wind power gear box lubrication technical field especially relates to a kind of lubricating mechanism in wind driven generator gear box, including gear box assembly, further including generator;The rear end of gear box assembly is provided with generator;Gear box assembly includes transmission input shaft, transmission output shaft, input shaft bearing, output shaft bearing, planetary gear set, electromagnetic oil injection valve, lubricating oil quantity sensor, transmission shaft protective cover.The utility model judges whether the lubricating oil in gear box assembly is short of oil by lubricating oil quantity sensor detecting the oil quantity of lubricating oil in gear box assembly, and under the condition of oil shortage, control electromagnetic oil injection valve to spray lubricating oil in the inside of gear box assembly, lubricating oil is driven by the meshing of planetary gear set and centrifugal effect, so that lubricating oil is fully contacted with transmission mechanism, thereby effectively improve lubricating effect, and reduce the mechanical transmission performance problem caused by lubricating oil excess or too low.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine gearbox lubrication technology, and in particular to a lubrication mechanism in a wind turbine gearbox. Background Technology

[0002] As a core component of the transmission system, the gearbox of a wind turbine generator plays a crucial role in converting the low-speed rotation of the impeller into the high-speed operation of the generator. With the development of the wind power industry towards larger scale and higher efficiency, the gearbox needs to operate stably for a long time under high torque and variable load conditions. Its reliability and durability have become important factors restricting the efficiency of wind power generation and maintenance costs.

[0003] Over time, the lubricating oil inside the gearbox will gradually decrease due to high-temperature evaporation, seal leakage, and splashing loss during gear meshing. Since gearboxes are mostly installed on high-altitude towers, manual inspection and maintenance are difficult and costly, and lubricating oil deficiency often cannot be detected and replenished in time. Once the lubricating oil level is lower than the normal operating requirements, it is difficult to form a complete lubricating film on the gear surface, and the direct contact friction between the gear teeth will intensify, leading to abnormal wear of the gearbox. This will not only reduce the gearbox transmission efficiency and increase operating noise, but may also cause serious failures such as gear tooth breakage and bearing failure, significantly shortening the service life of the gearbox and even threatening the safe and stable operation of the entire wind power generation system. Utility Model Content

[0004] In order to overcome the problem that the internal lubricating oil of existing wind turbine gearboxes is easily depleted over long-term use, and that the lack of lubricating oil and failure to replenish it in time can easily cause abnormal wear of the wind turbine gearbox, this utility model provides a lubrication mechanism in the wind turbine gearbox.

[0005] The technical solution is as follows: A lubrication mechanism in a wind turbine gearbox includes a gearbox assembly and a generator; the generator is disposed at the rear end of the gearbox assembly; the gearbox assembly includes a transmission input shaft, a transmission output shaft, an input shaft bearing, an output shaft bearing, a planetary gear set, an electromagnetic oil injection valve, a lubricating oil quantity sensor, and a transmission shaft protective cover; the transmission output shaft is disposed at the rear end of the transmission input shaft, and the transmission input shaft is connected to the transmission output shaft bearing; the rear end of the transmission output shaft is connected to the input shaft of the generator; a transmission shaft protective cover is disposed on the outside of the transmission input shaft.

[0006] Furthermore, an input shaft bearing is provided on the outside of the transmission input shaft, and the input shaft bearing is connected to the transmission input shaft bearing; an output shaft bearing is provided on the outside of the transmission output shaft, and the output shaft bearing is connected to the transmission output shaft bearing; the transmission shaft protective cover is connected to the input shaft bearing flange.

[0007] Furthermore, the housings of the input shaft bearing and the output shaft bearing are connected by a flange.

[0008] Furthermore, a planetary gear set is provided on the outside of the transmission output shaft, and the overall structure cover of the planetary gear set is fixedly connected to the transmission input shaft, and the internal planetary gears of the planetary gear set are connected to the transmission output shaft gears.

[0009] Furthermore, the overall housing of the planetary gear set is connected to the inner wall teeth of the input shaft bearing and the output shaft bearing.

[0010] Furthermore, an electromagnetic fuel injection valve is provided on the upper end of the overall housing of the input shaft bearing and the output shaft bearing, and the output end of the electromagnetic fuel injection valve is located inside the gearbox assembly.

[0011] Furthermore, a lubricating oil level sensor is provided at the lower end of the overall housing of the input shaft bearing and the output shaft bearing, and the output end of the lubricating oil level sensor is located inside the gearbox assembly.

[0012] The beneficial effects are as follows: The lubricating oil level sensor of this utility model is installed at a specific position in the gearbox assembly to continuously monitor the internal lubricating oil level. During operation, it senses changes in the lubricating oil level, converts the oil level information into an electrical signal, and transmits it to the control system. The control system analyzes and processes the received signal, comparing it with a preset oil level standard value to determine whether the lubricating oil level inside the gearbox assembly is normal. If the detected oil level is lower than the standard value, it is determined to be in a low-oil state. In this low-oil state, the control system sends an opening command to the solenoid injection valve. Upon receiving the signal, the solenoid injection valve actuates, opening the injection channel and spraying lubricating oil into the gearbox assembly. The sprayed lubricating oil first contacts the planetary gear set. As the planetary gear set rotates, the gears mesh and drive each other, causing the lubricating oil to flow. At the same time, the high-speed rotation of the gears generates centrifugal force. Under the centrifugal force, the lubricating oil is thrown to all directions inside the gearbox assembly. Under the combined action of the meshing transmission of the planetary gear set and centrifugal force, the lubricating oil continuously diffuses and gradually covers the transmission mechanism inside the gearbox assembly. The lubricating oil is evenly attached to the surface of the transmission mechanism, forming a lubricating film to achieve full contact. This process ensures that all transmission components inside the gearbox assembly can be effectively lubricated, avoiding wear of components due to lack of oil. At the same time, it avoids energy loss caused by excessive lubricating oil and the problem of decreased mechanical transmission performance caused by insufficient oil, ensuring stable operation of the gearbox assembly.

[0013] By installing a drive shaft guard, the drive shaft input shaft is enclosed, effectively reducing the impact of external debris on the drive shaft input shaft, reducing the chance of damage, and improving transmission safety and service life. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0015] Figure 2 This is a three-dimensional cross-sectional view of the present invention.

[0016] Figure 3 This is a three-dimensional structural diagram of the gearbox assembly of this utility model;

[0017] Figure 4 This is a rear-view perspective three-dimensional structural diagram of the gearbox assembly of this utility model;

[0018] Figure 5 This is a side-view perspective view of the gearbox assembly of this utility model.

[0019] In the attached figures, the following are the reference numerals: 1. Gearbox assembly; 2. Generator; 101. Drive input shaft; 102. Drive output shaft; 103. Input shaft bearing; 104. Output shaft bearing; 105. Planetary gear set; 106. Electromagnetic injection valve; 107. Lubricating oil level sensor; 108. Drive shaft protective cover. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0021] like Figures 1-5 As shown, a lubrication mechanism in a wind turbine gearbox includes a gearbox assembly 1 and a generator 2. The generator 2 is disposed at the rear end of the gearbox assembly 1. The gearbox assembly 1 includes a transmission input shaft 101, a transmission output shaft 102, an input shaft bearing 103, an output shaft bearing 104, a planetary gear set 105, an electromagnetic oil injection valve 106, a lubricating oil quantity sensor 107, and a transmission shaft protective cover 108. The transmission output shaft 102 is disposed at the rear end of the transmission input shaft 101, and the transmission input shaft 101 and the transmission output shaft 102 are connected by bearings. The rear end of the transmission output shaft 102 is connected to the input shaft of the generator 2. The transmission input shaft 101 is provided with a transmission shaft protective cover 108.

[0022] An input shaft bearing 103 is provided on the outside of the transmission input shaft 101, and the input shaft bearing 103 is connected to the transmission input shaft 101 bearing; an output shaft bearing 104 is provided on the outside of the transmission output shaft 102, and the output shaft bearing 104 is connected to the transmission output shaft 102 bearing; the transmission shaft protective cover 108 is connected to the input shaft bearing 103 flange.

[0023] The housings of the input shaft bearing 103 and the output shaft bearing 104 are connected by a flange.

[0024] A planetary gear set 105 is provided on the outside of the transmission output shaft 102, and the overall structure cover of the planetary gear set 105 is fixedly connected to the transmission input shaft 101, and the internal planetary gears of the planetary gear set 105 are connected to the transmission output shaft 102 for gear transmission.

[0025] The overall housing of the planetary gear set 105 is connected to the inner wall teeth of the input shaft bearing 103 and the output shaft bearing 104.

[0026] The drive shaft guard 108 encloses the drive input shaft 101, effectively reducing the impact of external debris on the drive input shaft 101, reducing the probability of damage, and improving transmission safety and service life. Example 2

[0027] Based on Example 1, such as Figures 1-5 As shown, an electromagnetic fuel injection valve 106 is provided on the upper end of the overall housing of the input shaft bearing 103 and the output shaft bearing 104, and the output end of the electromagnetic fuel injection valve 106 is located inside the gearbox assembly 1.

[0028] A lubricating oil level sensor 107 is provided at the lower end of the overall housing of the input shaft bearing 103 and the output shaft bearing 104, and the output end of the lubricating oil level sensor 107 is located inside the gearbox assembly 1.

[0029] The lubricating oil level sensor 107 is installed at a specific location in the gearbox assembly 1 to continuously monitor the internal lubricating oil level. During operation, it senses changes in the lubricating oil level, converts the oil level information into an electrical signal, and transmits it to the control system. The control system analyzes and processes the received signal, comparing it with a preset oil level standard value to determine whether the lubricating oil level inside the gearbox assembly 1 is normal. If the detected oil level is lower than the standard value, it is determined to be in a low-oil state. In this low-oil state, the control system sends an opening command to the solenoid injection valve 106. Upon receiving the signal, the solenoid injection valve 106 actuates, opening the injection channel and spraying lubricating oil into the gearbox assembly 1. The sprayed lubricating oil first contacts the planetary gear set 105, and then... The rotation of the planetary gear set 105, with the gears meshing and driving each other, drives the flow of lubricating oil. At the same time, the high-speed rotation of the gears generates centrifugal force. Under the centrifugal force, the lubricating oil is thrown to all directions inside the gearbox assembly 1. Under the combined action of the meshing transmission of the planetary gear set 105 and centrifugal force, the lubricating oil continuously diffuses and gradually covers the transmission mechanism inside the gearbox assembly 1. The lubricating oil is evenly attached to the surface of the transmission mechanism, forming a lubricating film to achieve full contact. This process ensures that all transmission components inside the gearbox assembly 1 can be effectively lubricated, avoiding wear of components due to lack of oil. At the same time, it avoids energy loss caused by excessive lubricating oil and the problem of decreased mechanical transmission performance caused by insufficient oil, ensuring stable operation of the gearbox assembly 1.

Claims

1. A lubrication mechanism in a wind turbine gearbox, comprising a gearbox assembly (1), characterized in that: It also includes a generator (2); the generator (2) is provided at the rear end of the gearbox assembly (1); the gearbox assembly (1) includes a transmission input shaft (101), a transmission output shaft (102), an input shaft bearing (103), an output shaft bearing (104), a planetary gear set (105), an electromagnetic oil injection valve (106), a lubricating oil quantity sensor (107), and a transmission shaft protective cover (108); the transmission input shaft (101) is provided at the rear end of the transmission output shaft (102), and the transmission input shaft (101) and the transmission output shaft (102) are connected by bearings; the rear end of the transmission output shaft (102) is connected to the input shaft of the generator (2); the transmission input shaft (101) is provided with a transmission shaft protective cover (108) on its exterior.

2. The lubrication mechanism in a wind turbine gearbox according to claim 1, characterized in that: An input shaft bearing (103) is provided on the outside of the transmission input shaft (101), and the input shaft bearing (103) is connected to the transmission input shaft (101) bearing; an output shaft bearing (104) is provided on the outside of the transmission output shaft (102), and the output shaft bearing (104) is connected to the transmission output shaft (102) bearing; a transmission shaft protective cover (108) is connected to the flange of the input shaft bearing (103).

3. The lubrication mechanism in a wind turbine gearbox according to claim 2, characterized in that: The housings of the input shaft bearing (103) and the output shaft bearing (104) are connected by a flange.

4. The lubrication mechanism in a wind turbine gearbox according to claim 1, characterized in that: A planetary gear set (105) is provided on the outside of the transmission output shaft (102), and the overall structure cover of the planetary gear set (105) is fixedly connected to the transmission input shaft (101), and the internal planetary gears of the planetary gear set (105) are connected to the transmission output shaft (102) for gear transmission.

5. The lubrication mechanism in a wind turbine gearbox according to claim 4, characterized in that: The overall housing of the planetary gear set (105) is connected to the inner wall teeth of the input shaft bearing (103) and the output shaft bearing (104).

6. The lubrication mechanism in a wind turbine gearbox according to claim 2, characterized in that: The upper end of the overall housing of the input shaft bearing (103) and the output shaft bearing (104) is provided with an electromagnetic fuel injection valve (106), and the output end of the electromagnetic fuel injection valve (106) is located inside the gearbox assembly (1).

7. The lubrication mechanism in a wind turbine gearbox according to claim 2, characterized in that: A lubricating oil level sensor (107) is provided at the lower end of the overall housing of the input shaft bearing (103) and the output shaft bearing (104), and the output end of the lubricating oil level sensor (107) is located inside the gearbox assembly (1).

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