CN1587682A - Variable propeller gearbox of wind power generator - Google Patents

Abstract

The invention relates to a pitch-variable gearbox of a wind power generator. The box body includes a flange, a ring gear and a rear box body. The input shaft, the planet carrier of each level and the sun gear, and the output gear shaft are concentric, the input shaft is connected with the first-stage sun gear, the planet carrier of each level is connected with the next-stage sun gear, and the third-stage planet carrier is connected with the output gear Shaft connection, the output gear shaft is installed on the rear box by bearings, planetary gears are installed on each stage of the planet carrier, and oil seals are installed between the input shaft and the flange, and between the output gear shaft and the rear box. The advantages of the present invention are: the first and second stage internal ring gears are used as one part to make the structure compact; the internal ring gears and the internal ring gears of all levels are also used as a part of the box body, which can reduce the weight and is easy to process and disassemble. Convenient; the planetary wheel is installed with needle bearings, which can increase the carrying capacity and reduce the installation space. The output end adopts two oil seals, which is not easy to leak oil.

Description

Wind turbine pitch gearbox

technical field

The invention relates to a gear box, in particular to a wind power generator pitch gear box.

Background technique

Compared with traditional thermal power generation, the use of wind power generation has the advantage of no pollution to the environment. Compared with hydropower generation, it has the advantages of low infrastructure cost, small footprint, and convenient maintenance. For large hydropower stations, storage The reservoir is also prone to certain hidden safety hazards downstream. In wind turbines, the pitch gearbox is a special gearbox for adjusting the influence of wind speed on wind turbines. Due to the compact structure and high reliability requirements of the pitch gearbox, the wind turbines currently used in my country The gearbox is mainly imported, and the output shaft of this yaw gearbox is prone to oil leakage.

Contents of the invention

The purpose of the present invention is to provide a new wind power generator gear box for the practical problems that the reduction gear box, especially the variable pitch gear box for wind power generators, has a compact structure, high reliability requirements, and the output shaft is easy to leak oil during the use of imported products. Paddle gearbox to solve the oil leakage problem of the output shaft.

The purpose of the present invention is achieved in this way: a wind generator pitch gearbox, including a box, sun gear, planetary gear, planetary carrier, output gear shaft, is characterized in that: the box includes a flange, a ring gear and a rear box Between the body, the flange and the rear box, there are the first and second-stage internal ring gears and the third-stage internal ring gear, and the flange, the first and second-stage internal ring gears, the third-stage internal ring gear and the rear box Connected by bolts; the input shaft, the planet carrier at all levels, the sun gear at all levels, and the output gear shaft are concentric, the input shaft and the first-stage sun gear are connected by splines, and the first-stage planet carrier is connected to the second-stage sun by splines The second-stage planetary carrier is connected to the third-stage sun gear through splines, the third-stage planetary carrier is connected to the output gear shaft through splines, the output gear shaft is installed on the rear box through bearings, and the output gear shaft passes through There is an output gear at the end of the rear box; three planetary gears are evenly arranged around the planet carrier of each stage, and the planetary gears of each stage are in constant mesh with the corresponding inner ring gear and the sun gear of the same stage; between the input shaft and the flange , There is an oil seal between the output gear shaft and the rear box.

The advantages of the present invention are: the first and second stage internal ring gears are designed as one part, so that the structure is compact; at the same time, the first and second stage internal ring gears and the third stage internal ring gears are also used as the components of the box body, which not only reduces the The overall weight of the gearbox is low, and it is easy to process and disassemble; the planetary wheel adopts bearings, especially after being installed with needle bearings, which not only increases the carrying capacity, but also reduces the installation space. The output end adopts two seals to overcome the problem of oil leakage.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1. Flange, 2. Rear box, 3. The first and second stage internal ring gears, 4. The third stage internal ring gear, 5. The first stage planet carrier, 6. The first stage planetary gear, 7. First-stage sun gear, 8. Second-stage planet carrier, 9. Second-stage planetary gear, 10. Second-stage sun gear, 11. Third-stage planet carrier, 12. Third-stage planetary wheel, 13. The third stage sun gear, 14, input shaft, 15, output gear shaft, 16, oil seal, 17, bearing, 18, bearing pin.

Detailed ways

The accompanying drawing discloses a non-limiting structural diagram of a specific embodiment involved in the design invention, and the design invention will be further described below in conjunction with the accompanying drawings.

It can be seen from Fig. 1 that the embodiment of the present invention includes a flange 1 and a rear case body 2, and a first and second stage internal ring gear group 3 and a third stage internal ring gear 4 are arranged between the flange 1 and the rear case body 2. At the same time, the first and second-stage internal ring gears 3 and the third-stage internal ring gear 4 are used as the box body of the gearbox. The flange 1, the first and second-stage internal ring gears 3, the third-stage internal ring gear 4 and the rear box The body 2 is connected by bolts; the input shaft 14, the planet carrier of each level, the sun gear of each level, and the output gear shaft 15 are coaxial, the input shaft 14 is connected with the first-stage sun gear 7, and the first-stage planet carrier 5 is connected to the first-stage planetary carrier through splines The second-stage sun gear 10 is connected, the second-stage planet carrier 8 is connected to the third-stage sun gear 13 through a spline, the third-stage planet carrier 11 is connected to the output gear shaft 15 through a spline, and the output gear shaft 15 is installed through a bearing 17 On the rear box body 2, the output gear shaft 15 passes through the rear box body 2, and an output gear is arranged at its end; three planetary gears are uniformly arranged around each stage of the planet carrier, and the planetary gears of each level are respectively connected with the corresponding inner ring gear and The sun gears of the same level are constantly meshed; oil seals 16 are installed between the input shaft 14 and the flange 1, and between the output gear shaft 15 and the rear case 2. In this embodiment, the planetary wheels of each stage are respectively mounted on three pin shafts 18 evenly arranged around the corresponding planetary frame through bearings 17, and the bearings 17 for installing the planetary wheels are needle bearings; the output gear shaft 15 is connected to the rear Two oil seals 16 are installed on the box body 2, one oil seal 16 includes two parallel oil seals placed between two bearings 17, the other oil seal 16 is placed between the bearing 17 and the output gear; the input shaft 14 and the flange 1 and the oil seal 16 installed on the output gear shaft 15 and the rear casing 2 are all skeleton type oil seals.

Before use, the pitch-changing gearbox of the wind power generator is placed at the root of each blade, its input shaft 14 is equipped with a servo motor, and the output gear on its output gear shaft 15 is constantly meshed with the ring gear at the root of the blade. In the process, when the wind force changes, the control circuit will synchronously start all the servo motors installed on the pitch gearbox of the wind turbine to drive the output gear to change the angle of the blades, so that the wind turbine can adapt to the changing wind force. The working process of the wind turbine pitch gearbox is: the servo motor drives the first-stage sun gear 7 to rotate through the input shaft 14, because the first-stage planetary gear 6 is constantly meshed with the first-stage sun gear 7 and the first-stage ring gear at the same time , so that the first-stage planetary gear 6 runs around the first-stage sun gear 7, and the second-stage sun gear 10 is driven to rotate by the first-stage planetary carrier 5 during operation, and is transmitted to the third-stage planetary carrier 11 in the same way. The three-stage planet carrier 11 drives the output gear to rotate through the output gear shaft 15 to realize the adjustment of the blades.

Claims (5)

1, a kind of variable propeller gearbox of wind power generator comprises casing, sun gear, planet wheel, planet carrier, output gear shaft, it is characterized in that:

A) casing comprises flange, gear ring and rear box, is provided with the first secondary ring gear group and third level ring gear between flange and the rear box, and flange, the first secondary ring gear group, third level ring gear are connected by bolt with rear box;

B) input shaft, planet carrier at different levels, sun gear at different levels, output gear shaft concentric, input shaft is connected by spline with first order sun gear, first order planet carrier is connected with second level sun gear by spline, second level planet carrier is connected with third level sun gear by spline, third level planet carrier is connected with output gear shaft by spline, on rear box, output gear shaft passes rear box to output gear shaft by Bearing Installation, and its end is provided with output gear;

C) every grade of planet carrier periphery evenly is provided with three planet wheels, and planet wheels at different levels often mesh with corresponding ring gear and sun gear at the same level respectively;

D) between input shaft and the flange, between output gear shaft and the rear box oil sealing is housed all.

2, changing propeller pitch of wind power generator gear-box according to claim 1 is characterized in that: planet wheels at different levels are installed in respectively on even three positioning shafts that are provided with of corresponding planet carrier periphery by bearing.

3, variable propeller gearbox of wind power generator according to claim 2 is characterized in that: the described bearing that is used to install planet wheel is a needle bearing.

4, Yaw gearbox for wind power generator according to claim 1 is characterized in that: described oil sealing is skeleton oil sealing.

5, according to claim 1 or 2 or 4 described variable propeller gearbox of wind power generator, it is characterized in that: output gear shaft passes through two Bearing Installation on rear box, the twice oil sealing is housed on output gear shaft and the rear box, comprise together that wherein two oil sealings arranged side by side place between two bearings, another road is placed between bearing and the output gear by an oil sealing.

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